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135 lines
3.6 KiB
C++
135 lines
3.6 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 IMETextTxn_h__
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#define IMETextTxn_h__
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#include "EditTxn.h"
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#include "nsIDOMCharacterData.h"
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#include "nsIPrivateTextRange.h"
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#include "nsCOMPtr.h"
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#include "nsWeakPtr.h"
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// {D4D25721-2813-11d3-9EA3-0060089FE59B}
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#define IME_TEXT_TXN_CID \
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{0xd4d25721, 0x2813, 0x11d3, \
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{0x9e, 0xa3, 0x0, 0x60, 0x8, 0x9f, 0xe5, 0x9b }}
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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 IMETextTxn : public EditTxn
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{
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public:
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static const nsIID& GetCID() { static nsIID iid = IME_TEXT_TXN_CID; return iid; }
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virtual ~IMETextTxn();
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/** used to name aggregate transactions that consist only of a single IMETextTxn,
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* or a DeleteSelection followed by an IMETextTxn.
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*/
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static nsIAtom *gIMETextTxnName;
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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 aReplaceLength the length of text to replace (0= no replacement)
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* @param aString the new text to insert
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* @param aSelCon 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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PRUint32 aReplaceLength,
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nsIPrivateTextRangeList* aTextRangeList,
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const nsString& aString,
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nsWeakPtr aSelCon);
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private:
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IMETextTxn();
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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 IMETextTxn request
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NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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/** return the string data associated with this transaction */
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NS_IMETHOD GetData(nsString& aResult, nsIPrivateTextRangeList** aTextRangeList);
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/** must be called before any IMETextTxn is instantiated */
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static nsresult ClassInit();
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/** must be called once we are guaranteed all IMETextTxn have completed */
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static nsresult ClassShutdown();
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enum { kTransactionID = 11220 };
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protected:
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NS_IMETHOD CollapseTextSelection(void);
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/** the text element to operate upon */
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nsCOMPtr<nsIDOMCharacterData> mElement;
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/** the offsets into mElement where the insertion should be placed*/
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PRUint32 mOffset;
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PRUint32 mReplaceLength;
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/** the text to insert into mElement at mOffset */
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nsString mStringToInsert;
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/** the range list **/
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nsCOMPtr<nsIPrivateTextRangeList> mRangeList;
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/** the selection controller, which we'll need to get the selection */
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nsWeakPtr mSelConWeak; // use a weak reference
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PRBool mFixed;
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friend class TransactionFactory;
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friend class nsDerivedSafe<IMETextTxn>; // work around for a compiler bug
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};
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#endif
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