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Issue #2078 - Part 5: Ensure :is() and :where() are given proper weights

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FranklinDM 2023-02-18 23:27:06 +08:00 • committed by roytam1
commit 4ece7873e0
1 changed files with 21 additions and 6 deletions
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27
layout/style/StyleRule.cpp
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@ -537,14 +537,29 @@ int32_t nsCSSSelector::CalcWeightWithoutNegations() const
weight += 0x000100;
list = list->mNext;
}
// FIXME (bug 561154): This is incorrect for :-moz-any(), which isn't
// really a pseudo-class. In order to handle :-moz-any() correctly,
// we need to compute specificity after we match, based on which
// option we matched with (and thus also need to try the
// highest-specificity options first).
nsPseudoClassList *plist = mPseudoClassList;
while (nullptr != plist) {
weight += 0x000100;
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;
}
slist = slist->mNext;
}
}
weight += pseudoClassWeight;
plist = plist->mNext;
}
nsAttrSelector* attr = mAttrList;