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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
parent d0e748cada
commit eae8d21428
23 changed files with 651 additions and 40 deletions
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layout/base/nsCSSFrameConstructor.cpp
+11 -4
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@@ -8246,11 +8246,19 @@ nsCSSFrameConstructor::ContentRemoved(nsIContent* aContainer,
*aDestroyedFramesFor = aChild;
}
nsPresContext* presContext = mPresShell->GetPresContext();
MOZ_ASSERT(presContext, "Our presShell should have a valid presContext");
if (aChild->IsHTMLElement(nsGkAtoms::body) ||
(!aContainer && aChild->IsElement())) {
// This might be the element we propagated viewport scrollbar
// styles from. Recompute those.
mPresShell->GetPresContext()->UpdateViewportScrollbarStylesOverride();
// We might be removing the element that we propagated viewport scrollbar
// styles from. Recompute those. (This clause covers two of the three
// possible scrollbar-propagation sources: the <body> [as aChild or a
// descendant] and the root node. The other possible scrollbar-propagation
// source is a fullscreen element, and we have code elsewhere to update
// scrollbars after fullscreen elements are removed -- specifically, it's
// part of the fullscreen cleanup code called by Element::UnbindFromTree.)
presContext->UpdateViewportScrollbarStylesOverride();
}
// XXXldb Do we need to re-resolve style to handle the CSS2 + combinator and
@@ -8316,7 +8324,6 @@ nsCSSFrameConstructor::ContentRemoved(nsIContent* aContainer,
ClearDisplayContentsIn(aChild, aContainer);
}
nsPresContext* presContext = mPresShell->GetPresContext();
#ifdef MOZ_XUL
if (NotifyListBoxBody(presContext, aContainer, aChild, aOldNextSibling,
childFrame, CONTENT_REMOVED)) {