3738 - start on new edit/ layer: minimizing prints

1 files changed, 279 insertions, 0 deletions

diff --git a/edit/007-sandbox-copy.mu b/edit/007-sandbox-copy.mu
new file mode 100644
index 00000000..9df5e625
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+++ b/edit/007-sandbox-copy.mu
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+## the 'copy' button makes it easy to duplicate a sandbox, and thence to
+## see code operate in multiple situations
+
+scenario copy-a-sandbox-to-editor [
+  local-scope
+  trace-until 100/app  # trace too long
+  assume-screen 100/width, 10/height
+  # empty recipes
+  assume-resources [
+  ]
+  env:&:environment <- new-programming-environment resources, screen, [add 1, 1]  # contents of sandbox editor
+  # run it
+  assume-console [
+    press F4
+  ]
+  event-loop screen, console, env, resources
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊                                                 .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+  # click at left edge of 'copy' button
+  assume-console [
+    left-click 3, 69
+  ]
+  run [
+    event-loop screen, console, env, resources
+  ]
+  # it copies into editor
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊add 1, 1                                         .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+  # cursor should be in the right place
+  assume-console [
+    type [0]
+  ]
+  run [
+    event-loop screen, console, env, resources
+  ]
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊0add 1, 1                                        .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+]
+
+scenario copy-a-sandbox-to-editor-2 [
+  local-scope
+  trace-until 100/app  # trace too long
+  assume-screen 100/width, 10/height
+  # empty recipes
+  assume-resources [
+  ]
+  env:&:environment <- new-programming-environment resources, screen, [add 1, 1]  # contents of sandbox editor
+  # run it
+  assume-console [
+    press F4
+  ]
+  event-loop screen, console, env, resources
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊                                                 .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+  # click at right edge of 'copy' button (just before 'delete')
+  assume-console [
+    left-click 3, 84
+  ]
+  run [
+    event-loop screen, console, env, resources
+  ]
+  # it copies into editor
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊add 1, 1                                         .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+  # cursor should be in the right place
+  assume-console [
+    type [0]
+  ]
+  run [
+    event-loop screen, console, env, resources
+  ]
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊0add 1, 1                                        .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+]
+
+after <global-touch> [
+  # support 'copy' button
+  {
+    copy?:bool <- should-attempt-copy? click-row, click-column, env
+    break-unless copy?
+    copy?, env <- try-copy-sandbox click-row, env
+    break-unless copy?
+    hide-screen screen
+    screen <- render-sandbox-side screen, env, render
+    screen <- update-cursor screen, recipes, current-sandbox, sandbox-in-focus?, env
+    show-screen screen
+    loop +next-event
+  }
+]
+
+# some preconditions for attempting to copy a sandbox
+def should-attempt-copy? click-row:num, click-column:num, env:&:environment -> result:bool [
+  local-scope
+  load-ingredients
+  # are we below the sandbox editor?
+  click-sandbox-area?:bool <- click-on-sandbox-area? click-row, click-column, env
+  return-unless click-sandbox-area?, 0/false
+  # narrower, is the click in the columns spanning the 'copy' button?
+  first-sandbox:&:editor <- get *env, current-sandbox:offset
+  assert first-sandbox, [!!]
+  sandbox-left-margin:num <- get *first-sandbox, left:offset
+  sandbox-right-margin:num <- get *first-sandbox, right:offset
+  _, _, copy-button-left:num, copy-button-right:num, _ <- sandbox-menu-columns sandbox-left-margin, sandbox-right-margin
+  copy-button-vertical-area?:bool <- within-range? click-column, copy-button-left, copy-button-right
+  return-unless copy-button-vertical-area?, 0/false
+  # finally, is sandbox editor empty?
+  current-sandbox:&:editor <- get *env, current-sandbox:offset
+  result <- empty-editor? current-sandbox
+]
+
+def try-copy-sandbox click-row:num, env:&:environment -> clicked-on-copy-button?:bool, env:&:environment [
+  local-scope
+  load-ingredients
+  # identify the sandbox to copy, if the click was actually on the 'copy' button
+  sandbox:&:sandbox <- find-sandbox env, click-row
+  return-unless sandbox, 0/false
+  clicked-on-copy-button? <- copy 1/true
+  text:text <- get *sandbox, data:offset
+  current-sandbox:&:editor <- get *env, current-sandbox:offset
+  current-sandbox <- insert-text current-sandbox, text
+  # reset scroll
+  *env <- put *env, render-from:offset, -1
+  # position cursor in sandbox editor
+  *env <- put *env, sandbox-in-focus?:offset, 1/true
+]
+
+def find-sandbox env:&:environment, click-row:num -> result:&:sandbox [
+  local-scope
+  load-ingredients
+  curr-sandbox:&:sandbox <- get *env, sandbox:offset
+  {
+    break-unless curr-sandbox
+    start:num <- get *curr-sandbox, starting-row-on-screen:offset
+    found?:bool <- equal click-row, start
+    return-if found?, curr-sandbox
+    curr-sandbox <- get *curr-sandbox, next-sandbox:offset
+    loop
+  }
+  return 0/not-found
+]
+
+def click-on-sandbox-area? click-row:num, click-column:num, env:&:environment -> result:bool [
+  local-scope
+  load-ingredients
+  current-sandbox:&:editor <- get *env, current-sandbox:offset
+  sandbox-left-margin:num <- get *current-sandbox, left:offset
+  on-sandbox-side?:bool <- greater-or-equal click-column, sandbox-left-margin
+  return-unless on-sandbox-side?, 0/false
+  first-sandbox:&:sandbox <- get *env, sandbox:offset
+  return-unless first-sandbox, 0/false
+  first-sandbox-begins:num <- get *first-sandbox, starting-row-on-screen:offset
+  result <- greater-or-equal click-row, first-sandbox-begins
+]
+
+def empty-editor? editor:&:editor -> result:bool [
+  local-scope
+  load-ingredients
+  head:&:duplex-list:char <- get *editor, data:offset
+  first:&:duplex-list:char <- next head
+  result <- not first
+]
+
+def within-range? x:num, low:num, high:num -> result:bool [
+  local-scope
+  load-ingredients
+  not-too-far-left?:bool <- greater-or-equal x, low
+  not-too-far-right?:bool <- lesser-or-equal x, high
+  result <- and not-too-far-left? not-too-far-right?
+]
+
+scenario copy-fails-if-sandbox-editor-not-empty [
+  local-scope
+  trace-until 100/app  # trace too long
+  assume-screen 100/width, 10/height
+  # empty recipes
+  assume-resources [
+  ]
+  env:&:environment <- new-programming-environment resources, screen, [add 1, 1]  # contents of sandbox editor
+  # run it
+  assume-console [
+    press F4
+  ]
+  event-loop screen, console, env, resources
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊                                                 .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+  # type something into the sandbox editor, then click on the 'copy' button
+  assume-console [
+    left-click 2, 70  # put cursor in sandbox editor
+    type [0]  # type something
+    left-click 3, 70  # click 'copy' button
+  ]
+  run [
+    event-loop screen, console, env, resources
+  ]
+  # copy doesn't happen
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊0                                                .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+  # cursor should be in the right place
+  assume-console [
+    type [1]
+  ]
+  run [
+    event-loop screen, console, env, resources
+  ]
+  screen-should-contain [
+    .                                                                                 run (F4)           .
+    .                                                  ┊01                                               .
+    .┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┊─────────────────────────────────────────────────.
+    .                                                  ┊0   edit          copy            delete         .
+    .                                                  ┊add 1, 1                                         .
+    .                                                  ┊2                                                .
+    .                                                  ┊─────────────────────────────────────────────────.
+    .                                                  ┊                                                 .
+  ]
+]