diff options
| author | Kartik K. Agaram <vc@akkartik.com> | 2015-09-07 10:37:27 -0700 |
|---|---|---|
| committer | Kartik K. Agaram <vc@akkartik.com> | 2015-09-07 10:37:27 -0700 |
| commit | f5465e1220d73e237c51897b7d1211ec53b0dc04 (patch) | |
| tree | 939ee8e57241b8515aede8106c6420e330ace75a /html/edit/001-editor.mu.html | |
| parent | 5ccf2653fb7d31b013f77df4e92e964e45c54f8a (diff) | |
| download | mu-f5465e1220d73e237c51897b7d1211ec53b0dc04.tar.gz | |
2177
Diffstat (limited to 'html/edit/001-editor.mu.html')
| -rw-r--r-- | html/edit/001-editor.mu.html | 539 |
1 files changed, 539 insertions, 0 deletions
diff --git a/html/edit/001-editor.mu.html b/html/edit/001-editor.mu.html new file mode 100644 index 00000000..be568c9d --- /dev/null +++ b/html/edit/001-editor.mu.html @@ -0,0 +1,539 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> +<html> +<head> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<title>Mu - edit/001-editor.mu</title> +<meta name="Generator" content="Vim/7.4"> +<meta name="plugin-version" content="vim7.4_v1"> +<meta name="syntax" content="none"> +<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy="> +<meta name="colorscheme" content="minimal"> +<style type="text/css"> +<!-- +pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; } +body { font-family: monospace; color: #eeeeee; background-color: #080808; } +* { font-size: 1.05em; } +.muRecipe { color: #ff8700; } +.muData { color: #ffff00; } +.Special { color: #ff6060; } +.muScenario { color: #00af00; } +.Comment { color: #9090ff; } +.Constant { color: #00a0a0; } +.SalientComment { color: #00ffff; } +.Delimiter { color: #a04060; } +.muControl { color: #c0a020; } +--> +</style> + +<script type='text/javascript'> +<!-- + +--> +</script> +</head> +<body> +<pre id='vimCodeElement'> +<span class="SalientComment">## the basic editor data structure, and how it displays text to the screen</span> + +<span class="Comment"># temporary main for this layer: just render the given string at the given</span> +<span class="Comment"># screen dimensions, then stop</span> +<span class="muRecipe">recipe!</span> main [ + <span class="Constant">local-scope</span> + text:address:array:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + open-console + hide-screen <span class="Constant">0/screen</span> + new-editor text, <span class="Constant">0/screen</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> + show-screen <span class="Constant">0/screen</span> + wait-for-event <span class="Constant">0/console</span> + close-console +] + +<span class="muScenario">scenario</span> editor-initially-prints-string-to-screen [ + assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> + run [ + <span class="Constant">1</span>:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc]</span> + new-editor <span class="Constant">1</span>:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> + ] + screen-should-contain [ + <span class="Comment"># top line of screen reserved for menu</span> + <span class="Constant"> . .</span> + <span class="Constant"> .abc .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muData">container</span> editor-data [ + <span class="Comment"># editable text: doubly linked list of characters (head contains a special sentinel)</span> + data:address:duplex-list:character + top-of-screen:address:duplex-list:character + bottom-of-screen:address:duplex-list:character + <span class="Comment"># location before cursor inside data</span> + before-cursor:address:duplex-list:character + + <span class="Comment"># raw bounds of display area on screen</span> + <span class="Comment"># always displays from row 1 (leaving row 0 for a menu) and at most until bottom of screen</span> + left:number + right:number + <span class="Comment"># raw screen coordinates of cursor</span> + cursor-row:number + cursor-column:number +] + +<span class="Comment"># editor:address, screen <- new-editor s:address:array:character, screen:address, left:number, right:number</span> +<span class="Comment"># creates a new editor widget and renders its initial appearance to screen.</span> +<span class="Comment"># top/left/right constrain the screen area available to the new editor.</span> +<span class="Comment"># right is exclusive.</span> +<span class="muRecipe">recipe</span> new-editor [ + <span class="Constant">local-scope</span> + s:address:array:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + <span class="Comment"># no clipping of bounds</span> + left:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + right:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + right<span class="Special"> <- </span>subtract right, <span class="Constant">1</span> + result:address:editor-data<span class="Special"> <- </span>new <span class="Constant">editor-data:type</span> + <span class="Comment"># initialize screen-related fields</span> + x:address:number<span class="Special"> <- </span>get-address *result, <span class="Constant">left:offset</span> + *x<span class="Special"> <- </span>copy left + x<span class="Special"> <- </span>get-address *result, <span class="Constant">right:offset</span> + *x<span class="Special"> <- </span>copy right + <span class="Comment"># initialize cursor</span> + x<span class="Special"> <- </span>get-address *result, <span class="Constant">cursor-row:offset</span> + *x<span class="Special"> <- </span>copy <span class="Constant">1/top</span> + x<span class="Special"> <- </span>get-address *result, <span class="Constant">cursor-column:offset</span> + *x<span class="Special"> <- </span>copy left + init:address:address:duplex-list<span class="Special"> <- </span>get-address *result, <span class="Constant">data:offset</span> + *init<span class="Special"> <- </span>push-duplex <span class="Constant">167/§</span>, <span class="Constant">0/tail</span> + top-of-screen:address:address:duplex-list<span class="Special"> <- </span>get-address *result, <span class="Constant">top-of-screen:offset</span> + *top-of-screen<span class="Special"> <- </span>copy *init + y:address:address:duplex-list<span class="Special"> <- </span>get-address *result, <span class="Constant">before-cursor:offset</span> + *y<span class="Special"> <- </span>copy *init + result<span class="Special"> <- </span>insert-text result, s + <span class="Comment"># initialize cursor to top of screen</span> + y<span class="Special"> <- </span>get-address *result, <span class="Constant">before-cursor:offset</span> + *y<span class="Special"> <- </span>copy *init + <span class="Comment"># initial render to screen, just for some old tests</span> + _, _, screen, result<span class="Special"> <- </span>render screen, result +<span class="Constant"> <editor-initialization></span> + <span class="muControl">reply</span> result +] + +<span class="muRecipe">recipe</span> insert-text [ + <span class="Constant">local-scope</span> + editor:address:editor-data<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + text:address:array:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + <span class="Comment"># early exit if text is empty</span> + <span class="muControl">reply-unless</span> text, editor/same-as-ingredient:<span class="Constant">0</span> + len:number<span class="Special"> <- </span>length *text + <span class="muControl">reply-unless</span> len, editor/same-as-ingredient:<span class="Constant">0</span> + idx:number<span class="Special"> <- </span>copy <span class="Constant">0</span> + <span class="Comment"># now we can start appending the rest, character by character</span> + curr:address:duplex-list<span class="Special"> <- </span>get *editor, <span class="Constant">data:offset</span> + <span class="Delimiter">{</span> + done?:boolean<span class="Special"> <- </span>greater-or-equal idx, len + <span class="muControl">break-if</span> done? + c:character<span class="Special"> <- </span>index *text, idx + insert-duplex c, curr + <span class="Comment"># next iter</span> + curr<span class="Special"> <- </span>next-duplex curr + idx<span class="Special"> <- </span>add idx, <span class="Constant">1</span> + <span class="muControl">loop</span> + <span class="Delimiter">}</span> + <span class="muControl">reply</span> editor/same-as-ingredient:<span class="Constant">0</span> +] + +<span class="muScenario">scenario</span> editor-initializes-without-data [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">3/height</span> + run [ + <span class="Constant">1</span>:address:editor-data<span class="Special"> <- </span>new-editor <span class="Constant">0/data</span>, screen:address, <span class="Constant">2/left</span>, <span class="Constant">5/right</span> + <span class="Constant">2</span>:editor-data<span class="Special"> <- </span>copy *<span class="Constant">1</span>:address:editor-data + ] + memory-should-contain [ + <span class="Comment"># 2 (data) <- just the § sentinel</span> + <span class="Comment"># 3 (top of screen) <- the § sentinel</span> + <span class="Constant">4</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># bottom-of-screen; null since text fits on screen</span> + <span class="Comment"># 5 (before cursor) <- the § sentinel</span> + <span class="Constant">6</span><span class="Special"> <- </span><span class="Constant">2</span> <span class="Comment"># left</span> + <span class="Constant">7</span><span class="Special"> <- </span><span class="Constant">4</span> <span class="Comment"># right (inclusive)</span> + <span class="Constant">8</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># cursor row</span> + <span class="Constant">9</span><span class="Special"> <- </span><span class="Constant">2</span> <span class="Comment"># cursor column</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="Comment"># last-row:number, last-column:number, screen, editor <- render screen:address, editor:address:editor-data</span> +<span class="Comment">#</span> +<span class="Comment"># Assumes cursor should be at coordinates (cursor-row, cursor-column) and</span> +<span class="Comment"># updates before-cursor to match. Might also move coordinates if they're</span> +<span class="Comment"># outside text.</span> +<span class="muRecipe">recipe</span> render [ + <span class="Constant">local-scope</span> + screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + editor:address:editor-data<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + <span class="muControl">reply-unless</span> editor, <span class="Constant">1/top</span>, <span class="Constant">0/left</span>, screen/same-as-ingredient:<span class="Constant">0</span>, editor/same-as-ingredient:<span class="Constant">1</span> + left:number<span class="Special"> <- </span>get *editor, <span class="Constant">left:offset</span> + screen-height:number<span class="Special"> <- </span>screen-height screen + right:number<span class="Special"> <- </span>get *editor, <span class="Constant">right:offset</span> + <span class="Comment"># traversing editor</span> + curr:address:duplex-list<span class="Special"> <- </span>get *editor, <span class="Constant">top-of-screen:offset</span> + prev:address:duplex-list<span class="Special"> <- </span>copy curr <span class="Comment"># just in case curr becomes null and we can't compute prev-duplex</span> + curr<span class="Special"> <- </span>next-duplex curr + <span class="Comment"># traversing screen</span> +<span class="Constant"> +render-loop-initialization</span> + color:number<span class="Special"> <- </span>copy <span class="Constant">7/white</span> + row:number<span class="Special"> <- </span>copy <span class="Constant">1/top</span> + column:number<span class="Special"> <- </span>copy left + cursor-row:address:number<span class="Special"> <- </span>get-address *editor, <span class="Constant">cursor-row:offset</span> + cursor-column:address:number<span class="Special"> <- </span>get-address *editor, <span class="Constant">cursor-column:offset</span> + before-cursor:address:address:duplex-list<span class="Special"> <- </span>get-address *editor, <span class="Constant">before-cursor:offset</span> + screen<span class="Special"> <- </span>move-cursor screen, row, column + <span class="Delimiter">{</span> +<span class="Constant"> +next-character</span> + <span class="muControl">break-unless</span> curr + off-screen?:boolean<span class="Special"> <- </span>greater-or-equal row, screen-height + <span class="muControl">break-if</span> off-screen? + <span class="Comment"># update editor-data.before-cursor</span> + <span class="Comment"># Doing so at the start of each iteration ensures it stays one step behind</span> + <span class="Comment"># the current character.</span> + <span class="Delimiter">{</span> + at-cursor-row?:boolean<span class="Special"> <- </span>equal row, *cursor-row + <span class="muControl">break-unless</span> at-cursor-row? + at-cursor?:boolean<span class="Special"> <- </span>equal column, *cursor-column + <span class="muControl">break-unless</span> at-cursor? + *before-cursor<span class="Special"> <- </span>copy prev + <span class="Delimiter">}</span> + c:character<span class="Special"> <- </span>get *curr, <span class="Constant">value:offset</span> +<span class="Constant"> <character-c-received></span> + <span class="Delimiter">{</span> + <span class="Comment"># newline? move to left rather than 0</span> + newline?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">10/newline</span> + <span class="muControl">break-unless</span> newline? + <span class="Comment"># adjust cursor if necessary</span> + <span class="Delimiter">{</span> + at-cursor-row?:boolean<span class="Special"> <- </span>equal row, *cursor-row + <span class="muControl">break-unless</span> at-cursor-row? + left-of-cursor?:boolean<span class="Special"> <- </span>lesser-than column, *cursor-column + <span class="muControl">break-unless</span> left-of-cursor? + *cursor-column<span class="Special"> <- </span>copy column + *before-cursor<span class="Special"> <- </span>prev-duplex curr + <span class="Delimiter">}</span> + <span class="Comment"># clear rest of line in this window</span> + clear-line-delimited screen, column, right + <span class="Comment"># skip to next line</span> + row<span class="Special"> <- </span>add row, <span class="Constant">1</span> + column<span class="Special"> <- </span>copy left + screen<span class="Special"> <- </span>move-cursor screen, row, column + curr<span class="Special"> <- </span>next-duplex curr + prev<span class="Special"> <- </span>next-duplex prev + <span class="muControl">loop</span> <span class="Constant">+next-character:label</span> + <span class="Delimiter">}</span> + <span class="Delimiter">{</span> + <span class="Comment"># at right? wrap. even if there's only one more letter left; we need</span> + <span class="Comment"># room for clicking on the cursor after it.</span> + at-right?:boolean<span class="Special"> <- </span>equal column, right + <span class="muControl">break-unless</span> at-right? + <span class="Comment"># print wrap icon</span> + print-character screen, <span class="Constant">8617/loop-back-to-left</span>, <span class="Constant">245/grey</span> + column<span class="Special"> <- </span>copy left + row<span class="Special"> <- </span>add row, <span class="Constant">1</span> + screen<span class="Special"> <- </span>move-cursor screen, row, column + <span class="Comment"># don't increment curr</span> + <span class="muControl">loop</span> <span class="Constant">+next-character:label</span> + <span class="Delimiter">}</span> + print-character screen, c, color + curr<span class="Special"> <- </span>next-duplex curr + prev<span class="Special"> <- </span>next-duplex prev + column<span class="Special"> <- </span>add column, <span class="Constant">1</span> + <span class="muControl">loop</span> + <span class="Delimiter">}</span> + <span class="Comment"># save first character off-screen</span> + bottom-of-screen:address:address:duplex-list<span class="Special"> <- </span>get-address *editor, <span class="Constant">bottom-of-screen:offset</span> + *bottom-of-screen<span class="Special"> <- </span>copy curr + <span class="Comment"># is cursor to the right of the last line? move to end</span> + <span class="Delimiter">{</span> + at-cursor-row?:boolean<span class="Special"> <- </span>equal row, *cursor-row + cursor-outside-line?:boolean<span class="Special"> <- </span>lesser-or-equal column, *cursor-column + before-cursor-on-same-line?:boolean<span class="Special"> <- </span>and at-cursor-row?, cursor-outside-line? + above-cursor-row?:boolean<span class="Special"> <- </span>lesser-than row, *cursor-row + before-cursor?:boolean<span class="Special"> <- </span>or before-cursor-on-same-line?, above-cursor-row? + <span class="muControl">break-unless</span> before-cursor? + *cursor-row<span class="Special"> <- </span>copy row + *cursor-column<span class="Special"> <- </span>copy column + *before-cursor<span class="Special"> <- </span>copy prev + <span class="Delimiter">}</span> + <span class="muControl">reply</span> row, column, screen/same-as-ingredient:<span class="Constant">0</span>, editor/same-as-ingredient:<span class="Constant">1</span> +] + +<span class="muRecipe">recipe</span> clear-line-delimited [ + <span class="Constant">local-scope</span> + screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + column:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + right:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + <span class="Delimiter">{</span> + done?:boolean<span class="Special"> <- </span>greater-than column, right + <span class="muControl">break-if</span> done? + print-character screen, <span class="Constant">32/space</span> + column<span class="Special"> <- </span>add column, <span class="Constant">1</span> + <span class="muControl">loop</span> + <span class="Delimiter">}</span> +] + +<span class="muRecipe">recipe</span> clear-screen-from [ + <span class="Constant">local-scope</span> + screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + row:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + column:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + left:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + right:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + <span class="Comment"># if it's the real screen, use the optimized primitive</span> + <span class="Delimiter">{</span> + <span class="muControl">break-if</span> screen + clear-display-from row, column, left, right + <span class="muControl">reply</span> screen/same-as-ingredient:<span class="Constant">0</span> + <span class="Delimiter">}</span> + <span class="Comment"># if not, go the slower route</span> + screen<span class="Special"> <- </span>move-cursor screen, row, column + clear-line-delimited screen, column, right + clear-rest-of-screen screen, row, left, right + <span class="muControl">reply</span> screen/same-as-ingredient:<span class="Constant">0</span> +] + +<span class="muRecipe">recipe</span> clear-rest-of-screen [ + <span class="Constant">local-scope</span> + screen:address<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + row:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + left:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + right:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + row<span class="Special"> <- </span>add row, <span class="Constant">1</span> + screen<span class="Special"> <- </span>move-cursor screen, row, left + screen-height:number<span class="Special"> <- </span>screen-height screen + <span class="Delimiter">{</span> + at-bottom-of-screen?:boolean<span class="Special"> <- </span>greater-or-equal row, screen-height + <span class="muControl">break-if</span> at-bottom-of-screen? + screen<span class="Special"> <- </span>move-cursor screen, row, left + clear-line-delimited screen, left, right + row<span class="Special"> <- </span>add row, <span class="Constant">1</span> + <span class="muControl">loop</span> + <span class="Delimiter">}</span> +] + +<span class="muScenario">scenario</span> editor-initially-prints-multiple-lines [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc</span> +<span class="Constant">def]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> .abc .</span> + <span class="Constant"> .def .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muScenario">scenario</span> editor-initially-handles-offsets [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">1/left</span>, <span class="Constant">5/right</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> . abc .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muScenario">scenario</span> editor-initially-prints-multiple-lines-at-offset [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc</span> +<span class="Constant">def]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">1/left</span>, <span class="Constant">5/right</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> . abc .</span> + <span class="Constant"> . def .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muScenario">scenario</span> editor-initially-wraps-long-lines [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc def]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> .abc ↩.</span> + <span class="Constant"> .def .</span> + <span class="Constant"> . .</span> + ] + screen-should-contain-in-color <span class="Constant">245/grey</span> [ + <span class="Constant"> . .</span> + <span class="Constant"> . ↩.</span> + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muScenario">scenario</span> editor-initially-wraps-barely-long-lines [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abcde]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> + ] + <span class="Comment"># still wrap, even though the line would fit. We need room to click on the</span> + <span class="Comment"># end of the line</span> + screen-should-contain [ + <span class="Constant"> . .</span> +<span class="Constant"> .abcd↩.</span> + <span class="Constant"> .e .</span> + <span class="Constant"> . .</span> + ] + screen-should-contain-in-color <span class="Constant">245/grey</span> [ + <span class="Constant"> . .</span> + <span class="Constant"> . ↩.</span> + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muScenario">scenario</span> editor-initializes-empty-text [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + <span class="Constant">1</span>:address:array:character<span class="Special"> <- </span>new <span class="Constant">[]</span> + <span class="Constant">2</span>:address:editor-data<span class="Special"> <- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> + <span class="Constant">3</span>:number<span class="Special"> <- </span>get *<span class="Constant">2</span>:address:editor-data, <span class="Constant">cursor-row:offset</span> + <span class="Constant">4</span>:number<span class="Special"> <- </span>get *<span class="Constant">2</span>:address:editor-data, <span class="Constant">cursor-column:offset</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + ] + memory-should-contain [ + <span class="Constant">3</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># cursor row</span> + <span class="Constant">4</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># cursor column</span> + ] +] + +<span class="Comment"># just a little color for mu code</span> + +<span class="muScenario">scenario</span> render-colors-comments [ + assume-screen <span class="Constant">5/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc</span> +<span class="Constant"># de</span> +<span class="Constant">f]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> .abc .</span> + <span class="Constant"> .# de .</span> + <span class="Constant"> .f .</span> + <span class="Constant"> . .</span> + ] + screen-should-contain-in-color <span class="Constant">12/lightblue</span>, [ + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + <span class="Constant"> .# de .</span> + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + ] + screen-should-contain-in-color <span class="Constant">7/white</span>, [ + <span class="Constant"> . .</span> + <span class="Constant"> .abc .</span> + <span class="Constant"> . .</span> + <span class="Constant"> .f .</span> + <span class="Constant"> . .</span> + ] +] + +<span class="muRecipe">after</span> <span class="Constant"><character-c-received></span> [ + color<span class="Special"> <- </span>get-color color, c +] + +<span class="Comment"># color <- get-color color:number, c:character</span> +<span class="Comment"># so far the previous color is all the information we need; that may change</span> +<span class="muRecipe">recipe</span> get-color [ + <span class="Constant">local-scope</span> + color:number<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + c:character<span class="Special"> <- </span><span class="Constant">next-ingredient</span> + color-is-white?:boolean<span class="Special"> <- </span>equal color, <span class="Constant">7/white</span> + <span class="Comment"># if color is white and next character is '#', switch color to blue</span> + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> color-is-white? + starting-comment?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">35/#</span> + <span class="muControl">break-unless</span> starting-comment? + trace <span class="Constant">90</span>, <span class="Constant">[app]</span>, <span class="Constant">[switch color back to blue]</span> + color<span class="Special"> <- </span>copy <span class="Constant">12/lightblue</span> + <span class="muControl">jump</span> <span class="Constant">+exit:label</span> + <span class="Delimiter">}</span> + <span class="Comment"># if color is blue and next character is newline, switch color to white</span> + <span class="Delimiter">{</span> + color-is-blue?:boolean<span class="Special"> <- </span>equal color, <span class="Constant">12/lightblue</span> + <span class="muControl">break-unless</span> color-is-blue? + ending-comment?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">10/newline</span> + <span class="muControl">break-unless</span> ending-comment? + trace <span class="Constant">90</span>, <span class="Constant">[app]</span>, <span class="Constant">[switch color back to white]</span> + color<span class="Special"> <- </span>copy <span class="Constant">7/white</span> + <span class="muControl">jump</span> <span class="Constant">+exit:label</span> + <span class="Delimiter">}</span> + <span class="Comment"># if color is white (no comments) and next character is '<', switch color to red</span> + <span class="Delimiter">{</span> + <span class="muControl">break-unless</span> color-is-white? + starting-assignment?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">60/<</span> + <span class="muControl">break-unless</span> starting-assignment? + color<span class="Special"> <- </span>copy <span class="Constant">1/red</span> + <span class="muControl">jump</span> <span class="Constant">+exit:label</span> + <span class="Delimiter">}</span> + <span class="Comment"># if color is red and next character is space, switch color to white</span> + <span class="Delimiter">{</span> + color-is-red?:boolean<span class="Special"> <- </span>equal color, <span class="Constant">1/red</span> + <span class="muControl">break-unless</span> color-is-red? + ending-assignment?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">32/space</span> + <span class="muControl">break-unless</span> ending-assignment? + color<span class="Special"> <- </span>copy <span class="Constant">7/white</span> + <span class="muControl">jump</span> <span class="Constant">+exit:label</span> + <span class="Delimiter">}</span> + <span class="Comment"># otherwise no change</span> +<span class="Constant"> +exit</span> + <span class="muControl">reply</span> color +] + +<span class="muScenario">scenario</span> render-colors-assignment [ + assume-screen <span class="Constant">8/width</span>, <span class="Constant">5/height</span> + run [ + s:address:array:character<span class="Special"> <- </span>new <span class="Constant">[abc</span> +<span class="Constant">d <- e</span> +<span class="Constant">f]</span> + new-editor s:address:array:character, screen:address, <span class="Constant">0/left</span>, <span class="Constant">8/right</span> + ] + screen-should-contain [ + <span class="Constant"> . .</span> + <span class="Constant"> .abc .</span> + <span class="Constant"> .d <- e .</span> + <span class="Constant"> .f .</span> + <span class="Constant"> . .</span> + ] + screen-should-contain-in-color <span class="Constant">1/red</span>, [ + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + <span class="Constant"> . <- .</span> + <span class="Constant"> . .</span> + <span class="Constant"> . .</span> + ] +] +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> |