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Bug 1355351 - Make pseudo-elements return the correct style via getComputedStyle

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* Add a node property to access the ::before and ::after pseudo-elements
* Look for the frame for ::before and ::after pseudos
* Clean up pseudo-element props
* Simplify nsLayoutUtils callers, and make child iterators notice display: contents pseudos

Tag #1375
This commit is contained in:
Matt A. Tobin 2020-04-17 05:10:25 -04:00 • committed by Roy Tam
commit d3ffda520f
16 changed files with 188 additions and 241 deletions
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22
dom/animation/EffectCompositor.cpp
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@ -356,24 +356,16 @@ EffectCompositor::GetElementToRestyle(dom::Element* aElement,
return aElement;
}
nsIFrame* primaryFrame = aElement->GetPrimaryFrame();
if (!primaryFrame) {
return nullptr;
}
nsIFrame* pseudoFrame;
if (aPseudoType == CSSPseudoElementType::before) {
pseudoFrame = nsLayoutUtils::GetBeforeFrame(primaryFrame);
} else if (aPseudoType == CSSPseudoElementType::after) {
pseudoFrame = nsLayoutUtils::GetAfterFrame(primaryFrame);
} else {
NS_NOTREACHED("Should not try to get the element to restyle for a pseudo "
"other that :before or :after");
return nullptr;
return nsLayoutUtils::GetBeforePseudo(aElement);
}
if (!pseudoFrame) {
return nullptr;
if (aPseudoType == CSSPseudoElementType::after) {
return nsLayoutUtils::GetAfterPseudo(aElement);
}
return pseudoFrame->GetContent()->AsElement();
NS_NOTREACHED("Should not try to get the element to restyle for a pseudo "
"other that :before or :after");
return nullptr;
}
bool