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<pre id='vimCodeElement'>
<span class="SalientComment">## the 'copy' button makes it easy to duplicate a sandbox, and thence to</span>
<span class="SalientComment">## see code operate in multiple situations</span>

<span class="muScenario">scenario</span> copy-a-sandbox-to-editor [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># basic recipe</span>
  recipes:text<span class="Special"> &lt;- </span>new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  reply 4</span>
<span class="Constant">]</span>]
  env:&amp;:environment<span class="Special"> &lt;- </span>new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  <span class="Comment"># run it</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># click at left edge of 'copy' button</span>
  assume-console [
    left-click <span class="Constant">3</span>, <span class="Constant">69</span>
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># it copies into editor</span>
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># cursor should be in the right place</span>
  assume-console [
    type <span class="Constant">[0]</span>
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎0foo                                             .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muScenario">scenario</span> copy-a-sandbox-to-editor-2 [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># basic recipe</span>
  recipes:text<span class="Special"> &lt;- </span>new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  reply 4</span>
<span class="Constant">]</span>]
  env:&amp;:environment<span class="Special"> &lt;- </span>new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  <span class="Comment"># run it</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># click at right edge of 'copy' button (just before 'delete')</span>
  assume-console [
    left-click <span class="Constant">3</span>, <span class="Constant">84</span>
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># it copies into editor</span>
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎foo                                              .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># cursor should be in the right place</span>
  assume-console [
    type <span class="Constant">[0]</span>
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎0foo                                             .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]

<span class="muRecipe">after</span> <span class="Constant">&lt;global-touch&gt;</span> [
  <span class="Comment"># support 'copy' button</span>
  <span class="Delimiter">{</span>
    copy?:bool<span class="Special"> &lt;- </span>should-attempt-copy? click-row, click-column, env
    <span class="muControl">break-unless</span> copy?
    copy?, env<span class="Special"> &lt;- </span>try-copy-sandbox click-row, env
    <span class="muControl">break-unless</span> copy?
    hide-screen screen
    screen<span class="Special"> &lt;- </span>render-sandbox-side screen, env, render
    screen<span class="Special"> &lt;- </span>update-cursor screen, recipes, current-sandbox, sandbox-in-focus?, env
    show-screen screen
    <span class="muControl">loop</span> <span class="Constant">+next-event:label</span>
  <span class="Delimiter">}</span>
]

<span class="Comment"># some preconditions for attempting to copy a sandbox</span>
<span class="muRecipe">def</span> should-attempt-copy? click-row:num, click-column:num, env:&amp;:environment<span class="muRecipe"> -&gt; </span>result:bool [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  <span class="Comment"># are we below the sandbox editor?</span>
  click-sandbox-area?:bool<span class="Special"> &lt;- </span>click-on-sandbox-area? click-row, click-column, env
  <span class="muControl">reply-unless</span> click-sandbox-area?, <span class="Constant">0/false</span>
  <span class="Comment"># narrower, is the click in the columns spanning the 'copy' button?</span>
  first-sandbox:&amp;:editor<span class="Special"> &lt;- </span>get *env, <span class="Constant">current-sandbox:offset</span>
  assert first-sandbox, <span class="Constant">[!!]</span>
  sandbox-left-margin:num<span class="Special"> &lt;- </span>get *first-sandbox, <span class="Constant">left:offset</span>
  sandbox-right-margin:num<span class="Special"> &lt;- </span>get *first-sandbox, <span class="Constant">right:offset</span>
  _, _, copy-button-left:num, copy-button-right:num, _<span class="Special"> &lt;- </span>sandbox-menu-columns sandbox-left-margin, sandbox-right-margin
  copy-button-vertical-area?:bool<span class="Special"> &lt;- </span>within-range? click-column, copy-button-left, copy-button-right
  <span class="muControl">reply-unless</span> copy-button-vertical-area?, <span class="Constant">0/false</span>
  <span class="Comment"># finally, is sandbox editor empty?</span>
  current-sandbox:&amp;:editor<span class="Special"> &lt;- </span>get *env, <span class="Constant">current-sandbox:offset</span>
  result<span class="Special"> &lt;- </span>empty-editor? current-sandbox
]

<span class="muRecipe">def</span> try-copy-sandbox click-row:num, env:&amp;:environment<span class="muRecipe"> -&gt; </span>clicked-on-copy-button?:bool, env:&amp;:environment [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  <span class="Comment"># identify the sandbox to copy, if the click was actually on the 'copy' button</span>
  sandbox:&amp;:sandbox<span class="Special"> &lt;- </span>find-sandbox env, click-row
  <span class="muControl">return-unless</span> sandbox, <span class="Constant">0/false</span>
  clicked-on-copy-button?<span class="Special"> &lt;- </span>copy <span class="Constant">1/true</span>
  text:text<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">data:offset</span>
  current-sandbox:&amp;:editor<span class="Special"> &lt;- </span>get *env, <span class="Constant">current-sandbox:offset</span>
  current-sandbox<span class="Special"> &lt;- </span>insert-text current-sandbox, text
  <span class="Comment"># reset scroll</span>
  *env<span class="Special"> &lt;- </span>put *env, <span class="Constant">render-from:offset</span>, <span class="Constant">-1</span>
  <span class="Comment"># position cursor in sandbox editor</span>
  *env<span class="Special"> &lt;- </span>put *env, <span class="Constant">sandbox-in-focus?:offset</span>, <span class="Constant">1/true</span>
]

<span class="muRecipe">def</span> find-sandbox env:&amp;:environment, click-row:num<span class="muRecipe"> -&gt; </span>result:&amp;:sandbox [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  curr-sandbox:&amp;:sandbox<span class="Special"> &lt;- </span>get *env, <span class="Constant">sandbox:offset</span>
  <span class="Delimiter">{</span>
    <span class="muControl">break-unless</span> curr-sandbox
    start:num<span class="Special"> &lt;- </span>get *curr-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
    found?:bool<span class="Special"> &lt;- </span>equal click-row, start
    <span class="muControl">return-if</span> found?, curr-sandbox
    curr-sandbox<span class="Special"> &lt;- </span>get *curr-sandbox, <span class="Constant">next-sandbox:offset</span>
    <span class="muControl">loop</span>
  <span class="Delimiter">}</span>
  <span class="muControl">return</span> <span class="Constant">0/not-found</span>
]

<span class="muRecipe">def</span> click-on-sandbox-area? click-row:num, click-column:num, env:&amp;:environment<span class="muRecipe"> -&gt; </span>result:bool [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  current-sandbox:&amp;:editor<span class="Special"> &lt;- </span>get *env, <span class="Constant">current-sandbox:offset</span>
  sandbox-left-margin:num<span class="Special"> &lt;- </span>get *current-sandbox, <span class="Constant">left:offset</span>
  on-sandbox-side?:bool<span class="Special"> &lt;- </span>greater-or-equal click-column, sandbox-left-margin
  <span class="muControl">return-unless</span> on-sandbox-side?, <span class="Constant">0/false</span>
  first-sandbox:&amp;:sandbox<span class="Special"> &lt;- </span>get *env, <span class="Constant">sandbox:offset</span>
  <span class="muControl">return-unless</span> first-sandbox, <span class="Constant">0/false</span>
  first-sandbox-begins:num<span class="Special"> &lt;- </span>get *first-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
  result<span class="Special"> &lt;- </span>greater-or-equal click-row, first-sandbox-begins
]

<span class="muRecipe">def</span> empty-editor? editor:&amp;:editor<span class="muRecipe"> -&gt; </span>result:bool [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  head:&amp;:duplex-list:char<span class="Special"> &lt;- </span>get *editor, <span class="Constant">data:offset</span>
  first:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next head
  result<span class="Special"> &lt;- </span>not first
]

<span class="muRecipe">def</span> within-range? x:num, low:num, high:num<span class="muRecipe"> -&gt; </span>result:bool [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  not-too-far-left?:bool<span class="Special"> &lt;- </span>greater-or-equal x, low
  not-too-far-right?:bool<span class="Special"> &lt;- </span>lesser-or-equal x, high
  result<span class="Special"> &lt;- </span>and not-too-far-left? not-too-far-right?
]

<span class="muScenario">scenario</span> copy-fails-if-sandbox-editor-not-empty [
  <span class="Constant">local-scope</span>
  trace-until <span class="Constant">100/app</span>  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># basic recipe</span>
  recipes:text<span class="Special"> &lt;- </span>new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  reply 4</span>
<span class="Constant">]</span>]
  env:&amp;:environment<span class="Special"> &lt;- </span>new-programming-environment screen, recipes, <span class="Constant">[foo]</span>
  <span class="Comment"># run it</span>
  assume-console [
    press F4
  ]
  event-loop screen, console, env
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># type something into the sandbox editor, then click on the 'copy' button</span>
  assume-console [
    left-click <span class="Constant">2</span>, <span class="Constant">70</span>  <span class="Comment"># put cursor in sandbox editor</span>
    type <span class="Constant">[0]</span>  <span class="Comment"># type something</span>
    left-click <span class="Constant">3</span>, <span class="Constant">70</span>  <span class="Comment"># click 'copy' button</span>
  ]
  run [
    event-loop screen, console, env
  ]
  <span class="Comment"># copy doesn't happen</span>
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎0                                                .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
  <span class="Comment"># cursor should be in the right place</span>
  assume-console [
    type <span class="Constant">[1]</span>
  ]
  run [
    event-loop screen, console, env
  ]
  screen-should-contain [
   <span class="Constant"> .                                                                                 run (F4)           .</span>
   <span class="Constant"> .                                                  ╎01                                               .</span>
   <span class="Constant"> .recipe foo [                                      ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
   <span class="Constant"> .]                                                 ╎foo                                              .</span>
   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎4                                                .</span>
   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
   <span class="Constant"> .                                                  ╎                                                 .</span>
  ]
]
</pre>
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