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Cache line breaks that are not in the current frame due to bidi resolution. Bug 595435, r=roc, a=blocker

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This commit is contained in:
Simon Montagu 2010-11-07 11:56:25 +02:00
parent 03f2ba2fda
commit bf18664d80
1 changed files with 15 additions and 4 deletions
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19
layout/generic/nsTextFrameThebes.cpp
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@ -6396,6 +6396,7 @@ nsTextFrame::ReflowText(nsLineLayout& aLineLayout, nscoord aAvailableWidth,
// Restrict preformatted text to the nearest newline
PRInt32 newLineOffset = -1; // this will be -1 or a content offset
PRInt32 contentNewLineOffset = -1;
// Pointer to the nsGkAtoms::newline set on this frame's element
NewlineProperty* cachedNewlineOffset = nsnull;
if (textStyle->NewlineIsSignificant()) {
@ -6404,9 +6405,18 @@ nsTextFrame::ReflowText(nsLineLayout& aLineLayout, nscoord aAvailableWidth,
if (cachedNewlineOffset && cachedNewlineOffset->mStartOffset <= offset &&
(cachedNewlineOffset->mNewlineOffset == -1 ||
cachedNewlineOffset->mNewlineOffset >= offset)) {
newLineOffset = cachedNewlineOffset->mNewlineOffset;
contentNewLineOffset = cachedNewlineOffset->mNewlineOffset;
} else {
newLineOffset = FindChar(frag, offset, length, '\n');
contentNewLineOffset = FindChar(frag, offset,
mContent->TextLength() - offset, '\n');
}
if (contentNewLineOffset < offset + length) {
/*
The new line offset could be outside this frame if the frame has been
split by bidi resolution. In that case we won't use it in this reflow
(newLineOffset will remain -1), but we will still cache it in mContent
*/
newLineOffset = contentNewLineOffset;
}
if (newLineOffset >= 0) {
length = newLineOffset + 1 - offset;
@ -6766,7 +6776,8 @@ nsTextFrame::ReflowText(nsLineLayout& aLineLayout, nscoord aAvailableWidth,
// Updated the cached NewlineProperty, or delete it.
if (contentLength < maxContentLength &&
textStyle->NewlineIsSignificant() &&
(newLineOffset < 0 || mContentOffset + contentLength <= newLineOffset)) {
(contentNewLineOffset < 0 ||
mContentOffset + contentLength <= contentNewLineOffset)) {
if (!cachedNewlineOffset) {
cachedNewlineOffset = new NewlineProperty;
if (cachedNewlineOffset) {
@ -6779,7 +6790,7 @@ nsTextFrame::ReflowText(nsLineLayout& aLineLayout, nscoord aAvailableWidth,
}
if (cachedNewlineOffset) {
cachedNewlineOffset->mStartOffset = offset;
cachedNewlineOffset->mNewlineOffset = newLineOffset;
cachedNewlineOffset->mNewlineOffset = contentNewLineOffset;
}
} else if (cachedNewlineOffset) {
mContent->DeleteProperty(nsGkAtoms::newline);