/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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 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 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
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 * decision by deleting the provisions above and replace them with the notice
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 * the provisions above, a recipient may use your version of this file under
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 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsIBoxLayout_h___
#define nsIBoxLayout_h___

#include "nsISupports.h"
#include "nsIFrame.h"

class nsPresContext;
class nsBoxLayout;
class nsBoxLayoutState;
class nsIRenderingContext;
struct nsRect;

// {162F6B5F-F926-11d3-BA06-001083023C1E}
#define NS_IBOX_LAYOUT_IID { 0x162f6b5f, 0xf926, 0x11d3, { 0xba, 0x6, 0x0, 0x10, 0x83, 0x2, 0x3c, 0x1e } }

class nsIBoxLayout : public nsISupports {

public:

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IBOX_LAYOUT_IID)

  NS_IMETHOD Layout(nsIBox* aBox, nsBoxLayoutState& aState)=0;

  NS_IMETHOD GetPrefSize(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState, nsSize& aSize)=0;
  NS_IMETHOD GetMinSize(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState, nsSize& aSize)=0;
  NS_IMETHOD GetMaxSize(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState, nsSize& aSize)=0;
  NS_IMETHOD GetFlex(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState, nscoord& aFlex)=0;
  NS_IMETHOD GetAscent(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState, nscoord& aAscent)=0;
  NS_IMETHOD IsCollapsed(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState, PRBool& aCollapsed)=0;

  NS_IMETHOD ChildrenInserted(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aPrevBox, nsIBox* aChildList)=0;
  NS_IMETHOD ChildrenAppended(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)=0;
  NS_IMETHOD ChildrenRemoved(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)=0;
  NS_IMETHOD ChildrenSet(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)=0;
  NS_IMETHOD ChildBecameDirty(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChild)=0;
  NS_IMETHOD BecameDirty(nsIBox* aBox, nsBoxLayoutState& aState)=0;
};

#endif

