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Bug 758885. Don't apply the dynamic :hover reresolution skipping optimization to selectors which can match on mutable state other than :hover. r=dbaron

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This commit is contained in:
Boris Zbarsky 2012-05-29 00:17:45 -04:00
parent d8425605ad
commit e7ff5ec8dd
2 changed files with 20 additions and 7 deletions
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9
layout/base/nsCSSFrameConstructor.cpp
View File

@ -8092,14 +8092,9 @@ nsCSSFrameConstructor::ContentStateChanged(nsIContent* aContent,
primaryFrame->ContentStatesChanged(aStateMask);
}
if (aStateMask.HasState(NS_EVENT_STATE_HOVER) &&
!aElement->HasFlag(NODE_HAS_RELEVANT_HOVER_RULES)) {
aStateMask &= ~NS_EVENT_STATE_HOVER;
}
nsRestyleHint rshint = aStateMask.IsEmpty() ?
nsRestyleHint(0) :
styleSet->HasStateDependentStyle(presContext, aElement, aStateMask);
nsRestyleHint rshint =
styleSet->HasStateDependentStyle(presContext, aElement, aStateMask);
if (aStateMask.HasState(NS_EVENT_STATE_HOVER) && rshint != 0) {
++mHoverGeneration;

18
layout/style/nsCSSRuleProcessor.cpp
View File

@ -2391,6 +2391,24 @@ nsCSSRuleProcessor::HasStateDependentStyle(StateRuleProcessorData* aData)
// states passed in are relevant here.
if ((possibleChange & ~hint) &&
states.HasAtLeastOneOfStates(aData->mStateMask) &&
// We can optimize away testing selectors that only involve :hover, a
// namespace, and a tag name against nodes that don't have the
// NODE_HAS_RELEVANT_HOVER_RULES flag: such a selector didn't match
// the tag name or namespace the first time around (since the :hover
// didn't set the NODE_HAS_RELEVANT_HOVER_RULES flag), so it won't
// match it now. Check for our selector only having :hover states, or
// the element having the hover rules flag, or the selector having
// some sort of non-namespace, non-tagname data in it.
(states != NS_EVENT_STATE_HOVER ||
aData->mElement->HasFlag(NODE_HAS_RELEVANT_HOVER_RULES) ||
selector->mIDList || selector->mClassList ||
// We generally expect an mPseudoClassList, since we have a :hover.
// The question is whether we have anything else in there.
(selector->mPseudoClassList &&
(selector->mPseudoClassList->mNext ||
selector->mPseudoClassList->mType !=
nsCSSPseudoClasses::ePseudoClass_hover)) ||
selector->mAttrList || selector->mNegations) &&
SelectorMatches(aData->mElement, selector, nodeContext,
aData->mTreeMatchContext) &&
SelectorMatchesTree(aData->mElement, selector->mNext,