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Destroy chained RuleProcessorData interatively. b=323504 r+sr=bzbarsky

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This commit is contained in:
dbaron%dbaron.org 2006-04-27 00:35:05 +00:00
parent 44ce73a25f
commit b9a3e06d7d
2 changed files with 27 additions and 4 deletions
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28
layout/style/nsCSSRuleProcessor.cpp
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@ -810,10 +810,30 @@ RuleProcessorData::~RuleProcessorData()
{
MOZ_COUNT_DTOR(RuleProcessorData);
if (mPreviousSiblingData)
mPreviousSiblingData->Destroy(mPresContext);
if (mParentData)
mParentData->Destroy(mPresContext);
// Destroy potentially long chains of previous sibling and parent data
// without more than one level of recursion.
if (mPreviousSiblingData || mParentData) {
nsAutoVoidArray destroyQueue;
destroyQueue.AppendElement(this);
do {
RuleProcessorData *d = NS_STATIC_CAST(RuleProcessorData*,
destroyQueue.FastElementAt(destroyQueue.Count() - 1));
destroyQueue.RemoveElementAt(destroyQueue.Count() - 1);
if (d->mPreviousSiblingData) {
destroyQueue.AppendElement(d->mPreviousSiblingData);
d->mPreviousSiblingData = nsnull;
}
if (d->mParentData) {
destroyQueue.AppendElement(d->mParentData);
d->mParentData = nsnull;
}
if (d != this)
d->Destroy(mPresContext);
} while (destroyQueue.Count());
}
delete mLanguage;
}

3
layout/style/nsIStyleRuleProcessor.h
View File

@ -99,6 +99,9 @@ struct RuleProcessorData {
PRInt32 mEventState; // if content, eventStateMgr->GetContentState()
PRInt32 mNameSpaceID; // if content, content->GetNameSapce()
const nsAttrValue* mClasses; // if styled content, styledcontent->GetClasses()
// mPreviousSiblingData and mParentData are always RuleProcessorData
// and never a derived class. They are allocated lazily, when
// selectors require matching of prior siblings or ancestors.
RuleProcessorData* mPreviousSiblingData;
RuleProcessorData* mParentData;