зеркало из https://github.com/mozilla/pjs.git
89 строки
2.4 KiB
C++
89 строки
2.4 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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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_IID \
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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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/** 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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virtual nsresult 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 nsresult Do(void);
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virtual nsresult Undo(void);
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virtual nsresult Merge(PRBool *aDidMerge, nsITransaction *aTransaction);
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virtual nsresult Write(nsIOutputStream *aOutputStream);
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virtual nsresult GetUndoString(nsString **aString);
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virtual nsresult GetRedoString(nsString **aString);
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protected:
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/** the provider of basic editing operations */
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nsCOMPtr<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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