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7dbe315e25
Its return value is never used, and most implementations return nullptr anyway. MozReview-Commit-ID: 8rxC053mmE8 --HG-- extra : rebase_source : 61a0b8b1373396182efd27d3c01b96e5e5541364
109 lines
2.6 KiB
C++
109 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsCOMPtr.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupportsUtils.h"
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#include "nsTransactionItem.h"
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#include "nsTransactionStack.h"
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#include "nscore.h"
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class nsTransactionStackDeallocator : public nsDequeFunctor {
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virtual void operator()(void* aObject)
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{
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RefPtr<nsTransactionItem> releaseMe = dont_AddRef(static_cast<nsTransactionItem*>(aObject));
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}
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};
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nsTransactionStack::nsTransactionStack(Type aType)
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: nsDeque(new nsTransactionStackDeallocator())
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, mType(aType)
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{
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}
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nsTransactionStack::~nsTransactionStack()
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{
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Clear();
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}
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void
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nsTransactionStack::Push(nsTransactionItem* aTransactionItem)
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{
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if (!aTransactionItem) {
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return;
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}
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RefPtr<nsTransactionItem> item(aTransactionItem);
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Push(item.forget());
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}
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void
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nsTransactionStack::Push(already_AddRefed<nsTransactionItem> aTransactionItem)
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{
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RefPtr<nsTransactionItem> item(aTransactionItem);
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if (!item) {
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return;
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}
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nsDeque::Push(item.forget().take());
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}
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already_AddRefed<nsTransactionItem>
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nsTransactionStack::Pop()
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{
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RefPtr<nsTransactionItem> item =
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dont_AddRef(static_cast<nsTransactionItem*>(nsDeque::Pop()));
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return item.forget();
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}
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already_AddRefed<nsTransactionItem>
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nsTransactionStack::PopBottom()
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{
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RefPtr<nsTransactionItem> item =
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dont_AddRef(static_cast<nsTransactionItem*>(nsDeque::PopFront()));
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return item.forget();
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}
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already_AddRefed<nsTransactionItem>
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nsTransactionStack::Peek()
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{
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RefPtr<nsTransactionItem> item =
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static_cast<nsTransactionItem*>(nsDeque::Peek());
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return item.forget();
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}
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already_AddRefed<nsTransactionItem>
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nsTransactionStack::GetItem(int32_t aIndex)
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{
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if (aIndex < 0 || aIndex >= static_cast<int32_t>(nsDeque::GetSize())) {
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return nullptr;
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}
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RefPtr<nsTransactionItem> item =
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static_cast<nsTransactionItem*>(nsDeque::ObjectAt(aIndex));
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return item.forget();
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}
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void
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nsTransactionStack::Clear()
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{
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while (GetSize() != 0) {
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RefPtr<nsTransactionItem> item =
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mType == FOR_UNDO ? Pop() : PopBottom();
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}
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}
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void
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nsTransactionStack::DoTraverse(nsCycleCollectionTraversalCallback &cb)
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{
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int32_t size = GetSize();
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for (int32_t i = 0; i < size; ++i) {
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nsTransactionItem* item = static_cast<nsTransactionItem*>(nsDeque::ObjectAt(i));
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if (item) {
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NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "transaction stack mDeque[i]");
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cb.NoteNativeChild(item, NS_CYCLE_COLLECTION_PARTICIPANT(nsTransactionItem));
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}
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}
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}
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