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Issue #1823 - Ensure :host() and :host-context() are given proper weights

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FranklinDM 2023-02-19 21:16:07 +08:00 • committed by roytam1
commit ba7e29a052
1 changed files with 21 additions and 15 deletions
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36
layout/style/StyleRule.cpp
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@ -541,22 +541,28 @@ int32_t nsCSSSelector::CalcWeightWithoutNegations() const
while (nullptr != plist) {
int pseudoClassWeight = 0x000100;
// XXX(franklindm): Check for correctness.
// The specificity of the :where() pseudo-class is always zero.
if (plist->mType == CSSPseudoClassType::where) {
pseudoClassWeight = 0;
} else if (nsCSSPseudoClasses::HasForgivingSelectorListArg(plist->mType)) {
// The specificity of the :is() pseudo-class is replaced by the
// specificity of its most specific argument.
pseudoClassWeight = 0;
nsCSSSelectorList* slist = plist->u.mSelectorList;
while (slist) {
int currentWeight = slist->mSelectors ?
slist->mWeight :
0;
if (currentWeight > pseudoClassWeight) {
pseudoClassWeight = currentWeight;
if (nsCSSPseudoClasses::HasSelectorListArg(plist->mType) &&
plist->mType != CSSPseudoClassType::mozAny) {
// The specificity of :host() and :host-context is that of a
// pseudo-class, plus the specificity of its argument.
if (plist->mType != CSSPseudoClassType::host &&
plist->mType != CSSPseudoClassType::hostContext) {
pseudoClassWeight = 0;
}
// The specificity of the :where() pseudo-class is always zero.
if (plist->mType != CSSPseudoClassType::where) {
// The specificity of the :is() pseudo-class is replaced by the
// specificity of its most specific argument.
nsCSSSelectorList* slist = plist->u.mSelectorList;
while (slist) {
int currentWeight = slist->mSelectors ?
slist->mWeight :
0;
if (currentWeight > pseudoClassWeight) {
pseudoClassWeight = currentWeight;
}
slist = slist->mNext;
}
slist = slist->mNext;
}
}
weight += pseudoClassWeight;