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Bug 503657. Treat a newline character as a valid boundary for line breaking analysis. r=smontagu

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--HG--
extra : rebase_source : f64e4629aca2c394f7331c342ad33ac84223c429
This commit is contained in:
Robert O'Callahan 2009-09-02 14:46:48 +12:00
parent d70f216852
commit cb2741ab96
1 changed files with 14 additions and 2 deletions
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16
layout/generic/nsTextFrameThebes.cpp
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@ -813,6 +813,18 @@ FindLineContainer(nsIFrame* aFrame)
return aFrame;
}
static PRBool
IsLineBreakingWhiteSpace(PRUnichar aChar)
{
// 0x0A (\n) is not handled as white-space by the line breaker, since
// we break before it, if it isn't transformed to a normal space.
// (If we treat it as normal white-space then we'd only break after it.)
// However, it does induce a line break or is converted to a regular
// space, and either way it can be used to bound the region of text
// that needs to be analyzed for line breaking.
return nsLineBreaker::IsSpace(aChar) || aChar == 0x0A;
}
static PRBool
TextContainsLineBreakerWhiteSpace(const void* aText, PRUint32 aLength,
PRBool aIsDoubleByte)
@ -821,14 +833,14 @@ TextContainsLineBreakerWhiteSpace(const void* aText, PRUint32 aLength,
if (aIsDoubleByte) {
const PRUnichar* chars = static_cast<const PRUnichar*>(aText);
for (i = 0; i < aLength; ++i) {
if (nsLineBreaker::IsSpace(chars[i]))
if (IsLineBreakingWhiteSpace(chars[i]))
return PR_TRUE;
}
return PR_FALSE;
} else {
const PRUint8* chars = static_cast<const PRUint8*>(aText);
for (i = 0; i < aLength; ++i) {
if (nsLineBreaker::IsSpace(chars[i]))
if (IsLineBreakingWhiteSpace(chars[i]))
return PR_TRUE;
}
return PR_FALSE;