Take overflow-wrap into account when calculating...
parent
d147d954e9
commit
54c5407dc7
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@ -1072,6 +1072,34 @@ gfxTextRun::GetAdvanceWidth(Range aRange, PropertyProvider *aProvider,
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return result + GetAdvanceForGlyphs(ligatureRange);
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}
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gfxFloat
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gfxTextRun::GetMinAdvanceWidth(Range aRange)
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{
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MOZ_ASSERT(aRange.end <= GetLength(), "Substring out of range");
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Range ligatureRange = aRange;
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ShrinkToLigatureBoundaries(&ligatureRange);
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gfxFloat result = std::max(
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ComputePartialLigatureWidth(Range(aRange.start, ligatureRange.start),
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nullptr),
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ComputePartialLigatureWidth(Range(ligatureRange.end, aRange.end),
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nullptr));
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// XXX Do we need to take spacing into account? When each grapheme cluster
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// takes its own line, we shouldn't be adding spacings around them.
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gfxFloat clusterAdvance = 0;
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for (uint32_t i = ligatureRange.start; i < ligatureRange.end; ++i) {
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clusterAdvance += GetAdvanceForGlyph(i);
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if (i + 1 == ligatureRange.end || IsClusterStart(i + 1)) {
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result = std::max(result, clusterAdvance);
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clusterAdvance = 0;
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}
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}
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return result;
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}
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bool
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gfxTextRun::SetLineBreaks(Range aRange,
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bool aLineBreakBefore, bool aLineBreakAfter,
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@ -298,6 +298,12 @@ public:
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return GetAdvanceWidth(Range(this), nullptr);
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}
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/**
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* Computes the minimum advance width for a substring assuming line
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* breaking is allowed everywhere.
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*/
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gfxFloat GetMinAdvanceWidth(Range aRange);
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/**
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* Clear all stored line breaks for the given range (both before and after),
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* and then set the line-break state before aRange.start to aBreakBefore and
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@ -8244,6 +8244,16 @@ nsTextFrame::AddInlineMinISizeForFlow(nsRenderingContext *aRenderingContext,
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return;
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}
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// If overflow-wrap is break-word, we can wrap everywhere.
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if (textStyle->WordCanWrap(this)) {
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aData->OptionallyBreak();
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aData->mCurrentLine +=
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textRun->GetMinAdvanceWidth(Range(start, flowEndInTextRun));
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aData->mTrailingWhitespace = 0;
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aData->OptionallyBreak();
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return;
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}
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AutoTArray<bool,BIG_TEXT_NODE_SIZE> hyphBuffer;
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bool *hyphBreakBefore = nullptr;
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if (hyphenating) {
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