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<pre id='vimCodeElement'>
<span class="SalientComment">## clicking on the code typed into a sandbox toggles its trace</span>

<span class="muScenario">scenario</span> sandbox-click-on-code-toggles-app-trace [
  $close-trace  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">40/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># basic recipe</span>
  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  stash [abc]</span>
]]
  <span class="Comment"># run it</span>
  <span class="Constant">2</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  <span class="Constant">3</span>:address:programming-environment-data<span class="Special"> &lt;- </span>new-programming-environment screen:address, <span class="Constant">1</span>:address:array:character, <span class="Constant">2</span>:address:array:character
  event-loop screen:address, console:address, <span class="Constant">3</span>:address:programming-environment-data
  screen-should-contain [
   <span class="Constant"> .                     run (F4)           .</span>
   <span class="Constant"> .                    ┊                   .</span>
   <span class="Constant"> .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .  stash [abc]       ┊                  x.</span>
   <span class="Constant"> .]                   ┊foo                .</span>
<span class="Constant">    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                   .</span>
  ]
  <span class="Comment"># click on the 'foo' line in the sandbox</span>
  assume-console [
    left-click <span class="Constant">4</span>, <span class="Constant">21</span>
  ]
  run [
    event-loop screen:address, console:address, <span class="Constant">3</span>:address:programming-environment-data
    print-character screen:address, <span class="Constant">9251/␣/cursor</span>
  ]
  <span class="Comment"># trace now printed and cursor shouldn't have budged</span>
  screen-should-contain [
   <span class="Constant"> .                     run (F4)           .</span>
   <span class="Constant"> .␣                   ┊                   .</span>
   <span class="Constant"> .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .  stash [abc]       ┊                  x.</span>
   <span class="Constant"> .]                   ┊foo                .</span>
   <span class="Constant"> .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊abc                .</span>
   <span class="Constant"> .                    ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                   .</span>
  ]
  screen-should-contain-in-color <span class="Constant">245/grey</span>, [
   <span class="Constant"> .                                        .</span>
   <span class="Constant"> .                    ┊                   .</span>
   <span class="Constant"> .                    ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                  x.</span>
   <span class="Constant"> .                    ┊                   .</span>
   <span class="Constant"> .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊abc                .</span>
   <span class="Constant"> .                    ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                   .</span>
  ]
  <span class="Comment"># click again on the same region</span>
  assume-console [
    left-click <span class="Constant">4</span>, <span class="Constant">25</span>
  ]
  run [
    event-loop screen:address, console:address, <span class="Constant">3</span>:address:programming-environment-data
    print-character screen:address, <span class="Constant">9251/␣/cursor</span>
  ]
  <span class="Comment"># trace hidden again</span>
  screen-should-contain [
   <span class="Constant"> .                     run (F4)           .</span>
   <span class="Constant"> .␣                   ┊                   .</span>
   <span class="Constant"> .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .  stash [abc]       ┊                  x.</span>
   <span class="Constant"> .]                   ┊foo                .</span>
<span class="Constant">    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                   .</span>
  ]
]

<span class="muScenario">scenario</span> sandbox-shows-app-trace-and-result [
  $close-trace  <span class="Comment"># trace too long</span>
  assume-screen <span class="Constant">40/width</span>, <span class="Constant">10/height</span>
  <span class="Comment"># basic recipe</span>
  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ </span>
<span class="Constant">recipe foo [</span>
<span class="Constant">  stash [abc]</span>
  add <span class="Constant">2</span>, <span class="Constant">2</span>
]]
  <span class="Comment"># run it</span>
  <span class="Constant">2</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[foo]</span>
  assume-console [
    press F4
  ]
  <span class="Constant">3</span>:address:programming-environment-data<span class="Special"> &lt;- </span>new-programming-environment screen:address, <span class="Constant">1</span>:address:array:character, <span class="Constant">2</span>:address:array:character
  event-loop screen:address, console:address, <span class="Constant">3</span>:address:programming-environment-data
  screen-should-contain [
   <span class="Constant"> .                     run (F4)           .</span>
   <span class="Constant"> .                    ┊                   .</span>
   <span class="Constant"> .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .  stash [abc]       ┊                  x.</span>
   <span class="Constant"> .  add 2, 2          ┊foo                .</span>
   <span class="Constant"> .]                   ┊4                  .</span>
<span class="Constant">    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                   .</span>
  ]
  <span class="Comment"># click on the 'foo' line in the sandbox</span>
  assume-console [
    left-click <span class="Constant">4</span>, <span class="Constant">21</span>
  ]
  run [
    event-loop screen:address, console:address, <span class="Constant">3</span>:address:programming-environment-data
  ]
  <span class="Comment"># trace now printed</span>
  screen-should-contain [
   <span class="Constant"> .                     run (F4)           .</span>
   <span class="Constant"> .                    ┊                   .</span>
   <span class="Constant"> .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .  stash [abc]       ┊                  x.</span>
   <span class="Constant"> .  add 2, 2          ┊foo                .</span>
   <span class="Constant"> .]                   ┊abc                .</span>
   <span class="Constant"> .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊4                  .</span>
   <span class="Constant"> .                    ┊━━━━━━━━━━━━━━━━━━━.</span>
   <span class="Constant"> .                    ┊                   .</span>
  ]
]

<span class="muData">container</span> sandbox-data [
  trace:address:array:character
  display-trace?:boolean
]

<span class="Comment"># replaced in a later layer</span>
<span class="muRecipe">recipe!</span> update-sandbox [
  <span class="Constant">local-scope</span>
  sandbox:address:sandbox-data<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
  data:address:array:character<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">data:offset</span>
  response:address:address:array:character<span class="Special"> &lt;- </span>get-address *sandbox, <span class="Constant">response:offset</span>
  trace:address:address:array:character<span class="Special"> &lt;- </span>get-address *sandbox, <span class="Constant">trace:offset</span>
  fake-screen:address:address:screen<span class="Special"> &lt;- </span>get-address *sandbox, <span class="Constant">screen:offset</span>
  *response, _, *fake-screen, *trace<span class="Special"> &lt;- </span>run-interactive data
]

<span class="Comment"># clicks on sandbox code toggle its display-trace? flag</span>
<span class="muRecipe">after</span> <span class="Constant">&lt;global-touch&gt;</span> [
  <span class="Comment"># right side of screen? check if it's inside the code of any sandbox</span>
  <span class="Delimiter">{</span>
    sandbox-left-margin:number<span class="Special"> &lt;- </span>get *current-sandbox, <span class="Constant">left:offset</span>
    click-column:number<span class="Special"> &lt;- </span>get *t, <span class="Constant">column:offset</span>
    on-sandbox-side?:boolean<span class="Special"> &lt;- </span>greater-or-equal click-column, sandbox-left-margin
    <span class="muControl">break-unless</span> on-sandbox-side?
    first-sandbox:address:sandbox-data<span class="Special"> &lt;- </span>get *env, <span class="Constant">sandbox:offset</span>
    <span class="muControl">break-unless</span> first-sandbox
    first-sandbox-begins:number<span class="Special"> &lt;- </span>get *first-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
    click-row:number<span class="Special"> &lt;- </span>get *t, <span class="Constant">row:offset</span>
    below-sandbox-editor?:boolean<span class="Special"> &lt;- </span>greater-or-equal click-row, first-sandbox-begins
    <span class="muControl">break-unless</span> below-sandbox-editor?
    <span class="Comment"># identify the sandbox whose code is being clicked on</span>
    sandbox:address:sandbox-data<span class="Special"> &lt;- </span>find-click-in-sandbox-code env, click-row
    <span class="muControl">break-unless</span> sandbox
    <span class="Comment"># toggle its display-trace? property</span>
    x:address:boolean<span class="Special"> &lt;- </span>get-address *sandbox, <span class="Constant">display-trace?:offset</span>
    *x<span class="Special"> &lt;- </span>not *x
    hide-screen screen
    screen<span class="Special"> &lt;- </span>render-sandbox-side screen, env, <span class="Constant">1/clear</span>
    screen<span class="Special"> &lt;- </span>update-cursor screen, recipes, current-sandbox, *sandbox-in-focus?
    <span class="Comment"># no change in cursor</span>
    show-screen screen
    <span class="muControl">loop</span> <span class="Constant">+next-event:label</span>
  <span class="Delimiter">}</span>
]

<span class="muRecipe">recipe</span> find-click-in-sandbox-code [
  <span class="Constant">local-scope</span>
  env:address:programming-environment-data<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
  click-row:number<span class="Special"> &lt;- </span><span class="Constant">next-ingredient</span>
  <span class="Comment"># assert click-row &gt;= sandbox.starting-row-on-screen</span>
  sandbox:address:sandbox-data<span class="Special"> &lt;- </span>get *env, <span class="Constant">sandbox:offset</span>
  start:number<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">starting-row-on-screen:offset</span>
  clicked-on-sandboxes?:boolean<span class="Special"> &lt;- </span>greater-or-equal click-row, start
  assert clicked-on-sandboxes?, <span class="Constant">[extract-sandbox called on click to sandbox editor]</span>
  <span class="Comment"># while click-row &lt; sandbox.next-sandbox.starting-row-on-screen</span>
  <span class="Delimiter">{</span>
    next-sandbox:address:sandbox-data<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">next-sandbox:offset</span>
    <span class="muControl">break-unless</span> next-sandbox
    next-start:number<span class="Special"> &lt;- </span>get *next-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
    found?:boolean<span class="Special"> &lt;- </span>lesser-than click-row, next-start
    <span class="muControl">break-if</span> found?
    sandbox<span class="Special"> &lt;- </span>copy next-sandbox
    <span class="muControl">loop</span>
  <span class="Delimiter">}</span>
  <span class="Comment"># return sandbox if click is in its code region</span>
  code-ending-row:number<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">code-ending-row-on-screen:offset</span>
  click-above-response?:boolean<span class="Special"> &lt;- </span>lesser-than click-row, code-ending-row
  start:number<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">starting-row-on-screen:offset</span>
  click-below-menu?:boolean<span class="Special"> &lt;- </span>greater-than click-row, start
  click-on-sandbox-code?:boolean<span class="Special"> &lt;- </span>and click-above-response?, click-below-menu?
  <span class="Delimiter">{</span>
    <span class="muControl">break-if</span> click-on-sandbox-code?
    <span class="muControl">reply</span> <span class="Constant">0/no-click-in-sandbox-output</span>
  <span class="Delimiter">}</span>
  <span class="muControl">reply</span> sandbox
]

<span class="Comment"># when rendering a sandbox, dump its trace before response/warning if display-trace? property is set</span>
<span class="muRecipe">after</span> <span class="Constant">&lt;render-sandbox-results&gt;</span> [
  <span class="Delimiter">{</span>
    display-trace?:boolean<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">display-trace?:offset</span>
    <span class="muControl">break-unless</span> display-trace?
    sandbox-trace:address:array:character<span class="Special"> &lt;- </span>get *sandbox, <span class="Constant">trace:offset</span>
    <span class="muControl">break-unless</span> sandbox-trace  <span class="Comment"># nothing to print; move on</span>
    row, screen<span class="Special"> &lt;- </span>render-string, screen, sandbox-trace, left, right, <span class="Constant">245/grey</span>, row
  <span class="Delimiter">}</span>
]
</pre>
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