pjs/layout/base/nsFrameManagerBase.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim:cindent:ts=2:et:sw=2:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
* Brian Ryner <bryner@brianryner.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK *****
*
* This Original Code has been modified by IBM Corporation. Modifications made
* by IBM described herein are Copyright (c) International Business Machines
* Corporation, 2000. Modifications to Mozilla code or documentation identified
* per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. OS/2 VisualAge build.
*/
/* part of nsFrameManager, to work around header inclusionordering */
#ifndef _nsFrameManagerBase_h_
#define _nsFrameManagerBase_h_
#include "pldhash.h"
class nsIPresShell;
class nsStyleSet;
class nsIContent;
class nsPlaceholderFrame;
class nsIFrame;
class nsStyleContext;
class nsIAtom;
class nsStyleChangeList;
class nsILayoutHistoryState;
class nsFrameManagerBase
{
public:
nsFrameManagerBase()
{
memset(this, '\0', sizeof(nsFrameManagerBase));
}
bool IsDestroyingFrames() { return mIsDestroyingFrames; }
/*
* Gets and sets the root frame (typically the viewport). The lifetime of the
* root frame is controlled by the frame manager. When the frame manager is
* destroyed, it destroys the entire frame hierarchy.
*/
NS_HIDDEN_(nsIFrame*) GetRootFrame() const { return mRootFrame; }
NS_HIDDEN_(void) SetRootFrame(nsIFrame* aRootFrame)
{
NS_ASSERTION(!mRootFrame, "already have a root frame");
mRootFrame = aRootFrame;
}
protected:
class UndisplayedMap;
// weak link, because the pres shell owns us
nsIPresShell* mPresShell;
// the pres shell owns the style set
nsStyleSet* mStyleSet;
nsIFrame* mRootFrame;
PLDHashTable mPlaceholderMap;
UndisplayedMap* mUndisplayedMap;
bool mIsDestroyingFrames; // The frame manager is destroying some frame(s).
};
#endif