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124 lines
3.1 KiB
C++
124 lines
3.1 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 "JoinElementTxn.h"
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#include "nsIDOMNodeList.h"
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JoinElementTxn::JoinElementTxn()
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: EditTxn()
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{
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}
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nsresult JoinElementTxn::Init(nsIEditor *aEditor,
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nsIDOMNode *aLeftNode,
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nsIDOMNode *aRightNode)
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{
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mEditor = aEditor;
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mLeftNode = aLeftNode;
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mRightNode = aRightNode;
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mOffset=0;
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return NS_OK;
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}
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JoinElementTxn::~JoinElementTxn()
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{
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}
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nsresult JoinElementTxn::Do(void)
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{
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nsresult result;
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if ((mLeftNode) && (mRightNode))
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{ // get the parent node
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nsCOMPtr<nsIDOMNode>leftParent;
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result = mLeftNode->GetParentNode(getter_AddRefs(leftParent));
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if ((NS_SUCCEEDED(result)) && (leftParent))
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{ // verify that mLeftNode and mRightNode have the same parent
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nsCOMPtr<nsIDOMNode>rightParent;
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result = mRightNode->GetParentNode(getter_AddRefs(rightParent));
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if ((NS_SUCCEEDED(result)) && (rightParent))
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{
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if (leftParent==rightParent)
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{
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mParent=leftParent; // set this instance mParent.
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// Other methods see a non-null mParent and know all is well
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nsCOMPtr<nsIDOMNodeList> childNodes;
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result = mLeftNode->GetChildNodes(getter_AddRefs(childNodes));
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if ((NS_SUCCEEDED(result)) && (childNodes))
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{
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childNodes->GetLength(&mOffset);
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}
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result = mEditor->JoinNodes(mLeftNode, mRightNode, mParent, PR_FALSE);
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}
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}
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}
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}
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return result;
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}
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nsresult JoinElementTxn::Undo(void)
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{
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nsresult result = mEditor->SplitNode(mRightNode, mOffset, mLeftNode, mParent);
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return result;
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}
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nsresult JoinElementTxn::Redo(void)
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{
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nsresult result = mEditor->JoinNodes(mLeftNode, mRightNode, mParent, PR_FALSE);
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return result;
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}
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nsresult JoinElementTxn::GetIsTransient(PRBool *aIsTransient)
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{
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if (nsnull!=aIsTransient)
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*aIsTransient = PR_FALSE;
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return NS_OK;
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}
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nsresult JoinElementTxn::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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nsresult JoinElementTxn::Write(nsIOutputStream *aOutputStream)
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{
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return NS_OK;
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}
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nsresult JoinElementTxn::GetUndoString(nsString **aString)
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{
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if (nsnull!=aString)
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{
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**aString="Join Element";
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}
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return NS_OK;
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}
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nsresult JoinElementTxn::GetRedoString(nsString **aString)
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{
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if (nsnull!=aString)
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{
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**aString="Split Element";
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}
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return NS_OK;
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}
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