gecko-dev/editor/base/nsEditorUtils.cpp

69 lines
2.1 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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "nsEditorUtils.h"
#include "nsIDOMDocument.h"
/******************************************************************************
* nsAutoSelectionReset
*****************************************************************************/
nsAutoSelectionReset::nsAutoSelectionReset(nsIDOMSelection *aSel)
{
mInitialized = PR_FALSE;
mSel = do_QueryInterface(aSel);
if (mSel)
{
mSel->GetAnchorNode(getter_AddRefs(mStartNode));
mSel->GetAnchorOffset(&mStartOffset);
mSel->GetFocusNode(getter_AddRefs(mEndNode));
mSel->GetFocusOffset(&mEndOffset);
if (mStartNode && mEndNode)
mInitialized = PR_TRUE;
}
}
nsAutoSelectionReset::~nsAutoSelectionReset()
{
if (mSel && mInitialized)
{
// make sure that mStartNode and mEndNode are still in a document
nsCOMPtr<nsIDOMDocument> docStart;
nsresult res = mStartNode->GetOwnerDocument(getter_AddRefs(docStart));
if (NS_SUCCEEDED(res) && docStart)
{
nsCOMPtr<nsIDOMDocument> docEnd;
res = mEndNode->GetOwnerDocument(getter_AddRefs(docEnd));
if (NS_SUCCEEDED(res) && (docStart == docEnd))
{
// restore original selection
mSel->Collapse(mStartNode, mStartOffset);
mSel->Extend(mEndNode, mEndOffset);
}
}
}
}