17     : mTransaction(aTransaction), mUndoStack(0), mRedoStack(0)  in nsTransactionItem()
24   delete mUndoStack;  in ~nsTransactionItem()
35   if (mUndoStack) {  in CleanUp()
36     mUndoStack->DoUnlink();  in CleanUp()
56   if (tmp->mUndoStack) {
57     tmp->mUndoStack->DoTraverse(cb);
69   if (!mUndoStack) {  in NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE()
70     mUndoStack = new nsTransactionStack(nsTransactionStack::FOR_UNDO);  in NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE()
73   mUndoStack->Push(aTransactionItem);  in NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE()
133     NS_ENSURE_TRUE(mUndoStack, NS_ERROR_FAILURE);  in GetChild()
135     RefPtr<nsTransactionItem> child = mUndoStack->GetItem(aIndex);  in GetChild()
186   if (mUndoStack) {  in UndoChildren()
187     if (!mRedoStack && mUndoStack) {  in UndoChildren()
192     int32_t sz = mUndoStack->GetSize();  in UndoChildren()
196       RefPtr<nsTransactionItem> item = mUndoStack->Peek();  in UndoChildren()
213         item = mUndoStack->Pop();  in UndoChildren()
279       mUndoStack->Push(item.forget());  in RedoChildren()
299   if (!mUndoStack) {  in GetNumberOfUndoItems()
304   *aNumItems = mUndoStack->GetSize();  in GetNumberOfUndoItems()