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Issue #1914 - Implement white-space: break-spaces

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This also simplifies GetCSSWhitespaceToCompressionMode (FFS with the function
names, Mozilla!) to be less fragile.
This commit is contained in:
Moonchild 2022-06-10 07:35:22 +00:00 • committed by roytam1
commit afbfbcb1e1
9 changed files with 57 additions and 37 deletions
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16
gfx/thebes/gfxTextRun.cpp
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@ -851,6 +851,7 @@ gfxTextRun::BreakAndMeasureText(uint32_t aStart, uint32_t aMaxLength,
bool *aUsedHyphenation,
uint32_t *aLastBreak,
bool aCanWordWrap,
bool aCanWhitespaceWrap,
gfxBreakPriority *aBreakPriority)
{
aMaxLength = std::min(aMaxLength, GetLength() - aStart);
@ -918,7 +919,15 @@ gfxTextRun::BreakAndMeasureText(uint32_t aStart, uint32_t aMaxLength,
aCanWordWrap && mCharacterGlyphs[i].IsClusterStart() &&
*aBreakPriority <= gfxBreakPriority::eWordWrapBreak;
if (atBreak || wordWrapping) {
bool whitespaceWrapping = false;
if (i > aStart) {
// The spec says the breaking opportunity is *after* whitespace.
auto const& g = mCharacterGlyphs[i - 1];
whitespaceWrapping = aCanWhitespaceWrap &&
(g.CharIsSpace() || g.CharIsTab() || g.CharIsNewline());
}
if (atBreak || wordWrapping || whitespaceWrapping) {
gfxFloat hyphenatedAdvance = advance;
if (atHyphenationBreak) {
hyphenatedAdvance += aProvider->GetHyphenWidth();
@ -930,8 +939,9 @@ gfxTextRun::BreakAndMeasureText(uint32_t aStart, uint32_t aMaxLength,
lastBreakTrimmableChars = trimmableChars;
lastBreakTrimmableAdvance = trimmableAdvance;
lastBreakUsedHyphenation = atHyphenationBreak;
*aBreakPriority = atBreak ? gfxBreakPriority::eNormalBreak
: gfxBreakPriority::eWordWrapBreak;
*aBreakPriority = (atBreak || whitespaceWrapping)
? gfxBreakPriority::eNormalBreak
: gfxBreakPriority::eWordWrapBreak;
}
width += advance;