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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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28
layout/style/nsStyleStruct.cpp
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@ -1629,28 +1629,11 @@ nsStylePosition::CalcDifference(const nsStylePosition& aNewData,
if (aOldStyleVisibility) {
bool isVertical = WritingMode(aOldStyleVisibility).IsVertical();
if (isVertical ? widthChanged : heightChanged) {
// Block-size changes can affect descendant intrinsic sizes due to
// replaced elements with percentage bsizes in descendants which
// also have percentage bsizes. This is handled via
// nsChangeHint_UpdateComputedBSize which clears intrinsic sizes
// for frames that have such replaced elements.
//
// We need to use nsChangeHint_ClearAncestorIntrinsics for
// block-size changes so we clear results of cached CSS Flex
// measuring reflows.
hint |= nsChangeHint_NeedReflow |
nsChangeHint_UpdateComputedBSize |
nsChangeHint_ReflowChangesSizeOrPosition |
nsChangeHint_ClearAncestorIntrinsics;
hint |= nsChangeHint_ReflowHintsForBSizeChange;
}
if (isVertical ? heightChanged : widthChanged) {
// None of our inline-size differences can affect descendant
// intrinsic sizes and none of them need to force children to
// reflow.
hint |= nsChangeHint_AllReflowHints &
~(nsChangeHint_ClearDescendantIntrinsics |
nsChangeHint_NeedDirtyReflow);
hint |= nsChangeHint_ReflowHintsForISizeChange;
}
} else {
if (widthChanged || heightChanged) {
@ -3263,8 +3246,6 @@ nsStyleDisplay::CalcDifference(const nsStyleDisplay& aNewData) const
|| mDisplay != aNewData.mDisplay
|| mContain != aNewData.mContain
|| (mFloat == StyleFloat::None) != (aNewData.mFloat == StyleFloat::None)
|| mOverflowX != aNewData.mOverflowX
|| mOverflowY != aNewData.mOverflowY
|| mScrollBehavior != aNewData.mScrollBehavior
|| mScrollSnapTypeX != aNewData.mScrollSnapTypeX
|| mScrollSnapTypeY != aNewData.mScrollSnapTypeY
@ -3276,6 +3257,11 @@ nsStyleDisplay::CalcDifference(const nsStyleDisplay& aNewData) const
hint |= nsChangeHint_ReconstructFrame;
}
if (mOverflowX != aNewData.mOverflowX
|| mOverflowY != aNewData.mOverflowY) {
hint |= nsChangeHint_CSSOverflowChange;
}
/* Note: When mScrollBehavior, mScrollSnapTypeX, mScrollSnapTypeY,
* mScrollSnapPointsX, mScrollSnapPointsY, or mScrollSnapDestination are
* changed, nsChangeHint_NeutralChange is not sufficient to enter