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113 lines
3.1 KiB
C++
113 lines
3.1 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 InsertTextTxn_h__
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#define InsertTextTxn_h__
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#include "EditTxn.h"
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#include "nsIDOMCharacterData.h"
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#include "nsCOMPtr.h"
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#define INSERT_TEXT_TXN_IID \
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{/* 93276f00-ab2c-11d2-8f4b-006008159b0c*/ \
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0x93276f00, 0xab2c, 0x11d2, \
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{0x8f, 0xb4, 0x0, 0x60, 0x8, 0x15, 0x9b, 0xc} }
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class nsIPresShell;
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/**
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* A transaction that inserts text into a content node.
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*/
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class InsertTextTxn : public EditTxn
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{
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public:
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virtual ~InsertTextTxn();
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/** used to name aggregate transactions that consist only of a single InsertTextTxn,
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* or a DeleteSelection followed by an InsertTextTxn.
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*/
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static nsIAtom *gInsertTextTxnName;
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/** initialize the transaction
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* @param aElement the text content node
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* @param aOffset the location in aElement to do the insertion
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* @param aString the new text to insert
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* @param aPresShell used to get and set the selection
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*/
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NS_IMETHOD Init(nsIDOMCharacterData *aElement,
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PRUint32 aOffset,
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const nsString& aString,
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nsIPresShell* aPresShell);
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private:
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InsertTextTxn();
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public:
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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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// nsISupports declarations
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// override QueryInterface to handle InsertTextTxn request
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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static const nsIID& GetIID() { static nsIID iid = INSERT_TEXT_TXN_IID; return iid; }
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/** return the string data associated with this transaction */
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NS_IMETHOD GetData(nsString& aResult);
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/** must be called before any InsertTextTxn is instantiated */
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static nsresult ClassInit();
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protected:
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/** return PR_TRUE if aOtherTxn immediately follows this txn */
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virtual PRBool IsSequentialInsert(InsertTextTxn *aOtherTxn);
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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 insertion is to take place */
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PRUint32 mOffset;
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/** the text to insert into mElement at mOffset */
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nsString mStringToInsert;
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/** the presentation shell, which we'll need to get the selection */
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nsIPresShell* mPresShell;
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friend class TransactionFactory;
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friend class nsDerivedSafe<InsertTextTxn>; // work around for a compiler bug
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};
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#endif
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