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       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
       2             :  * vim:cindent:ts=2:et:sw=2:
       3             :  *
       4             :  * This Source Code Form is subject to the terms of the Mozilla Public
       5             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       6             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       7             :  *
       8             :  * This Original Code has been modified by IBM Corporation. Modifications made
       9             :  * by IBM described herein are Copyright (c) International Business Machines
      10             :  * Corporation, 2000. Modifications to Mozilla code or documentation identified
      11             :  * per MPL Section 3.3
      12             :  *
      13             :  * Date             Modified by     Description of modification
      14             :  * 04/20/2000       IBM Corp.      OS/2 VisualAge build.
      15             :  */
      16             : 
      17             : /* part of nsFrameManager, to work around header inclusionordering */
      18             : 
      19             : #ifndef _nsFrameManagerBase_h_
      20             : #define _nsFrameManagerBase_h_
      21             : 
      22             : #include "nsDebug.h"
      23             : #include "PLDHashTable.h"
      24             : #include "mozilla/Attributes.h"
      25             : 
      26             : class nsIFrame;
      27             : class nsIPresShell;
      28             : 
      29             : class nsFrameManagerBase
      30             : {
      31             : public:
      32             :   nsFrameManagerBase();
      33             : 
      34             :   bool IsDestroyingFrames() { return mIsDestroyingFrames; }
      35             : 
      36             :   /*
      37             :    * Gets and sets the root frame (typically the viewport). The lifetime of the
      38             :    * root frame is controlled by the frame manager. When the frame manager is
      39             :    * destroyed, it destroys the entire frame hierarchy.
      40             :    */
      41        3821 :   nsIFrame* GetRootFrame() const { return mRootFrame; }
      42          24 :   void      SetRootFrame(nsIFrame* aRootFrame)
      43             :   {
      44          24 :     NS_ASSERTION(!mRootFrame, "already have a root frame");
      45          24 :     mRootFrame = aRootFrame;
      46          24 :   }
      47             : 
      48             : protected:
      49             :   class UndisplayedMap;
      50             : 
      51             :   // weak link, because the pres shell owns us
      52             :   nsIPresShell* MOZ_NON_OWNING_REF mPresShell;
      53             :   nsIFrame*                       mRootFrame;
      54             :   UndisplayedMap*                 mUndisplayedMap;
      55             :   UndisplayedMap*                 mDisplayContentsMap;
      56             :   bool                            mIsDestroyingFrames;  // The frame manager is destroying some frame(s).
      57             : };
      58             : 
      59             : #endif