зеркало из https://github.com/mozilla/gecko-dev.git
125 строки
3.8 KiB
C++
125 строки
3.8 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 mozilla_TransactionManager_h
|
|
#define mozilla_TransactionManager_h
|
|
|
|
#include "mozilla/TransactionStack.h"
|
|
|
|
#include "nsCOMArray.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "nsISupportsImpl.h"
|
|
#include "nsITransactionManager.h"
|
|
#include "nsWeakReference.h"
|
|
#include "nscore.h"
|
|
|
|
class nsITransaction;
|
|
class nsITransactionListener;
|
|
|
|
namespace mozilla {
|
|
|
|
class TransactionManager final : public nsITransactionManager
|
|
, public nsSupportsWeakReference
|
|
{
|
|
public:
|
|
explicit TransactionManager(int32_t aMaxTransactionCount = -1);
|
|
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(TransactionManager,
|
|
nsITransactionManager)
|
|
|
|
NS_DECL_NSITRANSACTIONMANAGER
|
|
|
|
already_AddRefed<nsITransaction> PeekUndoStack();
|
|
already_AddRefed<nsITransaction> PeekRedoStack();
|
|
|
|
nsresult Undo();
|
|
nsresult Redo();
|
|
|
|
size_t NumberOfUndoItems() const
|
|
{
|
|
return mUndoStack.GetSize();
|
|
}
|
|
size_t NumberOfRedoItems() const
|
|
{
|
|
return mRedoStack.GetSize();
|
|
}
|
|
|
|
int32_t NumberOfMaximumTransactions() const { return mMaxTransactionCount; }
|
|
|
|
bool EnableUndoRedo(int32_t aMaxTransactionCount = -1);
|
|
bool DisableUndoRedo()
|
|
{
|
|
return EnableUndoRedo(0);
|
|
}
|
|
bool ClearUndoRedo()
|
|
{
|
|
if (NS_WARN_IF(!mDoStack.IsEmpty())) {
|
|
return false;
|
|
}
|
|
mUndoStack.Clear();
|
|
mRedoStack.Clear();
|
|
return true;
|
|
}
|
|
|
|
bool AddTransactionListener(nsITransactionListener& aListener)
|
|
{
|
|
// XXX Shouldn't we check if aListener has already been in mListeners?
|
|
return mListeners.AppendObject(&aListener);
|
|
}
|
|
bool RemoveTransactionListener(nsITransactionListener& aListener)
|
|
{
|
|
return mListeners.RemoveObject(&aListener);
|
|
}
|
|
|
|
nsresult WillDoNotify(nsITransaction* aTransaction, bool* aInterrupt);
|
|
nsresult DidDoNotify(nsITransaction* aTransaction, nsresult aExecuteResult);
|
|
nsresult WillUndoNotify(nsITransaction* aTransaction, bool* aInterrupt);
|
|
nsresult DidUndoNotify(nsITransaction* aTransaction, nsresult aUndoResult);
|
|
nsresult WillRedoNotify(nsITransaction* aTransaction, bool *aInterrupt);
|
|
nsresult DidRedoNotify(nsITransaction* aTransaction, nsresult aRedoResult);
|
|
nsresult WillBeginBatchNotify(bool* aInterrupt);
|
|
nsresult DidBeginBatchNotify(nsresult aResult);
|
|
nsresult WillEndBatchNotify(bool* aInterrupt);
|
|
nsresult DidEndBatchNotify(nsresult aResult);
|
|
nsresult WillMergeNotify(nsITransaction* aTop,
|
|
nsITransaction* aTransaction,
|
|
bool* aInterrupt);
|
|
nsresult DidMergeNotify(nsITransaction* aTop,
|
|
nsITransaction* aTransaction,
|
|
bool aDidMerge,
|
|
nsresult aMergeResult);
|
|
|
|
/**
|
|
* Exposing non-virtual methods of nsITransactionManager methods.
|
|
*/
|
|
nsresult BeginBatchInternal(nsISupports* aData);
|
|
nsresult EndBatchInternal(bool aAllowEmpty);
|
|
|
|
private:
|
|
virtual ~TransactionManager() = default;
|
|
|
|
nsresult BeginTransaction(nsITransaction* aTransaction,
|
|
nsISupports* aData);
|
|
nsresult EndTransaction(bool aAllowEmpty);
|
|
|
|
int32_t mMaxTransactionCount;
|
|
TransactionStack mDoStack;
|
|
TransactionStack mUndoStack;
|
|
TransactionStack mRedoStack;
|
|
nsCOMArray<nsITransactionListener> mListeners;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
mozilla::TransactionManager*
|
|
nsITransactionManager::AsTransactionManager()
|
|
{
|
|
return static_cast<mozilla::TransactionManager*>(this);
|
|
}
|
|
|
|
#endif // #ifndef mozilla_TransactionManager_h
|