michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef DeleteRangeTxn_h__
michael@0: #define DeleteRangeTxn_h__
michael@0: 
michael@0: #include "EditAggregateTxn.h"
michael@0: #include "EditTxn.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: #include "nsID.h"
michael@0: #include "nsIEditor.h"
michael@0: #include "nsISupportsImpl.h"
michael@0: #include "nsRange.h"
michael@0: #include "nscore.h"
michael@0: 
michael@0: class nsEditor;
michael@0: class nsINode;
michael@0: class nsRangeUpdater;
michael@0: 
michael@0: /**
michael@0:  * A transaction that deletes an entire range in the content tree
michael@0:  */
michael@0: class DeleteRangeTxn : public EditAggregateTxn
michael@0: {
michael@0: public:
michael@0:   /** initialize the transaction.
michael@0:     * @param aEditor the object providing basic editing operations
michael@0:     * @param aRange  the range to delete
michael@0:     */
michael@0:   nsresult Init(nsEditor* aEditor,
michael@0:                 nsRange* aRange,
michael@0:                 nsRangeUpdater* aRangeUpdater);
michael@0: 
michael@0:   DeleteRangeTxn();
michael@0: 
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteRangeTxn, EditAggregateTxn)
michael@0:   NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
michael@0: 
michael@0:   NS_DECL_EDITTXN
michael@0: 
michael@0:   NS_IMETHOD RedoTransaction();
michael@0: 
michael@0:   virtual void LastRelease()
michael@0:   {
michael@0:     mRange = nullptr;
michael@0:     EditAggregateTxn::LastRelease();
michael@0:   }
michael@0: protected:
michael@0: 
michael@0:   nsresult CreateTxnsToDeleteBetween(nsINode* aNode,
michael@0:                                      int32_t aStartOffset,
michael@0:                                      int32_t aEndOffset);
michael@0: 
michael@0:   nsresult CreateTxnsToDeleteNodesBetween();
michael@0: 
michael@0:   nsresult CreateTxnsToDeleteContent(nsINode* aParent,
michael@0:                                      int32_t aOffset,
michael@0:                                      nsIEditor::EDirection aAction);
michael@0: 
michael@0: protected:
michael@0: 
michael@0:   /** p1 in the range */
michael@0:   nsRefPtr<nsRange> mRange;
michael@0: 
michael@0:   /** the editor for this transaction */
michael@0:   nsEditor* mEditor;
michael@0: 
michael@0:   /** range updater object */
michael@0:   nsRangeUpdater* mRangeUpdater;
michael@0: };
michael@0: 
michael@0: #endif