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authorKartik K. Agaram <vc@akkartik.com>2016-04-23 17:02:16 -0700
committerKartik K. Agaram <vc@akkartik.com>2016-04-23 17:15:16 -0700
commit7bf9212fd47e505711cc0873d30456e3d793034d (patch)
treee6c84ac4666269b5e366ceff78dd040ac39343bc /edit
parent991d76f32817f5515fb8db25a7d5ca2912cfe4ac (diff)
downloadmu-7bf9212fd47e505711cc0873d30456e3d793034d.tar.gz
2861 - 'maybe-convert' no longer returns address
Diffstat (limited to 'edit')
-rw-r--r--edit/002-typing.mu26
-rw-r--r--edit/003-shortcuts.mu34
-rw-r--r--edit/004-programming-environment.mu26
-rw-r--r--edit/005-sandbox.mu6
-rw-r--r--edit/006-sandbox-edit.mu4
-rw-r--r--edit/007-sandbox-delete.mu2
-rw-r--r--edit/008-sandbox-test.mu4
-rw-r--r--edit/009-sandbox-trace.mu4
-rw-r--r--edit/011-editor-undo.mu144
9 files changed, 127 insertions, 123 deletions
diff --git a/edit/002-typing.mu b/edit/002-typing.mu
index 1c27ce98..d7624ccf 100644
--- a/edit/002-typing.mu
+++ b/edit/002-typing.mu
@@ -25,15 +25,15 @@ def editor-event-loop screen:address:shared:screen, console:address:shared:conso
     break-if quit?  # only in tests
     trace 10, [app], [next-event]
     # 'touch' event
-    t:address:touch-event <- maybe-convert e, touch:variant
+    t:touch-event, is-touch?:boolean <- maybe-convert e, touch:variant
     {
-      break-unless t
-      move-cursor-in-editor screen, editor, *t
+      break-unless is-touch?
+      move-cursor-in-editor screen, editor, t
       loop +next-event:label
     }
     # keyboard events
     {
-      break-if t
+      break-if is-touch?
       screen, editor, go-render?:boolean <- handle-keyboard-event screen, editor, e
       {
         break-unless go-render?
@@ -177,24 +177,24 @@ def handle-keyboard-event screen:address:shared:screen, editor:address:shared:ed
   save-column:number <- copy cursor-column
   # character
   {
-    c:address:character <- maybe-convert e, text:variant
-    break-unless c
+    c:character, is-unicode?:boolean <- maybe-convert e, text:variant
+    break-unless is-unicode?
     trace 10, [app], [handle-keyboard-event: special character]
     # exceptions for special characters go here
     <handle-special-character>
     # ignore any other special characters
-    regular-character?:boolean <- greater-or-equal *c, 32/space
+    regular-character?:boolean <- greater-or-equal c, 32/space
     go-render? <- copy 0/false
     return-unless regular-character?
     # otherwise type it in
     <insert-character-begin>
-    editor, screen, go-render?:boolean <- insert-at-cursor editor, *c, screen
+    editor, screen, go-render?:boolean <- insert-at-cursor editor, c, screen
     <insert-character-end>
     return
   }
   # special key to modify the text or move the cursor
-  k:address:number <- maybe-convert e:event, keycode:variant
-  assert k, [event was of unknown type; neither keyboard nor mouse]
+  k:number, is-keycode?:boolean <- maybe-convert e:event, keycode:variant
+  assert is-keycode?, [event was of unknown type; neither keyboard nor mouse]
   # handlers for each special key will go here
   <handle-special-key>
   go-render? <- copy 1/true
@@ -821,7 +821,7 @@ scenario editor-moves-cursor-down-after-inserting-newline [
 
 after <handle-special-character> [
   {
-    newline?:boolean <- equal *c, 10/newline
+    newline?:boolean <- equal c, 10/newline
     break-unless newline?
     <insert-enter-begin>
     editor <- insert-new-line-and-indent editor, screen
@@ -1003,7 +1003,7 @@ ef]
 
 after <handle-special-key> [
   {
-    paste-start?:boolean <- equal *k, 65507/paste-start
+    paste-start?:boolean <- equal k, 65507/paste-start
     break-unless paste-start?
     *editor <- put *editor, indent?:offset, 0/false
     go-render? <- copy 1/true
@@ -1013,7 +1013,7 @@ after <handle-special-key> [
 
 after <handle-special-key> [
   {
-    paste-end?:boolean <- equal *k, 65506/paste-end
+    paste-end?:boolean <- equal k, 65506/paste-end
     break-unless paste-end?
     *editor <- put *editor, indent?:offset, 1/true
     go-render? <- copy 1/true
diff --git a/edit/003-shortcuts.mu b/edit/003-shortcuts.mu
index f29773af..8ed01de7 100644
--- a/edit/003-shortcuts.mu
+++ b/edit/003-shortcuts.mu
@@ -25,7 +25,7 @@ cd]
 
 after <handle-special-cha
//: Once all code is loaded, save operation ids of instructions and check that
//: nothing's undefined.

:(before "End Instruction Modifying Transforms")
Transform.push_back(update_instruction_operations);  // idempotent

:(code)
void update_instruction_operations(recipe_ordinal r) {
  trace(9991, "transform") << "--- compute instruction operations for recipe " << get(Recipe, r).name << end();
  recipe& caller = get(Recipe, r);
//?   cerr << "--- compute instruction operations for recipe " << caller.name << '\n';
  for (int index = 0; index < SIZE(caller.steps); ++index) {
    instruction& inst = caller.steps.at(index);
    if (inst.is_label) continue;
    if (!contains_key(Recipe_ordinal, inst.name)) {
      raise << maybe(caller.name) << "instruction " << inst.name << " has no recipe\n" << end();
      continue;
    }
    inst.operation = get(Recipe_ordinal, inst.name);
    // End Instruction Operation Checks
  }
}

// hook to suppress inserting recipe name into errors (for later layers)
string maybe(string s) {
  return s + ": ";
}
> - break-unless t + t:touch-event, is-touch?:boolean <- maybe-convert e:event, touch:variant + break-unless is-touch? # ignore all but 'left-click' events for now # todo: test this - touch-type:number <- get *t, type:offset + touch-type:number <- get t, type:offset is-left-click?:boolean <- equal touch-type, 65513/mouse-left loop-unless is-left-click?, +next-event:label # later exceptions for non-editor touches will go here <global-touch> # send to both editors - _ <- move-cursor-in-editor screen, recipes, *t - sandbox-in-focus?:boolean <- move-cursor-in-editor screen, current-sandbox, *t + _ <- move-cursor-in-editor screen, recipes, t + sandbox-in-focus?:boolean <- move-cursor-in-editor screen, current-sandbox, t *env <- put *env, sandbox-in-focus?:offset, sandbox-in-focus? screen <- update-cursor screen, recipes, current-sandbox, sandbox-in-focus?, env loop +next-event:label @@ -98,8 +98,8 @@ def event-loop screen:address:shared:screen, console:address:shared:console, env # 'resize' event - redraw editor # todo: test this after supporting resize in assume-console { - r:address:resize-event <- maybe-convert e:event, resize:variant - break-unless r + r:resize-event, is-resize?:boolean <- maybe-convert e:event, resize:variant + break-unless is-resize? # if more events, we're still resizing; wait until we stop more-events?:boolean <- has-more-events? console { @@ -582,7 +582,7 @@ def render-code screen:address:shared:screen, s:address:shared:array:character, after <global-type> [ { - redraw-screen?:boolean <- equal *c, 12/ctrl-l + redraw-screen?:boolean <- equal c, 12/ctrl-l break-unless redraw-screen? screen <- render-all screen, env:address:shared:programming-environment-data sync-screen screen @@ -595,7 +595,7 @@ after <global-type> [ after <global-type> [ { - switch-side?:boolean <- equal *c, 14/ctrl-n + switch-side?:boolean <- equal c, 14/ctrl-n break-unless switch-side? sandbox-in-focus?:boolean <- get *env, sandbox-in-focus?:offset sandbox-in-focus? <- not sandbox-in-focus? diff --git a/edit/005-sandbox.mu b/edit/005-sandbox.mu index 0bbd7f85..89f52fb6 100644 --- a/edit/005-sandbox.mu +++ b/edit/005-sandbox.mu @@ -124,7 +124,7 @@ scenario run-and-show-results [ after <global-keypress> [ # F4? load all code and run all sandboxes. { - do-run?:boolean <- equal *k, 65532/F4 + do-run?:boolean <- equal k, 65532/F4 break-unless do-run? screen <- update-status screen, [running... ], 245/grey error?:boolean, env, screen <- run-sandboxes env, screen @@ -614,7 +614,7 @@ scenario scrolling-down-past-bottom-of-sandbox-editor [ after <global-keypress> [ { break-unless sandbox-in-focus? - down?:boolean <- equal *k, 65516/down-arrow + down?:boolean <- equal k, 65516/down-arrow break-unless down? sandbox-bottom:number <- get *current-sandbox, bottom:offset sandbox-cursor:number <- get *current-sandbox, cursor-row:offset @@ -656,7 +656,7 @@ after <update-cursor-special-cases> [ after <global-keypress> [ { break-unless sandbox-in-focus? - up?:boolean <- equal *k, 65517/up-arrow + up?:boolean <- equal k, 65517/up-arrow break-unless up? render-from:number <- get *env, render-from:offset at-beginning?:boolean <- equal render-from, -1 diff --git a/edit/006-sandbox-edit.mu b/edit/006-sandbox-edit.mu index c5537851..ebfac6ac 100644 --- a/edit/006-sandbox-edit.mu +++ b/edit/006-sandbox-edit.mu @@ -66,13 +66,13 @@ after <global-touch> [ # below sandbox editor? pop appropriate sandbox contents back into sandbox editor { sandbox-left-margin:number <- get *current-sandbox, left:offset - click-column:number <- get *t, column: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:shared: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 + click-row:number <- get t, row:offset below-sandbox-editor?:boolean <- greater-or-equal click-row, first-sandbox-begins break-unless below-sandbox-editor? empty-sandbox-editor?:boolean <- empty-editor? current-sandbox diff --git a/edit/007-sandbox-delete.mu b/edit/007-sandbox-delete.mu index e59d333e..aed22244 100644 --- a/edit/007-sandbox-delete.mu +++ b/edit/007-sandbox-delete.mu @@ -67,7 +67,7 @@ scenario deleting-sandboxes [ after <global-touch> [ # on a sandbox delete icon? process delete { - was-delete?:boolean <- delete-sandbox *t, env + was-delete?:boolean <- delete-sandbox t, env break-unless was-delete? hide-screen screen screen <- render-sandbox-side screen, env diff --git a/edit/008-sandbox-test.mu b/edit/008-sandbox-test.mu index c81099f9..c35cf802 100644 --- a/edit/008-sandbox-test.mu +++ b/edit/008-sandbox-test.mu @@ -107,13 +107,13 @@ after <global-touch> [ # check if it's inside the output of any sandbox { sandbox-left-margin:number <- get *current-sandbox, left:offset - click-column:number <- get *t, column: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:shared: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 + 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 output is being clicked on diff --git a/edit/009-sandbox-trace.mu b/edit/009-sandbox-trace.mu index f7476ca8..71eb7cfb 100644 --- a/edit/009-sandbox-trace.mu +++ b/edit/009-sandbox-trace.mu @@ -142,13 +142,13 @@ 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 + 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:shared: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 + 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 diff --git a/edit/011-editor-undo.mu b/edit/011-editor-undo.mu index 07ecb14f..94135346 100644 --- a/edit/011-editor-undo.mu +++ b/edit/011-editor-undo.mu @@ -63,7 +63,7 @@ container editor-data [ # ctrl-z - undo operation after <handle-special-character> [ { - undo?:boolean <- equal *c, 26/ctrl-z + undo?:boolean <- equal c, 26/ctrl-z break-unless undo? undo:address:shared:list:address:shared:operation <- get *editor, undo:offset break-unless undo @@ -81,7 +81,7 @@ after <handle-special-character> [ # ctrl-y - redo operation after <handle-special-character> [ { - redo?:boolean <- equal *c, 25/ctrl-y + redo?:boolean <- equal c, 25/ctrl-y break-unless redo? redo:address:shared:list:address:shared:operation <- get *editor, redo:offset break-unless redo @@ -151,16 +151,17 @@ before <insert-character-end> [ # if previous operation was an insert, coalesce this operation with it break-unless undo op:address:shared:operation <- first undo - typing:address:insert-operation <- maybe-convert *op, typing:variant - break-unless typing - previous-coalesce-tag:number <- get *typing, tag:offset + typing:insert-operation, is-insert?:boolean <- maybe-convert *op, typing:variant + break-unless is-insert? + previous-coalesce-tag:number <- get typing, tag:offset break-unless previous-coalesce-tag before-cursor:address:shared:duplex-list:character <- get *editor, before-cursor:offset insert-until:address:shared:duplex-list:character <- next before-cursor - *typing <- put *typing, insert-until:offset, insert-until - *typing <- put *typing, after-row:offset, cursor-row - *typing <- put *typing, after-column:offset, cursor-column - *typing <- put *typing, after-top-of-screen:offset, top-after + typing <- put typing, insert-until:offset, insert-until + typing <- put typing, after-row:offset, cursor-row + typing <- put typing, after-column:offset, cursor-column + typing <- put typing, after-top-of-screen:offset, top-after + *op <- merge 0/insert-operation, typing break +done-adding-insert-operation:label } # if not, create a new operation @@ -210,19 +211,19 @@ def add-operation editor:address:shared:editor-data, op:address:shared:operation after <handle-undo> [ { - typing:address:insert-operation <- maybe-convert *op, typing:variant - break-unless typing - start:address:shared:duplex-list:character <- get *typing, insert-from:offset - end:address:shared:duplex-list:character <- get *typing, insert-until:offset + typing:insert-operation, is-insert?:boolean <- maybe-convert *op, typing:variant + break-unless is-insert? + start:address:shared:duplex-list:character <- get typing, insert-from:offset + end:address:shared:duplex-list:character <- get typing, insert-until:offset # assert cursor-row/cursor-column/top-of-screen match after-row/after-column/after-top-of-screen before-cursor:address:shared:duplex-list:character <- prev start *editor <- put *editor, before-cursor:offset, before-cursor remove-between before-cursor, end - cursor-row <- get *typing, before-row:offset + cursor-row <- get typing, before-row:offset *editor <- put *editor, cursor-row:offset, cursor-row - cursor-column <- get *typing, before-column:offset + cursor-column <- get typing, before-column:offset *editor <- put *editor, cursor-column:offset, cursor-column - top:address:shared:duplex-list:character <- get *typing, before-top-of-screen:offset + top:address:shared:duplex-list:character <- get typing, before-top-of-screen:offset *editor <- put *editor, top-of-screen:offset, top } ] @@ -410,18 +411,18 @@ scenario editor-redo-typing [ after <handle-redo> [ { - typing:address:insert-operation <- maybe-convert *op, typing:variant - break-unless typing + typing:insert-operation, is-insert?:boolean <- maybe-convert *op, typing:variant + break-unless is-insert? before-cursor <- get *editor, before-cursor:offset - insert-from:address:shared:duplex-list:character <- get *typing, insert-from:offset # ignore insert-to because it's already been spliced away + insert-from:address:shared:duplex-list:character <- get typing, insert-from:offset # ignore insert-to because it's already been spliced away # assert insert-to matches next(before-cursor) insert-range before-cursor, insert-from # assert cursor-row/cursor-column/top-of-screen match after-row/after-column/after-top-of-screen - cursor-row <- get *typing, after-row:offset + cursor-row <- get typing, after-row:offset *editor <- put *editor, cursor-row:offset, cursor-row - cursor-column <- get *typing, after-column:offset + cursor-column <- get typing, after-column:offset *editor <- put *editor, cursor-column:offset, cursor-column - top:address:shared:duplex-list:character <- get *typing, after-top-of-screen:offset + top:address:shared:duplex-list:character <- get typing, after-top-of-screen:offset *editor <- put *editor, top-of-screen:offset, top } ] @@ -730,14 +731,15 @@ before <move-cursor-end> [ undo:address:shared:list:address:shared:operation <- get *editor, undo:offset break-unless undo op:address:shared:operation <- first undo - move:address:move-operation <- maybe-convert *op, move:variant - break-unless move - previous-coalesce-tag:number <- get *move, tag:offset + move:move-operation, is-move?:boolean <- maybe-convert *op, move:variant + break-unless is-move? + previous-coalesce-tag:number <- get move, tag:offset coalesce?:boolean <- equal undo-coalesce-tag, previous-coalesce-tag break-unless coalesce? - *move <- put *move, after-row:offset, cursor-row - *move <- put *move, after-column:offset, cursor-column - *move <- put *move, after-top-of-screen:offset, top-after + move <- put move, after-row:offset, cursor-row + move <- put move, after-column:offset, cursor-column + move <- put move, after-top-of-screen:offset, top-after + *op <- merge 1/move-operation, move break +done-adding-move-operation:label } op:address:shared:operation <- new operation:type @@ -748,14 +750,14 @@ before <move-cursor-end> [ after <handle-undo> [ { - move:address:move-operation <- maybe-convert *op, move:variant - break-unless move + move:move-operation, is-move?:boolean <- maybe-convert *op, move:variant + break-unless is-move? # assert cursor-row/cursor-column/top-of-screen match after-row/after-column/after-top-of-screen - cursor-row <- get *move, before-row:offset + cursor-row <- get move, before-row:offset *editor <- put *editor, cursor-row:offset, cursor-row - cursor-column <- get *move, before-column:offset + cursor-column <- get move, before-column:offset *editor <- put *editor, cursor-column:offset, cursor-column - top:address:shared:duplex-list:character <- get *move, before-top-of-screen:offset + top:address:shared:duplex-list:character <- get move, before-top-of-screen:offset *editor <- put *editor, top-of-screen:offset, top } ] @@ -1378,14 +1380,14 @@ ghi] after <handle-redo> [ { - move:address:move-operation <- maybe-convert *op, move:variant - break-unless move + move:move-operation, is-move?:boolean <- maybe-convert *op, move:variant + break-unless is-move? # assert cursor-row/cursor-column/top-of-screen match after-row/after-column/after-top-of-screen - cursor-row <- get *move, after-row:offset + cursor-row <- get move, after-row:offset *editor <- put *editor, cursor-row:offset, cursor-row - cursor-column <- get *move, after-column:offset + cursor-column <- get move, after-column:offset *editor <- put *editor, cursor-column:offset, cursor-column - top:address:shared:duplex-list:character <- get *move, after-top-of-screen:offset + top:address:shared:duplex-list:character <- get move, after-top-of-screen:offset *editor <- put *editor, top-of-screen:offset, top } ] @@ -1620,18 +1622,19 @@ before <backspace-character-end> [ # if previous operation was an insert, coalesce this operation with it break-unless *undo op:address:shared:operation <- first undo - deletion:address:delete-operation <- maybe-convert *op, delete:variant - break-unless deletion - previous-coalesce-tag:number <- get *deletion, tag:offset + deletion:delete-operation, is-delete?:boolean <- maybe-convert *op, delete:variant + break-unless is-delete? + previous-coalesce-tag:number <- get deletion, tag:offset coalesce?:boolean <- equal previous-coalesce-tag, 1/coalesce-backspace break-unless coalesce? - *deletion <- put *deletion, delete-from:offset, before-cursor - backspaced-so-far:address:shared:duplex-list:character <- get *deletion, deleted-text:offset + deletion <- put deletion, delete-from:offset, before-cursor + backspaced-so-far:address:shared:duplex-list:character <- get deletion, deleted-text:offset insert-range backspaced-cell, backspaced-so-far - *deletion <- put *deletion, deleted-text:offset, backspaced-cell - *deletion <- put *deletion, after-row:offset, cursor-row - *deletion <- put *deletion, after-column:offset, cursor-column - *deletion <- put *deletion, after-top-of-screen:offset, top-after + deletion <- put deletion, deleted-text:offset, backspaced-cell + deletion <- put deletion, after-row:offset, cursor-row + deletion <- put deletion, after-column:offset, cursor-column + deletion <- put deletion, after-top-of-screen:offset, top-after + *op <- merge 2/delete-operation, deletion break +done-adding-backspace-operation:label } # if not, create a new operation @@ -1645,38 +1648,38 @@ before <backspace-character-end> [ after <handle-undo> [ { - deletion:address:delete-operation <- maybe-convert *op, delete:variant - break-unless deletion - anchor:address:shared:duplex-list:character <- get *deletion, delete-from:offset + deletion:delete-operation, is-delete?:boolean <- maybe-convert *op, delete:variant + break-unless is-delete? + anchor:address:shared:duplex-list:character <- get deletion, delete-from:offset break-unless anchor - deleted:address:shared:duplex-list:character <- get *deletion, deleted-text:offset + deleted:address:shared:duplex-list:character <- get deletion, deleted-text:offset old-cursor:address:shared:duplex-list:character <- last deleted insert-range anchor, deleted # assert cursor-row/cursor-column/top-of-screen match after-row/after-column/after-top-of-screen before-cursor <- copy old-cursor - cursor-row <- get *deletion, before-row:offset + cursor-row <- get deletion, before-row:offset *editor <- put *editor, cursor-row:offset, cursor-row - cursor-column <- get *deletion, before-column:offset + cursor-column <- get deletion, before-column:offset *editor <- put *editor, cursor-column:offset, cursor-column - top:address:shared:duplex-list:character <- get *deletion, before-top-of-screen:offset + top:address:shared:duplex-list:character <- get deletion, before-top-of-screen:offset *editor <- put *editor, top-of-screen:offset, top } ] after <handle-redo> [ { - deletion:address:delete-operation <- maybe-convert *op, delete:variant - break-unless deletion - start:address:shared:duplex-list:character <- get *deletion, delete-from:offset - end:address:shared:duplex-list:character <- get *deletion, delete-until:offset + deletion:delete-operation, is-delete?:boolean <- maybe-convert *op, delete:variant + break-unless is-delete? + start:address:shared:duplex-list:character <- get deletion, delete-from:offset + end:address:shared:duplex-list:character <- get deletion, delete-until:offset data:address:shared:duplex-list:character <- get *editor, data:offset remove-between start, end # assert cursor-row/cursor-column/top-of-screen match after-row/after-column/after-top-of-screen - cursor-row <- get *deletion, after-row:offset + cursor-row <- get deletion, after-row:offset *editor <- put *editor, cursor-row:offset, cursor-row - cursor-column <- get *deletion, after-column:offset + cursor-column <- get deletion, after-column:offset *editor <- put *editor, cursor-column:offset, cursor-column - top:address:shared:duplex-list:character <- get *deletion, before-top-of-screen:offset + top:address:shared:duplex-list:character <- get deletion, before-top-of-screen:offset *editor <- put *editor, top-of-screen:offset, top } ] @@ -1845,19 +1848,20 @@ before <delete-character-end> [ # if previous operation was an insert, coalesce this operation with it break-unless undo op:address:shared:operation <- first undo - deletion:address:delete-operation <- maybe-convert *op, delete:variant - break-unless deletion - previous-coalesce-tag:number <- get *deletion, tag:offset + deletion:delete-operation, is-delete?:boolean <- maybe-convert *op, delete:variant + break-unless is-delete? + previous-coalesce-tag:number <- get deletion, tag:offset coalesce?:boolean <- equal previous-coalesce-tag, 2/coalesce-delete break-unless coalesce? delete-until:address:shared:duplex-list:character <- next before-cursor - *deletion <- put *deletion, delete-until:offset, delete-until - deleted-so-far:address:shared:duplex-list:character <- get *deletion, deleted-text:offset + deletion <- put deletion, delete-until:offset, delete-until + deleted-so-far:address:shared:duplex-list:character <- get deletion, deleted-text:offset deleted-so-far <- append deleted-so-far, deleted-cell - *deletion <- put *deletion, deleted-text:offset, deleted-so-far - *deletion <- put *deletion, after-row:offset, cursor-row - *deletion <- put *deletion, after-column:offset, cursor-column - *deletion <- put *deletion, after-top-of-screen:offset, top-after + deletion <- put deletion, deleted-text:offset, deleted-so-far + deletion <- put deletion, after-row:offset, cursor-row + deletion <- put deletion, after-column:offset, cursor-column + deletion <- put deletion, after-top-of-screen:offset, top-after + *op <- merge 2/delete-operation, deletion break +done-adding-delete-operation:label } # if not, create a new operation