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Issue #1355 - Avoid unnecessary work in nsIFrame::BuildDisplayListForStackingContext() and nsIFrame::BuildDisplayListForChild() and Cleanup DescendIntoChild

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Bug 1441796 - Part 1: Optimize the (pseudo)-stacking context conditions

Bug 1441796 - Part 3: Reuse the results in nsIFrame::BuildDisplayListForStackingContext() for ChildrenHavePerspective(), IsTransformed(), and Combines3DTransformWithAncestors()

Bug 1512244 - Part 1: Cleanup DescendIntoChild
This commit is contained in:
win7-7 2020-05-08 00:52:23 +03:00 • committed by Roy Tam
commit da0e3a828b
3 changed files with 80 additions and 57 deletions
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23
layout/base/nsDisplayList.cpp
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@ -1009,8 +1009,22 @@ nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame,
}
state->mInsidePointerEventsNoneDoc = pointerEventsNone;
if (!buildCaret)
state->mPresShellIgnoreScrollFrame =
state->mPresShell->IgnoringViewportScrolling()
? state->mPresShell->GetRootScrollFrame()
: nullptr;
nsPresContext* pc = aReferenceFrame->PresContext();
nsCOMPtr<nsIDocShell> docShell = pc->GetDocShell();
if (docShell) {
docShell->GetWindowDraggingAllowed(&mWindowDraggingAllowed);
}
mIsInChromePresContext = pc->IsChrome();
if (!buildCaret) {
return;
}
RefPtr<nsCaret> caret = state->mPresShell->GetCaret();
state->mCaretFrame = caret->GetPaintGeometry(&state->mCaretRect);
@ -1018,13 +1032,6 @@ nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame,
mFramesMarkedForDisplay.AppendElement(state->mCaretFrame);
MarkFrameForDisplay(state->mCaretFrame, nullptr);
}
nsPresContext* pc = aReferenceFrame->PresContext();
nsCOMPtr<nsIDocShell> docShell = pc->GetDocShell();
if (docShell) {
docShell->GetWindowDraggingAllowed(&mWindowDraggingAllowed);
}
mIsInChromePresContext = pc->IsChrome();
}
// A non-blank paint is a paint that does not just contain the canvas background.