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Bug 539356 - Part 18 - Mark frames with only invalid children as an optimization to use when invalidating further frames. r=roc

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This commit is contained in:
Matt Woodrow 2012-06-30 15:06:12 +12:00
parent c3fc0ac3a2
commit 8a56e2fe85
2 changed files with 23 additions and 2 deletions
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17
layout/generic/nsFrame.cpp
View File

@ -4597,6 +4597,12 @@ void
nsIFrame::InvalidateFrameSubtree(PRUint32 aFlags)
{
InvalidateFrame(aFlags);
if (HasAnyStateBits(NS_FRAME_ALL_DESCENDANTS_NEED_PAINT)) {
return;
}
AddStateBits(NS_FRAME_ALL_DESCENDANTS_NEED_PAINT);
nsAutoTArray<nsIFrame::ChildList,4> childListArray;
GetCrossDocChildLists(&childListArray);
@ -4627,7 +4633,9 @@ nsIFrame::ClearInvalidationStateBits()
}
}
RemoveStateBits(NS_FRAME_NEEDS_PAINT | NS_FRAME_DESCENDANT_NEEDS_PAINT);
RemoveStateBits(NS_FRAME_NEEDS_PAINT |
NS_FRAME_DESCENDANT_NEEDS_PAINT |
NS_FRAME_ALL_DESCENDANTS_NEED_PAINT);
}
void
@ -7784,6 +7792,13 @@ nsFrame::SetParent(nsIFrame* aParent)
} else {
RemoveInPopupStateBitFromDescendants(this);
}
// If our new parent only has invalid children, then we just invalidate
// ourselves too. This is probably faster than clearing the flag all
// the way up the frame tree.
if (aParent->HasAnyStateBits(NS_FRAME_ALL_DESCENDANTS_NEED_PAINT)) {
InvalidateFrame(INVALIDATE_DONT_SCHEDULE_PAINT);
}
}
void

8
layout/generic/nsIFrame.h
View File

@ -286,8 +286,14 @@ typedef PRUint64 nsFrameState;
// cross-doc children.
#define NS_FRAME_DESCENDANT_NEEDS_PAINT NS_FRAME_STATE_BIT(46)
// Frame has only descendant frames that needs painting - This includes
// cross-doc children. This guarantees that all descendents have
// NS_FRAME_NEEDS_PAINT and NS_FRAME_ALL_DESCENDANTS_NEED_PAINT, or they
// have no display items.
#define NS_FRAME_ALL_DESCENDANTS_NEED_PAINT NS_FRAME_STATE_BIT(47)
// Frame is a descendant of a popup
#define NS_FRAME_IN_POPUP NS_FRAME_STATE_BIT(47)
#define NS_FRAME_IN_POPUP NS_FRAME_STATE_BIT(48)
// Box layout bits
#define NS_STATE_IS_HORIZONTAL NS_FRAME_STATE_BIT(22)