diff options
| author | Kartik Agaram <vc@akkartik.com> | 2018-07-27 17:07:52 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2018-07-27 17:08:29 -0700 |
| commit | 5fe060d582d4a82444243a28b18085c971a85628 (patch) | |
| tree | 7a13eb020d0a9cab5d4195da931a373f575229ab /html/edit/003-shortcuts.mu.html | |
| parent | 013d95266d563a3f531c13eba6d2a6bfe18f8808 (diff) | |
| download | mu-5fe060d582d4a82444243a28b18085c971a85628.tar.gz | |
4447
Diffstat (limited to 'html/edit/003-shortcuts.mu.html')
| -rw-r--r-- | html/edit/003-shortcuts.mu.html | 3291 |
1 files changed, 1652 insertions, 1639 deletions
diff --git a/html/edit/003-shortcuts.mu.html b/html/edit/003-shortcuts.mu.html index 9d7cd6d1..e507b83d 100644 --- a/html/edit/003-shortcuts.mu.html +++ b/html/edit/003-shortcuts.mu.html @@ -15,16 +15,16 @@ body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color a { color:#eeeeee; text-decoration: none; } a:hover { text-decoration: underline; } * { font-size: 12pt; font-size: 1em; } +.Delimiter { color: #800080; } .muRecipe { color: #ff8700; } -.muScenario { color: #00af00; } .Special { color: #c00000; } -.Delimiter { color: #800080; } .SalientComment { color: #00ffff; } .Constant { color: #00a0a0; } .LineNr { color: #444444; } +.muControl { color: #c0a020; } .Comment { color: #9090ff; } .Comment a { color:#0000ee; text-decoration:underline; } -.muControl { color: #c0a020; } +.muScenario { color: #00af00; } --> </style> @@ -173,31 +173,31 @@ if ('onhashchange' in window) { <span id="L112" class="LineNr"> 112 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> <span id="L113" class="LineNr"> 113 </span> data:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> <span id="L114" class="LineNr"> 114 </span> <span class="Comment"># if at start of text (before-cursor at § sentinel), return</span> -<span id="L115" class="LineNr"> 115 </span> <a href='../065duplex_list.mu.html#L32'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> before-cursor -<span id="L116" class="LineNr"> 116 </span> <span class="muControl">return-unless</span> <a href='../065duplex_list.mu.html#L32'>prev</a>, <span class="Constant">0/no-more-render</span>, <span class="Constant">0/nothing-deleted</span> +<span id="L115" class="LineNr"> 115 </span> <a href='../065duplex_list.mu.html#L38'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> before-cursor +<span id="L116" class="LineNr"> 116 </span> <span class="muControl">return-unless</span> <a href='../065duplex_list.mu.html#L38'>prev</a>,<span class="Constant"> false/no-more-render, null/nothing-deleted</span> <span id="L117" class="LineNr"> 117 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[delete-before-cursor]</span> <span id="L118" class="LineNr"> 118 </span> original-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> <span id="L119" class="LineNr"> 119 </span> scroll?:bool <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L156'>move-cursor-coordinates-left</a> editor <span id="L120" class="LineNr"> 120 </span> backspaced-cell:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy before-cursor <span id="L121" class="LineNr"> 121 </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> -<span id="L122" class="LineNr"> 122 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L32'>prev</a> +<span id="L122" class="LineNr"> 122 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L38'>prev</a> <span id="L123" class="LineNr"> 123 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor -<span id="L124" class="LineNr"> 124 </span> <span class="muControl">return-if</span> scroll?, <span class="Constant">1/go-render</span> +<span id="L124" class="LineNr"> 124 </span> <span class="muControl">return-if</span> scroll?,<span class="Constant"> true/go-render</span> <span id="L125" class="LineNr"> 125 </span> <a href='../081print.mu.html#L768'>screen-width</a>:num <span class="Special"><-</span> <a href='../081print.mu.html#L768'>screen-width</a> <a href='../081print.mu.html#L16'>screen</a> <span id="L126" class="LineNr"> 126 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> <span id="L127" class="LineNr"> 127 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> <span id="L128" class="LineNr"> 128 </span> <span class="Comment"># did we just backspace over a newline?</span> <span id="L129" class="LineNr"> 129 </span> same-row?:bool <span class="Special"><-</span> equal cursor-row, original-row -<span id="L130" class="LineNr"> 130 </span> <span class="muControl">return-unless</span> same-row?, <span class="Constant">1/go-render</span> +<span id="L130" class="LineNr"> 130 </span> <span class="muControl">return-unless</span> same-row?,<span class="Constant"> true/go-render</span> <span id="L131" class="LineNr"> 131 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> <span id="L132" class="LineNr"> 132 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> -<span id="L133" class="LineNr"> 133 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor +<span id="L133" class="LineNr"> 133 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor <span id="L134" class="LineNr"> 134 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, cursor-row, cursor-column <span id="L135" class="LineNr"> 135 </span> curr-column:num <span class="Special"><-</span> copy cursor-column <span id="L136" class="LineNr"> 136 </span> <span class="Delimiter">{</span> <span id="L137" class="LineNr"> 137 </span> <span class="Comment"># hit right margin? give up and let caller render</span> <span id="L138" class="LineNr"> 138 </span> at-right?:bool <span class="Special"><-</span> greater-or-equal curr-column, right -<span id="L139" class="LineNr"> 139 </span> <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span> +<span id="L139" class="LineNr"> 139 </span> <span class="muControl">return-if</span> at-right?,<span class="Constant"> true/go-render</span> <span id="L140" class="LineNr"> 140 </span> <span class="muControl">break-unless</span> curr <span id="L141" class="LineNr"> 141 </span> <span class="Comment"># newline? done.</span> <span id="L142" class="LineNr"> 142 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> @@ -205,19 +205,19 @@ if ('onhashchange' in window) { <span id="L144" class="LineNr"> 144 </span> <span class="muControl">break-if</span> at-newline? <span id="L145" class="LineNr"> 145 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='../081print.mu.html#L16'>screen</a>, currc <span id="L146" class="LineNr"> 146 </span> curr-column <span class="Special"><-</span> add curr-column,<span class="Constant"> 1</span> -<span id="L147" class="LineNr"> 147 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> curr +<span id="L147" class="LineNr"> 147 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> curr <span id="L148" class="LineNr"> 148 </span> <span class="muControl"> loop</span> <span id="L149" class="LineNr"> 149 </span> <span class="Delimiter">}</span> <span id="L150" class="LineNr"> 150 </span> <span class="Comment"># we're guaranteed not to be at the right margin</span> <span id="L151" class="LineNr"> 151 </span> space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span> <span id="L152" class="LineNr"> 152 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='../081print.mu.html#L16'>screen</a>, space -<span id="L153" class="LineNr"> 153 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<span id="L153" class="LineNr"> 153 </span> go-render? <span class="Special"><-</span> copy<span class="Constant"> false</span> <span id="L154" class="LineNr"> 154 </span>] <span id="L155" class="LineNr"> 155 </span> <span id="L156" class="LineNr"> 156 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L156'>move-cursor-coordinates-left</a> editor:&:editor<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ <span id="L157" class="LineNr"> 157 </span> <span class="Constant">local-scope</span> <span id="L158" class="LineNr"> 158 </span> <span class="Constant">load-inputs</span> -<span id="L159" class="LineNr"> 159 </span> go-render?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<span id="L159" class="LineNr"> 159 </span> go-render?:bool <span class="Special"><-</span> copy<span class="Constant"> false</span> <span id="L160" class="LineNr"> 160 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> <span id="L161" class="LineNr"> 161 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> <span id="L162" class="LineNr"> 162 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> @@ -241,7 +241,7 @@ if ('onhashchange' in window) { <span id="L180" class="LineNr"> 180 </span> <span class="Delimiter">{</span> <span id="L181" class="LineNr"> 181 </span> <span class="muControl">break-unless</span> top-of-screen? <span id="L182" class="LineNr"> 182 </span><span class="Constant"> <scroll-up></span> -<span id="L183" class="LineNr"> 183 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">1/true</span> +<span id="L183" class="LineNr"> 183 </span> go-render? <span class="Special"><-</span> copy<span class="Constant"> true</span> <span id="L184" class="LineNr"> 184 </span> <span class="Delimiter">}</span> <span id="L185" class="LineNr"> 185 </span> <span class="Delimiter">{</span> <span id="L186" class="LineNr"> 186 </span> <span class="Comment"># case 1: if previous character was newline, figure out how long the previous line is</span> @@ -285,7 +285,7 @@ if ('onhashchange' in window) { <span id="L224" class="LineNr"> 224 </span> at-start?:bool <span class="Special"><-</span> equal curr, start <span id="L225" class="LineNr"> 225 </span> <span class="muControl">return-if</span> at-start? <span id="L226" class="LineNr"> 226 </span> <span class="Delimiter">{</span> -<span id="L227" class="LineNr"> 227 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> curr +<span id="L227" class="LineNr"> 227 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> curr <span id="L228" class="LineNr"> 228 </span> <span class="muControl">break-unless</span> curr <span id="L229" class="LineNr"> 229 </span> at-start?:bool <span class="Special"><-</span> equal curr, start <span id="L230" class="LineNr"> 230 </span> <span class="muControl">break-if</span> at-start? @@ -436,14 +436,14 @@ if ('onhashchange' in window) { <span id="L375" class="LineNr"> 375 </span> <span class="Constant">load-inputs</span> <span id="L376" class="LineNr"> 376 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> <span id="L377" class="LineNr"> 377 </span> data:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> -<span id="L378" class="LineNr"> 378 </span> deleted-cell:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor -<span id="L379" class="LineNr"> 379 </span> <span class="muControl">return-unless</span> deleted-cell, <span class="Constant">0/don't-render</span> +<span id="L378" class="LineNr"> 378 </span> deleted-cell:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor +<span id="L379" class="LineNr"> 379 </span> <span class="muControl">return-unless</span> deleted-cell,<span class="Constant"> false/don't-render</span> <span id="L380" class="LineNr"> 380 </span> currc:char <span class="Special"><-</span> get *deleted-cell, <span class="Constant">value:offset</span> <span id="L381" class="LineNr"> 381 </span> data <span class="Special"><-</span> remove deleted-cell, data <span id="L382" class="LineNr"> 382 </span> deleted-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> -<span id="L383" class="LineNr"> 383 </span> <span class="muControl">return-if</span> deleted-newline?, <span class="Constant">1/go-render</span> +<span id="L383" class="LineNr"> 383 </span> <span class="muControl">return-if</span> deleted-newline?,<span class="Constant"> true/go-render</span> <span id="L384" class="LineNr"> 384 </span> <span class="Comment"># wasn't a newline? render rest of line</span> -<span id="L385" class="LineNr"> 385 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor <span class="Comment"># refresh after remove above</span> +<span id="L385" class="LineNr"> 385 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor <span class="Comment"># refresh after remove above</span> <span id="L386" class="LineNr"> 386 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> <span id="L387" class="LineNr"> 387 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> <span id="L388" class="LineNr"> 388 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, cursor-row, cursor-column @@ -452,20 +452,20 @@ if ('onhashchange' in window) { <span id="L391" class="LineNr"> 391 </span> <span class="Delimiter">{</span> <span id="L392" class="LineNr"> 392 </span> <span class="Comment"># hit right margin? give up and let caller render</span> <span id="L393" class="LineNr"> 393 </span> at-right?:bool <span class="Special"><-</span> greater-or-equal curr-column, <a href='../081print.mu.html#L768'>screen-width</a> -<span id="L394" class="LineNr"> 394 </span> <span class="muControl">return-if</span> at-right?, <span class="Constant">1/go-render</span> +<span id="L394" class="LineNr"> 394 </span> <span class="muControl">return-if</span> at-right?,<span class="Constant"> true/go-render</span> <span id="L395" class="LineNr"> 395 </span> <span class="muControl">break-unless</span> curr <span id="L396" class="LineNr"> 396 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> <span id="L397" class="LineNr"> 397 </span> at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> <span id="L398" class="LineNr"> 398 </span> <span class="muControl">break-if</span> at-newline? <span id="L399" class="LineNr"> 399 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='../081print.mu.html#L16'>screen</a>, currc <span id="L400" class="LineNr"> 400 </span> curr-column <span class="Special"><-</span> add curr-column,<span class="Constant"> 1</span> -<span id="L401" class="LineNr"> 401 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> curr +<span id="L401" class="LineNr"> 401 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> curr <span id="L402" class="LineNr"> 402 </span> <span class="muControl"> loop</span> <span id="L403" class="LineNr"> 403 </span> <span class="Delimiter">}</span> <span id="L404" class="LineNr"> 404 </span> <span class="Comment"># we're guaranteed not to be at the right margin</span> <span id="L405" class="LineNr"> 405 </span> space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span> <span id="L406" class="LineNr"> 406 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='../081print.mu.html#L16'>screen</a>, space -<span id="L407" class="LineNr"> 407 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<span id="L407" class="LineNr"> 407 </span> go-render? <span class="Special"><-</span> copy<span class="Constant"> false</span> <span id="L408" class="LineNr"> 408 </span>] <span id="L409" class="LineNr"> 409 </span> <span id="L410" class="LineNr"> 410 </span><span class="Comment"># right arrow</span> @@ -497,7 +497,7 @@ if ('onhashchange' in window) { <span id="L436" class="LineNr"> 436 </span> move-to-next-character?:bool <span class="Special"><-</span> equal k, <span class="Constant">65514/right-arrow</span> <span id="L437" class="LineNr"> 437 </span> <span class="muControl">break-unless</span> move-to-next-character? <span id="L438" class="LineNr"> 438 </span> <span class="Comment"># if not at end of text</span> -<span id="L439" class="LineNr"> 439 </span> next-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor +<span id="L439" class="LineNr"> 439 </span> next-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor <span id="L440" class="LineNr"> 440 </span> <span class="muControl">break-unless</span> next-cursor <span id="L441" class="LineNr"> 441 </span> <span class="Comment"># scan to next character</span> <span id="L442" class="LineNr"> 442 </span><span class="Constant"> <begin-move-cursor></span> @@ -529,11 +529,11 @@ if ('onhashchange' in window) { <span id="L468" class="LineNr"> 468 </span> cursor-column <span class="Special"><-</span> copy left <span id="L469" class="LineNr"> 469 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column <span id="L470" class="LineNr"> 470 </span> below-screen?:bool <span class="Special"><-</span> greater-or-equal cursor-row, <a href='../081print.mu.html#L782'>screen-height</a> <span class="Comment"># must be equal</span> -<span id="L471" class="LineNr"> 471 </span> <span class="muControl">return-unless</span> below-screen?, <span class="Constant">0/don't-render</span> +<span id="L471" class="LineNr"> 471 </span> <span class="muControl">return-unless</span> below-screen?,<span class="Constant"> false/don't-render</span> <span id="L472" class="LineNr"> 472 </span><span class="Constant"> <scroll-down></span> <span id="L473" class="LineNr"> 473 </span> cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> <span class="Comment"># bring back into screen range</span> <span id="L474" class="LineNr"> 474 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row -<span id="L475" class="LineNr"> 475 </span> <span class="muControl"> return</span> <span class="Constant">1/go-render</span> +<span id="L475" class="LineNr"> 475 </span> <span class="muControl"> return</span><span class="Constant"> true/go-render</span> <span id="L476" class="LineNr"> 476 </span> <span class="Delimiter">}</span> <span id="L477" class="LineNr"> 477 </span> <span class="Comment"># if the line wraps, move cursor to start of next row</span> <span id="L478" class="LineNr"> 478 </span> <span class="Delimiter">{</span> @@ -542,8 +542,8 @@ if ('onhashchange' in window) { <span id="L481" class="LineNr"> 481 </span> at-wrap?:bool <span class="Special"><-</span> equal cursor-column, wrap-column <span id="L482" class="LineNr"> 482 </span> <span class="muControl">break-unless</span> at-wrap? <span id="L483" class="LineNr"> 483 </span> <span class="Comment"># and if next character isn't newline</span> -<span id="L484" class="LineNr"> 484 </span> <a href='../065duplex_list.mu.html#L25'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor -<span id="L485" class="LineNr"> 485 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L484" class="LineNr"> 484 </span> <a href='../065duplex_list.mu.html#L31'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor +<span id="L485" class="LineNr"> 485 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L486" class="LineNr"> 486 </span> next-character:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> <span id="L487" class="LineNr"> 487 </span> newline?:bool <span class="Special"><-</span> equal next-character, <span class="Constant">10/newline</span> <span id="L488" class="LineNr"> 488 </span> <span class="muControl">break-if</span> newline? @@ -552,16 +552,16 @@ if ('onhashchange' in window) { <span id="L491" class="LineNr"> 491 </span> cursor-column <span class="Special"><-</span> copy left <span id="L492" class="LineNr"> 492 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column <span id="L493" class="LineNr"> 493 </span> below-screen?:bool <span class="Special"><-</span> greater-or-equal cursor-row, <a href='../081print.mu.html#L782'>screen-height</a> <span class="Comment"># must be equal</span> -<span id="L494" class="LineNr"> 494 </span> <span class="muControl">return-unless</span> below-screen?, <span class="Constant">0/no-more-render</span> +<span id="L494" class="LineNr"> 494 </span> <span class="muControl">return-unless</span> below-screen?,<span class="Constant"> false/no-more-render</span> <span id="L495" class="LineNr"> 495 </span><span class="Constant"> <scroll-down></span> <span id="L496" class="LineNr"> 496 </span> cursor-row <span class="Special"><-</span> subtract cursor-row,<span class="Constant"> 1</span> <span class="Comment"># bring back into screen range</span> <span id="L497" class="LineNr"> 497 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row -<span id="L498" class="LineNr"> 498 </span> <span class="muControl"> return</span> <span class="Constant">1/go-render</span> +<span id="L498" class="LineNr"> 498 </span> <span class="muControl"> return</span><span class="Constant"> true/go-render</span> <span id="L499" class="LineNr"> 499 </span> <span class="Delimiter">}</span> <span id="L500" class="LineNr"> 500 </span> <span class="Comment"># otherwise move cursor one character right</span> <span id="L501" class="LineNr"> 501 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> <span id="L502" class="LineNr"> 502 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column -<span id="L503" class="LineNr"> 503 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<span id="L503" class="LineNr"> 503 </span> go-render? <span class="Special"><-</span> copy<span class="Constant"> false</span> <span id="L504" class="LineNr"> 504 </span>] <span id="L505" class="LineNr"> 505 </span> <span id="L506" class="LineNr"> 506 </span><span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow [ @@ -782,11 +782,11 @@ if ('onhashchange' in window) { <span id="L721" class="LineNr"> 721 </span> <span class="muControl">break-unless</span> move-to-previous-character? <span id="L722" class="LineNr"> 722 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[left arrow]</span> <span id="L723" class="LineNr"> 723 </span> <span class="Comment"># if not at start of text (before-cursor at § sentinel)</span> -<span id="L724" class="LineNr"> 724 </span> <a href='../065duplex_list.mu.html#L32'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> before-cursor -<span id="L725" class="LineNr"> 725 </span> <span class="muControl">return-unless</span> <a href='../065duplex_list.mu.html#L32'>prev</a>, <span class="Constant">0/don't-render</span> +<span id="L724" class="LineNr"> 724 </span> <a href='../065duplex_list.mu.html#L38'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> before-cursor +<span id="L725" class="LineNr"> 725 </span> <span class="muControl">return-unless</span> <a href='../065duplex_list.mu.html#L38'>prev</a>,<span class="Constant"> false/don't-render</span> <span id="L726" class="LineNr"> 726 </span><span class="Constant"> <begin-move-cursor></span> <span id="L727" class="LineNr"> 727 </span> go-render? <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L156'>move-cursor-coordinates-left</a> editor -<span id="L728" class="LineNr"> 728 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L32'>prev</a> +<span id="L728" class="LineNr"> 728 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L38'>prev</a> <span id="L729" class="LineNr"> 729 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor <span id="L730" class="LineNr"> 730 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">1/left-arrow</span> <span id="L731" class="LineNr"> 731 </span><span class="Constant"> <end-move-cursor></span> @@ -1061,7 +1061,7 @@ if ('onhashchange' in window) { <span id="L1000" class="LineNr">1000 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L1000'>move-to-previous-line</a> editor:&:editor<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ <span id="L1001" class="LineNr">1001 </span> <span class="Constant">local-scope</span> <span id="L1002" class="LineNr">1002 </span> <span class="Constant">load-inputs</span> -<span id="L1003" class="LineNr">1003 </span> go-render?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<span id="L1003" class="LineNr">1003 </span> go-render?:bool <span class="Special"><-</span> copy<span class="Constant"> false</span> <span id="L1004" class="LineNr">1004 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> <span id="L1005" class="LineNr">1005 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> <span id="L1006" class="LineNr">1006 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> @@ -1099,7 +1099,7 @@ if ('onhashchange' in window) { <span id="L1038" class="LineNr">1038 </span> <span class="Delimiter">{</span> <span id="L1039" class="LineNr">1039 </span> done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, target-column <span id="L1040" class="LineNr">1040 </span> <span class="muControl">break-if</span> done? -<span id="L1041" class="LineNr">1041 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor +<span id="L1041" class="LineNr">1041 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor <span id="L1042" class="LineNr">1042 </span> <span class="muControl">break-unless</span> curr <span id="L1043" class="LineNr">1043 </span> currc:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> <span id="L1044" class="LineNr">1044 </span> at-newline?:bool <span class="Special"><-</span> equal currc, <span class="Constant">10/newline</span> @@ -1117,7 +1117,7 @@ if ('onhashchange' in window) { <span id="L1056" class="LineNr">1056 </span> <span class="Comment"># if cursor already at top, scroll up</span> <span id="L1057" class="LineNr">1057 </span> <span class="muControl">break-unless</span> already-at-top? <span id="L1058" class="LineNr">1058 </span><span class="Constant"> <scroll-up></span> -<span id="L1059" class="LineNr">1059 </span> <span class="muControl"> return</span> <span class="Constant">1/go-render</span> +<span id="L1059" class="LineNr">1059 </span> <span class="muControl"> return</span><span class="Constant"> true/go-render</span> <span id="L1060" class="LineNr">1060 </span> <span class="Delimiter">}</span> <span id="L1061" class="LineNr">1061 </span>] <span id="L1062" class="LineNr">1062 </span> @@ -1141,9 +1141,9 @@ if ('onhashchange' in window) { <span id="L1080" class="LineNr">1080 </span> <span class="Delimiter">{</span> <span id="L1081" class="LineNr">1081 </span> <span class="muControl">break-if</span> len <span id="L1082" class="LineNr">1082 </span> <span class="Comment"># empty line; just skip this newline</span> -<span id="L1083" class="LineNr">1083 </span> <a href='../065duplex_list.mu.html#L32'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> curr -<span id="L1084" class="LineNr">1084 </span> <span class="muControl">return-unless</span> <a href='../065duplex_list.mu.html#L32'>prev</a>, curr -<span id="L1085" class="LineNr">1085 </span> <span class="muControl"> return</span> <a href='../065duplex_list.mu.html#L32'>prev</a> +<span id="L1083" class="LineNr">1083 </span> <a href='../065duplex_list.mu.html#L38'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> curr +<span id="L1084" class="LineNr">1084 </span> <span class="muControl">return-unless</span> <a href='../065duplex_list.mu.html#L38'>prev</a>, curr +<span id="L1085" class="LineNr">1085 </span> <span class="muControl"> return</span> <a href='../065duplex_list.mu.html#L38'>prev</a> <span id="L1086" class="LineNr">1086 </span> <span class="Delimiter">}</span> <span id="L1087" class="LineNr">1087 </span> _, max:num <span class="Special"><-</span> divide-with-remainder len, max-line-length <span id="L1088" class="LineNr">1088 </span> <span class="Comment"># remainder 0 => scan one width-worth</span> @@ -1157,9 +1157,9 @@ if ('onhashchange' in window) { <span id="L1096" class="LineNr">1096 </span> <span class="Delimiter">{</span> <span id="L1097" class="LineNr">1097 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max <span id="L1098" class="LineNr">1098 </span> <span class="muControl">break-if</span> done? -<span id="L1099" class="LineNr">1099 </span> <a href='../065duplex_list.mu.html#L32'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> curr -<span id="L1100" class="LineNr">1100 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L32'>prev</a> -<span id="L1101" class="LineNr">1101 </span> curr <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L32'>prev</a> +<span id="L1099" class="LineNr">1099 </span> <a href='../065duplex_list.mu.html#L38'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> curr +<span id="L1100" class="LineNr">1100 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L38'>prev</a> +<span id="L1101" class="LineNr">1101 </span> curr <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L38'>prev</a> <span id="L1102" class="LineNr">1102 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> <span id="L1103" class="LineNr">1103 </span> <span class="muControl"> loop</span> <span id="L1104" class="LineNr">1104 </span> <span class="Delimiter">}</span> @@ -1472,19 +1472,19 @@ if ('onhashchange' in window) { <span id="L1411" class="LineNr">1411 </span> <span class="muControl">break-if</span> before-cursor <span id="L1412" class="LineNr">1412 </span> <span class="Delimiter">{</span> <span id="L1413" class="LineNr">1413 </span> <span class="muControl">break-if</span> at-bottom-of-screen? -<span id="L1414" class="LineNr">1414 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1414" class="LineNr">1414 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1415" class="LineNr">1415 </span> <span class="Delimiter">}</span> <span id="L1416" class="LineNr">1416 </span> <span class="Delimiter">{</span> <span id="L1417" class="LineNr">1417 </span> <span class="muControl">break-unless</span> at-bottom-of-screen? <span id="L1418" class="LineNr">1418 </span> <span class="muControl"> jump</span> <span class="Constant">+try-to-scroll</span> <span id="L1419" class="LineNr">1419 </span> <span class="Delimiter">}</span> <span id="L1420" class="LineNr">1420 </span> <span class="Delimiter">}</span> -<span id="L1421" class="LineNr">1421 </span> <a href='../065duplex_list.mu.html#L25'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor +<span id="L1421" class="LineNr">1421 </span> <a href='../065duplex_list.mu.html#L31'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor <span id="L1422" class="LineNr">1422 </span> <span class="Delimiter">{</span> -<span id="L1423" class="LineNr">1423 </span> <span class="muControl">break-if</span> <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1423" class="LineNr">1423 </span> <span class="muControl">break-if</span> <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1424" class="LineNr">1424 </span> <span class="Delimiter">{</span> <span id="L1425" class="LineNr">1425 </span> <span class="muControl">break-if</span> at-bottom-of-screen? -<span id="L1426" class="LineNr">1426 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1426" class="LineNr">1426 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1427" class="LineNr">1427 </span> <span class="Delimiter">}</span> <span id="L1428" class="LineNr">1428 </span> <span class="Delimiter">{</span> <span id="L1429" class="LineNr">1429 </span> <span class="muControl">break-unless</span> at-bottom-of-screen? @@ -1498,22 +1498,22 @@ if ('onhashchange' in window) { <span id="L1437" class="LineNr">1437 </span> target-column:num <span class="Special"><-</span> copy cursor-column <span id="L1438" class="LineNr">1438 </span> <span class="Comment"># scan to start of next line</span> <span id="L1439" class="LineNr">1439 </span> <span class="Delimiter">{</span> -<span id="L1440" class="LineNr">1440 </span> <a href='../065duplex_list.mu.html#L25'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor -<span id="L1441" class="LineNr">1441 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1440" class="LineNr">1440 </span> <a href='../065duplex_list.mu.html#L31'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor +<span id="L1441" class="LineNr">1441 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1442" class="LineNr">1442 </span> done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, right <span id="L1443" class="LineNr">1443 </span> <span class="muControl">break-if</span> done? <span id="L1444" class="LineNr">1444 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> -<span id="L1445" class="LineNr">1445 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1445" class="LineNr">1445 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1446" class="LineNr">1446 </span> c:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> <span id="L1447" class="LineNr">1447 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> <span id="L1448" class="LineNr">1448 </span> <span class="muControl">break-if</span> at-newline? <span id="L1449" class="LineNr">1449 </span> <span class="muControl"> loop</span> <span id="L1450" class="LineNr">1450 </span> <span class="Delimiter">}</span> <span id="L1451" class="LineNr">1451 </span> <span class="Delimiter">{</span> -<span id="L1452" class="LineNr">1452 </span> <span class="muControl">break-if</span> <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1452" class="LineNr">1452 </span> <span class="muControl">break-if</span> <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1453" class="LineNr">1453 </span> <span class="Delimiter">{</span> <span id="L1454" class="LineNr">1454 </span> <span class="muControl">break-if</span> at-bottom-of-screen? -<span id="L1455" class="LineNr">1455 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1455" class="LineNr">1455 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1456" class="LineNr">1456 </span> <span class="Delimiter">}</span> <span id="L1457" class="LineNr">1457 </span> <span class="Delimiter">{</span> <span id="L1458" class="LineNr">1458 </span> <span class="muControl">break-unless</span> at-bottom-of-screen? @@ -1523,25 +1523,25 @@ if ('onhashchange' in window) { <span id="L1462" class="LineNr">1462 </span> cursor-row <span class="Special"><-</span> add cursor-row,<span class="Constant"> 1</span> <span id="L1463" class="LineNr">1463 </span> cursor-column <span class="Special"><-</span> copy left <span id="L1464" class="LineNr">1464 </span> <span class="Delimiter">{</span> -<span id="L1465" class="LineNr">1465 </span> <a href='../065duplex_list.mu.html#L25'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor -<span id="L1466" class="LineNr">1466 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1465" class="LineNr">1465 </span> <a href='../065duplex_list.mu.html#L31'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor +<span id="L1466" class="LineNr">1466 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1467" class="LineNr">1467 </span> c:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> <span id="L1468" class="LineNr">1468 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> <span id="L1469" class="LineNr">1469 </span> <span class="muControl">break-if</span> at-newline? <span id="L1470" class="LineNr">1470 </span> done?:bool <span class="Special"><-</span> greater-or-equal cursor-column, target-column <span id="L1471" class="LineNr">1471 </span> <span class="muControl">break-if</span> done? <span id="L1472" class="LineNr">1472 </span> cursor-column <span class="Special"><-</span> add cursor-column,<span class="Constant"> 1</span> -<span id="L1473" class="LineNr">1473 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1473" class="LineNr">1473 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1474" class="LineNr">1474 </span> <span class="muControl"> loop</span> <span id="L1475" class="LineNr">1475 </span> <span class="Delimiter">}</span> <span id="L1476" class="LineNr">1476 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor <span id="L1477" class="LineNr">1477 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column <span id="L1478" class="LineNr">1478 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>, cursor-row -<span id="L1479" class="LineNr">1479 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1479" class="LineNr">1479 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1480" class="LineNr">1480 </span> <span class="Delimiter">}</span> <span id="L1481" class="LineNr">1481 </span><span class="Constant"> +try-to-scroll</span> <span id="L1482" class="LineNr">1482 </span><span class="Constant"> <scroll-down></span> -<span id="L1483" class="LineNr">1483 </span> go-render? <span class="Special"><-</span> copy <span class="Constant">1/true</span> +<span id="L1483" class="LineNr">1483 </span> go-render? <span class="Special"><-</span> copy<span class="Constant"> true</span> <span id="L1484" class="LineNr">1484 </span>] <span id="L1485" class="LineNr">1485 </span> <span id="L1486" class="LineNr">1486 </span><span class="muScenario">scenario</span> editor-adjusts-column-at-next-line [ @@ -1650,7 +1650,7 @@ if ('onhashchange' in window) { <span id="L1589" class="LineNr">1589 </span> <a href='003-shortcuts.mu.html#L1610'>move-to-start-of-screen-line</a> editor <span id="L1590" class="LineNr">1590 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> <span id="L1591" class="LineNr">1591 </span><span class="Constant"> <end-move-cursor></span> -<span id="L1592" class="LineNr">1592 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1592" class="LineNr">1592 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1593" class="LineNr">1593 </span> <span class="Delimiter">}</span> <span id="L1594" class="LineNr">1594 </span>] <span id="L1595" class="LineNr">1595 </span> @@ -1662,7 +1662,7 @@ if ('onhashchange' in window) { <span id="L1601" class="LineNr">1601 </span> <a href='003-shortcuts.mu.html#L1610'>move-to-start-of-screen-line</a> editor <span id="L1602" class="LineNr">1602 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> <span id="L1603" class="LineNr">1603 </span><span class="Constant"> <end-move-cursor></span> -<span id="L1604" class="LineNr">1604 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1604" class="LineNr">1604 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1605" class="LineNr">1605 </span> <span class="Delimiter">}</span> <span id="L1606" class="LineNr">1606 </span>] <span id="L1607" class="LineNr">1607 </span> @@ -1681,7 +1681,7 @@ if ('onhashchange' in window) { <span id="L1620" class="LineNr">1620 </span> done?:bool <span class="Special"><-</span> equal col, left <span id="L1621" class="LineNr">1621 </span> <span class="muControl">break-if</span> done? <span id="L1622" class="LineNr">1622 </span> assert curr, <span class="Constant">[move-to-start-of-line tried to move before start of text]</span> -<span id="L1623" class="LineNr">1623 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> curr +<span id="L1623" class="LineNr">1623 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> curr <span id="L1624" class="LineNr">1624 </span> col <span class="Special"><-</span> subtract col,<span class="Constant"> 1</span> <span id="L1625" class="LineNr">1625 </span> <span class="muControl"> loop</span> <span id="L1626" class="LineNr">1626 </span> <span class="Delimiter">}</span> @@ -1875,7 +1875,7 @@ if ('onhashchange' in window) { <span id="L1814" class="LineNr">1814 </span> <a href='003-shortcuts.mu.html#L1833'>move-to-end-of-line</a> editor <span id="L1815" class="LineNr">1815 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> <span id="L1816" class="LineNr">1816 </span><span class="Constant"> <end-move-cursor></span> -<span id="L1817" class="LineNr">1817 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1817" class="LineNr">1817 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1818" class="LineNr">1818 </span> <span class="Delimiter">}</span> <span id="L1819" class="LineNr">1819 </span>] <span id="L1820" class="LineNr">1820 </span> @@ -1887,7 +1887,7 @@ if ('onhashchange' in window) { <span id="L1826" class="LineNr">1826 </span> <a href='003-shortcuts.mu.html#L1833'>move-to-end-of-line</a> editor <span id="L1827" class="LineNr">1827 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> <span id="L1828" class="LineNr">1828 </span><span class="Constant"> <end-move-cursor></span> -<span id="L1829" class="LineNr">1829 </span> <span class="muControl"> return</span> <span class="Constant">0/don't-render</span> +<span id="L1829" class="LineNr">1829 </span> <span class="muControl"> return</span><span class="Constant"> false/don't-render</span> <span id="L1830" class="LineNr">1830 </span> <span class="Delimiter">}</span> <span id="L1831" class="LineNr">1831 </span>] <span id="L1832" class="LineNr">1832 </span> @@ -1899,8 +1899,8 @@ if ('onhashchange' in window) { <span id="L1838" class="LineNr">1838 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> <span id="L1839" class="LineNr">1839 </span> <span class="Comment"># while not at end of line, move</span> <span id="L1840" class="LineNr">1840 </span> <span class="Delimiter">{</span> -<span id="L1841" class="LineNr">1841 </span> <a href='../065duplex_list.mu.html#L25'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor -<span id="L1842" class="LineNr">1842 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L25'>next</a> <span class="Comment"># end of text</span> +<span id="L1841" class="LineNr">1841 </span> <a href='../065duplex_list.mu.html#L31'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor +<span id="L1842" class="LineNr">1842 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L31'>next</a> <span class="Comment"># end of text</span> <span id="L1843" class="LineNr">1843 </span> nextc:char <span class="Special"><-</span> get *next, <span class="Constant">value:offset</span> <span id="L1844" class="LineNr">1844 </span> at-end-of-line?:bool <span class="Special"><-</span> equal nextc, <span class="Constant">10/newline</span> <span id="L1845" class="LineNr">1845 </span> <span class="muControl">break-if</span> at-end-of-line? @@ -1908,7 +1908,7 @@ if ('onhashchange' in window) { <span id="L1847" class="LineNr">1847 </span> at-right?:bool <span class="Special"><-</span> equal cursor-column, right <span id="L1848" class="LineNr">1848 </span> <span class="muControl">break-if</span> at-right? <span id="L1849" class="LineNr">1849 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column -<span id="L1850" class="LineNr">1850 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L1850" class="LineNr">1850 </span> before-cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L31'>next</a> <span id="L1851" class="LineNr">1851 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor <span id="L1852" class="LineNr">1852 </span> <span class="muControl"> loop</span> <span id="L1853" class="LineNr">1853 </span> <span class="Delimiter">}</span> @@ -2086,8 +2086,8 @@ if ('onhashchange' in window) { <span id="L2025" class="LineNr">2025 </span> <span class="Delimiter">{</span> <span id="L2026" class="LineNr">2026 </span> <span class="Comment"># if we have a wrapped line, give up and render the whole screen</span> <span id="L2027" class="LineNr">2027 </span> wrap?:bool <span class="Special"><-</span> greater-or-equal i, right -<span id="L2028" class="LineNr">2028 </span> <span class="muControl">return-if</span> wrap?, <span class="Constant">1/go-render</span> -<span id="L2029" class="LineNr">2029 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> curr +<span id="L2028" class="LineNr">2028 </span> <span class="muControl">return-if</span> wrap?,<span class="Constant"> true/go-render</span> +<span id="L2029" class="LineNr">2029 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> curr <span id="L2030" class="LineNr">2030 </span> <span class="muControl">break-unless</span> curr <span id="L2031" class="LineNr">2031 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> <span id="L2032" class="LineNr">2032 </span> b:bool <span class="Special"><-</span> equal c,<span class="Constant"> 10</span> @@ -2102,11 +2102,11 @@ if ('onhashchange' in window) { <span id="L2041" class="LineNr">2041 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> <span id="L2042" class="LineNr">2042 </span> end:num <span class="Special"><-</span> subtract right, left <span id="L2043" class="LineNr">2043 </span> wrap?:bool <span class="Special"><-</span> greater-or-equal old-row-len, end -<span id="L2044" class="LineNr">2044 </span> <span class="muControl">return-if</span> wrap?, <span class="Constant">1/go-render</span> +<span id="L2044" class="LineNr">2044 </span> <span class="muControl">return-if</span> wrap?,<span class="Constant"> true/go-render</span> <span id="L2045" class="LineNr">2045 </span> curr-line:text <span class="Special"><-</span> <a href='../061text.mu.html#L338'>buffer-to-array</a> buf <span id="L2046" class="LineNr">2046 </span> curr-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> <span id="L2047" class="LineNr">2047 </span> <a href='003-shortcuts.mu.html#L2107'>render-code</a> <a href='../081print.mu.html#L16'>screen</a>, curr-line, curr-column, right, curr-row -<span id="L2048" class="LineNr">2048 </span> <span class="muControl"> return</span> <span class="Constant">0/dont-render</span> +<span id="L2048" class="LineNr">2048 </span> <span class="muControl"> return</span><span class="Constant"> false/dont-render</span> <span id="L2049" class="LineNr">2049 </span>] <span id="L2050" class="LineNr">2050 </span> <span id="L2051" class="LineNr">2051 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L2051'>delete-to-start-of-line</a> editor:&:editor<span class="muRecipe"> -> </span>result:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char, editor:&:editor [ @@ -2115,10 +2115,10 @@ if ('onhashchange' in window) { <span id="L2054" class="LineNr">2054 </span> <span class="Comment"># compute range to delete</span> <span id="L2055" class="LineNr">2055 </span> init:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> <span id="L2056" class="LineNr">2056 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L2057" class="LineNr">2057 </span> update-top-of-screen?:bool <span class="Special"><-</span> copy <span class="Constant">0/false</span> +<span id="L2057" class="LineNr">2057 </span> update-top-of-screen?:bool <span class="Special"><-</span> copy<span class="Constant"> false</span> <span id="L2058" class="LineNr">2058 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> <span id="L2059" class="LineNr">2059 </span> start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy before-cursor -<span id="L2060" class="LineNr">2060 </span> end:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-cursor +<span id="L2060" class="LineNr">2060 </span> end:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-cursor <span id="L2061" class="LineNr">2061 </span> <span class="Delimiter">{</span> <span id="L2062" class="LineNr">2062 </span> at-start-of-text?:bool <span class="Special"><-</span> equal start, init <span id="L2063" class="LineNr">2063 </span> <span class="muControl">break-if</span> at-start-of-text? @@ -2128,13 +2128,13 @@ if ('onhashchange' in window) { <span id="L2067" class="LineNr">2067 </span> <span class="Comment"># if we went past top-of-screen, make a note to update it as well</span> <span id="L2068" class="LineNr">2068 </span> at-top-of-screen?:bool <span class="Special"><-</span> equal start, top-of-screen <span id="L2069" class="LineNr">2069 </span> update-top-of-screen?:bool <span class="Special"><-</span> or update-top-of-screen?, at-top-of-screen? -<span id="L2070" class="LineNr">2070 </span> start <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> start +<span id="L2070" class="LineNr">2070 </span> start <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> start <span id="L2071" class="LineNr">2071 </span> assert start, <span class="Constant">[delete-to-start-of-line tried to move before start of text]</span> <span id="L2072" class="LineNr">2072 </span> <span class="muControl"> loop</span> <span id="L2073" class="LineNr">2073 </span> <span class="Delimiter">}</span> <span id="L2074" class="LineNr">2074 </span> <span class="Comment"># snip it out</span> -<span id="L2075" class="LineNr">2075 </span> result:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> start -<span id="L2076" class="LineNr">2076 </span> <a href='../065duplex_list.mu.html#L385'>remove-between</a> start, end +<span id="L2075" class="LineNr">2075 </span> result:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> start +<span id="L2076" class="LineNr">2076 </span> <a href='../065duplex_list.mu.html#L391'>remove-between</a> start, end <span id="L2077" class="LineNr">2077 </span> <span class="Comment"># update top-of-screen if it's just been invalidated</span> <span id="L2078" class="LineNr">2078 </span> <span class="Delimiter">{</span> <span id="L2079" class="LineNr">2079 </span> <span class="muControl">break-unless</span> update-top-of-screen? @@ -2656,7 +2656,7 @@ if ('onhashchange' in window) { <span id="L2595" class="LineNr">2595 </span> <span class="Constant">local-scope</span> <span id="L2596" class="LineNr">2596 </span> <span class="Constant">load-inputs</span> <span id="L2597" class="LineNr">2597 </span> <span class="Comment"># if we deleted nothing, there's nothing to render</span> -<span id="L2598" class="LineNr">2598 </span> <span class="muControl">return-unless</span> deleted-cells, <span class="Constant">0/dont-render</span> +<span id="L2598" class="LineNr">2598 </span> <span class="muControl">return-unless</span> deleted-cells,<span class="Constant"> false/dont-render</span> <span id="L2599" class="LineNr">2599 </span> <span class="Comment"># if the line used to wrap before, give up and render the whole screen</span> <span id="L2600" class="LineNr">2600 </span> curr-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> <span id="L2601" class="LineNr">2601 </span> num-deleted-cells:num <span class="Special"><-</span> length deleted-cells @@ -2665,9 +2665,9 @@ if ('onhashchange' in window) { <span id="L2604" class="LineNr">2604 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> <span id="L2605" class="LineNr">2605 </span> end:num <span class="Special"><-</span> subtract right, left <span id="L2606" class="LineNr">2606 </span> wrap?:bool <span class="Special"><-</span> greater-or-equal old-row-len, end -<span id="L2607" class="LineNr">2607 </span> <span class="muControl">return-if</span> wrap?, <span class="Constant">1/go-render</span> +<span id="L2607" class="LineNr">2607 </span> <span class="muControl">return-if</span> wrap?,<span class="Constant"> true/go-render</span> <span id="L2608" class="LineNr">2608 </span> <a href='../081print.mu.html#L553'>clear-line-until</a> <a href='../081print.mu.html#L16'>screen</a>, right -<span id="L2609" class="LineNr">2609 </span> <span class="muControl"> return</span> <span class="Constant">0/dont-render</span> +<span id="L2609" class="LineNr">2609 </span> <span class="muControl"> return</span><span class="Constant"> false/dont-render</span> <span id="L2610" class="LineNr">2610 </span>] <span id="L2611" class="LineNr">2611 </span> <span id="L2612" class="LineNr">2612 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L2612'>delete-to-end-of-line</a> editor:&:editor<span class="muRecipe"> -> </span>result:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char, editor:&:editor [ @@ -2675,19 +2675,19 @@ if ('onhashchange' in window) { <span id="L2614" class="LineNr">2614 </span> <span class="Constant">load-inputs</span> <span id="L2615" class="LineNr">2615 </span> <span class="Comment"># compute range to delete</span> <span id="L2616" class="LineNr">2616 </span> start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> -<span id="L2617" class="LineNr">2617 </span> end:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> start +<span id="L2617" class="LineNr">2617 </span> end:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> start <span id="L2618" class="LineNr">2618 </span> <span class="Delimiter">{</span> -<span id="L2619" class="LineNr">2619 </span> at-end-of-text?:bool <span class="Special"><-</span> equal end, <span class="Constant">0/null</span> +<span id="L2619" class="LineNr">2619 </span> at-end-of-text?:bool <span class="Special"><-</span> equal end,<span class="Constant"> null</span> <span id="L2620" class="LineNr">2620 </span> <span class="muControl">break-if</span> at-end-of-text? <span id="L2621" class="LineNr">2621 </span> curr:char <span class="Special"><-</span> get *end, <span class="Constant">value:offset</span> <span id="L2622" class="LineNr">2622 </span> at-end-of-line?:bool <span class="Special"><-</span> equal curr, <span class="Constant">10/newline</span> <span id="L2623" class="LineNr">2623 </span> <span class="muControl">break-if</span> at-end-of-line? -<span id="L2624" class="LineNr">2624 </span> end <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> end +<span id="L2624" class="LineNr">2624 </span> end <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> end <span id="L2625" class="LineNr">2625 </span> <span class="muControl"> loop</span> <span id="L2626" class="LineNr">2626 </span> <span class="Delimiter">}</span> <span id="L2627" class="LineNr">2627 </span> <span class="Comment"># snip it out</span> -<span id="L2628" class="LineNr">2628 </span> result <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> start -<span id="L2629" class="LineNr">2629 </span> <a href='../065duplex_list.mu.html#L385'>remove-between</a> start, end +<span id="L2628" class="LineNr">2628 </span> result <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> start +<span id="L2629" class="LineNr">2629 </span> <a href='../065duplex_list.mu.html#L391'>remove-between</a> start, end <span id="L2630" class="LineNr">2630 </span>] <span id="L2631" class="LineNr">2631 </span> <span id="L2632" class="LineNr">2632 </span><span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-2 [ @@ -2897,1617 +2897,1630 @@ if ('onhashchange' in window) { <span id="L2836" class="LineNr">2836 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> <span id="L2837" class="LineNr">2837 </span> max:num <span class="Special"><-</span> subtract right, left <span id="L2838" class="LineNr">2838 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy top-of-screen -<span id="L2839" class="LineNr">2839 </span> top-of-screen <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L2849'>before-start-of-next-line</a> top-of-screen, max +<span id="L2839" class="LineNr">2839 </span> top-of-screen <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L2862'>before-start-of-next-line</a> top-of-screen, max <span id="L2840" class="LineNr">2840 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen <span id="L2841" class="LineNr">2841 </span> no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen -<span id="L2842" class="LineNr">2842 </span> <span class="muControl">return-if</span> no-movement?, <span class="Constant">0/don't-render</span> +<span id="L2842" class="LineNr">2842 </span> <span class="muControl">return-if</span> no-movement?,<span class="Constant"> false/don't-render</span> <span id="L2843" class="LineNr">2843 </span>] <span id="L2844" class="LineNr">2844 </span> -<span id="L2845" class="LineNr">2845 </span><span class="Comment"># Takes a pointer into the doubly-linked list, scans ahead at most 'max'</span> -<span id="L2846" class="LineNr">2846 </span><span class="Comment"># positions until the next newline.</span> -<span id="L2847" class="LineNr">2847 </span><span class="Comment"># Returns original if no next newline.</span> -<span id="L2848" class="LineNr">2848 </span><span class="Comment"># Beware: never return null pointer.</span> -<span id="L2849" class="LineNr">2849 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L2849'>before-start-of-next-line</a> original:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char, max:num<span class="muRecipe"> -> </span>curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char [ -<span id="L2850" class="LineNr">2850 </span> <span class="Constant">local-scope</span> -<span id="L2851" class="LineNr">2851 </span> <span class="Constant">load-inputs</span> -<span id="L2852" class="LineNr">2852 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> -<span id="L2853" class="LineNr">2853 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy original -<span id="L2854" class="LineNr">2854 </span> <span class="Comment"># skip the initial newline if it exists</span> -<span id="L2855" class="LineNr">2855 </span> <span class="Delimiter">{</span> -<span id="L2856" class="LineNr">2856 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> -<span id="L2857" class="LineNr">2857 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> -<span id="L2858" class="LineNr">2858 </span> <span class="muControl">break-unless</span> at-newline? -<span id="L2859" class="LineNr">2859 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> curr -<span id="L2860" class="LineNr">2860 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> -<span id="L2861" class="LineNr">2861 </span> <span class="Delimiter">}</span> -<span id="L2862" class="LineNr">2862 </span> <span class="Delimiter">{</span> -<span id="L2863" class="LineNr">2863 </span> <span class="muControl">return-unless</span> curr, original -<span id="L2864" class="LineNr">2864 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max -<span id="L2865" class="LineNr">2865 </span> <span class="muControl">break-if</span> done? -<span id="L2866" class="LineNr">2866 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> -<span id="L2867" class="LineNr">2867 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> -<span id="L2868" class="LineNr">2868 </span> <span class="muControl">break-if</span> at-newline? -<span id="L2869" class="LineNr">2869 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> curr -<span id="L2870" class="LineNr">2870 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> -<span id="L2871" class="LineNr">2871 </span> <span class="muControl"> loop</span> -<span id="L2872" class="LineNr">2872 </span> <span class="Delimiter">}</span> -<span id="L2873" class="LineNr">2873 </span> <span class="muControl">return-unless</span> curr, original -<span id="L2874" class="LineNr">2874 </span> <span class="muControl"> return</span> curr -<span id="L2875" class="LineNr">2875 </span>] -<span id="L2876" class="LineNr">2876 </span> -<span id="L2877" class="LineNr">2877 </span><span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys [ -<span id="L2878" class="LineNr">2878 </span> <span class="Constant">local-scope</span> -<span id="L2879" class="LineNr">2879 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L2880" class="LineNr">2880 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L2881" class="LineNr">2881 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> -<span id="L2882" class="LineNr">2882 </span> <span class="Comment"># other lines</span> -<span id="L2883" class="LineNr">2883 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span id="L2884" class="LineNr">2884 </span><span class="Constant">g</span> -<span id="L2885" class="LineNr">2885 </span><span class="Constant">h</span> -<span id="L2886" class="LineNr">2886 </span><span class="Constant">i]</span> -<span id="L2887" class="LineNr">2887 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L2888" class="LineNr">2888 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L2889" class="LineNr">2889 </span> screen-should-contain [ -<span id="L2890" class="LineNr">2890 </span> <span class="Constant"> . .</span> -<span id="L2891" class="LineNr">2891 </span> <span class="Constant"> .abcd↩ .</span> -<span id="L2892" class="LineNr">2892 </span> <span class="Constant"> .ef .</span> -<span id="L2893" class="LineNr">2893 </span> <span class="Constant"> .g .</span> -<span id="L2894" class="LineNr">2894 </span> ] -<span id="L2895" class="LineNr">2895 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> -<span id="L2896" class="LineNr">2896 </span> assume-console [ -<span id="L2897" class="LineNr">2897 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<span id="L2898" class="LineNr">2898 </span> press down-arrow -<span id="L2899" class="LineNr">2899 </span> ] -<span id="L2900" class="LineNr">2900 </span> run [ -<span id="L2901" class="LineNr">2901 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L2902" class="LineNr">2902 </span> ] -<span id="L2903" class="LineNr">2903 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L2904" class="LineNr">2904 </span> screen-should-contain [ -<span id="L2905" class="LineNr">2905 </span> <span class="Constant"> . .</span> -<span id="L2906" class="LineNr">2906 </span> <span class="Constant"> .ef .</span> -<span id="L2907" class="LineNr">2907 </span> <span class="Constant"> .g .</span> -<span id="L2908" class="LineNr">2908 </span> <span class="Constant"> .h .</span> -<span id="L2909" class="LineNr">2909 </span> ] -<span id="L2910" class="LineNr">2910 </span>] -<span id="L2911" class="LineNr">2911 </span> -<span id="L2912" class="LineNr">2912 </span><span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys-2 [ -<span id="L2913" class="LineNr">2913 </span> <span class="Constant">local-scope</span> -<span id="L2914" class="LineNr">2914 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L2915" class="LineNr">2915 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L2916" class="LineNr">2916 </span> <span class="Comment"># editor starts with a long line wrapping twice</span> -<span id="L2917" class="LineNr">2917 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> -<span id="L2918" class="LineNr">2918 </span><span class="Constant">k</span> -<span id="L2919" class="LineNr">2919 </span><span class="Constant">l</span> -<span id="L2920" class="LineNr">2920 </span><span class="Constant">m]</span> -<span id="L2921" class="LineNr">2921 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L2922" class="LineNr">2922 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> -<span id="L2923" class="LineNr">2923 </span> assume-console [ -<span id="L2924" class="LineNr">2924 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<span id="L2925" class="LineNr">2925 </span> press down-arrow -<span id="L2926" class="LineNr">2926 </span> ] -<span id="L2927" class="LineNr">2927 </span> run [ -<span id="L2928" class="LineNr">2928 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L2929" class="LineNr">2929 </span> ] -<span id="L2930" class="LineNr">2930 </span> <span class="Comment"># screen shows partial wrapped line containing a wrap icon</span> -<span id="L2931" class="LineNr">2931 </span> screen-should-contain [ -<span id="L2932" class="LineNr">2932 </span> <span class="Constant"> . .</span> -<span id="L2933" class="LineNr">2933 </span> <span class="Constant"> .efgh↩ .</span> -<span id="L2934" class="LineNr">2934 </span> <span class="Constant"> .ij .</span> -<span id="L2935" class="LineNr">2935 </span> <span class="Constant"> .k .</span> -<span id="L2936" class="LineNr">2936 </span> ] -<span id="L2937" class="LineNr">2937 </span> <span class="Comment"># scroll down again</span> -<span id="L2938" class="LineNr">2938 </span> assume-console [ -<span id="L2939" class="LineNr">2939 </span> press down-arrow -<span id="L2940" class="LineNr">2940 </span> ] -<span id="L2941" class="LineNr">2941 </span> run [ -<span id="L2942" class="LineNr">2942 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L2943" class="LineNr">2943 </span> ] -<span id="L2944" class="LineNr">2944 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L2945" class="LineNr">2945 </span> screen-should-contain [ -<span id="L2946" class="LineNr">2946 </span> <span class="Constant"> . .</span> +<span id="L2845" class="LineNr">2845 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L888'><scroll-down2></a></span> [ +<span id="L2846" class="LineNr">2846 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll down]</span> +<span id="L2847" class="LineNr">2847 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L2848" class="LineNr">2848 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<span id="L2849" class="LineNr">2849 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<span id="L2850" class="LineNr">2850 </span> max:num <span class="Special"><-</span> subtract right, left +<span id="L2851" class="LineNr">2851 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy top-of-screen +<span id="L2852" class="LineNr">2852 </span> top-of-screen <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L2862'>before-start-of-next-line</a> top-of-screen, max +<span id="L2853" class="LineNr">2853 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen +<span id="L2854" class="LineNr">2854 </span> no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen +<span id="L2855" class="LineNr">2855 </span> <span class="muControl">return-if</span> no-movement? +<span id="L2856" class="LineNr">2856 </span>] +<span id="L2857" class="LineNr">2857 </span> +<span id="L2858" class="LineNr">2858 </span><span class="Comment"># Takes a pointer into the doubly-linked list, scans ahead at most 'max'</span> +<span id="L2859" class="LineNr">2859 </span><span class="Comment"># positions until the next newline.</span> +<span id="L2860" class="LineNr">2860 </span><span class="Comment"># Returns original if no next newline.</span> +<span id="L2861" class="LineNr">2861 </span><span class="Comment"># Beware: never return null pointer.</span> +<span id="L2862" class="LineNr">2862 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L2862'>before-start-of-next-line</a> original:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char, max:num<span class="muRecipe"> -> </span>curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char [ +<span id="L2863" class="LineNr">2863 </span> <span class="Constant">local-scope</span> +<span id="L2864" class="LineNr">2864 </span> <span class="Constant">load-inputs</span> +<span id="L2865" class="LineNr">2865 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<span id="L2866" class="LineNr">2866 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy original +<span id="L2867" class="LineNr">2867 </span> <span class="Comment"># skip the initial newline if it exists</span> +<span id="L2868" class="LineNr">2868 </span> <span class="Delimiter">{</span> +<span id="L2869" class="LineNr">2869 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<span id="L2870" class="LineNr">2870 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> +<span id="L2871" class="LineNr">2871 </span> <span class="muControl">break-unless</span> at-newline? +<span id="L2872" class="LineNr">2872 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> curr +<span id="L2873" class="LineNr">2873 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<span id="L2874" class="LineNr">2874 </span> <span class="Delimiter">}</span> +<span id="L2875" class="LineNr">2875 </span> <span class="Delimiter">{</span> +<span id="L2876" class="LineNr">2876 </span> <span class="muControl">return-unless</span> curr, original +<span id="L2877" class="LineNr">2877 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max +<span id="L2878" class="LineNr">2878 </span> <span class="muControl">break-if</span> done? +<span id="L2879" class="LineNr">2879 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<span id="L2880" class="LineNr">2880 </span> at-newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> +<span id="L2881" class="LineNr">2881 </span> <span class="muControl">break-if</span> at-newline? +<span id="L2882" class="LineNr">2882 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> curr +<span id="L2883" class="LineNr">2883 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<span id="L2884" class="LineNr">2884 </span> <span class="muControl"> loop</span> +<span id="L2885" class="LineNr">2885 </span> <span class="Delimiter">}</span> +<span id="L2886" class="LineNr">2886 </span> <span class="muControl">return-unless</span> curr, original +<span id="L2887" class="LineNr">2887 </span> <span class="muControl"> return</span> curr +<span id="L2888" class="LineNr">2888 </span>] +<span id="L2889" class="LineNr">2889 </span> +<span id="L2890" class="LineNr">2890 </span><span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys [ +<span id="L2891" class="LineNr">2891 </span> <span class="Constant">local-scope</span> +<span id="L2892" class="LineNr">2892 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L2893" class="LineNr">2893 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L2894" class="LineNr">2894 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> +<span id="L2895" class="LineNr">2895 </span> <span class="Comment"># other lines</span> +<span id="L2896" class="LineNr">2896 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<span id="L2897" class="LineNr">2897 </span><span class="Constant">g</span> +<span id="L2898" class="LineNr">2898 </span><span class="Constant">h</span> +<span id="L2899" class="LineNr">2899 </span><span class="Constant">i]</span> +<span id="L2900" class="LineNr">2900 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L2901" class="LineNr">2901 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L2902" class="LineNr">2902 </span> screen-should-contain [ +<span id="L2903" class="LineNr">2903 </span> <span class="Constant"> . .</span> +<span id="L2904" class="LineNr">2904 </span> <span class="Constant"> .abcd↩ .</span> +<span id="L2905" class="LineNr">2905 </span> <span class="Constant"> .ef .</span> +<span id="L2906" class="LineNr">2906 </span> <span class="Constant"> .g .</span> +<span id="L2907" class="LineNr">2907 </span> ] +<span id="L2908" class="LineNr">2908 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> +<span id="L2909" class="LineNr">2909 </span> assume-console [ +<span id="L2910" class="LineNr">2910 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L2911" class="LineNr">2911 </span> press down-arrow +<span id="L2912" class="LineNr">2912 </span> ] +<span id="L2913" class="LineNr">2913 </span> run [ +<span id="L2914" class="LineNr">2914 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L2915" class="LineNr">2915 </span> ] +<span id="L2916" class="LineNr">2916 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L2917" class="LineNr">2917 </span> screen-should-contain [ +<span id="L2918" class="LineNr">2918 </span> <span class="Constant"> . .</span> +<span id="L2919" class="LineNr">2919 </span> <span class="Constant"> .ef .</span> +<span id="L2920" class="LineNr">2920 </span> <span class="Constant"> .g .</span> +<span id="L2921" class="LineNr">2921 </span> <span class="Constant"> .h .</span> +<span id="L2922" class="LineNr">2922 </span> ] +<span id="L2923" class="LineNr">2923 </span>] +<span id="L2924" class="LineNr">2924 </span> +<span id="L2925" class="LineNr">2925 </span><span class="muScenario">scenario</span> editor-scrolls-down-past-wrapped-line-using-arrow-keys-2 [ +<span id="L2926" class="LineNr">2926 </span> <span class="Constant">local-scope</span> +<span id="L2927" class="LineNr">2927 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L2928" class="LineNr">2928 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L2929" class="LineNr">2929 </span> <span class="Comment"># editor starts with a long line wrapping twice</span> +<span id="L2930" class="LineNr">2930 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> +<span id="L2931" class="LineNr">2931 </span><span class="Constant">k</span> +<span id="L2932" class="LineNr">2932 </span><span class="Constant">l</span> +<span id="L2933" class="LineNr">2933 </span><span class="Constant">m]</span> +<span id="L2934" class="LineNr">2934 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L2935" class="LineNr">2935 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> +<span id="L2936" class="LineNr">2936 </span> assume-console [ +<span id="L2937" class="LineNr">2937 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L2938" class="LineNr">2938 </span> press down-arrow +<span id="L2939" class="LineNr">2939 </span> ] +<span id="L2940" class="LineNr">2940 </span> run [ +<span id="L2941" class="LineNr">2941 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L2942" class="LineNr">2942 </span> ] +<span id="L2943" class="LineNr">2943 </span> <span class="Comment"># screen shows partial wrapped line containing a wrap icon</span> +<span id="L2944" class="LineNr">2944 </span> screen-should-contain [ +<span id="L2945" class="LineNr">2945 </span> <span class="Constant"> . .</span> +<span id="L2946" class="LineNr">2946 </span> <span class="Constant"> .efgh↩ .</span> <span id="L2947" class="LineNr">2947 </span> <span class="Constant"> .ij .</span> <span id="L2948" class="LineNr">2948 </span> <span class="Constant"> .k .</span> -<span id="L2949" class="LineNr">2949 </span> <span class="Constant"> .l .</span> -<span id="L2950" class="LineNr">2950 </span> ] -<span id="L2951" class="LineNr">2951 </span>] -<span id="L2952" class="LineNr">2952 </span> -<span id="L2953" class="LineNr">2953 </span><span class="muScenario">scenario</span> editor-scrolls-down-when-line-wraps [ -<span id="L2954" class="LineNr">2954 </span> <span class="Constant">local-scope</span> -<span id="L2955" class="LineNr">2955 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L2956" class="LineNr">2956 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> -<span id="L2957" class="LineNr">2957 </span> <span class="Comment"># editor contains a long line in the third line</span> -<span id="L2958" class="LineNr">2958 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L2959" class="LineNr">2959 </span><span class="Constant">b</span> -<span id="L2960" class="LineNr">2960 </span><span class="Constant">cdef]</span> -<span id="L2961" class="LineNr">2961 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L2962" class="LineNr">2962 </span> <span class="Comment"># position cursor at end, type a character</span> -<span id="L2963" class="LineNr">2963 </span> assume-console [ -<span id="L2964" class="LineNr">2964 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> -<span id="L2965" class="LineNr">2965 </span> type <span class="Constant">[g]</span> -<span id="L2966" class="LineNr">2966 </span> ] -<span id="L2967" class="LineNr">2967 </span> run [ -<span id="L2968" class="LineNr">2968 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L2969" class="LineNr">2969 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L2970" class="LineNr">2970 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L2971" class="LineNr">2971 </span> ] -<span id="L2972" class="LineNr">2972 </span> <span class="Comment"># screen scrolls</span> -<span id="L2973" class="LineNr">2973 </span> screen-should-contain [ -<span id="L2974" class="LineNr">2974 </span> <span class="Constant"> . .</span> -<span id="L2975" class="LineNr">2975 </span> <span class="Constant"> .b .</span> -<span id="L2976" class="LineNr">2976 </span><span class="Constant"> .cdef↩.</span> -<span id="L2977" class="LineNr">2977 </span> <span class="Constant"> .g .</span> -<span id="L2978" class="LineNr">2978 </span> ] -<span id="L2979" class="LineNr">2979 </span> memory-should-contain [ -<span id="L2980" class="LineNr">2980 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<span id="L2981" class="LineNr">2981 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> -<span id="L2982" class="LineNr">2982 </span> ] -<span id="L2983" class="LineNr">2983 </span>] -<span id="L2984" class="LineNr">2984 </span> -<span id="L2985" class="LineNr">2985 </span><span class="muScenario">scenario</span> editor-stops-scrolling-once-bottom-is-visible [ -<span id="L2986" class="LineNr">2986 </span> <span class="Constant">local-scope</span> -<span id="L2987" class="LineNr">2987 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L2988" class="LineNr">2988 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L2989" class="LineNr">2989 </span> <span class="Comment"># initialize editor with 2 lines</span> -<span id="L2990" class="LineNr">2990 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L2991" class="LineNr">2991 </span><span class="Constant">b]</span> -<span id="L2992" class="LineNr">2992 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L2993" class="LineNr">2993 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L2994" class="LineNr">2994 </span> screen-should-contain [ -<span id="L2995" class="LineNr">2995 </span> <span class="Constant"> . .</span> -<span id="L2996" class="LineNr">2996 </span> <span class="Constant"> .a .</span> -<span id="L2997" class="LineNr">2997 </span> <span class="Constant"> .b .</span> -<span id="L2998" class="LineNr">2998 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L2999" class="LineNr">2999 </span> ] -<span id="L3000" class="LineNr">3000 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> -<span id="L3001" class="LineNr">3001 </span> assume-console [ -<span id="L3002" class="LineNr">3002 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<span id="L3003" class="LineNr">3003 </span> press down-arrow -<span id="L3004" class="LineNr">3004 </span> ] -<span id="L3005" class="LineNr">3005 </span> run [ -<span id="L3006" class="LineNr">3006 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3007" class="LineNr">3007 </span> ] -<span id="L3008" class="LineNr">3008 </span> <span class="Comment"># no change since the bottom border was already visible</span> -<span id="L3009" class="LineNr">3009 </span> screen-should-contain [ -<span id="L3010" class="LineNr">3010 </span> <span class="Constant"> . .</span> -<span id="L3011" class="LineNr">3011 </span> <span class="Constant"> .a .</span> -<span id="L3012" class="LineNr">3012 </span> <span class="Constant"> .b .</span> -<span id="L3013" class="LineNr">3013 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L3014" class="LineNr">3014 </span> ] -<span id="L3015" class="LineNr">3015 </span>] -<span id="L3016" class="LineNr">3016 </span> -<span id="L3017" class="LineNr">3017 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-newline [ -<span id="L3018" class="LineNr">3018 </span> <span class="Constant">local-scope</span> -<span id="L3019" class="LineNr">3019 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> -<span id="L3020" class="LineNr">3020 </span> <span class="Comment"># position cursor after last line and type newline</span> -<span id="L3021" class="LineNr">3021 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3022" class="LineNr">3022 </span><span class="Constant">b</span> -<span id="L3023" class="LineNr">3023 </span><span class="Constant">c]</span> -<span id="L3024" class="LineNr">3024 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3025" class="LineNr">3025 </span> assume-console [ -<span id="L3026" class="LineNr">3026 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> -<span id="L3027" class="LineNr">3027 </span> type [ +<span id="L2949" class="LineNr">2949 </span> ] +<span id="L2950" class="LineNr">2950 </span> <span class="Comment"># scroll down again</span> +<span id="L2951" class="LineNr">2951 </span> assume-console [ +<span id="L2952" class="LineNr">2952 </span> press down-arrow +<span id="L2953" class="LineNr">2953 </span> ] +<span id="L2954" class="LineNr">2954 </span> run [ +<span id="L2955" class="LineNr">2955 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L2956" class="LineNr">2956 </span> ] +<span id="L2957" class="LineNr">2957 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L2958" class="LineNr">2958 </span> screen-should-contain [ +<span id="L2959" class="LineNr">2959 </span> <span class="Constant"> . .</span> +<span id="L2960" class="LineNr">2960 </span> <span class="Constant"> .ij .</span> +<span id="L2961" class="LineNr">2961 </span> <span class="Constant"> .k .</span> +<span id="L2962" class="LineNr">2962 </span> <span class="Constant"> .l .</span> +<span id="L2963" class="LineNr">2963 </span> ] +<span id="L2964" class="LineNr">2964 </span>] +<span id="L2965" class="LineNr">2965 </span> +<span id="L2966" class="LineNr">2966 </span><span class="muScenario">scenario</span> editor-scrolls-down-when-line-wraps [ +<span id="L2967" class="LineNr">2967 </span> <span class="Constant">local-scope</span> +<span id="L2968" class="LineNr">2968 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L2969" class="LineNr">2969 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<span id="L2970" class="LineNr">2970 </span> <span class="Comment"># editor contains a long line in the third line</span> +<span id="L2971" class="LineNr">2971 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L2972" class="LineNr">2972 </span><span class="Constant">b</span> +<span id="L2973" class="LineNr">2973 </span><span class="Constant">cdef]</span> +<span id="L2974" class="LineNr">2974 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L2975" class="LineNr">2975 </span> <span class="Comment"># position cursor at end, type a character</span> +<span id="L2976" class="LineNr">2976 </span> assume-console [ +<span id="L2977" class="LineNr">2977 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> +<span id="L2978" class="LineNr">2978 </span> type <span class="Constant">[g]</span> +<span id="L2979" class="LineNr">2979 </span> ] +<span id="L2980" class="LineNr">2980 </span> run [ +<span id="L2981" class="LineNr">2981 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L2982" class="LineNr">2982 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L2983" class="LineNr">2983 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L2984" class="LineNr">2984 </span> ] +<span id="L2985" class="LineNr">2985 </span> <span class="Comment"># screen scrolls</span> +<span id="L2986" class="LineNr">2986 </span> screen-should-contain [ +<span id="L2987" class="LineNr">2987 </span> <span class="Constant"> . .</span> +<span id="L2988" class="LineNr">2988 </span> <span class="Constant"> .b .</span> +<span id="L2989" class="LineNr">2989 </span><span class="Constant"> .cdef↩.</span> +<span id="L2990" class="LineNr">2990 </span> <span class="Constant"> .g .</span> +<span id="L2991" class="LineNr">2991 </span> ] +<span id="L2992" class="LineNr">2992 </span> memory-should-contain [ +<span id="L2993" class="LineNr">2993 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L2994" class="LineNr">2994 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<span id="L2995" class="LineNr">2995 </span> ] +<span id="L2996" class="LineNr">2996 </span>] +<span id="L2997" class="LineNr">2997 </span> +<span id="L2998" class="LineNr">2998 </span><span class="muScenario">scenario</span> editor-stops-scrolling-once-bottom-is-visible [ +<span id="L2999" class="LineNr">2999 </span> <span class="Constant">local-scope</span> +<span id="L3000" class="LineNr">3000 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3001" class="LineNr">3001 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3002" class="LineNr">3002 </span> <span class="Comment"># initialize editor with 2 lines</span> +<span id="L3003" class="LineNr">3003 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3004" class="LineNr">3004 </span><span class="Constant">b]</span> +<span id="L3005" class="LineNr">3005 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3006" class="LineNr">3006 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3007" class="LineNr">3007 </span> screen-should-contain [ +<span id="L3008" class="LineNr">3008 </span> <span class="Constant"> . .</span> +<span id="L3009" class="LineNr">3009 </span> <span class="Constant"> .a .</span> +<span id="L3010" class="LineNr">3010 </span> <span class="Constant"> .b .</span> +<span id="L3011" class="LineNr">3011 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L3012" class="LineNr">3012 </span> ] +<span id="L3013" class="LineNr">3013 </span> <span class="Comment"># position cursor at last line, then try to move further down</span> +<span id="L3014" class="LineNr">3014 </span> assume-console [ +<span id="L3015" class="LineNr">3015 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L3016" class="LineNr">3016 </span> press down-arrow +<span id="L3017" class="LineNr">3017 </span> ] +<span id="L3018" class="LineNr">3018 </span> run [ +<span id="L3019" class="LineNr">3019 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3020" class="LineNr">3020 </span> ] +<span id="L3021" class="LineNr">3021 </span> <span class="Comment"># no change since the bottom border was already visible</span> +<span id="L3022" class="LineNr">3022 </span> screen-should-contain [ +<span id="L3023" class="LineNr">3023 </span> <span class="Constant"> . .</span> +<span id="L3024" class="LineNr">3024 </span> <span class="Constant"> .a .</span> +<span id="L3025" class="LineNr">3025 </span> <span class="Constant"> .b .</span> +<span id="L3026" class="LineNr">3026 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L3027" class="LineNr">3027 </span> ] <span id="L3028" class="LineNr">3028 </span>] -<span id="L3029" class="LineNr">3029 </span> ] -<span id="L3030" class="LineNr">3030 </span> run [ -<span id="L3031" class="LineNr">3031 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3032" class="LineNr">3032 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L3033" class="LineNr">3033 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L3034" class="LineNr">3034 </span> ] -<span id="L3035" class="LineNr">3035 </span> <span class="Comment"># screen scrolls</span> -<span id="L3036" class="LineNr">3036 </span> screen-should-contain [ -<span id="L3037" class="LineNr">3037 </span> <span class="Constant"> . .</span> -<span id="L3038" class="LineNr">3038 </span> <span class="Constant"> .b .</span> -<span id="L3039" class="LineNr">3039 </span> <span class="Constant"> .c .</span> -<span id="L3040" class="LineNr">3040 </span> <span class="Constant"> . .</span> -<span id="L3041" class="LineNr">3041 </span> ] -<span id="L3042" class="LineNr">3042 </span> memory-should-contain [ -<span id="L3043" class="LineNr">3043 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<span id="L3044" class="LineNr">3044 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> -<span id="L3045" class="LineNr">3045 </span> ] -<span id="L3046" class="LineNr">3046 </span>] -<span id="L3047" class="LineNr">3047 </span> -<span id="L3048" class="LineNr">3048 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow [ -<span id="L3049" class="LineNr">3049 </span> <span class="Constant">local-scope</span> -<span id="L3050" class="LineNr">3050 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3051" class="LineNr">3051 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> -<span id="L3052" class="LineNr">3052 </span> <span class="Comment"># editor contains a wrapped line</span> -<span id="L3053" class="LineNr">3053 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3054" class="LineNr">3054 </span><span class="Constant">b</span> -<span id="L3055" class="LineNr">3055 </span><span class="Constant">cdefgh]</span> -<span id="L3056" class="LineNr">3056 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3057" class="LineNr">3057 </span> <span class="Comment"># position cursor at end of screen and try to move right</span> -<span id="L3058" class="LineNr">3058 </span> assume-console [ -<span id="L3059" class="LineNr">3059 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> -<span id="L3060" class="LineNr">3060 </span> press right-arrow -<span id="L3061" class="LineNr">3061 </span> ] -<span id="L3062" class="LineNr">3062 </span> run [ -<span id="L3063" class="LineNr">3063 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3064" class="LineNr">3064 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L3065" class="LineNr">3065 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L3066" class="LineNr">3066 </span> ] -<span id="L3067" class="LineNr">3067 </span> <span class="Comment"># screen scrolls</span> -<span id="L3068" class="LineNr">3068 </span> screen-should-contain [ -<span id="L3069" class="LineNr">3069 </span> <span class="Constant"> . .</span> -<span id="L3070" class="LineNr">3070 </span> <span class="Constant"> .b .</span> -<span id="L3071" class="LineNr">3071 </span><span class="Constant"> .cdef↩.</span> -<span id="L3072" class="LineNr">3072 </span> <span class="Constant"> .gh .</span> -<span id="L3073" class="LineNr">3073 </span> ] -<span id="L3074" class="LineNr">3074 </span> memory-should-contain [ -<span id="L3075" class="LineNr">3075 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<span id="L3076" class="LineNr">3076 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> -<span id="L3077" class="LineNr">3077 </span> ] -<span id="L3078" class="LineNr">3078 </span>] -<span id="L3079" class="LineNr">3079 </span> -<span id="L3080" class="LineNr">3080 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow-2 [ -<span id="L3081" class="LineNr">3081 </span> <span class="Constant">local-scope</span> -<span id="L3082" class="LineNr">3082 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3083" class="LineNr">3083 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> -<span id="L3084" class="LineNr">3084 </span> <span class="Comment"># editor contains more lines than can fit on screen</span> -<span id="L3085" class="LineNr">3085 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3086" class="LineNr">3086 </span><span class="Constant">b</span> -<span id="L3087" class="LineNr">3087 </span><span class="Constant">c</span> -<span id="L3088" class="LineNr">3088 </span><span class="Constant">d]</span> -<span id="L3089" class="LineNr">3089 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3090" class="LineNr">3090 </span> <span class="Comment"># position cursor at end of screen and try to move right</span> -<span id="L3091" class="LineNr">3091 </span> assume-console [ -<span id="L3092" class="LineNr">3092 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> -<span id="L3093" class="LineNr">3093 </span> press right-arrow -<span id="L3094" class="LineNr">3094 </span> ] -<span id="L3095" class="LineNr">3095 </span> run [ -<span id="L3096" class="LineNr">3096 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3097" class="LineNr">3097 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L3098" class="LineNr">3098 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L3099" class="LineNr">3099 </span> ] -<span id="L3100" class="LineNr">3100 </span> <span class="Comment"># screen scrolls</span> -<span id="L3101" class="LineNr">3101 </span> screen-should-contain [ -<span id="L3102" class="LineNr">3102 </span> <span class="Constant"> . .</span> -<span id="L3103" class="LineNr">3103 </span> <span class="Constant"> .b .</span> -<span id="L3104" class="LineNr">3104 </span> <span class="Constant"> .c .</span> -<span id="L3105" class="LineNr">3105 </span> <span class="Constant"> .d .</span> -<span id="L3106" class="LineNr">3106 </span> ] -<span id="L3107" class="LineNr">3107 </span> memory-should-contain [ -<span id="L3108" class="LineNr">3108 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<span id="L3109" class="LineNr">3109 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> -<span id="L3110" class="LineNr">3110 </span> ] -<span id="L3111" class="LineNr">3111 </span>] -<span id="L3112" class="LineNr">3112 </span> -<span id="L3113" class="LineNr">3113 </span><span class="muScenario">scenario</span> editor-scrolls-at-end-on-down-arrow [ -<span id="L3114" class="LineNr">3114 </span> <span class="Constant">local-scope</span> -<span id="L3115" class="LineNr">3115 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L3116" class="LineNr">3116 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> -<span id="L3117" class="LineNr">3117 </span><span class="Constant">de]</span> -<span id="L3118" class="LineNr">3118 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3119" class="LineNr">3119 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3120" class="LineNr">3120 </span> $clear-trace -<span id="L3121" class="LineNr">3121 </span> <span class="Comment"># try to move down past end of text</span> -<span id="L3122" class="LineNr">3122 </span> assume-console [ -<span id="L3123" class="LineNr">3123 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> -<span id="L3124" class="LineNr">3124 </span> press down-arrow -<span id="L3125" class="LineNr">3125 </span> ] -<span id="L3126" class="LineNr">3126 </span> run [ -<span id="L3127" class="LineNr">3127 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3128" class="LineNr">3128 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L3129" class="LineNr">3129 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L3130" class="LineNr">3130 </span> ] -<span id="L3131" class="LineNr">3131 </span> <span class="Comment"># no change</span> -<span id="L3132" class="LineNr">3132 </span> memory-should-contain [ -<span id="L3133" class="LineNr">3133 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> -<span id="L3134" class="LineNr">3134 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> -<span id="L3135" class="LineNr">3135 </span> ] -<span id="L3136" class="LineNr">3136 </span>] -<span id="L3137" class="LineNr">3137 </span> -<span id="L3138" class="LineNr">3138 </span><span class="muScenario">scenario</span> editor-combines-page-and-line-scroll [ -<span id="L3139" class="LineNr">3139 </span> <span class="Constant">local-scope</span> -<span id="L3140" class="LineNr">3140 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3141" class="LineNr">3141 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3142" class="LineNr">3142 </span> <span class="Comment"># initialize editor with a few pages of lines</span> -<span id="L3143" class="LineNr">3143 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3144" class="LineNr">3144 </span><span class="Constant">b</span> -<span id="L3145" class="LineNr">3145 </span><span class="Constant">c</span> -<span id="L3146" class="LineNr">3146 </span><span class="Constant">d</span> -<span id="L3147" class="LineNr">3147 </span><span class="Constant">e</span> -<span id="L3148" class="LineNr">3148 </span><span class="Constant">f</span> -<span id="L3149" class="LineNr">3149 </span><span class="Constant">g]</span> -<span id="L3150" class="LineNr">3150 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3151" class="LineNr">3151 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3152" class="LineNr">3152 </span> <span class="Comment"># scroll down one page and one line</span> -<span id="L3153" class="LineNr">3153 </span> assume-console [ -<span id="L3154" class="LineNr">3154 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3155" class="LineNr">3155 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> -<span id="L3156" class="LineNr">3156 </span> press down-arrow -<span id="L3157" class="LineNr">3157 </span> ] -<span id="L3158" class="LineNr">3158 </span> run [ -<span id="L3159" class="LineNr">3159 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3160" class="LineNr">3160 </span> ] -<span id="L3161" class="LineNr">3161 </span> <span class="Comment"># screen scrolls down 3 lines</span> -<span id="L3162" class="LineNr">3162 </span> screen-should-contain [ -<span id="L3163" class="LineNr">3163 </span> <span class="Constant"> . .</span> -<span id="L3164" class="LineNr">3164 </span> <span class="Constant"> .d .</span> -<span id="L3165" class="LineNr">3165 </span> <span class="Constant"> .e .</span> -<span id="L3166" class="LineNr">3166 </span> <span class="Constant"> .f .</span> -<span id="L3167" class="LineNr">3167 </span> ] -<span id="L3168" class="LineNr">3168 </span>] -<span id="L3169" class="LineNr">3169 </span> -<span id="L3170" class="LineNr">3170 </span><span class="Comment"># scroll up if necessary</span> -<span id="L3171" class="LineNr">3171 </span> -<span id="L3172" class="LineNr">3172 </span><span class="muScenario">scenario</span> editor-can-scroll-up-using-arrow-keys [ -<span id="L3173" class="LineNr">3173 </span> <span class="Constant">local-scope</span> -<span id="L3174" class="LineNr">3174 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3175" class="LineNr">3175 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3176" class="LineNr">3176 </span> <span class="Comment"># initialize editor with >3 lines</span> -<span id="L3177" class="LineNr">3177 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3178" class="LineNr">3178 </span><span class="Constant">b</span> -<span id="L3179" class="LineNr">3179 </span><span class="Constant">c</span> -<span id="L3180" class="LineNr">3180 </span><span class="Constant">d]</span> -<span id="L3181" class="LineNr">3181 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3182" class="LineNr">3182 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3183" class="LineNr">3183 </span> screen-should-contain [ -<span id="L3184" class="LineNr">3184 </span> <span class="Constant"> . .</span> -<span id="L3185" class="LineNr">3185 </span> <span class="Constant"> .a .</span> -<span id="L3186" class="LineNr">3186 </span> <span class="Constant"> .b .</span> -<span id="L3187" class="LineNr">3187 </span> <span class="Constant"> .c .</span> -<span id="L3188" class="LineNr">3188 </span> ] -<span id="L3189" class="LineNr">3189 </span> <span class="Comment"># position cursor at top of second page, then try to move up</span> -<span id="L3190" class="LineNr">3190 </span> assume-console [ -<span id="L3191" class="LineNr">3191 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3192" class="LineNr">3192 </span> press up-arrow -<span id="L3193" class="LineNr">3193 </span> ] -<span id="L3194" class="LineNr">3194 </span> run [ -<span id="L3195" class="LineNr">3195 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3196" class="LineNr">3196 </span> ] -<span id="L3197" class="LineNr">3197 </span> <span class="Comment"># screen slides by one line</span> -<span id="L3198" class="LineNr">3198 </span> screen-should-contain [ -<span id="L3199" class="LineNr">3199 </span> <span class="Constant"> . .</span> -<span id="L3200" class="LineNr">3200 </span> <span class="Constant"> .b .</span> -<span id="L3201" class="LineNr">3201 </span> <span class="Constant"> .c .</span> -<span id="L3202" class="LineNr">3202 </span> <span class="Constant"> .d .</span> -<span id="L3203" class="LineNr">3203 </span> ] -<span id="L3204" class="LineNr">3204 </span>] -<span id="L3205" class="LineNr">3205 </span> -<span id="L3206" class="LineNr">3206 </span><span class="muRecipe">after</span> <span class="Constant"><scroll-up></span> [ -<span id="L3207" class="LineNr">3207 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll up]</span> -<span id="L3208" class="LineNr">3208 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3209" class="LineNr">3209 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy top-of-screen -<span id="L3210" class="LineNr">3210 </span> top-of-screen <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> top-of-screen, editor -<span id="L3211" class="LineNr">3211 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen -<span id="L3212" class="LineNr">3212 </span> no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen -<span id="L3213" class="LineNr">3213 </span> <span class="muControl">return-if</span> no-movement?, <span class="Constant">0/don't-render</span> -<span id="L3214" class="LineNr">3214 </span>] -<span id="L3215" class="LineNr">3215 </span> -<span id="L3216" class="LineNr">3216 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys [ -<span id="L3217" class="LineNr">3217 </span> <span class="Constant">local-scope</span> -<span id="L3218" class="LineNr">3218 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3219" class="LineNr">3219 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3220" class="LineNr">3220 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> -<span id="L3221" class="LineNr">3221 </span> <span class="Comment"># other lines</span> -<span id="L3222" class="LineNr">3222 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span id="L3223" class="LineNr">3223 </span><span class="Constant">g</span> -<span id="L3224" class="LineNr">3224 </span><span class="Constant">h</span> -<span id="L3225" class="LineNr">3225 </span><span class="Constant">i]</span> -<span id="L3226" class="LineNr">3226 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3227" class="LineNr">3227 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3228" class="LineNr">3228 </span> screen-should-contain [ -<span id="L3229" class="LineNr">3229 </span> <span class="Constant"> . .</span> -<span id="L3230" class="LineNr">3230 </span> <span class="Constant"> .abcd↩ .</span> -<span id="L3231" class="LineNr">3231 </span> <span class="Constant"> .ef .</span> -<span id="L3232" class="LineNr">3232 </span> <span class="Constant"> .g .</span> -<span id="L3233" class="LineNr">3233 </span> ] -<span id="L3234" class="LineNr">3234 </span> <span class="Comment"># position cursor at top of second page, just below wrapped line</span> -<span id="L3235" class="LineNr">3235 </span> assume-console [ -<span id="L3236" class="LineNr">3236 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3237" class="LineNr">3237 </span> ] -<span id="L3238" class="LineNr">3238 </span> run [ -<span id="L3239" class="LineNr">3239 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3240" class="LineNr">3240 </span> ] +<span id="L3029" class="LineNr">3029 </span> +<span id="L3030" class="LineNr">3030 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-newline [ +<span id="L3031" class="LineNr">3031 </span> <span class="Constant">local-scope</span> +<span id="L3032" class="LineNr">3032 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<span id="L3033" class="LineNr">3033 </span> <span class="Comment"># position cursor after last line and type newline</span> +<span id="L3034" class="LineNr">3034 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3035" class="LineNr">3035 </span><span class="Constant">b</span> +<span id="L3036" class="LineNr">3036 </span><span class="Constant">c]</span> +<span id="L3037" class="LineNr">3037 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3038" class="LineNr">3038 </span> assume-console [ +<span id="L3039" class="LineNr">3039 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 4</span> +<span id="L3040" class="LineNr">3040 </span> type [ +<span id="L3041" class="LineNr">3041 </span>] +<span id="L3042" class="LineNr">3042 </span> ] +<span id="L3043" class="LineNr">3043 </span> run [ +<span id="L3044" class="LineNr">3044 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3045" class="LineNr">3045 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L3046" class="LineNr">3046 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L3047" class="LineNr">3047 </span> ] +<span id="L3048" class="LineNr">3048 </span> <span class="Comment"># screen scrolls</span> +<span id="L3049" class="LineNr">3049 </span> screen-should-contain [ +<span id="L3050" class="LineNr">3050 </span> <span class="Constant"> . .</span> +<span id="L3051" class="LineNr">3051 </span> <span class="Constant"> .b .</span> +<span id="L3052" class="LineNr">3052 </span> <span class="Constant"> .c .</span> +<span id="L3053" class="LineNr">3053 </span> <span class="Constant"> . .</span> +<span id="L3054" class="LineNr">3054 </span> ] +<span id="L3055" class="LineNr">3055 </span> memory-should-contain [ +<span id="L3056" class="LineNr">3056 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L3057" class="LineNr">3057 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<span id="L3058" class="LineNr">3058 </span> ] +<span id="L3059" class="LineNr">3059 </span>] +<span id="L3060" class="LineNr">3060 </span> +<span id="L3061" class="LineNr">3061 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow [ +<span id="L3062" class="LineNr">3062 </span> <span class="Constant">local-scope</span> +<span id="L3063" class="LineNr">3063 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3064" class="LineNr">3064 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<span id="L3065" class="LineNr">3065 </span> <span class="Comment"># editor contains a wrapped line</span> +<span id="L3066" class="LineNr">3066 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3067" class="LineNr">3067 </span><span class="Constant">b</span> +<span id="L3068" class="LineNr">3068 </span><span class="Constant">cdefgh]</span> +<span id="L3069" class="LineNr">3069 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3070" class="LineNr">3070 </span> <span class="Comment"># position cursor at end of screen and try to move right</span> +<span id="L3071" class="LineNr">3071 </span> assume-console [ +<span id="L3072" class="LineNr">3072 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> +<span id="L3073" class="LineNr">3073 </span> press right-arrow +<span id="L3074" class="LineNr">3074 </span> ] +<span id="L3075" class="LineNr">3075 </span> run [ +<span id="L3076" class="LineNr">3076 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3077" class="LineNr">3077 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L3078" class="LineNr">3078 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L3079" class="LineNr">3079 </span> ] +<span id="L3080" class="LineNr">3080 </span> <span class="Comment"># screen scrolls</span> +<span id="L3081" class="LineNr">3081 </span> screen-should-contain [ +<span id="L3082" class="LineNr">3082 </span> <span class="Constant"> . .</span> +<span id="L3083" class="LineNr">3083 </span> <span class="Constant"> .b .</span> +<span id="L3084" class="LineNr">3084 </span><span class="Constant"> .cdef↩.</span> +<span id="L3085" class="LineNr">3085 </span> <span class="Constant"> .gh .</span> +<span id="L3086" class="LineNr">3086 </span> ] +<span id="L3087" class="LineNr">3087 </span> memory-should-contain [ +<span id="L3088" class="LineNr">3088 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L3089" class="LineNr">3089 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<span id="L3090" class="LineNr">3090 </span> ] +<span id="L3091" class="LineNr">3091 </span>] +<span id="L3092" class="LineNr">3092 </span> +<span id="L3093" class="LineNr">3093 </span><span class="muScenario">scenario</span> editor-scrolls-down-on-right-arrow-2 [ +<span id="L3094" class="LineNr">3094 </span> <span class="Constant">local-scope</span> +<span id="L3095" class="LineNr">3095 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3096" class="LineNr">3096 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<span id="L3097" class="LineNr">3097 </span> <span class="Comment"># editor contains more lines than can fit on screen</span> +<span id="L3098" class="LineNr">3098 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3099" class="LineNr">3099 </span><span class="Constant">b</span> +<span id="L3100" class="LineNr">3100 </span><span class="Constant">c</span> +<span id="L3101" class="LineNr">3101 </span><span class="Constant">d]</span> +<span id="L3102" class="LineNr">3102 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3103" class="LineNr">3103 </span> <span class="Comment"># position cursor at end of screen and try to move right</span> +<span id="L3104" class="LineNr">3104 </span> assume-console [ +<span id="L3105" class="LineNr">3105 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 3</span> +<span id="L3106" class="LineNr">3106 </span> press right-arrow +<span id="L3107" class="LineNr">3107 </span> ] +<span id="L3108" class="LineNr">3108 </span> run [ +<span id="L3109" class="LineNr">3109 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3110" class="LineNr">3110 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L3111" class="LineNr">3111 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L3112" class="LineNr">3112 </span> ] +<span id="L3113" class="LineNr">3113 </span> <span class="Comment"># screen scrolls</span> +<span id="L3114" class="LineNr">3114 </span> screen-should-contain [ +<span id="L3115" class="LineNr">3115 </span> <span class="Constant"> . .</span> +<span id="L3116" class="LineNr">3116 </span> <span class="Constant"> .b .</span> +<span id="L3117" class="LineNr">3117 </span> <span class="Constant"> .c .</span> +<span id="L3118" class="LineNr">3118 </span> <span class="Constant"> .d .</span> +<span id="L3119" class="LineNr">3119 </span> ] +<span id="L3120" class="LineNr">3120 </span> memory-should-contain [ +<span id="L3121" class="LineNr">3121 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L3122" class="LineNr">3122 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<span id="L3123" class="LineNr">3123 </span> ] +<span id="L3124" class="LineNr">3124 </span>] +<span id="L3125" class="LineNr">3125 </span> +<span id="L3126" class="LineNr">3126 </span><span class="muScenario">scenario</span> editor-scrolls-at-end-on-down-arrow [ +<span id="L3127" class="LineNr">3127 </span> <span class="Constant">local-scope</span> +<span id="L3128" class="LineNr">3128 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L3129" class="LineNr">3129 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abc</span> +<span id="L3130" class="LineNr">3130 </span><span class="Constant">de]</span> +<span id="L3131" class="LineNr">3131 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3132" class="LineNr">3132 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3133" class="LineNr">3133 </span> $clear-trace +<span id="L3134" class="LineNr">3134 </span> <span class="Comment"># try to move down past end of text</span> +<span id="L3135" class="LineNr">3135 </span> assume-console [ +<span id="L3136" class="LineNr">3136 </span> left-click<span class="Constant"> 2</span>,<span class="Constant"> 0</span> +<span id="L3137" class="LineNr">3137 </span> press down-arrow +<span id="L3138" class="LineNr">3138 </span> ] +<span id="L3139" class="LineNr">3139 </span> run [ +<span id="L3140" class="LineNr">3140 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3141" class="LineNr">3141 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L3142" class="LineNr">3142 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L3143" class="LineNr">3143 </span> ] +<span id="L3144" class="LineNr">3144 </span> <span class="Comment"># no change</span> +<span id="L3145" class="LineNr">3145 </span> memory-should-contain [ +<span id="L3146" class="LineNr">3146 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 2</span> +<span id="L3147" class="LineNr">3147 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> +<span id="L3148" class="LineNr">3148 </span> ] +<span id="L3149" class="LineNr">3149 </span>] +<span id="L3150" class="LineNr">3150 </span> +<span id="L3151" class="LineNr">3151 </span><span class="muScenario">scenario</span> editor-combines-page-and-line-scroll [ +<span id="L3152" class="LineNr">3152 </span> <span class="Constant">local-scope</span> +<span id="L3153" class="LineNr">3153 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3154" class="LineNr">3154 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3155" class="LineNr">3155 </span> <span class="Comment"># initialize editor with a few pages of lines</span> +<span id="L3156" class="LineNr">3156 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3157" class="LineNr">3157 </span><span class="Constant">b</span> +<span id="L3158" class="LineNr">3158 </span><span class="Constant">c</span> +<span id="L3159" class="LineNr">3159 </span><span class="Constant">d</span> +<span id="L3160" class="LineNr">3160 </span><span class="Constant">e</span> +<span id="L3161" class="LineNr">3161 </span><span class="Constant">f</span> +<span id="L3162" class="LineNr">3162 </span><span class="Constant">g]</span> +<span id="L3163" class="LineNr">3163 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3164" class="LineNr">3164 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3165" class="LineNr">3165 </span> <span class="Comment"># scroll down one page and one line</span> +<span id="L3166" class="LineNr">3166 </span> assume-console [ +<span id="L3167" class="LineNr">3167 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3168" class="LineNr">3168 </span> left-click<span class="Constant"> 3</span>,<span class="Constant"> 0</span> +<span id="L3169" class="LineNr">3169 </span> press down-arrow +<span id="L3170" class="LineNr">3170 </span> ] +<span id="L3171" class="LineNr">3171 </span> run [ +<span id="L3172" class="LineNr">3172 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3173" class="LineNr">3173 </span> ] +<span id="L3174" class="LineNr">3174 </span> <span class="Comment"># screen scrolls down 3 lines</span> +<span id="L3175" class="LineNr">3175 </span> screen-should-contain [ +<span id="L3176" class="LineNr">3176 </span> <span class="Constant"> . .</span> +<span id="L3177" class="LineNr">3177 </span> <span class="Constant"> .d .</span> +<span id="L3178" class="LineNr">3178 </span> <span class="Constant"> .e .</span> +<span id="L3179" class="LineNr">3179 </span> <span class="Constant"> .f .</span> +<span id="L3180" class="LineNr">3180 </span> ] +<span id="L3181" class="LineNr">3181 </span>] +<span id="L3182" class="LineNr">3182 </span> +<span id="L3183" class="LineNr">3183 </span><span class="Comment"># scroll up if necessary</span> +<span id="L3184" class="LineNr">3184 </span> +<span id="L3185" class="LineNr">3185 </span><span class="muScenario">scenario</span> editor-can-scroll-up-using-arrow-keys [ +<span id="L3186" class="LineNr">3186 </span> <span class="Constant">local-scope</span> +<span id="L3187" class="LineNr">3187 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3188" class="LineNr">3188 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3189" class="LineNr">3189 </span> <span class="Comment"># initialize editor with >3 lines</span> +<span id="L3190" class="LineNr">3190 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3191" class="LineNr">3191 </span><span class="Constant">b</span> +<span id="L3192" class="LineNr">3192 </span><span class="Constant">c</span> +<span id="L3193" class="LineNr">3193 </span><span class="Constant">d]</span> +<span id="L3194" class="LineNr">3194 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3195" class="LineNr">3195 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3196" class="LineNr">3196 </span> screen-should-contain [ +<span id="L3197" class="LineNr">3197 </span> <span class="Constant"> . .</span> +<span id="L3198" class="LineNr">3198 </span> <span class="Constant"> .a .</span> +<span id="L3199" class="LineNr">3199 </span> <span class="Constant"> .b .</span> +<span id="L3200" class="LineNr">3200 </span> <span class="Constant"> .c .</span> +<span id="L3201" class="LineNr">3201 </span> ] +<span id="L3202" class="LineNr">3202 </span> <span class="Comment"># position cursor at top of second page, then try to move up</span> +<span id="L3203" class="LineNr">3203 </span> assume-console [ +<span id="L3204" class="LineNr">3204 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3205" class="LineNr">3205 </span> press up-arrow +<span id="L3206" class="LineNr">3206 </span> ] +<span id="L3207" class="LineNr">3207 </span> run [ +<span id="L3208" class="LineNr">3208 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3209" class="LineNr">3209 </span> ] +<span id="L3210" class="LineNr">3210 </span> <span class="Comment"># screen slides by one line</span> +<span id="L3211" class="LineNr">3211 </span> screen-should-contain [ +<span id="L3212" class="LineNr">3212 </span> <span class="Constant"> . .</span> +<span id="L3213" class="LineNr">3213 </span> <span class="Constant"> .b .</span> +<span id="L3214" class="LineNr">3214 </span> <span class="Constant"> .c .</span> +<span id="L3215" class="LineNr">3215 </span> <span class="Constant"> .d .</span> +<span id="L3216" class="LineNr">3216 </span> ] +<span id="L3217" class="LineNr">3217 </span>] +<span id="L3218" class="LineNr">3218 </span> +<span id="L3219" class="LineNr">3219 </span><span class="muRecipe">after</span> <span class="Constant"><scroll-up></span> [ +<span id="L3220" class="LineNr">3220 </span> trace<span class="Constant"> 10</span>, <span class="Constant">[app]</span>, <span class="Constant">[scroll up]</span> +<span id="L3221" class="LineNr">3221 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3222" class="LineNr">3222 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy top-of-screen +<span id="L3223" class="LineNr">3223 </span> top-of-screen <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> top-of-screen, editor +<span id="L3224" class="LineNr">3224 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen +<span id="L3225" class="LineNr">3225 </span> no-movement?:bool <span class="Special"><-</span> equal old-top, top-of-screen +<span id="L3226" class="LineNr">3226 </span> <span class="muControl">return-if</span> no-movement?,<span class="Constant"> false/don't-render</span> +<span id="L3227" class="LineNr">3227 </span>] +<span id="L3228" class="LineNr">3228 </span> +<span id="L3229" class="LineNr">3229 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys [ +<span id="L3230" class="LineNr">3230 </span> <span class="Constant">local-scope</span> +<span id="L3231" class="LineNr">3231 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3232" class="LineNr">3232 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3233" class="LineNr">3233 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> +<span id="L3234" class="LineNr">3234 </span> <span class="Comment"># other lines</span> +<span id="L3235" class="LineNr">3235 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<span id="L3236" class="LineNr">3236 </span><span class="Constant">g</span> +<span id="L3237" class="LineNr">3237 </span><span class="Constant">h</span> +<span id="L3238" class="LineNr">3238 </span><span class="Constant">i]</span> +<span id="L3239" class="LineNr">3239 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3240" class="LineNr">3240 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e <span id="L3241" class="LineNr">3241 </span> screen-should-contain [ <span id="L3242" class="LineNr">3242 </span> <span class="Constant"> . .</span> -<span id="L3243" class="LineNr">3243 </span> <span class="Constant"> .g .</span> -<span id="L3244" class="LineNr">3244 </span> <span class="Constant"> .h .</span> -<span id="L3245" class="LineNr">3245 </span> <span class="Constant"> .i .</span> +<span id="L3243" class="LineNr">3243 </span> <span class="Constant"> .abcd↩ .</span> +<span id="L3244" class="LineNr">3244 </span> <span class="Constant"> .ef .</span> +<span id="L3245" class="LineNr">3245 </span> <span class="Constant"> .g .</span> <span id="L3246" class="LineNr">3246 </span> ] -<span id="L3247" class="LineNr">3247 </span> <span class="Comment"># now move up one line</span> +<span id="L3247" class="LineNr">3247 </span> <span class="Comment"># position cursor at top of second page, just below wrapped line</span> <span id="L3248" class="LineNr">3248 </span> assume-console [ -<span id="L3249" class="LineNr">3249 </span> press up-arrow +<span id="L3249" class="LineNr">3249 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> <span id="L3250" class="LineNr">3250 </span> ] <span id="L3251" class="LineNr">3251 </span> run [ <span id="L3252" class="LineNr">3252 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e <span id="L3253" class="LineNr">3253 </span> ] -<span id="L3254" class="LineNr">3254 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L3255" class="LineNr">3255 </span> screen-should-contain [ -<span id="L3256" class="LineNr">3256 </span> <span class="Constant"> . .</span> -<span id="L3257" class="LineNr">3257 </span> <span class="Constant"> .ef .</span> -<span id="L3258" class="LineNr">3258 </span> <span class="Constant"> .g .</span> -<span id="L3259" class="LineNr">3259 </span> <span class="Constant"> .h .</span> -<span id="L3260" class="LineNr">3260 </span> ] -<span id="L3261" class="LineNr">3261 </span>] -<span id="L3262" class="LineNr">3262 </span> -<span id="L3263" class="LineNr">3263 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-2 [ -<span id="L3264" class="LineNr">3264 </span> <span class="Constant">local-scope</span> -<span id="L3265" class="LineNr">3265 </span> <span class="Comment"># screen has 1 line for menu + 4 lines</span> -<span id="L3266" class="LineNr">3266 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L3267" class="LineNr">3267 </span> <span class="Comment"># editor starts with a long line wrapping twice, occupying 3 of the 4 lines</span> -<span id="L3268" class="LineNr">3268 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> -<span id="L3269" class="LineNr">3269 </span><span class="Constant">k</span> -<span id="L3270" class="LineNr">3270 </span><span class="Constant">l</span> -<span id="L3271" class="LineNr">3271 </span><span class="Constant">m]</span> -<span id="L3272" class="LineNr">3272 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3273" class="LineNr">3273 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3274" class="LineNr">3274 </span> <span class="Comment"># position cursor at top of second page</span> -<span id="L3275" class="LineNr">3275 </span> assume-console [ -<span id="L3276" class="LineNr">3276 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3277" class="LineNr">3277 </span> ] -<span id="L3278" class="LineNr">3278 </span> run [ -<span id="L3279" class="LineNr">3279 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3280" class="LineNr">3280 </span> ] -<span id="L3281" class="LineNr">3281 </span> screen-should-contain [ -<span id="L3282" class="LineNr">3282 </span> <span class="Constant"> . .</span> -<span id="L3283" class="LineNr">3283 </span> <span class="Constant"> .k .</span> -<span id="L3284" class="LineNr">3284 </span> <span class="Constant"> .l .</span> -<span id="L3285" class="LineNr">3285 </span> <span class="Constant"> .m .</span> -<span id="L3286" class="LineNr">3286 </span> <span class="Constant"> .╌╌╌╌╌ .</span> -<span id="L3287" class="LineNr">3287 </span> ] -<span id="L3288" class="LineNr">3288 </span> <span class="Comment"># move up one line</span> -<span id="L3289" class="LineNr">3289 </span> assume-console [ -<span id="L3290" class="LineNr">3290 </span> press up-arrow -<span id="L3291" class="LineNr">3291 </span> ] -<span id="L3292" class="LineNr">3292 </span> run [ -<span id="L3293" class="LineNr">3293 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3294" class="LineNr">3294 </span> ] -<span id="L3295" class="LineNr">3295 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L3296" class="LineNr">3296 </span> screen-should-contain [ -<span id="L3297" class="LineNr">3297 </span> <span class="Constant"> . .</span> -<span id="L3298" class="LineNr">3298 </span> <span class="Constant"> .ij .</span> -<span id="L3299" class="LineNr">3299 </span> <span class="Constant"> .k .</span> -<span id="L3300" class="LineNr">3300 </span> <span class="Constant"> .l .</span> -<span id="L3301" class="LineNr">3301 </span> <span class="Constant"> .m .</span> -<span id="L3302" class="LineNr">3302 </span> ] -<span id="L3303" class="LineNr">3303 </span> <span class="Comment"># move up a second line</span> -<span id="L3304" class="LineNr">3304 </span> assume-console [ -<span id="L3305" class="LineNr">3305 </span> press up-arrow -<span id="L3306" class="LineNr">3306 </span> ] -<span id="L3307" class="LineNr">3307 </span> run [ -<span id="L3308" class="LineNr">3308 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3309" class="LineNr">3309 </span> ] -<span id="L3310" class="LineNr">3310 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L3311" class="LineNr">3311 </span> screen-should-contain [ -<span id="L3312" class="LineNr">3312 </span> <span class="Constant"> . .</span> -<span id="L3313" class="LineNr">3313 </span> <span class="Constant"> .efgh↩ .</span> -<span id="L3314" class="LineNr">3314 </span> <span class="Constant"> .ij .</span> -<span id="L3315" class="LineNr">3315 </span> <span class="Constant"> .k .</span> -<span id="L3316" class="LineNr">3316 </span> <span class="Constant"> .l .</span> -<span id="L3317" class="LineNr">3317 </span> ] -<span id="L3318" class="LineNr">3318 </span> <span class="Comment"># move up a third line</span> -<span id="L3319" class="LineNr">3319 </span> assume-console [ -<span id="L3320" class="LineNr">3320 </span> press up-arrow -<span id="L3321" class="LineNr">3321 </span> ] -<span id="L3322" class="LineNr">3322 </span> run [ -<span id="L3323" class="LineNr">3323 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3324" class="LineNr">3324 </span> ] -<span id="L3325" class="LineNr">3325 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L3326" class="LineNr">3326 </span> screen-should-contain [ -<span id="L3327" class="LineNr">3327 </span> <span class="Constant"> . .</span> -<span id="L3328" class="LineNr">3328 </span> <span class="Constant"> .abcd↩ .</span> -<span id="L3329" class="LineNr">3329 </span> <span class="Constant"> .efgh↩ .</span> -<span id="L3330" class="LineNr">3330 </span> <span class="Constant"> .ij .</span> -<span id="L3331" class="LineNr">3331 </span> <span class="Constant"> .k .</span> -<span id="L3332" class="LineNr">3332 </span> ] -<span id="L3333" class="LineNr">3333 </span>] -<span id="L3334" class="LineNr">3334 </span> -<span id="L3335" class="LineNr">3335 </span><span class="Comment"># same as editor-scrolls-up-past-wrapped-line-using-arrow-keys but length</span> -<span id="L3336" class="LineNr">3336 </span><span class="Comment"># slightly off, just to prevent over-training</span> -<span id="L3337" class="LineNr">3337 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-3 [ -<span id="L3338" class="LineNr">3338 </span> <span class="Constant">local-scope</span> -<span id="L3339" class="LineNr">3339 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3340" class="LineNr">3340 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3341" class="LineNr">3341 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> -<span id="L3342" class="LineNr">3342 </span> <span class="Comment"># other lines</span> -<span id="L3343" class="LineNr">3343 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> -<span id="L3344" class="LineNr">3344 </span><span class="Constant">g</span> -<span id="L3345" class="LineNr">3345 </span><span class="Constant">h</span> -<span id="L3346" class="LineNr">3346 </span><span class="Constant">i]</span> -<span id="L3347" class="LineNr">3347 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> -<span id="L3348" class="LineNr">3348 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3349" class="LineNr">3349 </span> screen-should-contain [ -<span id="L3350" class="LineNr">3350 </span> <span class="Constant"> . .</span> -<span id="L3351" class="LineNr">3351 </span> <span class="Constant"> .abcde↩ .</span> -<span id="L3352" class="LineNr">3352 </span> <span class="Constant"> .f .</span> -<span id="L3353" class="LineNr">3353 </span> <span class="Constant"> .g .</span> -<span id="L3354" class="LineNr">3354 </span> ] -<span id="L3355" class="LineNr">3355 </span> <span class="Comment"># position cursor at top of second page, just below wrapped line</span> -<span id="L3356" class="LineNr">3356 </span> assume-console [ -<span id="L3357" class="LineNr">3357 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3358" class="LineNr">3358 </span> ] -<span id="L3359" class="LineNr">3359 </span> run [ -<span id="L3360" class="LineNr">3360 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3361" class="LineNr">3361 </span> ] +<span id="L3254" class="LineNr">3254 </span> screen-should-contain [ +<span id="L3255" class="LineNr">3255 </span> <span class="Constant"> . .</span> +<span id="L3256" class="LineNr">3256 </span> <span class="Constant"> .g .</span> +<span id="L3257" class="LineNr">3257 </span> <span class="Constant"> .h .</span> +<span id="L3258" class="LineNr">3258 </span> <span class="Constant"> .i .</span> +<span id="L3259" class="LineNr">3259 </span> ] +<span id="L3260" class="LineNr">3260 </span> <span class="Comment"># now move up one line</span> +<span id="L3261" class="LineNr">3261 </span> assume-console [ +<span id="L3262" class="LineNr">3262 </span> press up-arrow +<span id="L3263" class="LineNr">3263 </span> ] +<span id="L3264" class="LineNr">3264 </span> run [ +<span id="L3265" class="LineNr">3265 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3266" class="LineNr">3266 </span> ] +<span id="L3267" class="LineNr">3267 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L3268" class="LineNr">3268 </span> screen-should-contain [ +<span id="L3269" class="LineNr">3269 </span> <span class="Constant"> . .</span> +<span id="L3270" class="LineNr">3270 </span> <span class="Constant"> .ef .</span> +<span id="L3271" class="LineNr">3271 </span> <span class="Constant"> .g .</span> +<span id="L3272" class="LineNr">3272 </span> <span class="Constant"> .h .</span> +<span id="L3273" class="LineNr">3273 </span> ] +<span id="L3274" class="LineNr">3274 </span>] +<span id="L3275" class="LineNr">3275 </span> +<span id="L3276" class="LineNr">3276 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-2 [ +<span id="L3277" class="LineNr">3277 </span> <span class="Constant">local-scope</span> +<span id="L3278" class="LineNr">3278 </span> <span class="Comment"># screen has 1 line for menu + 4 lines</span> +<span id="L3279" class="LineNr">3279 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L3280" class="LineNr">3280 </span> <span class="Comment"># editor starts with a long line wrapping twice, occupying 3 of the 4 lines</span> +<span id="L3281" class="LineNr">3281 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdefghij</span> +<span id="L3282" class="LineNr">3282 </span><span class="Constant">k</span> +<span id="L3283" class="LineNr">3283 </span><span class="Constant">l</span> +<span id="L3284" class="LineNr">3284 </span><span class="Constant">m]</span> +<span id="L3285" class="LineNr">3285 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3286" class="LineNr">3286 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3287" class="LineNr">3287 </span> <span class="Comment"># position cursor at top of second page</span> +<span id="L3288" class="LineNr">3288 </span> assume-console [ +<span id="L3289" class="LineNr">3289 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3290" class="LineNr">3290 </span> ] +<span id="L3291" class="LineNr">3291 </span> run [ +<span id="L3292" class="LineNr">3292 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3293" class="LineNr">3293 </span> ] +<span id="L3294" class="LineNr">3294 </span> screen-should-contain [ +<span id="L3295" class="LineNr">3295 </span> <span class="Constant"> . .</span> +<span id="L3296" class="LineNr">3296 </span> <span class="Constant"> .k .</span> +<span id="L3297" class="LineNr">3297 </span> <span class="Constant"> .l .</span> +<span id="L3298" class="LineNr">3298 </span> <span class="Constant"> .m .</span> +<span id="L3299" class="LineNr">3299 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<span id="L3300" class="LineNr">3300 </span> ] +<span id="L3301" class="LineNr">3301 </span> <span class="Comment"># move up one line</span> +<span id="L3302" class="LineNr">3302 </span> assume-console [ +<span id="L3303" class="LineNr">3303 </span> press up-arrow +<span id="L3304" class="LineNr">3304 </span> ] +<span id="L3305" class="LineNr">3305 </span> run [ +<span id="L3306" class="LineNr">3306 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3307" class="LineNr">3307 </span> ] +<span id="L3308" class="LineNr">3308 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L3309" class="LineNr">3309 </span> screen-should-contain [ +<span id="L3310" class="LineNr">3310 </span> <span class="Constant"> . .</span> +<span id="L3311" class="LineNr">3311 </span> <span class="Constant"> .ij .</span> +<span id="L3312" class="LineNr">3312 </span> <span class="Constant"> .k .</span> +<span id="L3313" class="LineNr">3313 </span> <span class="Constant"> .l .</span> +<span id="L3314" class="LineNr">3314 </span> <span class="Constant"> .m .</span> +<span id="L3315" class="LineNr">3315 </span> ] +<span id="L3316" class="LineNr">3316 </span> <span class="Comment"># move up a second line</span> +<span id="L3317" class="LineNr">3317 </span> assume-console [ +<span id="L3318" class="LineNr">3318 </span> press up-arrow +<span id="L3319" class="LineNr">3319 </span> ] +<span id="L3320" class="LineNr">3320 </span> run [ +<span id="L3321" class="LineNr">3321 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3322" class="LineNr">3322 </span> ] +<span id="L3323" class="LineNr">3323 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L3324" class="LineNr">3324 </span> screen-should-contain [ +<span id="L3325" class="LineNr">3325 </span> <span class="Constant"> . .</span> +<span id="L3326" class="LineNr">3326 </span> <span class="Constant"> .efgh↩ .</span> +<span id="L3327" class="LineNr">3327 </span> <span class="Constant"> .ij .</span> +<span id="L3328" class="LineNr">3328 </span> <span class="Constant"> .k .</span> +<span id="L3329" class="LineNr">3329 </span> <span class="Constant"> .l .</span> +<span id="L3330" class="LineNr">3330 </span> ] +<span id="L3331" class="LineNr">3331 </span> <span class="Comment"># move up a third line</span> +<span id="L3332" class="LineNr">3332 </span> assume-console [ +<span id="L3333" class="LineNr">3333 </span> press up-arrow +<span id="L3334" class="LineNr">3334 </span> ] +<span id="L3335" class="LineNr">3335 </span> run [ +<span id="L3336" class="LineNr">3336 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3337" class="LineNr">3337 </span> ] +<span id="L3338" class="LineNr">3338 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L3339" class="LineNr">3339 </span> screen-should-contain [ +<span id="L3340" class="LineNr">3340 </span> <span class="Constant"> . .</span> +<span id="L3341" class="LineNr">3341 </span> <span class="Constant"> .abcd↩ .</span> +<span id="L3342" class="LineNr">3342 </span> <span class="Constant"> .efgh↩ .</span> +<span id="L3343" class="LineNr">3343 </span> <span class="Constant"> .ij .</span> +<span id="L3344" class="LineNr">3344 </span> <span class="Constant"> .k .</span> +<span id="L3345" class="LineNr">3345 </span> ] +<span id="L3346" class="LineNr">3346 </span>] +<span id="L3347" class="LineNr">3347 </span> +<span id="L3348" class="LineNr">3348 </span><span class="Comment"># same as editor-scrolls-up-past-wrapped-line-using-arrow-keys but length</span> +<span id="L3349" class="LineNr">3349 </span><span class="Comment"># slightly off, just to prevent over-training</span> +<span id="L3350" class="LineNr">3350 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-3 [ +<span id="L3351" class="LineNr">3351 </span> <span class="Constant">local-scope</span> +<span id="L3352" class="LineNr">3352 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3353" class="LineNr">3353 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3354" class="LineNr">3354 </span> <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span> +<span id="L3355" class="LineNr">3355 </span> <span class="Comment"># other lines</span> +<span id="L3356" class="LineNr">3356 </span> s:text <span class="Special"><-</span> new <span class="Constant">[abcdef</span> +<span id="L3357" class="LineNr">3357 </span><span class="Constant">g</span> +<span id="L3358" class="LineNr">3358 </span><span class="Constant">h</span> +<span id="L3359" class="LineNr">3359 </span><span class="Constant">i]</span> +<span id="L3360" class="LineNr">3360 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> +<span id="L3361" class="LineNr">3361 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e <span id="L3362" class="LineNr">3362 </span> screen-should-contain [ <span id="L3363" class="LineNr">3363 </span> <span class="Constant"> . .</span> -<span id="L3364" class="LineNr">3364 </span> <span class="Constant"> .g .</span> -<span id="L3365" class="LineNr">3365 </span> <span class="Constant"> .h .</span> -<span id="L3366" class="LineNr">3366 </span> <span class="Constant"> .i .</span> +<span id="L3364" class="LineNr">3364 </span> <span class="Constant"> .abcde↩ .</span> +<span id="L3365" class="LineNr">3365 </span> <span class="Constant"> .f .</span> +<span id="L3366" class="LineNr">3366 </span> <span class="Constant"> .g .</span> <span id="L3367" class="LineNr">3367 </span> ] -<span id="L3368" class="LineNr">3368 </span> <span class="Comment"># now move up one line</span> +<span id="L3368" class="LineNr">3368 </span> <span class="Comment"># position cursor at top of second page, just below wrapped line</span> <span id="L3369" class="LineNr">3369 </span> assume-console [ -<span id="L3370" class="LineNr">3370 </span> press up-arrow +<span id="L3370" class="LineNr">3370 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> <span id="L3371" class="LineNr">3371 </span> ] <span id="L3372" class="LineNr">3372 </span> run [ <span id="L3373" class="LineNr">3373 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e <span id="L3374" class="LineNr">3374 </span> ] -<span id="L3375" class="LineNr">3375 </span> <span class="Comment"># screen shows partial wrapped line</span> -<span id="L3376" class="LineNr">3376 </span> screen-should-contain [ -<span id="L3377" class="LineNr">3377 </span> <span class="Constant"> . .</span> -<span id="L3378" class="LineNr">3378 </span> <span class="Constant"> .f .</span> -<span id="L3379" class="LineNr">3379 </span> <span class="Constant"> .g .</span> -<span id="L3380" class="LineNr">3380 </span> <span class="Constant"> .h .</span> -<span id="L3381" class="LineNr">3381 </span> ] -<span id="L3382" class="LineNr">3382 </span>] -<span id="L3383" class="LineNr">3383 </span> -<span id="L3384" class="LineNr">3384 </span><span class="Comment"># check empty lines</span> -<span id="L3385" class="LineNr">3385 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-4 [ -<span id="L3386" class="LineNr">3386 </span> <span class="Constant">local-scope</span> -<span id="L3387" class="LineNr">3387 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3388" class="LineNr">3388 </span> <span class="Comment"># initialize editor with some lines around an empty line</span> -<span id="L3389" class="LineNr">3389 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3390" class="LineNr">3390 </span><span class="Constant">b</span> -<span id="L3391" class="LineNr">3391 </span> -<span id="L3392" class="LineNr">3392 </span>c -<span id="L3393" class="LineNr">3393 </span>d -<span id="L3394" class="LineNr">3394 </span>e] -<span id="L3395" class="LineNr">3395 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> -<span id="L3396" class="LineNr">3396 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3397" class="LineNr">3397 </span> assume-console [ -<span id="L3398" class="LineNr">3398 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3399" class="LineNr">3399 </span> ] -<span id="L3400" class="LineNr">3400 </span> run [ -<span id="L3401" class="LineNr">3401 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3402" class="LineNr">3402 </span> ] -<span id="L3403" class="LineNr">3403 </span> screen-should-contain [ -<span id="L3404" class="LineNr">3404 </span> <span class="Constant"> . .</span> -<span id="L3405" class="LineNr">3405 </span> <span class="Constant"> . .</span> -<span id="L3406" class="LineNr">3406 </span> <span class="Constant"> .c .</span> -<span id="L3407" class="LineNr">3407 </span> <span class="Constant"> .d .</span> -<span id="L3408" class="LineNr">3408 </span> ] -<span id="L3409" class="LineNr">3409 </span> assume-console [ -<span id="L3410" class="LineNr">3410 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3411" class="LineNr">3411 </span> ] -<span id="L3412" class="LineNr">3412 </span> run [ -<span id="L3413" class="LineNr">3413 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3414" class="LineNr">3414 </span> ] -<span id="L3415" class="LineNr">3415 </span> screen-should-contain [ -<span id="L3416" class="LineNr">3416 </span> <span class="Constant"> . .</span> -<span id="L3417" class="LineNr">3417 </span> <span class="Constant"> .d .</span> -<span id="L3418" class="LineNr">3418 </span> <span class="Constant"> .e .</span> -<span id="L3419" class="LineNr">3419 </span> <span class="Constant"> .╌╌╌╌╌╌ .</span> -<span id="L3420" class="LineNr">3420 </span> ] -<span id="L3421" class="LineNr">3421 </span> assume-console [ -<span id="L3422" class="LineNr">3422 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> -<span id="L3423" class="LineNr">3423 </span> ] -<span id="L3424" class="LineNr">3424 </span> run [ -<span id="L3425" class="LineNr">3425 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3426" class="LineNr">3426 </span> ] -<span id="L3427" class="LineNr">3427 </span> screen-should-contain [ -<span id="L3428" class="LineNr">3428 </span> <span class="Constant"> . .</span> +<span id="L3375" class="LineNr">3375 </span> screen-should-contain [ +<span id="L3376" class="LineNr">3376 </span> <span class="Constant"> . .</span> +<span id="L3377" class="LineNr">3377 </span> <span class="Constant"> .g .</span> +<span id="L3378" class="LineNr">3378 </span> <span class="Constant"> .h .</span> +<span id="L3379" class="LineNr">3379 </span> <span class="Constant"> .i .</span> +<span id="L3380" class="LineNr">3380 </span> ] +<span id="L3381" class="LineNr">3381 </span> <span class="Comment"># now move up one line</span> +<span id="L3382" class="LineNr">3382 </span> assume-console [ +<span id="L3383" class="LineNr">3383 </span> press up-arrow +<span id="L3384" class="LineNr">3384 </span> ] +<span id="L3385" class="LineNr">3385 </span> run [ +<span id="L3386" class="LineNr">3386 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3387" class="LineNr">3387 </span> ] +<span id="L3388" class="LineNr">3388 </span> <span class="Comment"># screen shows partial wrapped line</span> +<span id="L3389" class="LineNr">3389 </span> screen-should-contain [ +<span id="L3390" class="LineNr">3390 </span> <span class="Constant"> . .</span> +<span id="L3391" class="LineNr">3391 </span> <span class="Constant"> .f .</span> +<span id="L3392" class="LineNr">3392 </span> <span class="Constant"> .g .</span> +<span id="L3393" class="LineNr">3393 </span> <span class="Constant"> .h .</span> +<span id="L3394" class="LineNr">3394 </span> ] +<span id="L3395" class="LineNr">3395 </span>] +<span id="L3396" class="LineNr">3396 </span> +<span id="L3397" class="LineNr">3397 </span><span class="Comment"># check empty lines</span> +<span id="L3398" class="LineNr">3398 </span><span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-4 [ +<span id="L3399" class="LineNr">3399 </span> <span class="Constant">local-scope</span> +<span id="L3400" class="LineNr">3400 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3401" class="LineNr">3401 </span> <span class="Comment"># initialize editor with some lines around an empty line</span> +<span id="L3402" class="LineNr">3402 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3403" class="LineNr">3403 </span><span class="Constant">b</span> +<span id="L3404" class="LineNr">3404 </span> +<span id="L3405" class="LineNr">3405 </span>c +<span id="L3406" class="LineNr">3406 </span>d +<span id="L3407" class="LineNr">3407 </span>e] +<span id="L3408" class="LineNr">3408 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">6/right</span> +<span id="L3409" class="LineNr">3409 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3410" class="LineNr">3410 </span> assume-console [ +<span id="L3411" class="LineNr">3411 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3412" class="LineNr">3412 </span> ] +<span id="L3413" class="LineNr">3413 </span> run [ +<span id="L3414" class="LineNr">3414 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3415" class="LineNr">3415 </span> ] +<span id="L3416" class="LineNr">3416 </span> screen-should-contain [ +<span id="L3417" class="LineNr">3417 </span> <span class="Constant"> . .</span> +<span id="L3418" class="LineNr">3418 </span> <span class="Constant"> . .</span> +<span id="L3419" class="LineNr">3419 </span> <span class="Constant"> .c .</span> +<span id="L3420" class="LineNr">3420 </span> <span class="Constant"> .d .</span> +<span id="L3421" class="LineNr">3421 </span> ] +<span id="L3422" class="LineNr">3422 </span> assume-console [ +<span id="L3423" class="LineNr">3423 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3424" class="LineNr">3424 </span> ] +<span id="L3425" class="LineNr">3425 </span> run [ +<span id="L3426" class="LineNr">3426 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3427" class="LineNr">3427 </span> ] +<span id="L3428" class="LineNr">3428 </span> screen-should-contain [ <span id="L3429" class="LineNr">3429 </span> <span class="Constant"> . .</span> -<span id="L3430" class="LineNr">3430 </span> <span class="Constant"> .c .</span> -<span id="L3431" class="LineNr">3431 </span> <span class="Constant"> .d .</span> -<span id="L3432" class="LineNr">3432 </span> ] -<span id="L3433" class="LineNr">3433 </span>] -<span id="L3434" class="LineNr">3434 </span> -<span id="L3435" class="LineNr">3435 </span><span class="muScenario">scenario</span> editor-scrolls-up-on-left-arrow [ -<span id="L3436" class="LineNr">3436 </span> <span class="Constant">local-scope</span> -<span id="L3437" class="LineNr">3437 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3438" class="LineNr">3438 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> -<span id="L3439" class="LineNr">3439 </span> <span class="Comment"># editor contains >3 lines</span> -<span id="L3440" class="LineNr">3440 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3441" class="LineNr">3441 </span><span class="Constant">b</span> -<span id="L3442" class="LineNr">3442 </span><span class="Constant">c</span> -<span id="L3443" class="LineNr">3443 </span><span class="Constant">d</span> -<span id="L3444" class="LineNr">3444 </span><span class="Constant">e]</span> -<span id="L3445" class="LineNr">3445 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L3446" class="LineNr">3446 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3447" class="LineNr">3447 </span> <span class="Comment"># position cursor at top of second page</span> -<span id="L3448" class="LineNr">3448 </span> assume-console [ -<span id="L3449" class="LineNr">3449 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3450" class="LineNr">3450 </span> ] -<span id="L3451" class="LineNr">3451 </span> run [ -<span id="L3452" class="LineNr">3452 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3453" class="LineNr">3453 </span> ] -<span id="L3454" class="LineNr">3454 </span> screen-should-contain [ -<span id="L3455" class="LineNr">3455 </span> <span class="Constant"> . .</span> -<span id="L3456" class="LineNr">3456 </span> <span class="Constant"> .c .</span> -<span id="L3457" class="LineNr">3457 </span> <span class="Constant"> .d .</span> -<span id="L3458" class="LineNr">3458 </span> <span class="Constant"> .e .</span> -<span id="L3459" class="LineNr">3459 </span> ] -<span id="L3460" class="LineNr">3460 </span> <span class="Comment"># now try to move left</span> +<span id="L3430" class="LineNr">3430 </span> <span class="Constant"> .d .</span> +<span id="L3431" class="LineNr">3431 </span> <span class="Constant"> .e .</span> +<span id="L3432" class="LineNr">3432 </span> <span class="Constant"> .╌╌╌╌╌╌ .</span> +<span id="L3433" class="LineNr">3433 </span> ] +<span id="L3434" class="LineNr">3434 </span> assume-console [ +<span id="L3435" class="LineNr">3435 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L3436" class="LineNr">3436 </span> ] +<span id="L3437" class="LineNr">3437 </span> run [ +<span id="L3438" class="LineNr">3438 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3439" class="LineNr">3439 </span> ] +<span id="L3440" class="LineNr">3440 </span> screen-should-contain [ +<span id="L3441" class="LineNr">3441 </span> <span class="Constant"> . .</span> +<span id="L3442" class="LineNr">3442 </span> <span class="Constant"> . .</span> +<span id="L3443" class="LineNr">3443 </span> <span class="Constant"> .c .</span> +<span id="L3444" class="LineNr">3444 </span> <span class="Constant"> .d .</span> +<span id="L3445" class="LineNr">3445 </span> ] +<span id="L3446" class="LineNr">3446 </span>] +<span id="L3447" class="LineNr">3447 </span> +<span id="L3448" class="LineNr">3448 </span><span class="muScenario">scenario</span> editor-scrolls-up-on-left-arrow [ +<span id="L3449" class="LineNr">3449 </span> <span class="Constant">local-scope</span> +<span id="L3450" class="LineNr">3450 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3451" class="LineNr">3451 </span> assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span> +<span id="L3452" class="LineNr">3452 </span> <span class="Comment"># editor contains >3 lines</span> +<span id="L3453" class="LineNr">3453 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3454" class="LineNr">3454 </span><span class="Constant">b</span> +<span id="L3455" class="LineNr">3455 </span><span class="Constant">c</span> +<span id="L3456" class="LineNr">3456 </span><span class="Constant">d</span> +<span id="L3457" class="LineNr">3457 </span><span class="Constant">e]</span> +<span id="L3458" class="LineNr">3458 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L3459" class="LineNr">3459 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3460" class="LineNr">3460 </span> <span class="Comment"># position cursor at top of second page</span> <span id="L3461" class="LineNr">3461 </span> assume-console [ -<span id="L3462" class="LineNr">3462 </span> press left-arrow +<span id="L3462" class="LineNr">3462 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> <span id="L3463" class="LineNr">3463 </span> ] <span id="L3464" class="LineNr">3464 </span> run [ <span id="L3465" class="LineNr">3465 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3466" class="LineNr">3466 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L3467" class="LineNr">3467 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L3468" class="LineNr">3468 </span> ] -<span id="L3469" class="LineNr">3469 </span> <span class="Comment"># screen scrolls</span> -<span id="L3470" class="LineNr">3470 </span> screen-should-contain [ -<span id="L3471" class="LineNr">3471 </span> <span class="Constant"> . .</span> -<span id="L3472" class="LineNr">3472 </span> <span class="Constant"> .b .</span> -<span id="L3473" class="LineNr">3473 </span> <span class="Constant"> .c .</span> -<span id="L3474" class="LineNr">3474 </span> <span class="Constant"> .d .</span> -<span id="L3475" class="LineNr">3475 </span> ] -<span id="L3476" class="LineNr">3476 </span> memory-should-contain [ -<span id="L3477" class="LineNr">3477 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> -<span id="L3478" class="LineNr">3478 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> -<span id="L3479" class="LineNr">3479 </span> ] -<span id="L3480" class="LineNr">3480 </span>] -<span id="L3481" class="LineNr">3481 </span> -<span id="L3482" class="LineNr">3482 </span><span class="muScenario">scenario</span> editor-can-scroll-up-to-start-of-file [ -<span id="L3483" class="LineNr">3483 </span> <span class="Constant">local-scope</span> -<span id="L3484" class="LineNr">3484 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3485" class="LineNr">3485 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3486" class="LineNr">3486 </span> <span class="Comment"># initialize editor with >3 lines</span> -<span id="L3487" class="LineNr">3487 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3488" class="LineNr">3488 </span><span class="Constant">b</span> -<span id="L3489" class="LineNr">3489 </span><span class="Constant">c</span> -<span id="L3490" class="LineNr">3490 </span><span class="Constant">d]</span> -<span id="L3491" class="LineNr">3491 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3492" class="LineNr">3492 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3493" class="LineNr">3493 </span> screen-should-contain [ -<span id="L3494" class="LineNr">3494 </span> <span class="Constant"> . .</span> -<span id="L3495" class="LineNr">3495 </span> <span class="Constant"> .a .</span> -<span id="L3496" class="LineNr">3496 </span> <span class="Constant"> .b .</span> -<span id="L3497" class="LineNr">3497 </span> <span class="Constant"> .c .</span> -<span id="L3498" class="LineNr">3498 </span> ] -<span id="L3499" class="LineNr">3499 </span> <span class="Comment"># position cursor at top of second page, then try to move up to start of</span> -<span id="L3500" class="LineNr">3500 </span> <span class="Comment"># text</span> -<span id="L3501" class="LineNr">3501 </span> assume-console [ -<span id="L3502" class="LineNr">3502 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3503" class="LineNr">3503 </span> press up-arrow -<span id="L3504" class="LineNr">3504 </span> press up-arrow -<span id="L3505" class="LineNr">3505 </span> ] -<span id="L3506" class="LineNr">3506 </span> run [ -<span id="L3507" class="LineNr">3507 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3508" class="LineNr">3508 </span> ] -<span id="L3509" class="LineNr">3509 </span> <span class="Comment"># screen slides by one line</span> -<span id="L3510" class="LineNr">3510 </span> screen-should-contain [ -<span id="L3511" class="LineNr">3511 </span> <span class="Constant"> . .</span> -<span id="L3512" class="LineNr">3512 </span> <span class="Constant"> .a .</span> -<span id="L3513" class="LineNr">3513 </span> <span class="Constant"> .b .</span> -<span id="L3514" class="LineNr">3514 </span> <span class="Constant"> .c .</span> -<span id="L3515" class="LineNr">3515 </span> ] -<span id="L3516" class="LineNr">3516 </span> <span class="Comment"># try to move up again</span> -<span id="L3517" class="LineNr">3517 </span> assume-console [ -<span id="L3518" class="LineNr">3518 </span> press up-arrow -<span id="L3519" class="LineNr">3519 </span> ] -<span id="L3520" class="LineNr">3520 </span> run [ -<span id="L3521" class="LineNr">3521 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3522" class="LineNr">3522 </span> ] -<span id="L3523" class="LineNr">3523 </span> <span class="Comment"># screen remains unchanged</span> -<span id="L3524" class="LineNr">3524 </span> screen-should-contain [ -<span id="L3525" class="LineNr">3525 </span> <span class="Constant"> . .</span> -<span id="L3526" class="LineNr">3526 </span> <span class="Constant"> .a .</span> -<span id="L3527" class="LineNr">3527 </span> <span class="Constant"> .b .</span> -<span id="L3528" class="LineNr">3528 </span> <span class="Constant"> .c .</span> -<span id="L3529" class="LineNr">3529 </span> ] -<span id="L3530" class="LineNr">3530 </span>] -<span id="L3531" class="LineNr">3531 </span> -<span id="L3532" class="LineNr">3532 </span><span class="Comment"># ctrl-f/page-down - render next page if it exists</span> -<span id="L3533" class="LineNr">3533 </span> -<span id="L3534" class="LineNr">3534 </span><span class="muScenario">scenario</span> editor-can-scroll [ -<span id="L3535" class="LineNr">3535 </span> <span class="Constant">local-scope</span> -<span id="L3536" class="LineNr">3536 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3537" class="LineNr">3537 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3538" class="LineNr">3538 </span><span class="Constant">b</span> -<span id="L3539" class="LineNr">3539 </span><span class="Constant">c</span> -<span id="L3540" class="LineNr">3540 </span><span class="Constant">d]</span> -<span id="L3541" class="LineNr">3541 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3542" class="LineNr">3542 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3543" class="LineNr">3543 </span> screen-should-contain [ -<span id="L3544" class="LineNr">3544 </span> <span class="Constant"> . .</span> -<span id="L3545" class="LineNr">3545 </span> <span class="Constant"> .a .</span> -<span id="L3546" class="LineNr">3546 </span> <span class="Constant"> .b .</span> -<span id="L3547" class="LineNr">3547 </span> <span class="Constant"> .c .</span> -<span id="L3548" class="LineNr">3548 </span> ] -<span id="L3549" class="LineNr">3549 </span> <span class="Comment"># scroll down</span> -<span id="L3550" class="LineNr">3550 </span> assume-console [ -<span id="L3551" class="LineNr">3551 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3552" class="LineNr">3552 </span> ] -<span id="L3553" class="LineNr">3553 </span> run [ -<span id="L3554" class="LineNr">3554 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3555" class="LineNr">3555 </span> ] -<span id="L3556" class="LineNr">3556 </span> <span class="Comment"># screen shows next page</span> -<span id="L3557" class="LineNr">3557 </span> screen-should-contain [ -<span id="L3558" class="LineNr">3558 </span> <span class="Constant"> . .</span> -<span id="L3559" class="LineNr">3559 </span> <span class="Constant"> .c .</span> -<span id="L3560" class="LineNr">3560 </span> <span class="Constant"> .d .</span> -<span id="L3561" class="LineNr">3561 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L3562" class="LineNr">3562 </span> ] -<span id="L3563" class="LineNr">3563 </span>] -<span id="L3564" class="LineNr">3564 </span> -<span id="L3565" class="LineNr">3565 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ -<span id="L3566" class="LineNr">3566 </span> <span class="Delimiter">{</span> -<span id="L3567" class="LineNr">3567 </span> page-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">6/ctrl-f</span> -<span id="L3568" class="LineNr">3568 </span> <span class="muControl">break-unless</span> page-down? -<span id="L3569" class="LineNr">3569 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3570" class="LineNr">3570 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L3571" class="LineNr">3571 </span> <a href='003-shortcuts.mu.html#L3597'>page-down</a> editor -<span id="L3572" class="LineNr">3572 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span id="L3573" class="LineNr">3573 </span><span class="Constant"> <end-move-cursor></span> -<span id="L3574" class="LineNr">3574 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3575" class="LineNr">3575 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top -<span id="L3576" class="LineNr">3576 </span> <span class="muControl"> return</span> movement?/go-render -<span id="L3577" class="LineNr">3577 </span> <span class="Delimiter">}</span> -<span id="L3578" class="LineNr">3578 </span>] -<span id="L3579" class="LineNr">3579 </span> -<span id="L3580" class="LineNr">3580 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L199'><handle-special-key></a></span> [ -<span id="L3581" class="LineNr">3581 </span> <span class="Delimiter">{</span> -<span id="L3582" class="LineNr">3582 </span> page-down?:bool <span class="Special"><-</span> equal k, <span class="Constant">65518/page-down</span> -<span id="L3583" class="LineNr">3583 </span> <span class="muControl">break-unless</span> page-down? -<span id="L3584" class="LineNr">3584 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3585" class="LineNr">3585 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L3586" class="LineNr">3586 </span> <a href='003-shortcuts.mu.html#L3597'>page-down</a> editor -<span id="L3587" class="LineNr">3587 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span id="L3588" class="LineNr">3588 </span><span class="Constant"> <end-move-cursor></span> -<span id="L3589" class="LineNr">3589 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3590" class="LineNr">3590 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top -<span id="L3591" class="LineNr">3591 </span> <span class="muControl"> return</span> movement?/go-render -<span id="L3592" class="LineNr">3592 </span> <span class="Delimiter">}</span> -<span id="L3593" class="LineNr">3593 </span>] -<span id="L3594" class="LineNr">3594 </span> -<span id="L3595" class="LineNr">3595 </span><span class="Comment"># page-down skips entire wrapped lines, so it can't scroll past lines</span> -<span id="L3596" class="LineNr">3596 </span><span class="Comment"># taking up the entire screen</span> -<span id="L3597" class="LineNr">3597 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L3597'>page-down</a> editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ -<span id="L3598" class="LineNr">3598 </span> <span class="Constant">local-scope</span> -<span id="L3599" class="LineNr">3599 </span> <span class="Constant">load-inputs</span> -<span id="L3600" class="LineNr">3600 </span> <span class="Comment"># if editor contents don't overflow screen, do nothing</span> -<span id="L3601" class="LineNr">3601 </span> bottom-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">bottom-of-screen:offset</span> -<span id="L3602" class="LineNr">3602 </span> <span class="muControl">return-unless</span> bottom-of-screen -<span id="L3603" class="LineNr">3603 </span> <span class="Comment"># if not, position cursor at final character</span> -<span id="L3604" class="LineNr">3604 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> -<span id="L3605" class="LineNr">3605 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> bottom-of-screen -<span id="L3606" class="LineNr">3606 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor -<span id="L3607" class="LineNr">3607 </span> <span class="Comment"># keep one line in common with previous page</span> -<span id="L3608" class="LineNr">3608 </span> <span class="Delimiter">{</span> -<span id="L3609" class="LineNr">3609 </span> <a href='../065duplex_list.mu.html#L572'>last</a>:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> -<span id="L3610" class="LineNr">3610 </span> newline?:bool <span class="Special"><-</span> equal <a href='../065duplex_list.mu.html#L572'>last</a>, <span class="Constant">10/newline</span> -<span id="L3611" class="LineNr">3611 </span> <span class="muControl">break-unless</span> newline?:bool -<span id="L3612" class="LineNr">3612 </span> before-cursor <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> before-cursor -<span id="L3613" class="LineNr">3613 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor -<span id="L3614" class="LineNr">3614 </span> <span class="Delimiter">}</span> -<span id="L3615" class="LineNr">3615 </span> <span class="Comment"># move cursor and top-of-screen to start of that line</span> -<span id="L3616" class="LineNr">3616 </span> <a href='003-shortcuts.mu.html#L3622'>move-to-start-of-line</a> editor -<span id="L3617" class="LineNr">3617 </span> before-cursor <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> -<span id="L3618" class="LineNr">3618 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, before-cursor -<span id="L3619" class="LineNr">3619 </span>] -<span id="L3620" class="LineNr">3620 </span> -<span id="L3621" class="LineNr">3621 </span><span class="Comment"># jump to previous newline</span> -<span id="L3622" class="LineNr">3622 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L3622'>move-to-start-of-line</a> editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ -<span id="L3623" class="LineNr">3623 </span> <span class="Constant">local-scope</span> -<span id="L3624" class="LineNr">3624 </span> <span class="Constant">load-inputs</span> -<span id="L3625" class="LineNr">3625 </span> <span class="Comment"># update cursor column</span> -<span id="L3626" class="LineNr">3626 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> -<span id="L3627" class="LineNr">3627 </span> cursor-column:num <span class="Special"><-</span> copy left -<span id="L3628" class="LineNr">3628 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column -<span id="L3629" class="LineNr">3629 </span> <span class="Comment"># update before-cursor</span> -<span id="L3630" class="LineNr">3630 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> -<span id="L3631" class="LineNr">3631 </span> init:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> -<span id="L3632" class="LineNr">3632 </span> <span class="Comment"># while not at start of line, move</span> -<span id="L3633" class="LineNr">3633 </span> <span class="Delimiter">{</span> -<span id="L3634" class="LineNr">3634 </span> at-start-of-text?:bool <span class="Special"><-</span> equal before-cursor, init -<span id="L3635" class="LineNr">3635 </span> <span class="muControl">break-if</span> at-start-of-text? -<span id="L3636" class="LineNr">3636 </span> <a href='../065duplex_list.mu.html#L32'>prev</a>:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> -<span id="L3637" class="LineNr">3637 </span> at-start-of-line?:bool <span class="Special"><-</span> equal <a href='../065duplex_list.mu.html#L32'>prev</a>, <span class="Constant">10/newline</span> -<span id="L3638" class="LineNr">3638 </span> <span class="muControl">break-if</span> at-start-of-line? -<span id="L3639" class="LineNr">3639 </span> before-cursor <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L32'>prev</a> before-cursor -<span id="L3640" class="LineNr">3640 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor -<span id="L3641" class="LineNr">3641 </span> assert before-cursor, <span class="Constant">[move-to-start-of-line tried to move before start of text]</span> -<span id="L3642" class="LineNr">3642 </span> <span class="muControl"> loop</span> -<span id="L3643" class="LineNr">3643 </span> <span class="Delimiter">}</span> -<span id="L3644" class="LineNr">3644 </span>] -<span id="L3645" class="LineNr">3645 </span> -<span id="L3646" class="LineNr">3646 </span><span class="muScenario">scenario</span> editor-does-not-scroll-past-end [ -<span id="L3647" class="LineNr">3647 </span> <span class="Constant">local-scope</span> -<span id="L3648" class="LineNr">3648 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3649" class="LineNr">3649 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3650" class="LineNr">3650 </span><span class="Constant">b]</span> -<span id="L3651" class="LineNr">3651 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3652" class="LineNr">3652 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3653" class="LineNr">3653 </span> screen-should-contain [ -<span id="L3654" class="LineNr">3654 </span> <span class="Constant"> . .</span> -<span id="L3655" class="LineNr">3655 </span> <span class="Constant"> .a .</span> -<span id="L3656" class="LineNr">3656 </span> <span class="Constant"> .b .</span> -<span id="L3657" class="LineNr">3657 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L3658" class="LineNr">3658 </span> ] -<span id="L3659" class="LineNr">3659 </span> <span class="Comment"># scroll down</span> -<span id="L3660" class="LineNr">3660 </span> assume-console [ -<span id="L3661" class="LineNr">3661 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3662" class="LineNr">3662 </span> ] -<span id="L3663" class="LineNr">3663 </span> run [ -<span id="L3664" class="LineNr">3664 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3665" class="LineNr">3665 </span> ] -<span id="L3666" class="LineNr">3666 </span> <span class="Comment"># screen remains unmodified</span> -<span id="L3667" class="LineNr">3667 </span> screen-should-contain [ -<span id="L3668" class="LineNr">3668 </span> <span class="Constant"> . .</span> -<span id="L3669" class="LineNr">3669 </span> <span class="Constant"> .a .</span> -<span id="L3670" class="LineNr">3670 </span> <span class="Constant"> .b .</span> -<span id="L3671" class="LineNr">3671 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L3672" class="LineNr">3672 </span> ] -<span id="L3673" class="LineNr">3673 </span>] -<span id="L3674" class="LineNr">3674 </span> -<span id="L3675" class="LineNr">3675 </span><span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line [ -<span id="L3676" class="LineNr">3676 </span> <span class="Constant">local-scope</span> -<span id="L3677" class="LineNr">3677 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> -<span id="L3678" class="LineNr">3678 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3679" class="LineNr">3679 </span> <span class="Comment"># editor contains a long last line</span> -<span id="L3680" class="LineNr">3680 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3681" class="LineNr">3681 </span><span class="Constant">b</span> -<span id="L3682" class="LineNr">3682 </span><span class="Constant">cdefgh]</span> -<span id="L3683" class="LineNr">3683 </span> <span class="Comment"># editor screen triggers wrap of last line</span> -<span id="L3684" class="LineNr">3684 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> -<span id="L3685" class="LineNr">3685 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3686" class="LineNr">3686 </span> <span class="Comment"># some part of last line is not displayed</span> -<span id="L3687" class="LineNr">3687 </span> screen-should-contain [ -<span id="L3688" class="LineNr">3688 </span> <span class="Constant"> . .</span> -<span id="L3689" class="LineNr">3689 </span> <span class="Constant"> .a .</span> -<span id="L3690" class="LineNr">3690 </span> <span class="Constant"> .b .</span> -<span id="L3691" class="LineNr">3691 </span> <span class="Constant"> .cde↩ .</span> -<span id="L3692" class="LineNr">3692 </span> ] -<span id="L3693" class="LineNr">3693 </span> <span class="Comment"># scroll down</span> -<span id="L3694" class="LineNr">3694 </span> assume-console [ -<span id="L3695" class="LineNr">3695 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3696" class="LineNr">3696 </span> ] -<span id="L3697" class="LineNr">3697 </span> run [ -<span id="L3698" class="LineNr">3698 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3699" class="LineNr">3699 </span> ] -<span id="L3700" class="LineNr">3700 </span> <span class="Comment"># screen shows entire wrapped line</span> -<span id="L3701" class="LineNr">3701 </span> screen-should-contain [ -<span id="L3702" class="LineNr">3702 </span> <span class="Constant"> . .</span> -<span id="L3703" class="LineNr">3703 </span> <span class="Constant"> .cde↩ .</span> -<span id="L3704" class="LineNr">3704 </span> <span class="Constant"> .fgh .</span> -<span id="L3705" class="LineNr">3705 </span> <span class="Constant"> .╌╌╌╌ .</span> -<span id="L3706" class="LineNr">3706 </span> ] -<span id="L3707" class="LineNr">3707 </span>] -<span id="L3708" class="LineNr">3708 </span> -<span id="L3709" class="LineNr">3709 </span><span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line-2 [ -<span id="L3710" class="LineNr">3710 </span> <span class="Constant">local-scope</span> -<span id="L3711" class="LineNr">3711 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> -<span id="L3712" class="LineNr">3712 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3713" class="LineNr">3713 </span> <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> -<span id="L3714" class="LineNr">3714 </span> <span class="Comment"># and still has something left over</span> -<span id="L3715" class="LineNr">3715 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3716" class="LineNr">3716 </span><span class="Constant">bcdefgh]</span> -<span id="L3717" class="LineNr">3717 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> -<span id="L3718" class="LineNr">3718 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3719" class="LineNr">3719 </span> <span class="Comment"># some part of last line is not displayed</span> -<span id="L3720" class="LineNr">3720 </span> screen-should-contain [ -<span id="L3721" class="LineNr">3721 </span> <span class="Constant"> . .</span> -<span id="L3722" class="LineNr">3722 </span> <span class="Constant"> .a .</span> -<span id="L3723" class="LineNr">3723 </span> <span class="Constant"> .bcd↩ .</span> -<span id="L3724" class="LineNr">3724 </span> <span class="Constant"> .efg↩ .</span> -<span id="L3725" class="LineNr">3725 </span> ] -<span id="L3726" class="LineNr">3726 </span> <span class="Comment"># scroll down</span> -<span id="L3727" class="LineNr">3727 </span> assume-console [ -<span id="L3728" class="LineNr">3728 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3729" class="LineNr">3729 </span> ] -<span id="L3730" class="LineNr">3730 </span> run [ -<span id="L3731" class="LineNr">3731 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3732" class="LineNr">3732 </span> ] -<span id="L3733" class="LineNr">3733 </span> <span class="Comment"># screen shows entire wrapped line</span> -<span id="L3734" class="LineNr">3734 </span> screen-should-contain [ -<span id="L3735" class="LineNr">3735 </span> <span class="Constant"> . .</span> +<span id="L3466" class="LineNr">3466 </span> ] +<span id="L3467" class="LineNr">3467 </span> screen-should-contain [ +<span id="L3468" class="LineNr">3468 </span> <span class="Constant"> . .</span> +<span id="L3469" class="LineNr">3469 </span> <span class="Constant"> .c .</span> +<span id="L3470" class="LineNr">3470 </span> <span class="Constant"> .d .</span> +<span id="L3471" class="LineNr">3471 </span> <span class="Constant"> .e .</span> +<span id="L3472" class="LineNr">3472 </span> ] +<span id="L3473" class="LineNr">3473 </span> <span class="Comment"># now try to move left</span> +<span id="L3474" class="LineNr">3474 </span> assume-console [ +<span id="L3475" class="LineNr">3475 </span> press left-arrow +<span id="L3476" class="LineNr">3476 </span> ] +<span id="L3477" class="LineNr">3477 </span> run [ +<span id="L3478" class="LineNr">3478 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3479" class="LineNr">3479 </span> 3:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L3480" class="LineNr">3480 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L3481" class="LineNr">3481 </span> ] +<span id="L3482" class="LineNr">3482 </span> <span class="Comment"># screen scrolls</span> +<span id="L3483" class="LineNr">3483 </span> screen-should-contain [ +<span id="L3484" class="LineNr">3484 </span> <span class="Constant"> . .</span> +<span id="L3485" class="LineNr">3485 </span> <span class="Constant"> .b .</span> +<span id="L3486" class="LineNr">3486 </span> <span class="Constant"> .c .</span> +<span id="L3487" class="LineNr">3487 </span> <span class="Constant"> .d .</span> +<span id="L3488" class="LineNr">3488 </span> ] +<span id="L3489" class="LineNr">3489 </span> memory-should-contain [ +<span id="L3490" class="LineNr">3490 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<span id="L3491" class="LineNr">3491 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<span id="L3492" class="LineNr">3492 </span> ] +<span id="L3493" class="LineNr">3493 </span>] +<span id="L3494" class="LineNr">3494 </span> +<span id="L3495" class="LineNr">3495 </span><span class="muScenario">scenario</span> editor-can-scroll-up-to-start-of-file [ +<span id="L3496" class="LineNr">3496 </span> <span class="Constant">local-scope</span> +<span id="L3497" class="LineNr">3497 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3498" class="LineNr">3498 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3499" class="LineNr">3499 </span> <span class="Comment"># initialize editor with >3 lines</span> +<span id="L3500" class="LineNr">3500 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3501" class="LineNr">3501 </span><span class="Constant">b</span> +<span id="L3502" class="LineNr">3502 </span><span class="Constant">c</span> +<span id="L3503" class="LineNr">3503 </span><span class="Constant">d]</span> +<span id="L3504" class="LineNr">3504 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3505" class="LineNr">3505 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3506" class="LineNr">3506 </span> screen-should-contain [ +<span id="L3507" class="LineNr">3507 </span> <span class="Constant"> . .</span> +<span id="L3508" class="LineNr">3508 </span> <span class="Constant"> .a .</span> +<span id="L3509" class="LineNr">3509 </span> <span class="Constant"> .b .</span> +<span id="L3510" class="LineNr">3510 </span> <span class="Constant"> .c .</span> +<span id="L3511" class="LineNr">3511 </span> ] +<span id="L3512" class="LineNr">3512 </span> <span class="Comment"># position cursor at top of second page, then try to move up to start of</span> +<span id="L3513" class="LineNr">3513 </span> <span class="Comment"># text</span> +<span id="L3514" class="LineNr">3514 </span> assume-console [ +<span id="L3515" class="LineNr">3515 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3516" class="LineNr">3516 </span> press up-arrow +<span id="L3517" class="LineNr">3517 </span> press up-arrow +<span id="L3518" class="LineNr">3518 </span> ] +<span id="L3519" class="LineNr">3519 </span> run [ +<span id="L3520" class="LineNr">3520 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3521" class="LineNr">3521 </span> ] +<span id="L3522" class="LineNr">3522 </span> <span class="Comment"># screen slides by one line</span> +<span id="L3523" class="LineNr">3523 </span> screen-should-contain [ +<span id="L3524" class="LineNr">3524 </span> <span class="Constant"> . .</span> +<span id="L3525" class="LineNr">3525 </span> <span class="Constant"> .a .</span> +<span id="L3526" class="LineNr">3526 </span> <span class="Constant"> .b .</span> +<span id="L3527" class="LineNr">3527 </span> <span class="Constant"> .c .</span> +<span id="L3528" class="LineNr">3528 </span> ] +<span id="L3529" class="LineNr">3529 </span> <span class="Comment"># try to move up again</span> +<span id="L3530" class="LineNr">3530 </span> assume-console [ +<span id="L3531" class="LineNr">3531 </span> press up-arrow +<span id="L3532" class="LineNr">3532 </span> ] +<span id="L3533" class="LineNr">3533 </span> run [ +<span id="L3534" class="LineNr">3534 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3535" class="LineNr">3535 </span> ] +<span id="L3536" class="LineNr">3536 </span> <span class="Comment"># screen remains unchanged</span> +<span id="L3537" class="LineNr">3537 </span> screen-should-contain [ +<span id="L3538" class="LineNr">3538 </span> <span class="Constant"> . .</span> +<span id="L3539" class="LineNr">3539 </span> <span class="Constant"> .a .</span> +<span id="L3540" class="LineNr">3540 </span> <span class="Constant"> .b .</span> +<span id="L3541" class="LineNr">3541 </span> <span class="Constant"> .c .</span> +<span id="L3542" class="LineNr">3542 </span> ] +<span id="L3543" class="LineNr">3543 </span>] +<span id="L3544" class="LineNr">3544 </span> +<span id="L3545" class="LineNr">3545 </span><span class="Comment"># ctrl-f/page-down - render next page if it exists</span> +<span id="L3546" class="LineNr">3546 </span> +<span id="L3547" class="LineNr">3547 </span><span class="muScenario">scenario</span> editor-can-scroll [ +<span id="L3548" class="LineNr">3548 </span> <span class="Constant">local-scope</span> +<span id="L3549" class="LineNr">3549 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3550" class="LineNr">3550 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3551" class="LineNr">3551 </span><span class="Constant">b</span> +<span id="L3552" class="LineNr">3552 </span><span class="Constant">c</span> +<span id="L3553" class="LineNr">3553 </span><span class="Constant">d]</span> +<span id="L3554" class="LineNr">3554 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3555" class="LineNr">3555 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3556" class="LineNr">3556 </span> screen-should-contain [ +<span id="L3557" class="LineNr">3557 </span> <span class="Constant"> . .</span> +<span id="L3558" class="LineNr">3558 </span> <span class="Constant"> .a .</span> +<span id="L3559" class="LineNr">3559 </span> <span class="Constant"> .b .</span> +<span id="L3560" class="LineNr">3560 </span> <span class="Constant"> .c .</span> +<span id="L3561" class="LineNr">3561 </span> ] +<span id="L3562" class="LineNr">3562 </span> <span class="Comment"># scroll down</span> +<span id="L3563" class="LineNr">3563 </span> assume-console [ +<span id="L3564" class="LineNr">3564 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3565" class="LineNr">3565 </span> ] +<span id="L3566" class="LineNr">3566 </span> run [ +<span id="L3567" class="LineNr">3567 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3568" class="LineNr">3568 </span> ] +<span id="L3569" class="LineNr">3569 </span> <span class="Comment"># screen shows next page</span> +<span id="L3570" class="LineNr">3570 </span> screen-should-contain [ +<span id="L3571" class="LineNr">3571 </span> <span class="Constant"> . .</span> +<span id="L3572" class="LineNr">3572 </span> <span class="Constant"> .c .</span> +<span id="L3573" class="LineNr">3573 </span> <span class="Constant"> .d .</span> +<span id="L3574" class="LineNr">3574 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L3575" class="LineNr">3575 </span> ] +<span id="L3576" class="LineNr">3576 </span>] +<span id="L3577" class="LineNr">3577 </span> +<span id="L3578" class="LineNr">3578 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ +<span id="L3579" class="LineNr">3579 </span> <span class="Delimiter">{</span> +<span id="L3580" class="LineNr">3580 </span> page-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">6/ctrl-f</span> +<span id="L3581" class="LineNr">3581 </span> <span class="muControl">break-unless</span> page-down? +<span id="L3582" class="LineNr">3582 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3583" class="LineNr">3583 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L3584" class="LineNr">3584 </span> <a href='003-shortcuts.mu.html#L3610'>page-down</a> editor +<span id="L3585" class="LineNr">3585 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<span id="L3586" class="LineNr">3586 </span><span class="Constant"> <end-move-cursor></span> +<span id="L3587" class="LineNr">3587 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3588" class="LineNr">3588 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<span id="L3589" class="LineNr">3589 </span> <span class="muControl"> return</span> movement?/go-render +<span id="L3590" class="LineNr">3590 </span> <span class="Delimiter">}</span> +<span id="L3591" class="LineNr">3591 </span>] +<span id="L3592" class="LineNr">3592 </span> +<span id="L3593" class="LineNr">3593 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L199'><handle-special-key></a></span> [ +<span id="L3594" class="LineNr">3594 </span> <span class="Delimiter">{</span> +<span id="L3595" class="LineNr">3595 </span> page-down?:bool <span class="Special"><-</span> equal k, <span class="Constant">65518/page-down</span> +<span id="L3596" class="LineNr">3596 </span> <span class="muControl">break-unless</span> page-down? +<span id="L3597" class="LineNr">3597 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3598" class="LineNr">3598 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L3599" class="LineNr">3599 </span> <a href='003-shortcuts.mu.html#L3610'>page-down</a> editor +<span id="L3600" class="LineNr">3600 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<span id="L3601" class="LineNr">3601 </span><span class="Constant"> <end-move-cursor></span> +<span id="L3602" class="LineNr">3602 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3603" class="LineNr">3603 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<span id="L3604" class="LineNr">3604 </span> <span class="muControl"> return</span> movement?/go-render +<span id="L3605" class="LineNr">3605 </span> <span class="Delimiter">}</span> +<span id="L3606" class="LineNr">3606 </span>] +<span id="L3607" class="LineNr">3607 </span> +<span id="L3608" class="LineNr">3608 </span><span class="Comment"># page-down skips entire wrapped lines, so it can't scroll past lines</span> +<span id="L3609" class="LineNr">3609 </span><span class="Comment"># taking up the entire screen</span> +<span id="L3610" class="LineNr">3610 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L3610'>page-down</a> editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ +<span id="L3611" class="LineNr">3611 </span> <span class="Constant">local-scope</span> +<span id="L3612" class="LineNr">3612 </span> <span class="Constant">load-inputs</span> +<span id="L3613" class="LineNr">3613 </span> <span class="Comment"># if editor contents don't overflow screen, do nothing</span> +<span id="L3614" class="LineNr">3614 </span> bottom-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">bottom-of-screen:offset</span> +<span id="L3615" class="LineNr">3615 </span> <span class="muControl">return-unless</span> bottom-of-screen +<span id="L3616" class="LineNr">3616 </span> <span class="Comment"># if not, position cursor at final character</span> +<span id="L3617" class="LineNr">3617 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<span id="L3618" class="LineNr">3618 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> bottom-of-screen +<span id="L3619" class="LineNr">3619 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<span id="L3620" class="LineNr">3620 </span> <span class="Comment"># keep one line in common with previous page</span> +<span id="L3621" class="LineNr">3621 </span> <span class="Delimiter">{</span> +<span id="L3622" class="LineNr">3622 </span> <a href='../065duplex_list.mu.html#L629'>last</a>:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> +<span id="L3623" class="LineNr">3623 </span> newline?:bool <span class="Special"><-</span> equal <a href='../065duplex_list.mu.html#L629'>last</a>, <span class="Constant">10/newline</span> +<span id="L3624" class="LineNr">3624 </span> <span class="muControl">break-unless</span> newline?:bool +<span id="L3625" class="LineNr">3625 </span> before-cursor <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> before-cursor +<span id="L3626" class="LineNr">3626 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<span id="L3627" class="LineNr">3627 </span> <span class="Delimiter">}</span> +<span id="L3628" class="LineNr">3628 </span> <span class="Comment"># move cursor and top-of-screen to start of that line</span> +<span id="L3629" class="LineNr">3629 </span> <a href='003-shortcuts.mu.html#L3635'>move-to-start-of-line</a> editor +<span id="L3630" class="LineNr">3630 </span> before-cursor <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<span id="L3631" class="LineNr">3631 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, before-cursor +<span id="L3632" class="LineNr">3632 </span>] +<span id="L3633" class="LineNr">3633 </span> +<span id="L3634" class="LineNr">3634 </span><span class="Comment"># jump to previous newline</span> +<span id="L3635" class="LineNr">3635 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L3635'>move-to-start-of-line</a> editor:&:editor<span class="muRecipe"> -> </span>editor:&:editor [ +<span id="L3636" class="LineNr">3636 </span> <span class="Constant">local-scope</span> +<span id="L3637" class="LineNr">3637 </span> <span class="Constant">load-inputs</span> +<span id="L3638" class="LineNr">3638 </span> <span class="Comment"># update cursor column</span> +<span id="L3639" class="LineNr">3639 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<span id="L3640" class="LineNr">3640 </span> cursor-column:num <span class="Special"><-</span> copy left +<span id="L3641" class="LineNr">3641 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<span id="L3642" class="LineNr">3642 </span> <span class="Comment"># update before-cursor</span> +<span id="L3643" class="LineNr">3643 </span> before-cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<span id="L3644" class="LineNr">3644 </span> init:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<span id="L3645" class="LineNr">3645 </span> <span class="Comment"># while not at start of line, move</span> +<span id="L3646" class="LineNr">3646 </span> <span class="Delimiter">{</span> +<span id="L3647" class="LineNr">3647 </span> at-start-of-text?:bool <span class="Special"><-</span> equal before-cursor, init +<span id="L3648" class="LineNr">3648 </span> <span class="muControl">break-if</span> at-start-of-text? +<span id="L3649" class="LineNr">3649 </span> <a href='../065duplex_list.mu.html#L38'>prev</a>:char <span class="Special"><-</span> get *before-cursor, <span class="Constant">value:offset</span> +<span id="L3650" class="LineNr">3650 </span> at-start-of-line?:bool <span class="Special"><-</span> equal <a href='../065duplex_list.mu.html#L38'>prev</a>, <span class="Constant">10/newline</span> +<span id="L3651" class="LineNr">3651 </span> <span class="muControl">break-if</span> at-start-of-line? +<span id="L3652" class="LineNr">3652 </span> before-cursor <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L38'>prev</a> before-cursor +<span id="L3653" class="LineNr">3653 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">before-cursor:offset</span>, before-cursor +<span id="L3654" class="LineNr">3654 </span> assert before-cursor, <span class="Constant">[move-to-start-of-line tried to move before start of text]</span> +<span id="L3655" class="LineNr">3655 </span> <span class="muControl"> loop</span> +<span id="L3656" class="LineNr">3656 </span> <span class="Delimiter">}</span> +<span id="L3657" class="LineNr">3657 </span>] +<span id="L3658" class="LineNr">3658 </span> +<span id="L3659" class="LineNr">3659 </span><span class="muScenario">scenario</span> editor-does-not-scroll-past-end [ +<span id="L3660" class="LineNr">3660 </span> <span class="Constant">local-scope</span> +<span id="L3661" class="LineNr">3661 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3662" class="LineNr">3662 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3663" class="LineNr">3663 </span><span class="Constant">b]</span> +<span id="L3664" class="LineNr">3664 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3665" class="LineNr">3665 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3666" class="LineNr">3666 </span> screen-should-contain [ +<span id="L3667" class="LineNr">3667 </span> <span class="Constant"> . .</span> +<span id="L3668" class="LineNr">3668 </span> <span class="Constant"> .a .</span> +<span id="L3669" class="LineNr">3669 </span> <span class="Constant"> .b .</span> +<span id="L3670" class="LineNr">3670 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L3671" class="LineNr">3671 </span> ] +<span id="L3672" class="LineNr">3672 </span> <span class="Comment"># scroll down</span> +<span id="L3673" class="LineNr">3673 </span> assume-console [ +<span id="L3674" class="LineNr">3674 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3675" class="LineNr">3675 </span> ] +<span id="L3676" class="LineNr">3676 </span> run [ +<span id="L3677" class="LineNr">3677 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3678" class="LineNr">3678 </span> ] +<span id="L3679" class="LineNr">3679 </span> <span class="Comment"># screen remains unmodified</span> +<span id="L3680" class="LineNr">3680 </span> screen-should-contain [ +<span id="L3681" class="LineNr">3681 </span> <span class="Constant"> . .</span> +<span id="L3682" class="LineNr">3682 </span> <span class="Constant"> .a .</span> +<span id="L3683" class="LineNr">3683 </span> <span class="Constant"> .b .</span> +<span id="L3684" class="LineNr">3684 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L3685" class="LineNr">3685 </span> ] +<span id="L3686" class="LineNr">3686 </span>] +<span id="L3687" class="LineNr">3687 </span> +<span id="L3688" class="LineNr">3688 </span><span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line [ +<span id="L3689" class="LineNr">3689 </span> <span class="Constant">local-scope</span> +<span id="L3690" class="LineNr">3690 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> +<span id="L3691" class="LineNr">3691 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3692" class="LineNr">3692 </span> <span class="Comment"># editor contains a long last line</span> +<span id="L3693" class="LineNr">3693 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3694" class="LineNr">3694 </span><span class="Constant">b</span> +<span id="L3695" class="LineNr">3695 </span><span class="Constant">cdefgh]</span> +<span id="L3696" class="LineNr">3696 </span> <span class="Comment"># editor screen triggers wrap of last line</span> +<span id="L3697" class="LineNr">3697 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<span id="L3698" class="LineNr">3698 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3699" class="LineNr">3699 </span> <span class="Comment"># some part of last line is not displayed</span> +<span id="L3700" class="LineNr">3700 </span> screen-should-contain [ +<span id="L3701" class="LineNr">3701 </span> <span class="Constant"> . .</span> +<span id="L3702" class="LineNr">3702 </span> <span class="Constant"> .a .</span> +<span id="L3703" class="LineNr">3703 </span> <span class="Constant"> .b .</span> +<span id="L3704" class="LineNr">3704 </span> <span class="Constant"> .cde↩ .</span> +<span id="L3705" class="LineNr">3705 </span> ] +<span id="L3706" class="LineNr">3706 </span> <span class="Comment"># scroll down</span> +<span id="L3707" class="LineNr">3707 </span> assume-console [ +<span id="L3708" class="LineNr">3708 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3709" class="LineNr">3709 </span> ] +<span id="L3710" class="LineNr">3710 </span> run [ +<span id="L3711" class="LineNr">3711 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3712" class="LineNr">3712 </span> ] +<span id="L3713" class="LineNr">3713 </span> <span class="Comment"># screen shows entire wrapped line</span> +<span id="L3714" class="LineNr">3714 </span> screen-should-contain [ +<span id="L3715" class="LineNr">3715 </span> <span class="Constant"> . .</span> +<span id="L3716" class="LineNr">3716 </span> <span class="Constant"> .cde↩ .</span> +<span id="L3717" class="LineNr">3717 </span> <span class="Constant"> .fgh .</span> +<span id="L3718" class="LineNr">3718 </span> <span class="Constant"> .╌╌╌╌ .</span> +<span id="L3719" class="LineNr">3719 </span> ] +<span id="L3720" class="LineNr">3720 </span>] +<span id="L3721" class="LineNr">3721 </span> +<span id="L3722" class="LineNr">3722 </span><span class="muScenario">scenario</span> editor-starts-next-page-at-start-of-wrapped-line-2 [ +<span id="L3723" class="LineNr">3723 </span> <span class="Constant">local-scope</span> +<span id="L3724" class="LineNr">3724 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> +<span id="L3725" class="LineNr">3725 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3726" class="LineNr">3726 </span> <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> +<span id="L3727" class="LineNr">3727 </span> <span class="Comment"># and still has something left over</span> +<span id="L3728" class="LineNr">3728 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3729" class="LineNr">3729 </span><span class="Constant">bcdefgh]</span> +<span id="L3730" class="LineNr">3730 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<span id="L3731" class="LineNr">3731 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3732" class="LineNr">3732 </span> <span class="Comment"># some part of last line is not displayed</span> +<span id="L3733" class="LineNr">3733 </span> screen-should-contain [ +<span id="L3734" class="LineNr">3734 </span> <span class="Constant"> . .</span> +<span id="L3735" class="LineNr">3735 </span> <span class="Constant"> .a .</span> <span id="L3736" class="LineNr">3736 </span> <span class="Constant"> .bcd↩ .</span> <span id="L3737" class="LineNr">3737 </span> <span class="Constant"> .efg↩ .</span> -<span id="L3738" class="LineNr">3738 </span> <span class="Constant"> .h .</span> -<span id="L3739" class="LineNr">3739 </span> ] -<span id="L3740" class="LineNr">3740 </span>] -<span id="L3741" class="LineNr">3741 </span> -<span id="L3742" class="LineNr">3742 </span><span class="Comment"># ctrl-b/page-up - render previous page if it exists</span> -<span id="L3743" class="LineNr">3743 </span> -<span id="L3744" class="LineNr">3744 </span><span class="muScenario">scenario</span> editor-can-scroll-up [ -<span id="L3745" class="LineNr">3745 </span> <span class="Constant">local-scope</span> -<span id="L3746" class="LineNr">3746 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3747" class="LineNr">3747 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3748" class="LineNr">3748 </span><span class="Constant">b</span> -<span id="L3749" class="LineNr">3749 </span><span class="Constant">c</span> -<span id="L3750" class="LineNr">3750 </span><span class="Constant">d]</span> -<span id="L3751" class="LineNr">3751 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3752" class="LineNr">3752 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3753" class="LineNr">3753 </span> screen-should-contain [ -<span id="L3754" class="LineNr">3754 </span> <span class="Constant"> . .</span> -<span id="L3755" class="LineNr">3755 </span> <span class="Constant"> .a .</span> -<span id="L3756" class="LineNr">3756 </span> <span class="Constant"> .b .</span> -<span id="L3757" class="LineNr">3757 </span> <span class="Constant"> .c .</span> -<span id="L3758" class="LineNr">3758 </span> ] -<span id="L3759" class="LineNr">3759 </span> <span class="Comment"># scroll down</span> -<span id="L3760" class="LineNr">3760 </span> assume-console [ -<span id="L3761" class="LineNr">3761 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3762" class="LineNr">3762 </span> ] -<span id="L3763" class="LineNr">3763 </span> run [ -<span id="L3764" class="LineNr">3764 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3765" class="LineNr">3765 </span> ] -<span id="L3766" class="LineNr">3766 </span> <span class="Comment"># screen shows next page</span> -<span id="L3767" class="LineNr">3767 </span> screen-should-contain [ -<span id="L3768" class="LineNr">3768 </span> <span class="Constant"> . .</span> -<span id="L3769" class="LineNr">3769 </span> <span class="Constant"> .c .</span> -<span id="L3770" class="LineNr">3770 </span> <span class="Constant"> .d .</span> -<span id="L3771" class="LineNr">3771 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L3772" class="LineNr">3772 </span> ] -<span id="L3773" class="LineNr">3773 </span> <span class="Comment"># scroll back up</span> -<span id="L3774" class="LineNr">3774 </span> assume-console [ -<span id="L3775" class="LineNr">3775 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> -<span id="L3776" class="LineNr">3776 </span> ] -<span id="L3777" class="LineNr">3777 </span> run [ -<span id="L3778" class="LineNr">3778 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3779" class="LineNr">3779 </span> ] -<span id="L3780" class="LineNr">3780 </span> <span class="Comment"># screen shows original page again</span> -<span id="L3781" class="LineNr">3781 </span> screen-should-contain [ -<span id="L3782" class="LineNr">3782 </span> <span class="Constant"> . .</span> -<span id="L3783" class="LineNr">3783 </span> <span class="Constant"> .a .</span> -<span id="L3784" class="LineNr">3784 </span> <span class="Constant"> .b .</span> -<span id="L3785" class="LineNr">3785 </span> <span class="Constant"> .c .</span> -<span id="L3786" class="LineNr">3786 </span> ] -<span id="L3787" class="LineNr">3787 </span>] -<span id="L3788" class="LineNr">3788 </span> -<span id="L3789" class="LineNr">3789 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ -<span id="L3790" class="LineNr">3790 </span> <span class="Delimiter">{</span> -<span id="L3791" class="LineNr">3791 </span> page-up?:bool <span class="Special"><-</span> equal c, <span class="Constant">2/ctrl-b</span> -<span id="L3792" class="LineNr">3792 </span> <span class="muControl">break-unless</span> page-up? -<span id="L3793" class="LineNr">3793 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3794" class="LineNr">3794 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L3795" class="LineNr">3795 </span> editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L3820'>page-up</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> -<span id="L3796" class="LineNr">3796 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span id="L3797" class="LineNr">3797 </span><span class="Constant"> <end-move-cursor></span> -<span id="L3798" class="LineNr">3798 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3799" class="LineNr">3799 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top -<span id="L3800" class="LineNr">3800 </span> <span class="muControl"> return</span> movement?/go-render -<span id="L3801" class="LineNr">3801 </span> <span class="Delimiter">}</span> -<span id="L3802" class="LineNr">3802 </span>] -<span id="L3803" class="LineNr">3803 </span> -<span id="L3804" class="LineNr">3804 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L199'><handle-special-key></a></span> [ -<span id="L3805" class="LineNr">3805 </span> <span class="Delimiter">{</span> -<span id="L3806" class="LineNr">3806 </span> page-up?:bool <span class="Special"><-</span> equal k, <span class="Constant">65519/page-up</span> -<span id="L3807" class="LineNr">3807 </span> <span class="muControl">break-unless</span> page-up? -<span id="L3808" class="LineNr">3808 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3809" class="LineNr">3809 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L3810" class="LineNr">3810 </span> editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L3820'>page-up</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> -<span id="L3811" class="LineNr">3811 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span id="L3812" class="LineNr">3812 </span><span class="Constant"> <end-move-cursor></span> -<span id="L3813" class="LineNr">3813 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3814" class="LineNr">3814 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top -<span id="L3815" class="LineNr">3815 </span> <span class="Comment"># don't bother re-rendering if nothing changed. todo: test this</span> -<span id="L3816" class="LineNr">3816 </span> <span class="muControl"> return</span> movement?/go-render -<span id="L3817" class="LineNr">3817 </span> <span class="Delimiter">}</span> -<span id="L3818" class="LineNr">3818 </span>] -<span id="L3819" class="LineNr">3819 </span> -<span id="L3820" class="LineNr">3820 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L3820'>page-up</a> editor:&:editor, <a href='../081print.mu.html#L782'>screen-height</a>:num<span class="muRecipe"> -> </span>editor:&:editor [ -<span id="L3821" class="LineNr">3821 </span> <span class="Constant">local-scope</span> -<span id="L3822" class="LineNr">3822 </span> <span class="Constant">load-inputs</span> -<span id="L3823" class="LineNr">3823 </span> max:num <span class="Special"><-</span> subtract <a href='../081print.mu.html#L782'>screen-height</a>, <span class="Constant">1/menu-bar</span>, <span class="Constant">1/overlapping-line</span> -<span id="L3824" class="LineNr">3824 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> -<span id="L3825" class="LineNr">3825 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L3826" class="LineNr">3826 </span> <span class="Delimiter">{</span> -<span id="L3827" class="LineNr">3827 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max -<span id="L3828" class="LineNr">3828 </span> <span class="muControl">break-if</span> done? -<span id="L3829" class="LineNr">3829 </span> <a href='../065duplex_list.mu.html#L32'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> top-of-screen, editor -<span id="L3830" class="LineNr">3830 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L32'>prev</a> -<span id="L3831" class="LineNr">3831 </span> top-of-screen <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L32'>prev</a> -<span id="L3832" class="LineNr">3832 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen -<span id="L3833" class="LineNr">3833 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> -<span id="L3834" class="LineNr">3834 </span> <span class="muControl"> loop</span> -<span id="L3835" class="LineNr">3835 </span> <span class="Delimiter">}</span> -<span id="L3836" class="LineNr">3836 </span>] -<span id="L3837" class="LineNr">3837 </span> -<span id="L3838" class="LineNr">3838 </span><span class="muScenario">scenario</span> editor-can-scroll-up-multiple-pages [ -<span id="L3839" class="LineNr">3839 </span> <span class="Constant">local-scope</span> -<span id="L3840" class="LineNr">3840 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> -<span id="L3841" class="LineNr">3841 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3842" class="LineNr">3842 </span> <span class="Comment"># initialize editor with 8 lines</span> -<span id="L3843" class="LineNr">3843 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3844" class="LineNr">3844 </span><span class="Constant">b</span> -<span id="L3845" class="LineNr">3845 </span><span class="Constant">c</span> -<span id="L3846" class="LineNr">3846 </span><span class="Constant">d</span> -<span id="L3847" class="LineNr">3847 </span><span class="Constant">e</span> -<span id="L3848" class="LineNr">3848 </span><span class="Constant">f</span> -<span id="L3849" class="LineNr">3849 </span><span class="Constant">g</span> -<span id="L3850" class="LineNr">3850 </span><span class="Constant">h]</span> -<span id="L3851" class="LineNr">3851 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L3852" class="LineNr">3852 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3853" class="LineNr">3853 </span> screen-should-contain [ -<span id="L3854" class="LineNr">3854 </span> <span class="Constant"> . .</span> -<span id="L3855" class="LineNr">3855 </span> <span class="Constant"> .a .</span> -<span id="L3856" class="LineNr">3856 </span> <span class="Constant"> .b .</span> -<span id="L3857" class="LineNr">3857 </span> <span class="Constant"> .c .</span> -<span id="L3858" class="LineNr">3858 </span> ] -<span id="L3859" class="LineNr">3859 </span> <span class="Comment"># scroll down two pages</span> -<span id="L3860" class="LineNr">3860 </span> assume-console [ -<span id="L3861" class="LineNr">3861 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3862" class="LineNr">3862 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3863" class="LineNr">3863 </span> ] -<span id="L3864" class="LineNr">3864 </span> run [ -<span id="L3865" class="LineNr">3865 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3866" class="LineNr">3866 </span> ] -<span id="L3867" class="LineNr">3867 </span> <span class="Comment"># screen shows third page</span> -<span id="L3868" class="LineNr">3868 </span> screen-should-contain [ -<span id="L3869" class="LineNr">3869 </span> <span class="Constant"> . .</span> -<span id="L3870" class="LineNr">3870 </span> <span class="Constant"> .e .</span> -<span id="L3871" class="LineNr">3871 </span> <span class="Constant"> .f .</span> -<span id="L3872" class="LineNr">3872 </span> <span class="Constant"> .g .</span> -<span id="L3873" class="LineNr">3873 </span> ] -<span id="L3874" class="LineNr">3874 </span> <span class="Comment"># scroll up</span> -<span id="L3875" class="LineNr">3875 </span> assume-console [ -<span id="L3876" class="LineNr">3876 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> -<span id="L3877" class="LineNr">3877 </span> ] -<span id="L3878" class="LineNr">3878 </span> run [ -<span id="L3879" class="LineNr">3879 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3880" class="LineNr">3880 </span> ] -<span id="L3881" class="LineNr">3881 </span> <span class="Comment"># screen shows second page</span> -<span id="L3882" class="LineNr">3882 </span> screen-should-contain [ -<span id="L3883" class="LineNr">3883 </span> <span class="Constant"> . .</span> -<span id="L3884" class="LineNr">3884 </span> <span class="Constant"> .c .</span> -<span id="L3885" class="LineNr">3885 </span> <span class="Constant"> .d .</span> -<span id="L3886" class="LineNr">3886 </span> <span class="Constant"> .e .</span> -<span id="L3887" class="LineNr">3887 </span> ] -<span id="L3888" class="LineNr">3888 </span> <span class="Comment"># scroll up again</span> -<span id="L3889" class="LineNr">3889 </span> assume-console [ -<span id="L3890" class="LineNr">3890 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> -<span id="L3891" class="LineNr">3891 </span> ] -<span id="L3892" class="LineNr">3892 </span> run [ -<span id="L3893" class="LineNr">3893 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3894" class="LineNr">3894 </span> ] -<span id="L3895" class="LineNr">3895 </span> <span class="Comment"># screen shows original page again</span> -<span id="L3896" class="LineNr">3896 </span> screen-should-contain [ -<span id="L3897" class="LineNr">3897 </span> <span class="Constant"> . .</span> -<span id="L3898" class="LineNr">3898 </span> <span class="Constant"> .a .</span> -<span id="L3899" class="LineNr">3899 </span> <span class="Constant"> .b .</span> -<span id="L3900" class="LineNr">3900 </span> <span class="Constant"> .c .</span> -<span id="L3901" class="LineNr">3901 </span> ] -<span id="L3902" class="LineNr">3902 </span>] -<span id="L3903" class="LineNr">3903 </span> -<span id="L3904" class="LineNr">3904 </span><span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines [ -<span id="L3905" class="LineNr">3905 </span> <span class="Constant">local-scope</span> -<span id="L3906" class="LineNr">3906 </span> <span class="Comment"># screen has 1 line for menu + 5 lines for text</span> -<span id="L3907" class="LineNr">3907 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">6/height</span> -<span id="L3908" class="LineNr">3908 </span> <span class="Comment"># editor contains a long line in the first page</span> -<span id="L3909" class="LineNr">3909 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3910" class="LineNr">3910 </span><span class="Constant">b</span> -<span id="L3911" class="LineNr">3911 </span><span class="Constant">cdefgh</span> -<span id="L3912" class="LineNr">3912 </span><span class="Constant">i</span> -<span id="L3913" class="LineNr">3913 </span><span class="Constant">j</span> -<span id="L3914" class="LineNr">3914 </span><span class="Constant">k</span> -<span id="L3915" class="LineNr">3915 </span><span class="Constant">l</span> -<span id="L3916" class="LineNr">3916 </span><span class="Constant">m</span> -<span id="L3917" class="LineNr">3917 </span><span class="Constant">n</span> -<span id="L3918" class="LineNr">3918 </span><span class="Constant">o]</span> -<span id="L3919" class="LineNr">3919 </span> <span class="Comment"># editor screen triggers wrap of last line</span> -<span id="L3920" class="LineNr">3920 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> -<span id="L3921" class="LineNr">3921 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3922" class="LineNr">3922 </span> <span class="Comment"># some part of last line is not displayed</span> -<span id="L3923" class="LineNr">3923 </span> screen-should-contain [ -<span id="L3924" class="LineNr">3924 </span> <span class="Constant"> . .</span> -<span id="L3925" class="LineNr">3925 </span> <span class="Constant"> .a .</span> -<span id="L3926" class="LineNr">3926 </span> <span class="Constant"> .b .</span> -<span id="L3927" class="LineNr">3927 </span> <span class="Constant"> .cde↩ .</span> -<span id="L3928" class="LineNr">3928 </span> <span class="Constant"> .fgh .</span> -<span id="L3929" class="LineNr">3929 </span> <span class="Constant"> .i .</span> -<span id="L3930" class="LineNr">3930 </span> ] -<span id="L3931" class="LineNr">3931 </span> <span class="Comment"># scroll down a page and a line</span> -<span id="L3932" class="LineNr">3932 </span> assume-console [ -<span id="L3933" class="LineNr">3933 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3934" class="LineNr">3934 </span> left-click<span class="Constant"> 5</span>,<span class="Constant"> 0</span> -<span id="L3935" class="LineNr">3935 </span> press down-arrow -<span id="L3936" class="LineNr">3936 </span> ] -<span id="L3937" class="LineNr">3937 </span> run [ -<span id="L3938" class="LineNr">3938 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3939" class="LineNr">3939 </span> ] -<span id="L3940" class="LineNr">3940 </span> <span class="Comment"># screen shows entire wrapped line</span> -<span id="L3941" class="LineNr">3941 </span> screen-should-contain [ -<span id="L3942" class="LineNr">3942 </span> <span class="Constant"> . .</span> -<span id="L3943" class="LineNr">3943 </span> <span class="Constant"> .j .</span> -<span id="L3944" class="LineNr">3944 </span> <span class="Constant"> .k .</span> -<span id="L3945" class="LineNr">3945 </span> <span class="Constant"> .l .</span> -<span id="L3946" class="LineNr">3946 </span> <span class="Constant"> .m .</span> -<span id="L3947" class="LineNr">3947 </span> <span class="Constant"> .n .</span> -<span id="L3948" class="LineNr">3948 </span> ] -<span id="L3949" class="LineNr">3949 </span> <span class="Comment"># now scroll up one page</span> -<span id="L3950" class="LineNr">3950 </span> assume-console [ -<span id="L3951" class="LineNr">3951 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> +<span id="L3738" class="LineNr">3738 </span> ] +<span id="L3739" class="LineNr">3739 </span> <span class="Comment"># scroll down</span> +<span id="L3740" class="LineNr">3740 </span> assume-console [ +<span id="L3741" class="LineNr">3741 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3742" class="LineNr">3742 </span> ] +<span id="L3743" class="LineNr">3743 </span> run [ +<span id="L3744" class="LineNr">3744 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3745" class="LineNr">3745 </span> ] +<span id="L3746" class="LineNr">3746 </span> <span class="Comment"># screen shows entire wrapped line</span> +<span id="L3747" class="LineNr">3747 </span> screen-should-contain [ +<span id="L3748" class="LineNr">3748 </span> <span class="Constant"> . .</span> +<span id="L3749" class="LineNr">3749 </span> <span class="Constant"> .bcd↩ .</span> +<span id="L3750" class="LineNr">3750 </span> <span class="Constant"> .efg↩ .</span> +<span id="L3751" class="LineNr">3751 </span> <span class="Constant"> .h .</span> +<span id="L3752" class="LineNr">3752 </span> ] +<span id="L3753" class="LineNr">3753 </span>] +<span id="L3754" class="LineNr">3754 </span> +<span id="L3755" class="LineNr">3755 </span><span class="Comment"># ctrl-b/page-up - render previous page if it exists</span> +<span id="L3756" class="LineNr">3756 </span> +<span id="L3757" class="LineNr">3757 </span><span class="muScenario">scenario</span> editor-can-scroll-up [ +<span id="L3758" class="LineNr">3758 </span> <span class="Constant">local-scope</span> +<span id="L3759" class="LineNr">3759 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3760" class="LineNr">3760 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3761" class="LineNr">3761 </span><span class="Constant">b</span> +<span id="L3762" class="LineNr">3762 </span><span class="Constant">c</span> +<span id="L3763" class="LineNr">3763 </span><span class="Constant">d]</span> +<span id="L3764" class="LineNr">3764 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3765" class="LineNr">3765 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3766" class="LineNr">3766 </span> screen-should-contain [ +<span id="L3767" class="LineNr">3767 </span> <span class="Constant"> . .</span> +<span id="L3768" class="LineNr">3768 </span> <span class="Constant"> .a .</span> +<span id="L3769" class="LineNr">3769 </span> <span class="Constant"> .b .</span> +<span id="L3770" class="LineNr">3770 </span> <span class="Constant"> .c .</span> +<span id="L3771" class="LineNr">3771 </span> ] +<span id="L3772" class="LineNr">3772 </span> <span class="Comment"># scroll down</span> +<span id="L3773" class="LineNr">3773 </span> assume-console [ +<span id="L3774" class="LineNr">3774 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3775" class="LineNr">3775 </span> ] +<span id="L3776" class="LineNr">3776 </span> run [ +<span id="L3777" class="LineNr">3777 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3778" class="LineNr">3778 </span> ] +<span id="L3779" class="LineNr">3779 </span> <span class="Comment"># screen shows next page</span> +<span id="L3780" class="LineNr">3780 </span> screen-should-contain [ +<span id="L3781" class="LineNr">3781 </span> <span class="Constant"> . .</span> +<span id="L3782" class="LineNr">3782 </span> <span class="Constant"> .c .</span> +<span id="L3783" class="LineNr">3783 </span> <span class="Constant"> .d .</span> +<span id="L3784" class="LineNr">3784 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L3785" class="LineNr">3785 </span> ] +<span id="L3786" class="LineNr">3786 </span> <span class="Comment"># scroll back up</span> +<span id="L3787" class="LineNr">3787 </span> assume-console [ +<span id="L3788" class="LineNr">3788 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L3789" class="LineNr">3789 </span> ] +<span id="L3790" class="LineNr">3790 </span> run [ +<span id="L3791" class="LineNr">3791 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3792" class="LineNr">3792 </span> ] +<span id="L3793" class="LineNr">3793 </span> <span class="Comment"># screen shows original page again</span> +<span id="L3794" class="LineNr">3794 </span> screen-should-contain [ +<span id="L3795" class="LineNr">3795 </span> <span class="Constant"> . .</span> +<span id="L3796" class="LineNr">3796 </span> <span class="Constant"> .a .</span> +<span id="L3797" class="LineNr">3797 </span> <span class="Constant"> .b .</span> +<span id="L3798" class="LineNr">3798 </span> <span class="Constant"> .c .</span> +<span id="L3799" class="LineNr">3799 </span> ] +<span id="L3800" class="LineNr">3800 </span>] +<span id="L3801" class="LineNr">3801 </span> +<span id="L3802" class="LineNr">3802 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ +<span id="L3803" class="LineNr">3803 </span> <span class="Delimiter">{</span> +<span id="L3804" class="LineNr">3804 </span> page-up?:bool <span class="Special"><-</span> equal c, <span class="Constant">2/ctrl-b</span> +<span id="L3805" class="LineNr">3805 </span> <span class="muControl">break-unless</span> page-up? +<span id="L3806" class="LineNr">3806 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3807" class="LineNr">3807 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L3808" class="LineNr">3808 </span> editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L3833'>page-up</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> +<span id="L3809" class="LineNr">3809 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<span id="L3810" class="LineNr">3810 </span><span class="Constant"> <end-move-cursor></span> +<span id="L3811" class="LineNr">3811 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3812" class="LineNr">3812 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<span id="L3813" class="LineNr">3813 </span> <span class="muControl"> return</span> movement?/go-render +<span id="L3814" class="LineNr">3814 </span> <span class="Delimiter">}</span> +<span id="L3815" class="LineNr">3815 </span>] +<span id="L3816" class="LineNr">3816 </span> +<span id="L3817" class="LineNr">3817 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L199'><handle-special-key></a></span> [ +<span id="L3818" class="LineNr">3818 </span> <span class="Delimiter">{</span> +<span id="L3819" class="LineNr">3819 </span> page-up?:bool <span class="Special"><-</span> equal k, <span class="Constant">65519/page-up</span> +<span id="L3820" class="LineNr">3820 </span> <span class="muControl">break-unless</span> page-up? +<span id="L3821" class="LineNr">3821 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3822" class="LineNr">3822 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L3823" class="LineNr">3823 </span> editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L3833'>page-up</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> +<span id="L3824" class="LineNr">3824 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<span id="L3825" class="LineNr">3825 </span><span class="Constant"> <end-move-cursor></span> +<span id="L3826" class="LineNr">3826 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3827" class="LineNr">3827 </span> movement?:bool <span class="Special"><-</span> not-equal top-of-screen, old-top +<span id="L3828" class="LineNr">3828 </span> <span class="Comment"># don't bother re-rendering if nothing changed. todo: test this</span> +<span id="L3829" class="LineNr">3829 </span> <span class="muControl"> return</span> movement?/go-render +<span id="L3830" class="LineNr">3830 </span> <span class="Delimiter">}</span> +<span id="L3831" class="LineNr">3831 </span>] +<span id="L3832" class="LineNr">3832 </span> +<span id="L3833" class="LineNr">3833 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L3833'>page-up</a> editor:&:editor, <a href='../081print.mu.html#L782'>screen-height</a>:num<span class="muRecipe"> -> </span>editor:&:editor [ +<span id="L3834" class="LineNr">3834 </span> <span class="Constant">local-scope</span> +<span id="L3835" class="LineNr">3835 </span> <span class="Constant">load-inputs</span> +<span id="L3836" class="LineNr">3836 </span> max:num <span class="Special"><-</span> subtract <a href='../081print.mu.html#L782'>screen-height</a>, <span class="Constant">1/menu-bar</span>, <span class="Constant">1/overlapping-line</span> +<span id="L3837" class="LineNr">3837 </span> count:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<span id="L3838" class="LineNr">3838 </span> top-of-screen:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L3839" class="LineNr">3839 </span> <span class="Delimiter">{</span> +<span id="L3840" class="LineNr">3840 </span> done?:bool <span class="Special"><-</span> greater-or-equal count, max +<span id="L3841" class="LineNr">3841 </span> <span class="muControl">break-if</span> done? +<span id="L3842" class="LineNr">3842 </span> <a href='../065duplex_list.mu.html#L38'>prev</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> top-of-screen, editor +<span id="L3843" class="LineNr">3843 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L38'>prev</a> +<span id="L3844" class="LineNr">3844 </span> top-of-screen <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L38'>prev</a> +<span id="L3845" class="LineNr">3845 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, top-of-screen +<span id="L3846" class="LineNr">3846 </span> count <span class="Special"><-</span> add count,<span class="Constant"> 1</span> +<span id="L3847" class="LineNr">3847 </span> <span class="muControl"> loop</span> +<span id="L3848" class="LineNr">3848 </span> <span class="Delimiter">}</span> +<span id="L3849" class="LineNr">3849 </span>] +<span id="L3850" class="LineNr">3850 </span> +<span id="L3851" class="LineNr">3851 </span><span class="muScenario">scenario</span> editor-can-scroll-up-multiple-pages [ +<span id="L3852" class="LineNr">3852 </span> <span class="Constant">local-scope</span> +<span id="L3853" class="LineNr">3853 </span> <span class="Comment"># screen has 1 line for menu + 3 lines</span> +<span id="L3854" class="LineNr">3854 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3855" class="LineNr">3855 </span> <span class="Comment"># initialize editor with 8 lines</span> +<span id="L3856" class="LineNr">3856 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3857" class="LineNr">3857 </span><span class="Constant">b</span> +<span id="L3858" class="LineNr">3858 </span><span class="Constant">c</span> +<span id="L3859" class="LineNr">3859 </span><span class="Constant">d</span> +<span id="L3860" class="LineNr">3860 </span><span class="Constant">e</span> +<span id="L3861" class="LineNr">3861 </span><span class="Constant">f</span> +<span id="L3862" class="LineNr">3862 </span><span class="Constant">g</span> +<span id="L3863" class="LineNr">3863 </span><span class="Constant">h]</span> +<span id="L3864" class="LineNr">3864 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L3865" class="LineNr">3865 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3866" class="LineNr">3866 </span> screen-should-contain [ +<span id="L3867" class="LineNr">3867 </span> <span class="Constant"> . .</span> +<span id="L3868" class="LineNr">3868 </span> <span class="Constant"> .a .</span> +<span id="L3869" class="LineNr">3869 </span> <span class="Constant"> .b .</span> +<span id="L3870" class="LineNr">3870 </span> <span class="Constant"> .c .</span> +<span id="L3871" class="LineNr">3871 </span> ] +<span id="L3872" class="LineNr">3872 </span> <span class="Comment"># scroll down two pages</span> +<span id="L3873" class="LineNr">3873 </span> assume-console [ +<span id="L3874" class="LineNr">3874 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3875" class="LineNr">3875 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3876" class="LineNr">3876 </span> ] +<span id="L3877" class="LineNr">3877 </span> run [ +<span id="L3878" class="LineNr">3878 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3879" class="LineNr">3879 </span> ] +<span id="L3880" class="LineNr">3880 </span> <span class="Comment"># screen shows third page</span> +<span id="L3881" class="LineNr">3881 </span> screen-should-contain [ +<span id="L3882" class="LineNr">3882 </span> <span class="Constant"> . .</span> +<span id="L3883" class="LineNr">3883 </span> <span class="Constant"> .e .</span> +<span id="L3884" class="LineNr">3884 </span> <span class="Constant"> .f .</span> +<span id="L3885" class="LineNr">3885 </span> <span class="Constant"> .g .</span> +<span id="L3886" class="LineNr">3886 </span> ] +<span id="L3887" class="LineNr">3887 </span> <span class="Comment"># scroll up</span> +<span id="L3888" class="LineNr">3888 </span> assume-console [ +<span id="L3889" class="LineNr">3889 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L3890" class="LineNr">3890 </span> ] +<span id="L3891" class="LineNr">3891 </span> run [ +<span id="L3892" class="LineNr">3892 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3893" class="LineNr">3893 </span> ] +<span id="L3894" class="LineNr">3894 </span> <span class="Comment"># screen shows second page</span> +<span id="L3895" class="LineNr">3895 </span> screen-should-contain [ +<span id="L3896" class="LineNr">3896 </span> <span class="Constant"> . .</span> +<span id="L3897" class="LineNr">3897 </span> <span class="Constant"> .c .</span> +<span id="L3898" class="LineNr">3898 </span> <span class="Constant"> .d .</span> +<span id="L3899" class="LineNr">3899 </span> <span class="Constant"> .e .</span> +<span id="L3900" class="LineNr">3900 </span> ] +<span id="L3901" class="LineNr">3901 </span> <span class="Comment"># scroll up again</span> +<span id="L3902" class="LineNr">3902 </span> assume-console [ +<span id="L3903" class="LineNr">3903 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L3904" class="LineNr">3904 </span> ] +<span id="L3905" class="LineNr">3905 </span> run [ +<span id="L3906" class="LineNr">3906 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3907" class="LineNr">3907 </span> ] +<span id="L3908" class="LineNr">3908 </span> <span class="Comment"># screen shows original page again</span> +<span id="L3909" class="LineNr">3909 </span> screen-should-contain [ +<span id="L3910" class="LineNr">3910 </span> <span class="Constant"> . .</span> +<span id="L3911" class="LineNr">3911 </span> <span class="Constant"> .a .</span> +<span id="L3912" class="LineNr">3912 </span> <span class="Constant"> .b .</span> +<span id="L3913" class="LineNr">3913 </span> <span class="Constant"> .c .</span> +<span id="L3914" class="LineNr">3914 </span> ] +<span id="L3915" class="LineNr">3915 </span>] +<span id="L3916" class="LineNr">3916 </span> +<span id="L3917" class="LineNr">3917 </span><span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines [ +<span id="L3918" class="LineNr">3918 </span> <span class="Constant">local-scope</span> +<span id="L3919" class="LineNr">3919 </span> <span class="Comment"># screen has 1 line for menu + 5 lines for text</span> +<span id="L3920" class="LineNr">3920 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">6/height</span> +<span id="L3921" class="LineNr">3921 </span> <span class="Comment"># editor contains a long line in the first page</span> +<span id="L3922" class="LineNr">3922 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3923" class="LineNr">3923 </span><span class="Constant">b</span> +<span id="L3924" class="LineNr">3924 </span><span class="Constant">cdefgh</span> +<span id="L3925" class="LineNr">3925 </span><span class="Constant">i</span> +<span id="L3926" class="LineNr">3926 </span><span class="Constant">j</span> +<span id="L3927" class="LineNr">3927 </span><span class="Constant">k</span> +<span id="L3928" class="LineNr">3928 </span><span class="Constant">l</span> +<span id="L3929" class="LineNr">3929 </span><span class="Constant">m</span> +<span id="L3930" class="LineNr">3930 </span><span class="Constant">n</span> +<span id="L3931" class="LineNr">3931 </span><span class="Constant">o]</span> +<span id="L3932" class="LineNr">3932 </span> <span class="Comment"># editor screen triggers wrap of last line</span> +<span id="L3933" class="LineNr">3933 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<span id="L3934" class="LineNr">3934 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3935" class="LineNr">3935 </span> <span class="Comment"># some part of last line is not displayed</span> +<span id="L3936" class="LineNr">3936 </span> screen-should-contain [ +<span id="L3937" class="LineNr">3937 </span> <span class="Constant"> . .</span> +<span id="L3938" class="LineNr">3938 </span> <span class="Constant"> .a .</span> +<span id="L3939" class="LineNr">3939 </span> <span class="Constant"> .b .</span> +<span id="L3940" class="LineNr">3940 </span> <span class="Constant"> .cde↩ .</span> +<span id="L3941" class="LineNr">3941 </span> <span class="Constant"> .fgh .</span> +<span id="L3942" class="LineNr">3942 </span> <span class="Constant"> .i .</span> +<span id="L3943" class="LineNr">3943 </span> ] +<span id="L3944" class="LineNr">3944 </span> <span class="Comment"># scroll down a page and a line</span> +<span id="L3945" class="LineNr">3945 </span> assume-console [ +<span id="L3946" class="LineNr">3946 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L3947" class="LineNr">3947 </span> left-click<span class="Constant"> 5</span>,<span class="Constant"> 0</span> +<span id="L3948" class="LineNr">3948 </span> press down-arrow +<span id="L3949" class="LineNr">3949 </span> ] +<span id="L3950" class="LineNr">3950 </span> run [ +<span id="L3951" class="LineNr">3951 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e <span id="L3952" class="LineNr">3952 </span> ] -<span id="L3953" class="LineNr">3953 </span> run [ -<span id="L3954" class="LineNr">3954 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3955" class="LineNr">3955 </span> ] -<span id="L3956" class="LineNr">3956 </span> <span class="Comment"># screen resets</span> -<span id="L3957" class="LineNr">3957 </span> screen-should-contain [ -<span id="L3958" class="LineNr">3958 </span> <span class="Constant"> . .</span> -<span id="L3959" class="LineNr">3959 </span> <span class="Constant"> .b .</span> -<span id="L3960" class="LineNr">3960 </span> <span class="Constant"> .cde↩ .</span> -<span id="L3961" class="LineNr">3961 </span> <span class="Constant"> .fgh .</span> -<span id="L3962" class="LineNr">3962 </span> <span class="Constant"> .i .</span> -<span id="L3963" class="LineNr">3963 </span> <span class="Constant"> .j .</span> -<span id="L3964" class="LineNr">3964 </span> ] -<span id="L3965" class="LineNr">3965 </span>] -<span id="L3966" class="LineNr">3966 </span> -<span id="L3967" class="LineNr">3967 </span><span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines-2 [ -<span id="L3968" class="LineNr">3968 </span> <span class="Constant">local-scope</span> -<span id="L3969" class="LineNr">3969 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> -<span id="L3970" class="LineNr">3970 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L3971" class="LineNr">3971 </span> <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> -<span id="L3972" class="LineNr">3972 </span> <span class="Comment"># and still has something left over</span> -<span id="L3973" class="LineNr">3973 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> -<span id="L3974" class="LineNr">3974 </span><span class="Constant">bcdefgh]</span> -<span id="L3975" class="LineNr">3975 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> -<span id="L3976" class="LineNr">3976 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L3977" class="LineNr">3977 </span> <span class="Comment"># some part of last line is not displayed</span> -<span id="L3978" class="LineNr">3978 </span> screen-should-contain [ -<span id="L3979" class="LineNr">3979 </span> <span class="Constant"> . .</span> -<span id="L3980" class="LineNr">3980 </span> <span class="Constant"> .a .</span> -<span id="L3981" class="LineNr">3981 </span> <span class="Constant"> .bcd↩ .</span> -<span id="L3982" class="LineNr">3982 </span> <span class="Constant"> .efg↩ .</span> -<span id="L3983" class="LineNr">3983 </span> ] -<span id="L3984" class="LineNr">3984 </span> <span class="Comment"># scroll down</span> -<span id="L3985" class="LineNr">3985 </span> assume-console [ -<span id="L3986" class="LineNr">3986 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L3987" class="LineNr">3987 </span> ] -<span id="L3988" class="LineNr">3988 </span> run [ -<span id="L3989" class="LineNr">3989 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L3990" class="LineNr">3990 </span> ] -<span id="L3991" class="LineNr">3991 </span> <span class="Comment"># screen shows entire wrapped line</span> -<span id="L3992" class="LineNr">3992 </span> screen-should-contain [ -<span id="L3993" class="LineNr">3993 </span> <span class="Constant"> . .</span> +<span id="L3953" class="LineNr">3953 </span> <span class="Comment"># screen shows entire wrapped line</span> +<span id="L3954" class="LineNr">3954 </span> screen-should-contain [ +<span id="L3955" class="LineNr">3955 </span> <span class="Constant"> . .</span> +<span id="L3956" class="LineNr">3956 </span> <span class="Constant"> .j .</span> +<span id="L3957" class="LineNr">3957 </span> <span class="Constant"> .k .</span> +<span id="L3958" class="LineNr">3958 </span> <span class="Constant"> .l .</span> +<span id="L3959" class="LineNr">3959 </span> <span class="Constant"> .m .</span> +<span id="L3960" class="LineNr">3960 </span> <span class="Constant"> .n .</span> +<span id="L3961" class="LineNr">3961 </span> ] +<span id="L3962" class="LineNr">3962 </span> <span class="Comment"># now scroll up one page</span> +<span id="L3963" class="LineNr">3963 </span> assume-console [ +<span id="L3964" class="LineNr">3964 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L3965" class="LineNr">3965 </span> ] +<span id="L3966" class="LineNr">3966 </span> run [ +<span id="L3967" class="LineNr">3967 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L3968" class="LineNr">3968 </span> ] +<span id="L3969" class="LineNr">3969 </span> <span class="Comment"># screen resets</span> +<span id="L3970" class="LineNr">3970 </span> screen-should-contain [ +<span id="L3971" class="LineNr">3971 </span> <span class="Constant"> . .</span> +<span id="L3972" class="LineNr">3972 </span> <span class="Constant"> .b .</span> +<span id="L3973" class="LineNr">3973 </span> <span class="Constant"> .cde↩ .</span> +<span id="L3974" class="LineNr">3974 </span> <span class="Constant"> .fgh .</span> +<span id="L3975" class="LineNr">3975 </span> <span class="Constant"> .i .</span> +<span id="L3976" class="LineNr">3976 </span> <span class="Constant"> .j .</span> +<span id="L3977" class="LineNr">3977 </span> ] +<span id="L3978" class="LineNr">3978 </span>] +<span id="L3979" class="LineNr">3979 </span> +<span id="L3980" class="LineNr">3980 </span><span class="muScenario">scenario</span> editor-can-scroll-up-wrapped-lines-2 [ +<span id="L3981" class="LineNr">3981 </span> <span class="Constant">local-scope</span> +<span id="L3982" class="LineNr">3982 </span> <span class="Comment"># screen has 1 line for menu + 3 lines for text</span> +<span id="L3983" class="LineNr">3983 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L3984" class="LineNr">3984 </span> <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span> +<span id="L3985" class="LineNr">3985 </span> <span class="Comment"># and still has something left over</span> +<span id="L3986" class="LineNr">3986 </span> s:text <span class="Special"><-</span> new <span class="Constant">[a</span> +<span id="L3987" class="LineNr">3987 </span><span class="Constant">bcdefgh]</span> +<span id="L3988" class="LineNr">3988 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<span id="L3989" class="LineNr">3989 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L3990" class="LineNr">3990 </span> <span class="Comment"># some part of last line is not displayed</span> +<span id="L3991" class="LineNr">3991 </span> screen-should-contain [ +<span id="L3992" class="LineNr">3992 </span> <span class="Constant"> . .</span> +<span id="L3993" class="LineNr">3993 </span> <span class="Constant"> .a .</span> <span id="L3994" class="LineNr">3994 </span> <span class="Constant"> .bcd↩ .</span> <span id="L3995" class="LineNr">3995 </span> <span class="Constant"> .efg↩ .</span> -<span id="L3996" class="LineNr">3996 </span> <span class="Constant"> .h .</span> -<span id="L3997" class="LineNr">3997 </span> ] -<span id="L3998" class="LineNr">3998 </span> <span class="Comment"># scroll back up</span> -<span id="L3999" class="LineNr">3999 </span> assume-console [ -<span id="L4000" class="LineNr">4000 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> -<span id="L4001" class="LineNr">4001 </span> ] -<span id="L4002" class="LineNr">4002 </span> run [ -<span id="L4003" class="LineNr">4003 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4004" class="LineNr">4004 </span> ] -<span id="L4005" class="LineNr">4005 </span> <span class="Comment"># screen resets</span> -<span id="L4006" class="LineNr">4006 </span> screen-should-contain [ -<span id="L4007" class="LineNr">4007 </span> <span class="Constant"> . .</span> -<span id="L4008" class="LineNr">4008 </span> <span class="Constant"> .a .</span> -<span id="L4009" class="LineNr">4009 </span> <span class="Constant"> .bcd↩ .</span> -<span id="L4010" class="LineNr">4010 </span> <span class="Constant"> .efg↩ .</span> -<span id="L4011" class="LineNr">4011 </span> ] -<span id="L4012" class="LineNr">4012 </span>] -<span id="L4013" class="LineNr">4013 </span> -<span id="L4014" class="LineNr">4014 </span><span class="muScenario">scenario</span> editor-can-scroll-up-past-nonempty-lines [ -<span id="L4015" class="LineNr">4015 </span> <span class="Constant">local-scope</span> -<span id="L4016" class="LineNr">4016 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L4017" class="LineNr">4017 </span> <span class="Comment"># text with empty line in second screen</span> -<span id="L4018" class="LineNr">4018 </span> s:text <span class="Special"><-</span> new <span class="Constant">[axx</span> -<span id="L4019" class="LineNr">4019 </span><span class="Constant">bxx</span> -<span id="L4020" class="LineNr">4020 </span><span class="Constant">cxx</span> -<span id="L4021" class="LineNr">4021 </span><span class="Constant">dxx</span> -<span id="L4022" class="LineNr">4022 </span><span class="Constant">exx</span> -<span id="L4023" class="LineNr">4023 </span><span class="Constant">fxx</span> -<span id="L4024" class="LineNr">4024 </span><span class="Constant">gxx</span> -<span id="L4025" class="LineNr">4025 </span><span class="Constant">hxx</span> -<span id="L4026" class="LineNr">4026 </span><span class="Constant">]</span> -<span id="L4027" class="LineNr">4027 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> -<span id="L4028" class="LineNr">4028 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4029" class="LineNr">4029 </span> screen-should-contain [ -<span id="L4030" class="LineNr">4030 </span> <span class="Constant"> . .</span> -<span id="L4031" class="LineNr">4031 </span> <span class="Constant"> .axx .</span> -<span id="L4032" class="LineNr">4032 </span> <span class="Constant"> .bxx .</span> -<span id="L4033" class="LineNr">4033 </span> <span class="Constant"> .cxx .</span> -<span id="L4034" class="LineNr">4034 </span> ] -<span id="L4035" class="LineNr">4035 </span> assume-console [ -<span id="L4036" class="LineNr">4036 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L4037" class="LineNr">4037 </span> ] -<span id="L4038" class="LineNr">4038 </span> run [ -<span id="L4039" class="LineNr">4039 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4040" class="LineNr">4040 </span> ] -<span id="L4041" class="LineNr">4041 </span> screen-should-contain [ -<span id="L4042" class="LineNr">4042 </span> <span class="Constant"> . .</span> -<span id="L4043" class="LineNr">4043 </span> <span class="Constant"> .cxx .</span> -<span id="L4044" class="LineNr">4044 </span> <span class="Constant"> .dxx .</span> -<span id="L4045" class="LineNr">4045 </span> <span class="Constant"> .exx .</span> -<span id="L4046" class="LineNr">4046 </span> ] -<span id="L4047" class="LineNr">4047 </span> assume-console [ -<span id="L4048" class="LineNr">4048 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L4049" class="LineNr">4049 </span> ] -<span id="L4050" class="LineNr">4050 </span> run [ -<span id="L4051" class="LineNr">4051 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4052" class="LineNr">4052 </span> ] -<span id="L4053" class="LineNr">4053 </span> screen-should-contain [ -<span id="L4054" class="LineNr">4054 </span> <span class="Constant"> . .</span> -<span id="L4055" class="LineNr">4055 </span> <span class="Constant"> .exx .</span> -<span id="L4056" class="LineNr">4056 </span> <span class="Constant"> .fxx .</span> -<span id="L4057" class="LineNr">4057 </span> <span class="Constant"> .gxx .</span> -<span id="L4058" class="LineNr">4058 </span> ] -<span id="L4059" class="LineNr">4059 </span> <span class="Comment"># scroll back up past empty line</span> +<span id="L3996" class="LineNr">3996 </span> ] +<span id="L3997" class="LineNr">3997 </span> <span class="Comment"># scroll down</span> +<span id="L3998" class="LineNr">3998 </span> assume-console [ +<span id="L3999" class="LineNr">3999 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L4000" class="LineNr">4000 </span> ] +<span id="L4001" class="LineNr">4001 </span> run [ +<span id="L4002" class="LineNr">4002 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4003" class="LineNr">4003 </span> ] +<span id="L4004" class="LineNr">4004 </span> <span class="Comment"># screen shows entire wrapped line</span> +<span id="L4005" class="LineNr">4005 </span> screen-should-contain [ +<span id="L4006" class="LineNr">4006 </span> <span class="Constant"> . .</span> +<span id="L4007" class="LineNr">4007 </span> <span class="Constant"> .bcd↩ .</span> +<span id="L4008" class="LineNr">4008 </span> <span class="Constant"> .efg↩ .</span> +<span id="L4009" class="LineNr">4009 </span> <span class="Constant"> .h .</span> +<span id="L4010" class="LineNr">4010 </span> ] +<span id="L4011" class="LineNr">4011 </span> <span class="Comment"># scroll back up</span> +<span id="L4012" class="LineNr">4012 </span> assume-console [ +<span id="L4013" class="LineNr">4013 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L4014" class="LineNr">4014 </span> ] +<span id="L4015" class="LineNr">4015 </span> run [ +<span id="L4016" class="LineNr">4016 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4017" class="LineNr">4017 </span> ] +<span id="L4018" class="LineNr">4018 </span> <span class="Comment"># screen resets</span> +<span id="L4019" class="LineNr">4019 </span> screen-should-contain [ +<span id="L4020" class="LineNr">4020 </span> <span class="Constant"> . .</span> +<span id="L4021" class="LineNr">4021 </span> <span class="Constant"> .a .</span> +<span id="L4022" class="LineNr">4022 </span> <span class="Constant"> .bcd↩ .</span> +<span id="L4023" class="LineNr">4023 </span> <span class="Constant"> .efg↩ .</span> +<span id="L4024" class="LineNr">4024 </span> ] +<span id="L4025" class="LineNr">4025 </span>] +<span id="L4026" class="LineNr">4026 </span> +<span id="L4027" class="LineNr">4027 </span><span class="muScenario">scenario</span> editor-can-scroll-up-past-nonempty-lines [ +<span id="L4028" class="LineNr">4028 </span> <span class="Constant">local-scope</span> +<span id="L4029" class="LineNr">4029 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L4030" class="LineNr">4030 </span> <span class="Comment"># text with empty line in second screen</span> +<span id="L4031" class="LineNr">4031 </span> s:text <span class="Special"><-</span> new <span class="Constant">[axx</span> +<span id="L4032" class="LineNr">4032 </span><span class="Constant">bxx</span> +<span id="L4033" class="LineNr">4033 </span><span class="Constant">cxx</span> +<span id="L4034" class="LineNr">4034 </span><span class="Constant">dxx</span> +<span id="L4035" class="LineNr">4035 </span><span class="Constant">exx</span> +<span id="L4036" class="LineNr">4036 </span><span class="Constant">fxx</span> +<span id="L4037" class="LineNr">4037 </span><span class="Constant">gxx</span> +<span id="L4038" class="LineNr">4038 </span><span class="Constant">hxx</span> +<span id="L4039" class="LineNr">4039 </span><span class="Constant">]</span> +<span id="L4040" class="LineNr">4040 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<span id="L4041" class="LineNr">4041 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4042" class="LineNr">4042 </span> screen-should-contain [ +<span id="L4043" class="LineNr">4043 </span> <span class="Constant"> . .</span> +<span id="L4044" class="LineNr">4044 </span> <span class="Constant"> .axx .</span> +<span id="L4045" class="LineNr">4045 </span> <span class="Constant"> .bxx .</span> +<span id="L4046" class="LineNr">4046 </span> <span class="Constant"> .cxx .</span> +<span id="L4047" class="LineNr">4047 </span> ] +<span id="L4048" class="LineNr">4048 </span> assume-console [ +<span id="L4049" class="LineNr">4049 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L4050" class="LineNr">4050 </span> ] +<span id="L4051" class="LineNr">4051 </span> run [ +<span id="L4052" class="LineNr">4052 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4053" class="LineNr">4053 </span> ] +<span id="L4054" class="LineNr">4054 </span> screen-should-contain [ +<span id="L4055" class="LineNr">4055 </span> <span class="Constant"> . .</span> +<span id="L4056" class="LineNr">4056 </span> <span class="Constant"> .cxx .</span> +<span id="L4057" class="LineNr">4057 </span> <span class="Constant"> .dxx .</span> +<span id="L4058" class="LineNr">4058 </span> <span class="Constant"> .exx .</span> +<span id="L4059" class="LineNr">4059 </span> ] <span id="L4060" class="LineNr">4060 </span> assume-console [ -<span id="L4061" class="LineNr">4061 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> +<span id="L4061" class="LineNr">4061 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> <span id="L4062" class="LineNr">4062 </span> ] <span id="L4063" class="LineNr">4063 </span> run [ <span id="L4064" class="LineNr">4064 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e <span id="L4065" class="LineNr">4065 </span> ] <span id="L4066" class="LineNr">4066 </span> screen-should-contain [ <span id="L4067" class="LineNr">4067 </span> <span class="Constant"> . .</span> -<span id="L4068" class="LineNr">4068 </span> <span class="Constant"> .cxx .</span> -<span id="L4069" class="LineNr">4069 </span> <span class="Constant"> .dxx .</span> -<span id="L4070" class="LineNr">4070 </span> <span class="Constant"> .exx .</span> +<span id="L4068" class="LineNr">4068 </span> <span class="Constant"> .exx .</span> +<span id="L4069" class="LineNr">4069 </span> <span class="Constant"> .fxx .</span> +<span id="L4070" class="LineNr">4070 </span> <span class="Constant"> .gxx .</span> <span id="L4071" class="LineNr">4071 </span> ] -<span id="L4072" class="LineNr">4072 </span>] -<span id="L4073" class="LineNr">4073 </span> -<span id="L4074" class="LineNr">4074 </span><span class="muScenario">scenario</span> editor-can-scroll-up-past-empty-lines [ -<span id="L4075" class="LineNr">4075 </span> <span class="Constant">local-scope</span> -<span id="L4076" class="LineNr">4076 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> -<span id="L4077" class="LineNr">4077 </span> <span class="Comment"># text with empty line in second screen</span> -<span id="L4078" class="LineNr">4078 </span> s:text <span class="Special"><-</span> new <span class="Constant">[axy</span> -<span id="L4079" class="LineNr">4079 </span><span class="Constant">bxy</span> -<span id="L4080" class="LineNr">4080 </span><span class="Constant">cxy</span> -<span id="L4081" class="LineNr">4081 </span> -<span id="L4082" class="LineNr">4082 </span>dxy -<span id="L4083" class="LineNr">4083 </span>exy -<span id="L4084" class="LineNr">4084 </span>fxy -<span id="L4085" class="LineNr">4085 </span>gxy -<span id="L4086" class="LineNr">4086 </span>] -<span id="L4087" class="LineNr">4087 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> -<span id="L4088" class="LineNr">4088 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4089" class="LineNr">4089 </span> screen-should-contain [ -<span id="L4090" class="LineNr">4090 </span> <span class="Constant"> . .</span> -<span id="L4091" class="LineNr">4091 </span> <span class="Constant"> .axy .</span> -<span id="L4092" class="LineNr">4092 </span> <span class="Constant"> .bxy .</span> -<span id="L4093" class="LineNr">4093 </span> <span class="Constant"> .cxy .</span> -<span id="L4094" class="LineNr">4094 </span> ] -<span id="L4095" class="LineNr">4095 </span> assume-console [ -<span id="L4096" class="LineNr">4096 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L4097" class="LineNr">4097 </span> ] -<span id="L4098" class="LineNr">4098 </span> run [ -<span id="L4099" class="LineNr">4099 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4100" class="LineNr">4100 </span> ] -<span id="L4101" class="LineNr">4101 </span> screen-should-contain [ -<span id="L4102" class="LineNr">4102 </span> <span class="Constant"> . .</span> -<span id="L4103" class="LineNr">4103 </span> <span class="Constant"> .cxy .</span> -<span id="L4104" class="LineNr">4104 </span> <span class="Constant"> . .</span> -<span id="L4105" class="LineNr">4105 </span> <span class="Constant"> .dxy .</span> -<span id="L4106" class="LineNr">4106 </span> ] -<span id="L4107" class="LineNr">4107 </span> assume-console [ -<span id="L4108" class="LineNr">4108 </span> press <a href='003-shortcuts.mu.html#L3597'>page-down</a> -<span id="L4109" class="LineNr">4109 </span> ] -<span id="L4110" class="LineNr">4110 </span> run [ -<span id="L4111" class="LineNr">4111 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4112" class="LineNr">4112 </span> ] -<span id="L4113" class="LineNr">4113 </span> screen-should-contain [ -<span id="L4114" class="LineNr">4114 </span> <span class="Constant"> . .</span> -<span id="L4115" class="LineNr">4115 </span> <span class="Constant"> .dxy .</span> -<span id="L4116" class="LineNr">4116 </span> <span class="Constant"> .exy .</span> -<span id="L4117" class="LineNr">4117 </span> <span class="Constant"> .fxy .</span> -<span id="L4118" class="LineNr">4118 </span> ] -<span id="L4119" class="LineNr">4119 </span> <span class="Comment"># scroll back up past empty line</span> +<span id="L4072" class="LineNr">4072 </span> <span class="Comment"># scroll back up past empty line</span> +<span id="L4073" class="LineNr">4073 </span> assume-console [ +<span id="L4074" class="LineNr">4074 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L4075" class="LineNr">4075 </span> ] +<span id="L4076" class="LineNr">4076 </span> run [ +<span id="L4077" class="LineNr">4077 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4078" class="LineNr">4078 </span> ] +<span id="L4079" class="LineNr">4079 </span> screen-should-contain [ +<span id="L4080" class="LineNr">4080 </span> <span class="Constant"> . .</span> +<span id="L4081" class="LineNr">4081 </span> <span class="Constant"> .cxx .</span> +<span id="L4082" class="LineNr">4082 </span> <span class="Constant"> .dxx .</span> +<span id="L4083" class="LineNr">4083 </span> <span class="Constant"> .exx .</span> +<span id="L4084" class="LineNr">4084 </span> ] +<span id="L4085" class="LineNr">4085 </span>] +<span id="L4086" class="LineNr">4086 </span> +<span id="L4087" class="LineNr">4087 </span><span class="muScenario">scenario</span> editor-can-scroll-up-past-empty-lines [ +<span id="L4088" class="LineNr">4088 </span> <span class="Constant">local-scope</span> +<span id="L4089" class="LineNr">4089 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span> +<span id="L4090" class="LineNr">4090 </span> <span class="Comment"># text with empty line in second screen</span> +<span id="L4091" class="LineNr">4091 </span> s:text <span class="Special"><-</span> new <span class="Constant">[axy</span> +<span id="L4092" class="LineNr">4092 </span><span class="Constant">bxy</span> +<span id="L4093" class="LineNr">4093 </span><span class="Constant">cxy</span> +<span id="L4094" class="LineNr">4094 </span> +<span id="L4095" class="LineNr">4095 </span>dxy +<span id="L4096" class="LineNr">4096 </span>exy +<span id="L4097" class="LineNr">4097 </span>fxy +<span id="L4098" class="LineNr">4098 </span>gxy +<span id="L4099" class="LineNr">4099 </span>] +<span id="L4100" class="LineNr">4100 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> s, <span class="Constant">0/left</span>, <span class="Constant">4/right</span> +<span id="L4101" class="LineNr">4101 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4102" class="LineNr">4102 </span> screen-should-contain [ +<span id="L4103" class="LineNr">4103 </span> <span class="Constant"> . .</span> +<span id="L4104" class="LineNr">4104 </span> <span class="Constant"> .axy .</span> +<span id="L4105" class="LineNr">4105 </span> <span class="Constant"> .bxy .</span> +<span id="L4106" class="LineNr">4106 </span> <span class="Constant"> .cxy .</span> +<span id="L4107" class="LineNr">4107 </span> ] +<span id="L4108" class="LineNr">4108 </span> assume-console [ +<span id="L4109" class="LineNr">4109 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> +<span id="L4110" class="LineNr">4110 </span> ] +<span id="L4111" class="LineNr">4111 </span> run [ +<span id="L4112" class="LineNr">4112 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4113" class="LineNr">4113 </span> ] +<span id="L4114" class="LineNr">4114 </span> screen-should-contain [ +<span id="L4115" class="LineNr">4115 </span> <span class="Constant"> . .</span> +<span id="L4116" class="LineNr">4116 </span> <span class="Constant"> .cxy .</span> +<span id="L4117" class="LineNr">4117 </span> <span class="Constant"> . .</span> +<span id="L4118" class="LineNr">4118 </span> <span class="Constant"> .dxy .</span> +<span id="L4119" class="LineNr">4119 </span> ] <span id="L4120" class="LineNr">4120 </span> assume-console [ -<span id="L4121" class="LineNr">4121 </span> press <a href='003-shortcuts.mu.html#L3820'>page-up</a> +<span id="L4121" class="LineNr">4121 </span> press <a href='003-shortcuts.mu.html#L3610'>page-down</a> <span id="L4122" class="LineNr">4122 </span> ] <span id="L4123" class="LineNr">4123 </span> run [ <span id="L4124" class="LineNr">4124 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e <span id="L4125" class="LineNr">4125 </span> ] <span id="L4126" class="LineNr">4126 </span> screen-should-contain [ <span id="L4127" class="LineNr">4127 </span> <span class="Constant"> . .</span> -<span id="L4128" class="LineNr">4128 </span> <span class="Constant"> .cxy .</span> -<span id="L4129" class="LineNr">4129 </span> <span class="Constant"> . .</span> -<span id="L4130" class="LineNr">4130 </span> <span class="Constant"> .dxy .</span> +<span id="L4128" class="LineNr">4128 </span> <span class="Constant"> .dxy .</span> +<span id="L4129" class="LineNr">4129 </span> <span class="Constant"> .exy .</span> +<span id="L4130" class="LineNr">4130 </span> <span class="Constant"> .fxy .</span> <span id="L4131" class="LineNr">4131 </span> ] -<span id="L4132" class="LineNr">4132 </span>] -<span id="L4133" class="LineNr">4133 </span> -<span id="L4134" class="LineNr">4134 </span><span class="Comment"># ctrl-s - scroll up by one line</span> -<span id="L4135" class="LineNr">4135 </span><span class="Comment"># todo: scenarios</span> -<span id="L4136" class="LineNr">4136 </span> -<span id="L4137" class="LineNr">4137 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ -<span id="L4138" class="LineNr">4138 </span> <span class="Delimiter">{</span> -<span id="L4139" class="LineNr">4139 </span> scroll-up?:bool <span class="Special"><-</span> equal c, <span class="Constant">19/ctrl-s</span> -<span id="L4140" class="LineNr">4140 </span> <span class="muControl">break-unless</span> scroll-up? -<span id="L4141" class="LineNr">4141 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L4142" class="LineNr">4142 </span> go-render?:bool, editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4149'>line-up</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> -<span id="L4143" class="LineNr">4143 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">5/line-up</span> -<span id="L4144" class="LineNr">4144 </span><span class="Constant"> <end-move-cursor></span> -<span id="L4145" class="LineNr">4145 </span> <span class="muControl"> return</span> go-render? -<span id="L4146" class="LineNr">4146 </span> <span class="Delimiter">}</span> -<span id="L4147" class="LineNr">4147 </span>] -<span id="L4148" class="LineNr">4148 </span> -<span id="L4149" class="LineNr">4149 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4149'>line-up</a> editor:&:editor, <a href='../081print.mu.html#L782'>screen-height</a>:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ -<span id="L4150" class="LineNr">4150 </span> <span class="Constant">local-scope</span> -<span id="L4151" class="LineNr">4151 </span> <span class="Constant">load-inputs</span> -<span id="L4152" class="LineNr">4152 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> -<span id="L4153" class="LineNr">4153 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> -<span id="L4154" class="LineNr">4154 </span> max:num <span class="Special"><-</span> subtract right, left -<span id="L4155" class="LineNr">4155 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L4156" class="LineNr">4156 </span> new-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L2849'>before-start-of-next-line</a> old-top, max -<span id="L4157" class="LineNr">4157 </span> movement?:bool <span class="Special"><-</span> not-equal old-top, new-top -<span id="L4158" class="LineNr">4158 </span> <span class="Delimiter">{</span> -<span id="L4159" class="LineNr">4159 </span> <span class="muControl">break-unless</span> movement? -<span id="L4160" class="LineNr">4160 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, new-top -<span id="L4161" class="LineNr">4161 </span> <span class="Delimiter">}</span> -<span id="L4162" class="LineNr">4162 </span> <span class="muControl"> return</span> movement? -<span id="L4163" class="LineNr">4163 </span>] -<span id="L4164" class="LineNr">4164 </span> -<span id="L4165" class="LineNr">4165 </span><span class="Comment"># ctrl-x - scroll down by one line</span> -<span id="L4166" class="LineNr">4166 </span><span class="Comment"># todo: scenarios</span> -<span id="L4167" class="LineNr">4167 </span> -<span id="L4168" class="LineNr">4168 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ -<span id="L4169" class="LineNr">4169 </span> <span class="Delimiter">{</span> -<span id="L4170" class="LineNr">4170 </span> scroll-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">24/ctrl-x</span> -<span id="L4171" class="LineNr">4171 </span> <span class="muControl">break-unless</span> scroll-down? -<span id="L4172" class="LineNr">4172 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L4173" class="LineNr">4173 </span> go-render?:bool, editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4180'>line-down</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> -<span id="L4174" class="LineNr">4174 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">6/line-down</span> -<span id="L4175" class="LineNr">4175 </span><span class="Constant"> <end-move-cursor></span> -<span id="L4176" class="LineNr">4176 </span> <span class="muControl"> return</span> go-render? -<span id="L4177" class="LineNr">4177 </span> <span class="Delimiter">}</span> -<span id="L4178" class="LineNr">4178 </span>] -<span id="L4179" class="LineNr">4179 </span> -<span id="L4180" class="LineNr">4180 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4180'>line-down</a> editor:&:editor, <a href='../081print.mu.html#L782'>screen-height</a>:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ -<span id="L4181" class="LineNr">4181 </span> <span class="Constant">local-scope</span> -<span id="L4182" class="LineNr">4182 </span> <span class="Constant">load-inputs</span> -<span id="L4183" class="LineNr">4183 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L4184" class="LineNr">4184 </span> new-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> old-top, editor -<span id="L4185" class="LineNr">4185 </span> movement?:bool <span class="Special"><-</span> not-equal old-top, new-top -<span id="L4186" class="LineNr">4186 </span> <span class="Delimiter">{</span> -<span id="L4187" class="LineNr">4187 </span> <span class="muControl">break-unless</span> movement? -<span id="L4188" class="LineNr">4188 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, new-top -<span id="L4189" class="LineNr">4189 </span> <span class="Delimiter">}</span> -<span id="L4190" class="LineNr">4190 </span> <span class="muControl"> return</span> movement? +<span id="L4132" class="LineNr">4132 </span> <span class="Comment"># scroll back up past empty line</span> +<span id="L4133" class="LineNr">4133 </span> assume-console [ +<span id="L4134" class="LineNr">4134 </span> press <a href='003-shortcuts.mu.html#L3833'>page-up</a> +<span id="L4135" class="LineNr">4135 </span> ] +<span id="L4136" class="LineNr">4136 </span> run [ +<span id="L4137" class="LineNr">4137 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4138" class="LineNr">4138 </span> ] +<span id="L4139" class="LineNr">4139 </span> screen-should-contain [ +<span id="L4140" class="LineNr">4140 </span> <span class="Constant"> . .</span> +<span id="L4141" class="LineNr">4141 </span> <span class="Constant"> .cxy .</span> +<span id="L4142" class="LineNr">4142 </span> <span class="Constant"> . .</span> +<span id="L4143" class="LineNr">4143 </span> <span class="Constant"> .dxy .</span> +<span id="L4144" class="LineNr">4144 </span> ] +<span id="L4145" class="LineNr">4145 </span>] +<span id="L4146" class="LineNr">4146 </span> +<span id="L4147" class="LineNr">4147 </span><span class="Comment"># ctrl-s - scroll up by one line</span> +<span id="L4148" class="LineNr">4148 </span><span class="Comment"># todo: scenarios</span> +<span id="L4149" class="LineNr">4149 </span> +<span id="L4150" class="LineNr">4150 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ +<span id="L4151" class="LineNr">4151 </span> <span class="Delimiter">{</span> +<span id="L4152" class="LineNr">4152 </span> scroll-up?:bool <span class="Special"><-</span> equal c, <span class="Constant">19/ctrl-s</span> +<span id="L4153" class="LineNr">4153 </span> <span class="muControl">break-unless</span> scroll-up? +<span id="L4154" class="LineNr">4154 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L4155" class="LineNr">4155 </span> go-render?:bool, editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4162'>line-up</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> +<span id="L4156" class="LineNr">4156 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">5/line-up</span> +<span id="L4157" class="LineNr">4157 </span><span class="Constant"> <end-move-cursor></span> +<span id="L4158" class="LineNr">4158 </span> <span class="muControl"> return</span> go-render? +<span id="L4159" class="LineNr">4159 </span> <span class="Delimiter">}</span> +<span id="L4160" class="LineNr">4160 </span>] +<span id="L4161" class="LineNr">4161 </span> +<span id="L4162" class="LineNr">4162 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4162'>line-up</a> editor:&:editor, <a href='../081print.mu.html#L782'>screen-height</a>:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ +<span id="L4163" class="LineNr">4163 </span> <span class="Constant">local-scope</span> +<span id="L4164" class="LineNr">4164 </span> <span class="Constant">load-inputs</span> +<span id="L4165" class="LineNr">4165 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<span id="L4166" class="LineNr">4166 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<span id="L4167" class="LineNr">4167 </span> max:num <span class="Special"><-</span> subtract right, left +<span id="L4168" class="LineNr">4168 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L4169" class="LineNr">4169 </span> new-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L2862'>before-start-of-next-line</a> old-top, max +<span id="L4170" class="LineNr">4170 </span> movement?:bool <span class="Special"><-</span> not-equal old-top, new-top +<span id="L4171" class="LineNr">4171 </span> <span class="Delimiter">{</span> +<span id="L4172" class="LineNr">4172 </span> <span class="muControl">break-unless</span> movement? +<span id="L4173" class="LineNr">4173 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, new-top +<span id="L4174" class="LineNr">4174 </span> <span class="Delimiter">}</span> +<span id="L4175" class="LineNr">4175 </span> <span class="muControl"> return</span> movement? +<span id="L4176" class="LineNr">4176 </span>] +<span id="L4177" class="LineNr">4177 </span> +<span id="L4178" class="LineNr">4178 </span><span class="Comment"># ctrl-x - scroll down by one line</span> +<span id="L4179" class="LineNr">4179 </span><span class="Comment"># todo: scenarios</span> +<span id="L4180" class="LineNr">4180 </span> +<span id="L4181" class="LineNr">4181 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ +<span id="L4182" class="LineNr">4182 </span> <span class="Delimiter">{</span> +<span id="L4183" class="LineNr">4183 </span> scroll-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">24/ctrl-x</span> +<span id="L4184" class="LineNr">4184 </span> <span class="muControl">break-unless</span> scroll-down? +<span id="L4185" class="LineNr">4185 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L4186" class="LineNr">4186 </span> go-render?:bool, editor <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4193'>line-down</a> editor, <a href='../081print.mu.html#L782'>screen-height</a> +<span id="L4187" class="LineNr">4187 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">6/line-down</span> +<span id="L4188" class="LineNr">4188 </span><span class="Constant"> <end-move-cursor></span> +<span id="L4189" class="LineNr">4189 </span> <span class="muControl"> return</span> go-render? +<span id="L4190" class="LineNr">4190 </span> <span class="Delimiter">}</span> <span id="L4191" class="LineNr">4191 </span>] <span id="L4192" class="LineNr">4192 </span> -<span id="L4193" class="LineNr">4193 </span><span class="Comment"># ctrl-t - move current line to top of screen</span> -<span id="L4194" class="LineNr">4194 </span><span class="Comment"># todo: scenarios</span> -<span id="L4195" class="LineNr">4195 </span> -<span id="L4196" class="LineNr">4196 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ -<span id="L4197" class="LineNr">4197 </span> <span class="Delimiter">{</span> -<span id="L4198" class="LineNr">4198 </span> scroll-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">20/ctrl-t</span> -<span id="L4199" class="LineNr">4199 </span> <span class="muControl">break-unless</span> scroll-down? -<span id="L4200" class="LineNr">4200 </span><span class="Constant"> <begin-move-cursor></span> -<span id="L4201" class="LineNr">4201 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> -<span id="L4202" class="LineNr">4202 </span> cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> -<span id="L4203" class="LineNr">4203 </span> cursor <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> cursor -<span id="L4204" class="LineNr">4204 </span> new-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> cursor, editor -<span id="L4205" class="LineNr">4205 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, new-top -<span id="L4206" class="LineNr">4206 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>,<span class="Constant"> 1</span> -<span id="L4207" class="LineNr">4207 </span> go-render?:bool <span class="Special"><-</span> not-equal new-top, old-top -<span id="L4208" class="LineNr">4208 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> -<span id="L4209" class="LineNr">4209 </span><span class="Constant"> <end-move-cursor></span> -<span id="L4210" class="LineNr">4210 </span> <span class="muControl"> return</span> go-render? -<span id="L4211" class="LineNr">4211 </span> <span class="Delimiter">}</span> -<span id="L4212" class="LineNr">4212 </span>] -<span id="L4213" class="LineNr">4213 </span> -<span id="L4214" class="LineNr">4214 </span><span class="Comment"># ctrl-/ - comment/uncomment current line</span> -<span id="L4215" class="LineNr">4215 </span> -<span id="L4216" class="LineNr">4216 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ -<span id="L4217" class="LineNr">4217 </span> <span class="Delimiter">{</span> -<span id="L4218" class="LineNr">4218 </span> comment-toggle?:bool <span class="Special"><-</span> equal c, <span class="Constant">31/ctrl-slash</span> -<span id="L4219" class="LineNr">4219 </span> <span class="muControl">break-unless</span> comment-toggle? -<span id="L4220" class="LineNr">4220 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> -<span id="L4221" class="LineNr">4221 </span> data:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> -<span id="L4222" class="LineNr">4222 </span><span class="Constant"> <begin-insert-character></span> -<span id="L4223" class="LineNr">4223 </span> before-line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4280'>before-start-of-screen-line</a> editor -<span id="L4224" class="LineNr">4224 </span> line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-line-start -<span id="L4225" class="LineNr">4225 </span> commented-out?:bool <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L585'>match</a> line-start, <span class="Constant">[#? ]</span> <span class="Comment"># comment prefix</span> -<span id="L4226" class="LineNr">4226 </span> <span class="Delimiter">{</span> -<span id="L4227" class="LineNr">4227 </span> <span class="muControl">break-unless</span> commented-out? -<span id="L4228" class="LineNr">4228 </span> <span class="Comment"># uncomment</span> -<span id="L4229" class="LineNr">4229 </span> data <span class="Special"><-</span> remove line-start, <span class="Constant">3/length-comment-prefix</span>, data -<span id="L4230" class="LineNr">4230 </span> cursor-column <span class="Special"><-</span> subtract cursor-column, <span class="Constant">3/length-comment-prefix</span> -<span id="L4231" class="LineNr">4231 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column -<span id="L4232" class="LineNr">4232 </span> go-render? <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4250'>render-line-from-start</a> <a href='../081print.mu.html#L16'>screen</a>, editor, <span class="Constant">3/size-of-comment-leader</span> -<span id="L4233" class="LineNr">4233 </span> <span class="Delimiter">}</span> -<span id="L4234" class="LineNr">4234 </span> <span class="Delimiter">{</span> -<span id="L4235" class="LineNr">4235 </span> <span class="muControl">break-if</span> commented-out? -<span id="L4236" class="LineNr">4236 </span> <span class="Comment"># comment</span> -<span id="L4237" class="LineNr">4237 </span> insert before-line-start, <span class="Constant">[#? ]</span> -<span id="L4238" class="LineNr">4238 </span> cursor-column <span class="Special"><-</span> add cursor-column, <span class="Constant">3/length-comment-prefix</span> -<span id="L4239" class="LineNr">4239 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column -<span id="L4240" class="LineNr">4240 </span> go-render? <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4250'>render-line-from-start</a> <a href='../081print.mu.html#L16'>screen</a>, editor,<span class="Constant"> 0</span> -<span id="L4241" class="LineNr">4241 </span> <span class="Delimiter">}</span> -<span id="L4242" class="LineNr">4242 </span><span class="Constant"> <end-insert-character></span> -<span id="L4243" class="LineNr">4243 </span> <span class="muControl"> return</span> -<span id="L4244" class="LineNr">4244 </span> <span class="Delimiter">}</span> -<span id="L4245" class="LineNr">4245 </span>] -<span id="L4246" class="LineNr">4246 </span> -<span id="L4247" class="LineNr">4247 </span><span class="Comment"># Render just from the start of the current line, and only if it wasn't</span> -<span id="L4248" class="LineNr">4248 </span><span class="Comment"># wrapping before (include margin) and isn't wrapping now. Otherwise just tell</span> -<span id="L4249" class="LineNr">4249 </span><span class="Comment"># the caller to go-render? the entire screen.</span> -<span id="L4250" class="LineNr">4250 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4250'>render-line-from-start</a> <a href='../081print.mu.html#L16'>screen</a>:&:<a href='../081print.mu.html#L16'>screen</a>, editor:&:editor, right-margin:num<span class="muRecipe"> -> </span>go-render?:bool, <a href='../081print.mu.html#L16'>screen</a>:&:<a href='../081print.mu.html#L16'>screen</a> [ -<span id="L4251" class="LineNr">4251 </span> <span class="Constant">local-scope</span> -<span id="L4252" class="LineNr">4252 </span> <span class="Constant">load-inputs</span> -<span id="L4253" class="LineNr">4253 </span> before-line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4280'>before-start-of-screen-line</a> editor -<span id="L4254" class="LineNr">4254 </span> line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> before-line-start -<span id="L4255" class="LineNr">4255 </span> color:num <span class="Special"><-</span> copy <span class="Constant">7/white</span> -<span id="L4256" class="LineNr">4256 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> -<span id="L4257" class="LineNr">4257 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> -<span id="L4258" class="LineNr">4258 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, cursor-row, left -<span id="L4259" class="LineNr">4259 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> -<span id="L4260" class="LineNr">4260 </span> end:num <span class="Special"><-</span> subtract right, right-margin -<span id="L4261" class="LineNr">4261 </span> i:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> -<span id="L4262" class="LineNr">4262 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy line-start -<span id="L4263" class="LineNr">4263 </span> <span class="Delimiter">{</span> -<span id="L4264" class="LineNr">4264 </span> render-all?:bool <span class="Special"><-</span> greater-or-equal i, end -<span id="L4265" class="LineNr">4265 </span> <span class="muControl">return-if</span> render-all?, <span class="Constant">1/go-render</span> -<span id="L4266" class="LineNr">4266 </span> <span class="muControl">break-unless</span> curr -<span id="L4267" class="LineNr">4267 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> -<span id="L4268" class="LineNr">4268 </span> newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> -<span id="L4269" class="LineNr">4269 </span> <span class="muControl">break-if</span> newline? -<span id="L4270" class="LineNr">4270 </span> color <span class="Special"><-</span> <a href='001-editor.mu.html#L398'>get-color</a> color, c -<span id="L4271" class="LineNr">4271 </span> print <a href='../081print.mu.html#L16'>screen</a>, c, color -<span id="L4272" class="LineNr">4272 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> curr -<span id="L4273" class="LineNr">4273 </span> i <span class="Special"><-</span> add i,<span class="Constant"> 1</span> -<span id="L4274" class="LineNr">4274 </span> <span class="muControl"> loop</span> -<span id="L4275" class="LineNr">4275 </span> <span class="Delimiter">}</span> -<span id="L4276" class="LineNr">4276 </span> <a href='../081print.mu.html#L553'>clear-line-until</a> <a href='../081print.mu.html#L16'>screen</a>, right -<span id="L4277" class="LineNr">4277 </span> <span class="muControl"> return</span> <span class="Constant">0/dont-render</span> -<span id="L4278" class="LineNr">4278 </span>] -<span id="L4279" class="LineNr">4279 </span> -<span id="L4280" class="LineNr">4280 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4280'>before-start-of-screen-line</a> editor:&:editor<span class="muRecipe"> -> </span>result:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char [ -<span id="L4281" class="LineNr">4281 </span> <span class="Constant">local-scope</span> -<span id="L4282" class="LineNr">4282 </span> <span class="Constant">load-inputs</span> -<span id="L4283" class="LineNr">4283 </span> cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> -<span id="L4284" class="LineNr">4284 </span> <span class="Delimiter">{</span> -<span id="L4285" class="LineNr">4285 </span> <a href='../065duplex_list.mu.html#L25'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L25'>next</a> cursor -<span id="L4286" class="LineNr">4286 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L25'>next</a> -<span id="L4287" class="LineNr">4287 </span> cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L25'>next</a> +<span id="L4193" class="LineNr">4193 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4193'>line-down</a> editor:&:editor, <a href='../081print.mu.html#L782'>screen-height</a>:num<span class="muRecipe"> -> </span>go-render?:bool, editor:&:editor [ +<span id="L4194" class="LineNr">4194 </span> <span class="Constant">local-scope</span> +<span id="L4195" class="LineNr">4195 </span> <span class="Constant">load-inputs</span> +<span id="L4196" class="LineNr">4196 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L4197" class="LineNr">4197 </span> new-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> old-top, editor +<span id="L4198" class="LineNr">4198 </span> movement?:bool <span class="Special"><-</span> not-equal old-top, new-top +<span id="L4199" class="LineNr">4199 </span> <span class="Delimiter">{</span> +<span id="L4200" class="LineNr">4200 </span> <span class="muControl">break-unless</span> movement? +<span id="L4201" class="LineNr">4201 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, new-top +<span id="L4202" class="LineNr">4202 </span> <span class="Delimiter">}</span> +<span id="L4203" class="LineNr">4203 </span> <span class="muControl"> return</span> movement? +<span id="L4204" class="LineNr">4204 </span>] +<span id="L4205" class="LineNr">4205 </span> +<span id="L4206" class="LineNr">4206 </span><span class="Comment"># ctrl-t - move current line to top of screen</span> +<span id="L4207" class="LineNr">4207 </span><span class="Comment"># todo: scenarios</span> +<span id="L4208" class="LineNr">4208 </span> +<span id="L4209" class="LineNr">4209 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ +<span id="L4210" class="LineNr">4210 </span> <span class="Delimiter">{</span> +<span id="L4211" class="LineNr">4211 </span> scroll-down?:bool <span class="Special"><-</span> equal c, <span class="Constant">20/ctrl-t</span> +<span id="L4212" class="LineNr">4212 </span> <span class="muControl">break-unless</span> scroll-down? +<span id="L4213" class="LineNr">4213 </span><span class="Constant"> <begin-move-cursor></span> +<span id="L4214" class="LineNr">4214 </span> old-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">top-of-screen:offset</span> +<span id="L4215" class="LineNr">4215 </span> cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<span id="L4216" class="LineNr">4216 </span> cursor <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> cursor +<span id="L4217" class="LineNr">4217 </span> new-top:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> cursor, editor +<span id="L4218" class="LineNr">4218 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">top-of-screen:offset</span>, new-top +<span id="L4219" class="LineNr">4219 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-row:offset</span>,<span class="Constant"> 1</span> +<span id="L4220" class="LineNr">4220 </span> go-render?:bool <span class="Special"><-</span> not-equal new-top, old-top +<span id="L4221" class="LineNr">4221 </span> undo-coalesce-tag:num <span class="Special"><-</span> copy <span class="Constant">0/never</span> +<span id="L4222" class="LineNr">4222 </span><span class="Constant"> <end-move-cursor></span> +<span id="L4223" class="LineNr">4223 </span> <span class="muControl"> return</span> go-render? +<span id="L4224" class="LineNr">4224 </span> <span class="Delimiter">}</span> +<span id="L4225" class="LineNr">4225 </span>] +<span id="L4226" class="LineNr">4226 </span> +<span id="L4227" class="LineNr">4227 </span><span class="Comment"># ctrl-/ - comment/uncomment current line</span> +<span id="L4228" class="LineNr">4228 </span> +<span id="L4229" class="LineNr">4229 </span><span class="muRecipe">after</span> <span class="Constant"><a href='002-typing.mu.html#L185'><handle-special-character></a></span> [ +<span id="L4230" class="LineNr">4230 </span> <span class="Delimiter">{</span> +<span id="L4231" class="LineNr">4231 </span> comment-toggle?:bool <span class="Special"><-</span> equal c, <span class="Constant">31/ctrl-slash</span> +<span id="L4232" class="LineNr">4232 </span> <span class="muControl">break-unless</span> comment-toggle? +<span id="L4233" class="LineNr">4233 </span> cursor-column:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-column:offset</span> +<span id="L4234" class="LineNr">4234 </span> data:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">data:offset</span> +<span id="L4235" class="LineNr">4235 </span><span class="Constant"> <begin-insert-character></span> +<span id="L4236" class="LineNr">4236 </span> before-line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4293'>before-start-of-screen-line</a> editor +<span id="L4237" class="LineNr">4237 </span> line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-line-start +<span id="L4238" class="LineNr">4238 </span> commented-out?:bool <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L642'>match</a> line-start, <span class="Constant">[#? ]</span> <span class="Comment"># comment prefix</span> +<span id="L4239" class="LineNr">4239 </span> <span class="Delimiter">{</span> +<span id="L4240" class="LineNr">4240 </span> <span class="muControl">break-unless</span> commented-out? +<span id="L4241" class="LineNr">4241 </span> <span class="Comment"># uncomment</span> +<span id="L4242" class="LineNr">4242 </span> data <span class="Special"><-</span> remove line-start, <span class="Constant">3/length-comment-prefix</span>, data +<span id="L4243" class="LineNr">4243 </span> cursor-column <span class="Special"><-</span> subtract cursor-column, <span class="Constant">3/length-comment-prefix</span> +<span id="L4244" class="LineNr">4244 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<span id="L4245" class="LineNr">4245 </span> go-render? <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4263'>render-line-from-start</a> <a href='../081print.mu.html#L16'>screen</a>, editor, <span class="Constant">3/size-of-comment-leader</span> +<span id="L4246" class="LineNr">4246 </span> <span class="Delimiter">}</span> +<span id="L4247" class="LineNr">4247 </span> <span class="Delimiter">{</span> +<span id="L4248" class="LineNr">4248 </span> <span class="muControl">break-if</span> commented-out? +<span id="L4249" class="LineNr">4249 </span> <span class="Comment"># comment</span> +<span id="L4250" class="LineNr">4250 </span> insert before-line-start, <span class="Constant">[#? ]</span> +<span id="L4251" class="LineNr">4251 </span> cursor-column <span class="Special"><-</span> add cursor-column, <span class="Constant">3/length-comment-prefix</span> +<span id="L4252" class="LineNr">4252 </span> *editor <span class="Special"><-</span> put *editor, <span class="Constant">cursor-column:offset</span>, cursor-column +<span id="L4253" class="LineNr">4253 </span> go-render? <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4263'>render-line-from-start</a> <a href='../081print.mu.html#L16'>screen</a>, editor,<span class="Constant"> 0</span> +<span id="L4254" class="LineNr">4254 </span> <span class="Delimiter">}</span> +<span id="L4255" class="LineNr">4255 </span><span class="Constant"> <end-insert-character></span> +<span id="L4256" class="LineNr">4256 </span> <span class="muControl"> return</span> +<span id="L4257" class="LineNr">4257 </span> <span class="Delimiter">}</span> +<span id="L4258" class="LineNr">4258 </span>] +<span id="L4259" class="LineNr">4259 </span> +<span id="L4260" class="LineNr">4260 </span><span class="Comment"># Render just from the start of the current line, and only if it wasn't</span> +<span id="L4261" class="LineNr">4261 </span><span class="Comment"># wrapping before (include margin) and isn't wrapping now. Otherwise just tell</span> +<span id="L4262" class="LineNr">4262 </span><span class="Comment"># the caller to go-render? the entire screen.</span> +<span id="L4263" class="LineNr">4263 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4263'>render-line-from-start</a> <a href='../081print.mu.html#L16'>screen</a>:&:<a href='../081print.mu.html#L16'>screen</a>, editor:&:editor, right-margin:num<span class="muRecipe"> -> </span>go-render?:bool, <a href='../081print.mu.html#L16'>screen</a>:&:<a href='../081print.mu.html#L16'>screen</a> [ +<span id="L4264" class="LineNr">4264 </span> <span class="Constant">local-scope</span> +<span id="L4265" class="LineNr">4265 </span> <span class="Constant">load-inputs</span> +<span id="L4266" class="LineNr">4266 </span> before-line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L4293'>before-start-of-screen-line</a> editor +<span id="L4267" class="LineNr">4267 </span> line-start:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> before-line-start +<span id="L4268" class="LineNr">4268 </span> color:num <span class="Special"><-</span> copy <span class="Constant">7/white</span> +<span id="L4269" class="LineNr">4269 </span> left:num <span class="Special"><-</span> get *editor, <span class="Constant">left:offset</span> +<span id="L4270" class="LineNr">4270 </span> cursor-row:num <span class="Special"><-</span> get *editor, <span class="Constant">cursor-row:offset</span> +<span id="L4271" class="LineNr">4271 </span> <a href='../081print.mu.html#L16'>screen</a> <span class="Special"><-</span> move-cursor <a href='../081print.mu.html#L16'>screen</a>, cursor-row, left +<span id="L4272" class="LineNr">4272 </span> right:num <span class="Special"><-</span> get *editor, <span class="Constant">right:offset</span> +<span id="L4273" class="LineNr">4273 </span> end:num <span class="Special"><-</span> subtract right, right-margin +<span id="L4274" class="LineNr">4274 </span> i:num <span class="Special"><-</span> copy<span class="Constant"> 0</span> +<span id="L4275" class="LineNr">4275 </span> curr:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> copy line-start +<span id="L4276" class="LineNr">4276 </span> <span class="Delimiter">{</span> +<span id="L4277" class="LineNr">4277 </span> render-all?:bool <span class="Special"><-</span> greater-or-equal i, end +<span id="L4278" class="LineNr">4278 </span> <span class="muControl">return-if</span> render-all?,<span class="Constant"> true/go-render</span> +<span id="L4279" class="LineNr">4279 </span> <span class="muControl">break-unless</span> curr +<span id="L4280" class="LineNr">4280 </span> c:char <span class="Special"><-</span> get *curr, <span class="Constant">value:offset</span> +<span id="L4281" class="LineNr">4281 </span> newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span> +<span id="L4282" class="LineNr">4282 </span> <span class="muControl">break-if</span> newline? +<span id="L4283" class="LineNr">4283 </span> color <span class="Special"><-</span> <a href='001-editor.mu.html#L400'>get-color</a> color, c +<span id="L4284" class="LineNr">4284 </span> print <a href='../081print.mu.html#L16'>screen</a>, c, color +<span id="L4285" class="LineNr">4285 </span> curr <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> curr +<span id="L4286" class="LineNr">4286 </span> i <span class="Special"><-</span> add i,<span class="Constant"> 1</span> +<span id="L4287" class="LineNr">4287 </span> <span class="muControl"> loop</span> <span id="L4288" class="LineNr">4288 </span> <span class="Delimiter">}</span> -<span id="L4289" class="LineNr">4289 </span> result <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> cursor, editor -<span id="L4290" class="LineNr">4290 </span>] -<span id="L4291" class="LineNr">4291 </span> -<span id="L4292" class="LineNr">4292 </span><span class="muScenario">scenario</span> editor-comments-empty-line [ -<span id="L4293" class="LineNr">4293 </span> <span class="Constant">local-scope</span> -<span id="L4294" class="LineNr">4294 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L4295" class="LineNr">4295 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L4296" class="LineNr">4296 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4297" class="LineNr">4297 </span> $clear-trace -<span id="L4298" class="LineNr">4298 </span> assume-console [ -<span id="L4299" class="LineNr">4299 </span> press ctrl-slash -<span id="L4300" class="LineNr">4300 </span> ] -<span id="L4301" class="LineNr">4301 </span> run [ -<span id="L4302" class="LineNr">4302 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4303" class="LineNr">4303 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L4304" class="LineNr">4304 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L4305" class="LineNr">4305 </span> ] -<span id="L4306" class="LineNr">4306 </span> screen-should-contain [ -<span id="L4307" class="LineNr">4307 </span> <span class="Constant"> . .</span> -<span id="L4308" class="LineNr">4308 </span> <span class="Constant"> .#? .</span> -<span id="L4309" class="LineNr">4309 </span> <span class="Constant"> .╌╌╌╌╌ .</span> -<span id="L4310" class="LineNr">4310 </span> <span class="Constant"> . .</span> -<span id="L4311" class="LineNr">4311 </span> ] -<span id="L4312" class="LineNr">4312 </span> memory-should-contain [ -<span id="L4313" class="LineNr">4313 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> -<span id="L4314" class="LineNr">4314 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<span id="L4315" class="LineNr">4315 </span> ] -<span id="L4316" class="LineNr">4316 </span> check-trace-count-for-label<span class="Constant"> 5</span>, <span class="Constant">[print-character]</span> -<span id="L4317" class="LineNr">4317 </span>] -<span id="L4318" class="LineNr">4318 </span> -<span id="L4319" class="LineNr">4319 </span><span class="muScenario">scenario</span> editor-comments-at-start-of-contents [ -<span id="L4320" class="LineNr">4320 </span> <span class="Constant">local-scope</span> -<span id="L4321" class="LineNr">4321 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L4322" class="LineNr">4322 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L4323" class="LineNr">4323 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4324" class="LineNr">4324 </span> $clear-trace -<span id="L4325" class="LineNr">4325 </span> assume-console [ -<span id="L4326" class="LineNr">4326 </span> press ctrl-slash -<span id="L4327" class="LineNr">4327 </span> ] -<span id="L4328" class="LineNr">4328 </span> run [ -<span id="L4329" class="LineNr">4329 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4330" class="LineNr">4330 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L4331" class="LineNr">4331 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L4332" class="LineNr">4332 </span> ] -<span id="L4333" class="LineNr">4333 </span> screen-should-contain [ -<span id="L4334" class="LineNr">4334 </span> <span class="Constant"> . .</span> -<span id="L4335" class="LineNr">4335 </span> <span class="Constant"> .#? ab .</span> -<span id="L4336" class="LineNr">4336 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L4337" class="LineNr">4337 </span> <span class="Constant"> . .</span> -<span id="L4338" class="LineNr">4338 </span> ] -<span id="L4339" class="LineNr">4339 </span> memory-should-contain [ -<span id="L4340" class="LineNr">4340 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> -<span id="L4341" class="LineNr">4341 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> -<span id="L4342" class="LineNr">4342 </span> ] -<span id="L4343" class="LineNr">4343 </span> check-trace-count-for-label<span class="Constant"> 10</span>, <span class="Constant">[print-character]</span> -<span id="L4344" class="LineNr">4344 </span>] -<span id="L4345" class="LineNr">4345 </span> -<span id="L4346" class="LineNr">4346 </span><span class="muScenario">scenario</span> editor-comments-at-end-of-contents [ -<span id="L4347" class="LineNr">4347 </span> <span class="Constant">local-scope</span> -<span id="L4348" class="LineNr">4348 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L4349" class="LineNr">4349 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> -<span id="L4350" class="LineNr">4350 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4351" class="LineNr">4351 </span> $clear-trace -<span id="L4352" class="LineNr">4352 </span> assume-console [ -<span id="L4353" class="LineNr">4353 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span> -<span id="L4354" class="LineNr">4354 </span> press ctrl-slash +<span id="L4289" class="LineNr">4289 </span> <a href='../081print.mu.html#L553'>clear-line-until</a> <a href='../081print.mu.html#L16'>screen</a>, right +<span id="L4290" class="LineNr">4290 </span> <span class="muControl"> return</span><span class="Constant"> false/dont-render</span> +<span id="L4291" class="LineNr">4291 </span>] +<span id="L4292" class="LineNr">4292 </span> +<span id="L4293" class="LineNr">4293 </span><span class="muRecipe">def</span> <a href='003-shortcuts.mu.html#L4293'>before-start-of-screen-line</a> editor:&:editor<span class="muRecipe"> -> </span>result:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char [ +<span id="L4294" class="LineNr">4294 </span> <span class="Constant">local-scope</span> +<span id="L4295" class="LineNr">4295 </span> <span class="Constant">load-inputs</span> +<span id="L4296" class="LineNr">4296 </span> cursor:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> get *editor, <span class="Constant">before-cursor:offset</span> +<span id="L4297" class="LineNr">4297 </span> <span class="Delimiter">{</span> +<span id="L4298" class="LineNr">4298 </span> <a href='../065duplex_list.mu.html#L31'>next</a>:&:<a href='../065duplex_list.mu.html#L3'>duplex-list</a>:char <span class="Special"><-</span> <a href='../065duplex_list.mu.html#L31'>next</a> cursor +<span id="L4299" class="LineNr">4299 </span> <span class="muControl">break-unless</span> <a href='../065duplex_list.mu.html#L31'>next</a> +<span id="L4300" class="LineNr">4300 </span> cursor <span class="Special"><-</span> copy <a href='../065duplex_list.mu.html#L31'>next</a> +<span id="L4301" class="LineNr">4301 </span> <span class="Delimiter">}</span> +<span id="L4302" class="LineNr">4302 </span> result <span class="Special"><-</span> <a href='003-shortcuts.mu.html#L1067'>before-previous-screen-line</a> cursor, editor +<span id="L4303" class="LineNr">4303 </span>] +<span id="L4304" class="LineNr">4304 </span> +<span id="L4305" class="LineNr">4305 </span><span class="muScenario">scenario</span> editor-comments-empty-line [ +<span id="L4306" class="LineNr">4306 </span> <span class="Constant">local-scope</span> +<span id="L4307" class="LineNr">4307 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L4308" class="LineNr">4308 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L4309" class="LineNr">4309 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4310" class="LineNr">4310 </span> $clear-trace +<span id="L4311" class="LineNr">4311 </span> assume-console [ +<span id="L4312" class="LineNr">4312 </span> press ctrl-slash +<span id="L4313" class="LineNr">4313 </span> ] +<span id="L4314" class="LineNr">4314 </span> run [ +<span id="L4315" class="LineNr">4315 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4316" class="LineNr">4316 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L4317" class="LineNr">4317 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L4318" class="LineNr">4318 </span> ] +<span id="L4319" class="LineNr">4319 </span> screen-should-contain [ +<span id="L4320" class="LineNr">4320 </span> <span class="Constant"> . .</span> +<span id="L4321" class="LineNr">4321 </span> <span class="Constant"> .#? .</span> +<span id="L4322" class="LineNr">4322 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<span id="L4323" class="LineNr">4323 </span> <span class="Constant"> . .</span> +<span id="L4324" class="LineNr">4324 </span> ] +<span id="L4325" class="LineNr">4325 </span> memory-should-contain [ +<span id="L4326" class="LineNr">4326 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<span id="L4327" class="LineNr">4327 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> +<span id="L4328" class="LineNr">4328 </span> ] +<span id="L4329" class="LineNr">4329 </span> check-trace-count-for-label<span class="Constant"> 5</span>, <span class="Constant">[print-character]</span> +<span id="L4330" class="LineNr">4330 </span>] +<span id="L4331" class="LineNr">4331 </span> +<span id="L4332" class="LineNr">4332 </span><span class="muScenario">scenario</span> editor-comments-at-start-of-contents [ +<span id="L4333" class="LineNr">4333 </span> <span class="Constant">local-scope</span> +<span id="L4334" class="LineNr">4334 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L4335" class="LineNr">4335 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L4336" class="LineNr">4336 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4337" class="LineNr">4337 </span> $clear-trace +<span id="L4338" class="LineNr">4338 </span> assume-console [ +<span id="L4339" class="LineNr">4339 </span> press ctrl-slash +<span id="L4340" class="LineNr">4340 </span> ] +<span id="L4341" class="LineNr">4341 </span> run [ +<span id="L4342" class="LineNr">4342 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4343" class="LineNr">4343 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L4344" class="LineNr">4344 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L4345" class="LineNr">4345 </span> ] +<span id="L4346" class="LineNr">4346 </span> screen-should-contain [ +<span id="L4347" class="LineNr">4347 </span> <span class="Constant"> . .</span> +<span id="L4348" class="LineNr">4348 </span> <span class="Constant"> .#? ab .</span> +<span id="L4349" class="LineNr">4349 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L4350" class="LineNr">4350 </span> <span class="Constant"> . .</span> +<span id="L4351" class="LineNr">4351 </span> ] +<span id="L4352" class="LineNr">4352 </span> memory-should-contain [ +<span id="L4353" class="LineNr">4353 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<span id="L4354" class="LineNr">4354 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 3</span> <span id="L4355" class="LineNr">4355 </span> ] -<span id="L4356" class="LineNr">4356 </span> run [ -<span id="L4357" class="LineNr">4357 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4358" class="LineNr">4358 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L4359" class="LineNr">4359 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L4360" class="LineNr">4360 </span> ] -<span id="L4361" class="LineNr">4361 </span> screen-should-contain [ -<span id="L4362" class="LineNr">4362 </span> <span class="Constant"> . .</span> -<span id="L4363" class="LineNr">4363 </span> <span class="Constant"> .#? ab .</span> -<span id="L4364" class="LineNr">4364 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L4365" class="LineNr">4365 </span> <span class="Constant"> . .</span> -<span id="L4366" class="LineNr">4366 </span> ] -<span id="L4367" class="LineNr">4367 </span> memory-should-contain [ -<span id="L4368" class="LineNr">4368 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> -<span id="L4369" class="LineNr">4369 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 5</span> -<span id="L4370" class="LineNr">4370 </span> ] -<span id="L4371" class="LineNr">4371 </span> check-trace-count-for-label<span class="Constant"> 10</span>, <span class="Constant">[print-character]</span> -<span id="L4372" class="LineNr">4372 </span> <span class="Comment"># toggle to uncomment</span> -<span id="L4373" class="LineNr">4373 </span> $clear-trace -<span id="L4374" class="LineNr">4374 </span> assume-console [ -<span id="L4375" class="LineNr">4375 </span> press ctrl-slash -<span id="L4376" class="LineNr">4376 </span> ] -<span id="L4377" class="LineNr">4377 </span> run [ -<span id="L4378" class="LineNr">4378 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4379" class="LineNr">4379 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> -<span id="L4380" class="LineNr">4380 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> -<span id="L4381" class="LineNr">4381 </span> ] -<span id="L4382" class="LineNr">4382 </span> screen-should-contain [ -<span id="L4383" class="LineNr">4383 </span> <span class="Constant"> . .</span> -<span id="L4384" class="LineNr">4384 </span> <span class="Constant"> .ab .</span> -<span id="L4385" class="LineNr">4385 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> -<span id="L4386" class="LineNr">4386 </span> <span class="Constant"> . .</span> -<span id="L4387" class="LineNr">4387 </span> ] -<span id="L4388" class="LineNr">4388 </span> check-trace-count-for-label<span class="Constant"> 10</span>, <span class="Constant">[print-character]</span> -<span id="L4389" class="LineNr">4389 </span>] -<span id="L4390" class="LineNr">4390 </span> -<span id="L4391" class="LineNr">4391 </span><span class="muScenario">scenario</span> editor-comments-almost-wrapping-line [ -<span id="L4392" class="LineNr">4392 </span> <span class="Constant">local-scope</span> -<span id="L4393" class="LineNr">4393 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L4394" class="LineNr">4394 </span> <span class="Comment"># editor starts out with a non-wrapping line</span> -<span id="L4395" class="LineNr">4395 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abcd]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L4396" class="LineNr">4396 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4397" class="LineNr">4397 </span> screen-should-contain [ -<span id="L4398" class="LineNr">4398 </span> <span class="Constant"> . .</span> -<span id="L4399" class="LineNr">4399 </span> <span class="Constant"> .abcd .</span> -<span id="L4400" class="LineNr">4400 </span> <span class="Constant"> .╌╌╌╌╌ .</span> -<span id="L4401" class="LineNr">4401 </span> <span class="Constant"> . .</span> -<span id="L4402" class="LineNr">4402 </span> ] -<span id="L4403" class="LineNr">4403 </span> $clear-trace -<span id="L4404" class="LineNr">4404 </span> <span class="Comment"># on commenting the line is now wrapped</span> -<span id="L4405" class="LineNr">4405 </span> assume-console [ -<span id="L4406" class="LineNr">4406 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span> -<span id="L4407" class="LineNr">4407 </span> press ctrl-slash -<span id="L4408" class="LineNr">4408 </span> ] -<span id="L4409" class="LineNr">4409 </span> run [ -<span id="L4410" class="LineNr">4410 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4411" class="LineNr">4411 </span> ] -<span id="L4412" class="LineNr">4412 </span> screen-should-contain [ -<span id="L4413" class="LineNr">4413 </span> <span class="Constant"> . .</span> -<span id="L4414" class="LineNr">4414 </span> <span class="Constant"> .#? a↩ .</span> -<span id="L4415" class="LineNr">4415 </span> <span class="Constant"> .bcd .</span> -<span id="L4416" class="LineNr">4416 </span> <span class="Constant"> .╌╌╌╌╌ .</span> -<span id="L4417" class="LineNr">4417 </span> <span class="Constant"> . .</span> -<span id="L4418" class="LineNr">4418 </span> ] -<span id="L4419" class="LineNr">4419 </span>] -<span id="L4420" class="LineNr">4420 </span> -<span id="L4421" class="LineNr">4421 </span><span class="muScenario">scenario</span> editor-uncomments-just-wrapping-line [ -<span id="L4422" class="LineNr">4422 </span> <span class="Constant">local-scope</span> -<span id="L4423" class="LineNr">4423 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> -<span id="L4424" class="LineNr">4424 </span> <span class="Comment"># editor starts out with a comment that wraps the line</span> -<span id="L4425" class="LineNr">4425 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[#? ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> -<span id="L4426" class="LineNr">4426 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e -<span id="L4427" class="LineNr">4427 </span> screen-should-contain [ -<span id="L4428" class="LineNr">4428 </span> <span class="Constant"> . .</span> -<span id="L4429" class="LineNr">4429 </span> <span class="Constant"> .#? a↩ .</span> -<span id="L4430" class="LineNr">4430 </span> <span class="Constant"> .b .</span> -<span id="L4431" class="LineNr">4431 </span> <span class="Constant"> .╌╌╌╌╌ .</span> -<span id="L4432" class="LineNr">4432 </span> <span class="Constant"> . .</span> -<span id="L4433" class="LineNr">4433 </span> ] -<span id="L4434" class="LineNr">4434 </span> $clear-trace -<span id="L4435" class="LineNr">4435 </span> <span class="Comment"># on uncommenting the line is no longer wrapped</span> -<span id="L4436" class="LineNr">4436 </span> assume-console [ -<span id="L4437" class="LineNr">4437 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span> -<span id="L4438" class="LineNr">4438 </span> press ctrl-slash -<span id="L4439" class="LineNr">4439 </span> ] -<span id="L4440" class="LineNr">4440 </span> run [ -<span id="L4441" class="LineNr">4441 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e -<span id="L4442" class="LineNr">4442 </span> ] -<span id="L4443" class="LineNr">4443 </span> screen-should-contain [ -<span id="L4444" class="LineNr">4444 </span> <span class="Constant"> . .</span> -<span id="L4445" class="LineNr">4445 </span> <span class="Constant"> .ab .</span> -<span id="L4446" class="LineNr">4446 </span> <span class="Constant"> .╌╌╌╌╌ .</span> -<span id="L4447" class="LineNr">4447 </span> <span class="Constant"> . .</span> -<span id="L4448" class="LineNr">4448 </span> ] -<span id="L4449" class="LineNr">4449 </span>] +<span id="L4356" class="LineNr">4356 </span> check-trace-count-for-label<span class="Constant"> 10</span>, <span class="Constant">[print-character]</span> +<span id="L4357" class="LineNr">4357 </span>] +<span id="L4358" class="LineNr">4358 </span> +<span id="L4359" class="LineNr">4359 </span><span class="muScenario">scenario</span> editor-comments-at-end-of-contents [ +<span id="L4360" class="LineNr">4360 </span> <span class="Constant">local-scope</span> +<span id="L4361" class="LineNr">4361 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L4362" class="LineNr">4362 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">10/right</span> +<span id="L4363" class="LineNr">4363 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4364" class="LineNr">4364 </span> $clear-trace +<span id="L4365" class="LineNr">4365 </span> assume-console [ +<span id="L4366" class="LineNr">4366 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span> +<span id="L4367" class="LineNr">4367 </span> press ctrl-slash +<span id="L4368" class="LineNr">4368 </span> ] +<span id="L4369" class="LineNr">4369 </span> run [ +<span id="L4370" class="LineNr">4370 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4371" class="LineNr">4371 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L4372" class="LineNr">4372 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L4373" class="LineNr">4373 </span> ] +<span id="L4374" class="LineNr">4374 </span> screen-should-contain [ +<span id="L4375" class="LineNr">4375 </span> <span class="Constant"> . .</span> +<span id="L4376" class="LineNr">4376 </span> <span class="Constant"> .#? ab .</span> +<span id="L4377" class="LineNr">4377 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L4378" class="LineNr">4378 </span> <span class="Constant"> . .</span> +<span id="L4379" class="LineNr">4379 </span> ] +<span id="L4380" class="LineNr">4380 </span> memory-should-contain [ +<span id="L4381" class="LineNr">4381 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 1</span> +<span id="L4382" class="LineNr">4382 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 5</span> +<span id="L4383" class="LineNr">4383 </span> ] +<span id="L4384" class="LineNr">4384 </span> check-trace-count-for-label<span class="Constant"> 10</span>, <span class="Constant">[print-character]</span> +<span id="L4385" class="LineNr">4385 </span> <span class="Comment"># toggle to uncomment</span> +<span id="L4386" class="LineNr">4386 </span> $clear-trace +<span id="L4387" class="LineNr">4387 </span> assume-console [ +<span id="L4388" class="LineNr">4388 </span> press ctrl-slash +<span id="L4389" class="LineNr">4389 </span> ] +<span id="L4390" class="LineNr">4390 </span> run [ +<span id="L4391" class="LineNr">4391 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4392" class="LineNr">4392 </span> 4:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-row:offset</span> +<span id="L4393" class="LineNr">4393 </span> 5:num/<span class="Special">raw</span> <span class="Special"><-</span> get *e, <span class="Constant">cursor-column:offset</span> +<span id="L4394" class="LineNr">4394 </span> ] +<span id="L4395" class="LineNr">4395 </span> screen-should-contain [ +<span id="L4396" class="LineNr">4396 </span> <span class="Constant"> . .</span> +<span id="L4397" class="LineNr">4397 </span> <span class="Constant"> .ab .</span> +<span id="L4398" class="LineNr">4398 </span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌.</span> +<span id="L4399" class="LineNr">4399 </span> <span class="Constant"> . .</span> +<span id="L4400" class="LineNr">4400 </span> ] +<span id="L4401" class="LineNr">4401 </span> check-trace-count-for-label<span class="Constant"> 10</span>, <span class="Constant">[print-character]</span> +<span id="L4402" class="LineNr">4402 </span>] +<span id="L4403" class="LineNr">4403 </span> +<span id="L4404" class="LineNr">4404 </span><span class="muScenario">scenario</span> editor-comments-almost-wrapping-line [ +<span id="L4405" class="LineNr">4405 </span> <span class="Constant">local-scope</span> +<span id="L4406" class="LineNr">4406 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L4407" class="LineNr">4407 </span> <span class="Comment"># editor starts out with a non-wrapping line</span> +<span id="L4408" class="LineNr">4408 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[abcd]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L4409" class="LineNr">4409 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4410" class="LineNr">4410 </span> screen-should-contain [ +<span id="L4411" class="LineNr">4411 </span> <span class="Constant"> . .</span> +<span id="L4412" class="LineNr">4412 </span> <span class="Constant"> .abcd .</span> +<span id="L4413" class="LineNr">4413 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<span id="L4414" class="LineNr">4414 </span> <span class="Constant"> . .</span> +<span id="L4415" class="LineNr">4415 </span> ] +<span id="L4416" class="LineNr">4416 </span> $clear-trace +<span id="L4417" class="LineNr">4417 </span> <span class="Comment"># on commenting the line is now wrapped</span> +<span id="L4418" class="LineNr">4418 </span> assume-console [ +<span id="L4419" class="LineNr">4419 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span> +<span id="L4420" class="LineNr">4420 </span> press ctrl-slash +<span id="L4421" class="LineNr">4421 </span> ] +<span id="L4422" class="LineNr">4422 </span> run [ +<span id="L4423" class="LineNr">4423 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4424" class="LineNr">4424 </span> ] +<span id="L4425" class="LineNr">4425 </span> screen-should-contain [ +<span id="L4426" class="LineNr">4426 </span> <span class="Constant"> . .</span> +<span id="L4427" class="LineNr">4427 </span> <span class="Constant"> .#? a↩ .</span> +<span id="L4428" class="LineNr">4428 </span> <span class="Constant"> .bcd .</span> +<span id="L4429" class="LineNr">4429 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<span id="L4430" class="LineNr">4430 </span> <span class="Constant"> . .</span> +<span id="L4431" class="LineNr">4431 </span> ] +<span id="L4432" class="LineNr">4432 </span>] +<span id="L4433" class="LineNr">4433 </span> +<span id="L4434" class="LineNr">4434 </span><span class="muScenario">scenario</span> editor-uncomments-just-wrapping-line [ +<span id="L4435" class="LineNr">4435 </span> <span class="Constant">local-scope</span> +<span id="L4436" class="LineNr">4436 </span> assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span> +<span id="L4437" class="LineNr">4437 </span> <span class="Comment"># editor starts out with a comment that wraps the line</span> +<span id="L4438" class="LineNr">4438 </span> e:&:editor <span class="Special"><-</span> <a href='001-editor.mu.html#L51'>new-editor</a> <span class="Constant">[#? ab]</span>, <span class="Constant">0/left</span>, <span class="Constant">5/right</span> +<span id="L4439" class="LineNr">4439 </span> <a href='002-typing.mu.html#L265'>editor-render</a> <a href='../081print.mu.html#L16'>screen</a>, e +<span id="L4440" class="LineNr">4440 </span> screen-should-contain [ +<span id="L4441" class="LineNr">4441 </span> <span class="Constant"> . .</span> +<span id="L4442" class="LineNr">4442 </span> <span class="Constant"> .#? a↩ .</span> +<span id="L4443" class="LineNr">4443 </span> <span class="Constant"> .b .</span> +<span id="L4444" class="LineNr">4444 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<span id="L4445" class="LineNr">4445 </span> <span class="Constant"> . .</span> +<span id="L4446" class="LineNr">4446 </span> ] +<span id="L4447" class="LineNr">4447 </span> $clear-trace +<span id="L4448" class="LineNr">4448 </span> <span class="Comment"># on uncommenting the line is no longer wrapped</span> +<span id="L4449" class="LineNr">4449 </span> assume-console [ +<span id="L4450" class="LineNr">4450 </span> left-click<span class="Constant"> 1</span>,<span class="Constant"> 7</span> +<span id="L4451" class="LineNr">4451 </span> press ctrl-slash +<span id="L4452" class="LineNr">4452 </span> ] +<span id="L4453" class="LineNr">4453 </span> run [ +<span id="L4454" class="LineNr">4454 </span> <a href='002-typing.mu.html#L16'>editor-event-loop</a> <a href='../081print.mu.html#L16'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, e +<span id="L4455" class="LineNr">4455 </span> ] +<span id="L4456" class="LineNr">4456 </span> screen-should-contain [ +<span id="L4457" class="LineNr">4457 </span> <span class="Constant"> . .</span> +<span id="L4458" class="LineNr">4458 </span> <span class="Constant"> .ab .</span> +<span id="L4459" class="LineNr">4459 </span> <span class="Constant"> .╌╌╌╌╌ .</span> +<span id="L4460" class="LineNr">4460 </span> <span class="Constant"> . .</span> +<span id="L4461" class="LineNr">4461 </span> ] +<span id="L4462" class="LineNr">4462 </span>] </pre> </body> </html> |