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140 lines
4.8 KiB
C++
140 lines
4.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "ChangeAttributeTxn.h"
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#include "nsIDOMElement.h"
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ChangeAttributeTxn::ChangeAttributeTxn()
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: EditTxn()
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{
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(ChangeAttributeTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_NSCOMPTR(mElement)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mElement)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_ADDREF_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_IMPL_RELEASE_INHERITED(ChangeAttributeTxn, EditTxn)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeAttributeTxn)
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NS_INTERFACE_MAP_END_INHERITING(EditTxn)
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NS_IMETHODIMP ChangeAttributeTxn::Init(nsIEditor *aEditor,
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nsIDOMElement *aElement,
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const nsAString& aAttribute,
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const nsAString& aValue,
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bool aRemoveAttribute)
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{
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NS_ASSERTION(aEditor && aElement, "bad arg");
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if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }
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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=false;
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mUndoValue.Truncate();
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return NS_OK;
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}
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NS_IMETHODIMP ChangeAttributeTxn::DoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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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 (!mUndoValue.IsEmpty())
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mAttributeWasSet = 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 (!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::UndoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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nsresult result;
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if (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::RedoTransaction(void)
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{
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NS_ASSERTION(mEditor && mElement, "bad state");
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if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }
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nsresult result;
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if (!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::GetTxnDescription(nsAString& aString)
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{
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aString.AssignLiteral("ChangeAttributeTxn: [mRemoveAttribute == ");
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if (!mRemoveAttribute)
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aString.AppendLiteral("false] ");
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else
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aString.AppendLiteral("true] ");
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aString += mAttribute;
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return NS_OK;
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}
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