зеркало из https://github.com/mozilla/gecko-dev.git
106 строки
2.9 KiB
C++
106 строки
2.9 KiB
C++
/* 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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#ifndef mozilla_dom_UndoManager_h
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#define mozilla_dom_UndoManager_h
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#include "mozilla/dom/UndoManagerBinding.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsCOMPtr.h"
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#include "nsCOMArray.h"
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#include "nsIContent.h"
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#include "nsTArray.h"
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#include "nsWrapperCache.h"
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#include "mozilla/dom/Nullable.h"
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class nsITransactionManager;
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class nsIMutationObserver;
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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class DOMTransaction;
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class DOMTransactionCallback;
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class UndoManager : public nsISupports,
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public nsWrapperCache
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{
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friend class TxnScopeGuard;
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(UndoManager)
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explicit UndoManager(nsIContent* aNode);
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void Transact(JSContext* aCx, DOMTransaction& aTransaction,
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bool aMerge, ErrorResult& aRv);
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void Undo(JSContext* aCx, ErrorResult& aRv);
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void Redo(JSContext* acx, ErrorResult& aRv);
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void Item(uint32_t aIndex,
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Nullable<nsTArray<nsRefPtr<DOMTransaction> > >& aItems,
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ErrorResult& aRv);
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uint32_t GetLength(ErrorResult& aRv);
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uint32_t GetPosition(ErrorResult& aRv);
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void ClearUndo(ErrorResult& aRv);
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void ClearRedo(ErrorResult& aRv);
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void Disconnect();
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nsISupports* GetParentObject() const
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{
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return mHostNode;
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}
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virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE
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{
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return mozilla::dom::UndoManagerBinding::Wrap(aCx, this);
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}
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nsITransactionManager* GetTransactionManager();
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protected:
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virtual ~UndoManager();
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nsCOMPtr<nsITransactionManager> mTxnManager;
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nsCOMPtr<nsIContent> mHostNode;
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/**
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* Executes |aTransaction| as a manual transaction.
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*/
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void ManualTransact(DOMTransaction* aTransaction,
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ErrorResult& aRv);
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/**
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* Executes |aTransaction| as an automatic transaction, calling
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* aCallback to do the work.
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*/
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void AutomaticTransact(DOMTransaction* aTransaction,
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DOMTransactionCallback* aCallback,
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ErrorResult& aRv);
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/**
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* Appends the transactions in the undo transaction history at |aIndex|
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* to the array |aItems|.
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*/
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void ItemInternal(uint32_t aIndex,
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nsTArray<DOMTransaction*>& aItems,
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ErrorResult& aRv);
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/**
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* Dispatches an event to the undo scope host.
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* @param aPreviousPosition The index of the transaction that
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* triggered the event.
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*/
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void DispatchTransactionEvent(JSContext* aCx, const nsAString& aType,
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uint32_t aPreviousPosition,
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ErrorResult& aRv);
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bool mInTransaction;
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bool mIsDisconnected;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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