static void
FindBodyContent(nsIContent* aParent, nsIContent** aResult)
{
if (aParent->Tag() == nsGkAtoms::listboxbody) {
*aResult = aParent;
NS_IF_ADDREF(*aResult);
}
else {
nsCOMPtr<nsIDOMNodeList> kids;
aParent->OwnerDoc()->BindingManager()->GetXBLChildNodesFor(aParent, getter_AddRefs(kids));
if (!kids) return;
uint32_t i;
kids->GetLength(&i);
// start from the end, cuz we're smart and we know the listboxbody is probably at the end
while (i > 0) {
nsCOMPtr<nsIDOMNode> childNode;
kids->Item(--i, getter_AddRefs(childNode));
nsCOMPtr<nsIContent> childContent(do_QueryInterface(childNode));
FindBodyContent(childContent, aResult);
if (*aResult)
break;
}
}
}
nsListBoxBodyFrame*
ListBoxObject::GetListBoxBody(bool aFlush)
{
if (mListBoxBody) {
return mListBoxBody;
}
nsIPresShell* shell = GetPresShell(false);
if (!shell) {
return nullptr;
}
nsIFrame* frame = aFlush ?
GetFrame(false) /* does Flush_Frames */ :
mContent->GetPrimaryFrame();
if (!frame) {
return nullptr;
}
// Iterate over our content model children looking for the body.
nsCOMPtr<nsIContent> content = FindBodyContent(frame->GetContent());
if (!content) {
return nullptr;
}
// this frame will be a nsGFXScrollFrame
frame = content->GetPrimaryFrame();
if (!frame) {
return nullptr;
}
nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
if (!scrollFrame) {
return nullptr;
}
// this frame will be the one we want
nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
if (!yeahBaby) {
return nullptr;
}
// It's a frame. Refcounts are irrelevant.
nsListBoxBodyFrame* listBoxBody = do_QueryFrame(yeahBaby);
NS_ENSURE_TRUE(listBoxBody &&
listBoxBody->SetBoxObject(this),
nullptr);
mListBoxBody = listBoxBody;
return mListBoxBody;
}
static nsIContent*
FindBodyContent(nsIContent* aParent)
{
if (aParent->IsXULElement(nsGkAtoms::listboxbody)) {
return aParent;
}
mozilla::dom::FlattenedChildIterator iter(aParent);
for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
nsIContent* result = FindBodyContent(child);
if (result) {
return result;
}
}
return nullptr;
}
nsListBoxBodyFrame*
nsListBoxObject::GetListBoxBody(PRBool aFlush)
{
if (mListBoxBody) {
return mListBoxBody;
}
nsIPresShell* shell = GetPresShell(PR_FALSE);
if (!shell) {
return nsnull;
}
nsIFrame* frame = aFlush ?
GetFrame(PR_FALSE) /* does Flush_Frames */ :
shell->GetPrimaryFrameFor(mContent);
if (!frame)
return nsnull;
// Iterate over our content model children looking for the body.
nsCOMPtr<nsIContent> content;
FindBodyContent(frame->GetContent(), getter_AddRefs(content));
// this frame will be a nsGFXScrollFrame
frame = shell->GetPrimaryFrameFor(content);
if (!frame)
return nsnull;
nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
if (!scrollFrame)
return nsnull;
// this frame will be the one we want
nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
if (!yeahBaby)
return nsnull;
// It's a frame. Refcounts are irrelevant.
nsListBoxBodyFrame* listBoxBody = do_QueryFrame(yeahBaby);
NS_ENSURE_TRUE(listBoxBody &&
listBoxBody->SetBoxObject(this),
nsnull);
mListBoxBody = listBoxBody;
return mListBoxBody;
}