gecko-dev/editor/libeditor/DeleteRangeTxn.h

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/* -*- 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 DeleteRangeTxn_h__
#define DeleteRangeTxn_h__
#include "EditAggregateTxn.h"
#include "EditTxn.h"
#include "nsAutoPtr.h"
#include "nsCycleCollectionParticipant.h"
#include "nsID.h"
#include "nsIEditor.h"
#include "nsISupportsImpl.h"
#include "nsRange.h"
#include "nscore.h"
class nsEditor;
class nsINode;
class nsRangeUpdater;
/**
* A transaction that deletes an entire range in the content tree
*/
class DeleteRangeTxn : public EditAggregateTxn
{
public:
/** initialize the transaction.
* @param aEditor the object providing basic editing operations
* @param aRange the range to delete
*/
nsresult Init(nsEditor* aEditor,
nsRange* aRange,
nsRangeUpdater* aRangeUpdater);
DeleteRangeTxn();
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DeleteRangeTxn, EditAggregateTxn)
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
NS_DECL_EDITTXN
NS_IMETHOD RedoTransaction() override;
virtual void LastRelease() override
{
mRange = nullptr;
EditAggregateTxn::LastRelease();
}
protected:
nsresult CreateTxnsToDeleteBetween(nsINode* aNode,
int32_t aStartOffset,
int32_t aEndOffset);
nsresult CreateTxnsToDeleteNodesBetween();
nsresult CreateTxnsToDeleteContent(nsINode* aParent,
int32_t aOffset,
nsIEditor::EDirection aAction);
protected:
/** p1 in the range */
RefPtr<nsRange> mRange;
/** the editor for this transaction */
nsEditor* mEditor;
/** range updater object */
nsRangeUpdater* mRangeUpdater;
};
#endif