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Issue #2124/2662: Optimize overflow shorthand parsing and serialization

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erixreyes 2025-07-05 05:47:31 +08:00 • committed by roytam1
commit 7626c99ceb
2 changed files with 24 additions and 6 deletions
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7
layout/style/nsCSSProps.cpp
View file

@ -3181,6 +3181,13 @@ static const nsCSSPropertyID gSizeLogicalGroupTable[] = {
eCSSProperty_UNKNOWN eCSSProperty_UNKNOWN
}; };
static const nsCSSPropertyID gOverflowLogicalGroupTable[] = {
eCSSProperty_overflow_y,
eCSSProperty_overflow_x,
eCSSProperty_UNKNOWN
};
const nsCSSPropertyID* const const nsCSSPropertyID* const
nsCSSProps::kLogicalGroupTable[eCSSPropertyLogicalGroup_COUNT] = { nsCSSProps::kLogicalGroupTable[eCSSPropertyLogicalGroup_COUNT] = {
#define CSS_PROP_LOGICAL_GROUP_SHORTHAND(id_) g##id_##SubpropTable, #define CSS_PROP_LOGICAL_GROUP_SHORTHAND(id_) g##id_##SubpropTable,

23
layout/style/nsComputedDOMStyle.cpp
View file

@ -4750,16 +4750,27 @@ nsComputedDOMStyle::DoGetOverflow()
{ {
const nsStyleDisplay* display = StyleDisplay(); const nsStyleDisplay* display = StyleDisplay();
if (display->mOverflowX != display->mOverflowY) { if (display->mOverflowX == display->mOverflowY) {
// No value to return. We can't express this combination of
// values as a shorthand.
return nullptr;
}
RefPtr<nsROCSSPrimitiveValue> val = new nsROCSSPrimitiveValue; RefPtr<nsROCSSPrimitiveValue> val = new nsROCSSPrimitiveValue;
val->SetIdent(nsCSSProps::ValueToKeywordEnum(display->mOverflowX, val->SetIdent(nsCSSProps::ValueToKeywordEnum(display->mOverflowX,
nsCSSProps::kOverflowKTable)); nsCSSProps::kOverflowKTable));
return val.forget(); return val.forget();
}
RefPtr<nsROCSSPrimitiveValue> val = new nsROCSSPrimitiveValue;
nsAutoString result;
nsCSSKeyword xKeyword = nsCSSProps::ValueToKeywordEnum(display->mOverflowX,
nsCSSProps::kOverflowKTable);
nsCSSKeyword yKeyword = nsCSSProps::ValueToKeywordEnum(display->mOverflowY,
nsCSSProps::kOverflowKTable);
result.AppendASCII(nsCSSKeywords::GetStringValue(xKeyword).get());
result.Append(char16_t(' '));
result.AppendASCII(nsCSSKeywords::GetStringValue(yKeyword).get());
val->SetString(result);
return val.forget();
} }
already_AddRefed<CSSValue> already_AddRefed<CSSValue>