## clicking on the code typed into a sandbox toggles its trace

scenario sandbox-click-on-code-toggles-app-trace [
  trace-until 100/app  # trace too long
  assume-screen 40/width, 10/height
  # basic recipe
  1:address:array:character <- new [ 
recipe foo [
  stash [abc]
]]
  # run it
  2:address:array:character <- new [foo]
  assume-console [
    press F4
  ]
  3:address:programming-environment-data <- new-programming-environment screen:address:screen, 1:address:array:character, 2:address:array:character
  event-loop screen:address:screen, console:address:console, 3:address:programming-environment-data
  screen-should-contain [
    .                     run (F4)           .
    .                    ┊                   .
    .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.
    .  stash [abc]       ┊0                 x.
    .]                   ┊foo                .
    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                   .
  ]
  # click on the code in the sandbox
  assume-console [
    left-click 4, 21
  ]
  run [
    event-loop screen:address:screen, console:address:console, 3:address:programming-environment-data
    4:character/cursor-icon <- copy 9251/␣
    print screen:address:screen, 4:character/cursor-icon
  ]
  # trace now printed and cursor shouldn't have budged
  screen-should-contain [
    .                     run (F4)           .
    .␣                   ┊                   .
    .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.
    .  stash [abc]       ┊0                 x.
    .]                   ┊foo                .
    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊abc                .
    .                    ┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                   .
  ]
  screen-should-contain-in-color 245/grey, [
    .                                        .
    .                    ┊                   .
    .                    ┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                  x.
    .                    ┊                   .
    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊abc                .
    .                    ┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                   .
  ]
  # click again on the same region
  assume-console [
    left-click 4, 25
  ]
  run [
    event-loop screen:address:screen, console:address:console, 3:address:programming-environment-data
    print screen:address:screen, 4:character/cursor-icon
  ]
  # trace hidden again
  screen-should-contain [
    .                     run (F4)           .
    .␣                   ┊                   .
    .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.
    .  stash [abc]       ┊0                 x.
    .]                   ┊foo                .
    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                   .
  ]
]

scenario sandbox-shows-app-trace-and-result [
  trace-until 100/app  # trace too long
  assume-screen 40/width, 10/height
  # basic recipe
  1:address:array:character <- new [ 
recipe foo [
  stash [abc]
  reply 4
]]
  # run it
  2:address:array:character <- new [foo]
  assume-console [
    press F4
  ]
  3:address:programming-environment-data <- new-programming-environment screen:address:screen, 1:address:array:character, 2:address:array:character
  event-loop screen:address:screen, console:address:console, 3:address:programming-environment-data
  screen-should-contain [
    .                     run (F4)           .
    .                    ┊                   .
    .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.
    .  stash [abc]       ┊0                 x.
    .  reply 4           ┊foo                .
    .]                   ┊4                  .
    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                   .
  ]
  # click on the code in the sandbox
  assume-console [
    left-click 4, 21
  ]
  run [
    event-loop screen:address:screen, console:address:console, 3:address:programming-environment-data
  ]
  # trace now printed above result
  screen-should-contain [
    .                     run (F4)           .
    .                    ┊                   .
    .recipe foo [        ┊━━━━━━━━━━━━━━━━━━━.
    .  stash [abc]       ┊0                 x.
    .  reply 4           ┊foo                .
    .]                   ┊abc                .
    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊4                  .
    .                    ┊━━━━━━━━━━━━━━━━━━━.
    .                    ┊                   .
  ]
]

container sandbox-data [
  trace:address:array:character
  display-trace?:boolean
]

# replaced in a later layer
def! update-sandbox sandbox:address:sandbox-data, env:address:programming-environment-data, idx:number -> sandbox:address:sandbox-data, env:address:programming-environment-data [
  local-scope
  load-ingredients
  data:address:array:character <- get *sandbox, data:offset
  response:address:array:character, _, fake-screen:address:screen, trace:address:array:character <- run-interactive data
  *sandbox <- put *sandbox, response:offset, response
  *sandbox <- put *sandbox, screen:offset, fake-screen
  *sandbox <- put *sandbox, trace:offset, trace
]

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

def find-click-in-sandbox-code env:address:programming-environment-data, click-row:number -> sandbox:address:sandbox-data [
  local-scope
  load-ingredients
  # assert click-row >= sandbox.starting-row-on-screen
  sandbox <- get *env, sandbox:offset
  start:number <- get *sandbox, starting-row-on-screen:offset
  clicked-on-sandboxes?:boolean <- greater-or-equal click-row, start
  assert clicked-on-sandboxes?, [extract-sandbox called on click to sandbox editor]
  # while click-row < sandbox.next-sandbox.starting-row-on-screen
  {
    next-sandbox:address:sandbox-data <- get *sandbox, next-sandbox:offset
    break-unless next-sandbox
    next-start:number <- get *next-sandbox, starting-row-on-screen:offset
    found?:boolean <- lesser-than click-row, next-start
    break-if found?
    sandbox <- copy next-sandbox
    loop
  }
  # return sandbox if click is in its code region
  code-ending-row:number <- get *sandbox, code-ending-row-on-screen:offset
  click-above-response?:boolean <- lesser-than click-row, code-ending-row
  start:number <- get *sandbox, starting-row-on-screen:offset
  click-below-menu?:boolean <- greater-than click-row, start
  click-on-sandbox-code?:boolean <- and click-above-response?, click-below-menu?
  {
    break-if click-on-sandbox-code?
    return 0/no-click-in-sandbox-output
  }
  return sandbox
]

# when rendering a sandbox, dump its trace before response/warning if display-trace? property is set
after <render-sandbox-results> [
  {
    display-trace?:boolean <- get *sandbox, display-trace?:offset
    break-unless display-trace?
    sandbox-trace:address:array:character <- get *sandbox, trace:offset
    break-unless sandbox-trace  # nothing to print; move on
    row, screen <- render screen, sandbox-trace, left, right, 245/grey, row
  }
  <render-sandbox-trace-done>
]