Closed Bug 312620 Opened 17 years ago Closed 17 years ago
Bidi: Caret doesn't move correctly when arrowing where line wraps, if the wrapped line starts with a single reverse-direction character
In a LTR textarea, when a line wraps, and following the point where it wraps is a single RTL character, pressing right-arrow at the beginning of the wrapped line (next to the RTL character) does not move the caret. Pressing right arrow again moves the caret two characters to the right. The same is correct for the reverse situation (RTL textarea, LTR character, using right arrow). The behavior somewhat changes if the patch for bug 305798 is applied: The first arrow does not move the caret (as before), but the next arrow moves the caret one character, as expected. This happens consistently since the fix for bug 303399. Before that, it only happened sporadically, depending on previous selection actions done outside the textarea. Testcase coming up.
Self documenting. NOTE: depending on your default fonts/sizes, you might need to adjust the number of characters in the first line of each textarea so that the reverse-direction character will appear at the beginning of the second line.
This bug turns out to be a leftover from bug 301033, and this patch completes the fix to that bug. In 301033 I changed BidiLevelFromMove() to receive a aHint parameter, and use it instead of mHint (because MoveCaret() only sets mHint correctly before it exists, much after it calls BidiLevelFromMove()). However, BidiLevelFromMove() is still calling GetPrevNextBidiLevels(), which uses mHint. So we need to pass the hint as a parameter to GetPrevNextBidiLevels() as well. Instead of changing all the callers to GetPrevNextBidiLevels() to add the extra parameter, I created a private version of it which receives the parameter, and wrapped it with a method with the original signature which passes mHint, so the only caller which had to be changed was the one I care about.
Checking in layout/generic/nsSelection.cpp; /cvsroot/mozilla/layout/generic/nsSelection.cpp,v <-- nsSelection.cpp new revision: 3.206; previous revision: 3.205 done
Status: NEW → RESOLVED
Closed: 17 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla1.9alpha
Attachment #199762 - Flags: approval1.8.1? → branch-1.8.1?(roc)
Attachment #199762 - Flags: approval-branch-1.8.1?(roc) → approval-branch-1.8.1+
Checked in to 1.8 branch: Checking in mozilla/layout/generic/nsSelection.cpp; /cvsroot/mozilla/layout/generic/nsSelection.cpp,v <-- nsSelection.cpp new revision: 188.8.131.52; previous revision: 184.108.40.206 done
Target Milestone: mozilla1.9alpha → mozilla1.8.1
Component: Layout: BiDi Hebrew & Arabic → Layout: Text
QA Contact: zach → layout.fonts-and-text
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