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131 lines
3.4 KiB
C++
131 lines
3.4 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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#include "ChangeAttributeTxn.h"
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#include "nsIDOMElement.h"
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#include "nsEditor.h"
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ChangeAttributeTxn::ChangeAttributeTxn()
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: EditTxn()
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{
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}
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ChangeAttributeTxn::~ChangeAttributeTxn()
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{
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}
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NS_IMETHODIMP ChangeAttributeTxn::Init(nsIEditor *aEditor,
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nsIDOMElement *aElement,
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const nsString& aAttribute,
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const nsString& aValue,
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PRBool aRemoveAttribute)
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{
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if (nsnull!=aEditor && nsnull!=aElement)
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{
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mEditor = aEditor;
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mElement = do_QueryInterface(aElement);
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mAttribute = aAttribute;
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mValue = aValue;
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mRemoveAttribute = aRemoveAttribute;
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mAttributeWasSet=PR_FALSE;
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mUndoValue="";
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return NS_OK;
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}
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else
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return NS_ERROR_NULL_POINTER;
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}
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NS_IMETHODIMP ChangeAttributeTxn::Do(void)
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{
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// need to get the current value of the attribute and save it, and set mAttributeWasSet
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nsresult result = mEditor->GetAttributeValue(mElement, mAttribute, mUndoValue, mAttributeWasSet);
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// XXX: hack until attribute-was-set code is implemented
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if (PR_FALSE==mUndoValue.Equals(""))
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mAttributeWasSet=PR_TRUE;
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// XXX: end hack
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// now set the attribute to the new value
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if (PR_FALSE==mRemoveAttribute)
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result = mElement->SetAttribute(mAttribute, mValue);
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else
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result = mElement->RemoveAttribute(mAttribute);
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return result;
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}
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NS_IMETHODIMP ChangeAttributeTxn::Undo(void)
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{
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nsresult result=NS_OK;
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if (PR_TRUE==mAttributeWasSet)
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result = mElement->SetAttribute(mAttribute, mUndoValue);
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else
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result = mElement->RemoveAttribute(mAttribute);
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return result;
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}
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NS_IMETHODIMP ChangeAttributeTxn::Redo(void)
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{
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nsresult result;
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if (PR_FALSE==mRemoveAttribute)
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result = mElement->SetAttribute(mAttribute, mValue);
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else
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result = mElement->RemoveAttribute(mAttribute);
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return result;
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}
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NS_IMETHODIMP ChangeAttributeTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
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{
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if (nsnull!=aDidMerge)
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*aDidMerge=PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP ChangeAttributeTxn::Write(nsIOutputStream *aOutputStream)
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{
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return NS_OK;
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}
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NS_IMETHODIMP ChangeAttributeTxn::GetUndoString(nsString *aString)
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{
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if (nsnull!=aString)
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{
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if (PR_FALSE==mRemoveAttribute)
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*aString="Change Attribute: ";
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else
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*aString="Remove Attribute: ";
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*aString += mAttribute;
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}
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return NS_OK;
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}
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NS_IMETHODIMP ChangeAttributeTxn::GetRedoString(nsString *aString)
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{
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if (nsnull!=aString)
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{
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if (PR_FALSE==mRemoveAttribute)
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*aString="Change Attribute: ";
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else
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*aString="Add Attribute: ";
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*aString += mAttribute;
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}
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return NS_OK;
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}
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