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Issue #1593 - Part 1: Import William Chen's patches w/o selector implementation, fixed up.

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This commit is contained in:
Jeremy Andrews 2021-11-04 03:47:57 -05:00 • committed by roytam1
commit 7472bc02be
10 changed files with 273 additions and 32 deletions
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35
layout/style/nsRuleProcessorData.h
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@ -164,6 +164,23 @@ struct MOZ_STACK_CLASS TreeMatchContext {
mStyleScopes.TruncateLength(mStyleScopes.Length() - 1);
}
}
void PushShadowHost(mozilla::dom::Element* aElement)
{
NS_PRECONDITION(aElement, "aElement must not be null");
if (aElement->GetShadowRoot()) {
mShadowHosts.AppendElement(aElement);
}
}
void PopShadowHost(mozilla::dom::Element* aElement)
{
NS_PRECONDITION(aElement, "aElement must not be null");
if (mShadowHosts.SafeLastElement(nullptr) == aElement) {
mShadowHosts.TruncateLength(mShadowHosts.Length() - 1);
}
}
bool PopStyleScopeForSelectorMatching(mozilla::dom::Element* aElement)
{
@ -233,6 +250,7 @@ struct MOZ_STACK_CLASS TreeMatchContext {
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: mPushedAncestor(false)
, mPushedStyleScope(false)
, mPushedShadowHost(false)
, mTreeMatchContext(aTreeMatchContext)
, mElement(nullptr)
{
@ -245,8 +263,10 @@ struct MOZ_STACK_CLASS TreeMatchContext {
mElement = aElement;
mPushedAncestor = true;
mPushedStyleScope = true;
mPushedShadowHost = true;
mTreeMatchContext.mAncestorFilter.PushAncestor(aElement);
mTreeMatchContext.PushStyleScope(aElement);
mTreeMatchContext.PushShadowHost(aElement);
}
}
@ -278,11 +298,15 @@ struct MOZ_STACK_CLASS TreeMatchContext {
if (mPushedStyleScope) {
mTreeMatchContext.PopStyleScope(mElement);
}
if (mPushedShadowHost) {
mTreeMatchContext.PopShadowHost(mElement);
}
}
private:
bool mPushedAncestor;
bool mPushedStyleScope;
bool mPushedShadowHost;
TreeMatchContext& mTreeMatchContext;
mozilla::dom::Element* mElement;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
@ -342,6 +366,11 @@ struct MOZ_STACK_CLASS TreeMatchContext {
// The document we're working with.
nsIDocument* const mDocument;
// Only selectors that contain :host or :host-context pseudo class
// should be matched against elements. All other selectors should not
// match.
bool mOnlyMatchHostPseudo;
// Root of scoped stylesheet (set and unset by the supplier of the
// scoped stylesheet).
nsIContent* mScopedRoot;
@ -383,6 +412,9 @@ struct MOZ_STACK_CLASS TreeMatchContext {
// <style scoped> child).
AutoTArray<mozilla::dom::Element*, 1> mStyleScopes;
// List of ancestor elements that are a shadow root host.
AutoTArray<mozilla::dom::Element*, 1> mShadowHosts;
// The current style scope element for selector matching.
mozilla::dom::Element* mCurrentStyleScope;
@ -396,6 +428,7 @@ struct MOZ_STACK_CLASS TreeMatchContext {
, mHaveSpecifiedScope(false)
, mVisitedHandling(aVisitedHandling)
, mDocument(aDocument)
, mOnlyMatchHostPseudo(false)
, mScopedRoot(nullptr)
, mIsHTMLDocument(aDocument->IsHTMLDocument())
, mCompatMode(aDocument->GetCompatibilityMode())
@ -437,6 +470,7 @@ struct MOZ_STACK_CLASS ElementDependentRuleProcessorData :
: RuleProcessorData(aPresContext, aRuleWalker)
, mElement(aElement)
, mTreeMatchContext(aTreeMatchContext)
, mElementIsFeatureless(false)
{
NS_ASSERTION(aElement, "null element leaked into SelectorMatches");
NS_ASSERTION(aElement->OwnerDoc(), "Document-less node here?");
@ -446,6 +480,7 @@ struct MOZ_STACK_CLASS ElementDependentRuleProcessorData :
mozilla::dom::Element* const mElement; // weak ref, must not be null
TreeMatchContext& mTreeMatchContext;
bool mElementIsFeatureless;
};
struct MOZ_STACK_CLASS ElementRuleProcessorData :