pjs/editor/base/JoinElementTxn.cpp

141 строка
3.8 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 "JoinElementTxn.h"
#include "nsIDOMNodeList.h"
#include "nsIEditorSupport.h"
static NS_DEFINE_IID(kIEditorSupportIID, NS_IEDITORSUPPORT_IID);
JoinElementTxn::JoinElementTxn()
: EditTxn()
{
}
NS_IMETHODIMP JoinElementTxn::Init(nsIEditor *aEditor,
nsIDOMNode *aLeftNode,
nsIDOMNode *aRightNode)
{
mEditor = do_QueryInterface(aEditor);
mLeftNode = do_QueryInterface(aLeftNode);
mRightNode = do_QueryInterface(aRightNode);
mOffset=0;
return NS_OK;
}
JoinElementTxn::~JoinElementTxn()
{
}
NS_IMETHODIMP JoinElementTxn::Do(void)
{
nsresult result;
if ((mLeftNode) && (mRightNode))
{ // get the parent node
nsCOMPtr<nsIDOMNode>leftParent;
result = mLeftNode->GetParentNode(getter_AddRefs(leftParent));
if ((NS_SUCCEEDED(result)) && (leftParent))
{ // verify that mLeftNode and mRightNode have the same parent
nsCOMPtr<nsIDOMNode>rightParent;
result = mRightNode->GetParentNode(getter_AddRefs(rightParent));
if ((NS_SUCCEEDED(result)) && (rightParent))
{
if (leftParent==rightParent)
{
mParent=leftParent; // set this instance mParent.
// Other methods see a non-null mParent and know all is well
nsCOMPtr<nsIDOMNodeList> childNodes;
result = mLeftNode->GetChildNodes(getter_AddRefs(childNodes));
if ((NS_SUCCEEDED(result)) && (childNodes))
{
childNodes->GetLength(&mOffset);
}
//XXX: WRONG! needs commented code below
/*
result = mEditor->QueryInterface(kIEditorSupportIID, getter_AddRefs(editor));
if (NS_SUCCEEDED(result) && editor) {
result = editor->JoinNodesImpl(mLeftNode, mRightNode, mParent, PR_FALSE);
*/
result = mEditor->JoinNodes(mLeftNode, mRightNode, mParent, PR_FALSE);
}
}
}
}
return result;
}
NS_IMETHODIMP JoinElementTxn::Undo(void)
{
nsresult result;
nsCOMPtr<nsIEditorSupport> editor;
result = mEditor->QueryInterface(kIEditorSupportIID, getter_AddRefs(editor));
if (NS_SUCCEEDED(result) && editor) {
result = editor->SplitNodeImpl(mRightNode, mOffset, mLeftNode, mParent);
}
else {
result = NS_ERROR_NOT_IMPLEMENTED;
}
return result;
}
NS_IMETHODIMP JoinElementTxn::Redo(void)
{
nsresult result = mEditor->JoinNodes(mLeftNode, mRightNode, mParent, PR_FALSE);
return result;
}
NS_IMETHODIMP JoinElementTxn::GetIsTransient(PRBool *aIsTransient)
{
if (nsnull!=aIsTransient)
*aIsTransient = PR_FALSE;
return NS_OK;
}
nsresult JoinElementTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
if (nsnull!=aDidMerge)
*aDidMerge=PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP JoinElementTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP JoinElementTxn::GetUndoString(nsString **aString)
{
if (nsnull!=aString)
{
**aString="Join Element";
}
return NS_OK;
}
NS_IMETHODIMP JoinElementTxn::GetRedoString(nsString **aString)
{
if (nsnull!=aString)
{
**aString="Split Element";
}
return NS_OK;
}