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Bug 812893 - When inserting a frame into the [Excess]OverflowContinuations list, also move its continuations there if they are in the same parent. r=roc

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This commit is contained in:
Mats Palmgren 2013-01-25 00:12:48 +01:00
parent 1d750124e7
commit dd097c3d3f
1 changed files with 13 additions and 9 deletions
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22
layout/generic/nsContainerFrame.cpp
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@ -1644,10 +1644,10 @@ nsOverflowContinuationTracker::Insert(nsIFrame* aOverflowCont,
NS_PRECONDITION(aOverflowCont->GetPrevInFlow(),
"overflow containers must have a prev-in-flow");
nsresult rv = NS_OK;
bool convertedToOverflowContainer = false;
bool reparented = false;
nsPresContext* presContext = aOverflowCont->PresContext();
if (!mSentry || aOverflowCont != mSentry->GetNextInFlow()) {
// Not in our list, so we need to add it
const bool addToList = !mSentry || aOverflowCont != mSentry->GetNextInFlow();
if (addToList) {
if (aOverflowCont->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
// aOverflowCont is in some other overflow container list,
// steal it first
@ -1660,7 +1660,6 @@ nsOverflowContinuationTracker::Insert(nsIFrame* aOverflowCont,
}
else {
aOverflowCont->AddStateBits(NS_FRAME_IS_OVERFLOW_CONTAINER);
convertedToOverflowContainer = true;
}
if (!mOverflowContList) {
mOverflowContList = new nsFrameList();
@ -1673,6 +1672,7 @@ nsOverflowContinuationTracker::Insert(nsIFrame* aOverflowCont,
nsContainerFrame::ReparentFrameView(presContext, aOverflowCont,
aOverflowCont->GetParent(),
mParent);
reparented = true;
}
mOverflowContList->InsertFrame(mParent, mPrevOverflowCont, aOverflowCont);
aReflowStatus |= NS_FRAME_REFLOW_NEXTINFLOW;
@ -1690,16 +1690,20 @@ nsOverflowContinuationTracker::Insert(nsIFrame* aOverflowCont,
(aOverflowCont->GetStateBits() & NS_FRAME_OUT_OF_FLOW)),
"OverflowContTracker in unexpected state");
if (convertedToOverflowContainer) {
if (addToList) {
// Convert all non-overflow-container continuations of aOverflowCont
// into overflow containers and move them to our overflow
// tracker. This preserves the invariant that the next-continuations
// of an overflow container are also overflow containers.
nsIFrame* f = aOverflowCont->GetNextContinuation();
if (f && !(f->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
nsContainerFrame* parent = static_cast<nsContainerFrame*>(f->GetParent());
rv = parent->StealFrame(presContext, f);
NS_ENSURE_SUCCESS(rv, rv);
if (f && (!(f->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) ||
(!reparented && f->GetParent() == mParent) ||
(reparented && f->GetParent() != mParent))) {
if (!(f->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
nsContainerFrame* parent = static_cast<nsContainerFrame*>(f->GetParent());
rv = parent->StealFrame(presContext, f);
NS_ENSURE_SUCCESS(rv, rv);
}
Insert(f, aReflowStatus);
}
}