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Set AncestorHasDirAuto on descendants of a node being bound to an element with HasDirAuto or AncestorHasDirAuto. Bug 827190, r=ehsan

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This commit is contained in:
Simon Montagu 2013-01-13 08:08:58 -08:00
parent ae5048a875
commit 32d311ff83
1 changed files with 20 additions and 4 deletions
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24
content/base/src/DirectionalityUtils.cpp
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@ -904,10 +904,26 @@ SetDirOnBind(mozilla::dom::Element* aElement, nsIContent* aParent)
aParent && aParent->NodeOrAncestorHasDirAuto()) {
aElement->SetAncestorHasDirAuto();
// if we are binding an element to the tree that already has descendants,
// and the parent has NodeHasDirAuto or NodeAncestorHasDirAuto, we may
// need to reset the direction of an ancestor with dir=auto
if (aElement->GetFirstChild()) {
nsIContent* child = aElement->GetFirstChild();
if (child) {
// If we are binding an element to the tree that already has descendants,
// and the parent has NodeHasDirAuto or NodeAncestorHasDirAuto, we need
// to set NodeAncestorHasDirAuto on all the element's descendants, except
// for nodes that don't affect the direction of their ancestors.
do {
if (child->IsElement() &&
(DoesNotParticipateInAutoDirection(child->AsElement()) ||
child->NodeInfo()->Equals(nsGkAtoms::bdi) ||
child->HasFixedDir())) {
child = child->GetNextNonChildNode(aElement);
continue;
}
child->SetAncestorHasDirAuto();
child = child->GetNextNode(aElement);
} while (child);
// We may also need to reset the direction of an ancestor with dir=auto
WalkAncestorsResetAutoDirection(aElement, true);
}
}