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98 lines
2.6 KiB
C++
98 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef DeleteTextTxn_h__
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#define DeleteTextTxn_h__
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#include "EditTxn.h"
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#include "nsIEditor.h"
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#include "nsIDOMCharacterData.h"
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#include "nsCOMPtr.h"
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#define DELETE_TEXT_TXN_CID \
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{/* 4d3a2720-ac49-11d2-86d8-000064657374 */ \
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0x4d3a2720, 0xac49, 0x11d2, \
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{0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
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/**
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* A transaction that removes text from a content node.
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*/
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class DeleteTextTxn : public EditTxn
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{
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public:
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static const nsIID& GetCID() { static nsIID iid = DELETE_TEXT_TXN_CID; return iid; }
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/** initialize the transaction.
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* @param aEditor the provider of basic editing operations
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* @param aElement the content node to remove text from
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* @param aOffset the location in aElement to begin the deletion
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* @param aNumCharsToDelete the number of characters to delete. Not the number of bytes!
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*/
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NS_IMETHOD Init(nsIEditor *aEditor,
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nsIDOMCharacterData *aElement,
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PRUint32 aOffset,
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PRUint32 aNumCharsToDelete);
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private:
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DeleteTextTxn();
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public:
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virtual ~DeleteTextTxn();
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NS_IMETHOD Do(void);
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NS_IMETHOD Undo(void);
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NS_IMETHOD Merge(PRBool *aDidMerge, nsITransaction *aTransaction);
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NS_IMETHOD Write(nsIOutputStream *aOutputStream);
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NS_IMETHOD GetUndoString(nsString *aString);
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NS_IMETHOD GetRedoString(nsString *aString);
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enum { kTransactionID = 11130 };
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protected:
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/** the provider of basic editing operations */
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nsIEditor* mEditor;
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/** the text element to operate upon */
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nsCOMPtr<nsIDOMCharacterData> mElement;
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/** the offset into mElement where the deletion is to take place */
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PRUint32 mOffset;
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/** the number of characters to delete */
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PRUint32 mNumCharsToDelete;
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/** the text that was deleted */
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nsString mDeletedText;
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friend class TransactionFactory;
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};
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#endif
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