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Diffstat (limited to 'html/edit/003-shortcuts.mu.html')
| -rw-r--r-- | html/edit/003-shortcuts.mu.html | 6630 |
1 files changed, 3327 insertions, 3303 deletions
diff --git a/html/edit/003-shortcuts.mu.html b/html/edit/003-shortcuts.mu.html index 1f6ab8f0..6110e6a2 100644 --- a/html/edit/003-shortcuts.mu.html +++ b/html/edit/003-shortcuts.mu.html @@ -6,7 +6,7 @@ <meta name="Generator" content="Vim/7.4"> <meta name="plugin-version" content="vim7.4_v2"> <meta name="syntax" content="none"> -<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy="> +<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy="> <meta name="colorscheme" content="minimal"> <style type="text/css"> <!-- @@ -16,9 +16,10 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color .Delimiter { color: #800080; } .muControl { color: #c0a020; } .Special { color: #c00000; } -.Comment { color: #9090ff; } -.Constant { color: #00a0a0; } .SalientComment { color: #00ffff; } +.Constant { color: #00a0a0; } +.LineNr { color: #444444; } +.Comment { color: #9090ff; } .muRecipe { color: #ff8700; } .muScenario { color: #00af00; } --> @@ -27,3310 +28,3333 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color <script type='text/javascript'> <!-- +/* function to open any folds containing a jumped-to line before jumping to it */ +function JumpToLine() +{ + var lineNum; + lineNum = window.location.hash; + lineNum = lineNum.substr(1); /* strip off '#' */ + + if (lineNum.indexOf('L') == -1) { + lineNum = 'L'+lineNum; + } + lineElem = document.getElementById(lineNum); + /* Always jump to new location even if the line was hidden inside a fold, or + * we corrected the raw number to a line ID. + */ + if (lineElem) { + lineElem.scrollIntoView(true); + } + return true; +} +if ('onhashchange' in window) { + window.onhashchange = JumpToLine; +} + --> </script> </head> -<body> +<body onload='JumpToLine();'> <pre id='vimCodeElement'> -<span class="SalientComment">## special shortcuts for manipulating the editor</span> -<span class="Comment"># Some keys on the keyboard generate unicode characters, others generate</span> -<span class="Comment"># terminfo key codes. We need to modify different places in the two cases.</span> - -<span class="Comment"># tab - insert two spaces</span> - -<span class="muScenario">scenario</span> editor-inserts-two-spaces-on-tab [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># just one character in final line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[ab</span> -<span class="Constant">cd]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - assume-console [ - press tab - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> . ab .</span> - <span class="Constant"> .cd .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - tab?:bool <span class="Special"><-</span> equal c, <span class="Constant">9/tab</span> - <span class="muControl">break-unless</span> tab? -<span class="Constant"> <insert-character-begin></span> - insert-at-cursor editor, <span class="Constant">32/space</span>, screen - insert-at-cursor editor, <span class="Constant">32/space</span>, screen -<span class="Constant"> <insert-character-end></span> - <span class="muControl">return</span> <span class="Constant">1/go-render</span> - <span class="Delimiter">}</span> -] - -<span class="Comment"># backspace - delete character before cursor</span> - -<span class="muScenario">scenario</span> editor-handles-backspace-key [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> - press backspace - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .bc .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> <span class="Comment"># length of original line to overwrite</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - delete-previous-character?:bool <span class="Special"><-</span> equal c, <span class="Constant">8/backspace</span> - <span class="muControl">break-unless</span> delete-previous-character? -<span class="Constant"> <backspace-character-begin></span> - go-render?:bool, backspaced-cell:&:duplex-list:char <span class="Special"><-</span> delete-before-cursor editor, screen -<span class="Constant"> <backspace-character-end></span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> -] - -<span class="Comment"># return values:</span> -<span class="Comment"># go-render? - whether caller needs to update the screen</span> -<span class="Comment"># backspaced-cell - value deleted (or 0 if nothing was deleted) so we can save it for undo, etc.</span> -<span class="muRecipe">def</span> delete-before-cursor editor:&:editor, screen:&:screen<span class="muRecipe"> -> </span>go-render?:bool, backspaced-cell:&:duplex-list:char, editor:&:editor, screen:&:screen [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - data:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> - <span class="Comment"># if at start of text (before-cursor at § sentinel), return</span> - prev:&:duplex-list:char <span class="Special"><-</span> prev before-cursor - <span class="muControl">return-unless</span> prev, <span class="Constant">0/no-more-render</span>, <span class="Constant">0/nothing-deleted</span> - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[delete-before-cursor]</span> - original-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - scroll?:bool <span class="Special"><-</span> move-cursor-coordinates-left editor - backspaced-cell:&:duplex-list:char <span class="Special"><-</span> copy before-cursor - data <span class="Special"><-</span> remove before-cursor, data <span class="Comment"># will also neatly trim next/prev pointers in backspaced-cell/before-cursor</span> - before-cursor <span class="Special"><-</span> copy prev - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - <span class="muControl">return-if</span> scroll?, <span class="Constant">1/go-render</span> - screen-width:num <span class="Special"><-</span> screen-width screen - cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - <span class="Comment"># did we just backspace over a newline?</span> - same-row?:bool <span class="Special"><-</span> equal cursor-row, original-row - <span class="muControl">return-unless</span> same-row?, <span class="Constant">1/go-render</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor - screen <span class="Special"><-</span> move-cursor screen, cursor-row, cursor-column - curr-column:num <span class="Special"><-</span> copy cursor-column - <span class="Delimiter">{</span> - <span class="Comment"># hit right margin? give up and let caller render</span> - at-right?:bool <span class="Special"><-</span> greater-or-equal curr-column, right - <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span> - <span class="muControl">break-unless</span> curr - <span class="Comment"># newline? done.</span> - currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - screen <span class="Special"><-</span> print screen, currc - curr-column <span class="Special"><-</span> add curr-column,<span class="Constant"> 1</span> - curr <span class="Special"><-</span> next curr - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="Comment"># we're guaranteed not to be at the right margin</span> - space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span> - screen <span class="Special"><-</span> print screen, space - go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> -] - -<span class="muRecipe">def</span> move-cursor-coordinates-left editor:&:editor<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - go-render?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - <span class="Comment"># if not at left margin, move one character left</span> - <span class="Delimiter">{</span> - at-left-margin?:bool <span class="Special"><-</span> equal cursor-column, left - <span class="muControl">break-if</span> at-left-margin? - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[decrementing cursor column]</span> - cursor-column <span class="Special"><-</span> subtract cursor-column,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="muControl">return</span> - <span class="Delimiter">}</span> - <span class="Comment"># if at left margin, we must move to previous row:</span> - top-of-screen?:bool <span class="Special"><-</span> equal cursor-row,<span class="Constant"> 1</span> <span class="Comment"># exclude menu bar</span> - <span class="Delimiter">{</span> - <span class="muControl">break-if</span> top-of-screen? - cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - <span class="Delimiter">}</span> - <span class="Delimiter">{</span> - <span class="muControl">break-unless</span> top-of-screen? -<span class="Constant"> <scroll-up></span> - go-render? <span class="Special"><-</span> copy <span class="Constant">1/true</span> - <span class="Delimiter">}</span> - <span class="Delimiter">{</span> - <span class="Comment"># case 1: if previous character was newline, figure out how long the previous line is</span> - previous-character:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> - previous-character-is-newline?:bool <span class="Special"><-</span> equal previous-character, <span class="Constant">10/newline</span> - <span class="muControl">break-unless</span> previous-character-is-newline? - <span class="Comment"># compute length of previous line</span> - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[switching to previous line]</span> - d:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> - end-of-line:num <span class="Special"><-</span> previous-line-length before-cursor, d - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - width:num <span class="Special"><-</span> subtract right, left - wrap?:bool <span class="Special"><-</span> greater-than end-of-line, width - <span class="Delimiter">{</span> - <span class="muControl">break-unless</span> wrap? - _, column-offset:num <span class="Special"><-</span> divide-with-remainder end-of-line, width - cursor-column <span class="Special"><-</span> add left, column-offset - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="Delimiter">}</span> - <span class="Delimiter">{</span> - <span class="muControl">break-if</span> wrap? - cursor-column <span class="Special"><-</span> add left, end-of-line - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="Delimiter">}</span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> - <span class="Comment"># case 2: if previous-character was not newline, we're just at a wrapped line</span> - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[wrapping to previous line]</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - cursor-column <span class="Special"><-</span> subtract right,<span class="Constant"> 1</span> <span class="Comment"># leave room for wrap icon</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column -] - -<span class="Comment"># takes a pointer 'curr' into the doubly-linked list and its sentinel, counts</span> -<span class="Comment"># the length of the previous line before the 'curr' pointer.</span> -<span class="muRecipe">def</span> previous-line-length curr:&:duplex-list:char, start:&:duplex-list:char<span class="muRecipe"> -> </span>result:num [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - result:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> - <span class="muControl">return-unless</span> curr - at-start?:bool <span class="Special"><-</span> equal curr, start - <span class="muControl">return-if</span> at-start? - <span class="Delimiter">{</span> - curr <span class="Special"><-</span> prev curr - <span class="muControl">break-unless</span> curr - at-start?:bool <span class="Special"><-</span> equal curr, start - <span class="muControl">break-if</span> at-start? - c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - result <span class="Special"><-</span> add result,<span class="Constant"> 1</span> - <span class="muControl">loop</span> - <span class="Delimiter">}</span> -] - -<span class="muScenario">scenario</span> editor-clears-last-line-on-backspace [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># just one character in final line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[ab</span> -<span class="Constant">cd]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> <span class="Comment"># cursor at only character in final line</span> - press backspace - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 2</span> - ] -] - -<span class="muScenario">scenario</span> editor-joins-and-wraps-lines-on-backspace [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with two long-ish but non-wrapping lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc def</span> -<span class="Constant">ghi jkl]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># position the cursor at the start of the second and hit backspace</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> - press backspace - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># resulting single line should wrap correctly</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc defgh↩.</span> - <span class="Constant"> .i jkl .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-wraps-long-lines-on-backspace [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor in part of the screen with a long line</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc def ghij]</span>, <span class="Constant">0/left</span>, <span class="Constant">8/right</span> - editor-render screen, e - <span class="Comment"># confirm that it wraps</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc def↩ .</span> - <span class="Constant"> . ghij .</span> - <span class="Constant"> .╌╌╌╌╌╌╌╌ .</span> - ] - $clear-trace - <span class="Comment"># position the cursor somewhere in the middle of the top screen line and hit backspace</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 4</span> - press backspace - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># resulting single line should wrap correctly and not overflow its bounds</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcdef ↩ .</span> - <span class="Constant"> .ghij .</span> - <span class="Constant"> .╌╌╌╌╌╌╌╌ .</span> - <span class="Constant"> . .</span> - ] -] - -<span class="Comment"># delete - delete character at cursor</span> - -<span class="muScenario">scenario</span> editor-handles-delete-key [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - press delete - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .bc .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> <span class="Comment"># length of original line to overwrite</span> - $clear-trace - assume-console [ - press delete - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span> <span class="Comment"># new length to overwrite</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - delete-next-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65522/delete</span> - <span class="muControl">break-unless</span> delete-next-character? -<span class="Constant"> <delete-character-begin></span> - go-render?:bool, deleted-cell:&:duplex-list:char <span class="Special"><-</span> delete-at-cursor editor, screen -<span class="Constant"> <delete-character-end></span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> delete-at-cursor editor:&:editor, screen:&:screen<span class="muRecipe"> -> </span>go-render?:bool, deleted-cell:&:duplex-list:char, editor:&:editor, screen:&:screen [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - data:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> - deleted-cell:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="muControl">return-unless</span> deleted-cell, <span class="Constant">0/don't-render</span> - currc:char <span class="Special"><-</span> get *deleted-cell, <span class="Constant">value:offset</span> - data <span class="Special"><-</span> remove deleted-cell, data - deleted-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> - <span class="muControl">return-if</span> deleted-newline?, <span class="Constant">1/go-render</span> - <span class="Comment"># wasn't a newline? render rest of line</span> - curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor <span class="Comment"># refresh after remove above</span> - cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - screen <span class="Special"><-</span> move-cursor screen, cursor-row, cursor-column - curr-column:num <span class="Special"><-</span> copy cursor-column - screen-width:num <span class="Special"><-</span> screen-width screen - <span class="Delimiter">{</span> - <span class="Comment"># hit right margin? give up and let caller render</span> - at-right?:bool <span class="Special"><-</span> greater-or-equal curr-column, screen-width - <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span> - <span class="muControl">break-unless</span> curr - <span class="Comment"># newline? done.</span> - currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - screen <span class="Special"><-</span> print screen, currc - curr-column <span class="Special"><-</span> add curr-column,<span class="Constant"> 1</span> - curr <span class="Special"><-</span> next curr - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="Comment"># we're guaranteed not to be at the right margin</span> - space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span> - screen <span class="Special"><-</span> print screen, space - go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> -] - -<span class="Comment"># right arrow</span> - -<span class="muScenario">scenario</span> editor-moves-cursor-right-with-key [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - press right-arrow - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a0bc .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> <span class="Comment"># 0 and following characters</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - move-to-next-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65514/right-arrow</span> - <span class="muControl">break-unless</span> move-to-next-character? - <span class="Comment"># if not at end of text</span> - next-cursor:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="muControl">break-unless</span> next-cursor - <span class="Comment"># scan to next character</span> -<span class="Constant"> <move-cursor-begin></span> - before-cursor <span class="Special"><-</span> copy next-cursor - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - go-render?:bool <span class="Special"><-</span> move-cursor-coordinates-right editor, screen-height - screen <span class="Special"><-</span> move-cursor screen, cursor-row, cursor-column - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">2/right-arrow</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> move-cursor-coordinates-right editor:&:editor, screen-height:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor <span class="Constant">before-cursor:offset</span> - cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - <span class="Comment"># if crossed a newline, move cursor to start of next row</span> - <span class="Delimiter">{</span> - old-cursor-character:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> - was-at-newline?:bool <span class="Special"><-</span> equal old-cursor-character, <span class="Constant">10/newline</span> - <span class="muControl">break-unless</span> was-at-newline? - cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - cursor-column <span class="Special"><-</span> copy left - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - below-screen?:bool <span class="Special"><-</span> greater-or-equal cursor-row, screen-height <span class="Comment"># must be equal</span> - <span class="muControl">return-unless</span> below-screen?, <span class="Constant">0/don't-render</span> -<span class="Constant"> <scroll-down></span> - cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> <span class="Comment"># bring back into screen range</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - <span class="muControl">return</span> <span class="Constant">1/go-render</span> - <span class="Delimiter">}</span> - <span class="Comment"># if the line wraps, move cursor to start of next row</span> - <span class="Delimiter">{</span> - <span class="Comment"># if we're at the column just before the wrap indicator</span> - wrap-column:num <span class="Special"><-</span> subtract right,<span class="Constant"> 1</span> - at-wrap?:bool <span class="Special"><-</span> equal cursor-column, wrap-column - <span class="muControl">break-unless</span> at-wrap? - <span class="Comment"># and if next character isn't newline</span> - next:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="muControl">break-unless</span> next - next-character:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> - newline?:bool <span class="Special"><-</span> equal next-character, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> newline? - cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - cursor-column <span class="Special"><-</span> copy left - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - below-screen?:bool <span class="Special"><-</span> greater-or-equal cursor-row, screen-height <span class="Comment"># must be equal</span> - <span class="muControl">return-unless</span> below-screen?, <span class="Constant">0/no-more-render</span> -<span class="Constant"> <scroll-down></span> - cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> <span class="Comment"># bring back into screen range</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - <span class="muControl">return</span> <span class="Constant">1/go-render</span> - <span class="Delimiter">}</span> - <span class="Comment"># otherwise move cursor one character right</span> - cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># type right-arrow a few times to get to start of second line</span> - assume-console [ - press right-arrow - press right-arrow - press right-arrow - press right-arrow <span class="Comment"># next line</span> - ] - run [ - editor-event-loop screen, console, e - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - <span class="Comment"># type something and ensure it goes where it should</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .0d .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span> <span class="Comment"># new length of second line</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">1/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - assume-console [ - press right-arrow - press right-arrow - press right-arrow - press right-arrow <span class="Comment"># next line</span> - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> . abc .</span> - <span class="Constant"> . 0d .</span> - <span class="Constant"> . ╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcdef]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press right-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd↩ .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .╌╌╌╌╌ .</span> - <span class="Constant"> . .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># line just barely wrapping</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcde]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># position cursor at last character before wrap and hit right-arrow</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press right-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - <span class="Comment"># now hit right arrow again</span> - assume-console [ - press right-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow-3 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcdef]</span>, <span class="Constant">1/left</span>, <span class="Constant">6/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 4</span> - press right-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> . abcd↩ .</span> - <span class="Constant"> . ef .</span> - <span class="Constant"> . ╌╌╌╌╌ .</span> - <span class="Constant"> . .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow-at-end-of-line [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># move to end of line, press right-arrow, type a character</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press right-arrow - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># new character should be in next line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .0d .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span> -] - -<span class="Comment"># todo: ctrl-right: next word-end</span> - -<span class="Comment"># left arrow</span> - -<span class="muScenario">scenario</span> editor-moves-cursor-left-with-key [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span> - press left-arrow - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a0bc .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - move-to-previous-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65515/left-arrow</span> - <span class="muControl">break-unless</span> move-to-previous-character? - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[left arrow]</span> - <span class="Comment"># if not at start of text (before-cursor at § sentinel)</span> - prev:&:duplex-list:char <span class="Special"><-</span> prev before-cursor - <span class="muControl">return-unless</span> prev, <span class="Constant">0/don't-render</span> -<span class="Constant"> <move-cursor-begin></span> - go-render? <span class="Special"><-</span> move-cursor-coordinates-left editor - before-cursor <span class="Special"><-</span> copy prev - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">1/left-arrow</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with two lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># position cursor at start of second line (so there's no previous newline)</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> - press left-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with three lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">def</span> -<span class="Constant">g]</span> - e:&:editor <span class="Special"><-</span> new-editor s:text, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># position cursor further down (so there's a newline before the character at</span> - <span class="Comment"># the cursor)</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press left-arrow - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .def0 .</span> - <span class="Constant"> .g .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] - check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span> <span class="Comment"># just the '0'</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-3 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">def</span> -<span class="Constant">g]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># position cursor at start of text, press left-arrow, then type a character</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 0</span> - press left-arrow - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># left-arrow should have had no effect</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .0abc .</span> - <span class="Constant"> .def .</span> - <span class="Constant"> .g .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] - check-trace-count-for-label<span class="Constant"> 4</span>, <span class="Constant">[print-character]</span> <span class="Comment"># length of first line</span> -] - -<span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-4 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with text containing an empty line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> - -d] - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e:&:editor - $clear-trace - <span class="Comment"># position cursor right after empty line</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press left-arrow - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .0 .</span> - <span class="Constant"> .d .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] - check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span> <span class="Comment"># just the '0'</span> -] - -<span class="muScenario">scenario</span> editor-moves-across-screen-lines-across-wrap-with-left-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with a wrapping line</span> - e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcdef]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - $clear-trace - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd↩ .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .╌╌╌╌╌ .</span> - <span class="Constant"> . .</span> - ] - <span class="Comment"># position cursor right after empty line</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> - press left-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> <span class="Comment"># previous row</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> <span class="Comment"># right margin except wrap icon</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-across-screen-lines-to-wrapping-line-with-left-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with a wrapping line followed by a second line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span class="Constant">g]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - $clear-trace - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd↩ .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .g .</span> - <span class="Constant"> .╌╌╌╌╌ .</span> - ] - <span class="Comment"># position cursor right after empty line</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press left-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> <span class="Comment"># previous row</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> <span class="Comment"># end of wrapped line</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-across-screen-lines-to-non-wrapping-line-with-left-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># initialize editor with a line on the verge of wrapping, followed by a second line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcd</span> -<span class="Constant">e]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - $clear-trace - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd .</span> - <span class="Constant"> .e .</span> - <span class="Constant"> .╌╌╌╌╌ .</span> - <span class="Constant"> . .</span> - ] - <span class="Comment"># position cursor right after empty line</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> - press left-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> <span class="Comment"># previous row</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 4</span> <span class="Comment"># end of wrapped line</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="Comment"># todo: ctrl-left: previous word-start</span> - -<span class="Comment"># up arrow</span> - -<span class="muScenario">scenario</span> editor-moves-to-previous-line-with-up-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">def]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> - press up-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a0bc .</span> - <span class="Constant"> .def .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - move-to-previous-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65517/up-arrow</span> - <span class="muControl">break-unless</span> move-to-previous-line? -<span class="Constant"> <move-cursor-begin></span> - go-render? <span class="Special"><-</span> move-to-previous-line editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">3/up-arrow</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> move-to-previous-line editor:&:editor<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - go-render?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> - cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - already-at-top?:bool <span class="Special"><-</span> lesser-or-equal cursor-row, <span class="Constant">1/top</span> - <span class="Delimiter">{</span> - <span class="Comment"># if cursor not at top, move it</span> - <span class="muControl">break-if</span> already-at-top? - <span class="Comment"># if not at newline, move to start of line (previous newline)</span> - <span class="Comment"># then scan back another line</span> - <span class="Comment"># if either step fails, give up without modifying cursor or coordinates</span> - curr:&:duplex-list:char <span class="Special"><-</span> copy before-cursor - <span class="Delimiter">{</span> - old:&:duplex-list:char <span class="Special"><-</span> copy curr - c2:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal c2, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - curr:&:duplex-list:char <span class="Special"><-</span> before-previous-line curr, editor - no-motion?:bool <span class="Special"><-</span> equal curr, old - <span class="muControl">return-if</span> no-motion? - <span class="Delimiter">}</span> - <span class="Delimiter">{</span> - old <span class="Special"><-</span> copy curr - curr <span class="Special"><-</span> before-previous-line curr, editor - no-motion?:bool <span class="Special"><-</span> equal curr, old - <span class="muControl">return-if</span> no-motion? - <span class="Delimiter">}</span> - before-cursor <span class="Special"><-</span> copy curr - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - <span class="Comment"># scan ahead to right column or until end of line</span> - target-column:num <span class="Special"><-</span> copy cursor-column - cursor-column <span class="Special"><-</span> copy left - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="Delimiter">{</span> - done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, target-column - <span class="muControl">break-if</span> done? - curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="muControl">break-unless</span> curr - currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - <span class="Comment">#</span> - before-cursor <span class="Special"><-</span> copy curr - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> - <span class="Delimiter">{</span> - <span class="Comment"># if cursor already at top, scroll up</span> - <span class="muControl">break-unless</span> already-at-top? -<span class="Constant"> <scroll-up></span> - <span class="muControl">return</span> <span class="Constant">1/go-render</span> - <span class="Delimiter">}</span> -] - -<span class="muScenario">scenario</span> editor-adjusts-column-at-previous-line [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[ab</span> -<span class="Constant">def]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> - press up-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .ab0 .</span> - <span class="Constant"> .def .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-adjusts-column-at-empty-line [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new [ -<span class="muRecipe">def</span>] - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> - press up-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .0 .</span> - <span class="Constant"> .def .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-moves-to-previous-line-from-left-margin [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># start out with three lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">def</span> -<span class="Constant">ghi]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># click on the third line and hit up-arrow, so you end up just after a newline</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press up-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .0def .</span> - <span class="Constant"> .ghi .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] -] - -<span class="Comment"># down arrow</span> - -<span class="muScenario">scenario</span> editor-moves-to-next-line-with-down-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">def]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># cursor starts out at (1, 0)</span> - assume-console [ - press down-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># ..and ends at (2, 0)</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .0def .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - move-to-next-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65516/down-arrow</span> - <span class="muControl">break-unless</span> move-to-next-line? -<span class="Constant"> <move-cursor-begin></span> - go-render? <span class="Special"><-</span> move-to-next-line editor, screen-height - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">4/down-arrow</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> move-to-next-line editor:&:editor, screen-height:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - last-line:num <span class="Special"><-</span> subtract screen-height,<span class="Constant"> 1</span> - already-at-bottom?:bool <span class="Special"><-</span> greater-or-equal cursor-row, last-line - <span class="Delimiter">{</span> - <span class="Comment"># if cursor not at bottom, move it</span> - <span class="muControl">break-if</span> already-at-bottom? - <span class="Comment"># scan to start of next line, then to right column or until end of line</span> - max:num <span class="Special"><-</span> subtract right, left - next-line:&:duplex-list:char <span class="Special"><-</span> before-start-of-next-line before-cursor, max - <span class="Delimiter">{</span> - <span class="Comment"># already at end of buffer? try to scroll up (so we can see more</span> - <span class="Comment"># warnings or sandboxes below)</span> - no-motion?:bool <span class="Special"><-</span> equal next-line, before-cursor - <span class="muControl">break-unless</span> no-motion? - scroll?:bool <span class="Special"><-</span> greater-than cursor-row,<span class="Constant"> 1</span> - <span class="muControl">break-if</span> scroll?, <span class="Constant">+try-to-scroll</span> - <span class="muControl">return</span> <span class="Constant">0/don't-render</span> - <span class="Delimiter">}</span> - cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row - before-cursor <span class="Special"><-</span> copy next-line - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - target-column:num <span class="Special"><-</span> copy cursor-column - cursor-column <span class="Special"><-</span> copy left - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="Delimiter">{</span> - done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, target-column - <span class="muControl">break-if</span> done? - curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="muControl">break-unless</span> curr - currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - <span class="Comment">#</span> - before-cursor <span class="Special"><-</span> copy curr - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="muControl">return</span> <span class="Constant">0/don't-render</span> - <span class="Delimiter">}</span> -<span class="Constant"> +try-to-scroll</span> -<span class="Constant"> <scroll-down></span> - go-render? <span class="Special"><-</span> copy <span class="Constant">1/true</span> -] - -<span class="muScenario">scenario</span> editor-adjusts-column-at-next-line [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">de]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abc .</span> - <span class="Constant"> .de0 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="Comment"># ctrl-a/home - move cursor to start of line</span> - -<span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-ctrl-a [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on second line, press ctrl-a</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> - press ctrl-a - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to start of line</span> - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - move-to-start-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">1/ctrl-a</span> - <span class="muControl">break-unless</span> move-to-start-of-line? -<span class="Constant"> <move-cursor-begin></span> - move-to-start-of-line editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> <span class="Constant">0/don't-render</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - move-to-start-of-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65521/home</span> - <span class="muControl">break-unless</span> move-to-start-of-line? -<span class="Constant"> <move-cursor-begin></span> - move-to-start-of-line editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> <span class="Constant">0/don't-render</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> move-to-start-of-line editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - <span class="Comment"># update cursor column</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - cursor-column:num <span class="Special"><-</span> copy left - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="Comment"># update before-cursor</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - init:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> - <span class="Comment"># while not at start of line, move</span> - <span class="Delimiter">{</span> - at-start-of-text?:bool <span class="Special"><-</span> equal before-cursor, init - <span class="muControl">break-if</span> at-start-of-text? - prev:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> - at-start-of-line?:bool <span class="Special"><-</span> equal prev, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-start-of-line? - before-cursor <span class="Special"><-</span> prev before-cursor - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - assert before-cursor, <span class="Constant">[move-to-start-of-line tried to move before start of text]</span> - <span class="muControl">loop</span> - <span class="Delimiter">}</span> -] - -<span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-ctrl-a-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on first line (no newline before), press ctrl-a</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press ctrl-a - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to start of line</span> - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-home [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - $clear-trace - <span class="Comment"># start on second line, press 'home'</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> - press home - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to start of line</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-home-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on first line (no newline before), press 'home'</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press home - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to start of line</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="Comment"># ctrl-e/end - move cursor to end of line</span> - -<span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-ctrl-e [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on first line, press ctrl-e</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> - press ctrl-e - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to end of line</span> - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - <span class="Comment"># editor inserts future characters at cursor</span> - assume-console [ - type <span class="Constant">[z]</span> - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 4</span> - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123z .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - move-to-end-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">5/ctrl-e</span> - <span class="muControl">break-unless</span> move-to-end-of-line? -<span class="Constant"> <move-cursor-begin></span> - move-to-end-of-line editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> <span class="Constant">0/don't-render</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - move-to-end-of-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65520/end</span> - <span class="muControl">break-unless</span> move-to-end-of-line? -<span class="Constant"> <move-cursor-begin></span> - move-to-end-of-line editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - <span class="muControl">return</span> <span class="Constant">0/don't-render</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> move-to-end-of-line editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> - <span class="Comment"># while not at start of line, move</span> - <span class="Delimiter">{</span> - next:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="muControl">break-unless</span> next <span class="Comment"># end of text</span> - nextc:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> - at-end-of-line?:bool <span class="Special"><-</span> equal nextc, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-end-of-line? - before-cursor <span class="Special"><-</span> copy next - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column - <span class="muControl">loop</span> - <span class="Delimiter">}</span> -] - -<span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-ctrl-e-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on second line (no newline after), press ctrl-e</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> - press ctrl-e - ] - run [ - editor-event-loop screen, console, e - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to end of line</span> - memory-should-contain [ - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-end [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on first line, press 'end'</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> - press end - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to end of line</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-end-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># start on second line (no newline after), press 'end'</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> - press end - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># cursor moves to end of line</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> -] - -<span class="Comment"># ctrl-u - delete text from start of line until (but not at) cursor</span> - -<span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start on second line, press ctrl-u</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 2</span> - press ctrl-u - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes to start of line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123 .</span> - <span class="Constant"> .6 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - delete-to-start-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">21/ctrl-u</span> - <span class="muControl">break-unless</span> delete-to-start-of-line? -<span class="Constant"> <delete-to-start-of-line-begin></span> - deleted-cells:&:duplex-list:char <span class="Special"><-</span> delete-to-start-of-line editor -<span class="Constant"> <delete-to-start-of-line-end></span> - <span class="muControl">return</span> <span class="Constant">1/go-render</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> delete-to-start-of-line editor:&:editor<span class="muRecipe"> -> </span>result:&:duplex-list:char, editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - <span class="Comment"># compute range to delete</span> - init:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - start:&:duplex-list:char <span class="Special"><-</span> copy before-cursor - end:&:duplex-list:char <span class="Special"><-</span> next before-cursor - <span class="Delimiter">{</span> - at-start-of-text?:bool <span class="Special"><-</span> equal start, init - <span class="muControl">break-if</span> at-start-of-text? - curr:char <span class="Special"><-</span> get *start, <span class="Constant">value:offset</span> - at-start-of-line?:bool <span class="Special"><-</span> equal curr, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-start-of-line? - start <span class="Special"><-</span> prev start - assert start, <span class="Constant">[delete-to-start-of-line tried to move before start of text]</span> - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="Comment"># snip it out</span> - result:&:duplex-list:char <span class="Special"><-</span> next start - remove-between start, end - <span class="Comment"># adjust cursor</span> - before-cursor <span class="Special"><-</span> copy start - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, left -] - -<span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start on first line (no newline before), press ctrl-u</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span> - press ctrl-u - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes to start of line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .3 .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u-3 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start past end of line, press ctrl-u</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press ctrl-u - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes to start of line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> . .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-deletes-to-start-of-final-line-with-ctrl-u [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start past end of final line, press ctrl-u</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> - press ctrl-u - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes to start of line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123 .</span> - <span class="Constant"> . .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="Comment"># ctrl-k - delete text from cursor to end of line (but not the newline)</span> - -<span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start on first line, press ctrl-k</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> - press ctrl-k - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes to end of line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .1 .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - delete-to-end-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">11/ctrl-k</span> - <span class="muControl">break-unless</span> delete-to-end-of-line? -<span class="Constant"> <delete-to-end-of-line-begin></span> - deleted-cells:&:duplex-list:char <span class="Special"><-</span> delete-to-end-of-line editor -<span class="Constant"> <delete-to-end-of-line-end></span> - <span class="muControl">return</span> <span class="Constant">1/go-render</span> - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> delete-to-end-of-line editor:&:editor<span class="muRecipe"> -> </span>result:&:duplex-list:char, editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - <span class="Comment"># compute range to delete</span> - start:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - end:&:duplex-list:char <span class="Special"><-</span> next start - <span class="Delimiter">{</span> - at-end-of-text?:bool <span class="Special"><-</span> equal end, <span class="Constant">0/null</span> - <span class="muControl">break-if</span> at-end-of-text? - curr:char <span class="Special"><-</span> get *end, <span class="Constant">value:offset</span> - at-end-of-line?:bool <span class="Special"><-</span> equal curr, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-end-of-line? - end <span class="Special"><-</span> next end - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="Comment"># snip it out</span> - result <span class="Special"><-</span> next start - remove-between start, end -] - -<span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-2 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start on second line (no newline after), press ctrl-k</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> - press ctrl-k - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes to end of line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123 .</span> - <span class="Constant"> .4 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-3 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start at end of line</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span> - press ctrl-k - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes just last character</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .12 .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-4 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start past end of line</span> - assume-console [ - left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> - press ctrl-k - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes nothing</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123 .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-5 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start at end of text</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 2</span> - press ctrl-k - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes just the final character</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123 .</span> - <span class="Constant"> .45 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-6 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[123</span> -<span class="Constant">456]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - <span class="Comment"># start past end of text</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> - press ctrl-k - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># cursor deletes nothing</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .123 .</span> - <span class="Constant"> .456 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="Comment"># cursor-down can scroll if necessary</span> - -<span class="muScenario">scenario</span> editor-can-scroll-down-using-arrow-keys [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with >3 lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># position cursor at last line, then try to move further down</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen slides by one line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><scroll-down></span> [ - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll down]</span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - max:num <span class="Special"><-</span> subtract right, left - old-top:&:duplex-list:char <span class="Special"><-</span> copy top-of-screen - top-of-screen <span class="Special"><-</span> before-start-of-next-line top-of-screen, max - *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen - no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen - <span class="muControl">return-if</span> no-movement?, <span class="Constant">0/don't-render</span> -] - -<span class="Comment"># takes a pointer into the doubly-linked list, scans ahead at most 'max'</span> -<span class="Comment"># positions until the next newline</span> -<span class="Comment"># beware: never return null pointer.</span> -<span class="muRecipe">def</span> before-start-of-next-line original:&:duplex-list:char, max:num<span class="muRecipe"> -> </span>curr:&:duplex-list:char [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> - curr:&:duplex-list:char <span class="Special"><-</span> copy original - <span class="Comment"># skip the initial newline if it exists</span> - <span class="Delimiter">{</span> - c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> - <span class="muControl">break-unless</span> at-newline? - curr <span class="Special"><-</span> next curr - count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> - <span class="Delimiter">}</span> - <span class="Delimiter">{</span> - <span class="muControl">return-unless</span> curr, original - done?:bool <span class="Special"><-</span> greater-or-equal count, max - <span class="muControl">break-if</span> done? - c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> - <span class="muControl">break-if</span> at-newline? - curr <span class="Special"><-</span> next curr - count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="muControl">return-unless</span> curr, original - <span class="muControl">return</span> curr -] - -<span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> - <span class="Comment"># other lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span class="Constant">g</span> -<span class="Constant">h</span> -<span class="Constant">i]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd↩ .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .g .</span> - ] - <span class="Comment"># position cursor at last line, then try to move further down</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .g .</span> - <span class="Constant"> .h .</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys-2 [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor starts with a long line wrapping twice</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> -<span class="Constant">k</span> -<span class="Constant">l</span> -<span class="Constant">m]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - <span class="Comment"># position cursor at last line, then try to move further down</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line containing a wrap icon</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .efgh↩ .</span> - <span class="Constant"> .ij .</span> - <span class="Constant"> .k .</span> - ] - <span class="Comment"># scroll down again</span> - assume-console [ - press down-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .ij .</span> - <span class="Constant"> .k .</span> - <span class="Constant"> .l .</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-down-when-line-wraps [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains a long line in the third line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">cdef]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - <span class="Comment"># position cursor at end, type a character</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> - type <span class="Constant">[g]</span> - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen scrolls</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> -<span class="Constant"> .cdef↩.</span> - <span class="Constant"> .g .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-down-on-newline [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># position cursor after last line and type newline</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> - type [ -] - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen scrolls</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> . .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains a wrapped line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">cdefgh]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - <span class="Comment"># position cursor at end of screen and try to move right</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> - press right-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen scrolls</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> -<span class="Constant"> .cdef↩.</span> - <span class="Constant"> .gh .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow-2 [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains more lines than can fit on screen</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - <span class="Comment"># position cursor at end of screen and try to move right</span> - assume-console [ - left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> - press right-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen scrolls</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-at-end-on-down-arrow [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span class="Constant">de]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - $clear-trace - <span class="Comment"># try to move down past end of text</span> - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen should scroll, moving cursor to end of text</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> - ] - assume-console [ - type <span class="Constant">[0]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .de0 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] - <span class="Comment"># try to move down again</span> - $clear-trace - assume-console [ - left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen stops scrolling because cursor is already at top</span> - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> - ] - check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> - assume-console [ - type <span class="Constant">[1]</span> - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .de01 .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - <span class="Constant"> . .</span> - ] -] - -<span class="muScenario">scenario</span> editor-combines-page-and-line-scroll [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with a few pages of lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d</span> -<span class="Constant">e</span> -<span class="Constant">f</span> -<span class="Constant">g]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - <span class="Comment"># scroll down one page and one line</span> - assume-console [ - press page-down - left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen scrolls down 3 lines</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .d .</span> - <span class="Constant"> .e .</span> - <span class="Constant"> .f .</span> - ] -] - -<span class="Comment"># cursor-up can scroll if necessary</span> - -<span class="muScenario">scenario</span> editor-can-scroll-up-using-arrow-keys [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with >3 lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># position cursor at top of second page, then try to move up</span> - assume-console [ - press page-down - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen slides by one line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><scroll-up></span> [ - trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll up]</span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - old-top:&:duplex-list:char <span class="Special"><-</span> copy top-of-screen - top-of-screen <span class="Special"><-</span> before-previous-line top-of-screen, editor - *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen - no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen - <span class="muControl">return-if</span> no-movement?, <span class="Constant">0/don't-render</span> -] - -<span class="Comment"># takes a pointer into the doubly-linked list, scans back to before start of</span> -<span class="Comment"># previous *wrapped* line</span> -<span class="Comment"># beware: never return null pointer</span> -<span class="muRecipe">def</span> before-previous-line in:&:duplex-list:char, editor:&:editor<span class="muRecipe"> -> </span>out:&:duplex-list:char [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - curr:&:duplex-list:char <span class="Special"><-</span> copy in - c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> - <span class="Comment"># compute max, number of characters to skip</span> - <span class="Comment"># 1 + len%(width-1)</span> - <span class="Comment"># except rotate second term to vary from 1 to width-1 rather than 0 to width-2</span> - left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> - right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> - max-line-length:num <span class="Special"><-</span> subtract right, left, <span class="Constant">-1/exclusive-right</span>, <span class="Constant">1/wrap-icon</span> - sentinel:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> - len:num <span class="Special"><-</span> previous-line-length curr, sentinel - <span class="Delimiter">{</span> - <span class="muControl">break-if</span> len - <span class="Comment"># empty line; just skip this newline</span> - prev:&:duplex-list:char <span class="Special"><-</span> prev curr - <span class="muControl">return-unless</span> prev, curr - <span class="muControl">return</span> prev - <span class="Delimiter">}</span> - _, max:num <span class="Special"><-</span> divide-with-remainder len, max-line-length - <span class="Comment"># remainder 0 => scan one width-worth</span> - <span class="Delimiter">{</span> - <span class="muControl">break-if</span> max - max <span class="Special"><-</span> copy max-line-length - <span class="Delimiter">}</span> - max <span class="Special"><-</span> add max,<span class="Constant"> 1</span> - count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> - <span class="Comment"># skip 'max' characters</span> - <span class="Delimiter">{</span> - done?:bool <span class="Special"><-</span> greater-or-equal count, max - <span class="muControl">break-if</span> done? - prev:&:duplex-list:char <span class="Special"><-</span> prev curr - <span class="muControl">break-unless</span> prev - curr <span class="Special"><-</span> copy prev - count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> - <span class="muControl">loop</span> - <span class="Delimiter">}</span> - <span class="muControl">return</span> curr -] - -<span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> - <span class="Comment"># other lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span class="Constant">g</span> -<span class="Constant">h</span> -<span class="Constant">i]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd↩ .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .g .</span> - ] - <span class="Comment"># position cursor at top of second page, just below wrapped line</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .g .</span> - <span class="Constant"> .h .</span> - <span class="Constant"> .i .</span> - ] - <span class="Comment"># now move up one line</span> - assume-console [ - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .ef .</span> - <span class="Constant"> .g .</span> - <span class="Constant"> .h .</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-2 [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 4 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> - <span class="Comment"># editor starts with a long line wrapping twice, occupying 3 of the 4 lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> -<span class="Constant">k</span> -<span class="Constant">l</span> -<span class="Constant">m]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - <span class="Comment"># position cursor at top of second page</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .k .</span> - <span class="Constant"> .l .</span> - <span class="Constant"> .m .</span> - <span class="Constant"> .╌╌╌╌╌ .</span> - ] - <span class="Comment"># move up one line</span> - assume-console [ - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .ij .</span> - <span class="Constant"> .k .</span> - <span class="Constant"> .l .</span> - <span class="Constant"> .m .</span> - ] - <span class="Comment"># move up a second line</span> - assume-console [ - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .efgh↩ .</span> - <span class="Constant"> .ij .</span> - <span class="Constant"> .k .</span> - <span class="Constant"> .l .</span> - ] - <span class="Comment"># move up a third line</span> - assume-console [ - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcd↩ .</span> - <span class="Constant"> .efgh↩ .</span> - <span class="Constant"> .ij .</span> - <span class="Constant"> .k .</span> - ] -] - -<span class="Comment"># same as editor-scrolls-up-past-wrapped-line-using-arrow-keys but length</span> -<span class="Comment"># slightly off, just to prevent over-training</span> -<span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-3 [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> - <span class="Comment"># other lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span class="Constant">g</span> -<span class="Constant">h</span> -<span class="Constant">i]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .abcde↩ .</span> - <span class="Constant"> .f .</span> - <span class="Constant"> .g .</span> - ] - <span class="Comment"># position cursor at top of second page, just below wrapped line</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .g .</span> - <span class="Constant"> .h .</span> - <span class="Constant"> .i .</span> - ] - <span class="Comment"># now move up one line</span> - assume-console [ - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows partial wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .f .</span> - <span class="Constant"> .g .</span> - <span class="Constant"> .h .</span> - ] -] - -<span class="Comment"># check empty lines</span> -<span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-4 [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with some lines around an empty line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> - -c -d -e] - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> - editor-render screen, e - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - ] - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .d .</span> - <span class="Constant"> .e .</span> - <span class="Constant"> .╌╌╌╌╌╌ .</span> - ] - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - ] -] - -<span class="muScenario">scenario</span> editor-scrolls-up-on-left-arrow [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains >3 lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d</span> -<span class="Constant">e]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> - editor-render screen, e - <span class="Comment"># position cursor at top of second page</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - <span class="Constant"> .e .</span> - ] - <span class="Comment"># now try to move left</span> - assume-console [ - press left-arrow - ] - run [ - editor-event-loop screen, console, e - 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> - 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> - ] - <span class="Comment"># screen scrolls</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - ] - memory-should-contain [ - <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> - <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> - ] -] - -<span class="muScenario">scenario</span> editor-can-scroll-up-to-start-of-file [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with >3 lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># position cursor at top of second page, then try to move up to start of</span> - <span class="Comment"># text</span> - assume-console [ - press page-down - press up-arrow - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen slides by one line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># try to move up again</span> - assume-console [ - press up-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen remains unchanged</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] -] - -<span class="Comment"># ctrl-f/page-down - render next page if it exists</span> - -<span class="muScenario">scenario</span> editor-can-scroll [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># scroll down</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows next page</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - page-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">6/ctrl-f</span> - <span class="muControl">break-unless</span> page-down? - old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span class="Constant"> <move-cursor-begin></span> - page-down editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top - <span class="muControl">return</span> movement?/go-render - <span class="Delimiter">}</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - page-down?:bool <span class="Special"><-</span> equal k, <span class="Constant">65518/page-down</span> - <span class="muControl">break-unless</span> page-down? - old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span class="Constant"> <move-cursor-begin></span> - page-down editor - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top - <span class="muControl">return</span> movement?/go-render - <span class="Delimiter">}</span> -] - -<span class="Comment"># page-down skips entire wrapped lines, so it can't scroll past lines</span> -<span class="Comment"># taking up the entire screen</span> -<span class="muRecipe">def</span> page-down editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - <span class="Comment"># if editor contents don't overflow screen, do nothing</span> - bottom-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">bottom-of-screen:offset</span> - <span class="muControl">return-unless</span> bottom-of-screen - <span class="Comment"># if not, position cursor at final character</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - before-cursor:&:duplex-list:char <span class="Special"><-</span> prev bottom-of-screen - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - <span class="Comment"># keep one line in common with previous page</span> - <span class="Delimiter">{</span> - last:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> - newline?:bool <span class="Special"><-</span> equal last, <span class="Constant">10/newline</span> - <span class="muControl">break-unless</span> newline?:bool - before-cursor <span class="Special"><-</span> prev before-cursor - *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor - <span class="Delimiter">}</span> - <span class="Comment"># move cursor and top-of-screen to start of that line</span> - move-to-start-of-line editor - before-cursor <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> - *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, before-cursor -] - -<span class="muScenario">scenario</span> editor-does-not-scroll-past-end [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] - <span class="Comment"># scroll down</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen remains unmodified</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] -] - -<span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains a long last line</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">cdefgh]</span> - <span class="Comment"># editor screen triggers wrap of last line</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> - editor-render screen, e - <span class="Comment"># some part of last line is not displayed</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .cde↩ .</span> - ] - <span class="Comment"># scroll down</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows entire wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .cde↩ .</span> - <span class="Constant"> .fgh .</span> - <span class="Constant"> .╌╌╌╌ .</span> - ] -] - -<span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line-2 [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> - <span class="Comment"># and still has something left over</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">bcdefgh]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> - editor-render screen, e - <span class="Comment"># some part of last line is not displayed</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .bcd↩ .</span> - <span class="Constant"> .efg↩ .</span> - ] - <span class="Comment"># scroll down</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows entire wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .bcd↩ .</span> - <span class="Constant"> .efg↩ .</span> - <span class="Constant"> .h .</span> - ] -] - -<span class="Comment"># ctrl-b/page-up - render previous page if it exists</span> - -<span class="muScenario">scenario</span> editor-can-scroll-up [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># scroll down</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows next page</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> -<span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> - ] - <span class="Comment"># scroll back up</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows original page again</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ - <span class="Delimiter">{</span> - page-up?:bool <span class="Special"><-</span> equal c, <span class="Constant">2/ctrl-b</span> - <span class="muControl">break-unless</span> page-up? - old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span class="Constant"> <move-cursor-begin></span> - editor <span class="Special"><-</span> page-up editor, screen-height - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top - <span class="muControl">return</span> movement?/go-render - <span class="Delimiter">}</span> -] - -<span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ - <span class="Delimiter">{</span> - page-up?:bool <span class="Special"><-</span> equal k, <span class="Constant">65519/page-up</span> - <span class="muControl">break-unless</span> page-up? - old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span class="Constant"> <move-cursor-begin></span> - editor <span class="Special"><-</span> page-up editor, screen-height - undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span class="Constant"> <move-cursor-end></span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top - <span class="Comment"># don't bother re-rendering if nothing changed. todo: test this</span> - <span class="muControl">return</span> movement?/go-render - <span class="Delimiter">}</span> -] - -<span class="muRecipe">def</span> page-up editor:&:editor, screen-height:num<span class="muRecipe"> -> </span>editor:&:editor [ - <span class="Constant">local-scope</span> - <span class="Constant">load-ingredients</span> - max:num <span class="Special"><-</span> subtract screen-height, <span class="Constant">1/menu-bar</span>, <span class="Constant">1/overlapping-line</span> - count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> - top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> - <span class="Delimiter">{</span> - done?:bool <span class="Special"><-</span> greater-or-equal count, max - <span class="muControl">break-if</span> done? - prev:&:duplex-list:char <span class="Special"><-</span> before-previous-line top-of-screen, editor - <span class="muControl">break-unless</span> prev - top-of-screen <span class="Special"><-</span> copy prev - *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen - count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> - <span class="muControl">loop</span> - <span class="Delimiter">}</span> -] - -<span class="muScenario">scenario</span> editor-can-scroll-up-multiple-pages [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># initialize editor with 8 lines</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">c</span> -<span class="Constant">d</span> -<span class="Constant">e</span> -<span class="Constant">f</span> -<span class="Constant">g</span> -<span class="Constant">h]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] - <span class="Comment"># scroll down two pages</span> - assume-console [ - press page-down - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows third page</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .e .</span> - <span class="Constant"> .f .</span> - <span class="Constant"> .g .</span> - ] - <span class="Comment"># scroll up</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows second page</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .c .</span> - <span class="Constant"> .d .</span> - <span class="Constant"> .e .</span> - ] - <span class="Comment"># scroll up again</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows original page again</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .c .</span> - ] -] - -<span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 5 lines for text</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">6/height</span> - <span class="Comment"># editor contains a long line in the first page</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">b</span> -<span class="Constant">cdefgh</span> -<span class="Constant">i</span> -<span class="Constant">j</span> -<span class="Constant">k</span> -<span class="Constant">l</span> -<span class="Constant">m</span> -<span class="Constant">n</span> -<span class="Constant">o]</span> - <span class="Comment"># editor screen triggers wrap of last line</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> - editor-render screen, e - <span class="Comment"># some part of last line is not displayed</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .cde↩ .</span> - <span class="Constant"> .fgh .</span> - <span class="Constant"> .i .</span> - ] - <span class="Comment"># scroll down a page and a line</span> - assume-console [ - press page-down - left-click<span class="Constant"> 5</span>,<span class="Constant"> 0</span> - press down-arrow - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows entire wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .j .</span> - <span class="Constant"> .k .</span> - <span class="Constant"> .l .</span> - <span class="Constant"> .m .</span> - <span class="Constant"> .n .</span> - ] - <span class="Comment"># now scroll up one page</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen resets</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .b .</span> - <span class="Constant"> .cde↩ .</span> - <span class="Constant"> .fgh .</span> - <span class="Constant"> .i .</span> - <span class="Constant"> .j .</span> - ] -] - -<span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines-2 [ - <span class="Constant">local-scope</span> - <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> - <span class="Comment"># and still has something left over</span> - s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span class="Constant">bcdefgh]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> - editor-render screen, e - <span class="Comment"># some part of last line is not displayed</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .bcd↩ .</span> - <span class="Constant"> .efg↩ .</span> - ] - <span class="Comment"># scroll down</span> - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen shows entire wrapped line</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .bcd↩ .</span> - <span class="Constant"> .efg↩ .</span> - <span class="Constant"> .h .</span> - ] - <span class="Comment"># scroll back up</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - <span class="Comment"># screen resets</span> - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .a .</span> - <span class="Constant"> .bcd↩ .</span> - <span class="Constant"> .efg↩ .</span> - ] -] - -<span class="muScenario">scenario</span> editor-can-scroll-up-past-nonempty-lines [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># text with empty line in second screen</span> - s:text <span class="Special"><-</span> new <span class="Constant">[axx</span> -<span class="Constant">bxx</span> -<span class="Constant">cxx</span> -<span class="Constant">dxx</span> -<span class="Constant">exx</span> -<span class="Constant">fxx</span> -<span class="Constant">gxx</span> -<span class="Constant">hxx</span> -<span class="Constant">]</span> - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .axx .</span> - <span class="Constant"> .bxx .</span> - <span class="Constant"> .cxx .</span> - ] - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .cxx .</span> - <span class="Constant"> .dxx .</span> - <span class="Constant"> .exx .</span> - ] - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .exx .</span> - <span class="Constant"> .fxx .</span> - <span class="Constant"> .gxx .</span> - ] - <span class="Comment"># scroll back up past empty line</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .cxx .</span> - <span class="Constant"> .dxx .</span> - <span class="Constant"> .exx .</span> - ] -] - -<span class="muScenario">scenario</span> editor-can-scroll-up-past-empty-lines [ - <span class="Constant">local-scope</span> - assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> - <span class="Comment"># text with empty line in second screen</span> - s:text <span class="Special"><-</span> new <span class="Constant">[axy</span> -<span class="Constant">bxy</span> -<span class="Constant">cxy</span> - -dxy -exy -fxy -gxy -] - e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> - editor-render screen, e - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .axy .</span> - <span class="Constant"> .bxy .</span> - <span class="Constant"> .cxy .</span> - ] - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .cxy .</span> - <span class="Constant"> . .</span> - <span class="Constant"> .dxy .</span> - ] - assume-console [ - press page-down - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .dxy .</span> - <span class="Constant"> .exy .</span> - <span class="Constant"> .fxy .</span> - ] - <span class="Comment"># scroll back up past empty line</span> - assume-console [ - press page-up - ] - run [ - editor-event-loop screen, console, e - ] - screen-should-contain [ - <span class="Constant"> . .</span> - <span class="Constant"> .cxy .</span> - <span class="Constant"> . .</span> - <span class="Constant"> .dxy .</span> - ] -] +<a name="L1"></a><span id="L1" class="LineNr"> 1 </span><span class="SalientComment">## special shortcuts for manipulating the editor</span> +<a name="L2"></a><span id="L2" class="LineNr"> 2 </span><span class="Comment"># Some keys on the keyboard generate unicode characters, others generate</span> +<a name="L3"></a><span id="L3" class="LineNr"> 3 </span><span class="Comment"># terminfo key codes. We need to modify different places in the two cases.</span> +<a name="L4"></a><span id="L4" class="LineNr"> 4 </span> +<a name="L5"></a><span id="L5" class="LineNr"> 5 </span><span class="Comment"># tab - insert two spaces</span> +<a name="L6"></a><span id="L6" class="LineNr"> 6 </span> +<a name="L7"></a><span id="L7" class="LineNr"> 7 </span><span class="muScenario">scenario</span> editor-inserts-two-spaces-on-tab [ +<a name="L8"></a><span id="L8" class="LineNr"> 8 </span> <span class="Constant">local-scope</span> +<a name="L9"></a><span id="L9" class="LineNr"> 9 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L10"></a><span id="L10" class="LineNr"> 10 </span> <span class="Comment"># just one character in final line</span> +<a name="L11"></a><span id="L11" class="LineNr"> 11 </span> s:text <span class="Special"><-</span> new <span class="Constant">[ab</span> +<a name="L12"></a><span id="L12" class="LineNr"> 12 </span><span class="Constant">cd]</span> +<a name="L13"></a><span id="L13" class="LineNr"> 13 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L14"></a><span id="L14" class="LineNr"> 14 </span> assume-console [ +<a name="L15"></a><span id="L15" class="LineNr"> 15 </span> press tab +<a name="L16"></a><span id="L16" class="LineNr"> 16 </span> ] +<a name="L17"></a><span id="L17" class="LineNr"> 17 </span> run [ +<a name="L18"></a><span id="L18" class="LineNr"> 18 </span> editor-event-loop screen, console, e +<a name="L19"></a><span id="L19" class="LineNr"> 19 </span> ] +<a name="L20"></a><span id="L20" class="LineNr"> 20 </span> screen-should-contain [ +<a name="L21"></a><span id="L21" class="LineNr"> 21 </span> <span class="Constant"> . .</span> +<a name="L22"></a><span id="L22" class="LineNr"> 22 </span> <span class="Constant"> . ab .</span> +<a name="L23"></a><span id="L23" class="LineNr"> 23 </span> <span class="Constant"> .cd .</span> +<a name="L24"></a><span id="L24" class="LineNr"> 24 </span> ] +<a name="L25"></a><span id="L25" class="LineNr"> 25 </span>] +<a name="L26"></a><span id="L26" class="LineNr"> 26 </span> +<a name="L27"></a><span id="L27" class="LineNr"> 27 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L28"></a><span id="L28" class="LineNr"> 28 </span> <span class="Delimiter">{</span> +<a name="L29"></a><span id="L29" class="LineNr"> 29 </span> tab?:bool <span class="Special"><-</span> equal c, <span class="Constant">9/tab</span> +<a name="L30"></a><span id="L30" class="LineNr"> 30 </span> <span class="muControl">break-unless</span> tab? +<a name="L31"></a><span id="L31" class="LineNr"> 31 </span><span class="Constant"> <insert-character-begin></span> +<a name="L32"></a><span id="L32" class="LineNr"> 32 </span> insert-at-cursor editor, <span class="Constant">32/space</span>, screen +<a name="L33"></a><span id="L33" class="LineNr"> 33 </span> insert-at-cursor editor, <span class="Constant">32/space</span>, screen +<a name="L34"></a><span id="L34" class="LineNr"> 34 </span><span class="Constant"> <insert-character-end></span> +<a name="L35"></a><span id="L35" class="LineNr"> 35 </span> <span class="muControl">return</span> <span class="Constant">1/go-render</span> +<a name="L36"></a><span id="L36" class="LineNr"> 36 </span> <span class="Delimiter">}</span> +<a name="L37"></a><span id="L37" class="LineNr"> 37 </span>] +<a name="L38"></a><span id="L38" class="LineNr"> 38 </span> +<a name="L39"></a><span id="L39" class="LineNr"> 39 </span><span class="Comment"># backspace - delete character before cursor</span> +<a name="L40"></a><span id="L40" class="LineNr"> 40 </span> +<a name="L41"></a><span id="L41" class="LineNr"> 41 </span><span class="muScenario">scenario</span> editor-handles-backspace-key [ +<a name="L42"></a><span id="L42" class="LineNr"> 42 </span> <span class="Constant">local-scope</span> +<a name="L43"></a><span id="L43" class="LineNr"> 43 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L44"></a><span id="L44" class="LineNr"> 44 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L45"></a><span id="L45" class="LineNr"> 45 </span> editor-render screen, e +<a name="L46"></a><span id="L46" class="LineNr"> 46 </span> $clear-trace +<a name="L47"></a><span id="L47" class="LineNr"> 47 </span> assume-console [ +<a name="L48"></a><span id="L48" class="LineNr"> 48 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> +<a name="L49"></a><span id="L49" class="LineNr"> 49 </span> press backspace +<a name="L50"></a><span id="L50" class="LineNr"> 50 </span> ] +<a name="L51"></a><span id="L51" class="LineNr"> 51 </span> run [ +<a name="L52"></a><span id="L52" class="LineNr"> 52 </span> editor-event-loop screen, console, e +<a name="L53"></a><span id="L53" class="LineNr"> 53 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L54"></a><span id="L54" class="LineNr"> 54 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L55"></a><span id="L55" class="LineNr"> 55 </span> ] +<a name="L56"></a><span id="L56" class="LineNr"> 56 </span> screen-should-contain [ +<a name="L57"></a><span id="L57" class="LineNr"> 57 </span> <span class="Constant"> . .</span> +<a name="L58"></a><span id="L58" class="LineNr"> 58 </span> <span class="Constant"> .bc .</span> +<a name="L59"></a><span id="L59" class="LineNr"> 59 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L60"></a><span id="L60" class="LineNr"> 60 </span> <span class="Constant"> . .</span> +<a name="L61"></a><span id="L61" class="LineNr"> 61 </span> ] +<a name="L62"></a><span id="L62" class="LineNr"> 62 </span> memory-should-contain [ +<a name="L63"></a><span id="L63" class="LineNr"> 63 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L64"></a><span id="L64" class="LineNr"> 64 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L65"></a><span id="L65" class="LineNr"> 65 </span> ] +<a name="L66"></a><span id="L66" class="LineNr"> 66 </span> check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> <span class="Comment"># length of original line to overwrite</span> +<a name="L67"></a><span id="L67" class="LineNr"> 67 </span>] +<a name="L68"></a><span id="L68" class="LineNr"> 68 </span> +<a name="L69"></a><span id="L69" class="LineNr"> 69 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L70"></a><span id="L70" class="LineNr"> 70 </span> <span class="Delimiter">{</span> +<a name="L71"></a><span id="L71" class="LineNr"> 71 </span> delete-previous-character?:bool <span class="Special"><-</span> equal c, <span class="Constant">8/backspace</span> +<a name="L72"></a><span id="L72" class="LineNr"> 72 </span> <span class="muControl">break-unless</span> delete-previous-character? +<a name="L73"></a><span id="L73" class="LineNr"> 73 </span><span class="Constant"> <backspace-character-begin></span> +<a name="L74"></a><span id="L74" class="LineNr"> 74 </span> go-render?:bool, backspaced-cell:&:duplex-list:char <span class="Special"><-</span> delete-before-cursor editor, screen +<a name="L75"></a><span id="L75" class="LineNr"> 75 </span><span class="Constant"> <backspace-character-end></span> +<a name="L76"></a><span id="L76" class="LineNr"> 76 </span> <span class="muControl">return</span> +<a name="L77"></a><span id="L77" class="LineNr"> 77 </span> <span class="Delimiter">}</span> +<a name="L78"></a><span id="L78" class="LineNr"> 78 </span>] +<a name="L79"></a><span id="L79" class="LineNr"> 79 </span> +<a name="L80"></a><span id="L80" class="LineNr"> 80 </span><span class="Comment"># return values:</span> +<a name="L81"></a><span id="L81" class="LineNr"> 81 </span><span class="Comment"># go-render? - whether caller needs to update the screen</span> +<a name="L82"></a><span id="L82" class="LineNr"> 82 </span><span class="Comment"># backspaced-cell - value deleted (or 0 if nothing was deleted) so we can save it for undo, etc.</span> +<a name="L83"></a><span id="L83" class="LineNr"> 83 </span><span class="muRecipe">def</span> delete-before-cursor editor:&:editor, screen:&:screen<span class="muRecipe"> -> </span>go-render?:bool, backspaced-cell:&:duplex-list:char, editor:&:editor, screen:&:screen [ +<a name="L84"></a><span id="L84" class="LineNr"> 84 </span> <span class="Constant">local-scope</span> +<a name="L85"></a><span id="L85" class="LineNr"> 85 </span> <span class="Constant">load-ingredients</span> +<a name="L86"></a><span id="L86" class="LineNr"> 86 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L87"></a><span id="L87" class="LineNr"> 87 </span> data:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<a name="L88"></a><span id="L88" class="LineNr"> 88 </span> <span class="Comment"># if at start of text (before-cursor at § sentinel), return</span> +<a name="L89"></a><span id="L89" class="LineNr"> 89 </span> prev:&:duplex-list:char <span class="Special"><-</span> prev before-cursor +<a name="L90"></a><span id="L90" class="LineNr"> 90 </span> <span class="muControl">return-unless</span> prev, <span class="Constant">0/no-more-render</span>, <span class="Constant">0/nothing-deleted</span> +<a name="L91"></a><span id="L91" class="LineNr"> 91 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[delete-before-cursor]</span> +<a name="L92"></a><span id="L92" class="LineNr"> 92 </span> original-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L93"></a><span id="L93" class="LineNr"> 93 </span> scroll?:bool <span class="Special"><-</span> move-cursor-coordinates-left editor +<a name="L94"></a><span id="L94" class="LineNr"> 94 </span> backspaced-cell:&:duplex-list:char <span class="Special"><-</span> copy before-cursor +<a name="L95"></a><span id="L95" class="LineNr"> 95 </span> data <span class="Special"><-</span> remove before-cursor, data <span class="Comment"># will also neatly trim next/prev pointers in backspaced-cell/before-cursor</span> +<a name="L96"></a><span id="L96" class="LineNr"> 96 </span> before-cursor <span class="Special"><-</span> copy prev +<a name="L97"></a><span id="L97" class="LineNr"> 97 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L98"></a><span id="L98" class="LineNr"> 98 </span> <span class="muControl">return-if</span> scroll?, <span class="Constant">1/go-render</span> +<a name="L99"></a><span id="L99" class="LineNr"> 99 </span> screen-width:num <span class="Special"><-</span> screen-width screen +<a name="L100"></a><span id="L100" class="LineNr"> 100 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L101"></a><span id="L101" class="LineNr"> 101 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L102"></a><span id="L102" class="LineNr"> 102 </span> <span class="Comment"># did we just backspace over a newline?</span> +<a name="L103"></a><span id="L103" class="LineNr"> 103 </span> same-row?:bool <span class="Special"><-</span> equal cursor-row, original-row +<a name="L104"></a><span id="L104" class="LineNr"> 104 </span> <span class="muControl">return-unless</span> same-row?, <span class="Constant">1/go-render</span> +<a name="L105"></a><span id="L105" class="LineNr"> 105 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L106"></a><span id="L106" class="LineNr"> 106 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L107"></a><span id="L107" class="LineNr"> 107 </span> curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L108"></a><span id="L108" class="LineNr"> 108 </span> screen <span class="Special"><-</span> move-cursor screen, cursor-row, cursor-column +<a name="L109"></a><span id="L109" class="LineNr"> 109 </span> curr-column:num <span class="Special"><-</span> copy cursor-column +<a name="L110"></a><span id="L110" class="LineNr"> 110 </span> <span class="Delimiter">{</span> +<a name="L111"></a><span id="L111" class="LineNr"> 111 </span> <span class="Comment"># hit right margin? give up and let caller render</span> +<a name="L112"></a><span id="L112" class="LineNr"> 112 </span> at-right?:bool <span class="Special"><-</span> greater-or-equal curr-column, right +<a name="L113"></a><span id="L113" class="LineNr"> 113 </span> <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span> +<a name="L114"></a><span id="L114" class="LineNr"> 114 </span> <span class="muControl">break-unless</span> curr +<a name="L115"></a><span id="L115" class="LineNr"> 115 </span> <span class="Comment"># newline? done.</span> +<a name="L116"></a><span id="L116" class="LineNr"> 116 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L117"></a><span id="L117" class="LineNr"> 117 </span> at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> +<a name="L118"></a><span id="L118" class="LineNr"> 118 </span> <span class="muControl">break-if</span> at-newline? +<a name="L119"></a><span id="L119" class="LineNr"> 119 </span> screen <span class="Special"><-</span> print screen, currc +<a name="L120"></a><span id="L120" class="LineNr"> 120 </span> curr-column <span class="Special"><-</span> add curr-column,<span class="Constant"> 1</span> +<a name="L121"></a><span id="L121" class="LineNr"> 121 </span> curr <span class="Special"><-</span> next curr +<a name="L122"></a><span id="L122" class="LineNr"> 122 </span> <span class="muControl">loop</span> +<a name="L123"></a><span id="L123" class="LineNr"> 123 </span> <span class="Delimiter">}</span> +<a name="L124"></a><span id="L124" class="LineNr"> 124 </span> <span class="Comment"># we're guaranteed not to be at the right margin</span> +<a name="L125"></a><span id="L125" class="LineNr"> 125 </span> space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span> +<a name="L126"></a><span id="L126" class="LineNr"> 126 </span> screen <span class="Special"><-</span> print screen, space +<a name="L127"></a><span id="L127" class="LineNr"> 127 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<a name="L128"></a><span id="L128" class="LineNr"> 128 </span>] +<a name="L129"></a><span id="L129" class="LineNr"> 129 </span> +<a name="L130"></a><span id="L130" class="LineNr"> 130 </span><span class="muRecipe">def</span> move-cursor-coordinates-left editor:&:editor<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ +<a name="L131"></a><span id="L131" class="LineNr"> 131 </span> <span class="Constant">local-scope</span> +<a name="L132"></a><span id="L132" class="LineNr"> 132 </span> <span class="Constant">load-ingredients</span> +<a name="L133"></a><span id="L133" class="LineNr"> 133 </span> go-render?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<a name="L134"></a><span id="L134" class="LineNr"> 134 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L135"></a><span id="L135" class="LineNr"> 135 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L136"></a><span id="L136" class="LineNr"> 136 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L137"></a><span id="L137" class="LineNr"> 137 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L138"></a><span id="L138" class="LineNr"> 138 </span> <span class="Comment"># if not at left margin, move one character left</span> +<a name="L139"></a><span id="L139" class="LineNr"> 139 </span> <span class="Delimiter">{</span> +<a name="L140"></a><span id="L140" class="LineNr"> 140 </span> at-left-margin?:bool <span class="Special"><-</span> equal cursor-column, left +<a name="L141"></a><span id="L141" class="LineNr"> 141 </span> <span class="muControl">break-if</span> at-left-margin? +<a name="L142"></a><span id="L142" class="LineNr"> 142 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[decrementing cursor column]</span> +<a name="L143"></a><span id="L143" class="LineNr"> 143 </span> cursor-column <span class="Special"><-</span> subtract cursor-column,<span class="Constant"> 1</span> +<a name="L144"></a><span id="L144" class="LineNr"> 144 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L145"></a><span id="L145" class="LineNr"> 145 </span> <span class="muControl">return</span> +<a name="L146"></a><span id="L146" class="LineNr"> 146 </span> <span class="Delimiter">}</span> +<a name="L147"></a><span id="L147" class="LineNr"> 147 </span> <span class="Comment"># if at left margin, we must move to previous row:</span> +<a name="L148"></a><span id="L148" class="LineNr"> 148 </span> top-of-screen?:bool <span class="Special"><-</span> equal cursor-row,<span class="Constant"> 1</span> <span class="Comment"># exclude menu bar</span> +<a name="L149"></a><span id="L149" class="LineNr"> 149 </span> <span class="Delimiter">{</span> +<a name="L150"></a><span id="L150" class="LineNr"> 150 </span> <span class="muControl">break-if</span> top-of-screen? +<a name="L151"></a><span id="L151" class="LineNr"> 151 </span> cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> +<a name="L152"></a><span id="L152" class="LineNr"> 152 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L153"></a><span id="L153" class="LineNr"> 153 </span> <span class="Delimiter">}</span> +<a name="L154"></a><span id="L154" class="LineNr"> 154 </span> <span class="Delimiter">{</span> +<a name="L155"></a><span id="L155" class="LineNr"> 155 </span> <span class="muControl">break-unless</span> top-of-screen? +<a name="L156"></a><span id="L156" class="LineNr"> 156 </span><span class="Constant"> <scroll-up></span> +<a name="L157"></a><span id="L157" class="LineNr"> 157 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">1/true</span> +<a name="L158"></a><span id="L158" class="LineNr"> 158 </span> <span class="Delimiter">}</span> +<a name="L159"></a><span id="L159" class="LineNr"> 159 </span> <span class="Delimiter">{</span> +<a name="L160"></a><span id="L160" class="LineNr"> 160 </span> <span class="Comment"># case 1: if previous character was newline, figure out how long the previous line is</span> +<a name="L161"></a><span id="L161" class="LineNr"> 161 </span> previous-character:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> +<a name="L162"></a><span id="L162" class="LineNr"> 162 </span> previous-character-is-newline?:bool <span class="Special"><-</span> equal previous-character, <span class="Constant">10/newline</span> +<a name="L163"></a><span id="L163" class="LineNr"> 163 </span> <span class="muControl">break-unless</span> previous-character-is-newline? +<a name="L164"></a><span id="L164" class="LineNr"> 164 </span> <span class="Comment"># compute length of previous line</span> +<a name="L165"></a><span id="L165" class="LineNr"> 165 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[switching to previous line]</span> +<a name="L166"></a><span id="L166" class="LineNr"> 166 </span> d:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<a name="L167"></a><span id="L167" class="LineNr"> 167 </span> end-of-line:num <span class="Special"><-</span> previous-line-length before-cursor, d +<a name="L168"></a><span id="L168" class="LineNr"> 168 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L169"></a><span id="L169" class="LineNr"> 169 </span> width:num <span class="Special"><-</span> subtract right, left +<a name="L170"></a><span id="L170" class="LineNr"> 170 </span> wrap?:bool <span class="Special"><-</span> greater-than end-of-line, width +<a name="L171"></a><span id="L171" class="LineNr"> 171 </span> <span class="Delimiter">{</span> +<a name="L172"></a><span id="L172" class="LineNr"> 172 </span> <span class="muControl">break-unless</span> wrap? +<a name="L173"></a><span id="L173" class="LineNr"> 173 </span> _, column-offset:num <span class="Special"><-</span> divide-with-remainder end-of-line, width +<a name="L174"></a><span id="L174" class="LineNr"> 174 </span> cursor-column <span class="Special"><-</span> add left, column-offset +<a name="L175"></a><span id="L175" class="LineNr"> 175 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L176"></a><span id="L176" class="LineNr"> 176 </span> <span class="Delimiter">}</span> +<a name="L177"></a><span id="L177" class="LineNr"> 177 </span> <span class="Delimiter">{</span> +<a name="L178"></a><span id="L178" class="LineNr"> 178 </span> <span class="muControl">break-if</span> wrap? +<a name="L179"></a><span id="L179" class="LineNr"> 179 </span> cursor-column <span class="Special"><-</span> add left, end-of-line +<a name="L180"></a><span id="L180" class="LineNr"> 180 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L181"></a><span id="L181" class="LineNr"> 181 </span> <span class="Delimiter">}</span> +<a name="L182"></a><span id="L182" class="LineNr"> 182 </span> <span class="muControl">return</span> +<a name="L183"></a><span id="L183" class="LineNr"> 183 </span> <span class="Delimiter">}</span> +<a name="L184"></a><span id="L184" class="LineNr"> 184 </span> <span class="Comment"># case 2: if previous-character was not newline, we're just at a wrapped line</span> +<a name="L185"></a><span id="L185" class="LineNr"> 185 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[wrapping to previous line]</span> +<a name="L186"></a><span id="L186" class="LineNr"> 186 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L187"></a><span id="L187" class="LineNr"> 187 </span> cursor-column <span class="Special"><-</span> subtract right,<span class="Constant"> 1</span> <span class="Comment"># leave room for wrap icon</span> +<a name="L188"></a><span id="L188" class="LineNr"> 188 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L189"></a><span id="L189" class="LineNr"> 189 </span>] +<a name="L190"></a><span id="L190" class="LineNr"> 190 </span> +<a name="L191"></a><span id="L191" class="LineNr"> 191 </span><span class="Comment"># takes a pointer 'curr' into the doubly-linked list and its sentinel, counts</span> +<a name="L192"></a><span id="L192" class="LineNr"> 192 </span><span class="Comment"># the length of the previous line before the 'curr' pointer.</span> +<a name="L193"></a><span id="L193" class="LineNr"> 193 </span><span class="muRecipe">def</span> previous-line-length curr:&:duplex-list:char, start:&:duplex-list:char<span class="muRecipe"> -> </span>result:num [ +<a name="L194"></a><span id="L194" class="LineNr"> 194 </span> <span class="Constant">local-scope</span> +<a name="L195"></a><span id="L195" class="LineNr"> 195 </span> <span class="Constant">load-ingredients</span> +<a name="L196"></a><span id="L196" class="LineNr"> 196 </span> result:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<a name="L197"></a><span id="L197" class="LineNr"> 197 </span> <span class="muControl">return-unless</span> curr +<a name="L198"></a><span id="L198" class="LineNr"> 198 </span> at-start?:bool <span class="Special"><-</span> equal curr, start +<a name="L199"></a><span id="L199" class="LineNr"> 199 </span> <span class="muControl">return-if</span> at-start? +<a name="L200"></a><span id="L200" class="LineNr"> 200 </span> <span class="Delimiter">{</span> +<a name="L201"></a><span id="L201" class="LineNr"> 201 </span> curr <span class="Special"><-</span> prev curr +<a name="L202"></a><span id="L202" class="LineNr"> 202 </span> <span class="muControl">break-unless</span> curr +<a name="L203"></a><span id="L203" class="LineNr"> 203 </span> at-start?:bool <span class="Special"><-</span> equal curr, start +<a name="L204"></a><span id="L204" class="LineNr"> 204 </span> <span class="muControl">break-if</span> at-start? +<a name="L205"></a><span id="L205" class="LineNr"> 205 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L206"></a><span id="L206" class="LineNr"> 206 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> +<a name="L207"></a><span id="L207" class="LineNr"> 207 </span> <span class="muControl">break-if</span> at-newline? +<a name="L208"></a><span id="L208" class="LineNr"> 208 </span> result <span class="Special"><-</span> add result,<span class="Constant"> 1</span> +<a name="L209"></a><span id="L209" class="LineNr"> 209 </span> <span class="muControl">loop</span> +<a name="L210"></a><span id="L210" class="LineNr"> 210 </span> <span class="Delimiter">}</span> +<a name="L211"></a><span id="L211" class="LineNr"> 211 </span>] +<a name="L212"></a><span id="L212" class="LineNr"> 212 </span> +<a name="L213"></a><span id="L213" class="LineNr"> 213 </span><span class="muScenario">scenario</span> editor-clears-last-line-on-backspace [ +<a name="L214"></a><span id="L214" class="LineNr"> 214 </span> <span class="Constant">local-scope</span> +<a name="L215"></a><span id="L215" class="LineNr"> 215 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L216"></a><span id="L216" class="LineNr"> 216 </span> <span class="Comment"># just one character in final line</span> +<a name="L217"></a><span id="L217" class="LineNr"> 217 </span> s:text <span class="Special"><-</span> new <span class="Constant">[ab</span> +<a name="L218"></a><span id="L218" class="LineNr"> 218 </span><span class="Constant">cd]</span> +<a name="L219"></a><span id="L219" class="LineNr"> 219 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L220"></a><span id="L220" class="LineNr"> 220 </span> assume-console [ +<a name="L221"></a><span id="L221" class="LineNr"> 221 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> <span class="Comment"># cursor at only character in final line</span> +<a name="L222"></a><span id="L222" class="LineNr"> 222 </span> press backspace +<a name="L223"></a><span id="L223" class="LineNr"> 223 </span> ] +<a name="L224"></a><span id="L224" class="LineNr"> 224 </span> run [ +<a name="L225"></a><span id="L225" class="LineNr"> 225 </span> editor-event-loop screen, console, e +<a name="L226"></a><span id="L226" class="LineNr"> 226 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L227"></a><span id="L227" class="LineNr"> 227 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L228"></a><span id="L228" class="LineNr"> 228 </span> ] +<a name="L229"></a><span id="L229" class="LineNr"> 229 </span> screen-should-contain [ +<a name="L230"></a><span id="L230" class="LineNr"> 230 </span> <span class="Constant"> . .</span> +<a name="L231"></a><span id="L231" class="LineNr"> 231 </span> <span class="Constant"> .abcd .</span> +<a name="L232"></a><span id="L232" class="LineNr"> 232 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L233"></a><span id="L233" class="LineNr"> 233 </span> <span class="Constant"> . .</span> +<a name="L234"></a><span id="L234" class="LineNr"> 234 </span> ] +<a name="L235"></a><span id="L235" class="LineNr"> 235 </span> memory-should-contain [ +<a name="L236"></a><span id="L236" class="LineNr"> 236 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L237"></a><span id="L237" class="LineNr"> 237 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L238"></a><span id="L238" class="LineNr"> 238 </span> ] +<a name="L239"></a><span id="L239" class="LineNr"> 239 </span>] +<a name="L240"></a><span id="L240" class="LineNr"> 240 </span> +<a name="L241"></a><span id="L241" class="LineNr"> 241 </span><span class="muScenario">scenario</span> editor-joins-and-wraps-lines-on-backspace [ +<a name="L242"></a><span id="L242" class="LineNr"> 242 </span> <span class="Constant">local-scope</span> +<a name="L243"></a><span id="L243" class="LineNr"> 243 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L244"></a><span id="L244" class="LineNr"> 244 </span> <span class="Comment"># initialize editor with two long-ish but non-wrapping lines</span> +<a name="L245"></a><span id="L245" class="LineNr"> 245 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc def</span> +<a name="L246"></a><span id="L246" class="LineNr"> 246 </span><span class="Constant">ghi jkl]</span> +<a name="L247"></a><span id="L247" class="LineNr"> 247 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L248"></a><span id="L248" class="LineNr"> 248 </span> editor-render screen, e +<a name="L249"></a><span id="L249" class="LineNr"> 249 </span> $clear-trace +<a name="L250"></a><span id="L250" class="LineNr"> 250 </span> <span class="Comment"># position the cursor at the start of the second and hit backspace</span> +<a name="L251"></a><span id="L251" class="LineNr"> 251 </span> assume-console [ +<a name="L252"></a><span id="L252" class="LineNr"> 252 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<a name="L253"></a><span id="L253" class="LineNr"> 253 </span> press backspace +<a name="L254"></a><span id="L254" class="LineNr"> 254 </span> ] +<a name="L255"></a><span id="L255" class="LineNr"> 255 </span> run [ +<a name="L256"></a><span id="L256" class="LineNr"> 256 </span> editor-event-loop screen, console, e +<a name="L257"></a><span id="L257" class="LineNr"> 257 </span> ] +<a name="L258"></a><span id="L258" class="LineNr"> 258 </span> <span class="Comment"># resulting single line should wrap correctly</span> +<a name="L259"></a><span id="L259" class="LineNr"> 259 </span> screen-should-contain [ +<a name="L260"></a><span id="L260" class="LineNr"> 260 </span> <span class="Constant"> . .</span> +<a name="L261"></a><span id="L261" class="LineNr"> 261 </span> <span class="Constant"> .abc defgh↩.</span> +<a name="L262"></a><span id="L262" class="LineNr"> 262 </span> <span class="Constant"> .i jkl .</span> +<a name="L263"></a><span id="L263" class="LineNr"> 263 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L264"></a><span id="L264" class="LineNr"> 264 </span> <span class="Constant"> . .</span> +<a name="L265"></a><span id="L265" class="LineNr"> 265 </span> ] +<a name="L266"></a><span id="L266" class="LineNr"> 266 </span>] +<a name="L267"></a><span id="L267" class="LineNr"> 267 </span> +<a name="L268"></a><span id="L268" class="LineNr"> 268 </span><span class="muScenario">scenario</span> editor-wraps-long-lines-on-backspace [ +<a name="L269"></a><span id="L269" class="LineNr"> 269 </span> <span class="Constant">local-scope</span> +<a name="L270"></a><span id="L270" class="LineNr"> 270 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L271"></a><span id="L271" class="LineNr"> 271 </span> <span class="Comment"># initialize editor in part of the screen with a long line</span> +<a name="L272"></a><span id="L272" class="LineNr"> 272 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc def ghij]</span>, <span class="Constant">0/left</span>, <span class="Constant">8/right</span> +<a name="L273"></a><span id="L273" class="LineNr"> 273 </span> editor-render screen, e +<a name="L274"></a><span id="L274" class="LineNr"> 274 </span> <span class="Comment"># confirm that it wraps</span> +<a name="L275"></a><span id="L275" class="LineNr"> 275 </span> screen-should-contain [ +<a name="L276"></a><span id="L276" class="LineNr"> 276 </span> <span class="Constant"> . .</span> +<a name="L277"></a><span id="L277" class="LineNr"> 277 </span> <span class="Constant"> .abc def↩ .</span> +<a name="L278"></a><span id="L278" class="LineNr"> 278 </span> <span class="Constant"> . ghij .</span> +<a name="L279"></a><span id="L279" class="LineNr"> 279 </span> <span class="Constant"> .╌╌╌╌╌╌╌╌ .</span> +<a name="L280"></a><span id="L280" class="LineNr"> 280 </span> ] +<a name="L281"></a><span id="L281" class="LineNr"> 281 </span> $clear-trace +<a name="L282"></a><span id="L282" class="LineNr"> 282 </span> <span class="Comment"># position the cursor somewhere in the middle of the top screen line and hit backspace</span> +<a name="L283"></a><span id="L283" class="LineNr"> 283 </span> assume-console [ +<a name="L284"></a><span id="L284" class="LineNr"> 284 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 4</span> +<a name="L285"></a><span id="L285" class="LineNr"> 285 </span> press backspace +<a name="L286"></a><span id="L286" class="LineNr"> 286 </span> ] +<a name="L287"></a><span id="L287" class="LineNr"> 287 </span> run [ +<a name="L288"></a><span id="L288" class="LineNr"> 288 </span> editor-event-loop screen, console, e +<a name="L289"></a><span id="L289" class="LineNr"> 289 </span> ] +<a name="L290"></a><span id="L290" class="LineNr"> 290 </span> <span class="Comment"># resulting single line should wrap correctly and not overflow its bounds</span> +<a name="L291"></a><span id="L291" class="LineNr"> 291 </span> screen-should-contain [ +<a name="L292"></a><span id="L292" class="LineNr"> 292 </span> <span class="Constant"> . .</span> +<a name="L293"></a><span id="L293" class="LineNr"> 293 </span> <span class="Constant"> .abcdef ↩ .</span> +<a name="L294"></a><span id="L294" class="LineNr"> 294 </span> <span class="Constant"> .ghij .</span> +<a name="L295"></a><span id="L295" class="LineNr"> 295 </span> <span class="Constant"> .╌╌╌╌╌╌╌╌ .</span> +<a name="L296"></a><span id="L296" class="LineNr"> 296 </span> <span class="Constant"> . .</span> +<a name="L297"></a><span id="L297" class="LineNr"> 297 </span> ] +<a name="L298"></a><span id="L298" class="LineNr"> 298 </span>] +<a name="L299"></a><span id="L299" class="LineNr"> 299 </span> +<a name="L300"></a><span id="L300" class="LineNr"> 300 </span><span class="Comment"># delete - delete character at cursor</span> +<a name="L301"></a><span id="L301" class="LineNr"> 301 </span> +<a name="L302"></a><span id="L302" class="LineNr"> 302 </span><span class="muScenario">scenario</span> editor-handles-delete-key [ +<a name="L303"></a><span id="L303" class="LineNr"> 303 </span> <span class="Constant">local-scope</span> +<a name="L304"></a><span id="L304" class="LineNr"> 304 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L305"></a><span id="L305" class="LineNr"> 305 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L306"></a><span id="L306" class="LineNr"> 306 </span> editor-render screen, e +<a name="L307"></a><span id="L307" class="LineNr"> 307 </span> $clear-trace +<a name="L308"></a><span id="L308" class="LineNr"> 308 </span> assume-console [ +<a name="L309"></a><span id="L309" class="LineNr"> 309 </span> press delete +<a name="L310"></a><span id="L310" class="LineNr"> 310 </span> ] +<a name="L311"></a><span id="L311" class="LineNr"> 311 </span> run [ +<a name="L312"></a><span id="L312" class="LineNr"> 312 </span> editor-event-loop screen, console, e +<a name="L313"></a><span id="L313" class="LineNr"> 313 </span> ] +<a name="L314"></a><span id="L314" class="LineNr"> 314 </span> screen-should-contain [ +<a name="L315"></a><span id="L315" class="LineNr"> 315 </span> <span class="Constant"> . .</span> +<a name="L316"></a><span id="L316" class="LineNr"> 316 </span> <span class="Constant"> .bc .</span> +<a name="L317"></a><span id="L317" class="LineNr"> 317 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L318"></a><span id="L318" class="LineNr"> 318 </span> <span class="Constant"> . .</span> +<a name="L319"></a><span id="L319" class="LineNr"> 319 </span> ] +<a name="L320"></a><span id="L320" class="LineNr"> 320 </span> check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> <span class="Comment"># length of original line to overwrite</span> +<a name="L321"></a><span id="L321" class="LineNr"> 321 </span> $clear-trace +<a name="L322"></a><span id="L322" class="LineNr"> 322 </span> assume-console [ +<a name="L323"></a><span id="L323" class="LineNr"> 323 </span> press delete +<a name="L324"></a><span id="L324" class="LineNr"> 324 </span> ] +<a name="L325"></a><span id="L325" class="LineNr"> 325 </span> run [ +<a name="L326"></a><span id="L326" class="LineNr"> 326 </span> editor-event-loop screen, console, e +<a name="L327"></a><span id="L327" class="LineNr"> 327 </span> ] +<a name="L328"></a><span id="L328" class="LineNr"> 328 </span> screen-should-contain [ +<a name="L329"></a><span id="L329" class="LineNr"> 329 </span> <span class="Constant"> . .</span> +<a name="L330"></a><span id="L330" class="LineNr"> 330 </span> <span class="Constant"> .c .</span> +<a name="L331"></a><span id="L331" class="LineNr"> 331 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L332"></a><span id="L332" class="LineNr"> 332 </span> <span class="Constant"> . .</span> +<a name="L333"></a><span id="L333" class="LineNr"> 333 </span> ] +<a name="L334"></a><span id="L334" class="LineNr"> 334 </span> check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span> <span class="Comment"># new length to overwrite</span> +<a name="L335"></a><span id="L335" class="LineNr"> 335 </span>] +<a name="L336"></a><span id="L336" class="LineNr"> 336 </span> +<a name="L337"></a><span id="L337" class="LineNr"> 337 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L338"></a><span id="L338" class="LineNr"> 338 </span> <span class="Delimiter">{</span> +<a name="L339"></a><span id="L339" class="LineNr"> 339 </span> delete-next-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65522/delete</span> +<a name="L340"></a><span id="L340" class="LineNr"> 340 </span> <span class="muControl">break-unless</span> delete-next-character? +<a name="L341"></a><span id="L341" class="LineNr"> 341 </span><span class="Constant"> <delete-character-begin></span> +<a name="L342"></a><span id="L342" class="LineNr"> 342 </span> go-render?:bool, deleted-cell:&:duplex-list:char <span class="Special"><-</span> delete-at-cursor editor, screen +<a name="L343"></a><span id="L343" class="LineNr"> 343 </span><span class="Constant"> <delete-character-end></span> +<a name="L344"></a><span id="L344" class="LineNr"> 344 </span> <span class="muControl">return</span> +<a name="L345"></a><span id="L345" class="LineNr"> 345 </span> <span class="Delimiter">}</span> +<a name="L346"></a><span id="L346" class="LineNr"> 346 </span>] +<a name="L347"></a><span id="L347" class="LineNr"> 347 </span> +<a name="L348"></a><span id="L348" class="LineNr"> 348 </span><span class="muRecipe">def</span> delete-at-cursor editor:&:editor, screen:&:screen<span class="muRecipe"> -> </span>go-render?:bool, deleted-cell:&:duplex-list:char, editor:&:editor, screen:&:screen [ +<a name="L349"></a><span id="L349" class="LineNr"> 349 </span> <span class="Constant">local-scope</span> +<a name="L350"></a><span id="L350" class="LineNr"> 350 </span> <span class="Constant">load-ingredients</span> +<a name="L351"></a><span id="L351" class="LineNr"> 351 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L352"></a><span id="L352" class="LineNr"> 352 </span> data:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<a name="L353"></a><span id="L353" class="LineNr"> 353 </span> deleted-cell:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L354"></a><span id="L354" class="LineNr"> 354 </span> <span class="muControl">return-unless</span> deleted-cell, <span class="Constant">0/don't-render</span> +<a name="L355"></a><span id="L355" class="LineNr"> 355 </span> currc:char <span class="Special"><-</span> get *deleted-cell, <span class="Constant">value:offset</span> +<a name="L356"></a><span id="L356" class="LineNr"> 356 </span> data <span class="Special"><-</span> remove deleted-cell, data +<a name="L357"></a><span id="L357" class="LineNr"> 357 </span> deleted-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> +<a name="L358"></a><span id="L358" class="LineNr"> 358 </span> <span class="muControl">return-if</span> deleted-newline?, <span class="Constant">1/go-render</span> +<a name="L359"></a><span id="L359" class="LineNr"> 359 </span> <span class="Comment"># wasn't a newline? render rest of line</span> +<a name="L360"></a><span id="L360" class="LineNr"> 360 </span> curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor <span class="Comment"># refresh after remove above</span> +<a name="L361"></a><span id="L361" class="LineNr"> 361 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L362"></a><span id="L362" class="LineNr"> 362 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L363"></a><span id="L363" class="LineNr"> 363 </span> screen <span class="Special"><-</span> move-cursor screen, cursor-row, cursor-column +<a name="L364"></a><span id="L364" class="LineNr"> 364 </span> curr-column:num <span class="Special"><-</span> copy cursor-column +<a name="L365"></a><span id="L365" class="LineNr"> 365 </span> screen-width:num <span class="Special"><-</span> screen-width screen +<a name="L366"></a><span id="L366" class="LineNr"> 366 </span> <span class="Delimiter">{</span> +<a name="L367"></a><span id="L367" class="LineNr"> 367 </span> <span class="Comment"># hit right margin? give up and let caller render</span> +<a name="L368"></a><span id="L368" class="LineNr"> 368 </span> at-right?:bool <span class="Special"><-</span> greater-or-equal curr-column, screen-width +<a name="L369"></a><span id="L369" class="LineNr"> 369 </span> <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span> +<a name="L370"></a><span id="L370" class="LineNr"> 370 </span> <span class="muControl">break-unless</span> curr +<a name="L371"></a><span id="L371" class="LineNr"> 371 </span> <span class="Comment"># newline? done.</span> +<a name="L372"></a><span id="L372" class="LineNr"> 372 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L373"></a><span id="L373" class="LineNr"> 373 </span> at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> +<a name="L374"></a><span id="L374" class="LineNr"> 374 </span> <span class="muControl">break-if</span> at-newline? +<a name="L375"></a><span id="L375" class="LineNr"> 375 </span> screen <span class="Special"><-</span> print screen, currc +<a name="L376"></a><span id="L376" class="LineNr"> 376 </span> curr-column <span class="Special"><-</span> add curr-column,<span class="Constant"> 1</span> +<a name="L377"></a><span id="L377" class="LineNr"> 377 </span> curr <span class="Special"><-</span> next curr +<a name="L378"></a><span id="L378" class="LineNr"> 378 </span> <span class="muControl">loop</span> +<a name="L379"></a><span id="L379" class="LineNr"> 379 </span> <span class="Delimiter">}</span> +<a name="L380"></a><span id="L380" class="LineNr"> 380 </span> <span class="Comment"># we're guaranteed not to be at the right margin</span> +<a name="L381"></a><span id="L381" class="LineNr"> 381 </span> space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span> +<a name="L382"></a><span id="L382" class="LineNr"> 382 </span> screen <span class="Special"><-</span> print screen, space +<a name="L383"></a><span id="L383" class="LineNr"> 383 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<a name="L384"></a><span id="L384" class="LineNr"> 384 </span>] +<a name="L385"></a><span id="L385" class="LineNr"> 385 </span> +<a name="L386"></a><span id="L386" class="LineNr"> 386 </span><span class="Comment"># right arrow</span> +<a name="L387"></a><span id="L387" class="LineNr"> 387 </span> +<a name="L388"></a><span id="L388" class="LineNr"> 388 </span><span class="muScenario">scenario</span> editor-moves-cursor-right-with-key [ +<a name="L389"></a><span id="L389" class="LineNr"> 389 </span> <span class="Constant">local-scope</span> +<a name="L390"></a><span id="L390" class="LineNr"> 390 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L391"></a><span id="L391" class="LineNr"> 391 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L392"></a><span id="L392" class="LineNr"> 392 </span> editor-render screen, e +<a name="L393"></a><span id="L393" class="LineNr"> 393 </span> $clear-trace +<a name="L394"></a><span id="L394" class="LineNr"> 394 </span> assume-console [ +<a name="L395"></a><span id="L395" class="LineNr"> 395 </span> press right-arrow +<a name="L396"></a><span id="L396" class="LineNr"> 396 </span> type <span class="Constant">[0]</span> +<a name="L397"></a><span id="L397" class="LineNr"> 397 </span> ] +<a name="L398"></a><span id="L398" class="LineNr"> 398 </span> run [ +<a name="L399"></a><span id="L399" class="LineNr"> 399 </span> editor-event-loop screen, console, e +<a name="L400"></a><span id="L400" class="LineNr"> 400 </span> ] +<a name="L401"></a><span id="L401" class="LineNr"> 401 </span> screen-should-contain [ +<a name="L402"></a><span id="L402" class="LineNr"> 402 </span> <span class="Constant"> . .</span> +<a name="L403"></a><span id="L403" class="LineNr"> 403 </span> <span class="Constant"> .a0bc .</span> +<a name="L404"></a><span id="L404" class="LineNr"> 404 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L405"></a><span id="L405" class="LineNr"> 405 </span> <span class="Constant"> . .</span> +<a name="L406"></a><span id="L406" class="LineNr"> 406 </span> ] +<a name="L407"></a><span id="L407" class="LineNr"> 407 </span> check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> <span class="Comment"># 0 and following characters</span> +<a name="L408"></a><span id="L408" class="LineNr"> 408 </span>] +<a name="L409"></a><span id="L409" class="LineNr"> 409 </span> +<a name="L410"></a><span id="L410" class="LineNr"> 410 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L411"></a><span id="L411" class="LineNr"> 411 </span> <span class="Delimiter">{</span> +<a name="L412"></a><span id="L412" class="LineNr"> 412 </span> move-to-next-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65514/right-arrow</span> +<a name="L413"></a><span id="L413" class="LineNr"> 413 </span> <span class="muControl">break-unless</span> move-to-next-character? +<a name="L414"></a><span id="L414" class="LineNr"> 414 </span> <span class="Comment"># if not at end of text</span> +<a name="L415"></a><span id="L415" class="LineNr"> 415 </span> next-cursor:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L416"></a><span id="L416" class="LineNr"> 416 </span> <span class="muControl">break-unless</span> next-cursor +<a name="L417"></a><span id="L417" class="LineNr"> 417 </span> <span class="Comment"># scan to next character</span> +<a name="L418"></a><span id="L418" class="LineNr"> 418 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L419"></a><span id="L419" class="LineNr"> 419 </span> before-cursor <span class="Special"><-</span> copy next-cursor +<a name="L420"></a><span id="L420" class="LineNr"> 420 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L421"></a><span id="L421" class="LineNr"> 421 </span> go-render?:bool <span class="Special"><-</span> move-cursor-coordinates-right editor, screen-height +<a name="L422"></a><span id="L422" class="LineNr"> 422 </span> screen <span class="Special"><-</span> move-cursor screen, cursor-row, cursor-column +<a name="L423"></a><span id="L423" class="LineNr"> 423 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">2/right-arrow</span> +<a name="L424"></a><span id="L424" class="LineNr"> 424 </span><span class="Constant"> <move-cursor-end></span> +<a name="L425"></a><span id="L425" class="LineNr"> 425 </span> <span class="muControl">return</span> +<a name="L426"></a><span id="L426" class="LineNr"> 426 </span> <span class="Delimiter">}</span> +<a name="L427"></a><span id="L427" class="LineNr"> 427 </span>] +<a name="L428"></a><span id="L428" class="LineNr"> 428 </span> +<a name="L429"></a><span id="L429" class="LineNr"> 429 </span><span class="muRecipe">def</span> move-cursor-coordinates-right editor:&:editor, screen-height:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ +<a name="L430"></a><span id="L430" class="LineNr"> 430 </span> <span class="Constant">local-scope</span> +<a name="L431"></a><span id="L431" class="LineNr"> 431 </span> <span class="Constant">load-ingredients</span> +<a name="L432"></a><span id="L432" class="LineNr"> 432 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor <span class="Constant">before-cursor:offset</span> +<a name="L433"></a><span id="L433" class="LineNr"> 433 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L434"></a><span id="L434" class="LineNr"> 434 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L435"></a><span id="L435" class="LineNr"> 435 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L436"></a><span id="L436" class="LineNr"> 436 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L437"></a><span id="L437" class="LineNr"> 437 </span> <span class="Comment"># if crossed a newline, move cursor to start of next row</span> +<a name="L438"></a><span id="L438" class="LineNr"> 438 </span> <span class="Delimiter">{</span> +<a name="L439"></a><span id="L439" class="LineNr"> 439 </span> old-cursor-character:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> +<a name="L440"></a><span id="L440" class="LineNr"> 440 </span> was-at-newline?:bool <span class="Special"><-</span> equal old-cursor-character, <span class="Constant">10/newline</span> +<a name="L441"></a><span id="L441" class="LineNr"> 441 </span> <span class="muControl">break-unless</span> was-at-newline? +<a name="L442"></a><span id="L442" class="LineNr"> 442 </span> cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> +<a name="L443"></a><span id="L443" class="LineNr"> 443 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L444"></a><span id="L444" class="LineNr"> 444 </span> cursor-column <span class="Special"><-</span> copy left +<a name="L445"></a><span id="L445" class="LineNr"> 445 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L446"></a><span id="L446" class="LineNr"> 446 </span> below-screen?:bool <span class="Special"><-</span> greater-or-equal cursor-row, screen-height <span class="Comment"># must be equal</span> +<a name="L447"></a><span id="L447" class="LineNr"> 447 </span> <span class="muControl">return-unless</span> below-screen?, <span class="Constant">0/don't-render</span> +<a name="L448"></a><span id="L448" class="LineNr"> 448 </span><span class="Constant"> <scroll-down></span> +<a name="L449"></a><span id="L449" class="LineNr"> 449 </span> cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> <span class="Comment"># bring back into screen range</span> +<a name="L450"></a><span id="L450" class="LineNr"> 450 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L451"></a><span id="L451" class="LineNr"> 451 </span> <span class="muControl">return</span> <span class="Constant">1/go-render</span> +<a name="L452"></a><span id="L452" class="LineNr"> 452 </span> <span class="Delimiter">}</span> +<a name="L453"></a><span id="L453" class="LineNr"> 453 </span> <span class="Comment"># if the line wraps, move cursor to start of next row</span> +<a name="L454"></a><span id="L454" class="LineNr"> 454 </span> <span class="Delimiter">{</span> +<a name="L455"></a><span id="L455" class="LineNr"> 455 </span> <span class="Comment"># if we're at the column just before the wrap indicator</span> +<a name="L456"></a><span id="L456" class="LineNr"> 456 </span> wrap-column:num <span class="Special"><-</span> subtract right,<span class="Constant"> 1</span> +<a name="L457"></a><span id="L457" class="LineNr"> 457 </span> at-wrap?:bool <span class="Special"><-</span> equal cursor-column, wrap-column +<a name="L458"></a><span id="L458" class="LineNr"> 458 </span> <span class="muControl">break-unless</span> at-wrap? +<a name="L459"></a><span id="L459" class="LineNr"> 459 </span> <span class="Comment"># and if next character isn't newline</span> +<a name="L460"></a><span id="L460" class="LineNr"> 460 </span> next:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L461"></a><span id="L461" class="LineNr"> 461 </span> <span class="muControl">break-unless</span> next +<a name="L462"></a><span id="L462" class="LineNr"> 462 </span> next-character:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> +<a name="L463"></a><span id="L463" class="LineNr"> 463 </span> newline?:bool <span class="Special"><-</span> equal next-character, <span class="Constant">10/newline</span> +<a name="L464"></a><span id="L464" class="LineNr"> 464 </span> <span class="muControl">break-if</span> newline? +<a name="L465"></a><span id="L465" class="LineNr"> 465 </span> cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> +<a name="L466"></a><span id="L466" class="LineNr"> 466 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L467"></a><span id="L467" class="LineNr"> 467 </span> cursor-column <span class="Special"><-</span> copy left +<a name="L468"></a><span id="L468" class="LineNr"> 468 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L469"></a><span id="L469" class="LineNr"> 469 </span> below-screen?:bool <span class="Special"><-</span> greater-or-equal cursor-row, screen-height <span class="Comment"># must be equal</span> +<a name="L470"></a><span id="L470" class="LineNr"> 470 </span> <span class="muControl">return-unless</span> below-screen?, <span class="Constant">0/no-more-render</span> +<a name="L471"></a><span id="L471" class="LineNr"> 471 </span><span class="Constant"> <scroll-down></span> +<a name="L472"></a><span id="L472" class="LineNr"> 472 </span> cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> <span class="Comment"># bring back into screen range</span> +<a name="L473"></a><span id="L473" class="LineNr"> 473 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L474"></a><span id="L474" class="LineNr"> 474 </span> <span class="muControl">return</span> <span class="Constant">1/go-render</span> +<a name="L475"></a><span id="L475" class="LineNr"> 475 </span> <span class="Delimiter">}</span> +<a name="L476"></a><span id="L476" class="LineNr"> 476 </span> <span class="Comment"># otherwise move cursor one character right</span> +<a name="L477"></a><span id="L477" class="LineNr"> 477 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> +<a name="L478"></a><span id="L478" class="LineNr"> 478 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L479"></a><span id="L479" class="LineNr"> 479 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<a name="L480"></a><span id="L480" class="LineNr"> 480 </span>] +<a name="L481"></a><span id="L481" class="LineNr"> 481 </span> +<a name="L482"></a><span id="L482" class="LineNr"> 482 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow [ +<a name="L483"></a><span id="L483" class="LineNr"> 483 </span> <span class="Constant">local-scope</span> +<a name="L484"></a><span id="L484" class="LineNr"> 484 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L485"></a><span id="L485" class="LineNr"> 485 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L486"></a><span id="L486" class="LineNr"> 486 </span><span class="Constant">d]</span> +<a name="L487"></a><span id="L487" class="LineNr"> 487 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L488"></a><span id="L488" class="LineNr"> 488 </span> editor-render screen, e +<a name="L489"></a><span id="L489" class="LineNr"> 489 </span> $clear-trace +<a name="L490"></a><span id="L490" class="LineNr"> 490 </span> <span class="Comment"># type right-arrow a few times to get to start of second line</span> +<a name="L491"></a><span id="L491" class="LineNr"> 491 </span> assume-console [ +<a name="L492"></a><span id="L492" class="LineNr"> 492 </span> press right-arrow +<a name="L493"></a><span id="L493" class="LineNr"> 493 </span> press right-arrow +<a name="L494"></a><span id="L494" class="LineNr"> 494 </span> press right-arrow +<a name="L495"></a><span id="L495" class="LineNr"> 495 </span> press right-arrow <span class="Comment"># next line</span> +<a name="L496"></a><span id="L496" class="LineNr"> 496 </span> ] +<a name="L497"></a><span id="L497" class="LineNr"> 497 </span> run [ +<a name="L498"></a><span id="L498" class="LineNr"> 498 </span> editor-event-loop screen, console, e +<a name="L499"></a><span id="L499" class="LineNr"> 499 </span> ] +<a name="L500"></a><span id="L500" class="LineNr"> 500 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L501"></a><span id="L501" class="LineNr"> 501 </span> <span class="Comment"># type something and ensure it goes where it should</span> +<a name="L502"></a><span id="L502" class="LineNr"> 502 </span> assume-console [ +<a name="L503"></a><span id="L503" class="LineNr"> 503 </span> type <span class="Constant">[0]</span> +<a name="L504"></a><span id="L504" class="LineNr"> 504 </span> ] +<a name="L505"></a><span id="L505" class="LineNr"> 505 </span> run [ +<a name="L506"></a><span id="L506" class="LineNr"> 506 </span> editor-event-loop screen, console, e +<a name="L507"></a><span id="L507" class="LineNr"> 507 </span> ] +<a name="L508"></a><span id="L508" class="LineNr"> 508 </span> screen-should-contain [ +<a name="L509"></a><span id="L509" class="LineNr"> 509 </span> <span class="Constant"> . .</span> +<a name="L510"></a><span id="L510" class="LineNr"> 510 </span> <span class="Constant"> .abc .</span> +<a name="L511"></a><span id="L511" class="LineNr"> 511 </span> <span class="Constant"> .0d .</span> +<a name="L512"></a><span id="L512" class="LineNr"> 512 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L513"></a><span id="L513" class="LineNr"> 513 </span> <span class="Constant"> . .</span> +<a name="L514"></a><span id="L514" class="LineNr"> 514 </span> ] +<a name="L515"></a><span id="L515" class="LineNr"> 515 </span> check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span> <span class="Comment"># new length of second line</span> +<a name="L516"></a><span id="L516" class="LineNr"> 516 </span>] +<a name="L517"></a><span id="L517" class="LineNr"> 517 </span> +<a name="L518"></a><span id="L518" class="LineNr"> 518 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow-2 [ +<a name="L519"></a><span id="L519" class="LineNr"> 519 </span> <span class="Constant">local-scope</span> +<a name="L520"></a><span id="L520" class="LineNr"> 520 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L521"></a><span id="L521" class="LineNr"> 521 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L522"></a><span id="L522" class="LineNr"> 522 </span><span class="Constant">d]</span> +<a name="L523"></a><span id="L523" class="LineNr"> 523 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">1/left</span>, <span class="Constant">10/right</span> +<a name="L524"></a><span id="L524" class="LineNr"> 524 </span> editor-render screen, e +<a name="L525"></a><span id="L525" class="LineNr"> 525 </span> assume-console [ +<a name="L526"></a><span id="L526" class="LineNr"> 526 </span> press right-arrow +<a name="L527"></a><span id="L527" class="LineNr"> 527 </span> press right-arrow +<a name="L528"></a><span id="L528" class="LineNr"> 528 </span> press right-arrow +<a name="L529"></a><span id="L529" class="LineNr"> 529 </span> press right-arrow <span class="Comment"># next line</span> +<a name="L530"></a><span id="L530" class="LineNr"> 530 </span> type <span class="Constant">[0]</span> +<a name="L531"></a><span id="L531" class="LineNr"> 531 </span> ] +<a name="L532"></a><span id="L532" class="LineNr"> 532 </span> run [ +<a name="L533"></a><span id="L533" class="LineNr"> 533 </span> editor-event-loop screen, console, e +<a name="L534"></a><span id="L534" class="LineNr"> 534 </span> ] +<a name="L535"></a><span id="L535" class="LineNr"> 535 </span> screen-should-contain [ +<a name="L536"></a><span id="L536" class="LineNr"> 536 </span> <span class="Constant"> . .</span> +<a name="L537"></a><span id="L537" class="LineNr"> 537 </span> <span class="Constant"> . abc .</span> +<a name="L538"></a><span id="L538" class="LineNr"> 538 </span> <span class="Constant"> . 0d .</span> +<a name="L539"></a><span id="L539" class="LineNr"> 539 </span> <span class="Constant"> . ╌╌╌╌╌╌╌╌╌.</span> +<a name="L540"></a><span id="L540" class="LineNr"> 540 </span> <span class="Constant"> . .</span> +<a name="L541"></a><span id="L541" class="LineNr"> 541 </span> ] +<a name="L542"></a><span id="L542" class="LineNr"> 542 </span>] +<a name="L543"></a><span id="L543" class="LineNr"> 543 </span> +<a name="L544"></a><span id="L544" class="LineNr"> 544 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow [ +<a name="L545"></a><span id="L545" class="LineNr"> 545 </span> <span class="Constant">local-scope</span> +<a name="L546"></a><span id="L546" class="LineNr"> 546 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L547"></a><span id="L547" class="LineNr"> 547 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcdef]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L548"></a><span id="L548" class="LineNr"> 548 </span> editor-render screen, e +<a name="L549"></a><span id="L549" class="LineNr"> 549 </span> $clear-trace +<a name="L550"></a><span id="L550" class="LineNr"> 550 </span> assume-console [ +<a name="L551"></a><span id="L551" class="LineNr"> 551 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L552"></a><span id="L552" class="LineNr"> 552 </span> press right-arrow +<a name="L553"></a><span id="L553" class="LineNr"> 553 </span> ] +<a name="L554"></a><span id="L554" class="LineNr"> 554 </span> run [ +<a name="L555"></a><span id="L555" class="LineNr"> 555 </span> editor-event-loop screen, console, e +<a name="L556"></a><span id="L556" class="LineNr"> 556 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L557"></a><span id="L557" class="LineNr"> 557 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L558"></a><span id="L558" class="LineNr"> 558 </span> ] +<a name="L559"></a><span id="L559" class="LineNr"> 559 </span> screen-should-contain [ +<a name="L560"></a><span id="L560" class="LineNr"> 560 </span> <span class="Constant"> . .</span> +<a name="L561"></a><span id="L561" class="LineNr"> 561 </span> <span class="Constant"> .abcd↩ .</span> +<a name="L562"></a><span id="L562" class="LineNr"> 562 </span> <span class="Constant"> .ef .</span> +<a name="L563"></a><span id="L563" class="LineNr"> 563 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<a name="L564"></a><span id="L564" class="LineNr"> 564 </span> <span class="Constant"> . .</span> +<a name="L565"></a><span id="L565" class="LineNr"> 565 </span> ] +<a name="L566"></a><span id="L566" class="LineNr"> 566 </span> memory-should-contain [ +<a name="L567"></a><span id="L567" class="LineNr"> 567 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L568"></a><span id="L568" class="LineNr"> 568 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L569"></a><span id="L569" class="LineNr"> 569 </span> ] +<a name="L570"></a><span id="L570" class="LineNr"> 570 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L571"></a><span id="L571" class="LineNr"> 571 </span>] +<a name="L572"></a><span id="L572" class="LineNr"> 572 </span> +<a name="L573"></a><span id="L573" class="LineNr"> 573 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow-2 [ +<a name="L574"></a><span id="L574" class="LineNr"> 574 </span> <span class="Constant">local-scope</span> +<a name="L575"></a><span id="L575" class="LineNr"> 575 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L576"></a><span id="L576" class="LineNr"> 576 </span> <span class="Comment"># line just barely wrapping</span> +<a name="L577"></a><span id="L577" class="LineNr"> 577 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcde]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L578"></a><span id="L578" class="LineNr"> 578 </span> editor-render screen, e +<a name="L579"></a><span id="L579" class="LineNr"> 579 </span> $clear-trace +<a name="L580"></a><span id="L580" class="LineNr"> 580 </span> <span class="Comment"># position cursor at last character before wrap and hit right-arrow</span> +<a name="L581"></a><span id="L581" class="LineNr"> 581 </span> assume-console [ +<a name="L582"></a><span id="L582" class="LineNr"> 582 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L583"></a><span id="L583" class="LineNr"> 583 </span> press right-arrow +<a name="L584"></a><span id="L584" class="LineNr"> 584 </span> ] +<a name="L585"></a><span id="L585" class="LineNr"> 585 </span> run [ +<a name="L586"></a><span id="L586" class="LineNr"> 586 </span> editor-event-loop screen, console, e +<a name="L587"></a><span id="L587" class="LineNr"> 587 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L588"></a><span id="L588" class="LineNr"> 588 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L589"></a><span id="L589" class="LineNr"> 589 </span> ] +<a name="L590"></a><span id="L590" class="LineNr"> 590 </span> memory-should-contain [ +<a name="L591"></a><span id="L591" class="LineNr"> 591 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L592"></a><span id="L592" class="LineNr"> 592 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L593"></a><span id="L593" class="LineNr"> 593 </span> ] +<a name="L594"></a><span id="L594" class="LineNr"> 594 </span> <span class="Comment"># now hit right arrow again</span> +<a name="L595"></a><span id="L595" class="LineNr"> 595 </span> assume-console [ +<a name="L596"></a><span id="L596" class="LineNr"> 596 </span> press right-arrow +<a name="L597"></a><span id="L597" class="LineNr"> 597 </span> ] +<a name="L598"></a><span id="L598" class="LineNr"> 598 </span> run [ +<a name="L599"></a><span id="L599" class="LineNr"> 599 </span> editor-event-loop screen, console, e +<a name="L600"></a><span id="L600" class="LineNr"> 600 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L601"></a><span id="L601" class="LineNr"> 601 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L602"></a><span id="L602" class="LineNr"> 602 </span> ] +<a name="L603"></a><span id="L603" class="LineNr"> 603 </span> memory-should-contain [ +<a name="L604"></a><span id="L604" class="LineNr"> 604 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L605"></a><span id="L605" class="LineNr"> 605 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L606"></a><span id="L606" class="LineNr"> 606 </span> ] +<a name="L607"></a><span id="L607" class="LineNr"> 607 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L608"></a><span id="L608" class="LineNr"> 608 </span>] +<a name="L609"></a><span id="L609" class="LineNr"> 609 </span> +<a name="L610"></a><span id="L610" class="LineNr"> 610 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow-3 [ +<a name="L611"></a><span id="L611" class="LineNr"> 611 </span> <span class="Constant">local-scope</span> +<a name="L612"></a><span id="L612" class="LineNr"> 612 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L613"></a><span id="L613" class="LineNr"> 613 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcdef]</span>, <span class="Constant">1/left</span>, <span class="Constant">6/right</span> +<a name="L614"></a><span id="L614" class="LineNr"> 614 </span> editor-render screen, e +<a name="L615"></a><span id="L615" class="LineNr"> 615 </span> $clear-trace +<a name="L616"></a><span id="L616" class="LineNr"> 616 </span> assume-console [ +<a name="L617"></a><span id="L617" class="LineNr"> 617 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 4</span> +<a name="L618"></a><span id="L618" class="LineNr"> 618 </span> press right-arrow +<a name="L619"></a><span id="L619" class="LineNr"> 619 </span> ] +<a name="L620"></a><span id="L620" class="LineNr"> 620 </span> run [ +<a name="L621"></a><span id="L621" class="LineNr"> 621 </span> editor-event-loop screen, console, e +<a name="L622"></a><span id="L622" class="LineNr"> 622 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L623"></a><span id="L623" class="LineNr"> 623 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L624"></a><span id="L624" class="LineNr"> 624 </span> ] +<a name="L625"></a><span id="L625" class="LineNr"> 625 </span> screen-should-contain [ +<a name="L626"></a><span id="L626" class="LineNr"> 626 </span> <span class="Constant"> . .</span> +<a name="L627"></a><span id="L627" class="LineNr"> 627 </span> <span class="Constant"> . abcd↩ .</span> +<a name="L628"></a><span id="L628" class="LineNr"> 628 </span> <span class="Constant"> . ef .</span> +<a name="L629"></a><span id="L629" class="LineNr"> 629 </span> <span class="Constant"> . ╌╌╌╌╌ .</span> +<a name="L630"></a><span id="L630" class="LineNr"> 630 </span> <span class="Constant"> . .</span> +<a name="L631"></a><span id="L631" class="LineNr"> 631 </span> ] +<a name="L632"></a><span id="L632" class="LineNr"> 632 </span> memory-should-contain [ +<a name="L633"></a><span id="L633" class="LineNr"> 633 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L634"></a><span id="L634" class="LineNr"> 634 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L635"></a><span id="L635" class="LineNr"> 635 </span> ] +<a name="L636"></a><span id="L636" class="LineNr"> 636 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L637"></a><span id="L637" class="LineNr"> 637 </span>] +<a name="L638"></a><span id="L638" class="LineNr"> 638 </span> +<a name="L639"></a><span id="L639" class="LineNr"> 639 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow-at-end-of-line [ +<a name="L640"></a><span id="L640" class="LineNr"> 640 </span> <span class="Constant">local-scope</span> +<a name="L641"></a><span id="L641" class="LineNr"> 641 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L642"></a><span id="L642" class="LineNr"> 642 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L643"></a><span id="L643" class="LineNr"> 643 </span><span class="Constant">d]</span> +<a name="L644"></a><span id="L644" class="LineNr"> 644 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L645"></a><span id="L645" class="LineNr"> 645 </span> editor-render screen, e +<a name="L646"></a><span id="L646" class="LineNr"> 646 </span> $clear-trace +<a name="L647"></a><span id="L647" class="LineNr"> 647 </span> <span class="Comment"># move to end of line, press right-arrow, type a character</span> +<a name="L648"></a><span id="L648" class="LineNr"> 648 </span> assume-console [ +<a name="L649"></a><span id="L649" class="LineNr"> 649 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L650"></a><span id="L650" class="LineNr"> 650 </span> press right-arrow +<a name="L651"></a><span id="L651" class="LineNr"> 651 </span> type <span class="Constant">[0]</span> +<a name="L652"></a><span id="L652" class="LineNr"> 652 </span> ] +<a name="L653"></a><span id="L653" class="LineNr"> 653 </span> run [ +<a name="L654"></a><span id="L654" class="LineNr"> 654 </span> editor-event-loop screen, console, e +<a name="L655"></a><span id="L655" class="LineNr"> 655 </span> ] +<a name="L656"></a><span id="L656" class="LineNr"> 656 </span> <span class="Comment"># new character should be in next line</span> +<a name="L657"></a><span id="L657" class="LineNr"> 657 </span> screen-should-contain [ +<a name="L658"></a><span id="L658" class="LineNr"> 658 </span> <span class="Constant"> . .</span> +<a name="L659"></a><span id="L659" class="LineNr"> 659 </span> <span class="Constant"> .abc .</span> +<a name="L660"></a><span id="L660" class="LineNr"> 660 </span> <span class="Constant"> .0d .</span> +<a name="L661"></a><span id="L661" class="LineNr"> 661 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L662"></a><span id="L662" class="LineNr"> 662 </span> <span class="Constant"> . .</span> +<a name="L663"></a><span id="L663" class="LineNr"> 663 </span> ] +<a name="L664"></a><span id="L664" class="LineNr"> 664 </span> check-trace-count-for-label<span class="Constant"> 2</span>, <span class="Constant">[print-character]</span> +<a name="L665"></a><span id="L665" class="LineNr"> 665 </span>] +<a name="L666"></a><span id="L666" class="LineNr"> 666 </span> +<a name="L667"></a><span id="L667" class="LineNr"> 667 </span><span class="Comment"># todo: ctrl-right: next word-end</span> +<a name="L668"></a><span id="L668" class="LineNr"> 668 </span> +<a name="L669"></a><span id="L669" class="LineNr"> 669 </span><span class="Comment"># left arrow</span> +<a name="L670"></a><span id="L670" class="LineNr"> 670 </span> +<a name="L671"></a><span id="L671" class="LineNr"> 671 </span><span class="muScenario">scenario</span> editor-moves-cursor-left-with-key [ +<a name="L672"></a><span id="L672" class="LineNr"> 672 </span> <span class="Constant">local-scope</span> +<a name="L673"></a><span id="L673" class="LineNr"> 673 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L674"></a><span id="L674" class="LineNr"> 674 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abc]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L675"></a><span id="L675" class="LineNr"> 675 </span> editor-render screen, e +<a name="L676"></a><span id="L676" class="LineNr"> 676 </span> $clear-trace +<a name="L677"></a><span id="L677" class="LineNr"> 677 </span> assume-console [ +<a name="L678"></a><span id="L678" class="LineNr"> 678 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span> +<a name="L679"></a><span id="L679" class="LineNr"> 679 </span> press left-arrow +<a name="L680"></a><span id="L680" class="LineNr"> 680 </span> type <span class="Constant">[0]</span> +<a name="L681"></a><span id="L681" class="LineNr"> 681 </span> ] +<a name="L682"></a><span id="L682" class="LineNr"> 682 </span> run [ +<a name="L683"></a><span id="L683" class="LineNr"> 683 </span> editor-event-loop screen, console, e +<a name="L684"></a><span id="L684" class="LineNr"> 684 </span> ] +<a name="L685"></a><span id="L685" class="LineNr"> 685 </span> screen-should-contain [ +<a name="L686"></a><span id="L686" class="LineNr"> 686 </span> <span class="Constant"> . .</span> +<a name="L687"></a><span id="L687" class="LineNr"> 687 </span> <span class="Constant"> .a0bc .</span> +<a name="L688"></a><span id="L688" class="LineNr"> 688 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L689"></a><span id="L689" class="LineNr"> 689 </span> <span class="Constant"> . .</span> +<a name="L690"></a><span id="L690" class="LineNr"> 690 </span> ] +<a name="L691"></a><span id="L691" class="LineNr"> 691 </span> check-trace-count-for-label<span class="Constant"> 3</span>, <span class="Constant">[print-character]</span> +<a name="L692"></a><span id="L692" class="LineNr"> 692 </span>] +<a name="L693"></a><span id="L693" class="LineNr"> 693 </span> +<a name="L694"></a><span id="L694" class="LineNr"> 694 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L695"></a><span id="L695" class="LineNr"> 695 </span> <span class="Delimiter">{</span> +<a name="L696"></a><span id="L696" class="LineNr"> 696 </span> move-to-previous-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65515/left-arrow</span> +<a name="L697"></a><span id="L697" class="LineNr"> 697 </span> <span class="muControl">break-unless</span> move-to-previous-character? +<a name="L698"></a><span id="L698" class="LineNr"> 698 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[left arrow]</span> +<a name="L699"></a><span id="L699" class="LineNr"> 699 </span> <span class="Comment"># if not at start of text (before-cursor at § sentinel)</span> +<a name="L700"></a><span id="L700" class="LineNr"> 700 </span> prev:&:duplex-list:char <span class="Special"><-</span> prev before-cursor +<a name="L701"></a><span id="L701" class="LineNr"> 701 </span> <span class="muControl">return-unless</span> prev, <span class="Constant">0/don't-render</span> +<a name="L702"></a><span id="L702" class="LineNr"> 702 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L703"></a><span id="L703" class="LineNr"> 703 </span> go-render? <span class="Special"><-</span> move-cursor-coordinates-left editor +<a name="L704"></a><span id="L704" class="LineNr"> 704 </span> before-cursor <span class="Special"><-</span> copy prev +<a name="L705"></a><span id="L705" class="LineNr"> 705 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L706"></a><span id="L706" class="LineNr"> 706 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">1/left-arrow</span> +<a name="L707"></a><span id="L707" class="LineNr"> 707 </span><span class="Constant"> <move-cursor-end></span> +<a name="L708"></a><span id="L708" class="LineNr"> 708 </span> <span class="muControl">return</span> +<a name="L709"></a><span id="L709" class="LineNr"> 709 </span> <span class="Delimiter">}</span> +<a name="L710"></a><span id="L710" class="LineNr"> 710 </span>] +<a name="L711"></a><span id="L711" class="LineNr"> 711 </span> +<a name="L712"></a><span id="L712" class="LineNr"> 712 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line [ +<a name="L713"></a><span id="L713" class="LineNr"> 713 </span> <span class="Constant">local-scope</span> +<a name="L714"></a><span id="L714" class="LineNr"> 714 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L715"></a><span id="L715" class="LineNr"> 715 </span> <span class="Comment"># initialize editor with two lines</span> +<a name="L716"></a><span id="L716" class="LineNr"> 716 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L717"></a><span id="L717" class="LineNr"> 717 </span><span class="Constant">d]</span> +<a name="L718"></a><span id="L718" class="LineNr"> 718 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L719"></a><span id="L719" class="LineNr"> 719 </span> editor-render screen, e +<a name="L720"></a><span id="L720" class="LineNr"> 720 </span> $clear-trace +<a name="L721"></a><span id="L721" class="LineNr"> 721 </span> <span class="Comment"># position cursor at start of second line (so there's no previous newline)</span> +<a name="L722"></a><span id="L722" class="LineNr"> 722 </span> assume-console [ +<a name="L723"></a><span id="L723" class="LineNr"> 723 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<a name="L724"></a><span id="L724" class="LineNr"> 724 </span> press left-arrow +<a name="L725"></a><span id="L725" class="LineNr"> 725 </span> ] +<a name="L726"></a><span id="L726" class="LineNr"> 726 </span> run [ +<a name="L727"></a><span id="L727" class="LineNr"> 727 </span> editor-event-loop screen, console, e +<a name="L728"></a><span id="L728" class="LineNr"> 728 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L729"></a><span id="L729" class="LineNr"> 729 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L730"></a><span id="L730" class="LineNr"> 730 </span> ] +<a name="L731"></a><span id="L731" class="LineNr"> 731 </span> memory-should-contain [ +<a name="L732"></a><span id="L732" class="LineNr"> 732 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L733"></a><span id="L733" class="LineNr"> 733 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L734"></a><span id="L734" class="LineNr"> 734 </span> ] +<a name="L735"></a><span id="L735" class="LineNr"> 735 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L736"></a><span id="L736" class="LineNr"> 736 </span>] +<a name="L737"></a><span id="L737" class="LineNr"> 737 </span> +<a name="L738"></a><span id="L738" class="LineNr"> 738 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-2 [ +<a name="L739"></a><span id="L739" class="LineNr"> 739 </span> <span class="Constant">local-scope</span> +<a name="L740"></a><span id="L740" class="LineNr"> 740 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L741"></a><span id="L741" class="LineNr"> 741 </span> <span class="Comment"># initialize editor with three lines</span> +<a name="L742"></a><span id="L742" class="LineNr"> 742 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L743"></a><span id="L743" class="LineNr"> 743 </span><span class="Constant">def</span> +<a name="L744"></a><span id="L744" class="LineNr"> 744 </span><span class="Constant">g]</span> +<a name="L745"></a><span id="L745" class="LineNr"> 745 </span> e:&:editor <span class="Special"><-</span> new-editor s:text, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L746"></a><span id="L746" class="LineNr"> 746 </span> editor-render screen, e +<a name="L747"></a><span id="L747" class="LineNr"> 747 </span> $clear-trace +<a name="L748"></a><span id="L748" class="LineNr"> 748 </span> <span class="Comment"># position cursor further down (so there's a newline before the character at</span> +<a name="L749"></a><span id="L749" class="LineNr"> 749 </span> <span class="Comment"># the cursor)</span> +<a name="L750"></a><span id="L750" class="LineNr"> 750 </span> assume-console [ +<a name="L751"></a><span id="L751" class="LineNr"> 751 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L752"></a><span id="L752" class="LineNr"> 752 </span> press left-arrow +<a name="L753"></a><span id="L753" class="LineNr"> 753 </span> type <span class="Constant">[0]</span> +<a name="L754"></a><span id="L754" class="LineNr"> 754 </span> ] +<a name="L755"></a><span id="L755" class="LineNr"> 755 </span> run [ +<a name="L756"></a><span id="L756" class="LineNr"> 756 </span> editor-event-loop screen, console, e +<a name="L757"></a><span id="L757" class="LineNr"> 757 </span> ] +<a name="L758"></a><span id="L758" class="LineNr"> 758 </span> screen-should-contain [ +<a name="L759"></a><span id="L759" class="LineNr"> 759 </span> <span class="Constant"> . .</span> +<a name="L760"></a><span id="L760" class="LineNr"> 760 </span> <span class="Constant"> .abc .</span> +<a name="L761"></a><span id="L761" class="LineNr"> 761 </span> <span class="Constant"> .def0 .</span> +<a name="L762"></a><span id="L762" class="LineNr"> 762 </span> <span class="Constant"> .g .</span> +<a name="L763"></a><span id="L763" class="LineNr"> 763 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L764"></a><span id="L764" class="LineNr"> 764 </span> ] +<a name="L765"></a><span id="L765" class="LineNr"> 765 </span> check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span> <span class="Comment"># just the '0'</span> +<a name="L766"></a><span id="L766" class="LineNr"> 766 </span>] +<a name="L767"></a><span id="L767" class="LineNr"> 767 </span> +<a name="L768"></a><span id="L768" class="LineNr"> 768 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-3 [ +<a name="L769"></a><span id="L769" class="LineNr"> 769 </span> <span class="Constant">local-scope</span> +<a name="L770"></a><span id="L770" class="LineNr"> 770 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L771"></a><span id="L771" class="LineNr"> 771 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L772"></a><span id="L772" class="LineNr"> 772 </span><span class="Constant">def</span> +<a name="L773"></a><span id="L773" class="LineNr"> 773 </span><span class="Constant">g]</span> +<a name="L774"></a><span id="L774" class="LineNr"> 774 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L775"></a><span id="L775" class="LineNr"> 775 </span> editor-render screen, e +<a name="L776"></a><span id="L776" class="LineNr"> 776 </span> $clear-trace +<a name="L777"></a><span id="L777" class="LineNr"> 777 </span> <span class="Comment"># position cursor at start of text, press left-arrow, then type a character</span> +<a name="L778"></a><span id="L778" class="LineNr"> 778 </span> assume-console [ +<a name="L779"></a><span id="L779" class="LineNr"> 779 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 0</span> +<a name="L780"></a><span id="L780" class="LineNr"> 780 </span> press left-arrow +<a name="L781"></a><span id="L781" class="LineNr"> 781 </span> type <span class="Constant">[0]</span> +<a name="L782"></a><span id="L782" class="LineNr"> 782 </span> ] +<a name="L783"></a><span id="L783" class="LineNr"> 783 </span> run [ +<a name="L784"></a><span id="L784" class="LineNr"> 784 </span> editor-event-loop screen, console, e +<a name="L785"></a><span id="L785" class="LineNr"> 785 </span> ] +<a name="L786"></a><span id="L786" class="LineNr"> 786 </span> <span class="Comment"># left-arrow should have had no effect</span> +<a name="L787"></a><span id="L787" class="LineNr"> 787 </span> screen-should-contain [ +<a name="L788"></a><span id="L788" class="LineNr"> 788 </span> <span class="Constant"> . .</span> +<a name="L789"></a><span id="L789" class="LineNr"> 789 </span> <span class="Constant"> .0abc .</span> +<a name="L790"></a><span id="L790" class="LineNr"> 790 </span> <span class="Constant"> .def .</span> +<a name="L791"></a><span id="L791" class="LineNr"> 791 </span> <span class="Constant"> .g .</span> +<a name="L792"></a><span id="L792" class="LineNr"> 792 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L793"></a><span id="L793" class="LineNr"> 793 </span> ] +<a name="L794"></a><span id="L794" class="LineNr"> 794 </span> check-trace-count-for-label<span class="Constant"> 4</span>, <span class="Constant">[print-character]</span> <span class="Comment"># length of first line</span> +<a name="L795"></a><span id="L795" class="LineNr"> 795 </span>] +<a name="L796"></a><span id="L796" class="LineNr"> 796 </span> +<a name="L797"></a><span id="L797" class="LineNr"> 797 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-4 [ +<a name="L798"></a><span id="L798" class="LineNr"> 798 </span> <span class="Constant">local-scope</span> +<a name="L799"></a><span id="L799" class="LineNr"> 799 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L800"></a><span id="L800" class="LineNr"> 800 </span> <span class="Comment"># initialize editor with text containing an empty line</span> +<a name="L801"></a><span id="L801" class="LineNr"> 801 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L802"></a><span id="L802" class="LineNr"> 802 </span> +<a name="L803"></a><span id="L803" class="LineNr"> 803 </span>d] +<a name="L804"></a><span id="L804" class="LineNr"> 804 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L805"></a><span id="L805" class="LineNr"> 805 </span> editor-render screen, e:&:editor +<a name="L806"></a><span id="L806" class="LineNr"> 806 </span> $clear-trace +<a name="L807"></a><span id="L807" class="LineNr"> 807 </span> <span class="Comment"># position cursor right after empty line</span> +<a name="L808"></a><span id="L808" class="LineNr"> 808 </span> assume-console [ +<a name="L809"></a><span id="L809" class="LineNr"> 809 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L810"></a><span id="L810" class="LineNr"> 810 </span> press left-arrow +<a name="L811"></a><span id="L811" class="LineNr"> 811 </span> type <span class="Constant">[0]</span> +<a name="L812"></a><span id="L812" class="LineNr"> 812 </span> ] +<a name="L813"></a><span id="L813" class="LineNr"> 813 </span> run [ +<a name="L814"></a><span id="L814" class="LineNr"> 814 </span> editor-event-loop screen, console, e +<a name="L815"></a><span id="L815" class="LineNr"> 815 </span> ] +<a name="L816"></a><span id="L816" class="LineNr"> 816 </span> screen-should-contain [ +<a name="L817"></a><span id="L817" class="LineNr"> 817 </span> <span class="Constant"> . .</span> +<a name="L818"></a><span id="L818" class="LineNr"> 818 </span> <span class="Constant"> .abc .</span> +<a name="L819"></a><span id="L819" class="LineNr"> 819 </span> <span class="Constant"> .0 .</span> +<a name="L820"></a><span id="L820" class="LineNr"> 820 </span> <span class="Constant"> .d .</span> +<a name="L821"></a><span id="L821" class="LineNr"> 821 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L822"></a><span id="L822" class="LineNr"> 822 </span> ] +<a name="L823"></a><span id="L823" class="LineNr"> 823 </span> check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span> <span class="Comment"># just the '0'</span> +<a name="L824"></a><span id="L824" class="LineNr"> 824 </span>] +<a name="L825"></a><span id="L825" class="LineNr"> 825 </span> +<a name="L826"></a><span id="L826" class="LineNr"> 826 </span><span class="muScenario">scenario</span> editor-moves-across-screen-lines-across-wrap-with-left-arrow [ +<a name="L827"></a><span id="L827" class="LineNr"> 827 </span> <span class="Constant">local-scope</span> +<a name="L828"></a><span id="L828" class="LineNr"> 828 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L829"></a><span id="L829" class="LineNr"> 829 </span> <span class="Comment"># initialize editor with a wrapping line</span> +<a name="L830"></a><span id="L830" class="LineNr"> 830 </span> e:&:editor <span class="Special"><-</span> new-editor <span class="Constant">[abcdef]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L831"></a><span id="L831" class="LineNr"> 831 </span> editor-render screen, e +<a name="L832"></a><span id="L832" class="LineNr"> 832 </span> $clear-trace +<a name="L833"></a><span id="L833" class="LineNr"> 833 </span> screen-should-contain [ +<a name="L834"></a><span id="L834" class="LineNr"> 834 </span> <span class="Constant"> . .</span> +<a name="L835"></a><span id="L835" class="LineNr"> 835 </span> <span class="Constant"> .abcd↩ .</span> +<a name="L836"></a><span id="L836" class="LineNr"> 836 </span> <span class="Constant"> .ef .</span> +<a name="L837"></a><span id="L837" class="LineNr"> 837 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<a name="L838"></a><span id="L838" class="LineNr"> 838 </span> <span class="Constant"> . .</span> +<a name="L839"></a><span id="L839" class="LineNr"> 839 </span> ] +<a name="L840"></a><span id="L840" class="LineNr"> 840 </span> <span class="Comment"># position cursor right after empty line</span> +<a name="L841"></a><span id="L841" class="LineNr"> 841 </span> assume-console [ +<a name="L842"></a><span id="L842" class="LineNr"> 842 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<a name="L843"></a><span id="L843" class="LineNr"> 843 </span> press left-arrow +<a name="L844"></a><span id="L844" class="LineNr"> 844 </span> ] +<a name="L845"></a><span id="L845" class="LineNr"> 845 </span> run [ +<a name="L846"></a><span id="L846" class="LineNr"> 846 </span> editor-event-loop screen, console, e +<a name="L847"></a><span id="L847" class="LineNr"> 847 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L848"></a><span id="L848" class="LineNr"> 848 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L849"></a><span id="L849" class="LineNr"> 849 </span> ] +<a name="L850"></a><span id="L850" class="LineNr"> 850 </span> memory-should-contain [ +<a name="L851"></a><span id="L851" class="LineNr"> 851 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> <span class="Comment"># previous row</span> +<a name="L852"></a><span id="L852" class="LineNr"> 852 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> <span class="Comment"># right margin except wrap icon</span> +<a name="L853"></a><span id="L853" class="LineNr"> 853 </span> ] +<a name="L854"></a><span id="L854" class="LineNr"> 854 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L855"></a><span id="L855" class="LineNr"> 855 </span>] +<a name="L856"></a><span id="L856" class="LineNr"> 856 </span> +<a name="L857"></a><span id="L857" class="LineNr"> 857 </span><span class="muScenario">scenario</span> editor-moves-across-screen-lines-to-wrapping-line-with-left-arrow [ +<a name="L858"></a><span id="L858" class="LineNr"> 858 </span> <span class="Constant">local-scope</span> +<a name="L859"></a><span id="L859" class="LineNr"> 859 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L860"></a><span id="L860" class="LineNr"> 860 </span> <span class="Comment"># initialize editor with a wrapping line followed by a second line</span> +<a name="L861"></a><span id="L861" class="LineNr"> 861 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<a name="L862"></a><span id="L862" class="LineNr"> 862 </span><span class="Constant">g]</span> +<a name="L863"></a><span id="L863" class="LineNr"> 863 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L864"></a><span id="L864" class="LineNr"> 864 </span> editor-render screen, e +<a name="L865"></a><span id="L865" class="LineNr"> 865 </span> $clear-trace +<a name="L866"></a><span id="L866" class="LineNr"> 866 </span> screen-should-contain [ +<a name="L867"></a><span id="L867" class="LineNr"> 867 </span> <span class="Constant"> . .</span> +<a name="L868"></a><span id="L868" class="LineNr"> 868 </span> <span class="Constant"> .abcd↩ .</span> +<a name="L869"></a><span id="L869" class="LineNr"> 869 </span> <span class="Constant"> .ef .</span> +<a name="L870"></a><span id="L870" class="LineNr"> 870 </span> <span class="Constant"> .g .</span> +<a name="L871"></a><span id="L871" class="LineNr"> 871 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<a name="L872"></a><span id="L872" class="LineNr"> 872 </span> ] +<a name="L873"></a><span id="L873" class="LineNr"> 873 </span> <span class="Comment"># position cursor right after empty line</span> +<a name="L874"></a><span id="L874" class="LineNr"> 874 </span> assume-console [ +<a name="L875"></a><span id="L875" class="LineNr"> 875 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L876"></a><span id="L876" class="LineNr"> 876 </span> press left-arrow +<a name="L877"></a><span id="L877" class="LineNr"> 877 </span> ] +<a name="L878"></a><span id="L878" class="LineNr"> 878 </span> run [ +<a name="L879"></a><span id="L879" class="LineNr"> 879 </span> editor-event-loop screen, console, e +<a name="L880"></a><span id="L880" class="LineNr"> 880 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L881"></a><span id="L881" class="LineNr"> 881 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L882"></a><span id="L882" class="LineNr"> 882 </span> ] +<a name="L883"></a><span id="L883" class="LineNr"> 883 </span> memory-should-contain [ +<a name="L884"></a><span id="L884" class="LineNr"> 884 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> <span class="Comment"># previous row</span> +<a name="L885"></a><span id="L885" class="LineNr"> 885 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> <span class="Comment"># end of wrapped line</span> +<a name="L886"></a><span id="L886" class="LineNr"> 886 </span> ] +<a name="L887"></a><span id="L887" class="LineNr"> 887 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L888"></a><span id="L888" class="LineNr"> 888 </span>] +<a name="L889"></a><span id="L889" class="LineNr"> 889 </span> +<a name="L890"></a><span id="L890" class="LineNr"> 890 </span><span class="muScenario">scenario</span> editor-moves-across-screen-lines-to-non-wrapping-line-with-left-arrow [ +<a name="L891"></a><span id="L891" class="LineNr"> 891 </span> <span class="Constant">local-scope</span> +<a name="L892"></a><span id="L892" class="LineNr"> 892 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L893"></a><span id="L893" class="LineNr"> 893 </span> <span class="Comment"># initialize editor with a line on the verge of wrapping, followed by a second line</span> +<a name="L894"></a><span id="L894" class="LineNr"> 894 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcd</span> +<a name="L895"></a><span id="L895" class="LineNr"> 895 </span><span class="Constant">e]</span> +<a name="L896"></a><span id="L896" class="LineNr"> 896 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L897"></a><span id="L897" class="LineNr"> 897 </span> editor-render screen, e +<a name="L898"></a><span id="L898" class="LineNr"> 898 </span> $clear-trace +<a name="L899"></a><span id="L899" class="LineNr"> 899 </span> screen-should-contain [ +<a name="L900"></a><span id="L900" class="LineNr"> 900 </span> <span class="Constant"> . .</span> +<a name="L901"></a><span id="L901" class="LineNr"> 901 </span> <span class="Constant"> .abcd .</span> +<a name="L902"></a><span id="L902" class="LineNr"> 902 </span> <span class="Constant"> .e .</span> +<a name="L903"></a><span id="L903" class="LineNr"> 903 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<a name="L904"></a><span id="L904" class="LineNr"> 904 </span> <span class="Constant"> . .</span> +<a name="L905"></a><span id="L905" class="LineNr"> 905 </span> ] +<a name="L906"></a><span id="L906" class="LineNr"> 906 </span> <span class="Comment"># position cursor right after empty line</span> +<a name="L907"></a><span id="L907" class="LineNr"> 907 </span> assume-console [ +<a name="L908"></a><span id="L908" class="LineNr"> 908 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<a name="L909"></a><span id="L909" class="LineNr"> 909 </span> press left-arrow +<a name="L910"></a><span id="L910" class="LineNr"> 910 </span> ] +<a name="L911"></a><span id="L911" class="LineNr"> 911 </span> run [ +<a name="L912"></a><span id="L912" class="LineNr"> 912 </span> editor-event-loop screen, console, e +<a name="L913"></a><span id="L913" class="LineNr"> 913 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L914"></a><span id="L914" class="LineNr"> 914 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L915"></a><span id="L915" class="LineNr"> 915 </span> ] +<a name="L916"></a><span id="L916" class="LineNr"> 916 </span> memory-should-contain [ +<a name="L917"></a><span id="L917" class="LineNr"> 917 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> <span class="Comment"># previous row</span> +<a name="L918"></a><span id="L918" class="LineNr"> 918 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 4</span> <span class="Comment"># end of wrapped line</span> +<a name="L919"></a><span id="L919" class="LineNr"> 919 </span> ] +<a name="L920"></a><span id="L920" class="LineNr"> 920 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L921"></a><span id="L921" class="LineNr"> 921 </span>] +<a name="L922"></a><span id="L922" class="LineNr"> 922 </span> +<a name="L923"></a><span id="L923" class="LineNr"> 923 </span><span class="Comment"># todo: ctrl-left: previous word-start</span> +<a name="L924"></a><span id="L924" class="LineNr"> 924 </span> +<a name="L925"></a><span id="L925" class="LineNr"> 925 </span><span class="Comment"># up arrow</span> +<a name="L926"></a><span id="L926" class="LineNr"> 926 </span> +<a name="L927"></a><span id="L927" class="LineNr"> 927 </span><span class="muScenario">scenario</span> editor-moves-to-previous-line-with-up-arrow [ +<a name="L928"></a><span id="L928" class="LineNr"> 928 </span> <span class="Constant">local-scope</span> +<a name="L929"></a><span id="L929" class="LineNr"> 929 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L930"></a><span id="L930" class="LineNr"> 930 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L931"></a><span id="L931" class="LineNr"> 931 </span><span class="Constant">def]</span> +<a name="L932"></a><span id="L932" class="LineNr"> 932 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L933"></a><span id="L933" class="LineNr"> 933 </span> editor-render screen, e +<a name="L934"></a><span id="L934" class="LineNr"> 934 </span> $clear-trace +<a name="L935"></a><span id="L935" class="LineNr"> 935 </span> assume-console [ +<a name="L936"></a><span id="L936" class="LineNr"> 936 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> +<a name="L937"></a><span id="L937" class="LineNr"> 937 </span> press up-arrow +<a name="L938"></a><span id="L938" class="LineNr"> 938 </span> ] +<a name="L939"></a><span id="L939" class="LineNr"> 939 </span> run [ +<a name="L940"></a><span id="L940" class="LineNr"> 940 </span> editor-event-loop screen, console, e +<a name="L941"></a><span id="L941" class="LineNr"> 941 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L942"></a><span id="L942" class="LineNr"> 942 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L943"></a><span id="L943" class="LineNr"> 943 </span> ] +<a name="L944"></a><span id="L944" class="LineNr"> 944 </span> memory-should-contain [ +<a name="L945"></a><span id="L945" class="LineNr"> 945 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L946"></a><span id="L946" class="LineNr"> 946 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L947"></a><span id="L947" class="LineNr"> 947 </span> ] +<a name="L948"></a><span id="L948" class="LineNr"> 948 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L949"></a><span id="L949" class="LineNr"> 949 </span> assume-console [ +<a name="L950"></a><span id="L950" class="LineNr"> 950 </span> type <span class="Constant">[0]</span> +<a name="L951"></a><span id="L951" class="LineNr"> 951 </span> ] +<a name="L952"></a><span id="L952" class="LineNr"> 952 </span> run [ +<a name="L953"></a><span id="L953" class="LineNr"> 953 </span> editor-event-loop screen, console, e +<a name="L954"></a><span id="L954" class="LineNr"> 954 </span> ] +<a name="L955"></a><span id="L955" class="LineNr"> 955 </span> screen-should-contain [ +<a name="L956"></a><span id="L956" class="LineNr"> 956 </span> <span class="Constant"> . .</span> +<a name="L957"></a><span id="L957" class="LineNr"> 957 </span> <span class="Constant"> .a0bc .</span> +<a name="L958"></a><span id="L958" class="LineNr"> 958 </span> <span class="Constant"> .def .</span> +<a name="L959"></a><span id="L959" class="LineNr"> 959 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L960"></a><span id="L960" class="LineNr"> 960 </span> <span class="Constant"> . .</span> +<a name="L961"></a><span id="L961" class="LineNr"> 961 </span> ] +<a name="L962"></a><span id="L962" class="LineNr"> 962 </span>] +<a name="L963"></a><span id="L963" class="LineNr"> 963 </span> +<a name="L964"></a><span id="L964" class="LineNr"> 964 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L965"></a><span id="L965" class="LineNr"> 965 </span> <span class="Delimiter">{</span> +<a name="L966"></a><span id="L966" class="LineNr"> 966 </span> move-to-previous-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65517/up-arrow</span> +<a name="L967"></a><span id="L967" class="LineNr"> 967 </span> <span class="muControl">break-unless</span> move-to-previous-line? +<a name="L968"></a><span id="L968" class="LineNr"> 968 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L969"></a><span id="L969" class="LineNr"> 969 </span> go-render? <span class="Special"><-</span> move-to-previous-line editor +<a name="L970"></a><span id="L970" class="LineNr"> 970 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">3/up-arrow</span> +<a name="L971"></a><span id="L971" class="LineNr"> 971 </span><span class="Constant"> <move-cursor-end></span> +<a name="L972"></a><span id="L972" class="LineNr"> 972 </span> <span class="muControl">return</span> +<a name="L973"></a><span id="L973" class="LineNr"> 973 </span> <span class="Delimiter">}</span> +<a name="L974"></a><span id="L974" class="LineNr"> 974 </span>] +<a name="L975"></a><span id="L975" class="LineNr"> 975 </span> +<a name="L976"></a><span id="L976" class="LineNr"> 976 </span><span class="muRecipe">def</span> move-to-previous-line editor:&:editor<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ +<a name="L977"></a><span id="L977" class="LineNr"> 977 </span> <span class="Constant">local-scope</span> +<a name="L978"></a><span id="L978" class="LineNr"> 978 </span> <span class="Constant">load-ingredients</span> +<a name="L979"></a><span id="L979" class="LineNr"> 979 </span> go-render?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<a name="L980"></a><span id="L980" class="LineNr"> 980 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L981"></a><span id="L981" class="LineNr"> 981 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L982"></a><span id="L982" class="LineNr"> 982 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L983"></a><span id="L983" class="LineNr"> 983 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L984"></a><span id="L984" class="LineNr"> 984 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L985"></a><span id="L985" class="LineNr"> 985 </span> already-at-top?:bool <span class="Special"><-</span> lesser-or-equal cursor-row, <span class="Constant">1/top</span> +<a name="L986"></a><span id="L986" class="LineNr"> 986 </span> <span class="Delimiter">{</span> +<a name="L987"></a><span id="L987" class="LineNr"> 987 </span> <span class="Comment"># if cursor not at top, move it</span> +<a name="L988"></a><span id="L988" class="LineNr"> 988 </span> <span class="muControl">break-if</span> already-at-top? +<a name="L989"></a><span id="L989" class="LineNr"> 989 </span> <span class="Comment"># if not at newline, move to start of line (previous newline)</span> +<a name="L990"></a><span id="L990" class="LineNr"> 990 </span> <span class="Comment"># then scan back another line</span> +<a name="L991"></a><span id="L991" class="LineNr"> 991 </span> <span class="Comment"># if either step fails, give up without modifying cursor or coordinates</span> +<a name="L992"></a><span id="L992" class="LineNr"> 992 </span> curr:&:duplex-list:char <span class="Special"><-</span> copy before-cursor +<a name="L993"></a><span id="L993" class="LineNr"> 993 </span> <span class="Delimiter">{</span> +<a name="L994"></a><span id="L994" class="LineNr"> 994 </span> old:&:duplex-list:char <span class="Special"><-</span> copy curr +<a name="L995"></a><span id="L995" class="LineNr"> 995 </span> c2:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L996"></a><span id="L996" class="LineNr"> 996 </span> at-newline?:bool <span class="Special"><-</span> equal c2, <span class="Constant">10/newline</span> +<a name="L997"></a><span id="L997" class="LineNr"> 997 </span> <span class="muControl">break-if</span> at-newline? +<a name="L998"></a><span id="L998" class="LineNr"> 998 </span> curr:&:duplex-list:char <span class="Special"><-</span> before-previous-line curr, editor +<a name="L999"></a><span id="L999" class="LineNr"> 999 </span> no-motion?:bool <span class="Special"><-</span> equal curr, old +<a name="L1000"></a><span id="L1000" class="LineNr">1000 </span> <span class="muControl">return-if</span> no-motion? +<a name="L1001"></a><span id="L1001" class="LineNr">1001 </span> <span class="Delimiter">}</span> +<a name="L1002"></a><span id="L1002" class="LineNr">1002 </span> <span class="Delimiter">{</span> +<a name="L1003"></a><span id="L1003" class="LineNr">1003 </span> old <span class="Special"><-</span> copy curr +<a name="L1004"></a><span id="L1004" class="LineNr">1004 </span> curr <span class="Special"><-</span> before-previous-line curr, editor +<a name="L1005"></a><span id="L1005" class="LineNr">1005 </span> no-motion?:bool <span class="Special"><-</span> equal curr, old +<a name="L1006"></a><span id="L1006" class="LineNr">1006 </span> <span class="muControl">return-if</span> no-motion? +<a name="L1007"></a><span id="L1007" class="LineNr">1007 </span> <span class="Delimiter">}</span> +<a name="L1008"></a><span id="L1008" class="LineNr">1008 </span> before-cursor <span class="Special"><-</span> copy curr +<a name="L1009"></a><span id="L1009" class="LineNr">1009 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1010"></a><span id="L1010" class="LineNr">1010 </span> cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> +<a name="L1011"></a><span id="L1011" class="LineNr">1011 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L1012"></a><span id="L1012" class="LineNr">1012 </span> <span class="Comment"># scan ahead to right column or until end of line</span> +<a name="L1013"></a><span id="L1013" class="LineNr">1013 </span> target-column:num <span class="Special"><-</span> copy cursor-column +<a name="L1014"></a><span id="L1014" class="LineNr">1014 </span> cursor-column <span class="Special"><-</span> copy left +<a name="L1015"></a><span id="L1015" class="LineNr">1015 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L1016"></a><span id="L1016" class="LineNr">1016 </span> <span class="Delimiter">{</span> +<a name="L1017"></a><span id="L1017" class="LineNr">1017 </span> done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, target-column +<a name="L1018"></a><span id="L1018" class="LineNr">1018 </span> <span class="muControl">break-if</span> done? +<a name="L1019"></a><span id="L1019" class="LineNr">1019 </span> curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L1020"></a><span id="L1020" class="LineNr">1020 </span> <span class="muControl">break-unless</span> curr +<a name="L1021"></a><span id="L1021" class="LineNr">1021 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L1022"></a><span id="L1022" class="LineNr">1022 </span> at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> +<a name="L1023"></a><span id="L1023" class="LineNr">1023 </span> <span class="muControl">break-if</span> at-newline? +<a name="L1024"></a><span id="L1024" class="LineNr">1024 </span> <span class="Comment">#</span> +<a name="L1025"></a><span id="L1025" class="LineNr">1025 </span> before-cursor <span class="Special"><-</span> copy curr +<a name="L1026"></a><span id="L1026" class="LineNr">1026 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1027"></a><span id="L1027" class="LineNr">1027 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> +<a name="L1028"></a><span id="L1028" class="LineNr">1028 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L1029"></a><span id="L1029" class="LineNr">1029 </span> <span class="muControl">loop</span> +<a name="L1030"></a><span id="L1030" class="LineNr">1030 </span> <span class="Delimiter">}</span> +<a name="L1031"></a><span id="L1031" class="LineNr">1031 </span> <span class="muControl">return</span> +<a name="L1032"></a><span id="L1032" class="LineNr">1032 </span> <span class="Delimiter">}</span> +<a name="L1033"></a><span id="L1033" class="LineNr">1033 </span> <span class="Delimiter">{</span> +<a name="L1034"></a><span id="L1034" class="LineNr">1034 </span> <span class="Comment"># if cursor already at top, scroll up</span> +<a name="L1035"></a><span id="L1035" class="LineNr">1035 </span> <span class="muControl">break-unless</span> already-at-top? +<a name="L1036"></a><span id="L1036" class="LineNr">1036 </span><span class="Constant"> <scroll-up></span> +<a name="L1037"></a><span id="L1037" class="LineNr">1037 </span> <span class="muControl">return</span> <span class="Constant">1/go-render</span> +<a name="L1038"></a><span id="L1038" class="LineNr">1038 </span> <span class="Delimiter">}</span> +<a name="L1039"></a><span id="L1039" class="LineNr">1039 </span>] +<a name="L1040"></a><span id="L1040" class="LineNr">1040 </span> +<a name="L1041"></a><span id="L1041" class="LineNr">1041 </span><span class="muScenario">scenario</span> editor-adjusts-column-at-previous-line [ +<a name="L1042"></a><span id="L1042" class="LineNr">1042 </span> <span class="Constant">local-scope</span> +<a name="L1043"></a><span id="L1043" class="LineNr">1043 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1044"></a><span id="L1044" class="LineNr">1044 </span> s:text <span class="Special"><-</span> new <span class="Constant">[ab</span> +<a name="L1045"></a><span id="L1045" class="LineNr">1045 </span><span class="Constant">def]</span> +<a name="L1046"></a><span id="L1046" class="LineNr">1046 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1047"></a><span id="L1047" class="LineNr">1047 </span> editor-render screen, e +<a name="L1048"></a><span id="L1048" class="LineNr">1048 </span> $clear-trace +<a name="L1049"></a><span id="L1049" class="LineNr">1049 </span> assume-console [ +<a name="L1050"></a><span id="L1050" class="LineNr">1050 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> +<a name="L1051"></a><span id="L1051" class="LineNr">1051 </span> press up-arrow +<a name="L1052"></a><span id="L1052" class="LineNr">1052 </span> ] +<a name="L1053"></a><span id="L1053" class="LineNr">1053 </span> run [ +<a name="L1054"></a><span id="L1054" class="LineNr">1054 </span> editor-event-loop screen, console, e +<a name="L1055"></a><span id="L1055" class="LineNr">1055 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1056"></a><span id="L1056" class="LineNr">1056 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1057"></a><span id="L1057" class="LineNr">1057 </span> ] +<a name="L1058"></a><span id="L1058" class="LineNr">1058 </span> memory-should-contain [ +<a name="L1059"></a><span id="L1059" class="LineNr">1059 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1060"></a><span id="L1060" class="LineNr">1060 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1061"></a><span id="L1061" class="LineNr">1061 </span> ] +<a name="L1062"></a><span id="L1062" class="LineNr">1062 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1063"></a><span id="L1063" class="LineNr">1063 </span> assume-console [ +<a name="L1064"></a><span id="L1064" class="LineNr">1064 </span> type <span class="Constant">[0]</span> +<a name="L1065"></a><span id="L1065" class="LineNr">1065 </span> ] +<a name="L1066"></a><span id="L1066" class="LineNr">1066 </span> run [ +<a name="L1067"></a><span id="L1067" class="LineNr">1067 </span> editor-event-loop screen, console, e +<a name="L1068"></a><span id="L1068" class="LineNr">1068 </span> ] +<a name="L1069"></a><span id="L1069" class="LineNr">1069 </span> screen-should-contain [ +<a name="L1070"></a><span id="L1070" class="LineNr">1070 </span> <span class="Constant"> . .</span> +<a name="L1071"></a><span id="L1071" class="LineNr">1071 </span> <span class="Constant"> .ab0 .</span> +<a name="L1072"></a><span id="L1072" class="LineNr">1072 </span> <span class="Constant"> .def .</span> +<a name="L1073"></a><span id="L1073" class="LineNr">1073 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1074"></a><span id="L1074" class="LineNr">1074 </span> <span class="Constant"> . .</span> +<a name="L1075"></a><span id="L1075" class="LineNr">1075 </span> ] +<a name="L1076"></a><span id="L1076" class="LineNr">1076 </span>] +<a name="L1077"></a><span id="L1077" class="LineNr">1077 </span> +<a name="L1078"></a><span id="L1078" class="LineNr">1078 </span><span class="muScenario">scenario</span> editor-adjusts-column-at-empty-line [ +<a name="L1079"></a><span id="L1079" class="LineNr">1079 </span> <span class="Constant">local-scope</span> +<a name="L1080"></a><span id="L1080" class="LineNr">1080 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1081"></a><span id="L1081" class="LineNr">1081 </span> s:text <span class="Special"><-</span> new [ +<a name="L1082"></a><span id="L1082" class="LineNr">1082 </span><span class="muRecipe">def</span>] +<a name="L1083"></a><span id="L1083" class="LineNr">1083 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1084"></a><span id="L1084" class="LineNr">1084 </span> editor-render screen, e +<a name="L1085"></a><span id="L1085" class="LineNr">1085 </span> $clear-trace +<a name="L1086"></a><span id="L1086" class="LineNr">1086 </span> assume-console [ +<a name="L1087"></a><span id="L1087" class="LineNr">1087 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> +<a name="L1088"></a><span id="L1088" class="LineNr">1088 </span> press up-arrow +<a name="L1089"></a><span id="L1089" class="LineNr">1089 </span> ] +<a name="L1090"></a><span id="L1090" class="LineNr">1090 </span> run [ +<a name="L1091"></a><span id="L1091" class="LineNr">1091 </span> editor-event-loop screen, console, e +<a name="L1092"></a><span id="L1092" class="LineNr">1092 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1093"></a><span id="L1093" class="LineNr">1093 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1094"></a><span id="L1094" class="LineNr">1094 </span> ] +<a name="L1095"></a><span id="L1095" class="LineNr">1095 </span> memory-should-contain [ +<a name="L1096"></a><span id="L1096" class="LineNr">1096 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1097"></a><span id="L1097" class="LineNr">1097 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1098"></a><span id="L1098" class="LineNr">1098 </span> ] +<a name="L1099"></a><span id="L1099" class="LineNr">1099 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1100"></a><span id="L1100" class="LineNr">1100 </span> assume-console [ +<a name="L1101"></a><span id="L1101" class="LineNr">1101 </span> type <span class="Constant">[0]</span> +<a name="L1102"></a><span id="L1102" class="LineNr">1102 </span> ] +<a name="L1103"></a><span id="L1103" class="LineNr">1103 </span> run [ +<a name="L1104"></a><span id="L1104" class="LineNr">1104 </span> editor-event-loop screen, console, e +<a name="L1105"></a><span id="L1105" class="LineNr">1105 </span> ] +<a name="L1106"></a><span id="L1106" class="LineNr">1106 </span> screen-should-contain [ +<a name="L1107"></a><span id="L1107" class="LineNr">1107 </span> <span class="Constant"> . .</span> +<a name="L1108"></a><span id="L1108" class="LineNr">1108 </span> <span class="Constant"> .0 .</span> +<a name="L1109"></a><span id="L1109" class="LineNr">1109 </span> <span class="Constant"> .def .</span> +<a name="L1110"></a><span id="L1110" class="LineNr">1110 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1111"></a><span id="L1111" class="LineNr">1111 </span> <span class="Constant"> . .</span> +<a name="L1112"></a><span id="L1112" class="LineNr">1112 </span> ] +<a name="L1113"></a><span id="L1113" class="LineNr">1113 </span>] +<a name="L1114"></a><span id="L1114" class="LineNr">1114 </span> +<a name="L1115"></a><span id="L1115" class="LineNr">1115 </span><span class="muScenario">scenario</span> editor-moves-to-previous-line-from-left-margin [ +<a name="L1116"></a><span id="L1116" class="LineNr">1116 </span> <span class="Constant">local-scope</span> +<a name="L1117"></a><span id="L1117" class="LineNr">1117 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1118"></a><span id="L1118" class="LineNr">1118 </span> <span class="Comment"># start out with three lines</span> +<a name="L1119"></a><span id="L1119" class="LineNr">1119 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L1120"></a><span id="L1120" class="LineNr">1120 </span><span class="Constant">def</span> +<a name="L1121"></a><span id="L1121" class="LineNr">1121 </span><span class="Constant">ghi]</span> +<a name="L1122"></a><span id="L1122" class="LineNr">1122 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1123"></a><span id="L1123" class="LineNr">1123 </span> editor-render screen, e +<a name="L1124"></a><span id="L1124" class="LineNr">1124 </span> $clear-trace +<a name="L1125"></a><span id="L1125" class="LineNr">1125 </span> <span class="Comment"># click on the third line and hit up-arrow, so you end up just after a newline</span> +<a name="L1126"></a><span id="L1126" class="LineNr">1126 </span> assume-console [ +<a name="L1127"></a><span id="L1127" class="LineNr">1127 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L1128"></a><span id="L1128" class="LineNr">1128 </span> press up-arrow +<a name="L1129"></a><span id="L1129" class="LineNr">1129 </span> ] +<a name="L1130"></a><span id="L1130" class="LineNr">1130 </span> run [ +<a name="L1131"></a><span id="L1131" class="LineNr">1131 </span> editor-event-loop screen, console, e +<a name="L1132"></a><span id="L1132" class="LineNr">1132 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1133"></a><span id="L1133" class="LineNr">1133 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1134"></a><span id="L1134" class="LineNr">1134 </span> ] +<a name="L1135"></a><span id="L1135" class="LineNr">1135 </span> memory-should-contain [ +<a name="L1136"></a><span id="L1136" class="LineNr">1136 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1137"></a><span id="L1137" class="LineNr">1137 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1138"></a><span id="L1138" class="LineNr">1138 </span> ] +<a name="L1139"></a><span id="L1139" class="LineNr">1139 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1140"></a><span id="L1140" class="LineNr">1140 </span> assume-console [ +<a name="L1141"></a><span id="L1141" class="LineNr">1141 </span> type <span class="Constant">[0]</span> +<a name="L1142"></a><span id="L1142" class="LineNr">1142 </span> ] +<a name="L1143"></a><span id="L1143" class="LineNr">1143 </span> run [ +<a name="L1144"></a><span id="L1144" class="LineNr">1144 </span> editor-event-loop screen, console, e +<a name="L1145"></a><span id="L1145" class="LineNr">1145 </span> ] +<a name="L1146"></a><span id="L1146" class="LineNr">1146 </span> screen-should-contain [ +<a name="L1147"></a><span id="L1147" class="LineNr">1147 </span> <span class="Constant"> . .</span> +<a name="L1148"></a><span id="L1148" class="LineNr">1148 </span> <span class="Constant"> .abc .</span> +<a name="L1149"></a><span id="L1149" class="LineNr">1149 </span> <span class="Constant"> .0def .</span> +<a name="L1150"></a><span id="L1150" class="LineNr">1150 </span> <span class="Constant"> .ghi .</span> +<a name="L1151"></a><span id="L1151" class="LineNr">1151 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1152"></a><span id="L1152" class="LineNr">1152 </span> ] +<a name="L1153"></a><span id="L1153" class="LineNr">1153 </span>] +<a name="L1154"></a><span id="L1154" class="LineNr">1154 </span> +<a name="L1155"></a><span id="L1155" class="LineNr">1155 </span><span class="Comment"># down arrow</span> +<a name="L1156"></a><span id="L1156" class="LineNr">1156 </span> +<a name="L1157"></a><span id="L1157" class="LineNr">1157 </span><span class="muScenario">scenario</span> editor-moves-to-next-line-with-down-arrow [ +<a name="L1158"></a><span id="L1158" class="LineNr">1158 </span> <span class="Constant">local-scope</span> +<a name="L1159"></a><span id="L1159" class="LineNr">1159 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1160"></a><span id="L1160" class="LineNr">1160 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L1161"></a><span id="L1161" class="LineNr">1161 </span><span class="Constant">def]</span> +<a name="L1162"></a><span id="L1162" class="LineNr">1162 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1163"></a><span id="L1163" class="LineNr">1163 </span> editor-render screen, e +<a name="L1164"></a><span id="L1164" class="LineNr">1164 </span> $clear-trace +<a name="L1165"></a><span id="L1165" class="LineNr">1165 </span> <span class="Comment"># cursor starts out at (1, 0)</span> +<a name="L1166"></a><span id="L1166" class="LineNr">1166 </span> assume-console [ +<a name="L1167"></a><span id="L1167" class="LineNr">1167 </span> press down-arrow +<a name="L1168"></a><span id="L1168" class="LineNr">1168 </span> ] +<a name="L1169"></a><span id="L1169" class="LineNr">1169 </span> run [ +<a name="L1170"></a><span id="L1170" class="LineNr">1170 </span> editor-event-loop screen, console, e +<a name="L1171"></a><span id="L1171" class="LineNr">1171 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1172"></a><span id="L1172" class="LineNr">1172 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1173"></a><span id="L1173" class="LineNr">1173 </span> ] +<a name="L1174"></a><span id="L1174" class="LineNr">1174 </span> <span class="Comment"># ..and ends at (2, 0)</span> +<a name="L1175"></a><span id="L1175" class="LineNr">1175 </span> memory-should-contain [ +<a name="L1176"></a><span id="L1176" class="LineNr">1176 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1177"></a><span id="L1177" class="LineNr">1177 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1178"></a><span id="L1178" class="LineNr">1178 </span> ] +<a name="L1179"></a><span id="L1179" class="LineNr">1179 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1180"></a><span id="L1180" class="LineNr">1180 </span> assume-console [ +<a name="L1181"></a><span id="L1181" class="LineNr">1181 </span> type <span class="Constant">[0]</span> +<a name="L1182"></a><span id="L1182" class="LineNr">1182 </span> ] +<a name="L1183"></a><span id="L1183" class="LineNr">1183 </span> run [ +<a name="L1184"></a><span id="L1184" class="LineNr">1184 </span> editor-event-loop screen, console, e +<a name="L1185"></a><span id="L1185" class="LineNr">1185 </span> ] +<a name="L1186"></a><span id="L1186" class="LineNr">1186 </span> screen-should-contain [ +<a name="L1187"></a><span id="L1187" class="LineNr">1187 </span> <span class="Constant"> . .</span> +<a name="L1188"></a><span id="L1188" class="LineNr">1188 </span> <span class="Constant"> .abc .</span> +<a name="L1189"></a><span id="L1189" class="LineNr">1189 </span> <span class="Constant"> .0def .</span> +<a name="L1190"></a><span id="L1190" class="LineNr">1190 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1191"></a><span id="L1191" class="LineNr">1191 </span> <span class="Constant"> . .</span> +<a name="L1192"></a><span id="L1192" class="LineNr">1192 </span> ] +<a name="L1193"></a><span id="L1193" class="LineNr">1193 </span>] +<a name="L1194"></a><span id="L1194" class="LineNr">1194 </span> +<a name="L1195"></a><span id="L1195" class="LineNr">1195 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L1196"></a><span id="L1196" class="LineNr">1196 </span> <span class="Delimiter">{</span> +<a name="L1197"></a><span id="L1197" class="LineNr">1197 </span> move-to-next-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65516/down-arrow</span> +<a name="L1198"></a><span id="L1198" class="LineNr">1198 </span> <span class="muControl">break-unless</span> move-to-next-line? +<a name="L1199"></a><span id="L1199" class="LineNr">1199 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L1200"></a><span id="L1200" class="LineNr">1200 </span> go-render? <span class="Special"><-</span> move-to-next-line editor, screen-height +<a name="L1201"></a><span id="L1201" class="LineNr">1201 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">4/down-arrow</span> +<a name="L1202"></a><span id="L1202" class="LineNr">1202 </span><span class="Constant"> <move-cursor-end></span> +<a name="L1203"></a><span id="L1203" class="LineNr">1203 </span> <span class="muControl">return</span> +<a name="L1204"></a><span id="L1204" class="LineNr">1204 </span> <span class="Delimiter">}</span> +<a name="L1205"></a><span id="L1205" class="LineNr">1205 </span>] +<a name="L1206"></a><span id="L1206" class="LineNr">1206 </span> +<a name="L1207"></a><span id="L1207" class="LineNr">1207 </span><span class="muRecipe">def</span> move-to-next-line editor:&:editor, screen-height:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ +<a name="L1208"></a><span id="L1208" class="LineNr">1208 </span> <span class="Constant">local-scope</span> +<a name="L1209"></a><span id="L1209" class="LineNr">1209 </span> <span class="Constant">load-ingredients</span> +<a name="L1210"></a><span id="L1210" class="LineNr">1210 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<a name="L1211"></a><span id="L1211" class="LineNr">1211 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L1212"></a><span id="L1212" class="LineNr">1212 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L1213"></a><span id="L1213" class="LineNr">1213 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L1214"></a><span id="L1214" class="LineNr">1214 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L1215"></a><span id="L1215" class="LineNr">1215 </span> last-line:num <span class="Special"><-</span> subtract screen-height,<span class="Constant"> 1</span> +<a name="L1216"></a><span id="L1216" class="LineNr">1216 </span> already-at-bottom?:bool <span class="Special"><-</span> greater-or-equal cursor-row, last-line +<a name="L1217"></a><span id="L1217" class="LineNr">1217 </span> <span class="Delimiter">{</span> +<a name="L1218"></a><span id="L1218" class="LineNr">1218 </span> <span class="Comment"># if cursor not at bottom, move it</span> +<a name="L1219"></a><span id="L1219" class="LineNr">1219 </span> <span class="muControl">break-if</span> already-at-bottom? +<a name="L1220"></a><span id="L1220" class="LineNr">1220 </span> <span class="Comment"># scan to start of next line, then to right column or until end of line</span> +<a name="L1221"></a><span id="L1221" class="LineNr">1221 </span> max:num <span class="Special"><-</span> subtract right, left +<a name="L1222"></a><span id="L1222" class="LineNr">1222 </span> next-line:&:duplex-list:char <span class="Special"><-</span> before-start-of-next-line before-cursor, max +<a name="L1223"></a><span id="L1223" class="LineNr">1223 </span> <span class="Delimiter">{</span> +<a name="L1224"></a><span id="L1224" class="LineNr">1224 </span> <span class="Comment"># already at end of buffer? try to scroll up (so we can see more</span> +<a name="L1225"></a><span id="L1225" class="LineNr">1225 </span> <span class="Comment"># warnings or sandboxes below)</span> +<a name="L1226"></a><span id="L1226" class="LineNr">1226 </span> no-motion?:bool <span class="Special"><-</span> equal next-line, before-cursor +<a name="L1227"></a><span id="L1227" class="LineNr">1227 </span> <span class="muControl">break-unless</span> no-motion? +<a name="L1228"></a><span id="L1228" class="LineNr">1228 </span> scroll?:bool <span class="Special"><-</span> greater-than cursor-row,<span class="Constant"> 1</span> +<a name="L1229"></a><span id="L1229" class="LineNr">1229 </span> <span class="muControl">break-if</span> scroll?, <span class="Constant">+try-to-scroll</span> +<a name="L1230"></a><span id="L1230" class="LineNr">1230 </span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span> +<a name="L1231"></a><span id="L1231" class="LineNr">1231 </span> <span class="Delimiter">}</span> +<a name="L1232"></a><span id="L1232" class="LineNr">1232 </span> cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> +<a name="L1233"></a><span id="L1233" class="LineNr">1233 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row +<a name="L1234"></a><span id="L1234" class="LineNr">1234 </span> before-cursor <span class="Special"><-</span> copy next-line +<a name="L1235"></a><span id="L1235" class="LineNr">1235 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1236"></a><span id="L1236" class="LineNr">1236 </span> target-column:num <span class="Special"><-</span> copy cursor-column +<a name="L1237"></a><span id="L1237" class="LineNr">1237 </span> cursor-column <span class="Special"><-</span> copy left +<a name="L1238"></a><span id="L1238" class="LineNr">1238 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L1239"></a><span id="L1239" class="LineNr">1239 </span> <span class="Delimiter">{</span> +<a name="L1240"></a><span id="L1240" class="LineNr">1240 </span> done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, target-column +<a name="L1241"></a><span id="L1241" class="LineNr">1241 </span> <span class="muControl">break-if</span> done? +<a name="L1242"></a><span id="L1242" class="LineNr">1242 </span> curr:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L1243"></a><span id="L1243" class="LineNr">1243 </span> <span class="muControl">break-unless</span> curr +<a name="L1244"></a><span id="L1244" class="LineNr">1244 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L1245"></a><span id="L1245" class="LineNr">1245 </span> at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> +<a name="L1246"></a><span id="L1246" class="LineNr">1246 </span> <span class="muControl">break-if</span> at-newline? +<a name="L1247"></a><span id="L1247" class="LineNr">1247 </span> <span class="Comment">#</span> +<a name="L1248"></a><span id="L1248" class="LineNr">1248 </span> before-cursor <span class="Special"><-</span> copy curr +<a name="L1249"></a><span id="L1249" class="LineNr">1249 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1250"></a><span id="L1250" class="LineNr">1250 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> +<a name="L1251"></a><span id="L1251" class="LineNr">1251 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L1252"></a><span id="L1252" class="LineNr">1252 </span> <span class="muControl">loop</span> +<a name="L1253"></a><span id="L1253" class="LineNr">1253 </span> <span class="Delimiter">}</span> +<a name="L1254"></a><span id="L1254" class="LineNr">1254 </span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span> +<a name="L1255"></a><span id="L1255" class="LineNr">1255 </span> <span class="Delimiter">}</span> +<a name="L1256"></a><span id="L1256" class="LineNr">1256 </span><span class="Constant"> +try-to-scroll</span> +<a name="L1257"></a><span id="L1257" class="LineNr">1257 </span><span class="Constant"> <scroll-down></span> +<a name="L1258"></a><span id="L1258" class="LineNr">1258 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">1/true</span> +<a name="L1259"></a><span id="L1259" class="LineNr">1259 </span>] +<a name="L1260"></a><span id="L1260" class="LineNr">1260 </span> +<a name="L1261"></a><span id="L1261" class="LineNr">1261 </span><span class="muScenario">scenario</span> editor-adjusts-column-at-next-line [ +<a name="L1262"></a><span id="L1262" class="LineNr">1262 </span> <span class="Constant">local-scope</span> +<a name="L1263"></a><span id="L1263" class="LineNr">1263 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1264"></a><span id="L1264" class="LineNr">1264 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L1265"></a><span id="L1265" class="LineNr">1265 </span><span class="Constant">de]</span> +<a name="L1266"></a><span id="L1266" class="LineNr">1266 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1267"></a><span id="L1267" class="LineNr">1267 </span> editor-render screen, e +<a name="L1268"></a><span id="L1268" class="LineNr">1268 </span> $clear-trace +<a name="L1269"></a><span id="L1269" class="LineNr">1269 </span> assume-console [ +<a name="L1270"></a><span id="L1270" class="LineNr">1270 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L1271"></a><span id="L1271" class="LineNr">1271 </span> press down-arrow +<a name="L1272"></a><span id="L1272" class="LineNr">1272 </span> ] +<a name="L1273"></a><span id="L1273" class="LineNr">1273 </span> run [ +<a name="L1274"></a><span id="L1274" class="LineNr">1274 </span> editor-event-loop screen, console, e +<a name="L1275"></a><span id="L1275" class="LineNr">1275 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1276"></a><span id="L1276" class="LineNr">1276 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1277"></a><span id="L1277" class="LineNr">1277 </span> ] +<a name="L1278"></a><span id="L1278" class="LineNr">1278 </span> memory-should-contain [ +<a name="L1279"></a><span id="L1279" class="LineNr">1279 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1280"></a><span id="L1280" class="LineNr">1280 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1281"></a><span id="L1281" class="LineNr">1281 </span> ] +<a name="L1282"></a><span id="L1282" class="LineNr">1282 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1283"></a><span id="L1283" class="LineNr">1283 </span> assume-console [ +<a name="L1284"></a><span id="L1284" class="LineNr">1284 </span> type <span class="Constant">[0]</span> +<a name="L1285"></a><span id="L1285" class="LineNr">1285 </span> ] +<a name="L1286"></a><span id="L1286" class="LineNr">1286 </span> run [ +<a name="L1287"></a><span id="L1287" class="LineNr">1287 </span> editor-event-loop screen, console, e +<a name="L1288"></a><span id="L1288" class="LineNr">1288 </span> ] +<a name="L1289"></a><span id="L1289" class="LineNr">1289 </span> screen-should-contain [ +<a name="L1290"></a><span id="L1290" class="LineNr">1290 </span> <span class="Constant"> . .</span> +<a name="L1291"></a><span id="L1291" class="LineNr">1291 </span> <span class="Constant"> .abc .</span> +<a name="L1292"></a><span id="L1292" class="LineNr">1292 </span> <span class="Constant"> .de0 .</span> +<a name="L1293"></a><span id="L1293" class="LineNr">1293 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1294"></a><span id="L1294" class="LineNr">1294 </span> <span class="Constant"> . .</span> +<a name="L1295"></a><span id="L1295" class="LineNr">1295 </span> ] +<a name="L1296"></a><span id="L1296" class="LineNr">1296 </span>] +<a name="L1297"></a><span id="L1297" class="LineNr">1297 </span> +<a name="L1298"></a><span id="L1298" class="LineNr">1298 </span><span class="Comment"># ctrl-a/home - move cursor to start of line</span> +<a name="L1299"></a><span id="L1299" class="LineNr">1299 </span> +<a name="L1300"></a><span id="L1300" class="LineNr">1300 </span><span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-ctrl-a [ +<a name="L1301"></a><span id="L1301" class="LineNr">1301 </span> <span class="Constant">local-scope</span> +<a name="L1302"></a><span id="L1302" class="LineNr">1302 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1303"></a><span id="L1303" class="LineNr">1303 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1304"></a><span id="L1304" class="LineNr">1304 </span><span class="Constant">456]</span> +<a name="L1305"></a><span id="L1305" class="LineNr">1305 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1306"></a><span id="L1306" class="LineNr">1306 </span> editor-render screen, e +<a name="L1307"></a><span id="L1307" class="LineNr">1307 </span> $clear-trace +<a name="L1308"></a><span id="L1308" class="LineNr">1308 </span> <span class="Comment"># start on second line, press ctrl-a</span> +<a name="L1309"></a><span id="L1309" class="LineNr">1309 </span> assume-console [ +<a name="L1310"></a><span id="L1310" class="LineNr">1310 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> +<a name="L1311"></a><span id="L1311" class="LineNr">1311 </span> press ctrl-a +<a name="L1312"></a><span id="L1312" class="LineNr">1312 </span> ] +<a name="L1313"></a><span id="L1313" class="LineNr">1313 </span> run [ +<a name="L1314"></a><span id="L1314" class="LineNr">1314 </span> editor-event-loop screen, console, e +<a name="L1315"></a><span id="L1315" class="LineNr">1315 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1316"></a><span id="L1316" class="LineNr">1316 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1317"></a><span id="L1317" class="LineNr">1317 </span> ] +<a name="L1318"></a><span id="L1318" class="LineNr">1318 </span> <span class="Comment"># cursor moves to start of line</span> +<a name="L1319"></a><span id="L1319" class="LineNr">1319 </span> memory-should-contain [ +<a name="L1320"></a><span id="L1320" class="LineNr">1320 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1321"></a><span id="L1321" class="LineNr">1321 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1322"></a><span id="L1322" class="LineNr">1322 </span> ] +<a name="L1323"></a><span id="L1323" class="LineNr">1323 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1324"></a><span id="L1324" class="LineNr">1324 </span>] +<a name="L1325"></a><span id="L1325" class="LineNr">1325 </span> +<a name="L1326"></a><span id="L1326" class="LineNr">1326 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L1327"></a><span id="L1327" class="LineNr">1327 </span> <span class="Delimiter">{</span> +<a name="L1328"></a><span id="L1328" class="LineNr">1328 </span> move-to-start-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">1/ctrl-a</span> +<a name="L1329"></a><span id="L1329" class="LineNr">1329 </span> <span class="muControl">break-unless</span> move-to-start-of-line? +<a name="L1330"></a><span id="L1330" class="LineNr">1330 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L1331"></a><span id="L1331" class="LineNr">1331 </span> move-to-start-of-line editor +<a name="L1332"></a><span id="L1332" class="LineNr">1332 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L1333"></a><span id="L1333" class="LineNr">1333 </span><span class="Constant"> <move-cursor-end></span> +<a name="L1334"></a><span id="L1334" class="LineNr">1334 </span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span> +<a name="L1335"></a><span id="L1335" class="LineNr">1335 </span> <span class="Delimiter">}</span> +<a name="L1336"></a><span id="L1336" class="LineNr">1336 </span>] +<a name="L1337"></a><span id="L1337" class="LineNr">1337 </span> +<a name="L1338"></a><span id="L1338" class="LineNr">1338 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L1339"></a><span id="L1339" class="LineNr">1339 </span> <span class="Delimiter">{</span> +<a name="L1340"></a><span id="L1340" class="LineNr">1340 </span> move-to-start-of-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65521/home</span> +<a name="L1341"></a><span id="L1341" class="LineNr">1341 </span> <span class="muControl">break-unless</span> move-to-start-of-line? +<a name="L1342"></a><span id="L1342" class="LineNr">1342 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L1343"></a><span id="L1343" class="LineNr">1343 </span> move-to-start-of-line editor +<a name="L1344"></a><span id="L1344" class="LineNr">1344 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L1345"></a><span id="L1345" class="LineNr">1345 </span><span class="Constant"> <move-cursor-end></span> +<a name="L1346"></a><span id="L1346" class="LineNr">1346 </span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span> +<a name="L1347"></a><span id="L1347" class="LineNr">1347 </span> <span class="Delimiter">}</span> +<a name="L1348"></a><span id="L1348" class="LineNr">1348 </span>] +<a name="L1349"></a><span id="L1349" class="LineNr">1349 </span> +<a name="L1350"></a><span id="L1350" class="LineNr">1350 </span><span class="muRecipe">def</span> move-to-start-of-line editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ +<a name="L1351"></a><span id="L1351" class="LineNr">1351 </span> <span class="Constant">local-scope</span> +<a name="L1352"></a><span id="L1352" class="LineNr">1352 </span> <span class="Constant">load-ingredients</span> +<a name="L1353"></a><span id="L1353" class="LineNr">1353 </span> <span class="Comment"># update cursor column</span> +<a name="L1354"></a><span id="L1354" class="LineNr">1354 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L1355"></a><span id="L1355" class="LineNr">1355 </span> cursor-column:num <span class="Special"><-</span> copy left +<a name="L1356"></a><span id="L1356" class="LineNr">1356 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L1357"></a><span id="L1357" class="LineNr">1357 </span> <span class="Comment"># update before-cursor</span> +<a name="L1358"></a><span id="L1358" class="LineNr">1358 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L1359"></a><span id="L1359" class="LineNr">1359 </span> init:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<a name="L1360"></a><span id="L1360" class="LineNr">1360 </span> <span class="Comment"># while not at start of line, move</span> +<a name="L1361"></a><span id="L1361" class="LineNr">1361 </span> <span class="Delimiter">{</span> +<a name="L1362"></a><span id="L1362" class="LineNr">1362 </span> at-start-of-text?:bool <span class="Special"><-</span> equal before-cursor, init +<a name="L1363"></a><span id="L1363" class="LineNr">1363 </span> <span class="muControl">break-if</span> at-start-of-text? +<a name="L1364"></a><span id="L1364" class="LineNr">1364 </span> prev:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> +<a name="L1365"></a><span id="L1365" class="LineNr">1365 </span> at-start-of-line?:bool <span class="Special"><-</span> equal prev, <span class="Constant">10/newline</span> +<a name="L1366"></a><span id="L1366" class="LineNr">1366 </span> <span class="muControl">break-if</span> at-start-of-line? +<a name="L1367"></a><span id="L1367" class="LineNr">1367 </span> before-cursor <span class="Special"><-</span> prev before-cursor +<a name="L1368"></a><span id="L1368" class="LineNr">1368 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1369"></a><span id="L1369" class="LineNr">1369 </span> assert before-cursor, <span class="Constant">[move-to-start-of-line tried to move before start of text]</span> +<a name="L1370"></a><span id="L1370" class="LineNr">1370 </span> <span class="muControl">loop</span> +<a name="L1371"></a><span id="L1371" class="LineNr">1371 </span> <span class="Delimiter">}</span> +<a name="L1372"></a><span id="L1372" class="LineNr">1372 </span>] +<a name="L1373"></a><span id="L1373" class="LineNr">1373 </span> +<a name="L1374"></a><span id="L1374" class="LineNr">1374 </span><span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-ctrl-a-2 [ +<a name="L1375"></a><span id="L1375" class="LineNr">1375 </span> <span class="Constant">local-scope</span> +<a name="L1376"></a><span id="L1376" class="LineNr">1376 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1377"></a><span id="L1377" class="LineNr">1377 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1378"></a><span id="L1378" class="LineNr">1378 </span><span class="Constant">456]</span> +<a name="L1379"></a><span id="L1379" class="LineNr">1379 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1380"></a><span id="L1380" class="LineNr">1380 </span> editor-render screen, e +<a name="L1381"></a><span id="L1381" class="LineNr">1381 </span> $clear-trace +<a name="L1382"></a><span id="L1382" class="LineNr">1382 </span> <span class="Comment"># start on first line (no newline before), press ctrl-a</span> +<a name="L1383"></a><span id="L1383" class="LineNr">1383 </span> assume-console [ +<a name="L1384"></a><span id="L1384" class="LineNr">1384 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L1385"></a><span id="L1385" class="LineNr">1385 </span> press ctrl-a +<a name="L1386"></a><span id="L1386" class="LineNr">1386 </span> ] +<a name="L1387"></a><span id="L1387" class="LineNr">1387 </span> run [ +<a name="L1388"></a><span id="L1388" class="LineNr">1388 </span> editor-event-loop screen, console, e +<a name="L1389"></a><span id="L1389" class="LineNr">1389 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1390"></a><span id="L1390" class="LineNr">1390 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1391"></a><span id="L1391" class="LineNr">1391 </span> ] +<a name="L1392"></a><span id="L1392" class="LineNr">1392 </span> <span class="Comment"># cursor moves to start of line</span> +<a name="L1393"></a><span id="L1393" class="LineNr">1393 </span> memory-should-contain [ +<a name="L1394"></a><span id="L1394" class="LineNr">1394 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1395"></a><span id="L1395" class="LineNr">1395 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1396"></a><span id="L1396" class="LineNr">1396 </span> ] +<a name="L1397"></a><span id="L1397" class="LineNr">1397 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1398"></a><span id="L1398" class="LineNr">1398 </span>] +<a name="L1399"></a><span id="L1399" class="LineNr">1399 </span> +<a name="L1400"></a><span id="L1400" class="LineNr">1400 </span><span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-home [ +<a name="L1401"></a><span id="L1401" class="LineNr">1401 </span> <span class="Constant">local-scope</span> +<a name="L1402"></a><span id="L1402" class="LineNr">1402 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1403"></a><span id="L1403" class="LineNr">1403 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1404"></a><span id="L1404" class="LineNr">1404 </span><span class="Constant">456]</span> +<a name="L1405"></a><span id="L1405" class="LineNr">1405 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1406"></a><span id="L1406" class="LineNr">1406 </span> $clear-trace +<a name="L1407"></a><span id="L1407" class="LineNr">1407 </span> <span class="Comment"># start on second line, press 'home'</span> +<a name="L1408"></a><span id="L1408" class="LineNr">1408 </span> assume-console [ +<a name="L1409"></a><span id="L1409" class="LineNr">1409 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> +<a name="L1410"></a><span id="L1410" class="LineNr">1410 </span> press home +<a name="L1411"></a><span id="L1411" class="LineNr">1411 </span> ] +<a name="L1412"></a><span id="L1412" class="LineNr">1412 </span> run [ +<a name="L1413"></a><span id="L1413" class="LineNr">1413 </span> editor-event-loop screen, console, e +<a name="L1414"></a><span id="L1414" class="LineNr">1414 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1415"></a><span id="L1415" class="LineNr">1415 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1416"></a><span id="L1416" class="LineNr">1416 </span> ] +<a name="L1417"></a><span id="L1417" class="LineNr">1417 </span> <span class="Comment"># cursor moves to start of line</span> +<a name="L1418"></a><span id="L1418" class="LineNr">1418 </span> memory-should-contain [ +<a name="L1419"></a><span id="L1419" class="LineNr">1419 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1420"></a><span id="L1420" class="LineNr">1420 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1421"></a><span id="L1421" class="LineNr">1421 </span> ] +<a name="L1422"></a><span id="L1422" class="LineNr">1422 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1423"></a><span id="L1423" class="LineNr">1423 </span>] +<a name="L1424"></a><span id="L1424" class="LineNr">1424 </span> +<a name="L1425"></a><span id="L1425" class="LineNr">1425 </span><span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-home-2 [ +<a name="L1426"></a><span id="L1426" class="LineNr">1426 </span> <span class="Constant">local-scope</span> +<a name="L1427"></a><span id="L1427" class="LineNr">1427 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1428"></a><span id="L1428" class="LineNr">1428 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1429"></a><span id="L1429" class="LineNr">1429 </span><span class="Constant">456]</span> +<a name="L1430"></a><span id="L1430" class="LineNr">1430 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1431"></a><span id="L1431" class="LineNr">1431 </span> editor-render screen, e +<a name="L1432"></a><span id="L1432" class="LineNr">1432 </span> $clear-trace +<a name="L1433"></a><span id="L1433" class="LineNr">1433 </span> <span class="Comment"># start on first line (no newline before), press 'home'</span> +<a name="L1434"></a><span id="L1434" class="LineNr">1434 </span> assume-console [ +<a name="L1435"></a><span id="L1435" class="LineNr">1435 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L1436"></a><span id="L1436" class="LineNr">1436 </span> press home +<a name="L1437"></a><span id="L1437" class="LineNr">1437 </span> ] +<a name="L1438"></a><span id="L1438" class="LineNr">1438 </span> run [ +<a name="L1439"></a><span id="L1439" class="LineNr">1439 </span> editor-event-loop screen, console, e +<a name="L1440"></a><span id="L1440" class="LineNr">1440 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1441"></a><span id="L1441" class="LineNr">1441 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1442"></a><span id="L1442" class="LineNr">1442 </span> ] +<a name="L1443"></a><span id="L1443" class="LineNr">1443 </span> <span class="Comment"># cursor moves to start of line</span> +<a name="L1444"></a><span id="L1444" class="LineNr">1444 </span> memory-should-contain [ +<a name="L1445"></a><span id="L1445" class="LineNr">1445 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1446"></a><span id="L1446" class="LineNr">1446 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L1447"></a><span id="L1447" class="LineNr">1447 </span> ] +<a name="L1448"></a><span id="L1448" class="LineNr">1448 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1449"></a><span id="L1449" class="LineNr">1449 </span>] +<a name="L1450"></a><span id="L1450" class="LineNr">1450 </span> +<a name="L1451"></a><span id="L1451" class="LineNr">1451 </span><span class="Comment"># ctrl-e/end - move cursor to end of line</span> +<a name="L1452"></a><span id="L1452" class="LineNr">1452 </span> +<a name="L1453"></a><span id="L1453" class="LineNr">1453 </span><span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-ctrl-e [ +<a name="L1454"></a><span id="L1454" class="LineNr">1454 </span> <span class="Constant">local-scope</span> +<a name="L1455"></a><span id="L1455" class="LineNr">1455 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1456"></a><span id="L1456" class="LineNr">1456 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1457"></a><span id="L1457" class="LineNr">1457 </span><span class="Constant">456]</span> +<a name="L1458"></a><span id="L1458" class="LineNr">1458 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1459"></a><span id="L1459" class="LineNr">1459 </span> editor-render screen, e +<a name="L1460"></a><span id="L1460" class="LineNr">1460 </span> $clear-trace +<a name="L1461"></a><span id="L1461" class="LineNr">1461 </span> <span class="Comment"># start on first line, press ctrl-e</span> +<a name="L1462"></a><span id="L1462" class="LineNr">1462 </span> assume-console [ +<a name="L1463"></a><span id="L1463" class="LineNr">1463 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> +<a name="L1464"></a><span id="L1464" class="LineNr">1464 </span> press ctrl-e +<a name="L1465"></a><span id="L1465" class="LineNr">1465 </span> ] +<a name="L1466"></a><span id="L1466" class="LineNr">1466 </span> run [ +<a name="L1467"></a><span id="L1467" class="LineNr">1467 </span> editor-event-loop screen, console, e +<a name="L1468"></a><span id="L1468" class="LineNr">1468 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1469"></a><span id="L1469" class="LineNr">1469 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1470"></a><span id="L1470" class="LineNr">1470 </span> ] +<a name="L1471"></a><span id="L1471" class="LineNr">1471 </span> <span class="Comment"># cursor moves to end of line</span> +<a name="L1472"></a><span id="L1472" class="LineNr">1472 </span> memory-should-contain [ +<a name="L1473"></a><span id="L1473" class="LineNr">1473 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1474"></a><span id="L1474" class="LineNr">1474 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L1475"></a><span id="L1475" class="LineNr">1475 </span> ] +<a name="L1476"></a><span id="L1476" class="LineNr">1476 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1477"></a><span id="L1477" class="LineNr">1477 </span> <span class="Comment"># editor inserts future characters at cursor</span> +<a name="L1478"></a><span id="L1478" class="LineNr">1478 </span> assume-console [ +<a name="L1479"></a><span id="L1479" class="LineNr">1479 </span> type <span class="Constant">[z]</span> +<a name="L1480"></a><span id="L1480" class="LineNr">1480 </span> ] +<a name="L1481"></a><span id="L1481" class="LineNr">1481 </span> run [ +<a name="L1482"></a><span id="L1482" class="LineNr">1482 </span> editor-event-loop screen, console, e +<a name="L1483"></a><span id="L1483" class="LineNr">1483 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1484"></a><span id="L1484" class="LineNr">1484 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1485"></a><span id="L1485" class="LineNr">1485 </span> ] +<a name="L1486"></a><span id="L1486" class="LineNr">1486 </span> memory-should-contain [ +<a name="L1487"></a><span id="L1487" class="LineNr">1487 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1488"></a><span id="L1488" class="LineNr">1488 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 4</span> +<a name="L1489"></a><span id="L1489" class="LineNr">1489 </span> ] +<a name="L1490"></a><span id="L1490" class="LineNr">1490 </span> screen-should-contain [ +<a name="L1491"></a><span id="L1491" class="LineNr">1491 </span> <span class="Constant"> . .</span> +<a name="L1492"></a><span id="L1492" class="LineNr">1492 </span> <span class="Constant"> .123z .</span> +<a name="L1493"></a><span id="L1493" class="LineNr">1493 </span> <span class="Constant"> .456 .</span> +<a name="L1494"></a><span id="L1494" class="LineNr">1494 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1495"></a><span id="L1495" class="LineNr">1495 </span> <span class="Constant"> . .</span> +<a name="L1496"></a><span id="L1496" class="LineNr">1496 </span> ] +<a name="L1497"></a><span id="L1497" class="LineNr">1497 </span> check-trace-count-for-label<span class="Constant"> 1</span>, <span class="Constant">[print-character]</span> +<a name="L1498"></a><span id="L1498" class="LineNr">1498 </span>] +<a name="L1499"></a><span id="L1499" class="LineNr">1499 </span> +<a name="L1500"></a><span id="L1500" class="LineNr">1500 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L1501"></a><span id="L1501" class="LineNr">1501 </span> <span class="Delimiter">{</span> +<a name="L1502"></a><span id="L1502" class="LineNr">1502 </span> move-to-end-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">5/ctrl-e</span> +<a name="L1503"></a><span id="L1503" class="LineNr">1503 </span> <span class="muControl">break-unless</span> move-to-end-of-line? +<a name="L1504"></a><span id="L1504" class="LineNr">1504 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L1505"></a><span id="L1505" class="LineNr">1505 </span> move-to-end-of-line editor +<a name="L1506"></a><span id="L1506" class="LineNr">1506 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L1507"></a><span id="L1507" class="LineNr">1507 </span><span class="Constant"> <move-cursor-end></span> +<a name="L1508"></a><span id="L1508" class="LineNr">1508 </span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span> +<a name="L1509"></a><span id="L1509" class="LineNr">1509 </span> <span class="Delimiter">}</span> +<a name="L1510"></a><span id="L1510" class="LineNr">1510 </span>] +<a name="L1511"></a><span id="L1511" class="LineNr">1511 </span> +<a name="L1512"></a><span id="L1512" class="LineNr">1512 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L1513"></a><span id="L1513" class="LineNr">1513 </span> <span class="Delimiter">{</span> +<a name="L1514"></a><span id="L1514" class="LineNr">1514 </span> move-to-end-of-line?:bool <span class="Special"><-</span> equal k, <span class="Constant">65520/end</span> +<a name="L1515"></a><span id="L1515" class="LineNr">1515 </span> <span class="muControl">break-unless</span> move-to-end-of-line? +<a name="L1516"></a><span id="L1516" class="LineNr">1516 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L1517"></a><span id="L1517" class="LineNr">1517 </span> move-to-end-of-line editor +<a name="L1518"></a><span id="L1518" class="LineNr">1518 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L1519"></a><span id="L1519" class="LineNr">1519 </span><span class="Constant"> <move-cursor-end></span> +<a name="L1520"></a><span id="L1520" class="LineNr">1520 </span> <span class="muControl">return</span> <span class="Constant">0/don't-render</span> +<a name="L1521"></a><span id="L1521" class="LineNr">1521 </span> <span class="Delimiter">}</span> +<a name="L1522"></a><span id="L1522" class="LineNr">1522 </span>] +<a name="L1523"></a><span id="L1523" class="LineNr">1523 </span> +<a name="L1524"></a><span id="L1524" class="LineNr">1524 </span><span class="muRecipe">def</span> move-to-end-of-line editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ +<a name="L1525"></a><span id="L1525" class="LineNr">1525 </span> <span class="Constant">local-scope</span> +<a name="L1526"></a><span id="L1526" class="LineNr">1526 </span> <span class="Constant">load-ingredients</span> +<a name="L1527"></a><span id="L1527" class="LineNr">1527 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L1528"></a><span id="L1528" class="LineNr">1528 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<a name="L1529"></a><span id="L1529" class="LineNr">1529 </span> <span class="Comment"># while not at start of line, move</span> +<a name="L1530"></a><span id="L1530" class="LineNr">1530 </span> <span class="Delimiter">{</span> +<a name="L1531"></a><span id="L1531" class="LineNr">1531 </span> next:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L1532"></a><span id="L1532" class="LineNr">1532 </span> <span class="muControl">break-unless</span> next <span class="Comment"># end of text</span> +<a name="L1533"></a><span id="L1533" class="LineNr">1533 </span> nextc:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> +<a name="L1534"></a><span id="L1534" class="LineNr">1534 </span> at-end-of-line?:bool <span class="Special"><-</span> equal nextc, <span class="Constant">10/newline</span> +<a name="L1535"></a><span id="L1535" class="LineNr">1535 </span> <span class="muControl">break-if</span> at-end-of-line? +<a name="L1536"></a><span id="L1536" class="LineNr">1536 </span> before-cursor <span class="Special"><-</span> copy next +<a name="L1537"></a><span id="L1537" class="LineNr">1537 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1538"></a><span id="L1538" class="LineNr">1538 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> +<a name="L1539"></a><span id="L1539" class="LineNr">1539 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<a name="L1540"></a><span id="L1540" class="LineNr">1540 </span> <span class="muControl">loop</span> +<a name="L1541"></a><span id="L1541" class="LineNr">1541 </span> <span class="Delimiter">}</span> +<a name="L1542"></a><span id="L1542" class="LineNr">1542 </span>] +<a name="L1543"></a><span id="L1543" class="LineNr">1543 </span> +<a name="L1544"></a><span id="L1544" class="LineNr">1544 </span><span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-ctrl-e-2 [ +<a name="L1545"></a><span id="L1545" class="LineNr">1545 </span> <span class="Constant">local-scope</span> +<a name="L1546"></a><span id="L1546" class="LineNr">1546 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1547"></a><span id="L1547" class="LineNr">1547 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1548"></a><span id="L1548" class="LineNr">1548 </span><span class="Constant">456]</span> +<a name="L1549"></a><span id="L1549" class="LineNr">1549 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1550"></a><span id="L1550" class="LineNr">1550 </span> editor-render screen, e +<a name="L1551"></a><span id="L1551" class="LineNr">1551 </span> $clear-trace +<a name="L1552"></a><span id="L1552" class="LineNr">1552 </span> <span class="Comment"># start on second line (no newline after), press ctrl-e</span> +<a name="L1553"></a><span id="L1553" class="LineNr">1553 </span> assume-console [ +<a name="L1554"></a><span id="L1554" class="LineNr">1554 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> +<a name="L1555"></a><span id="L1555" class="LineNr">1555 </span> press ctrl-e +<a name="L1556"></a><span id="L1556" class="LineNr">1556 </span> ] +<a name="L1557"></a><span id="L1557" class="LineNr">1557 </span> run [ +<a name="L1558"></a><span id="L1558" class="LineNr">1558 </span> editor-event-loop screen, console, e +<a name="L1559"></a><span id="L1559" class="LineNr">1559 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1560"></a><span id="L1560" class="LineNr">1560 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1561"></a><span id="L1561" class="LineNr">1561 </span> ] +<a name="L1562"></a><span id="L1562" class="LineNr">1562 </span> <span class="Comment"># cursor moves to end of line</span> +<a name="L1563"></a><span id="L1563" class="LineNr">1563 </span> memory-should-contain [ +<a name="L1564"></a><span id="L1564" class="LineNr">1564 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1565"></a><span id="L1565" class="LineNr">1565 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L1566"></a><span id="L1566" class="LineNr">1566 </span> ] +<a name="L1567"></a><span id="L1567" class="LineNr">1567 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1568"></a><span id="L1568" class="LineNr">1568 </span>] +<a name="L1569"></a><span id="L1569" class="LineNr">1569 </span> +<a name="L1570"></a><span id="L1570" class="LineNr">1570 </span><span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-end [ +<a name="L1571"></a><span id="L1571" class="LineNr">1571 </span> <span class="Constant">local-scope</span> +<a name="L1572"></a><span id="L1572" class="LineNr">1572 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1573"></a><span id="L1573" class="LineNr">1573 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1574"></a><span id="L1574" class="LineNr">1574 </span><span class="Constant">456]</span> +<a name="L1575"></a><span id="L1575" class="LineNr">1575 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1576"></a><span id="L1576" class="LineNr">1576 </span> editor-render screen, e +<a name="L1577"></a><span id="L1577" class="LineNr">1577 </span> $clear-trace +<a name="L1578"></a><span id="L1578" class="LineNr">1578 </span> <span class="Comment"># start on first line, press 'end'</span> +<a name="L1579"></a><span id="L1579" class="LineNr">1579 </span> assume-console [ +<a name="L1580"></a><span id="L1580" class="LineNr">1580 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> +<a name="L1581"></a><span id="L1581" class="LineNr">1581 </span> press end +<a name="L1582"></a><span id="L1582" class="LineNr">1582 </span> ] +<a name="L1583"></a><span id="L1583" class="LineNr">1583 </span> run [ +<a name="L1584"></a><span id="L1584" class="LineNr">1584 </span> editor-event-loop screen, console, e +<a name="L1585"></a><span id="L1585" class="LineNr">1585 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1586"></a><span id="L1586" class="LineNr">1586 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1587"></a><span id="L1587" class="LineNr">1587 </span> ] +<a name="L1588"></a><span id="L1588" class="LineNr">1588 </span> <span class="Comment"># cursor moves to end of line</span> +<a name="L1589"></a><span id="L1589" class="LineNr">1589 </span> memory-should-contain [ +<a name="L1590"></a><span id="L1590" class="LineNr">1590 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L1591"></a><span id="L1591" class="LineNr">1591 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L1592"></a><span id="L1592" class="LineNr">1592 </span> ] +<a name="L1593"></a><span id="L1593" class="LineNr">1593 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1594"></a><span id="L1594" class="LineNr">1594 </span>] +<a name="L1595"></a><span id="L1595" class="LineNr">1595 </span> +<a name="L1596"></a><span id="L1596" class="LineNr">1596 </span><span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-end-2 [ +<a name="L1597"></a><span id="L1597" class="LineNr">1597 </span> <span class="Constant">local-scope</span> +<a name="L1598"></a><span id="L1598" class="LineNr">1598 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1599"></a><span id="L1599" class="LineNr">1599 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1600"></a><span id="L1600" class="LineNr">1600 </span><span class="Constant">456]</span> +<a name="L1601"></a><span id="L1601" class="LineNr">1601 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1602"></a><span id="L1602" class="LineNr">1602 </span> editor-render screen, e +<a name="L1603"></a><span id="L1603" class="LineNr">1603 </span> $clear-trace +<a name="L1604"></a><span id="L1604" class="LineNr">1604 </span> <span class="Comment"># start on second line (no newline after), press 'end'</span> +<a name="L1605"></a><span id="L1605" class="LineNr">1605 </span> assume-console [ +<a name="L1606"></a><span id="L1606" class="LineNr">1606 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> +<a name="L1607"></a><span id="L1607" class="LineNr">1607 </span> press end +<a name="L1608"></a><span id="L1608" class="LineNr">1608 </span> ] +<a name="L1609"></a><span id="L1609" class="LineNr">1609 </span> run [ +<a name="L1610"></a><span id="L1610" class="LineNr">1610 </span> editor-event-loop screen, console, e +<a name="L1611"></a><span id="L1611" class="LineNr">1611 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L1612"></a><span id="L1612" class="LineNr">1612 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L1613"></a><span id="L1613" class="LineNr">1613 </span> ] +<a name="L1614"></a><span id="L1614" class="LineNr">1614 </span> <span class="Comment"># cursor moves to end of line</span> +<a name="L1615"></a><span id="L1615" class="LineNr">1615 </span> memory-should-contain [ +<a name="L1616"></a><span id="L1616" class="LineNr">1616 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L1617"></a><span id="L1617" class="LineNr">1617 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L1618"></a><span id="L1618" class="LineNr">1618 </span> ] +<a name="L1619"></a><span id="L1619" class="LineNr">1619 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L1620"></a><span id="L1620" class="LineNr">1620 </span>] +<a name="L1621"></a><span id="L1621" class="LineNr">1621 </span> +<a name="L1622"></a><span id="L1622" class="LineNr">1622 </span><span class="Comment"># ctrl-u - delete text from start of line until (but not at) cursor</span> +<a name="L1623"></a><span id="L1623" class="LineNr">1623 </span> +<a name="L1624"></a><span id="L1624" class="LineNr">1624 </span><span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u [ +<a name="L1625"></a><span id="L1625" class="LineNr">1625 </span> <span class="Constant">local-scope</span> +<a name="L1626"></a><span id="L1626" class="LineNr">1626 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1627"></a><span id="L1627" class="LineNr">1627 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1628"></a><span id="L1628" class="LineNr">1628 </span><span class="Constant">456]</span> +<a name="L1629"></a><span id="L1629" class="LineNr">1629 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1630"></a><span id="L1630" class="LineNr">1630 </span> <span class="Comment"># start on second line, press ctrl-u</span> +<a name="L1631"></a><span id="L1631" class="LineNr">1631 </span> assume-console [ +<a name="L1632"></a><span id="L1632" class="LineNr">1632 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 2</span> +<a name="L1633"></a><span id="L1633" class="LineNr">1633 </span> press ctrl-u +<a name="L1634"></a><span id="L1634" class="LineNr">1634 </span> ] +<a name="L1635"></a><span id="L1635" class="LineNr">1635 </span> run [ +<a name="L1636"></a><span id="L1636" class="LineNr">1636 </span> editor-event-loop screen, console, e +<a name="L1637"></a><span id="L1637" class="LineNr">1637 </span> ] +<a name="L1638"></a><span id="L1638" class="LineNr">1638 </span> <span class="Comment"># cursor deletes to start of line</span> +<a name="L1639"></a><span id="L1639" class="LineNr">1639 </span> screen-should-contain [ +<a name="L1640"></a><span id="L1640" class="LineNr">1640 </span> <span class="Constant"> . .</span> +<a name="L1641"></a><span id="L1641" class="LineNr">1641 </span> <span class="Constant"> .123 .</span> +<a name="L1642"></a><span id="L1642" class="LineNr">1642 </span> <span class="Constant"> .6 .</span> +<a name="L1643"></a><span id="L1643" class="LineNr">1643 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1644"></a><span id="L1644" class="LineNr">1644 </span> <span class="Constant"> . .</span> +<a name="L1645"></a><span id="L1645" class="LineNr">1645 </span> ] +<a name="L1646"></a><span id="L1646" class="LineNr">1646 </span>] +<a name="L1647"></a><span id="L1647" class="LineNr">1647 </span> +<a name="L1648"></a><span id="L1648" class="LineNr">1648 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L1649"></a><span id="L1649" class="LineNr">1649 </span> <span class="Delimiter">{</span> +<a name="L1650"></a><span id="L1650" class="LineNr">1650 </span> delete-to-start-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">21/ctrl-u</span> +<a name="L1651"></a><span id="L1651" class="LineNr">1651 </span> <span class="muControl">break-unless</span> delete-to-start-of-line? +<a name="L1652"></a><span id="L1652" class="LineNr">1652 </span><span class="Constant"> <delete-to-start-of-line-begin></span> +<a name="L1653"></a><span id="L1653" class="LineNr">1653 </span> deleted-cells:&:duplex-list:char <span class="Special"><-</span> delete-to-start-of-line editor +<a name="L1654"></a><span id="L1654" class="LineNr">1654 </span><span class="Constant"> <delete-to-start-of-line-end></span> +<a name="L1655"></a><span id="L1655" class="LineNr">1655 </span> <span class="muControl">return</span> <span class="Constant">1/go-render</span> +<a name="L1656"></a><span id="L1656" class="LineNr">1656 </span> <span class="Delimiter">}</span> +<a name="L1657"></a><span id="L1657" class="LineNr">1657 </span>] +<a name="L1658"></a><span id="L1658" class="LineNr">1658 </span> +<a name="L1659"></a><span id="L1659" class="LineNr">1659 </span><span class="muRecipe">def</span> delete-to-start-of-line editor:&:editor<span class="muRecipe"> -> </span>result:&:duplex-list:char, editor:&:editor [ +<a name="L1660"></a><span id="L1660" class="LineNr">1660 </span> <span class="Constant">local-scope</span> +<a name="L1661"></a><span id="L1661" class="LineNr">1661 </span> <span class="Constant">load-ingredients</span> +<a name="L1662"></a><span id="L1662" class="LineNr">1662 </span> <span class="Comment"># compute range to delete</span> +<a name="L1663"></a><span id="L1663" class="LineNr">1663 </span> init:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<a name="L1664"></a><span id="L1664" class="LineNr">1664 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L1665"></a><span id="L1665" class="LineNr">1665 </span> start:&:duplex-list:char <span class="Special"><-</span> copy before-cursor +<a name="L1666"></a><span id="L1666" class="LineNr">1666 </span> end:&:duplex-list:char <span class="Special"><-</span> next before-cursor +<a name="L1667"></a><span id="L1667" class="LineNr">1667 </span> <span class="Delimiter">{</span> +<a name="L1668"></a><span id="L1668" class="LineNr">1668 </span> at-start-of-text?:bool <span class="Special"><-</span> equal start, init +<a name="L1669"></a><span id="L1669" class="LineNr">1669 </span> <span class="muControl">break-if</span> at-start-of-text? +<a name="L1670"></a><span id="L1670" class="LineNr">1670 </span> curr:char <span class="Special"><-</span> get *start, <span class="Constant">value:offset</span> +<a name="L1671"></a><span id="L1671" class="LineNr">1671 </span> at-start-of-line?:bool <span class="Special"><-</span> equal curr, <span class="Constant">10/newline</span> +<a name="L1672"></a><span id="L1672" class="LineNr">1672 </span> <span class="muControl">break-if</span> at-start-of-line? +<a name="L1673"></a><span id="L1673" class="LineNr">1673 </span> start <span class="Special"><-</span> prev start +<a name="L1674"></a><span id="L1674" class="LineNr">1674 </span> assert start, <span class="Constant">[delete-to-start-of-line tried to move before start of text]</span> +<a name="L1675"></a><span id="L1675" class="LineNr">1675 </span> <span class="muControl">loop</span> +<a name="L1676"></a><span id="L1676" class="LineNr">1676 </span> <span class="Delimiter">}</span> +<a name="L1677"></a><span id="L1677" class="LineNr">1677 </span> <span class="Comment"># snip it out</span> +<a name="L1678"></a><span id="L1678" class="LineNr">1678 </span> result:&:duplex-list:char <span class="Special"><-</span> next start +<a name="L1679"></a><span id="L1679" class="LineNr">1679 </span> remove-between start, end +<a name="L1680"></a><span id="L1680" class="LineNr">1680 </span> <span class="Comment"># adjust cursor</span> +<a name="L1681"></a><span id="L1681" class="LineNr">1681 </span> before-cursor <span class="Special"><-</span> copy start +<a name="L1682"></a><span id="L1682" class="LineNr">1682 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L1683"></a><span id="L1683" class="LineNr">1683 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L1684"></a><span id="L1684" class="LineNr">1684 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, left +<a name="L1685"></a><span id="L1685" class="LineNr">1685 </span>] +<a name="L1686"></a><span id="L1686" class="LineNr">1686 </span> +<a name="L1687"></a><span id="L1687" class="LineNr">1687 </span><span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u-2 [ +<a name="L1688"></a><span id="L1688" class="LineNr">1688 </span> <span class="Constant">local-scope</span> +<a name="L1689"></a><span id="L1689" class="LineNr">1689 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1690"></a><span id="L1690" class="LineNr">1690 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1691"></a><span id="L1691" class="LineNr">1691 </span><span class="Constant">456]</span> +<a name="L1692"></a><span id="L1692" class="LineNr">1692 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1693"></a><span id="L1693" class="LineNr">1693 </span> <span class="Comment"># start on first line (no newline before), press ctrl-u</span> +<a name="L1694"></a><span id="L1694" class="LineNr">1694 </span> assume-console [ +<a name="L1695"></a><span id="L1695" class="LineNr">1695 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span> +<a name="L1696"></a><span id="L1696" class="LineNr">1696 </span> press ctrl-u +<a name="L1697"></a><span id="L1697" class="LineNr">1697 </span> ] +<a name="L1698"></a><span id="L1698" class="LineNr">1698 </span> run [ +<a name="L1699"></a><span id="L1699" class="LineNr">1699 </span> editor-event-loop screen, console, e +<a name="L1700"></a><span id="L1700" class="LineNr">1700 </span> ] +<a name="L1701"></a><span id="L1701" class="LineNr">1701 </span> <span class="Comment"># cursor deletes to start of line</span> +<a name="L1702"></a><span id="L1702" class="LineNr">1702 </span> screen-should-contain [ +<a name="L1703"></a><span id="L1703" class="LineNr">1703 </span> <span class="Constant"> . .</span> +<a name="L1704"></a><span id="L1704" class="LineNr">1704 </span> <span class="Constant"> .3 .</span> +<a name="L1705"></a><span id="L1705" class="LineNr">1705 </span> <span class="Constant"> .456 .</span> +<a name="L1706"></a><span id="L1706" class="LineNr">1706 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1707"></a><span id="L1707" class="LineNr">1707 </span> <span class="Constant"> . .</span> +<a name="L1708"></a><span id="L1708" class="LineNr">1708 </span> ] +<a name="L1709"></a><span id="L1709" class="LineNr">1709 </span>] +<a name="L1710"></a><span id="L1710" class="LineNr">1710 </span> +<a name="L1711"></a><span id="L1711" class="LineNr">1711 </span><span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u-3 [ +<a name="L1712"></a><span id="L1712" class="LineNr">1712 </span> <span class="Constant">local-scope</span> +<a name="L1713"></a><span id="L1713" class="LineNr">1713 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1714"></a><span id="L1714" class="LineNr">1714 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1715"></a><span id="L1715" class="LineNr">1715 </span><span class="Constant">456]</span> +<a name="L1716"></a><span id="L1716" class="LineNr">1716 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1717"></a><span id="L1717" class="LineNr">1717 </span> <span class="Comment"># start past end of line, press ctrl-u</span> +<a name="L1718"></a><span id="L1718" class="LineNr">1718 </span> assume-console [ +<a name="L1719"></a><span id="L1719" class="LineNr">1719 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L1720"></a><span id="L1720" class="LineNr">1720 </span> press ctrl-u +<a name="L1721"></a><span id="L1721" class="LineNr">1721 </span> ] +<a name="L1722"></a><span id="L1722" class="LineNr">1722 </span> run [ +<a name="L1723"></a><span id="L1723" class="LineNr">1723 </span> editor-event-loop screen, console, e +<a name="L1724"></a><span id="L1724" class="LineNr">1724 </span> ] +<a name="L1725"></a><span id="L1725" class="LineNr">1725 </span> <span class="Comment"># cursor deletes to start of line</span> +<a name="L1726"></a><span id="L1726" class="LineNr">1726 </span> screen-should-contain [ +<a name="L1727"></a><span id="L1727" class="LineNr">1727 </span> <span class="Constant"> . .</span> +<a name="L1728"></a><span id="L1728" class="LineNr">1728 </span> <span class="Constant"> . .</span> +<a name="L1729"></a><span id="L1729" class="LineNr">1729 </span> <span class="Constant"> .456 .</span> +<a name="L1730"></a><span id="L1730" class="LineNr">1730 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1731"></a><span id="L1731" class="LineNr">1731 </span> <span class="Constant"> . .</span> +<a name="L1732"></a><span id="L1732" class="LineNr">1732 </span> ] +<a name="L1733"></a><span id="L1733" class="LineNr">1733 </span>] +<a name="L1734"></a><span id="L1734" class="LineNr">1734 </span> +<a name="L1735"></a><span id="L1735" class="LineNr">1735 </span><span class="muScenario">scenario</span> editor-deletes-to-start-of-final-line-with-ctrl-u [ +<a name="L1736"></a><span id="L1736" class="LineNr">1736 </span> <span class="Constant">local-scope</span> +<a name="L1737"></a><span id="L1737" class="LineNr">1737 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1738"></a><span id="L1738" class="LineNr">1738 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1739"></a><span id="L1739" class="LineNr">1739 </span><span class="Constant">456]</span> +<a name="L1740"></a><span id="L1740" class="LineNr">1740 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1741"></a><span id="L1741" class="LineNr">1741 </span> <span class="Comment"># start past end of final line, press ctrl-u</span> +<a name="L1742"></a><span id="L1742" class="LineNr">1742 </span> assume-console [ +<a name="L1743"></a><span id="L1743" class="LineNr">1743 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> +<a name="L1744"></a><span id="L1744" class="LineNr">1744 </span> press ctrl-u +<a name="L1745"></a><span id="L1745" class="LineNr">1745 </span> ] +<a name="L1746"></a><span id="L1746" class="LineNr">1746 </span> run [ +<a name="L1747"></a><span id="L1747" class="LineNr">1747 </span> editor-event-loop screen, console, e +<a name="L1748"></a><span id="L1748" class="LineNr">1748 </span> ] +<a name="L1749"></a><span id="L1749" class="LineNr">1749 </span> <span class="Comment"># cursor deletes to start of line</span> +<a name="L1750"></a><span id="L1750" class="LineNr">1750 </span> screen-should-contain [ +<a name="L1751"></a><span id="L1751" class="LineNr">1751 </span> <span class="Constant"> . .</span> +<a name="L1752"></a><span id="L1752" class="LineNr">1752 </span> <span class="Constant"> .123 .</span> +<a name="L1753"></a><span id="L1753" class="LineNr">1753 </span> <span class="Constant"> . .</span> +<a name="L1754"></a><span id="L1754" class="LineNr">1754 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1755"></a><span id="L1755" class="LineNr">1755 </span> <span class="Constant"> . .</span> +<a name="L1756"></a><span id="L1756" class="LineNr">1756 </span> ] +<a name="L1757"></a><span id="L1757" class="LineNr">1757 </span>] +<a name="L1758"></a><span id="L1758" class="LineNr">1758 </span> +<a name="L1759"></a><span id="L1759" class="LineNr">1759 </span><span class="Comment"># ctrl-k - delete text from cursor to end of line (but not the newline)</span> +<a name="L1760"></a><span id="L1760" class="LineNr">1760 </span> +<a name="L1761"></a><span id="L1761" class="LineNr">1761 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k [ +<a name="L1762"></a><span id="L1762" class="LineNr">1762 </span> <span class="Constant">local-scope</span> +<a name="L1763"></a><span id="L1763" class="LineNr">1763 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1764"></a><span id="L1764" class="LineNr">1764 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1765"></a><span id="L1765" class="LineNr">1765 </span><span class="Constant">456]</span> +<a name="L1766"></a><span id="L1766" class="LineNr">1766 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1767"></a><span id="L1767" class="LineNr">1767 </span> <span class="Comment"># start on first line, press ctrl-k</span> +<a name="L1768"></a><span id="L1768" class="LineNr">1768 </span> assume-console [ +<a name="L1769"></a><span id="L1769" class="LineNr">1769 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 1</span> +<a name="L1770"></a><span id="L1770" class="LineNr">1770 </span> press ctrl-k +<a name="L1771"></a><span id="L1771" class="LineNr">1771 </span> ] +<a name="L1772"></a><span id="L1772" class="LineNr">1772 </span> run [ +<a name="L1773"></a><span id="L1773" class="LineNr">1773 </span> editor-event-loop screen, console, e +<a name="L1774"></a><span id="L1774" class="LineNr">1774 </span> ] +<a name="L1775"></a><span id="L1775" class="LineNr">1775 </span> <span class="Comment"># cursor deletes to end of line</span> +<a name="L1776"></a><span id="L1776" class="LineNr">1776 </span> screen-should-contain [ +<a name="L1777"></a><span id="L1777" class="LineNr">1777 </span> <span class="Constant"> . .</span> +<a name="L1778"></a><span id="L1778" class="LineNr">1778 </span> <span class="Constant"> .1 .</span> +<a name="L1779"></a><span id="L1779" class="LineNr">1779 </span> <span class="Constant"> .456 .</span> +<a name="L1780"></a><span id="L1780" class="LineNr">1780 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1781"></a><span id="L1781" class="LineNr">1781 </span> <span class="Constant"> . .</span> +<a name="L1782"></a><span id="L1782" class="LineNr">1782 </span> ] +<a name="L1783"></a><span id="L1783" class="LineNr">1783 </span>] +<a name="L1784"></a><span id="L1784" class="LineNr">1784 </span> +<a name="L1785"></a><span id="L1785" class="LineNr">1785 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L1786"></a><span id="L1786" class="LineNr">1786 </span> <span class="Delimiter">{</span> +<a name="L1787"></a><span id="L1787" class="LineNr">1787 </span> delete-to-end-of-line?:bool <span class="Special"><-</span> equal c, <span class="Constant">11/ctrl-k</span> +<a name="L1788"></a><span id="L1788" class="LineNr">1788 </span> <span class="muControl">break-unless</span> delete-to-end-of-line? +<a name="L1789"></a><span id="L1789" class="LineNr">1789 </span><span class="Constant"> <delete-to-end-of-line-begin></span> +<a name="L1790"></a><span id="L1790" class="LineNr">1790 </span> deleted-cells:&:duplex-list:char <span class="Special"><-</span> delete-to-end-of-line editor +<a name="L1791"></a><span id="L1791" class="LineNr">1791 </span><span class="Constant"> <delete-to-end-of-line-end></span> +<a name="L1792"></a><span id="L1792" class="LineNr">1792 </span> <span class="muControl">return</span> <span class="Constant">1/go-render</span> +<a name="L1793"></a><span id="L1793" class="LineNr">1793 </span> <span class="Delimiter">}</span> +<a name="L1794"></a><span id="L1794" class="LineNr">1794 </span>] +<a name="L1795"></a><span id="L1795" class="LineNr">1795 </span> +<a name="L1796"></a><span id="L1796" class="LineNr">1796 </span><span class="muRecipe">def</span> delete-to-end-of-line editor:&:editor<span class="muRecipe"> -> </span>result:&:duplex-list:char, editor:&:editor [ +<a name="L1797"></a><span id="L1797" class="LineNr">1797 </span> <span class="Constant">local-scope</span> +<a name="L1798"></a><span id="L1798" class="LineNr">1798 </span> <span class="Constant">load-ingredients</span> +<a name="L1799"></a><span id="L1799" class="LineNr">1799 </span> <span class="Comment"># compute range to delete</span> +<a name="L1800"></a><span id="L1800" class="LineNr">1800 </span> start:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L1801"></a><span id="L1801" class="LineNr">1801 </span> end:&:duplex-list:char <span class="Special"><-</span> next start +<a name="L1802"></a><span id="L1802" class="LineNr">1802 </span> <span class="Delimiter">{</span> +<a name="L1803"></a><span id="L1803" class="LineNr">1803 </span> at-end-of-text?:bool <span class="Special"><-</span> equal end, <span class="Constant">0/null</span> +<a name="L1804"></a><span id="L1804" class="LineNr">1804 </span> <span class="muControl">break-if</span> at-end-of-text? +<a name="L1805"></a><span id="L1805" class="LineNr">1805 </span> curr:char <span class="Special"><-</span> get *end, <span class="Constant">value:offset</span> +<a name="L1806"></a><span id="L1806" class="LineNr">1806 </span> at-end-of-line?:bool <span class="Special"><-</span> equal curr, <span class="Constant">10/newline</span> +<a name="L1807"></a><span id="L1807" class="LineNr">1807 </span> <span class="muControl">break-if</span> at-end-of-line? +<a name="L1808"></a><span id="L1808" class="LineNr">1808 </span> end <span class="Special"><-</span> next end +<a name="L1809"></a><span id="L1809" class="LineNr">1809 </span> <span class="muControl">loop</span> +<a name="L1810"></a><span id="L1810" class="LineNr">1810 </span> <span class="Delimiter">}</span> +<a name="L1811"></a><span id="L1811" class="LineNr">1811 </span> <span class="Comment"># snip it out</span> +<a name="L1812"></a><span id="L1812" class="LineNr">1812 </span> result <span class="Special"><-</span> next start +<a name="L1813"></a><span id="L1813" class="LineNr">1813 </span> remove-between start, end +<a name="L1814"></a><span id="L1814" class="LineNr">1814 </span>] +<a name="L1815"></a><span id="L1815" class="LineNr">1815 </span> +<a name="L1816"></a><span id="L1816" class="LineNr">1816 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-2 [ +<a name="L1817"></a><span id="L1817" class="LineNr">1817 </span> <span class="Constant">local-scope</span> +<a name="L1818"></a><span id="L1818" class="LineNr">1818 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1819"></a><span id="L1819" class="LineNr">1819 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1820"></a><span id="L1820" class="LineNr">1820 </span><span class="Constant">456]</span> +<a name="L1821"></a><span id="L1821" class="LineNr">1821 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1822"></a><span id="L1822" class="LineNr">1822 </span> <span class="Comment"># start on second line (no newline after), press ctrl-k</span> +<a name="L1823"></a><span id="L1823" class="LineNr">1823 </span> assume-console [ +<a name="L1824"></a><span id="L1824" class="LineNr">1824 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 1</span> +<a name="L1825"></a><span id="L1825" class="LineNr">1825 </span> press ctrl-k +<a name="L1826"></a><span id="L1826" class="LineNr">1826 </span> ] +<a name="L1827"></a><span id="L1827" class="LineNr">1827 </span> run [ +<a name="L1828"></a><span id="L1828" class="LineNr">1828 </span> editor-event-loop screen, console, e +<a name="L1829"></a><span id="L1829" class="LineNr">1829 </span> ] +<a name="L1830"></a><span id="L1830" class="LineNr">1830 </span> <span class="Comment"># cursor deletes to end of line</span> +<a name="L1831"></a><span id="L1831" class="LineNr">1831 </span> screen-should-contain [ +<a name="L1832"></a><span id="L1832" class="LineNr">1832 </span> <span class="Constant"> . .</span> +<a name="L1833"></a><span id="L1833" class="LineNr">1833 </span> <span class="Constant"> .123 .</span> +<a name="L1834"></a><span id="L1834" class="LineNr">1834 </span> <span class="Constant"> .4 .</span> +<a name="L1835"></a><span id="L1835" class="LineNr">1835 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1836"></a><span id="L1836" class="LineNr">1836 </span> <span class="Constant"> . .</span> +<a name="L1837"></a><span id="L1837" class="LineNr">1837 </span> ] +<a name="L1838"></a><span id="L1838" class="LineNr">1838 </span>] +<a name="L1839"></a><span id="L1839" class="LineNr">1839 </span> +<a name="L1840"></a><span id="L1840" class="LineNr">1840 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-3 [ +<a name="L1841"></a><span id="L1841" class="LineNr">1841 </span> <span class="Constant">local-scope</span> +<a name="L1842"></a><span id="L1842" class="LineNr">1842 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1843"></a><span id="L1843" class="LineNr">1843 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1844"></a><span id="L1844" class="LineNr">1844 </span><span class="Constant">456]</span> +<a name="L1845"></a><span id="L1845" class="LineNr">1845 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1846"></a><span id="L1846" class="LineNr">1846 </span> <span class="Comment"># start at end of line</span> +<a name="L1847"></a><span id="L1847" class="LineNr">1847 </span> assume-console [ +<a name="L1848"></a><span id="L1848" class="LineNr">1848 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 2</span> +<a name="L1849"></a><span id="L1849" class="LineNr">1849 </span> press ctrl-k +<a name="L1850"></a><span id="L1850" class="LineNr">1850 </span> ] +<a name="L1851"></a><span id="L1851" class="LineNr">1851 </span> run [ +<a name="L1852"></a><span id="L1852" class="LineNr">1852 </span> editor-event-loop screen, console, e +<a name="L1853"></a><span id="L1853" class="LineNr">1853 </span> ] +<a name="L1854"></a><span id="L1854" class="LineNr">1854 </span> <span class="Comment"># cursor deletes just last character</span> +<a name="L1855"></a><span id="L1855" class="LineNr">1855 </span> screen-should-contain [ +<a name="L1856"></a><span id="L1856" class="LineNr">1856 </span> <span class="Constant"> . .</span> +<a name="L1857"></a><span id="L1857" class="LineNr">1857 </span> <span class="Constant"> .12 .</span> +<a name="L1858"></a><span id="L1858" class="LineNr">1858 </span> <span class="Constant"> .456 .</span> +<a name="L1859"></a><span id="L1859" class="LineNr">1859 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1860"></a><span id="L1860" class="LineNr">1860 </span> <span class="Constant"> . .</span> +<a name="L1861"></a><span id="L1861" class="LineNr">1861 </span> ] +<a name="L1862"></a><span id="L1862" class="LineNr">1862 </span>] +<a name="L1863"></a><span id="L1863" class="LineNr">1863 </span> +<a name="L1864"></a><span id="L1864" class="LineNr">1864 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-4 [ +<a name="L1865"></a><span id="L1865" class="LineNr">1865 </span> <span class="Constant">local-scope</span> +<a name="L1866"></a><span id="L1866" class="LineNr">1866 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1867"></a><span id="L1867" class="LineNr">1867 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1868"></a><span id="L1868" class="LineNr">1868 </span><span class="Constant">456]</span> +<a name="L1869"></a><span id="L1869" class="LineNr">1869 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1870"></a><span id="L1870" class="LineNr">1870 </span> <span class="Comment"># start past end of line</span> +<a name="L1871"></a><span id="L1871" class="LineNr">1871 </span> assume-console [ +<a name="L1872"></a><span id="L1872" class="LineNr">1872 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 3</span> +<a name="L1873"></a><span id="L1873" class="LineNr">1873 </span> press ctrl-k +<a name="L1874"></a><span id="L1874" class="LineNr">1874 </span> ] +<a name="L1875"></a><span id="L1875" class="LineNr">1875 </span> run [ +<a name="L1876"></a><span id="L1876" class="LineNr">1876 </span> editor-event-loop screen, console, e +<a name="L1877"></a><span id="L1877" class="LineNr">1877 </span> ] +<a name="L1878"></a><span id="L1878" class="LineNr">1878 </span> <span class="Comment"># cursor deletes nothing</span> +<a name="L1879"></a><span id="L1879" class="LineNr">1879 </span> screen-should-contain [ +<a name="L1880"></a><span id="L1880" class="LineNr">1880 </span> <span class="Constant"> . .</span> +<a name="L1881"></a><span id="L1881" class="LineNr">1881 </span> <span class="Constant"> .123 .</span> +<a name="L1882"></a><span id="L1882" class="LineNr">1882 </span> <span class="Constant"> .456 .</span> +<a name="L1883"></a><span id="L1883" class="LineNr">1883 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1884"></a><span id="L1884" class="LineNr">1884 </span> <span class="Constant"> . .</span> +<a name="L1885"></a><span id="L1885" class="LineNr">1885 </span> ] +<a name="L1886"></a><span id="L1886" class="LineNr">1886 </span>] +<a name="L1887"></a><span id="L1887" class="LineNr">1887 </span> +<a name="L1888"></a><span id="L1888" class="LineNr">1888 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-5 [ +<a name="L1889"></a><span id="L1889" class="LineNr">1889 </span> <span class="Constant">local-scope</span> +<a name="L1890"></a><span id="L1890" class="LineNr">1890 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1891"></a><span id="L1891" class="LineNr">1891 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1892"></a><span id="L1892" class="LineNr">1892 </span><span class="Constant">456]</span> +<a name="L1893"></a><span id="L1893" class="LineNr">1893 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1894"></a><span id="L1894" class="LineNr">1894 </span> <span class="Comment"># start at end of text</span> +<a name="L1895"></a><span id="L1895" class="LineNr">1895 </span> assume-console [ +<a name="L1896"></a><span id="L1896" class="LineNr">1896 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 2</span> +<a name="L1897"></a><span id="L1897" class="LineNr">1897 </span> press ctrl-k +<a name="L1898"></a><span id="L1898" class="LineNr">1898 </span> ] +<a name="L1899"></a><span id="L1899" class="LineNr">1899 </span> run [ +<a name="L1900"></a><span id="L1900" class="LineNr">1900 </span> editor-event-loop screen, console, e +<a name="L1901"></a><span id="L1901" class="LineNr">1901 </span> ] +<a name="L1902"></a><span id="L1902" class="LineNr">1902 </span> <span class="Comment"># cursor deletes just the final character</span> +<a name="L1903"></a><span id="L1903" class="LineNr">1903 </span> screen-should-contain [ +<a name="L1904"></a><span id="L1904" class="LineNr">1904 </span> <span class="Constant"> . .</span> +<a name="L1905"></a><span id="L1905" class="LineNr">1905 </span> <span class="Constant"> .123 .</span> +<a name="L1906"></a><span id="L1906" class="LineNr">1906 </span> <span class="Constant"> .45 .</span> +<a name="L1907"></a><span id="L1907" class="LineNr">1907 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1908"></a><span id="L1908" class="LineNr">1908 </span> <span class="Constant"> . .</span> +<a name="L1909"></a><span id="L1909" class="LineNr">1909 </span> ] +<a name="L1910"></a><span id="L1910" class="LineNr">1910 </span>] +<a name="L1911"></a><span id="L1911" class="LineNr">1911 </span> +<a name="L1912"></a><span id="L1912" class="LineNr">1912 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-6 [ +<a name="L1913"></a><span id="L1913" class="LineNr">1913 </span> <span class="Constant">local-scope</span> +<a name="L1914"></a><span id="L1914" class="LineNr">1914 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L1915"></a><span id="L1915" class="LineNr">1915 </span> s:text <span class="Special"><-</span> new <span class="Constant">[123</span> +<a name="L1916"></a><span id="L1916" class="LineNr">1916 </span><span class="Constant">456]</span> +<a name="L1917"></a><span id="L1917" class="LineNr">1917 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1918"></a><span id="L1918" class="LineNr">1918 </span> <span class="Comment"># start past end of text</span> +<a name="L1919"></a><span id="L1919" class="LineNr">1919 </span> assume-console [ +<a name="L1920"></a><span id="L1920" class="LineNr">1920 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 3</span> +<a name="L1921"></a><span id="L1921" class="LineNr">1921 </span> press ctrl-k +<a name="L1922"></a><span id="L1922" class="LineNr">1922 </span> ] +<a name="L1923"></a><span id="L1923" class="LineNr">1923 </span> run [ +<a name="L1924"></a><span id="L1924" class="LineNr">1924 </span> editor-event-loop screen, console, e +<a name="L1925"></a><span id="L1925" class="LineNr">1925 </span> ] +<a name="L1926"></a><span id="L1926" class="LineNr">1926 </span> <span class="Comment"># cursor deletes nothing</span> +<a name="L1927"></a><span id="L1927" class="LineNr">1927 </span> screen-should-contain [ +<a name="L1928"></a><span id="L1928" class="LineNr">1928 </span> <span class="Constant"> . .</span> +<a name="L1929"></a><span id="L1929" class="LineNr">1929 </span> <span class="Constant"> .123 .</span> +<a name="L1930"></a><span id="L1930" class="LineNr">1930 </span> <span class="Constant"> .456 .</span> +<a name="L1931"></a><span id="L1931" class="LineNr">1931 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L1932"></a><span id="L1932" class="LineNr">1932 </span> <span class="Constant"> . .</span> +<a name="L1933"></a><span id="L1933" class="LineNr">1933 </span> ] +<a name="L1934"></a><span id="L1934" class="LineNr">1934 </span>] +<a name="L1935"></a><span id="L1935" class="LineNr">1935 </span> +<a name="L1936"></a><span id="L1936" class="LineNr">1936 </span><span class="Comment"># cursor-down can scroll if necessary</span> +<a name="L1937"></a><span id="L1937" class="LineNr">1937 </span> +<a name="L1938"></a><span id="L1938" class="LineNr">1938 </span><span class="muScenario">scenario</span> editor-can-scroll-down-using-arrow-keys [ +<a name="L1939"></a><span id="L1939" class="LineNr">1939 </span> <span class="Constant">local-scope</span> +<a name="L1940"></a><span id="L1940" class="LineNr">1940 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L1941"></a><span id="L1941" class="LineNr">1941 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L1942"></a><span id="L1942" class="LineNr">1942 </span> <span class="Comment"># initialize editor with >3 lines</span> +<a name="L1943"></a><span id="L1943" class="LineNr">1943 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L1944"></a><span id="L1944" class="LineNr">1944 </span><span class="Constant">b</span> +<a name="L1945"></a><span id="L1945" class="LineNr">1945 </span><span class="Constant">c</span> +<a name="L1946"></a><span id="L1946" class="LineNr">1946 </span><span class="Constant">d]</span> +<a name="L1947"></a><span id="L1947" class="LineNr">1947 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L1948"></a><span id="L1948" class="LineNr">1948 </span> editor-render screen, e +<a name="L1949"></a><span id="L1949" class="LineNr">1949 </span> screen-should-contain [ +<a name="L1950"></a><span id="L1950" class="LineNr">1950 </span> <span class="Constant"> . .</span> +<a name="L1951"></a><span id="L1951" class="LineNr">1951 </span> <span class="Constant"> .a .</span> +<a name="L1952"></a><span id="L1952" class="LineNr">1952 </span> <span class="Constant"> .b .</span> +<a name="L1953"></a><span id="L1953" class="LineNr">1953 </span> <span class="Constant"> .c .</span> +<a name="L1954"></a><span id="L1954" class="LineNr">1954 </span> ] +<a name="L1955"></a><span id="L1955" class="LineNr">1955 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> +<a name="L1956"></a><span id="L1956" class="LineNr">1956 </span> assume-console [ +<a name="L1957"></a><span id="L1957" class="LineNr">1957 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L1958"></a><span id="L1958" class="LineNr">1958 </span> press down-arrow +<a name="L1959"></a><span id="L1959" class="LineNr">1959 </span> ] +<a name="L1960"></a><span id="L1960" class="LineNr">1960 </span> run [ +<a name="L1961"></a><span id="L1961" class="LineNr">1961 </span> editor-event-loop screen, console, e +<a name="L1962"></a><span id="L1962" class="LineNr">1962 </span> ] +<a name="L1963"></a><span id="L1963" class="LineNr">1963 </span> <span class="Comment"># screen slides by one line</span> +<a name="L1964"></a><span id="L1964" class="LineNr">1964 </span> screen-should-contain [ +<a name="L1965"></a><span id="L1965" class="LineNr">1965 </span> <span class="Constant"> . .</span> +<a name="L1966"></a><span id="L1966" class="LineNr">1966 </span> <span class="Constant"> .b .</span> +<a name="L1967"></a><span id="L1967" class="LineNr">1967 </span> <span class="Constant"> .c .</span> +<a name="L1968"></a><span id="L1968" class="LineNr">1968 </span> <span class="Constant"> .d .</span> +<a name="L1969"></a><span id="L1969" class="LineNr">1969 </span> ] +<a name="L1970"></a><span id="L1970" class="LineNr">1970 </span>] +<a name="L1971"></a><span id="L1971" class="LineNr">1971 </span> +<a name="L1972"></a><span id="L1972" class="LineNr">1972 </span><span class="muRecipe">after</span> <span class="Constant"><scroll-down></span> [ +<a name="L1973"></a><span id="L1973" class="LineNr">1973 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll down]</span> +<a name="L1974"></a><span id="L1974" class="LineNr">1974 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L1975"></a><span id="L1975" class="LineNr">1975 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L1976"></a><span id="L1976" class="LineNr">1976 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L1977"></a><span id="L1977" class="LineNr">1977 </span> max:num <span class="Special"><-</span> subtract right, left +<a name="L1978"></a><span id="L1978" class="LineNr">1978 </span> old-top:&:duplex-list:char <span class="Special"><-</span> copy top-of-screen +<a name="L1979"></a><span id="L1979" class="LineNr">1979 </span> top-of-screen <span class="Special"><-</span> before-start-of-next-line top-of-screen, max +<a name="L1980"></a><span id="L1980" class="LineNr">1980 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen +<a name="L1981"></a><span id="L1981" class="LineNr">1981 </span> no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen +<a name="L1982"></a><span id="L1982" class="LineNr">1982 </span> <span class="muControl">return-if</span> no-movement?, <span class="Constant">0/don't-render</span> +<a name="L1983"></a><span id="L1983" class="LineNr">1983 </span>] +<a name="L1984"></a><span id="L1984" class="LineNr">1984 </span> +<a name="L1985"></a><span id="L1985" class="LineNr">1985 </span><span class="Comment"># takes a pointer into the doubly-linked list, scans ahead at most 'max'</span> +<a name="L1986"></a><span id="L1986" class="LineNr">1986 </span><span class="Comment"># positions until the next newline</span> +<a name="L1987"></a><span id="L1987" class="LineNr">1987 </span><span class="Comment"># beware: never return null pointer.</span> +<a name="L1988"></a><span id="L1988" class="LineNr">1988 </span><span class="muRecipe">def</span> before-start-of-next-line original:&:duplex-list:char, max:num<span class="muRecipe"> -> </span>curr:&:duplex-list:char [ +<a name="L1989"></a><span id="L1989" class="LineNr">1989 </span> <span class="Constant">local-scope</span> +<a name="L1990"></a><span id="L1990" class="LineNr">1990 </span> <span class="Constant">load-ingredients</span> +<a name="L1991"></a><span id="L1991" class="LineNr">1991 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<a name="L1992"></a><span id="L1992" class="LineNr">1992 </span> curr:&:duplex-list:char <span class="Special"><-</span> copy original +<a name="L1993"></a><span id="L1993" class="LineNr">1993 </span> <span class="Comment"># skip the initial newline if it exists</span> +<a name="L1994"></a><span id="L1994" class="LineNr">1994 </span> <span class="Delimiter">{</span> +<a name="L1995"></a><span id="L1995" class="LineNr">1995 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L1996"></a><span id="L1996" class="LineNr">1996 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> +<a name="L1997"></a><span id="L1997" class="LineNr">1997 </span> <span class="muControl">break-unless</span> at-newline? +<a name="L1998"></a><span id="L1998" class="LineNr">1998 </span> curr <span class="Special"><-</span> next curr +<a name="L1999"></a><span id="L1999" class="LineNr">1999 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<a name="L2000"></a><span id="L2000" class="LineNr">2000 </span> <span class="Delimiter">}</span> +<a name="L2001"></a><span id="L2001" class="LineNr">2001 </span> <span class="Delimiter">{</span> +<a name="L2002"></a><span id="L2002" class="LineNr">2002 </span> <span class="muControl">return-unless</span> curr, original +<a name="L2003"></a><span id="L2003" class="LineNr">2003 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max +<a name="L2004"></a><span id="L2004" class="LineNr">2004 </span> <span class="muControl">break-if</span> done? +<a name="L2005"></a><span id="L2005" class="LineNr">2005 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L2006"></a><span id="L2006" class="LineNr">2006 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> +<a name="L2007"></a><span id="L2007" class="LineNr">2007 </span> <span class="muControl">break-if</span> at-newline? +<a name="L2008"></a><span id="L2008" class="LineNr">2008 </span> curr <span class="Special"><-</span> next curr +<a name="L2009"></a><span id="L2009" class="LineNr">2009 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<a name="L2010"></a><span id="L2010" class="LineNr">2010 </span> <span class="muControl">loop</span> +<a name="L2011"></a><span id="L2011" class="LineNr">2011 </span> <span class="Delimiter">}</span> +<a name="L2012"></a><span id="L2012" class="LineNr">2012 </span> <span class="muControl">return-unless</span> curr, original +<a name="L2013"></a><span id="L2013" class="LineNr">2013 </span> <span class="muControl">return</span> curr +<a name="L2014"></a><span id="L2014" class="LineNr">2014 </span>] +<a name="L2015"></a><span id="L2015" class="LineNr">2015 </span> +<a name="L2016"></a><span id="L2016" class="LineNr">2016 </span><span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys [ +<a name="L2017"></a><span id="L2017" class="LineNr">2017 </span> <span class="Constant">local-scope</span> +<a name="L2018"></a><span id="L2018" class="LineNr">2018 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2019"></a><span id="L2019" class="LineNr">2019 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2020"></a><span id="L2020" class="LineNr">2020 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> +<a name="L2021"></a><span id="L2021" class="LineNr">2021 </span> <span class="Comment"># other lines</span> +<a name="L2022"></a><span id="L2022" class="LineNr">2022 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<a name="L2023"></a><span id="L2023" class="LineNr">2023 </span><span class="Constant">g</span> +<a name="L2024"></a><span id="L2024" class="LineNr">2024 </span><span class="Constant">h</span> +<a name="L2025"></a><span id="L2025" class="LineNr">2025 </span><span class="Constant">i]</span> +<a name="L2026"></a><span id="L2026" class="LineNr">2026 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2027"></a><span id="L2027" class="LineNr">2027 </span> editor-render screen, e +<a name="L2028"></a><span id="L2028" class="LineNr">2028 </span> screen-should-contain [ +<a name="L2029"></a><span id="L2029" class="LineNr">2029 </span> <span class="Constant"> . .</span> +<a name="L2030"></a><span id="L2030" class="LineNr">2030 </span> <span class="Constant"> .abcd↩ .</span> +<a name="L2031"></a><span id="L2031" class="LineNr">2031 </span> <span class="Constant"> .ef .</span> +<a name="L2032"></a><span id="L2032" class="LineNr">2032 </span> <span class="Constant"> .g .</span> +<a name="L2033"></a><span id="L2033" class="LineNr">2033 </span> ] +<a name="L2034"></a><span id="L2034" class="LineNr">2034 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> +<a name="L2035"></a><span id="L2035" class="LineNr">2035 </span> assume-console [ +<a name="L2036"></a><span id="L2036" class="LineNr">2036 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L2037"></a><span id="L2037" class="LineNr">2037 </span> press down-arrow +<a name="L2038"></a><span id="L2038" class="LineNr">2038 </span> ] +<a name="L2039"></a><span id="L2039" class="LineNr">2039 </span> run [ +<a name="L2040"></a><span id="L2040" class="LineNr">2040 </span> editor-event-loop screen, console, e +<a name="L2041"></a><span id="L2041" class="LineNr">2041 </span> ] +<a name="L2042"></a><span id="L2042" class="LineNr">2042 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2043"></a><span id="L2043" class="LineNr">2043 </span> screen-should-contain [ +<a name="L2044"></a><span id="L2044" class="LineNr">2044 </span> <span class="Constant"> . .</span> +<a name="L2045"></a><span id="L2045" class="LineNr">2045 </span> <span class="Constant"> .ef .</span> +<a name="L2046"></a><span id="L2046" class="LineNr">2046 </span> <span class="Constant"> .g .</span> +<a name="L2047"></a><span id="L2047" class="LineNr">2047 </span> <span class="Constant"> .h .</span> +<a name="L2048"></a><span id="L2048" class="LineNr">2048 </span> ] +<a name="L2049"></a><span id="L2049" class="LineNr">2049 </span>] +<a name="L2050"></a><span id="L2050" class="LineNr">2050 </span> +<a name="L2051"></a><span id="L2051" class="LineNr">2051 </span><span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys-2 [ +<a name="L2052"></a><span id="L2052" class="LineNr">2052 </span> <span class="Constant">local-scope</span> +<a name="L2053"></a><span id="L2053" class="LineNr">2053 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2054"></a><span id="L2054" class="LineNr">2054 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2055"></a><span id="L2055" class="LineNr">2055 </span> <span class="Comment"># editor starts with a long line wrapping twice</span> +<a name="L2056"></a><span id="L2056" class="LineNr">2056 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> +<a name="L2057"></a><span id="L2057" class="LineNr">2057 </span><span class="Constant">k</span> +<a name="L2058"></a><span id="L2058" class="LineNr">2058 </span><span class="Constant">l</span> +<a name="L2059"></a><span id="L2059" class="LineNr">2059 </span><span class="Constant">m]</span> +<a name="L2060"></a><span id="L2060" class="LineNr">2060 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2061"></a><span id="L2061" class="LineNr">2061 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> +<a name="L2062"></a><span id="L2062" class="LineNr">2062 </span> assume-console [ +<a name="L2063"></a><span id="L2063" class="LineNr">2063 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L2064"></a><span id="L2064" class="LineNr">2064 </span> press down-arrow +<a name="L2065"></a><span id="L2065" class="LineNr">2065 </span> ] +<a name="L2066"></a><span id="L2066" class="LineNr">2066 </span> run [ +<a name="L2067"></a><span id="L2067" class="LineNr">2067 </span> editor-event-loop screen, console, e +<a name="L2068"></a><span id="L2068" class="LineNr">2068 </span> ] +<a name="L2069"></a><span id="L2069" class="LineNr">2069 </span> <span class="Comment"># screen shows partial wrapped line containing a wrap icon</span> +<a name="L2070"></a><span id="L2070" class="LineNr">2070 </span> screen-should-contain [ +<a name="L2071"></a><span id="L2071" class="LineNr">2071 </span> <span class="Constant"> . .</span> +<a name="L2072"></a><span id="L2072" class="LineNr">2072 </span> <span class="Constant"> .efgh↩ .</span> +<a name="L2073"></a><span id="L2073" class="LineNr">2073 </span> <span class="Constant"> .ij .</span> +<a name="L2074"></a><span id="L2074" class="LineNr">2074 </span> <span class="Constant"> .k .</span> +<a name="L2075"></a><span id="L2075" class="LineNr">2075 </span> ] +<a name="L2076"></a><span id="L2076" class="LineNr">2076 </span> <span class="Comment"># scroll down again</span> +<a name="L2077"></a><span id="L2077" class="LineNr">2077 </span> assume-console [ +<a name="L2078"></a><span id="L2078" class="LineNr">2078 </span> press down-arrow +<a name="L2079"></a><span id="L2079" class="LineNr">2079 </span> ] +<a name="L2080"></a><span id="L2080" class="LineNr">2080 </span> run [ +<a name="L2081"></a><span id="L2081" class="LineNr">2081 </span> editor-event-loop screen, console, e +<a name="L2082"></a><span id="L2082" class="LineNr">2082 </span> ] +<a name="L2083"></a><span id="L2083" class="LineNr">2083 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2084"></a><span id="L2084" class="LineNr">2084 </span> screen-should-contain [ +<a name="L2085"></a><span id="L2085" class="LineNr">2085 </span> <span class="Constant"> . .</span> +<a name="L2086"></a><span id="L2086" class="LineNr">2086 </span> <span class="Constant"> .ij .</span> +<a name="L2087"></a><span id="L2087" class="LineNr">2087 </span> <span class="Constant"> .k .</span> +<a name="L2088"></a><span id="L2088" class="LineNr">2088 </span> <span class="Constant"> .l .</span> +<a name="L2089"></a><span id="L2089" class="LineNr">2089 </span> ] +<a name="L2090"></a><span id="L2090" class="LineNr">2090 </span>] +<a name="L2091"></a><span id="L2091" class="LineNr">2091 </span> +<a name="L2092"></a><span id="L2092" class="LineNr">2092 </span><span class="muScenario">scenario</span> editor-scrolls-down-when-line-wraps [ +<a name="L2093"></a><span id="L2093" class="LineNr">2093 </span> <span class="Constant">local-scope</span> +<a name="L2094"></a><span id="L2094" class="LineNr">2094 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2095"></a><span id="L2095" class="LineNr">2095 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<a name="L2096"></a><span id="L2096" class="LineNr">2096 </span> <span class="Comment"># editor contains a long line in the third line</span> +<a name="L2097"></a><span id="L2097" class="LineNr">2097 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2098"></a><span id="L2098" class="LineNr">2098 </span><span class="Constant">b</span> +<a name="L2099"></a><span id="L2099" class="LineNr">2099 </span><span class="Constant">cdef]</span> +<a name="L2100"></a><span id="L2100" class="LineNr">2100 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2101"></a><span id="L2101" class="LineNr">2101 </span> <span class="Comment"># position cursor at end, type a character</span> +<a name="L2102"></a><span id="L2102" class="LineNr">2102 </span> assume-console [ +<a name="L2103"></a><span id="L2103" class="LineNr">2103 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> +<a name="L2104"></a><span id="L2104" class="LineNr">2104 </span> type <span class="Constant">[g]</span> +<a name="L2105"></a><span id="L2105" class="LineNr">2105 </span> ] +<a name="L2106"></a><span id="L2106" class="LineNr">2106 </span> run [ +<a name="L2107"></a><span id="L2107" class="LineNr">2107 </span> editor-event-loop screen, console, e +<a name="L2108"></a><span id="L2108" class="LineNr">2108 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2109"></a><span id="L2109" class="LineNr">2109 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2110"></a><span id="L2110" class="LineNr">2110 </span> ] +<a name="L2111"></a><span id="L2111" class="LineNr">2111 </span> <span class="Comment"># screen scrolls</span> +<a name="L2112"></a><span id="L2112" class="LineNr">2112 </span> screen-should-contain [ +<a name="L2113"></a><span id="L2113" class="LineNr">2113 </span> <span class="Constant"> . .</span> +<a name="L2114"></a><span id="L2114" class="LineNr">2114 </span> <span class="Constant"> .b .</span> +<a name="L2115"></a><span id="L2115" class="LineNr">2115 </span><span class="Constant"> .cdef↩.</span> +<a name="L2116"></a><span id="L2116" class="LineNr">2116 </span> <span class="Constant"> .g .</span> +<a name="L2117"></a><span id="L2117" class="LineNr">2117 </span> ] +<a name="L2118"></a><span id="L2118" class="LineNr">2118 </span> memory-should-contain [ +<a name="L2119"></a><span id="L2119" class="LineNr">2119 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L2120"></a><span id="L2120" class="LineNr">2120 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L2121"></a><span id="L2121" class="LineNr">2121 </span> ] +<a name="L2122"></a><span id="L2122" class="LineNr">2122 </span>] +<a name="L2123"></a><span id="L2123" class="LineNr">2123 </span> +<a name="L2124"></a><span id="L2124" class="LineNr">2124 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-newline [ +<a name="L2125"></a><span id="L2125" class="LineNr">2125 </span> <span class="Constant">local-scope</span> +<a name="L2126"></a><span id="L2126" class="LineNr">2126 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<a name="L2127"></a><span id="L2127" class="LineNr">2127 </span> <span class="Comment"># position cursor after last line and type newline</span> +<a name="L2128"></a><span id="L2128" class="LineNr">2128 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2129"></a><span id="L2129" class="LineNr">2129 </span><span class="Constant">b</span> +<a name="L2130"></a><span id="L2130" class="LineNr">2130 </span><span class="Constant">c]</span> +<a name="L2131"></a><span id="L2131" class="LineNr">2131 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2132"></a><span id="L2132" class="LineNr">2132 </span> assume-console [ +<a name="L2133"></a><span id="L2133" class="LineNr">2133 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> +<a name="L2134"></a><span id="L2134" class="LineNr">2134 </span> type [ +<a name="L2135"></a><span id="L2135" class="LineNr">2135 </span>] +<a name="L2136"></a><span id="L2136" class="LineNr">2136 </span> ] +<a name="L2137"></a><span id="L2137" class="LineNr">2137 </span> run [ +<a name="L2138"></a><span id="L2138" class="LineNr">2138 </span> editor-event-loop screen, console, e +<a name="L2139"></a><span id="L2139" class="LineNr">2139 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2140"></a><span id="L2140" class="LineNr">2140 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2141"></a><span id="L2141" class="LineNr">2141 </span> ] +<a name="L2142"></a><span id="L2142" class="LineNr">2142 </span> <span class="Comment"># screen scrolls</span> +<a name="L2143"></a><span id="L2143" class="LineNr">2143 </span> screen-should-contain [ +<a name="L2144"></a><span id="L2144" class="LineNr">2144 </span> <span class="Constant"> . .</span> +<a name="L2145"></a><span id="L2145" class="LineNr">2145 </span> <span class="Constant"> .b .</span> +<a name="L2146"></a><span id="L2146" class="LineNr">2146 </span> <span class="Constant"> .c .</span> +<a name="L2147"></a><span id="L2147" class="LineNr">2147 </span> <span class="Constant"> . .</span> +<a name="L2148"></a><span id="L2148" class="LineNr">2148 </span> ] +<a name="L2149"></a><span id="L2149" class="LineNr">2149 </span> memory-should-contain [ +<a name="L2150"></a><span id="L2150" class="LineNr">2150 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L2151"></a><span id="L2151" class="LineNr">2151 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L2152"></a><span id="L2152" class="LineNr">2152 </span> ] +<a name="L2153"></a><span id="L2153" class="LineNr">2153 </span>] +<a name="L2154"></a><span id="L2154" class="LineNr">2154 </span> +<a name="L2155"></a><span id="L2155" class="LineNr">2155 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow [ +<a name="L2156"></a><span id="L2156" class="LineNr">2156 </span> <span class="Constant">local-scope</span> +<a name="L2157"></a><span id="L2157" class="LineNr">2157 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2158"></a><span id="L2158" class="LineNr">2158 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<a name="L2159"></a><span id="L2159" class="LineNr">2159 </span> <span class="Comment"># editor contains a wrapped line</span> +<a name="L2160"></a><span id="L2160" class="LineNr">2160 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2161"></a><span id="L2161" class="LineNr">2161 </span><span class="Constant">b</span> +<a name="L2162"></a><span id="L2162" class="LineNr">2162 </span><span class="Constant">cdefgh]</span> +<a name="L2163"></a><span id="L2163" class="LineNr">2163 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2164"></a><span id="L2164" class="LineNr">2164 </span> <span class="Comment"># position cursor at end of screen and try to move right</span> +<a name="L2165"></a><span id="L2165" class="LineNr">2165 </span> assume-console [ +<a name="L2166"></a><span id="L2166" class="LineNr">2166 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> +<a name="L2167"></a><span id="L2167" class="LineNr">2167 </span> press right-arrow +<a name="L2168"></a><span id="L2168" class="LineNr">2168 </span> ] +<a name="L2169"></a><span id="L2169" class="LineNr">2169 </span> run [ +<a name="L2170"></a><span id="L2170" class="LineNr">2170 </span> editor-event-loop screen, console, e +<a name="L2171"></a><span id="L2171" class="LineNr">2171 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2172"></a><span id="L2172" class="LineNr">2172 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2173"></a><span id="L2173" class="LineNr">2173 </span> ] +<a name="L2174"></a><span id="L2174" class="LineNr">2174 </span> <span class="Comment"># screen scrolls</span> +<a name="L2175"></a><span id="L2175" class="LineNr">2175 </span> screen-should-contain [ +<a name="L2176"></a><span id="L2176" class="LineNr">2176 </span> <span class="Constant"> . .</span> +<a name="L2177"></a><span id="L2177" class="LineNr">2177 </span> <span class="Constant"> .b .</span> +<a name="L2178"></a><span id="L2178" class="LineNr">2178 </span><span class="Constant"> .cdef↩.</span> +<a name="L2179"></a><span id="L2179" class="LineNr">2179 </span> <span class="Constant"> .gh .</span> +<a name="L2180"></a><span id="L2180" class="LineNr">2180 </span> ] +<a name="L2181"></a><span id="L2181" class="LineNr">2181 </span> memory-should-contain [ +<a name="L2182"></a><span id="L2182" class="LineNr">2182 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L2183"></a><span id="L2183" class="LineNr">2183 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L2184"></a><span id="L2184" class="LineNr">2184 </span> ] +<a name="L2185"></a><span id="L2185" class="LineNr">2185 </span>] +<a name="L2186"></a><span id="L2186" class="LineNr">2186 </span> +<a name="L2187"></a><span id="L2187" class="LineNr">2187 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow-2 [ +<a name="L2188"></a><span id="L2188" class="LineNr">2188 </span> <span class="Constant">local-scope</span> +<a name="L2189"></a><span id="L2189" class="LineNr">2189 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2190"></a><span id="L2190" class="LineNr">2190 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<a name="L2191"></a><span id="L2191" class="LineNr">2191 </span> <span class="Comment"># editor contains more lines than can fit on screen</span> +<a name="L2192"></a><span id="L2192" class="LineNr">2192 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2193"></a><span id="L2193" class="LineNr">2193 </span><span class="Constant">b</span> +<a name="L2194"></a><span id="L2194" class="LineNr">2194 </span><span class="Constant">c</span> +<a name="L2195"></a><span id="L2195" class="LineNr">2195 </span><span class="Constant">d]</span> +<a name="L2196"></a><span id="L2196" class="LineNr">2196 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2197"></a><span id="L2197" class="LineNr">2197 </span> <span class="Comment"># position cursor at end of screen and try to move right</span> +<a name="L2198"></a><span id="L2198" class="LineNr">2198 </span> assume-console [ +<a name="L2199"></a><span id="L2199" class="LineNr">2199 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> +<a name="L2200"></a><span id="L2200" class="LineNr">2200 </span> press right-arrow +<a name="L2201"></a><span id="L2201" class="LineNr">2201 </span> ] +<a name="L2202"></a><span id="L2202" class="LineNr">2202 </span> run [ +<a name="L2203"></a><span id="L2203" class="LineNr">2203 </span> editor-event-loop screen, console, e +<a name="L2204"></a><span id="L2204" class="LineNr">2204 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2205"></a><span id="L2205" class="LineNr">2205 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2206"></a><span id="L2206" class="LineNr">2206 </span> ] +<a name="L2207"></a><span id="L2207" class="LineNr">2207 </span> <span class="Comment"># screen scrolls</span> +<a name="L2208"></a><span id="L2208" class="LineNr">2208 </span> screen-should-contain [ +<a name="L2209"></a><span id="L2209" class="LineNr">2209 </span> <span class="Constant"> . .</span> +<a name="L2210"></a><span id="L2210" class="LineNr">2210 </span> <span class="Constant"> .b .</span> +<a name="L2211"></a><span id="L2211" class="LineNr">2211 </span> <span class="Constant"> .c .</span> +<a name="L2212"></a><span id="L2212" class="LineNr">2212 </span> <span class="Constant"> .d .</span> +<a name="L2213"></a><span id="L2213" class="LineNr">2213 </span> ] +<a name="L2214"></a><span id="L2214" class="LineNr">2214 </span> memory-should-contain [ +<a name="L2215"></a><span id="L2215" class="LineNr">2215 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L2216"></a><span id="L2216" class="LineNr">2216 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<a name="L2217"></a><span id="L2217" class="LineNr">2217 </span> ] +<a name="L2218"></a><span id="L2218" class="LineNr">2218 </span>] +<a name="L2219"></a><span id="L2219" class="LineNr">2219 </span> +<a name="L2220"></a><span id="L2220" class="LineNr">2220 </span><span class="muScenario">scenario</span> editor-scrolls-at-end-on-down-arrow [ +<a name="L2221"></a><span id="L2221" class="LineNr">2221 </span> <span class="Constant">local-scope</span> +<a name="L2222"></a><span id="L2222" class="LineNr">2222 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L2223"></a><span id="L2223" class="LineNr">2223 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<a name="L2224"></a><span id="L2224" class="LineNr">2224 </span><span class="Constant">de]</span> +<a name="L2225"></a><span id="L2225" class="LineNr">2225 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L2226"></a><span id="L2226" class="LineNr">2226 </span> editor-render screen, e +<a name="L2227"></a><span id="L2227" class="LineNr">2227 </span> $clear-trace +<a name="L2228"></a><span id="L2228" class="LineNr">2228 </span> <span class="Comment"># try to move down past end of text</span> +<a name="L2229"></a><span id="L2229" class="LineNr">2229 </span> assume-console [ +<a name="L2230"></a><span id="L2230" class="LineNr">2230 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<a name="L2231"></a><span id="L2231" class="LineNr">2231 </span> press down-arrow +<a name="L2232"></a><span id="L2232" class="LineNr">2232 </span> ] +<a name="L2233"></a><span id="L2233" class="LineNr">2233 </span> run [ +<a name="L2234"></a><span id="L2234" class="LineNr">2234 </span> editor-event-loop screen, console, e +<a name="L2235"></a><span id="L2235" class="LineNr">2235 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2236"></a><span id="L2236" class="LineNr">2236 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2237"></a><span id="L2237" class="LineNr">2237 </span> ] +<a name="L2238"></a><span id="L2238" class="LineNr">2238 </span> <span class="Comment"># screen should scroll, moving cursor to end of text</span> +<a name="L2239"></a><span id="L2239" class="LineNr">2239 </span> memory-should-contain [ +<a name="L2240"></a><span id="L2240" class="LineNr">2240 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L2241"></a><span id="L2241" class="LineNr">2241 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<a name="L2242"></a><span id="L2242" class="LineNr">2242 </span> ] +<a name="L2243"></a><span id="L2243" class="LineNr">2243 </span> assume-console [ +<a name="L2244"></a><span id="L2244" class="LineNr">2244 </span> type <span class="Constant">[0]</span> +<a name="L2245"></a><span id="L2245" class="LineNr">2245 </span> ] +<a name="L2246"></a><span id="L2246" class="LineNr">2246 </span> run [ +<a name="L2247"></a><span id="L2247" class="LineNr">2247 </span> editor-event-loop screen, console, e +<a name="L2248"></a><span id="L2248" class="LineNr">2248 </span> ] +<a name="L2249"></a><span id="L2249" class="LineNr">2249 </span> screen-should-contain [ +<a name="L2250"></a><span id="L2250" class="LineNr">2250 </span> <span class="Constant"> . .</span> +<a name="L2251"></a><span id="L2251" class="LineNr">2251 </span> <span class="Constant"> .de0 .</span> +<a name="L2252"></a><span id="L2252" class="LineNr">2252 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L2253"></a><span id="L2253" class="LineNr">2253 </span> <span class="Constant"> . .</span> +<a name="L2254"></a><span id="L2254" class="LineNr">2254 </span> ] +<a name="L2255"></a><span id="L2255" class="LineNr">2255 </span> <span class="Comment"># try to move down again</span> +<a name="L2256"></a><span id="L2256" class="LineNr">2256 </span> $clear-trace +<a name="L2257"></a><span id="L2257" class="LineNr">2257 </span> assume-console [ +<a name="L2258"></a><span id="L2258" class="LineNr">2258 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<a name="L2259"></a><span id="L2259" class="LineNr">2259 </span> press down-arrow +<a name="L2260"></a><span id="L2260" class="LineNr">2260 </span> ] +<a name="L2261"></a><span id="L2261" class="LineNr">2261 </span> run [ +<a name="L2262"></a><span id="L2262" class="LineNr">2262 </span> editor-event-loop screen, console, e +<a name="L2263"></a><span id="L2263" class="LineNr">2263 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2264"></a><span id="L2264" class="LineNr">2264 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2265"></a><span id="L2265" class="LineNr">2265 </span> ] +<a name="L2266"></a><span id="L2266" class="LineNr">2266 </span> <span class="Comment"># screen stops scrolling because cursor is already at top</span> +<a name="L2267"></a><span id="L2267" class="LineNr">2267 </span> memory-should-contain [ +<a name="L2268"></a><span id="L2268" class="LineNr">2268 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L2269"></a><span id="L2269" class="LineNr">2269 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<a name="L2270"></a><span id="L2270" class="LineNr">2270 </span> ] +<a name="L2271"></a><span id="L2271" class="LineNr">2271 </span> check-trace-count-for-label<span class="Constant"> 0</span>, <span class="Constant">[print-character]</span> +<a name="L2272"></a><span id="L2272" class="LineNr">2272 </span> assume-console [ +<a name="L2273"></a><span id="L2273" class="LineNr">2273 </span> type <span class="Constant">[1]</span> +<a name="L2274"></a><span id="L2274" class="LineNr">2274 </span> ] +<a name="L2275"></a><span id="L2275" class="LineNr">2275 </span> run [ +<a name="L2276"></a><span id="L2276" class="LineNr">2276 </span> editor-event-loop screen, console, e +<a name="L2277"></a><span id="L2277" class="LineNr">2277 </span> ] +<a name="L2278"></a><span id="L2278" class="LineNr">2278 </span> screen-should-contain [ +<a name="L2279"></a><span id="L2279" class="LineNr">2279 </span> <span class="Constant"> . .</span> +<a name="L2280"></a><span id="L2280" class="LineNr">2280 </span> <span class="Constant"> .de01 .</span> +<a name="L2281"></a><span id="L2281" class="LineNr">2281 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L2282"></a><span id="L2282" class="LineNr">2282 </span> <span class="Constant"> . .</span> +<a name="L2283"></a><span id="L2283" class="LineNr">2283 </span> ] +<a name="L2284"></a><span id="L2284" class="LineNr">2284 </span>] +<a name="L2285"></a><span id="L2285" class="LineNr">2285 </span> +<a name="L2286"></a><span id="L2286" class="LineNr">2286 </span><span class="muScenario">scenario</span> editor-combines-page-and-line-scroll [ +<a name="L2287"></a><span id="L2287" class="LineNr">2287 </span> <span class="Constant">local-scope</span> +<a name="L2288"></a><span id="L2288" class="LineNr">2288 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2289"></a><span id="L2289" class="LineNr">2289 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2290"></a><span id="L2290" class="LineNr">2290 </span> <span class="Comment"># initialize editor with a few pages of lines</span> +<a name="L2291"></a><span id="L2291" class="LineNr">2291 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2292"></a><span id="L2292" class="LineNr">2292 </span><span class="Constant">b</span> +<a name="L2293"></a><span id="L2293" class="LineNr">2293 </span><span class="Constant">c</span> +<a name="L2294"></a><span id="L2294" class="LineNr">2294 </span><span class="Constant">d</span> +<a name="L2295"></a><span id="L2295" class="LineNr">2295 </span><span class="Constant">e</span> +<a name="L2296"></a><span id="L2296" class="LineNr">2296 </span><span class="Constant">f</span> +<a name="L2297"></a><span id="L2297" class="LineNr">2297 </span><span class="Constant">g]</span> +<a name="L2298"></a><span id="L2298" class="LineNr">2298 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2299"></a><span id="L2299" class="LineNr">2299 </span> editor-render screen, e +<a name="L2300"></a><span id="L2300" class="LineNr">2300 </span> <span class="Comment"># scroll down one page and one line</span> +<a name="L2301"></a><span id="L2301" class="LineNr">2301 </span> assume-console [ +<a name="L2302"></a><span id="L2302" class="LineNr">2302 </span> press page-down +<a name="L2303"></a><span id="L2303" class="LineNr">2303 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<a name="L2304"></a><span id="L2304" class="LineNr">2304 </span> press down-arrow +<a name="L2305"></a><span id="L2305" class="LineNr">2305 </span> ] +<a name="L2306"></a><span id="L2306" class="LineNr">2306 </span> run [ +<a name="L2307"></a><span id="L2307" class="LineNr">2307 </span> editor-event-loop screen, console, e +<a name="L2308"></a><span id="L2308" class="LineNr">2308 </span> ] +<a name="L2309"></a><span id="L2309" class="LineNr">2309 </span> <span class="Comment"># screen scrolls down 3 lines</span> +<a name="L2310"></a><span id="L2310" class="LineNr">2310 </span> screen-should-contain [ +<a name="L2311"></a><span id="L2311" class="LineNr">2311 </span> <span class="Constant"> . .</span> +<a name="L2312"></a><span id="L2312" class="LineNr">2312 </span> <span class="Constant"> .d .</span> +<a name="L2313"></a><span id="L2313" class="LineNr">2313 </span> <span class="Constant"> .e .</span> +<a name="L2314"></a><span id="L2314" class="LineNr">2314 </span> <span class="Constant"> .f .</span> +<a name="L2315"></a><span id="L2315" class="LineNr">2315 </span> ] +<a name="L2316"></a><span id="L2316" class="LineNr">2316 </span>] +<a name="L2317"></a><span id="L2317" class="LineNr">2317 </span> +<a name="L2318"></a><span id="L2318" class="LineNr">2318 </span><span class="Comment"># cursor-up can scroll if necessary</span> +<a name="L2319"></a><span id="L2319" class="LineNr">2319 </span> +<a name="L2320"></a><span id="L2320" class="LineNr">2320 </span><span class="muScenario">scenario</span> editor-can-scroll-up-using-arrow-keys [ +<a name="L2321"></a><span id="L2321" class="LineNr">2321 </span> <span class="Constant">local-scope</span> +<a name="L2322"></a><span id="L2322" class="LineNr">2322 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2323"></a><span id="L2323" class="LineNr">2323 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2324"></a><span id="L2324" class="LineNr">2324 </span> <span class="Comment"># initialize editor with >3 lines</span> +<a name="L2325"></a><span id="L2325" class="LineNr">2325 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2326"></a><span id="L2326" class="LineNr">2326 </span><span class="Constant">b</span> +<a name="L2327"></a><span id="L2327" class="LineNr">2327 </span><span class="Constant">c</span> +<a name="L2328"></a><span id="L2328" class="LineNr">2328 </span><span class="Constant">d]</span> +<a name="L2329"></a><span id="L2329" class="LineNr">2329 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L2330"></a><span id="L2330" class="LineNr">2330 </span> editor-render screen, e +<a name="L2331"></a><span id="L2331" class="LineNr">2331 </span> screen-should-contain [ +<a name="L2332"></a><span id="L2332" class="LineNr">2332 </span> <span class="Constant"> . .</span> +<a name="L2333"></a><span id="L2333" class="LineNr">2333 </span> <span class="Constant"> .a .</span> +<a name="L2334"></a><span id="L2334" class="LineNr">2334 </span> <span class="Constant"> .b .</span> +<a name="L2335"></a><span id="L2335" class="LineNr">2335 </span> <span class="Constant"> .c .</span> +<a name="L2336"></a><span id="L2336" class="LineNr">2336 </span> ] +<a name="L2337"></a><span id="L2337" class="LineNr">2337 </span> <span class="Comment"># position cursor at top of second page, then try to move up</span> +<a name="L2338"></a><span id="L2338" class="LineNr">2338 </span> assume-console [ +<a name="L2339"></a><span id="L2339" class="LineNr">2339 </span> press page-down +<a name="L2340"></a><span id="L2340" class="LineNr">2340 </span> press up-arrow +<a name="L2341"></a><span id="L2341" class="LineNr">2341 </span> ] +<a name="L2342"></a><span id="L2342" class="LineNr">2342 </span> run [ +<a name="L2343"></a><span id="L2343" class="LineNr">2343 </span> editor-event-loop screen, console, e +<a name="L2344"></a><span id="L2344" class="LineNr">2344 </span> ] +<a name="L2345"></a><span id="L2345" class="LineNr">2345 </span> <span class="Comment"># screen slides by one line</span> +<a name="L2346"></a><span id="L2346" class="LineNr">2346 </span> screen-should-contain [ +<a name="L2347"></a><span id="L2347" class="LineNr">2347 </span> <span class="Constant"> . .</span> +<a name="L2348"></a><span id="L2348" class="LineNr">2348 </span> <span class="Constant"> .b .</span> +<a name="L2349"></a><span id="L2349" class="LineNr">2349 </span> <span class="Constant"> .c .</span> +<a name="L2350"></a><span id="L2350" class="LineNr">2350 </span> <span class="Constant"> .d .</span> +<a name="L2351"></a><span id="L2351" class="LineNr">2351 </span> ] +<a name="L2352"></a><span id="L2352" class="LineNr">2352 </span>] +<a name="L2353"></a><span id="L2353" class="LineNr">2353 </span> +<a name="L2354"></a><span id="L2354" class="LineNr">2354 </span><span class="muRecipe">after</span> <span class="Constant"><scroll-up></span> [ +<a name="L2355"></a><span id="L2355" class="LineNr">2355 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll up]</span> +<a name="L2356"></a><span id="L2356" class="LineNr">2356 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2357"></a><span id="L2357" class="LineNr">2357 </span> old-top:&:duplex-list:char <span class="Special"><-</span> copy top-of-screen +<a name="L2358"></a><span id="L2358" class="LineNr">2358 </span> top-of-screen <span class="Special"><-</span> before-previous-line top-of-screen, editor +<a name="L2359"></a><span id="L2359" class="LineNr">2359 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen +<a name="L2360"></a><span id="L2360" class="LineNr">2360 </span> no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen +<a name="L2361"></a><span id="L2361" class="LineNr">2361 </span> <span class="muControl">return-if</span> no-movement?, <span class="Constant">0/don't-render</span> +<a name="L2362"></a><span id="L2362" class="LineNr">2362 </span>] +<a name="L2363"></a><span id="L2363" class="LineNr">2363 </span> +<a name="L2364"></a><span id="L2364" class="LineNr">2364 </span><span class="Comment"># takes a pointer into the doubly-linked list, scans back to before start of</span> +<a name="L2365"></a><span id="L2365" class="LineNr">2365 </span><span class="Comment"># previous *wrapped* line</span> +<a name="L2366"></a><span id="L2366" class="LineNr">2366 </span><span class="Comment"># beware: never return null pointer</span> +<a name="L2367"></a><span id="L2367" class="LineNr">2367 </span><span class="muRecipe">def</span> before-previous-line in:&:duplex-list:char, editor:&:editor<span class="muRecipe"> -> </span>out:&:duplex-list:char [ +<a name="L2368"></a><span id="L2368" class="LineNr">2368 </span> <span class="Constant">local-scope</span> +<a name="L2369"></a><span id="L2369" class="LineNr">2369 </span> <span class="Constant">load-ingredients</span> +<a name="L2370"></a><span id="L2370" class="LineNr">2370 </span> curr:&:duplex-list:char <span class="Special"><-</span> copy in +<a name="L2371"></a><span id="L2371" class="LineNr">2371 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<a name="L2372"></a><span id="L2372" class="LineNr">2372 </span> <span class="Comment"># compute max, number of characters to skip</span> +<a name="L2373"></a><span id="L2373" class="LineNr">2373 </span> <span class="Comment"># 1 + len%(width-1)</span> +<a name="L2374"></a><span id="L2374" class="LineNr">2374 </span> <span class="Comment"># except rotate second term to vary from 1 to width-1 rather than 0 to width-2</span> +<a name="L2375"></a><span id="L2375" class="LineNr">2375 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<a name="L2376"></a><span id="L2376" class="LineNr">2376 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<a name="L2377"></a><span id="L2377" class="LineNr">2377 </span> max-line-length:num <span class="Special"><-</span> subtract right, left, <span class="Constant">-1/exclusive-right</span>, <span class="Constant">1/wrap-icon</span> +<a name="L2378"></a><span id="L2378" class="LineNr">2378 </span> sentinel:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<a name="L2379"></a><span id="L2379" class="LineNr">2379 </span> len:num <span class="Special"><-</span> previous-line-length curr, sentinel +<a name="L2380"></a><span id="L2380" class="LineNr">2380 </span> <span class="Delimiter">{</span> +<a name="L2381"></a><span id="L2381" class="LineNr">2381 </span> <span class="muControl">break-if</span> len +<a name="L2382"></a><span id="L2382" class="LineNr">2382 </span> <span class="Comment"># empty line; just skip this newline</span> +<a name="L2383"></a><span id="L2383" class="LineNr">2383 </span> prev:&:duplex-list:char <span class="Special"><-</span> prev curr +<a name="L2384"></a><span id="L2384" class="LineNr">2384 </span> <span class="muControl">return-unless</span> prev, curr +<a name="L2385"></a><span id="L2385" class="LineNr">2385 </span> <span class="muControl">return</span> prev +<a name="L2386"></a><span id="L2386" class="LineNr">2386 </span> <span class="Delimiter">}</span> +<a name="L2387"></a><span id="L2387" class="LineNr">2387 </span> _, max:num <span class="Special"><-</span> divide-with-remainder len, max-line-length +<a name="L2388"></a><span id="L2388" class="LineNr">2388 </span> <span class="Comment"># remainder 0 => scan one width-worth</span> +<a name="L2389"></a><span id="L2389" class="LineNr">2389 </span> <span class="Delimiter">{</span> +<a name="L2390"></a><span id="L2390" class="LineNr">2390 </span> <span class="muControl">break-if</span> max +<a name="L2391"></a><span id="L2391" class="LineNr">2391 </span> max <span class="Special"><-</span> copy max-line-length +<a name="L2392"></a><span id="L2392" class="LineNr">2392 </span> <span class="Delimiter">}</span> +<a name="L2393"></a><span id="L2393" class="LineNr">2393 </span> max <span class="Special"><-</span> add max,<span class="Constant"> 1</span> +<a name="L2394"></a><span id="L2394" class="LineNr">2394 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<a name="L2395"></a><span id="L2395" class="LineNr">2395 </span> <span class="Comment"># skip 'max' characters</span> +<a name="L2396"></a><span id="L2396" class="LineNr">2396 </span> <span class="Delimiter">{</span> +<a name="L2397"></a><span id="L2397" class="LineNr">2397 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max +<a name="L2398"></a><span id="L2398" class="LineNr">2398 </span> <span class="muControl">break-if</span> done? +<a name="L2399"></a><span id="L2399" class="LineNr">2399 </span> prev:&:duplex-list:char <span class="Special"><-</span> prev curr +<a name="L2400"></a><span id="L2400" class="LineNr">2400 </span> <span class="muControl">break-unless</span> prev +<a name="L2401"></a><span id="L2401" class="LineNr">2401 </span> curr <span class="Special"><-</span> copy prev +<a name="L2402"></a><span id="L2402" class="LineNr">2402 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<a name="L2403"></a><span id="L2403" class="LineNr">2403 </span> <span class="muControl">loop</span> +<a name="L2404"></a><span id="L2404" class="LineNr">2404 </span> <span class="Delimiter">}</span> +<a name="L2405"></a><span id="L2405" class="LineNr">2405 </span> <span class="muControl">return</span> curr +<a name="L2406"></a><span id="L2406" class="LineNr">2406 </span>] +<a name="L2407"></a><span id="L2407" class="LineNr">2407 </span> +<a name="L2408"></a><span id="L2408" class="LineNr">2408 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys [ +<a name="L2409"></a><span id="L2409" class="LineNr">2409 </span> <span class="Constant">local-scope</span> +<a name="L2410"></a><span id="L2410" class="LineNr">2410 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2411"></a><span id="L2411" class="LineNr">2411 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2412"></a><span id="L2412" class="LineNr">2412 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> +<a name="L2413"></a><span id="L2413" class="LineNr">2413 </span> <span class="Comment"># other lines</span> +<a name="L2414"></a><span id="L2414" class="LineNr">2414 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<a name="L2415"></a><span id="L2415" class="LineNr">2415 </span><span class="Constant">g</span> +<a name="L2416"></a><span id="L2416" class="LineNr">2416 </span><span class="Constant">h</span> +<a name="L2417"></a><span id="L2417" class="LineNr">2417 </span><span class="Constant">i]</span> +<a name="L2418"></a><span id="L2418" class="LineNr">2418 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2419"></a><span id="L2419" class="LineNr">2419 </span> editor-render screen, e +<a name="L2420"></a><span id="L2420" class="LineNr">2420 </span> screen-should-contain [ +<a name="L2421"></a><span id="L2421" class="LineNr">2421 </span> <span class="Constant"> . .</span> +<a name="L2422"></a><span id="L2422" class="LineNr">2422 </span> <span class="Constant"> .abcd↩ .</span> +<a name="L2423"></a><span id="L2423" class="LineNr">2423 </span> <span class="Constant"> .ef .</span> +<a name="L2424"></a><span id="L2424" class="LineNr">2424 </span> <span class="Constant"> .g .</span> +<a name="L2425"></a><span id="L2425" class="LineNr">2425 </span> ] +<a name="L2426"></a><span id="L2426" class="LineNr">2426 </span> <span class="Comment"># position cursor at top of second page, just below wrapped line</span> +<a name="L2427"></a><span id="L2427" class="LineNr">2427 </span> assume-console [ +<a name="L2428"></a><span id="L2428" class="LineNr">2428 </span> press page-down +<a name="L2429"></a><span id="L2429" class="LineNr">2429 </span> ] +<a name="L2430"></a><span id="L2430" class="LineNr">2430 </span> run [ +<a name="L2431"></a><span id="L2431" class="LineNr">2431 </span> editor-event-loop screen, console, e +<a name="L2432"></a><span id="L2432" class="LineNr">2432 </span> ] +<a name="L2433"></a><span id="L2433" class="LineNr">2433 </span> screen-should-contain [ +<a name="L2434"></a><span id="L2434" class="LineNr">2434 </span> <span class="Constant"> . .</span> +<a name="L2435"></a><span id="L2435" class="LineNr">2435 </span> <span class="Constant"> .g .</span> +<a name="L2436"></a><span id="L2436" class="LineNr">2436 </span> <span class="Constant"> .h .</span> +<a name="L2437"></a><span id="L2437" class="LineNr">2437 </span> <span class="Constant"> .i .</span> +<a name="L2438"></a><span id="L2438" class="LineNr">2438 </span> ] +<a name="L2439"></a><span id="L2439" class="LineNr">2439 </span> <span class="Comment"># now move up one line</span> +<a name="L2440"></a><span id="L2440" class="LineNr">2440 </span> assume-console [ +<a name="L2441"></a><span id="L2441" class="LineNr">2441 </span> press up-arrow +<a name="L2442"></a><span id="L2442" class="LineNr">2442 </span> ] +<a name="L2443"></a><span id="L2443" class="LineNr">2443 </span> run [ +<a name="L2444"></a><span id="L2444" class="LineNr">2444 </span> editor-event-loop screen, console, e +<a name="L2445"></a><span id="L2445" class="LineNr">2445 </span> ] +<a name="L2446"></a><span id="L2446" class="LineNr">2446 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2447"></a><span id="L2447" class="LineNr">2447 </span> screen-should-contain [ +<a name="L2448"></a><span id="L2448" class="LineNr">2448 </span> <span class="Constant"> . .</span> +<a name="L2449"></a><span id="L2449" class="LineNr">2449 </span> <span class="Constant"> .ef .</span> +<a name="L2450"></a><span id="L2450" class="LineNr">2450 </span> <span class="Constant"> .g .</span> +<a name="L2451"></a><span id="L2451" class="LineNr">2451 </span> <span class="Constant"> .h .</span> +<a name="L2452"></a><span id="L2452" class="LineNr">2452 </span> ] +<a name="L2453"></a><span id="L2453" class="LineNr">2453 </span>] +<a name="L2454"></a><span id="L2454" class="LineNr">2454 </span> +<a name="L2455"></a><span id="L2455" class="LineNr">2455 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-2 [ +<a name="L2456"></a><span id="L2456" class="LineNr">2456 </span> <span class="Constant">local-scope</span> +<a name="L2457"></a><span id="L2457" class="LineNr">2457 </span> <span class="Comment"># screen has 1 line for menu + 4 lines</span> +<a name="L2458"></a><span id="L2458" class="LineNr">2458 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<a name="L2459"></a><span id="L2459" class="LineNr">2459 </span> <span class="Comment"># editor starts with a long line wrapping twice, occupying 3 of the 4 lines</span> +<a name="L2460"></a><span id="L2460" class="LineNr">2460 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> +<a name="L2461"></a><span id="L2461" class="LineNr">2461 </span><span class="Constant">k</span> +<a name="L2462"></a><span id="L2462" class="LineNr">2462 </span><span class="Constant">l</span> +<a name="L2463"></a><span id="L2463" class="LineNr">2463 </span><span class="Constant">m]</span> +<a name="L2464"></a><span id="L2464" class="LineNr">2464 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2465"></a><span id="L2465" class="LineNr">2465 </span> editor-render screen, e +<a name="L2466"></a><span id="L2466" class="LineNr">2466 </span> <span class="Comment"># position cursor at top of second page</span> +<a name="L2467"></a><span id="L2467" class="LineNr">2467 </span> assume-console [ +<a name="L2468"></a><span id="L2468" class="LineNr">2468 </span> press page-down +<a name="L2469"></a><span id="L2469" class="LineNr">2469 </span> ] +<a name="L2470"></a><span id="L2470" class="LineNr">2470 </span> run [ +<a name="L2471"></a><span id="L2471" class="LineNr">2471 </span> editor-event-loop screen, console, e +<a name="L2472"></a><span id="L2472" class="LineNr">2472 </span> ] +<a name="L2473"></a><span id="L2473" class="LineNr">2473 </span> screen-should-contain [ +<a name="L2474"></a><span id="L2474" class="LineNr">2474 </span> <span class="Constant"> . .</span> +<a name="L2475"></a><span id="L2475" class="LineNr">2475 </span> <span class="Constant"> .k .</span> +<a name="L2476"></a><span id="L2476" class="LineNr">2476 </span> <span class="Constant"> .l .</span> +<a name="L2477"></a><span id="L2477" class="LineNr">2477 </span> <span class="Constant"> .m .</span> +<a name="L2478"></a><span id="L2478" class="LineNr">2478 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<a name="L2479"></a><span id="L2479" class="LineNr">2479 </span> ] +<a name="L2480"></a><span id="L2480" class="LineNr">2480 </span> <span class="Comment"># move up one line</span> +<a name="L2481"></a><span id="L2481" class="LineNr">2481 </span> assume-console [ +<a name="L2482"></a><span id="L2482" class="LineNr">2482 </span> press up-arrow +<a name="L2483"></a><span id="L2483" class="LineNr">2483 </span> ] +<a name="L2484"></a><span id="L2484" class="LineNr">2484 </span> run [ +<a name="L2485"></a><span id="L2485" class="LineNr">2485 </span> editor-event-loop screen, console, e +<a name="L2486"></a><span id="L2486" class="LineNr">2486 </span> ] +<a name="L2487"></a><span id="L2487" class="LineNr">2487 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2488"></a><span id="L2488" class="LineNr">2488 </span> screen-should-contain [ +<a name="L2489"></a><span id="L2489" class="LineNr">2489 </span> <span class="Constant"> . .</span> +<a name="L2490"></a><span id="L2490" class="LineNr">2490 </span> <span class="Constant"> .ij .</span> +<a name="L2491"></a><span id="L2491" class="LineNr">2491 </span> <span class="Constant"> .k .</span> +<a name="L2492"></a><span id="L2492" class="LineNr">2492 </span> <span class="Constant"> .l .</span> +<a name="L2493"></a><span id="L2493" class="LineNr">2493 </span> <span class="Constant"> .m .</span> +<a name="L2494"></a><span id="L2494" class="LineNr">2494 </span> ] +<a name="L2495"></a><span id="L2495" class="LineNr">2495 </span> <span class="Comment"># move up a second line</span> +<a name="L2496"></a><span id="L2496" class="LineNr">2496 </span> assume-console [ +<a name="L2497"></a><span id="L2497" class="LineNr">2497 </span> press up-arrow +<a name="L2498"></a><span id="L2498" class="LineNr">2498 </span> ] +<a name="L2499"></a><span id="L2499" class="LineNr">2499 </span> run [ +<a name="L2500"></a><span id="L2500" class="LineNr">2500 </span> editor-event-loop screen, console, e +<a name="L2501"></a><span id="L2501" class="LineNr">2501 </span> ] +<a name="L2502"></a><span id="L2502" class="LineNr">2502 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2503"></a><span id="L2503" class="LineNr">2503 </span> screen-should-contain [ +<a name="L2504"></a><span id="L2504" class="LineNr">2504 </span> <span class="Constant"> . .</span> +<a name="L2505"></a><span id="L2505" class="LineNr">2505 </span> <span class="Constant"> .efgh↩ .</span> +<a name="L2506"></a><span id="L2506" class="LineNr">2506 </span> <span class="Constant"> .ij .</span> +<a name="L2507"></a><span id="L2507" class="LineNr">2507 </span> <span class="Constant"> .k .</span> +<a name="L2508"></a><span id="L2508" class="LineNr">2508 </span> <span class="Constant"> .l .</span> +<a name="L2509"></a><span id="L2509" class="LineNr">2509 </span> ] +<a name="L2510"></a><span id="L2510" class="LineNr">2510 </span> <span class="Comment"># move up a third line</span> +<a name="L2511"></a><span id="L2511" class="LineNr">2511 </span> assume-console [ +<a name="L2512"></a><span id="L2512" class="LineNr">2512 </span> press up-arrow +<a name="L2513"></a><span id="L2513" class="LineNr">2513 </span> ] +<a name="L2514"></a><span id="L2514" class="LineNr">2514 </span> run [ +<a name="L2515"></a><span id="L2515" class="LineNr">2515 </span> editor-event-loop screen, console, e +<a name="L2516"></a><span id="L2516" class="LineNr">2516 </span> ] +<a name="L2517"></a><span id="L2517" class="LineNr">2517 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2518"></a><span id="L2518" class="LineNr">2518 </span> screen-should-contain [ +<a name="L2519"></a><span id="L2519" class="LineNr">2519 </span> <span class="Constant"> . .</span> +<a name="L2520"></a><span id="L2520" class="LineNr">2520 </span> <span class="Constant"> .abcd↩ .</span> +<a name="L2521"></a><span id="L2521" class="LineNr">2521 </span> <span class="Constant"> .efgh↩ .</span> +<a name="L2522"></a><span id="L2522" class="LineNr">2522 </span> <span class="Constant"> .ij .</span> +<a name="L2523"></a><span id="L2523" class="LineNr">2523 </span> <span class="Constant"> .k .</span> +<a name="L2524"></a><span id="L2524" class="LineNr">2524 </span> ] +<a name="L2525"></a><span id="L2525" class="LineNr">2525 </span>] +<a name="L2526"></a><span id="L2526" class="LineNr">2526 </span> +<a name="L2527"></a><span id="L2527" class="LineNr">2527 </span><span class="Comment"># same as editor-scrolls-up-past-wrapped-line-using-arrow-keys but length</span> +<a name="L2528"></a><span id="L2528" class="LineNr">2528 </span><span class="Comment"># slightly off, just to prevent over-training</span> +<a name="L2529"></a><span id="L2529" class="LineNr">2529 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-3 [ +<a name="L2530"></a><span id="L2530" class="LineNr">2530 </span> <span class="Constant">local-scope</span> +<a name="L2531"></a><span id="L2531" class="LineNr">2531 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2532"></a><span id="L2532" class="LineNr">2532 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2533"></a><span id="L2533" class="LineNr">2533 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> +<a name="L2534"></a><span id="L2534" class="LineNr">2534 </span> <span class="Comment"># other lines</span> +<a name="L2535"></a><span id="L2535" class="LineNr">2535 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<a name="L2536"></a><span id="L2536" class="LineNr">2536 </span><span class="Constant">g</span> +<a name="L2537"></a><span id="L2537" class="LineNr">2537 </span><span class="Constant">h</span> +<a name="L2538"></a><span id="L2538" class="LineNr">2538 </span><span class="Constant">i]</span> +<a name="L2539"></a><span id="L2539" class="LineNr">2539 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> +<a name="L2540"></a><span id="L2540" class="LineNr">2540 </span> editor-render screen, e +<a name="L2541"></a><span id="L2541" class="LineNr">2541 </span> screen-should-contain [ +<a name="L2542"></a><span id="L2542" class="LineNr">2542 </span> <span class="Constant"> . .</span> +<a name="L2543"></a><span id="L2543" class="LineNr">2543 </span> <span class="Constant"> .abcde↩ .</span> +<a name="L2544"></a><span id="L2544" class="LineNr">2544 </span> <span class="Constant"> .f .</span> +<a name="L2545"></a><span id="L2545" class="LineNr">2545 </span> <span class="Constant"> .g .</span> +<a name="L2546"></a><span id="L2546" class="LineNr">2546 </span> ] +<a name="L2547"></a><span id="L2547" class="LineNr">2547 </span> <span class="Comment"># position cursor at top of second page, just below wrapped line</span> +<a name="L2548"></a><span id="L2548" class="LineNr">2548 </span> assume-console [ +<a name="L2549"></a><span id="L2549" class="LineNr">2549 </span> press page-down +<a name="L2550"></a><span id="L2550" class="LineNr">2550 </span> ] +<a name="L2551"></a><span id="L2551" class="LineNr">2551 </span> run [ +<a name="L2552"></a><span id="L2552" class="LineNr">2552 </span> editor-event-loop screen, console, e +<a name="L2553"></a><span id="L2553" class="LineNr">2553 </span> ] +<a name="L2554"></a><span id="L2554" class="LineNr">2554 </span> screen-should-contain [ +<a name="L2555"></a><span id="L2555" class="LineNr">2555 </span> <span class="Constant"> . .</span> +<a name="L2556"></a><span id="L2556" class="LineNr">2556 </span> <span class="Constant"> .g .</span> +<a name="L2557"></a><span id="L2557" class="LineNr">2557 </span> <span class="Constant"> .h .</span> +<a name="L2558"></a><span id="L2558" class="LineNr">2558 </span> <span class="Constant"> .i .</span> +<a name="L2559"></a><span id="L2559" class="LineNr">2559 </span> ] +<a name="L2560"></a><span id="L2560" class="LineNr">2560 </span> <span class="Comment"># now move up one line</span> +<a name="L2561"></a><span id="L2561" class="LineNr">2561 </span> assume-console [ +<a name="L2562"></a><span id="L2562" class="LineNr">2562 </span> press up-arrow +<a name="L2563"></a><span id="L2563" class="LineNr">2563 </span> ] +<a name="L2564"></a><span id="L2564" class="LineNr">2564 </span> run [ +<a name="L2565"></a><span id="L2565" class="LineNr">2565 </span> editor-event-loop screen, console, e +<a name="L2566"></a><span id="L2566" class="LineNr">2566 </span> ] +<a name="L2567"></a><span id="L2567" class="LineNr">2567 </span> <span class="Comment"># screen shows partial wrapped line</span> +<a name="L2568"></a><span id="L2568" class="LineNr">2568 </span> screen-should-contain [ +<a name="L2569"></a><span id="L2569" class="LineNr">2569 </span> <span class="Constant"> . .</span> +<a name="L2570"></a><span id="L2570" class="LineNr">2570 </span> <span class="Constant"> .f .</span> +<a name="L2571"></a><span id="L2571" class="LineNr">2571 </span> <span class="Constant"> .g .</span> +<a name="L2572"></a><span id="L2572" class="LineNr">2572 </span> <span class="Constant"> .h .</span> +<a name="L2573"></a><span id="L2573" class="LineNr">2573 </span> ] +<a name="L2574"></a><span id="L2574" class="LineNr">2574 </span>] +<a name="L2575"></a><span id="L2575" class="LineNr">2575 </span> +<a name="L2576"></a><span id="L2576" class="LineNr">2576 </span><span class="Comment"># check empty lines</span> +<a name="L2577"></a><span id="L2577" class="LineNr">2577 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-4 [ +<a name="L2578"></a><span id="L2578" class="LineNr">2578 </span> <span class="Constant">local-scope</span> +<a name="L2579"></a><span id="L2579" class="LineNr">2579 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2580"></a><span id="L2580" class="LineNr">2580 </span> <span class="Comment"># initialize editor with some lines around an empty line</span> +<a name="L2581"></a><span id="L2581" class="LineNr">2581 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2582"></a><span id="L2582" class="LineNr">2582 </span><span class="Constant">b</span> +<a name="L2583"></a><span id="L2583" class="LineNr">2583 </span> +<a name="L2584"></a><span id="L2584" class="LineNr">2584 </span>c +<a name="L2585"></a><span id="L2585" class="LineNr">2585 </span>d +<a name="L2586"></a><span id="L2586" class="LineNr">2586 </span>e] +<a name="L2587"></a><span id="L2587" class="LineNr">2587 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> +<a name="L2588"></a><span id="L2588" class="LineNr">2588 </span> editor-render screen, e +<a name="L2589"></a><span id="L2589" class="LineNr">2589 </span> assume-console [ +<a name="L2590"></a><span id="L2590" class="LineNr">2590 </span> press page-down +<a name="L2591"></a><span id="L2591" class="LineNr">2591 </span> ] +<a name="L2592"></a><span id="L2592" class="LineNr">2592 </span> run [ +<a name="L2593"></a><span id="L2593" class="LineNr">2593 </span> editor-event-loop screen, console, e +<a name="L2594"></a><span id="L2594" class="LineNr">2594 </span> ] +<a name="L2595"></a><span id="L2595" class="LineNr">2595 </span> screen-should-contain [ +<a name="L2596"></a><span id="L2596" class="LineNr">2596 </span> <span class="Constant"> . .</span> +<a name="L2597"></a><span id="L2597" class="LineNr">2597 </span> <span class="Constant"> . .</span> +<a name="L2598"></a><span id="L2598" class="LineNr">2598 </span> <span class="Constant"> .c .</span> +<a name="L2599"></a><span id="L2599" class="LineNr">2599 </span> <span class="Constant"> .d .</span> +<a name="L2600"></a><span id="L2600" class="LineNr">2600 </span> ] +<a name="L2601"></a><span id="L2601" class="LineNr">2601 </span> assume-console [ +<a name="L2602"></a><span id="L2602" class="LineNr">2602 </span> press page-down +<a name="L2603"></a><span id="L2603" class="LineNr">2603 </span> ] +<a name="L2604"></a><span id="L2604" class="LineNr">2604 </span> run [ +<a name="L2605"></a><span id="L2605" class="LineNr">2605 </span> editor-event-loop screen, console, e +<a name="L2606"></a><span id="L2606" class="LineNr">2606 </span> ] +<a name="L2607"></a><span id="L2607" class="LineNr">2607 </span> screen-should-contain [ +<a name="L2608"></a><span id="L2608" class="LineNr">2608 </span> <span class="Constant"> . .</span> +<a name="L2609"></a><span id="L2609" class="LineNr">2609 </span> <span class="Constant"> .d .</span> +<a name="L2610"></a><span id="L2610" class="LineNr">2610 </span> <span class="Constant"> .e .</span> +<a name="L2611"></a><span id="L2611" class="LineNr">2611 </span> <span class="Constant"> .╌╌╌╌╌╌ .</span> +<a name="L2612"></a><span id="L2612" class="LineNr">2612 </span> ] +<a name="L2613"></a><span id="L2613" class="LineNr">2613 </span> assume-console [ +<a name="L2614"></a><span id="L2614" class="LineNr">2614 </span> press page-up +<a name="L2615"></a><span id="L2615" class="LineNr">2615 </span> ] +<a name="L2616"></a><span id="L2616" class="LineNr">2616 </span> run [ +<a name="L2617"></a><span id="L2617" class="LineNr">2617 </span> editor-event-loop screen, console, e +<a name="L2618"></a><span id="L2618" class="LineNr">2618 </span> ] +<a name="L2619"></a><span id="L2619" class="LineNr">2619 </span> screen-should-contain [ +<a name="L2620"></a><span id="L2620" class="LineNr">2620 </span> <span class="Constant"> . .</span> +<a name="L2621"></a><span id="L2621" class="LineNr">2621 </span> <span class="Constant"> . .</span> +<a name="L2622"></a><span id="L2622" class="LineNr">2622 </span> <span class="Constant"> .c .</span> +<a name="L2623"></a><span id="L2623" class="LineNr">2623 </span> <span class="Constant"> .d .</span> +<a name="L2624"></a><span id="L2624" class="LineNr">2624 </span> ] +<a name="L2625"></a><span id="L2625" class="LineNr">2625 </span>] +<a name="L2626"></a><span id="L2626" class="LineNr">2626 </span> +<a name="L2627"></a><span id="L2627" class="LineNr">2627 </span><span class="muScenario">scenario</span> editor-scrolls-up-on-left-arrow [ +<a name="L2628"></a><span id="L2628" class="LineNr">2628 </span> <span class="Constant">local-scope</span> +<a name="L2629"></a><span id="L2629" class="LineNr">2629 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2630"></a><span id="L2630" class="LineNr">2630 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<a name="L2631"></a><span id="L2631" class="LineNr">2631 </span> <span class="Comment"># editor contains >3 lines</span> +<a name="L2632"></a><span id="L2632" class="LineNr">2632 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2633"></a><span id="L2633" class="LineNr">2633 </span><span class="Constant">b</span> +<a name="L2634"></a><span id="L2634" class="LineNr">2634 </span><span class="Constant">c</span> +<a name="L2635"></a><span id="L2635" class="LineNr">2635 </span><span class="Constant">d</span> +<a name="L2636"></a><span id="L2636" class="LineNr">2636 </span><span class="Constant">e]</span> +<a name="L2637"></a><span id="L2637" class="LineNr">2637 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<a name="L2638"></a><span id="L2638" class="LineNr">2638 </span> editor-render screen, e +<a name="L2639"></a><span id="L2639" class="LineNr">2639 </span> <span class="Comment"># position cursor at top of second page</span> +<a name="L2640"></a><span id="L2640" class="LineNr">2640 </span> assume-console [ +<a name="L2641"></a><span id="L2641" class="LineNr">2641 </span> press page-down +<a name="L2642"></a><span id="L2642" class="LineNr">2642 </span> ] +<a name="L2643"></a><span id="L2643" class="LineNr">2643 </span> run [ +<a name="L2644"></a><span id="L2644" class="LineNr">2644 </span> editor-event-loop screen, console, e +<a name="L2645"></a><span id="L2645" class="LineNr">2645 </span> ] +<a name="L2646"></a><span id="L2646" class="LineNr">2646 </span> screen-should-contain [ +<a name="L2647"></a><span id="L2647" class="LineNr">2647 </span> <span class="Constant"> . .</span> +<a name="L2648"></a><span id="L2648" class="LineNr">2648 </span> <span class="Constant"> .c .</span> +<a name="L2649"></a><span id="L2649" class="LineNr">2649 </span> <span class="Constant"> .d .</span> +<a name="L2650"></a><span id="L2650" class="LineNr">2650 </span> <span class="Constant"> .e .</span> +<a name="L2651"></a><span id="L2651" class="LineNr">2651 </span> ] +<a name="L2652"></a><span id="L2652" class="LineNr">2652 </span> <span class="Comment"># now try to move left</span> +<a name="L2653"></a><span id="L2653" class="LineNr">2653 </span> assume-console [ +<a name="L2654"></a><span id="L2654" class="LineNr">2654 </span> press left-arrow +<a name="L2655"></a><span id="L2655" class="LineNr">2655 </span> ] +<a name="L2656"></a><span id="L2656" class="LineNr">2656 </span> run [ +<a name="L2657"></a><span id="L2657" class="LineNr">2657 </span> editor-event-loop screen, console, e +<a name="L2658"></a><span id="L2658" class="LineNr">2658 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<a name="L2659"></a><span id="L2659" class="LineNr">2659 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<a name="L2660"></a><span id="L2660" class="LineNr">2660 </span> ] +<a name="L2661"></a><span id="L2661" class="LineNr">2661 </span> <span class="Comment"># screen scrolls</span> +<a name="L2662"></a><span id="L2662" class="LineNr">2662 </span> screen-should-contain [ +<a name="L2663"></a><span id="L2663" class="LineNr">2663 </span> <span class="Constant"> . .</span> +<a name="L2664"></a><span id="L2664" class="LineNr">2664 </span> <span class="Constant"> .b .</span> +<a name="L2665"></a><span id="L2665" class="LineNr">2665 </span> <span class="Constant"> .c .</span> +<a name="L2666"></a><span id="L2666" class="LineNr">2666 </span> <span class="Constant"> .d .</span> +<a name="L2667"></a><span id="L2667" class="LineNr">2667 </span> ] +<a name="L2668"></a><span id="L2668" class="LineNr">2668 </span> memory-should-contain [ +<a name="L2669"></a><span id="L2669" class="LineNr">2669 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L2670"></a><span id="L2670" class="LineNr">2670 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<a name="L2671"></a><span id="L2671" class="LineNr">2671 </span> ] +<a name="L2672"></a><span id="L2672" class="LineNr">2672 </span>] +<a name="L2673"></a><span id="L2673" class="LineNr">2673 </span> +<a name="L2674"></a><span id="L2674" class="LineNr">2674 </span><span class="muScenario">scenario</span> editor-can-scroll-up-to-start-of-file [ +<a name="L2675"></a><span id="L2675" class="LineNr">2675 </span> <span class="Constant">local-scope</span> +<a name="L2676"></a><span id="L2676" class="LineNr">2676 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L2677"></a><span id="L2677" class="LineNr">2677 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2678"></a><span id="L2678" class="LineNr">2678 </span> <span class="Comment"># initialize editor with >3 lines</span> +<a name="L2679"></a><span id="L2679" class="LineNr">2679 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2680"></a><span id="L2680" class="LineNr">2680 </span><span class="Constant">b</span> +<a name="L2681"></a><span id="L2681" class="LineNr">2681 </span><span class="Constant">c</span> +<a name="L2682"></a><span id="L2682" class="LineNr">2682 </span><span class="Constant">d]</span> +<a name="L2683"></a><span id="L2683" class="LineNr">2683 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L2684"></a><span id="L2684" class="LineNr">2684 </span> editor-render screen, e +<a name="L2685"></a><span id="L2685" class="LineNr">2685 </span> screen-should-contain [ +<a name="L2686"></a><span id="L2686" class="LineNr">2686 </span> <span class="Constant"> . .</span> +<a name="L2687"></a><span id="L2687" class="LineNr">2687 </span> <span class="Constant"> .a .</span> +<a name="L2688"></a><span id="L2688" class="LineNr">2688 </span> <span class="Constant"> .b .</span> +<a name="L2689"></a><span id="L2689" class="LineNr">2689 </span> <span class="Constant"> .c .</span> +<a name="L2690"></a><span id="L2690" class="LineNr">2690 </span> ] +<a name="L2691"></a><span id="L2691" class="LineNr">2691 </span> <span class="Comment"># position cursor at top of second page, then try to move up to start of</span> +<a name="L2692"></a><span id="L2692" class="LineNr">2692 </span> <span class="Comment"># text</span> +<a name="L2693"></a><span id="L2693" class="LineNr">2693 </span> assume-console [ +<a name="L2694"></a><span id="L2694" class="LineNr">2694 </span> press page-down +<a name="L2695"></a><span id="L2695" class="LineNr">2695 </span> press up-arrow +<a name="L2696"></a><span id="L2696" class="LineNr">2696 </span> press up-arrow +<a name="L2697"></a><span id="L2697" class="LineNr">2697 </span> ] +<a name="L2698"></a><span id="L2698" class="LineNr">2698 </span> run [ +<a name="L2699"></a><span id="L2699" class="LineNr">2699 </span> editor-event-loop screen, console, e +<a name="L2700"></a><span id="L2700" class="LineNr">2700 </span> ] +<a name="L2701"></a><span id="L2701" class="LineNr">2701 </span> <span class="Comment"># screen slides by one line</span> +<a name="L2702"></a><span id="L2702" class="LineNr">2702 </span> screen-should-contain [ +<a name="L2703"></a><span id="L2703" class="LineNr">2703 </span> <span class="Constant"> . .</span> +<a name="L2704"></a><span id="L2704" class="LineNr">2704 </span> <span class="Constant"> .a .</span> +<a name="L2705"></a><span id="L2705" class="LineNr">2705 </span> <span class="Constant"> .b .</span> +<a name="L2706"></a><span id="L2706" class="LineNr">2706 </span> <span class="Constant"> .c .</span> +<a name="L2707"></a><span id="L2707" class="LineNr">2707 </span> ] +<a name="L2708"></a><span id="L2708" class="LineNr">2708 </span> <span class="Comment"># try to move up again</span> +<a name="L2709"></a><span id="L2709" class="LineNr">2709 </span> assume-console [ +<a name="L2710"></a><span id="L2710" class="LineNr">2710 </span> press up-arrow +<a name="L2711"></a><span id="L2711" class="LineNr">2711 </span> ] +<a name="L2712"></a><span id="L2712" class="LineNr">2712 </span> run [ +<a name="L2713"></a><span id="L2713" class="LineNr">2713 </span> editor-event-loop screen, console, e +<a name="L2714"></a><span id="L2714" class="LineNr">2714 </span> ] +<a name="L2715"></a><span id="L2715" class="LineNr">2715 </span> <span class="Comment"># screen remains unchanged</span> +<a name="L2716"></a><span id="L2716" class="LineNr">2716 </span> screen-should-contain [ +<a name="L2717"></a><span id="L2717" class="LineNr">2717 </span> <span class="Constant"> . .</span> +<a name="L2718"></a><span id="L2718" class="LineNr">2718 </span> <span class="Constant"> .a .</span> +<a name="L2719"></a><span id="L2719" class="LineNr">2719 </span> <span class="Constant"> .b .</span> +<a name="L2720"></a><span id="L2720" class="LineNr">2720 </span> <span class="Constant"> .c .</span> +<a name="L2721"></a><span id="L2721" class="LineNr">2721 </span> ] +<a name="L2722"></a><span id="L2722" class="LineNr">2722 </span>] +<a name="L2723"></a><span id="L2723" class="LineNr">2723 </span> +<a name="L2724"></a><span id="L2724" class="LineNr">2724 </span><span class="Comment"># ctrl-f/page-down - render next page if it exists</span> +<a name="L2725"></a><span id="L2725" class="LineNr">2725 </span> +<a name="L2726"></a><span id="L2726" class="LineNr">2726 </span><span class="muScenario">scenario</span> editor-can-scroll [ +<a name="L2727"></a><span id="L2727" class="LineNr">2727 </span> <span class="Constant">local-scope</span> +<a name="L2728"></a><span id="L2728" class="LineNr">2728 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2729"></a><span id="L2729" class="LineNr">2729 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2730"></a><span id="L2730" class="LineNr">2730 </span><span class="Constant">b</span> +<a name="L2731"></a><span id="L2731" class="LineNr">2731 </span><span class="Constant">c</span> +<a name="L2732"></a><span id="L2732" class="LineNr">2732 </span><span class="Constant">d]</span> +<a name="L2733"></a><span id="L2733" class="LineNr">2733 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L2734"></a><span id="L2734" class="LineNr">2734 </span> editor-render screen, e +<a name="L2735"></a><span id="L2735" class="LineNr">2735 </span> screen-should-contain [ +<a name="L2736"></a><span id="L2736" class="LineNr">2736 </span> <span class="Constant"> . .</span> +<a name="L2737"></a><span id="L2737" class="LineNr">2737 </span> <span class="Constant"> .a .</span> +<a name="L2738"></a><span id="L2738" class="LineNr">2738 </span> <span class="Constant"> .b .</span> +<a name="L2739"></a><span id="L2739" class="LineNr">2739 </span> <span class="Constant"> .c .</span> +<a name="L2740"></a><span id="L2740" class="LineNr">2740 </span> ] +<a name="L2741"></a><span id="L2741" class="LineNr">2741 </span> <span class="Comment"># scroll down</span> +<a name="L2742"></a><span id="L2742" class="LineNr">2742 </span> assume-console [ +<a name="L2743"></a><span id="L2743" class="LineNr">2743 </span> press page-down +<a name="L2744"></a><span id="L2744" class="LineNr">2744 </span> ] +<a name="L2745"></a><span id="L2745" class="LineNr">2745 </span> run [ +<a name="L2746"></a><span id="L2746" class="LineNr">2746 </span> editor-event-loop screen, console, e +<a name="L2747"></a><span id="L2747" class="LineNr">2747 </span> ] +<a name="L2748"></a><span id="L2748" class="LineNr">2748 </span> <span class="Comment"># screen shows next page</span> +<a name="L2749"></a><span id="L2749" class="LineNr">2749 </span> screen-should-contain [ +<a name="L2750"></a><span id="L2750" class="LineNr">2750 </span> <span class="Constant"> . .</span> +<a name="L2751"></a><span id="L2751" class="LineNr">2751 </span> <span class="Constant"> .c .</span> +<a name="L2752"></a><span id="L2752" class="LineNr">2752 </span> <span class="Constant"> .d .</span> +<a name="L2753"></a><span id="L2753" class="LineNr">2753 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L2754"></a><span id="L2754" class="LineNr">2754 </span> ] +<a name="L2755"></a><span id="L2755" class="LineNr">2755 </span>] +<a name="L2756"></a><span id="L2756" class="LineNr">2756 </span> +<a name="L2757"></a><span id="L2757" class="LineNr">2757 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L2758"></a><span id="L2758" class="LineNr">2758 </span> <span class="Delimiter">{</span> +<a name="L2759"></a><span id="L2759" class="LineNr">2759 </span> page-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">6/ctrl-f</span> +<a name="L2760"></a><span id="L2760" class="LineNr">2760 </span> <span class="muControl">break-unless</span> page-down? +<a name="L2761"></a><span id="L2761" class="LineNr">2761 </span> old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2762"></a><span id="L2762" class="LineNr">2762 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L2763"></a><span id="L2763" class="LineNr">2763 </span> page-down editor +<a name="L2764"></a><span id="L2764" class="LineNr">2764 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L2765"></a><span id="L2765" class="LineNr">2765 </span><span class="Constant"> <move-cursor-end></span> +<a name="L2766"></a><span id="L2766" class="LineNr">2766 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2767"></a><span id="L2767" class="LineNr">2767 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<a name="L2768"></a><span id="L2768" class="LineNr">2768 </span> <span class="muControl">return</span> movement?/go-render +<a name="L2769"></a><span id="L2769" class="LineNr">2769 </span> <span class="Delimiter">}</span> +<a name="L2770"></a><span id="L2770" class="LineNr">2770 </span>] +<a name="L2771"></a><span id="L2771" class="LineNr">2771 </span> +<a name="L2772"></a><span id="L2772" class="LineNr">2772 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L2773"></a><span id="L2773" class="LineNr">2773 </span> <span class="Delimiter">{</span> +<a name="L2774"></a><span id="L2774" class="LineNr">2774 </span> page-down?:bool <span class="Special"><-</span> equal k, <span class="Constant">65518/page-down</span> +<a name="L2775"></a><span id="L2775" class="LineNr">2775 </span> <span class="muControl">break-unless</span> page-down? +<a name="L2776"></a><span id="L2776" class="LineNr">2776 </span> old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2777"></a><span id="L2777" class="LineNr">2777 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L2778"></a><span id="L2778" class="LineNr">2778 </span> page-down editor +<a name="L2779"></a><span id="L2779" class="LineNr">2779 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L2780"></a><span id="L2780" class="LineNr">2780 </span><span class="Constant"> <move-cursor-end></span> +<a name="L2781"></a><span id="L2781" class="LineNr">2781 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2782"></a><span id="L2782" class="LineNr">2782 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<a name="L2783"></a><span id="L2783" class="LineNr">2783 </span> <span class="muControl">return</span> movement?/go-render +<a name="L2784"></a><span id="L2784" class="LineNr">2784 </span> <span class="Delimiter">}</span> +<a name="L2785"></a><span id="L2785" class="LineNr">2785 </span>] +<a name="L2786"></a><span id="L2786" class="LineNr">2786 </span> +<a name="L2787"></a><span id="L2787" class="LineNr">2787 </span><span class="Comment"># page-down skips entire wrapped lines, so it can't scroll past lines</span> +<a name="L2788"></a><span id="L2788" class="LineNr">2788 </span><span class="Comment"># taking up the entire screen</span> +<a name="L2789"></a><span id="L2789" class="LineNr">2789 </span><span class="muRecipe">def</span> page-down editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ +<a name="L2790"></a><span id="L2790" class="LineNr">2790 </span> <span class="Constant">local-scope</span> +<a name="L2791"></a><span id="L2791" class="LineNr">2791 </span> <span class="Constant">load-ingredients</span> +<a name="L2792"></a><span id="L2792" class="LineNr">2792 </span> <span class="Comment"># if editor contents don't overflow screen, do nothing</span> +<a name="L2793"></a><span id="L2793" class="LineNr">2793 </span> bottom-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">bottom-of-screen:offset</span> +<a name="L2794"></a><span id="L2794" class="LineNr">2794 </span> <span class="muControl">return-unless</span> bottom-of-screen +<a name="L2795"></a><span id="L2795" class="LineNr">2795 </span> <span class="Comment"># if not, position cursor at final character</span> +<a name="L2796"></a><span id="L2796" class="LineNr">2796 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L2797"></a><span id="L2797" class="LineNr">2797 </span> before-cursor:&:duplex-list:char <span class="Special"><-</span> prev bottom-of-screen +<a name="L2798"></a><span id="L2798" class="LineNr">2798 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L2799"></a><span id="L2799" class="LineNr">2799 </span> <span class="Comment"># keep one line in common with previous page</span> +<a name="L2800"></a><span id="L2800" class="LineNr">2800 </span> <span class="Delimiter">{</span> +<a name="L2801"></a><span id="L2801" class="LineNr">2801 </span> last:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> +<a name="L2802"></a><span id="L2802" class="LineNr">2802 </span> newline?:bool <span class="Special"><-</span> equal last, <span class="Constant">10/newline</span> +<a name="L2803"></a><span id="L2803" class="LineNr">2803 </span> <span class="muControl">break-unless</span> newline?:bool +<a name="L2804"></a><span id="L2804" class="LineNr">2804 </span> before-cursor <span class="Special"><-</span> prev before-cursor +<a name="L2805"></a><span id="L2805" class="LineNr">2805 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<a name="L2806"></a><span id="L2806" class="LineNr">2806 </span> <span class="Delimiter">}</span> +<a name="L2807"></a><span id="L2807" class="LineNr">2807 </span> <span class="Comment"># move cursor and top-of-screen to start of that line</span> +<a name="L2808"></a><span id="L2808" class="LineNr">2808 </span> move-to-start-of-line editor +<a name="L2809"></a><span id="L2809" class="LineNr">2809 </span> before-cursor <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<a name="L2810"></a><span id="L2810" class="LineNr">2810 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, before-cursor +<a name="L2811"></a><span id="L2811" class="LineNr">2811 </span>] +<a name="L2812"></a><span id="L2812" class="LineNr">2812 </span> +<a name="L2813"></a><span id="L2813" class="LineNr">2813 </span><span class="muScenario">scenario</span> editor-does-not-scroll-past-end [ +<a name="L2814"></a><span id="L2814" class="LineNr">2814 </span> <span class="Constant">local-scope</span> +<a name="L2815"></a><span id="L2815" class="LineNr">2815 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2816"></a><span id="L2816" class="LineNr">2816 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2817"></a><span id="L2817" class="LineNr">2817 </span><span class="Constant">b]</span> +<a name="L2818"></a><span id="L2818" class="LineNr">2818 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L2819"></a><span id="L2819" class="LineNr">2819 </span> editor-render screen, e +<a name="L2820"></a><span id="L2820" class="LineNr">2820 </span> screen-should-contain [ +<a name="L2821"></a><span id="L2821" class="LineNr">2821 </span> <span class="Constant"> . .</span> +<a name="L2822"></a><span id="L2822" class="LineNr">2822 </span> <span class="Constant"> .a .</span> +<a name="L2823"></a><span id="L2823" class="LineNr">2823 </span> <span class="Constant"> .b .</span> +<a name="L2824"></a><span id="L2824" class="LineNr">2824 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L2825"></a><span id="L2825" class="LineNr">2825 </span> ] +<a name="L2826"></a><span id="L2826" class="LineNr">2826 </span> <span class="Comment"># scroll down</span> +<a name="L2827"></a><span id="L2827" class="LineNr">2827 </span> assume-console [ +<a name="L2828"></a><span id="L2828" class="LineNr">2828 </span> press page-down +<a name="L2829"></a><span id="L2829" class="LineNr">2829 </span> ] +<a name="L2830"></a><span id="L2830" class="LineNr">2830 </span> run [ +<a name="L2831"></a><span id="L2831" class="LineNr">2831 </span> editor-event-loop screen, console, e +<a name="L2832"></a><span id="L2832" class="LineNr">2832 </span> ] +<a name="L2833"></a><span id="L2833" class="LineNr">2833 </span> <span class="Comment"># screen remains unmodified</span> +<a name="L2834"></a><span id="L2834" class="LineNr">2834 </span> screen-should-contain [ +<a name="L2835"></a><span id="L2835" class="LineNr">2835 </span> <span class="Constant"> . .</span> +<a name="L2836"></a><span id="L2836" class="LineNr">2836 </span> <span class="Constant"> .a .</span> +<a name="L2837"></a><span id="L2837" class="LineNr">2837 </span> <span class="Constant"> .b .</span> +<a name="L2838"></a><span id="L2838" class="LineNr">2838 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L2839"></a><span id="L2839" class="LineNr">2839 </span> ] +<a name="L2840"></a><span id="L2840" class="LineNr">2840 </span>] +<a name="L2841"></a><span id="L2841" class="LineNr">2841 </span> +<a name="L2842"></a><span id="L2842" class="LineNr">2842 </span><span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line [ +<a name="L2843"></a><span id="L2843" class="LineNr">2843 </span> <span class="Constant">local-scope</span> +<a name="L2844"></a><span id="L2844" class="LineNr">2844 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> +<a name="L2845"></a><span id="L2845" class="LineNr">2845 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2846"></a><span id="L2846" class="LineNr">2846 </span> <span class="Comment"># editor contains a long last line</span> +<a name="L2847"></a><span id="L2847" class="LineNr">2847 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2848"></a><span id="L2848" class="LineNr">2848 </span><span class="Constant">b</span> +<a name="L2849"></a><span id="L2849" class="LineNr">2849 </span><span class="Constant">cdefgh]</span> +<a name="L2850"></a><span id="L2850" class="LineNr">2850 </span> <span class="Comment"># editor screen triggers wrap of last line</span> +<a name="L2851"></a><span id="L2851" class="LineNr">2851 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<a name="L2852"></a><span id="L2852" class="LineNr">2852 </span> editor-render screen, e +<a name="L2853"></a><span id="L2853" class="LineNr">2853 </span> <span class="Comment"># some part of last line is not displayed</span> +<a name="L2854"></a><span id="L2854" class="LineNr">2854 </span> screen-should-contain [ +<a name="L2855"></a><span id="L2855" class="LineNr">2855 </span> <span class="Constant"> . .</span> +<a name="L2856"></a><span id="L2856" class="LineNr">2856 </span> <span class="Constant"> .a .</span> +<a name="L2857"></a><span id="L2857" class="LineNr">2857 </span> <span class="Constant"> .b .</span> +<a name="L2858"></a><span id="L2858" class="LineNr">2858 </span> <span class="Constant"> .cde↩ .</span> +<a name="L2859"></a><span id="L2859" class="LineNr">2859 </span> ] +<a name="L2860"></a><span id="L2860" class="LineNr">2860 </span> <span class="Comment"># scroll down</span> +<a name="L2861"></a><span id="L2861" class="LineNr">2861 </span> assume-console [ +<a name="L2862"></a><span id="L2862" class="LineNr">2862 </span> press page-down +<a name="L2863"></a><span id="L2863" class="LineNr">2863 </span> ] +<a name="L2864"></a><span id="L2864" class="LineNr">2864 </span> run [ +<a name="L2865"></a><span id="L2865" class="LineNr">2865 </span> editor-event-loop screen, console, e +<a name="L2866"></a><span id="L2866" class="LineNr">2866 </span> ] +<a name="L2867"></a><span id="L2867" class="LineNr">2867 </span> <span class="Comment"># screen shows entire wrapped line</span> +<a name="L2868"></a><span id="L2868" class="LineNr">2868 </span> screen-should-contain [ +<a name="L2869"></a><span id="L2869" class="LineNr">2869 </span> <span class="Constant"> . .</span> +<a name="L2870"></a><span id="L2870" class="LineNr">2870 </span> <span class="Constant"> .cde↩ .</span> +<a name="L2871"></a><span id="L2871" class="LineNr">2871 </span> <span class="Constant"> .fgh .</span> +<a name="L2872"></a><span id="L2872" class="LineNr">2872 </span> <span class="Constant"> .╌╌╌╌ .</span> +<a name="L2873"></a><span id="L2873" class="LineNr">2873 </span> ] +<a name="L2874"></a><span id="L2874" class="LineNr">2874 </span>] +<a name="L2875"></a><span id="L2875" class="LineNr">2875 </span> +<a name="L2876"></a><span id="L2876" class="LineNr">2876 </span><span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line-2 [ +<a name="L2877"></a><span id="L2877" class="LineNr">2877 </span> <span class="Constant">local-scope</span> +<a name="L2878"></a><span id="L2878" class="LineNr">2878 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> +<a name="L2879"></a><span id="L2879" class="LineNr">2879 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2880"></a><span id="L2880" class="LineNr">2880 </span> <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> +<a name="L2881"></a><span id="L2881" class="LineNr">2881 </span> <span class="Comment"># and still has something left over</span> +<a name="L2882"></a><span id="L2882" class="LineNr">2882 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2883"></a><span id="L2883" class="LineNr">2883 </span><span class="Constant">bcdefgh]</span> +<a name="L2884"></a><span id="L2884" class="LineNr">2884 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<a name="L2885"></a><span id="L2885" class="LineNr">2885 </span> editor-render screen, e +<a name="L2886"></a><span id="L2886" class="LineNr">2886 </span> <span class="Comment"># some part of last line is not displayed</span> +<a name="L2887"></a><span id="L2887" class="LineNr">2887 </span> screen-should-contain [ +<a name="L2888"></a><span id="L2888" class="LineNr">2888 </span> <span class="Constant"> . .</span> +<a name="L2889"></a><span id="L2889" class="LineNr">2889 </span> <span class="Constant"> .a .</span> +<a name="L2890"></a><span id="L2890" class="LineNr">2890 </span> <span class="Constant"> .bcd↩ .</span> +<a name="L2891"></a><span id="L2891" class="LineNr">2891 </span> <span class="Constant"> .efg↩ .</span> +<a name="L2892"></a><span id="L2892" class="LineNr">2892 </span> ] +<a name="L2893"></a><span id="L2893" class="LineNr">2893 </span> <span class="Comment"># scroll down</span> +<a name="L2894"></a><span id="L2894" class="LineNr">2894 </span> assume-console [ +<a name="L2895"></a><span id="L2895" class="LineNr">2895 </span> press page-down +<a name="L2896"></a><span id="L2896" class="LineNr">2896 </span> ] +<a name="L2897"></a><span id="L2897" class="LineNr">2897 </span> run [ +<a name="L2898"></a><span id="L2898" class="LineNr">2898 </span> editor-event-loop screen, console, e +<a name="L2899"></a><span id="L2899" class="LineNr">2899 </span> ] +<a name="L2900"></a><span id="L2900" class="LineNr">2900 </span> <span class="Comment"># screen shows entire wrapped line</span> +<a name="L2901"></a><span id="L2901" class="LineNr">2901 </span> screen-should-contain [ +<a name="L2902"></a><span id="L2902" class="LineNr">2902 </span> <span class="Constant"> . .</span> +<a name="L2903"></a><span id="L2903" class="LineNr">2903 </span> <span class="Constant"> .bcd↩ .</span> +<a name="L2904"></a><span id="L2904" class="LineNr">2904 </span> <span class="Constant"> .efg↩ .</span> +<a name="L2905"></a><span id="L2905" class="LineNr">2905 </span> <span class="Constant"> .h .</span> +<a name="L2906"></a><span id="L2906" class="LineNr">2906 </span> ] +<a name="L2907"></a><span id="L2907" class="LineNr">2907 </span>] +<a name="L2908"></a><span id="L2908" class="LineNr">2908 </span> +<a name="L2909"></a><span id="L2909" class="LineNr">2909 </span><span class="Comment"># ctrl-b/page-up - render previous page if it exists</span> +<a name="L2910"></a><span id="L2910" class="LineNr">2910 </span> +<a name="L2911"></a><span id="L2911" class="LineNr">2911 </span><span class="muScenario">scenario</span> editor-can-scroll-up [ +<a name="L2912"></a><span id="L2912" class="LineNr">2912 </span> <span class="Constant">local-scope</span> +<a name="L2913"></a><span id="L2913" class="LineNr">2913 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L2914"></a><span id="L2914" class="LineNr">2914 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L2915"></a><span id="L2915" class="LineNr">2915 </span><span class="Constant">b</span> +<a name="L2916"></a><span id="L2916" class="LineNr">2916 </span><span class="Constant">c</span> +<a name="L2917"></a><span id="L2917" class="LineNr">2917 </span><span class="Constant">d]</span> +<a name="L2918"></a><span id="L2918" class="LineNr">2918 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L2919"></a><span id="L2919" class="LineNr">2919 </span> editor-render screen, e +<a name="L2920"></a><span id="L2920" class="LineNr">2920 </span> screen-should-contain [ +<a name="L2921"></a><span id="L2921" class="LineNr">2921 </span> <span class="Constant"> . .</span> +<a name="L2922"></a><span id="L2922" class="LineNr">2922 </span> <span class="Constant"> .a .</span> +<a name="L2923"></a><span id="L2923" class="LineNr">2923 </span> <span class="Constant"> .b .</span> +<a name="L2924"></a><span id="L2924" class="LineNr">2924 </span> <span class="Constant"> .c .</span> +<a name="L2925"></a><span id="L2925" class="LineNr">2925 </span> ] +<a name="L2926"></a><span id="L2926" class="LineNr">2926 </span> <span class="Comment"># scroll down</span> +<a name="L2927"></a><span id="L2927" class="LineNr">2927 </span> assume-console [ +<a name="L2928"></a><span id="L2928" class="LineNr">2928 </span> press page-down +<a name="L2929"></a><span id="L2929" class="LineNr">2929 </span> ] +<a name="L2930"></a><span id="L2930" class="LineNr">2930 </span> run [ +<a name="L2931"></a><span id="L2931" class="LineNr">2931 </span> editor-event-loop screen, console, e +<a name="L2932"></a><span id="L2932" class="LineNr">2932 </span> ] +<a name="L2933"></a><span id="L2933" class="LineNr">2933 </span> <span class="Comment"># screen shows next page</span> +<a name="L2934"></a><span id="L2934" class="LineNr">2934 </span> screen-should-contain [ +<a name="L2935"></a><span id="L2935" class="LineNr">2935 </span> <span class="Constant"> . .</span> +<a name="L2936"></a><span id="L2936" class="LineNr">2936 </span> <span class="Constant"> .c .</span> +<a name="L2937"></a><span id="L2937" class="LineNr">2937 </span> <span class="Constant"> .d .</span> +<a name="L2938"></a><span id="L2938" class="LineNr">2938 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<a name="L2939"></a><span id="L2939" class="LineNr">2939 </span> ] +<a name="L2940"></a><span id="L2940" class="LineNr">2940 </span> <span class="Comment"># scroll back up</span> +<a name="L2941"></a><span id="L2941" class="LineNr">2941 </span> assume-console [ +<a name="L2942"></a><span id="L2942" class="LineNr">2942 </span> press page-up +<a name="L2943"></a><span id="L2943" class="LineNr">2943 </span> ] +<a name="L2944"></a><span id="L2944" class="LineNr">2944 </span> run [ +<a name="L2945"></a><span id="L2945" class="LineNr">2945 </span> editor-event-loop screen, console, e +<a name="L2946"></a><span id="L2946" class="LineNr">2946 </span> ] +<a name="L2947"></a><span id="L2947" class="LineNr">2947 </span> <span class="Comment"># screen shows original page again</span> +<a name="L2948"></a><span id="L2948" class="LineNr">2948 </span> screen-should-contain [ +<a name="L2949"></a><span id="L2949" class="LineNr">2949 </span> <span class="Constant"> . .</span> +<a name="L2950"></a><span id="L2950" class="LineNr">2950 </span> <span class="Constant"> .a .</span> +<a name="L2951"></a><span id="L2951" class="LineNr">2951 </span> <span class="Constant"> .b .</span> +<a name="L2952"></a><span id="L2952" class="LineNr">2952 </span> <span class="Constant"> .c .</span> +<a name="L2953"></a><span id="L2953" class="LineNr">2953 </span> ] +<a name="L2954"></a><span id="L2954" class="LineNr">2954 </span>] +<a name="L2955"></a><span id="L2955" class="LineNr">2955 </span> +<a name="L2956"></a><span id="L2956" class="LineNr">2956 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-character></span> [ +<a name="L2957"></a><span id="L2957" class="LineNr">2957 </span> <span class="Delimiter">{</span> +<a name="L2958"></a><span id="L2958" class="LineNr">2958 </span> page-up?:bool <span class="Special"><-</span> equal c, <span class="Constant">2/ctrl-b</span> +<a name="L2959"></a><span id="L2959" class="LineNr">2959 </span> <span class="muControl">break-unless</span> page-up? +<a name="L2960"></a><span id="L2960" class="LineNr">2960 </span> old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2961"></a><span id="L2961" class="LineNr">2961 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L2962"></a><span id="L2962" class="LineNr">2962 </span> editor <span class="Special"><-</span> page-up editor, screen-height +<a name="L2963"></a><span id="L2963" class="LineNr">2963 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L2964"></a><span id="L2964" class="LineNr">2964 </span><span class="Constant"> <move-cursor-end></span> +<a name="L2965"></a><span id="L2965" class="LineNr">2965 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2966"></a><span id="L2966" class="LineNr">2966 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<a name="L2967"></a><span id="L2967" class="LineNr">2967 </span> <span class="muControl">return</span> movement?/go-render +<a name="L2968"></a><span id="L2968" class="LineNr">2968 </span> <span class="Delimiter">}</span> +<a name="L2969"></a><span id="L2969" class="LineNr">2969 </span>] +<a name="L2970"></a><span id="L2970" class="LineNr">2970 </span> +<a name="L2971"></a><span id="L2971" class="LineNr">2971 </span><span class="muRecipe">after</span> <span class="Constant"><handle-special-key></span> [ +<a name="L2972"></a><span id="L2972" class="LineNr">2972 </span> <span class="Delimiter">{</span> +<a name="L2973"></a><span id="L2973" class="LineNr">2973 </span> page-up?:bool <span class="Special"><-</span> equal k, <span class="Constant">65519/page-up</span> +<a name="L2974"></a><span id="L2974" class="LineNr">2974 </span> <span class="muControl">break-unless</span> page-up? +<a name="L2975"></a><span id="L2975" class="LineNr">2975 </span> old-top:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2976"></a><span id="L2976" class="LineNr">2976 </span><span class="Constant"> <move-cursor-begin></span> +<a name="L2977"></a><span id="L2977" class="LineNr">2977 </span> editor <span class="Special"><-</span> page-up editor, screen-height +<a name="L2978"></a><span id="L2978" class="LineNr">2978 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<a name="L2979"></a><span id="L2979" class="LineNr">2979 </span><span class="Constant"> <move-cursor-end></span> +<a name="L2980"></a><span id="L2980" class="LineNr">2980 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2981"></a><span id="L2981" class="LineNr">2981 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<a name="L2982"></a><span id="L2982" class="LineNr">2982 </span> <span class="Comment"># don't bother re-rendering if nothing changed. todo: test this</span> +<a name="L2983"></a><span id="L2983" class="LineNr">2983 </span> <span class="muControl">return</span> movement?/go-render +<a name="L2984"></a><span id="L2984" class="LineNr">2984 </span> <span class="Delimiter">}</span> +<a name="L2985"></a><span id="L2985" class="LineNr">2985 </span>] +<a name="L2986"></a><span id="L2986" class="LineNr">2986 </span> +<a name="L2987"></a><span id="L2987" class="LineNr">2987 </span><span class="muRecipe">def</span> page-up editor:&:editor, screen-height:num<span class="muRecipe"> -> </span>editor:&:editor [ +<a name="L2988"></a><span id="L2988" class="LineNr">2988 </span> <span class="Constant">local-scope</span> +<a name="L2989"></a><span id="L2989" class="LineNr">2989 </span> <span class="Constant">load-ingredients</span> +<a name="L2990"></a><span id="L2990" class="LineNr">2990 </span> max:num <span class="Special"><-</span> subtract screen-height, <span class="Constant">1/menu-bar</span>, <span class="Constant">1/overlapping-line</span> +<a name="L2991"></a><span id="L2991" class="LineNr">2991 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<a name="L2992"></a><span id="L2992" class="LineNr">2992 </span> top-of-screen:&:duplex-list:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<a name="L2993"></a><span id="L2993" class="LineNr">2993 </span> <span class="Delimiter">{</span> +<a name="L2994"></a><span id="L2994" class="LineNr">2994 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max +<a name="L2995"></a><span id="L2995" class="LineNr">2995 </span> <span class="muControl">break-if</span> done? +<a name="L2996"></a><span id="L2996" class="LineNr">2996 </span> prev:&:duplex-list:char <span class="Special"><-</span> before-previous-line top-of-screen, editor +<a name="L2997"></a><span id="L2997" class="LineNr">2997 </span> <span class="muControl">break-unless</span> prev +<a name="L2998"></a><span id="L2998" class="LineNr">2998 </span> top-of-screen <span class="Special"><-</span> copy prev +<a name="L2999"></a><span id="L2999" class="LineNr">2999 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen +<a name="L3000"></a><span id="L3000" class="LineNr">3000 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<a name="L3001"></a><span id="L3001" class="LineNr">3001 </span> <span class="muControl">loop</span> +<a name="L3002"></a><span id="L3002" class="LineNr">3002 </span> <span class="Delimiter">}</span> +<a name="L3003"></a><span id="L3003" class="LineNr">3003 </span>] +<a name="L3004"></a><span id="L3004" class="LineNr">3004 </span> +<a name="L3005"></a><span id="L3005" class="LineNr">3005 </span><span class="muScenario">scenario</span> editor-can-scroll-up-multiple-pages [ +<a name="L3006"></a><span id="L3006" class="LineNr">3006 </span> <span class="Constant">local-scope</span> +<a name="L3007"></a><span id="L3007" class="LineNr">3007 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<a name="L3008"></a><span id="L3008" class="LineNr">3008 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L3009"></a><span id="L3009" class="LineNr">3009 </span> <span class="Comment"># initialize editor with 8 lines</span> +<a name="L3010"></a><span id="L3010" class="LineNr">3010 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L3011"></a><span id="L3011" class="LineNr">3011 </span><span class="Constant">b</span> +<a name="L3012"></a><span id="L3012" class="LineNr">3012 </span><span class="Constant">c</span> +<a name="L3013"></a><span id="L3013" class="LineNr">3013 </span><span class="Constant">d</span> +<a name="L3014"></a><span id="L3014" class="LineNr">3014 </span><span class="Constant">e</span> +<a name="L3015"></a><span id="L3015" class="LineNr">3015 </span><span class="Constant">f</span> +<a name="L3016"></a><span id="L3016" class="LineNr">3016 </span><span class="Constant">g</span> +<a name="L3017"></a><span id="L3017" class="LineNr">3017 </span><span class="Constant">h]</span> +<a name="L3018"></a><span id="L3018" class="LineNr">3018 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<a name="L3019"></a><span id="L3019" class="LineNr">3019 </span> editor-render screen, e +<a name="L3020"></a><span id="L3020" class="LineNr">3020 </span> screen-should-contain [ +<a name="L3021"></a><span id="L3021" class="LineNr">3021 </span> <span class="Constant"> . .</span> +<a name="L3022"></a><span id="L3022" class="LineNr">3022 </span> <span class="Constant"> .a .</span> +<a name="L3023"></a><span id="L3023" class="LineNr">3023 </span> <span class="Constant"> .b .</span> +<a name="L3024"></a><span id="L3024" class="LineNr">3024 </span> <span class="Constant"> .c .</span> +<a name="L3025"></a><span id="L3025" class="LineNr">3025 </span> ] +<a name="L3026"></a><span id="L3026" class="LineNr">3026 </span> <span class="Comment"># scroll down two pages</span> +<a name="L3027"></a><span id="L3027" class="LineNr">3027 </span> assume-console [ +<a name="L3028"></a><span id="L3028" class="LineNr">3028 </span> press page-down +<a name="L3029"></a><span id="L3029" class="LineNr">3029 </span> press page-down +<a name="L3030"></a><span id="L3030" class="LineNr">3030 </span> ] +<a name="L3031"></a><span id="L3031" class="LineNr">3031 </span> run [ +<a name="L3032"></a><span id="L3032" class="LineNr">3032 </span> editor-event-loop screen, console, e +<a name="L3033"></a><span id="L3033" class="LineNr">3033 </span> ] +<a name="L3034"></a><span id="L3034" class="LineNr">3034 </span> <span class="Comment"># screen shows third page</span> +<a name="L3035"></a><span id="L3035" class="LineNr">3035 </span> screen-should-contain [ +<a name="L3036"></a><span id="L3036" class="LineNr">3036 </span> <span class="Constant"> . .</span> +<a name="L3037"></a><span id="L3037" class="LineNr">3037 </span> <span class="Constant"> .e .</span> +<a name="L3038"></a><span id="L3038" class="LineNr">3038 </span> <span class="Constant"> .f .</span> +<a name="L3039"></a><span id="L3039" class="LineNr">3039 </span> <span class="Constant"> .g .</span> +<a name="L3040"></a><span id="L3040" class="LineNr">3040 </span> ] +<a name="L3041"></a><span id="L3041" class="LineNr">3041 </span> <span class="Comment"># scroll up</span> +<a name="L3042"></a><span id="L3042" class="LineNr">3042 </span> assume-console [ +<a name="L3043"></a><span id="L3043" class="LineNr">3043 </span> press page-up +<a name="L3044"></a><span id="L3044" class="LineNr">3044 </span> ] +<a name="L3045"></a><span id="L3045" class="LineNr">3045 </span> run [ +<a name="L3046"></a><span id="L3046" class="LineNr">3046 </span> editor-event-loop screen, console, e +<a name="L3047"></a><span id="L3047" class="LineNr">3047 </span> ] +<a name="L3048"></a><span id="L3048" class="LineNr">3048 </span> <span class="Comment"># screen shows second page</span> +<a name="L3049"></a><span id="L3049" class="LineNr">3049 </span> screen-should-contain [ +<a name="L3050"></a><span id="L3050" class="LineNr">3050 </span> <span class="Constant"> . .</span> +<a name="L3051"></a><span id="L3051" class="LineNr">3051 </span> <span class="Constant"> .c .</span> +<a name="L3052"></a><span id="L3052" class="LineNr">3052 </span> <span class="Constant"> .d .</span> +<a name="L3053"></a><span id="L3053" class="LineNr">3053 </span> <span class="Constant"> .e .</span> +<a name="L3054"></a><span id="L3054" class="LineNr">3054 </span> ] +<a name="L3055"></a><span id="L3055" class="LineNr">3055 </span> <span class="Comment"># scroll up again</span> +<a name="L3056"></a><span id="L3056" class="LineNr">3056 </span> assume-console [ +<a name="L3057"></a><span id="L3057" class="LineNr">3057 </span> press page-up +<a name="L3058"></a><span id="L3058" class="LineNr">3058 </span> ] +<a name="L3059"></a><span id="L3059" class="LineNr">3059 </span> run [ +<a name="L3060"></a><span id="L3060" class="LineNr">3060 </span> editor-event-loop screen, console, e +<a name="L3061"></a><span id="L3061" class="LineNr">3061 </span> ] +<a name="L3062"></a><span id="L3062" class="LineNr">3062 </span> <span class="Comment"># screen shows original page again</span> +<a name="L3063"></a><span id="L3063" class="LineNr">3063 </span> screen-should-contain [ +<a name="L3064"></a><span id="L3064" class="LineNr">3064 </span> <span class="Constant"> . .</span> +<a name="L3065"></a><span id="L3065" class="LineNr">3065 </span> <span class="Constant"> .a .</span> +<a name="L3066"></a><span id="L3066" class="LineNr">3066 </span> <span class="Constant"> .b .</span> +<a name="L3067"></a><span id="L3067" class="LineNr">3067 </span> <span class="Constant"> .c .</span> +<a name="L3068"></a><span id="L3068" class="LineNr">3068 </span> ] +<a name="L3069"></a><span id="L3069" class="LineNr">3069 </span>] +<a name="L3070"></a><span id="L3070" class="LineNr">3070 </span> +<a name="L3071"></a><span id="L3071" class="LineNr">3071 </span><span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines [ +<a name="L3072"></a><span id="L3072" class="LineNr">3072 </span> <span class="Constant">local-scope</span> +<a name="L3073"></a><span id="L3073" class="LineNr">3073 </span> <span class="Comment"># screen has 1 line for menu + 5 lines for text</span> +<a name="L3074"></a><span id="L3074" class="LineNr">3074 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">6/height</span> +<a name="L3075"></a><span id="L3075" class="LineNr">3075 </span> <span class="Comment"># editor contains a long line in the first page</span> +<a name="L3076"></a><span id="L3076" class="LineNr">3076 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L3077"></a><span id="L3077" class="LineNr">3077 </span><span class="Constant">b</span> +<a name="L3078"></a><span id="L3078" class="LineNr">3078 </span><span class="Constant">cdefgh</span> +<a name="L3079"></a><span id="L3079" class="LineNr">3079 </span><span class="Constant">i</span> +<a name="L3080"></a><span id="L3080" class="LineNr">3080 </span><span class="Constant">j</span> +<a name="L3081"></a><span id="L3081" class="LineNr">3081 </span><span class="Constant">k</span> +<a name="L3082"></a><span id="L3082" class="LineNr">3082 </span><span class="Constant">l</span> +<a name="L3083"></a><span id="L3083" class="LineNr">3083 </span><span class="Constant">m</span> +<a name="L3084"></a><span id="L3084" class="LineNr">3084 </span><span class="Constant">n</span> +<a name="L3085"></a><span id="L3085" class="LineNr">3085 </span><span class="Constant">o]</span> +<a name="L3086"></a><span id="L3086" class="LineNr">3086 </span> <span class="Comment"># editor screen triggers wrap of last line</span> +<a name="L3087"></a><span id="L3087" class="LineNr">3087 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<a name="L3088"></a><span id="L3088" class="LineNr">3088 </span> editor-render screen, e +<a name="L3089"></a><span id="L3089" class="LineNr">3089 </span> <span class="Comment"># some part of last line is not displayed</span> +<a name="L3090"></a><span id="L3090" class="LineNr">3090 </span> screen-should-contain [ +<a name="L3091"></a><span id="L3091" class="LineNr">3091 </span> <span class="Constant"> . .</span> +<a name="L3092"></a><span id="L3092" class="LineNr">3092 </span> <span class="Constant"> .a .</span> +<a name="L3093"></a><span id="L3093" class="LineNr">3093 </span> <span class="Constant"> .b .</span> +<a name="L3094"></a><span id="L3094" class="LineNr">3094 </span> <span class="Constant"> .cde↩ .</span> +<a name="L3095"></a><span id="L3095" class="LineNr">3095 </span> <span class="Constant"> .fgh .</span> +<a name="L3096"></a><span id="L3096" class="LineNr">3096 </span> <span class="Constant"> .i .</span> +<a name="L3097"></a><span id="L3097" class="LineNr">3097 </span> ] +<a name="L3098"></a><span id="L3098" class="LineNr">3098 </span> <span class="Comment"># scroll down a page and a line</span> +<a name="L3099"></a><span id="L3099" class="LineNr">3099 </span> assume-console [ +<a name="L3100"></a><span id="L3100" class="LineNr">3100 </span> press page-down +<a name="L3101"></a><span id="L3101" class="LineNr">3101 </span> left-click<span class="Constant"> 5</span>,<span class="Constant"> 0</span> +<a name="L3102"></a><span id="L3102" class="LineNr">3102 </span> press down-arrow +<a name="L3103"></a><span id="L3103" class="LineNr">3103 </span> ] +<a name="L3104"></a><span id="L3104" class="LineNr">3104 </span> run [ +<a name="L3105"></a><span id="L3105" class="LineNr">3105 </span> editor-event-loop screen, console, e +<a name="L3106"></a><span id="L3106" class="LineNr">3106 </span> ] +<a name="L3107"></a><span id="L3107" class="LineNr">3107 </span> <span class="Comment"># screen shows entire wrapped line</span> +<a name="L3108"></a><span id="L3108" class="LineNr">3108 </span> screen-should-contain [ +<a name="L3109"></a><span id="L3109" class="LineNr">3109 </span> <span class="Constant"> . .</span> +<a name="L3110"></a><span id="L3110" class="LineNr">3110 </span> <span class="Constant"> .j .</span> +<a name="L3111"></a><span id="L3111" class="LineNr">3111 </span> <span class="Constant"> .k .</span> +<a name="L3112"></a><span id="L3112" class="LineNr">3112 </span> <span class="Constant"> .l .</span> +<a name="L3113"></a><span id="L3113" class="LineNr">3113 </span> <span class="Constant"> .m .</span> +<a name="L3114"></a><span id="L3114" class="LineNr">3114 </span> <span class="Constant"> .n .</span> +<a name="L3115"></a><span id="L3115" class="LineNr">3115 </span> ] +<a name="L3116"></a><span id="L3116" class="LineNr">3116 </span> <span class="Comment"># now scroll up one page</span> +<a name="L3117"></a><span id="L3117" class="LineNr">3117 </span> assume-console [ +<a name="L3118"></a><span id="L3118" class="LineNr">3118 </span> press page-up +<a name="L3119"></a><span id="L3119" class="LineNr">3119 </span> ] +<a name="L3120"></a><span id="L3120" class="LineNr">3120 </span> run [ +<a name="L3121"></a><span id="L3121" class="LineNr">3121 </span> editor-event-loop screen, console, e +<a name="L3122"></a><span id="L3122" class="LineNr">3122 </span> ] +<a name="L3123"></a><span id="L3123" class="LineNr">3123 </span> <span class="Comment"># screen resets</span> +<a name="L3124"></a><span id="L3124" class="LineNr">3124 </span> screen-should-contain [ +<a name="L3125"></a><span id="L3125" class="LineNr">3125 </span> <span class="Constant"> . .</span> +<a name="L3126"></a><span id="L3126" class="LineNr">3126 </span> <span class="Constant"> .b .</span> +<a name="L3127"></a><span id="L3127" class="LineNr">3127 </span> <span class="Constant"> .cde↩ .</span> +<a name="L3128"></a><span id="L3128" class="LineNr">3128 </span> <span class="Constant"> .fgh .</span> +<a name="L3129"></a><span id="L3129" class="LineNr">3129 </span> <span class="Constant"> .i .</span> +<a name="L3130"></a><span id="L3130" class="LineNr">3130 </span> <span class="Constant"> .j .</span> +<a name="L3131"></a><span id="L3131" class="LineNr">3131 </span> ] +<a name="L3132"></a><span id="L3132" class="LineNr">3132 </span>] +<a name="L3133"></a><span id="L3133" class="LineNr">3133 </span> +<a name="L3134"></a><span id="L3134" class="LineNr">3134 </span><span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines-2 [ +<a name="L3135"></a><span id="L3135" class="LineNr">3135 </span> <span class="Constant">local-scope</span> +<a name="L3136"></a><span id="L3136" class="LineNr">3136 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> +<a name="L3137"></a><span id="L3137" class="LineNr">3137 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L3138"></a><span id="L3138" class="LineNr">3138 </span> <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> +<a name="L3139"></a><span id="L3139" class="LineNr">3139 </span> <span class="Comment"># and still has something left over</span> +<a name="L3140"></a><span id="L3140" class="LineNr">3140 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<a name="L3141"></a><span id="L3141" class="LineNr">3141 </span><span class="Constant">bcdefgh]</span> +<a name="L3142"></a><span id="L3142" class="LineNr">3142 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<a name="L3143"></a><span id="L3143" class="LineNr">3143 </span> editor-render screen, e +<a name="L3144"></a><span id="L3144" class="LineNr">3144 </span> <span class="Comment"># some part of last line is not displayed</span> +<a name="L3145"></a><span id="L3145" class="LineNr">3145 </span> screen-should-contain [ +<a name="L3146"></a><span id="L3146" class="LineNr">3146 </span> <span class="Constant"> . .</span> +<a name="L3147"></a><span id="L3147" class="LineNr">3147 </span> <span class="Constant"> .a .</span> +<a name="L3148"></a><span id="L3148" class="LineNr">3148 </span> <span class="Constant"> .bcd↩ .</span> +<a name="L3149"></a><span id="L3149" class="LineNr">3149 </span> <span class="Constant"> .efg↩ .</span> +<a name="L3150"></a><span id="L3150" class="LineNr">3150 </span> ] +<a name="L3151"></a><span id="L3151" class="LineNr">3151 </span> <span class="Comment"># scroll down</span> +<a name="L3152"></a><span id="L3152" class="LineNr">3152 </span> assume-console [ +<a name="L3153"></a><span id="L3153" class="LineNr">3153 </span> press page-down +<a name="L3154"></a><span id="L3154" class="LineNr">3154 </span> ] +<a name="L3155"></a><span id="L3155" class="LineNr">3155 </span> run [ +<a name="L3156"></a><span id="L3156" class="LineNr">3156 </span> editor-event-loop screen, console, e +<a name="L3157"></a><span id="L3157" class="LineNr">3157 </span> ] +<a name="L3158"></a><span id="L3158" class="LineNr">3158 </span> <span class="Comment"># screen shows entire wrapped line</span> +<a name="L3159"></a><span id="L3159" class="LineNr">3159 </span> screen-should-contain [ +<a name="L3160"></a><span id="L3160" class="LineNr">3160 </span> <span class="Constant"> . .</span> +<a name="L3161"></a><span id="L3161" class="LineNr">3161 </span> <span class="Constant"> .bcd↩ .</span> +<a name="L3162"></a><span id="L3162" class="LineNr">3162 </span> <span class="Constant"> .efg↩ .</span> +<a name="L3163"></a><span id="L3163" class="LineNr">3163 </span> <span class="Constant"> .h .</span> +<a name="L3164"></a><span id="L3164" class="LineNr">3164 </span> ] +<a name="L3165"></a><span id="L3165" class="LineNr">3165 </span> <span class="Comment"># scroll back up</span> +<a name="L3166"></a><span id="L3166" class="LineNr">3166 </span> assume-console [ +<a name="L3167"></a><span id="L3167" class="LineNr">3167 </span> press page-up +<a name="L3168"></a><span id="L3168" class="LineNr">3168 </span> ] +<a name="L3169"></a><span id="L3169" class="LineNr">3169 </span> run [ +<a name="L3170"></a><span id="L3170" class="LineNr">3170 </span> editor-event-loop screen, console, e +<a name="L3171"></a><span id="L3171" class="LineNr">3171 </span> ] +<a name="L3172"></a><span id="L3172" class="LineNr">3172 </span> <span class="Comment"># screen resets</span> +<a name="L3173"></a><span id="L3173" class="LineNr">3173 </span> screen-should-contain [ +<a name="L3174"></a><span id="L3174" class="LineNr">3174 </span> <span class="Constant"> . .</span> +<a name="L3175"></a><span id="L3175" class="LineNr">3175 </span> <span class="Constant"> .a .</span> +<a name="L3176"></a><span id="L3176" class="LineNr">3176 </span> <span class="Constant"> .bcd↩ .</span> +<a name="L3177"></a><span id="L3177" class="LineNr">3177 </span> <span class="Constant"> .efg↩ .</span> +<a name="L3178"></a><span id="L3178" class="LineNr">3178 </span> ] +<a name="L3179"></a><span id="L3179" class="LineNr">3179 </span>] +<a name="L3180"></a><span id="L3180" class="LineNr">3180 </span> +<a name="L3181"></a><span id="L3181" class="LineNr">3181 </span><span class="muScenario">scenario</span> editor-can-scroll-up-past-nonempty-lines [ +<a name="L3182"></a><span id="L3182" class="LineNr">3182 </span> <span class="Constant">local-scope</span> +<a name="L3183"></a><span id="L3183" class="LineNr">3183 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L3184"></a><span id="L3184" class="LineNr">3184 </span> <span class="Comment"># text with empty line in second screen</span> +<a name="L3185"></a><span id="L3185" class="LineNr">3185 </span> s:text <span class="Special"><-</span> new <span class="Constant">[axx</span> +<a name="L3186"></a><span id="L3186" class="LineNr">3186 </span><span class="Constant">bxx</span> +<a name="L3187"></a><span id="L3187" class="LineNr">3187 </span><span class="Constant">cxx</span> +<a name="L3188"></a><span id="L3188" class="LineNr">3188 </span><span class="Constant">dxx</span> +<a name="L3189"></a><span id="L3189" class="LineNr">3189 </span><span class="Constant">exx</span> +<a name="L3190"></a><span id="L3190" class="LineNr">3190 </span><span class="Constant">fxx</span> +<a name="L3191"></a><span id="L3191" class="LineNr">3191 </span><span class="Constant">gxx</span> +<a name="L3192"></a><span id="L3192" class="LineNr">3192 </span><span class="Constant">hxx</span> +<a name="L3193"></a><span id="L3193" class="LineNr">3193 </span><span class="Constant">]</span> +<a name="L3194"></a><span id="L3194" class="LineNr">3194 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<a name="L3195"></a><span id="L3195" class="LineNr">3195 </span> editor-render screen, e +<a name="L3196"></a><span id="L3196" class="LineNr">3196 </span> screen-should-contain [ +<a name="L3197"></a><span id="L3197" class="LineNr">3197 </span> <span class="Constant"> . .</span> +<a name="L3198"></a><span id="L3198" class="LineNr">3198 </span> <span class="Constant"> .axx .</span> +<a name="L3199"></a><span id="L3199" class="LineNr">3199 </span> <span class="Constant"> .bxx .</span> +<a name="L3200"></a><span id="L3200" class="LineNr">3200 </span> <span class="Constant"> .cxx .</span> +<a name="L3201"></a><span id="L3201" class="LineNr">3201 </span> ] +<a name="L3202"></a><span id="L3202" class="LineNr">3202 </span> assume-console [ +<a name="L3203"></a><span id="L3203" class="LineNr">3203 </span> press page-down +<a name="L3204"></a><span id="L3204" class="LineNr">3204 </span> ] +<a name="L3205"></a><span id="L3205" class="LineNr">3205 </span> run [ +<a name="L3206"></a><span id="L3206" class="LineNr">3206 </span> editor-event-loop screen, console, e +<a name="L3207"></a><span id="L3207" class="LineNr">3207 </span> ] +<a name="L3208"></a><span id="L3208" class="LineNr">3208 </span> screen-should-contain [ +<a name="L3209"></a><span id="L3209" class="LineNr">3209 </span> <span class="Constant"> . .</span> +<a name="L3210"></a><span id="L3210" class="LineNr">3210 </span> <span class="Constant"> .cxx .</span> +<a name="L3211"></a><span id="L3211" class="LineNr">3211 </span> <span class="Constant"> .dxx .</span> +<a name="L3212"></a><span id="L3212" class="LineNr">3212 </span> <span class="Constant"> .exx .</span> +<a name="L3213"></a><span id="L3213" class="LineNr">3213 </span> ] +<a name="L3214"></a><span id="L3214" class="LineNr">3214 </span> assume-console [ +<a name="L3215"></a><span id="L3215" class="LineNr">3215 </span> press page-down +<a name="L3216"></a><span id="L3216" class="LineNr">3216 </span> ] +<a name="L3217"></a><span id="L3217" class="LineNr">3217 </span> run [ +<a name="L3218"></a><span id="L3218" class="LineNr">3218 </span> editor-event-loop screen, console, e +<a name="L3219"></a><span id="L3219" class="LineNr">3219 </span> ] +<a name="L3220"></a><span id="L3220" class="LineNr">3220 </span> screen-should-contain [ +<a name="L3221"></a><span id="L3221" class="LineNr">3221 </span> <span class="Constant"> . .</span> +<a name="L3222"></a><span id="L3222" class="LineNr">3222 </span> <span class="Constant"> .exx .</span> +<a name="L3223"></a><span id="L3223" class="LineNr">3223 </span> <span class="Constant"> .fxx .</span> +<a name="L3224"></a><span id="L3224" class="LineNr">3224 </span> <span class="Constant"> .gxx .</span> +<a name="L3225"></a><span id="L3225" class="LineNr">3225 </span> ] +<a name="L3226"></a><span id="L3226" class="LineNr">3226 </span> <span class="Comment"># scroll back up past empty line</span> +<a name="L3227"></a><span id="L3227" class="LineNr">3227 </span> assume-console [ +<a name="L3228"></a><span id="L3228" class="LineNr">3228 </span> press page-up +<a name="L3229"></a><span id="L3229" class="LineNr">3229 </span> ] +<a name="L3230"></a><span id="L3230" class="LineNr">3230 </span> run [ +<a name="L3231"></a><span id="L3231" class="LineNr">3231 </span> editor-event-loop screen, console, e +<a name="L3232"></a><span id="L3232" class="LineNr">3232 </span> ] +<a name="L3233"></a><span id="L3233" class="LineNr">3233 </span> screen-should-contain [ +<a name="L3234"></a><span id="L3234" class="LineNr">3234 </span> <span class="Constant"> . .</span> +<a name="L3235"></a><span id="L3235" class="LineNr">3235 </span> <span class="Constant"> .cxx .</span> +<a name="L3236"></a><span id="L3236" class="LineNr">3236 </span> <span class="Constant"> .dxx .</span> +<a name="L3237"></a><span id="L3237" class="LineNr">3237 </span> <span class="Constant"> .exx .</span> +<a name="L3238"></a><span id="L3238" class="LineNr">3238 </span> ] +<a name="L3239"></a><span id="L3239" class="LineNr">3239 </span>] +<a name="L3240"></a><span id="L3240" class="LineNr">3240 </span> +<a name="L3241"></a><span id="L3241" class="LineNr">3241 </span><span class="muScenario">scenario</span> editor-can-scroll-up-past-empty-lines [ +<a name="L3242"></a><span id="L3242" class="LineNr">3242 </span> <span class="Constant">local-scope</span> +<a name="L3243"></a><span id="L3243" class="LineNr">3243 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<a name="L3244"></a><span id="L3244" class="LineNr">3244 </span> <span class="Comment"># text with empty line in second screen</span> +<a name="L3245"></a><span id="L3245" class="LineNr">3245 </span> s:text <span class="Special"><-</span> new <span class="Constant">[axy</span> +<a name="L3246"></a><span id="L3246" class="LineNr">3246 </span><span class="Constant">bxy</span> +<a name="L3247"></a><span id="L3247" class="LineNr">3247 </span><span class="Constant">cxy</span> +<a name="L3248"></a><span id="L3248" class="LineNr">3248 </span> +<a name="L3249"></a><span id="L3249" class="LineNr">3249 </span>dxy +<a name="L3250"></a><span id="L3250" class="LineNr">3250 </span>exy +<a name="L3251"></a><span id="L3251" class="LineNr">3251 </span>fxy +<a name="L3252"></a><span id="L3252" class="LineNr">3252 </span>gxy +<a name="L3253"></a><span id="L3253" class="LineNr">3253 </span>] +<a name="L3254"></a><span id="L3254" class="LineNr">3254 </span> e:&:editor <span class="Special"><-</span> new-editor s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<a name="L3255"></a><span id="L3255" class="LineNr">3255 </span> editor-render screen, e +<a name="L3256"></a><span id="L3256" class="LineNr">3256 </span> screen-should-contain [ +<a name="L3257"></a><span id="L3257" class="LineNr">3257 </span> <span class="Constant"> . .</span> +<a name="L3258"></a><span id="L3258" class="LineNr">3258 </span> <span class="Constant"> .axy .</span> +<a name="L3259"></a><span id="L3259" class="LineNr">3259 </span> <span class="Constant"> .bxy .</span> +<a name="L3260"></a><span id="L3260" class="LineNr">3260 </span> <span class="Constant"> .cxy .</span> +<a name="L3261"></a><span id="L3261" class="LineNr">3261 </span> ] +<a name="L3262"></a><span id="L3262" class="LineNr">3262 </span> assume-console [ +<a name="L3263"></a><span id="L3263" class="LineNr">3263 </span> press page-down +<a name="L3264"></a><span id="L3264" class="LineNr">3264 </span> ] +<a name="L3265"></a><span id="L3265" class="LineNr">3265 </span> run [ +<a name="L3266"></a><span id="L3266" class="LineNr">3266 </span> editor-event-loop screen, console, e +<a name="L3267"></a><span id="L3267" class="LineNr">3267 </span> ] +<a name="L3268"></a><span id="L3268" class="LineNr">3268 </span> screen-should-contain [ +<a name="L3269"></a><span id="L3269" class="LineNr">3269 </span> <span class="Constant"> . .</span> +<a name="L3270"></a><span id="L3270" class="LineNr">3270 </span> <span class="Constant"> .cxy .</span> +<a name="L3271"></a><span id="L3271" class="LineNr">3271 </span> <span class="Constant"> . .</span> +<a name="L3272"></a><span id="L3272" class="LineNr">3272 </span> <span class="Constant"> .dxy .</span> +<a name="L3273"></a><span id="L3273" class="LineNr">3273 </span> ] +<a name="L3274"></a><span id="L3274" class="LineNr">3274 </span> assume-console [ +<a name="L3275"></a><span id="L3275" class="LineNr">3275 </span> press page-down +<a name="L3276"></a><span id="L3276" class="LineNr">3276 </span> ] +<a name="L3277"></a><span id="L3277" class="LineNr">3277 </span> run [ +<a name="L3278"></a><span id="L3278" class="LineNr">3278 </span> editor-event-loop screen, console, e +<a name="L3279"></a><span id="L3279" class="LineNr">3279 </span> ] +<a name="L3280"></a><span id="L3280" class="LineNr">3280 </span> screen-should-contain [ +<a name="L3281"></a><span id="L3281" class="LineNr">3281 </span> <span class="Constant"> . .</span> +<a name="L3282"></a><span id="L3282" class="LineNr">3282 </span> <span class="Constant"> .dxy .</span> +<a name="L3283"></a><span id="L3283" class="LineNr">3283 </span> <span class="Constant"> .exy .</span> +<a name="L3284"></a><span id="L3284" class="LineNr">3284 </span> <span class="Constant"> .fxy .</span> +<a name="L3285"></a><span id="L3285" class="LineNr">3285 </span> ] +<a name="L3286"></a><span id="L3286" class="LineNr">3286 </span> <span class="Comment"># scroll back up past empty line</span> +<a name="L3287"></a><span id="L3287" class="LineNr">3287 </span> assume-console [ +<a name="L3288"></a><span id="L3288" class="LineNr">3288 </span> press page-up +<a name="L3289"></a><span id="L3289" class="LineNr">3289 </span> ] +<a name="L3290"></a><span id="L3290" class="LineNr">3290 </span> run [ +<a name="L3291"></a><span id="L3291" class="LineNr">3291 </span> editor-event-loop screen, console, e +<a name="L3292"></a><span id="L3292" class="LineNr">3292 </span> ] +<a name="L3293"></a><span id="L3293" class="LineNr">3293 </span> screen-should-contain [ +<a name="L3294"></a><span id="L3294" class="LineNr">3294 </span> <span class="Constant"> . .</span> +<a name="L3295"></a><span id="L3295" class="LineNr">3295 </span> <span class="Constant"> .cxy .</span> +<a name="L3296"></a><span id="L3296" class="LineNr">3296 </span> <span class="Constant"> . .</span> +<a name="L3297"></a><span id="L3297" class="LineNr">3297 </span> <span class="Constant"> .dxy .</span> +<a name="L3298"></a><span id="L3298" class="LineNr">3298 </span> ] +<a name="L3299"></a><span id="L3299" class="LineNr">3299 </span>] </pre> </body> </html> |