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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * 1.1 (the "License"); you may not use this file except in compliance with
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 *
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 * 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
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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#ifndef nsIBoxLayout_h___
#define nsIBoxLayout_h___

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

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

// 6a529924-c73d-4fae-af7a-0e8084e701d5
#define NS_IBOX_LAYOUT_IID \
{ 0x6a529924, 0xc73d, 0x4fae, \
 { 0xaf, 0x7a, 0x0e, 0x80, 0x84, 0xe7, 0x01, 0xd5 } }

class nsIBoxLayout : public nsISupports {

public:

  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IBOX_LAYOUT_IID)

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

  virtual nsSize GetPrefSize(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState)=0;
  virtual nsSize GetMinSize(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState)=0;
  virtual nsSize GetMaxSize(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState)=0;
  virtual nscoord GetAscent(nsIBox* aBox, nsBoxLayoutState& aBoxLayoutState)=0;

  // FIXME: Bug 507416.  The Children* notifications don't actually
  // use all those arguments.  Can we just simplify the signatures?
  virtual void ChildrenInserted(nsIBox* aBox, nsBoxLayoutState& aState,
                                nsIBox* aPrevBox,
                                const nsFrameList::Slice& aNewChildren)=0;
  virtual void ChildrenAppended(nsIBox* aBox, nsBoxLayoutState& aState,
                                const nsFrameList::Slice& aNewChildren)=0;
  virtual void ChildrenRemoved(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)=0;
  virtual void ChildrenSet(nsIBox* aBox, nsBoxLayoutState& aState, nsIBox* aChildList)=0;
  virtual void IntrinsicWidthsDirty(nsIBox* aBox, nsBoxLayoutState& aState)=0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIBoxLayout, NS_IBOX_LAYOUT_IID)

#endif