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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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13
layout/base/ServoRestyleManager.cpp
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@ -277,24 +277,17 @@ ServoRestyleManager::FrameForPseudoElement(const nsIContent* aContent,
nsIAtom* aPseudoTagOrNull)
{
MOZ_ASSERT_IF(aPseudoTagOrNull, aContent->IsElement());
nsIFrame* primaryFrame = aContent->GetPrimaryFrame();
if (!aPseudoTagOrNull) {
return primaryFrame;
return aContent->GetPrimaryFrame();
}
if (!primaryFrame) {
return nullptr;
}
// NOTE: we probably need to special-case display: contents here. Gecko's
// RestyleManager passes the primary frame of the parent instead.
if (aPseudoTagOrNull == nsCSSPseudoElements::before) {
return nsLayoutUtils::GetBeforeFrameForContent(primaryFrame, aContent);
return nsLayoutUtils::GetBeforeFrame(aContent);
}
if (aPseudoTagOrNull == nsCSSPseudoElements::after) {
return nsLayoutUtils::GetAfterFrameForContent(primaryFrame, aContent);
return nsLayoutUtils::GetAfterFrame(aContent);
}
MOZ_CRASH("Unkown pseudo-element given to "