void
DisplayListClipState::TurnClipIntoScrollClipForContainingBlockDescendants(
nsDisplayListBuilder* aBuilder, nsIScrollableFrame* aScrollableFrame)
{
const DisplayItemScrollClip* parent = GetCurrentInnermostScrollClip();
mScrollClipContainingBlockDescendants =
aBuilder->AllocateDisplayItemScrollClip(parent,
aScrollableFrame,
GetCurrentCombinedClip(aBuilder), true);
Clear();
}
void
DisplayListClipState::TurnClipIntoScrollClipForContentDescendants(
nsDisplayListBuilder* aBuilder, nsIScrollableFrame* aScrollableFrame)
{
const DisplayItemScrollClip* parent = GetCurrentInnermostScrollClip();
const DisplayItemScrollClip* crossStackingContextParent = parent;
if (!crossStackingContextParent) {
crossStackingContextParent = mCrossStackingContextParentScrollClip;
}
mScrollClipContentDescendants =
aBuilder->AllocateDisplayItemScrollClip(parent, crossStackingContextParent,
aScrollableFrame,
GetCurrentCombinedClip(aBuilder), true);
Clear();
}
DisplayItemScrollClip*
DisplayListClipState::CreateInactiveScrollClip(
nsDisplayListBuilder* aBuilder, nsIScrollableFrame* aScrollableFrame)
{
// We ignore the rounded corners on the current clip because we don't want
// them to be double-applied (as scroll clip and as regular clip).
// Double-applying rectangle clips doesn't make a visual difference so it's
// fine.
const DisplayItemClip* rectClip =
WithoutRoundedCorners(aBuilder, GetCurrentCombinedClip(aBuilder));
const DisplayItemScrollClip* parent = GetCurrentInnermostScrollClip();
DisplayItemScrollClip* scrollClip =
aBuilder->AllocateDisplayItemScrollClip(parent,
aScrollableFrame,
rectClip, false);
return scrollClip;
}