/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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 Communicator client 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):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 NPL, 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 NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/**
 
  Author:
  Eric D Vaughan

**/

#ifndef nsBoxLayoutState_h___
#define nsBoxLayoutState_h___

#include "nsIFrame.h"
#include "nsCOMPtr.h"
#include "nsIPresContext.h"
#include "nsIPresShell.h"
#include "nsHTMLReflowState.h"

class nsReflowState;
class nsCalculatedBoxInfo;
struct nsHTMLReflowMetrics;
class nsString;
class nsIBox;
class nsHTMLReflowCommand;

class nsBoxLayoutState
{
public:
  enum eBoxLayoutReason {
    Dirty,
    Resize,
    Initial
  };

  nsBoxLayoutState(nsIPresContext* aPresContext, const nsHTMLReflowState& aReflowState, nsHTMLReflowMetrics& aDesiredSize);
  nsBoxLayoutState(nsIPresContext* aPresContext);
  nsBoxLayoutState(nsIPresShell* aShell);
  nsBoxLayoutState(const nsBoxLayoutState& aState);
  virtual ~nsBoxLayoutState() {}

  virtual void HandleReflow(nsIBox* aRootBox);

  virtual nsIPresContext* GetPresContext() { return mPresContext.get(); }
  virtual nsresult GetPresShell(nsIPresShell** aShell);
  virtual nscoord* GetMaxElementWidth();

  virtual void GetScrolledBlockSizeConstraint(nsSize& aSize);
  virtual void SetScrolledBlockSizeConstraint(const nsSize& aSize);
  virtual void GetIncludeOverFlow(PRBool& aOverFlow);
  virtual void SetIncludeOverFlow(const PRBool& aOverFlow);
  virtual void GetLayoutFlags(PRUint32& aFlags);
  virtual void SetLayoutFlags(const PRUint32& aFlags);

  // if true no one under us will paint during reflow.
  virtual void SetDisablePainting(PRBool aDisable) { mDisablePainting = aDisable; }
  virtual PRBool GetDisablePainting() { return mDisablePainting; }

  virtual eBoxLayoutReason GetLayoutReason() { return mType; }
  virtual void SetLayoutReason(eBoxLayoutReason aReason) { mType = aReason; }
  virtual const nsHTMLReflowState* GetReflowState() { return mReflowState; }

  static void* Allocate(size_t sz, nsIPresShell* aPresShell);
  static void Free(void* aPtr, size_t sz);
  static void RecycleFreedMemory(nsIPresShell* aPresShell, void* mem);

  nsresult PushStackMemory();
  nsresult PopStackMemory();
  nsresult AllocateStackMemory(size_t aSize, void** aResult);

private:
  //void DirtyAllChildren(nsBoxLayoutState& aState, nsIBox* aBox);
  void Unwind(nsReflowPath* aReflowPath, nsIBox* aRootBox);
  nsIBox* GetBoxForFrame(nsIFrame* aFrame, PRBool& aIsAdaptor);

  nsCOMPtr<nsIPresContext> mPresContext;
  const nsHTMLReflowState* mReflowState;
  eBoxLayoutReason mType;
  nscoord* mMaxElementWidth;
  nsSize mScrolledBlockSizeConstraint;
  PRBool mIncludeOverFlow;
  PRUint32 mLayoutFlags;
  PRBool mDisablePainting;
};

#endif