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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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6
dom/base/nsDOMWindowUtils.cpp
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@ -3657,11 +3657,11 @@ nsDOMWindowUtils::GetOMTAStyle(nsIDOMElement* aElement,
RefPtr<nsROCSSPrimitiveValue> cssValue = nullptr;
nsIFrame* frame = element->GetPrimaryFrame();
if (frame && !aPseudoElement.IsEmpty()) {
if (!aPseudoElement.IsEmpty()) {
if (aPseudoElement.EqualsLiteral("::before")) {
frame = nsLayoutUtils::GetBeforeFrame(frame);
frame = nsLayoutUtils::GetBeforeFrame(element);
} else if (aPseudoElement.EqualsLiteral("::after")) {
frame = nsLayoutUtils::GetAfterFrame(frame);
frame = nsLayoutUtils::GetAfterFrame(element);
} else {
return NS_ERROR_INVALID_ARG;
}