> In the Mac glass code the presence of "marked" text (which is tracked in the 
> nsAttrBuffer) signals that an IME is active. In this state the current code 
> assumes that when NSTextInputContext handles a `keyDown:` it will either 
> generate a call to `insertText:replacementRange:` or one of the routines that 
> manipulates the marked (composed) text. But this bug shows that sometimes the 
> IME acts on the event without generating any calls back into glass at all.
> 
> In this PR the logic is simplified: if the NSTextInputContext handles the 
> `keyDown:` and there's marked (composed) text we don't generate a KeyEvent. 
> Otherwise we do. This PR removes the `shouldProcessKeyEvent` flag since it no 
> longer assumes we can catch callbacks to update it correctly.
> 
> The existing code also assumes that the composition phase ends when the 
> NSTextInputContext calls `insertText:replacementRange` to commit the text. 
> This is true but if the user tries to use a dead-key sequence to generate a 
> non-existent character (like an accented 'q') the context will call 
> `insertText` twice while handling one key down event. In that case we can't 
> exit the composition mode upon seeing the first `insertText` call since it 
> will cause us to mis-handle the second one. This PR defers exiting 
> composition mode until the end of `keyDown:`.
> 
> I also updated a few deprecated constants so this file no longer generates 
> compiler warnings.

Martin Fox has updated the pull request with a new target base due to a merge 
or a rebase. The pull request now contains seven commits:

 - Now handling ESC ending the composition state. Minor setEnabled cleanup.
 - Merge remote-tracking branch 'upstream/master' into macimefixes
 - When IM enabled state changes we dismiss the IM window.
 - Merge remote-tracking branch 'upstream/master' into macimefixes
 - Comment tweaks
 - Merge remote-tracking branch 'upstream/master' into macimefixes
 - Modified method of determing which keyDowns are sent as KeyEvents.

-------------

Changes: https://git.openjdk.org/jfx/pull/1351/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1351&range=02
  Stats: 60 lines in 3 files changed: 35 ins; 10 del; 15 mod
  Patch: https://git.openjdk.org/jfx/pull/1351.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1351/head:pull/1351

PR: https://git.openjdk.org/jfx/pull/1351

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