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moebius#138: Optimize operations on root of deeply-nested frame tree

Browse source 
https://github.com/MoonchildProductions/moebius/pull/138
This commit is contained in:
janekptacijarabaci 2018-04-24 21:39:13 +02:00 • committed by Roy Tam
commit 85692a1198
23 changed files with 651 additions and 40 deletions
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9
layout/base/nsPresContext.cpp
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@ -208,6 +208,7 @@ nsPresContext::nsPresContext(nsIDocument* aDocument, nsPresContextType aType)
mTextZoom(1.0), mFullZoom(1.0), mOverrideDPPX(0.0),
mLastFontInflationScreenSize(gfxSize(-1.0, -1.0)),
mPageSize(-1, -1), mPPScale(1.0f),
mViewportScrollbarOverrideNode(nullptr),
mViewportStyleScrollbar(NS_STYLE_OVERFLOW_AUTO, NS_STYLE_OVERFLOW_AUTO),
mImageAnimationModePref(imgIContainer::kNormalAnimMode),
mAllInvalidated(false),
@ -1423,10 +1424,10 @@ nsPresContext::UpdateViewportScrollbarStylesOverride()
// Start off with our default styles, and then update them as needed.
mViewportStyleScrollbar = ScrollbarStyles(NS_STYLE_OVERFLOW_AUTO,
NS_STYLE_OVERFLOW_AUTO);
nsIContent* propagatedFrom = nullptr;
mViewportScrollbarOverrideNode = nullptr;
// Don't propagate the scrollbar state in printing or print preview.
if (!IsPaginated()) {
propagatedFrom =
mViewportScrollbarOverrideNode =
GetPropagatedScrollbarStylesForViewport(this, &mViewportStyleScrollbar);
}
@ -1438,13 +1439,13 @@ nsPresContext::UpdateViewportScrollbarStylesOverride()
// the styles are from, so that the state of those elements is not
// affected across fullscreen change.
if (fullscreenElement != document->GetRootElement() &&
fullscreenElement != propagatedFrom) {
fullscreenElement != mViewportScrollbarOverrideNode) {
mViewportStyleScrollbar = ScrollbarStyles(NS_STYLE_OVERFLOW_HIDDEN,
NS_STYLE_OVERFLOW_HIDDEN);
}
}
return propagatedFrom;
return mViewportScrollbarOverrideNode;
}
bool