pjs/editor/libeditor/base/nsEditorUtils.h

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/* -*- 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.
*/
#ifndef nsEditorUtils_h__
#define nsEditorUtils_h__
#include "nsCOMPtr.h"
#include "nsIDOMNode.h"
#include "nsIDOMSelection.h"
#include "nsIEditor.h"
class nsAutoEditBatch
{
private:
nsCOMPtr<nsIEditor> mEd;
public:
nsAutoEditBatch( nsIEditor *aEd) : mEd(do_QueryInterface(aEd))
{ if (mEd) mEd->BeginTransaction(); }
~nsAutoEditBatch() { if (mEd) mEd->EndTransaction(); }
};
class nsAutoEditMayBatch
{
private:
nsCOMPtr<nsIEditor> mEd;
PRBool mDidBatch;
public:
nsAutoEditMayBatch( nsIEditor *aEd) : mEd(do_QueryInterface(aEd)), mDidBatch(PR_FALSE) {}
nsAutoEditMayBatch() { if (mEd && mDidBatch) mEd->EndTransaction(); }
void batch() { if (mEd && !mDidBatch) {mEd->BeginTransaction(); mDidBatch=PR_TRUE;} }
};
class nsAutoSelectionReset
{
private:
/** ref-counted reference to the selection that we are supposed to restore */
nsCOMPtr<nsIDOMSelection> mSel;
/** PR_TRUE if this instance initialized itself correctly */
PRBool mInitialized;
nsCOMPtr<nsIDOMNode> mStartNode;
nsCOMPtr<nsIDOMNode> mEndNode;
PRInt32 mStartOffset;
PRInt32 mEndOffset;
public:
/** constructor responsible for remembering all state needed to restore aSel */
nsAutoSelectionReset(nsIDOMSelection *aSel);
/** destructor restores mSel to its former state */
~nsAutoSelectionReset();
};
#endif // nsEditorUtils_h__