/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * The contents of this file are subject to the Netscape Public License * Version 1.0 (the "NPL"); you may not use this file except in * compliance with the NPL. You may obtain a copy of the NPL at * http://www.mozilla.org/NPL/ * * Software distributed under the NPL is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL * for the specific language governing rights and limitations under the * NPL. * * The Initial Developer of this code under the NPL is Netscape * Communications Corporation. Portions created by Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All Rights * Reserved. */ #ifndef DeleteTextTxn_h__ #define DeleteTextTxn_h__ #include "EditTxn.h" #include "nsIEditor.h" #include "nsIDOMCharacterData.h" #include "nsCOMPtr.h" #define DELETE_TEXT_TXN_IID \ {/* 4d3a2720-ac49-11d2-86d8-000064657374 */ \ 0x4d3a2720, 0xac49, 0x11d2, \ {0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} } /** * A transaction that removes text from a content node. */ class DeleteTextTxn : public EditTxn { public: /** initialize the transaction. * @param aEditor the provider of basic editing operations * @param aElement the content node to remove text from * @param aOffset the location in aElement to begin the deletion * @param aNumCharsToDelete the number of characters to delete. Not the number of bytes! */ NS_IMETHOD Init(nsIEditor *aEditor, nsIDOMCharacterData *aElement, PRUint32 aOffset, PRUint32 aNumCharsToDelete); private: DeleteTextTxn(); public: virtual ~DeleteTextTxn(); NS_IMETHOD Do(void); NS_IMETHOD Undo(void); NS_IMETHOD Merge(PRBool *aDidMerge, nsITransaction *aTransaction); NS_IMETHOD Write(nsIOutputStream *aOutputStream); NS_IMETHOD GetUndoString(nsString *aString); NS_IMETHOD GetRedoString(nsString *aString); protected: /** the provider of basic editing operations */ nsIEditor* mEditor; /** the text element to operate upon */ nsCOMPtr mElement; /** the offset into mElement where the deletion is to take place */ PRUint32 mOffset; /** the number of characters to delete */ PRUint32 mNumCharsToDelete; /** the text that was deleted */ nsString mDeletedText; friend class TransactionFactory; }; #endif