622247 - Remove the hack for bug 23558

Status: RESOLVED FIXED

(Core :: DOM: Editor, defect)

Description

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Bug 23558 fixed the bug by hacky code. That makes a problem for implementing DOM3 composition event.

If first composition string in a transaction is empty string, editor does nothing. See nsPlaintextEditor::UpdateIMEComposition(). Against this, nsTextStore dispatches dummy text event. This will cause wrong composition event behavior. Therefore, I need to remove the hack first.

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Attachment: Patch

Comment 2

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Attachment: Patch

Comment 3

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

Comment on attachment 595342 [details] [diff] [review]
Patch

Now, aTextRangeList must not be NULL even if OOM happened.

mIMETextNode is already NULL after InsertText. If the composition string is empty, nsEditor::InsertTextIntoTextNodeImpl() sets NULL.
http://mxr.mozilla.org/mozilla-central/source/editor/libeditor/base/nsEditor.cpp#2490

By this change, empty text event causes deleting selected text even if it's fired immediately after compositionstart event. This is important for implementing TSF of Windows. And also, such behavior is better for consistency with other actions.

The bugs which caused current hacky implementation are tested by the new automated tests.

Comment 4

[(no longer active)]

Comment on attachment 595342 [details] [diff] [review]
Patch

Review of attachment 595342 [details] [diff] [review]:
-----------------------------------------------------------------

r=me with the blow.

::: editor/libeditor/text/nsPlaintextEditor.cpp
@@ +978,2 @@
>  
> +  if (true) {

Please remove this.

Comment 5

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

(In reply to Ehsan Akhgari [:ehsan] from comment #4)
> ::: editor/libeditor/text/nsPlaintextEditor.cpp
> @@ +978,2 @@
> >  
> > +  if (true) {
> 
> Please remove this.

Did you mean, should I use just |{}| instead of |if () {}|? The block is needed for nsAutoPlaceHolderBatch. After it's destroyed, we need to call NotifyEditorObservers().

Comment 6

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)]

I removed |if (true)|, it's not just |{}|.
https://hg.mozilla.org/integration/mozilla-inbound/rev/2eaea6a86276

Comment 7

[Marco Bonardo [:mak]]

https://hg.mozilla.org/mozilla-central/rev/2eaea6a86276