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Support CSS shadow parts

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Basilisk-Dev 2026-05-11 19:33:30 -04:00 • committed by EAZYBLACK
commit b2d422ae49
10 changed files with 167 additions and 32 deletions
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1
dom/base/nsGkAtomList.h
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@ -1003,6 +1003,7 @@ GK_ATOM(parameter, "parameter")
GK_ATOM(parent, "parent")
GK_ATOM(parentfocused, "parentfocused")
GK_ATOM(parsetype, "parsetype")
GK_ATOM(part, "part")
GK_ATOM(password, "password")
GK_ATOM(pattern, "pattern")
GK_ATOM(patternSeparator, "pattern-separator")

35
dom/xbl/nsBindingManager.cpp
View file

@ -823,16 +823,37 @@ nsBindingManager::WalkAllRules(nsIStyleRuleProcessor::EnumFunc aFunc,
}
}
// The approach in WalkAllShadowRootHostRules seems reasonable on the surface and reminds me of what is done with mScopedRoot elsewhere. But something important is missing, either here or in the code that would normally use it.
void
nsBindingManager::WalkAllShadowRootHostRules(nsIStyleRuleProcessor::EnumFunc aFunc,
ElementDependentRuleProcessorData* aData)
{
aData->mTreeMatchContext.mOnlyMatchHostPseudo = true;
WalkAllRules(aFunc, aData, true);
aData->mTreeMatchContext.mOnlyMatchHostPseudo = false;
}
{
if (!mBoundContentSet) {
return;
}
bool oldOnlyMatchHostPseudo = aData->mTreeMatchContext.mOnlyMatchHostPseudo;
nsIContent* oldScopedRoot = aData->mTreeMatchContext.mScopedRoot;
aData->mTreeMatchContext.mOnlyMatchHostPseudo = true;
for (auto iter = mBoundContentSet->Iter(); !iter.Done(); iter.Next()) {
nsIContent* boundContent = iter.Get()->GetKey();
ShadowRoot* shadowRoot = boundContent->GetShadowRoot();
if (!shadowRoot) {
continue;
}
nsXBLBinding* binding = shadowRoot->GetAssociatedBinding();
if (!binding) {
continue;
}
aData->mTreeMatchContext.mScopedRoot = boundContent;
binding->WalkRules(aFunc, aData);
}
aData->mTreeMatchContext.mScopedRoot = oldScopedRoot;
aData->mTreeMatchContext.mOnlyMatchHostPseudo = oldOnlyMatchHostPseudo;
}
nsresult
nsBindingManager::MediumFeaturesChanged(nsPresContext* aPresContext,