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Bug 1220020. When we turn something into an animated geometry root, clear the cache of animated geometry roots so it's not stale. r=tnikkel

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This commit is contained in:
Kartikaya Gupta 2015-10-05 17:13:02 -04:00
parent da523f7bb7
commit 9f4c17d08a
1 changed files with 6 additions and 0 deletions
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6
layout/base/nsDisplayList.cpp
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@ -1123,6 +1123,12 @@ nsDisplayListBuilder::FindAnimatedGeometryRootFor(nsIFrame* aFrame, const nsIFra
void
nsDisplayListBuilder::RecomputeCurrentAnimatedGeometryRoot()
{
// technically we only need to clear any part of the cache that relies on
// the AGR of mCurrentFrame (i.e. all entries in mAnimatedGeometryRootCache
// where the key frame is a descendant of mCurrentFrame) but doing that is
// complicated so we just clear the whole thing.
mAnimatedGeometryRootCache.Clear();
mCurrentAnimatedGeometryRoot = ComputeAnimatedGeometryRootFor(this, const_cast<nsIFrame *>(mCurrentFrame));
AnimatedGeometryRootLookup lookup(mCurrentFrame, nullptr);
mAnimatedGeometryRootCache.Put(lookup, mCurrentAnimatedGeometryRoot);