mozilla::ipc::IPCResult
DocAccessibleParent::RecvShowEvent(const ShowEventData& aData,
const bool& aFromUser)
{
if (mShutdown)
return IPC_OK();
MOZ_ASSERT(CheckDocTree());
if (aData.NewTree().IsEmpty()) {
NS_ERROR("no children being added");
return IPC_FAIL_NO_REASON(this);
}
ProxyAccessible* parent = GetAccessible(aData.ID());
// XXX This should really never happen, but sometimes we fail to fire the
// required show events.
if (!parent) {
NS_ERROR("adding child to unknown accessible");
#ifdef DEBUG
return IPC_FAIL(this, "unknown parent accessible");
#else
return IPC_OK();
#endif
}
uint32_t newChildIdx = aData.Idx();
if (newChildIdx > parent->ChildrenCount()) {
NS_ERROR("invalid index to add child at");
#ifdef DEBUG
return IPC_FAIL(this, "invalid index");
#else
return IPC_OK();
#endif
}
uint32_t consumed = AddSubtree(parent, aData.NewTree(), 0, newChildIdx);
MOZ_ASSERT(consumed == aData.NewTree().Length());
// XXX This shouldn't happen, but if we failed to add children then the below
// is pointless and can crash.
if (!consumed) {
return IPC_FAIL(this, "failed to add children");
}
#ifdef DEBUG
for (uint32_t i = 0; i < consumed; i++) {
uint64_t id = aData.NewTree()[i].ID();
MOZ_ASSERT(mAccessibles.GetEntry(id));
}
#endif
MOZ_ASSERT(CheckDocTree());
ProxyAccessible* target = parent->ChildAt(newChildIdx);
ProxyShowHideEvent(target, parent, true, aFromUser);
if (!nsCoreUtils::AccEventObserversExist()) {
return IPC_OK();
}
uint32_t type = nsIAccessibleEvent::EVENT_SHOW;
xpcAccessibleGeneric* xpcAcc = GetXPCAccessible(target);
xpcAccessibleDocument* doc = GetAccService()->GetXPCDocument(this);
nsIDOMNode* node = nullptr;
RefPtr<xpcAccEvent> event = new xpcAccEvent(type, xpcAcc, doc, node,
aFromUser);
nsCoreUtils::DispatchAccEvent(Move(event));
return IPC_OK();
}
