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Bug 989965 - Resolve style for pseudo-elements correctly when style rules that have user action pseudo-classes on them are present. r=bzbarsky

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Cameron McCormack
2014-04-02 15:08:52 +11:00
parent d626db095c
commit a9b2a1c1f3
4 changed files with 23 additions and 5 deletions
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13
layout/style/nsCSSRuleProcessor.cpp
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@@ -2435,6 +2435,19 @@ void ContentEnumFunc(const RuleValue& value, nsCSSSelector* aSelector,
if (selector->IsPseudoElement()) {
PseudoElementRuleProcessorData* pdata =
static_cast<PseudoElementRuleProcessorData*>(data);
if (!pdata->mPseudoElement && selector->mPseudoClassList) {
// We can get here when calling getComputedStyle(aElt, aPseudo) if:
//
// * aPseudo is a pseudo-element that supports a user action
// pseudo-class, like "::-moz-placeholder";
// * there is a style rule that uses a pseudo-class on this
// pseudo-element in the document, like ::-moz-placeholder:hover; and
// * aElt does not have such a pseudo-element.
//
// We know that the selector can't match, since there is no element for
// the user action pseudo-class to match against.
return;
}
if (!StateSelectorMatches(pdata->mPseudoElement, aSelector, nodeContext,
data->mTreeMatchContext)) {
return;