зеркало из https://github.com/mozilla/gecko-dev.git
40 строки
1.2 KiB
C++
40 строки
1.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsTransactionStack_h__
|
|
#define nsTransactionStack_h__
|
|
|
|
#include "nsDeque.h"
|
|
|
|
class nsCycleCollectionTraversalCallback;
|
|
class nsTransactionItem;
|
|
|
|
class nsTransactionStack : private nsDeque
|
|
{
|
|
public:
|
|
enum Type { FOR_UNDO, FOR_REDO };
|
|
|
|
explicit nsTransactionStack(Type aType);
|
|
~nsTransactionStack();
|
|
|
|
void Push(nsTransactionItem *aTransactionItem);
|
|
void Push(already_AddRefed<nsTransactionItem> aTransactionItem);
|
|
already_AddRefed<nsTransactionItem> Pop();
|
|
already_AddRefed<nsTransactionItem> PopBottom();
|
|
already_AddRefed<nsTransactionItem> Peek();
|
|
already_AddRefed<nsTransactionItem> GetItem(int32_t aIndex);
|
|
void Clear();
|
|
int32_t GetSize() const { return static_cast<int32_t>(nsDeque::GetSize()); }
|
|
bool IsEmpty() const { return GetSize() == 0; }
|
|
|
|
void DoUnlink() { Clear(); }
|
|
void DoTraverse(nsCycleCollectionTraversalCallback &cb);
|
|
|
|
private:
|
|
const Type mType;
|
|
};
|
|
|
|
#endif // nsTransactionStack_h__
|