зеркало из https://github.com/mozilla/gecko-dev.git
87 строки
2.3 KiB
C++
87 строки
2.3 KiB
C++
/* -*- 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.
|
|
*/
|
|
|
|
#include "DeleteTextTxn.h"
|
|
#include "editor.h"
|
|
#include "nsIDOMCharacterData.h"
|
|
|
|
// note that aEditor is not refcounted
|
|
DeleteTextTxn::DeleteTextTxn(nsEditor *aEditor,
|
|
nsIDOMCharacterData *aElement,
|
|
PRUint32 aOffset,
|
|
PRUint32 aNumCharsToDelete)
|
|
: EditTxn(aEditor)
|
|
{
|
|
mElement = aElement;
|
|
mOffset = aOffset;
|
|
mNumCharsToDelete = aNumCharsToDelete;
|
|
mDeletedText = "";
|
|
}
|
|
|
|
nsresult DeleteTextTxn::Do(void)
|
|
{
|
|
// get the text that we're about to delete
|
|
nsresult result = mElement->SubstringData(mOffset, mNumCharsToDelete, mDeletedText);
|
|
NS_ASSERTION(NS_SUCCEEDED(result), "could not get text to delete.");
|
|
return (mElement->DeleteData(mOffset, mNumCharsToDelete));
|
|
}
|
|
|
|
nsresult DeleteTextTxn::Undo(void)
|
|
{
|
|
return (mElement->InsertData(mOffset, mDeletedText));
|
|
}
|
|
|
|
nsresult DeleteTextTxn::GetIsTransient(PRBool *aIsTransient)
|
|
{
|
|
if (nsnull!=aIsTransient)
|
|
*aIsTransient = PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult DeleteTextTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
|
|
{
|
|
if (nsnull!=aDidMerge)
|
|
*aDidMerge=PR_FALSE;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult DeleteTextTxn::Write(nsIOutputStream *aOutputStream)
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult DeleteTextTxn::GetUndoString(nsString **aString)
|
|
{
|
|
if (nsnull!=aString)
|
|
{
|
|
**aString="Insert Text: ";
|
|
**aString += mDeletedText;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult DeleteTextTxn::GetRedoString(nsString **aString)
|
|
{
|
|
if (nsnull!=aString)
|
|
{
|
|
**aString="Remove Text: ";
|
|
**aString += mDeletedText;
|
|
}
|
|
return NS_OK;
|
|
}
|