Currently, when selection is collapsed at an empty text node, the behavior of each major browser is different.
When you remove the last character of non-empty text node followed by empty text nodes, Chromium removes all following empty text nodes. However, Edge never removes empty text nodes even when selection is collapsed at an empty text node.
With this patch, our behavior becomes same as Edge. I think that we should take this for keeping backward compatibility since Gecko never removes empty text nodes. So, in other words, this patch makes Backspace key press at an empty text node modify the preceding non-empty text node.
When you remove the first character of non-empty text node preceded with empty text nodes, Edge removes all preceding empty text nodes. However, Chromium and Gecko keeps previous empty text nodes than caret position. So, we should keep current behavior for backward compatibility. In other words, this patch makes Delete key press at an empty text node modify the following non-empty text node and keep current behavior.
The fixing approach of this is, making WSRunObject::PriorVisibleNode() and WSRunObject::NextVisibleNode() ignore empty text node. This should make sense because empty text node is not a visible node. (On the other hand, when the DOMPoint has a null character, it should treat as visible character. That is visible with Unicode codepoint.)
MozReview-Commit-ID: 11YtqBktEvK
--HG--
extra : rebase_source : 70fa858866cc768179c1ca6a869e1a5c7cfe6e1a
Currently, editor code uses following style (or similar style) in a lot of places:
if (foo)
{
}
else
{
}
This patch fixes this as conforming to our coding rules, i.e., it becomes:
if (foo) {
} else {
}
Additionally, this fixes other odd control statements in the files which include above issue because it's difficult to find following issues with searching the files:
* if (foo) bar;
* if (foo) { bar; }
* if (foo)
bar;
Finally, if it becomes much simpler than current code, this patch rewrites existing code with "early return style". But this case is only a few places because this is risky.
MozReview-Commit-ID: 2Gs26goWXrF
--HG--
extra : rebase_source : 603f9003a3566b3203bdeb27dc73ac33502d2853
In our coding rules, variable names of nsresult should be rv. Indeed, when you see |rv| in the code, you must assume that its type if nsresult.
However, a lot of code under editor/ uses |res| for the variables of nsresult. Let's replace |res| with |rv|.
And this patch improves following points:
1. When |rv| is set in both |if| and |else| block and they are check outside of them, this moves the check into each |if| and |else| block because even if the failure is notified with warning, you cannot see which case was performed and failed. This change makes it clear.
2. When |return rv;| returns non-error code because |rv| is checked with NS_ENSURE_SUCCESS() immediately before, setting replacing it with |return NS_OK;| is clearer.
3. Move declaration of |nsresult rv| into smaller scope as far as possible. This prevents setting rv to unexpected value and easier to check its value at reading the code.
MozReview-Commit-ID: 9MAqj7sFey3
--HG--
extra : rebase_source : 0fd316b851ea616b3a95d8c1afc111ff55e11993
Perhaps, there may be better name like WhitespaceRunObject or something, however, for now keep using the term because I don't understand well what it does.
With this patch, following objects are renamed:
nsWSRunObject -> mozilla::WSRunObject
WSType -> mozilla::WSType
nsWSRunObject::WSFragment -> mozilla::WSRunObject::WSFragment
nsWSRunObject::WSPoint -> mozilla::WSRunObject::WSPoint
MozReview-Commit-ID: JgAWiPjOtMW
--HG--
rename : editor/libeditor/nsWSRunObject.cpp => editor/libeditor/WSRunObject.cpp
rename : editor/libeditor/nsWSRunObject.h => editor/libeditor/WSRunObject.h
Masayuki Nakano
Andrew McCreight