/* -*- 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):
 * Original Author: David W. Hyatt (hyatt@netscape.com)
 *
 * 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 ***** */

#include "nsBoxFrame.h"
#include "nsITreeColFrame.h"
#include "nsITreeBoxObject.h"

class nsSupportsHashtable;

nsresult NS_NewTreeColFrame(nsIPresShell* aPresShell, 
                                nsIFrame** aNewFrame, 
                                PRBool aIsRoot = PR_FALSE,
                                nsIBoxLayout* aLayoutManager = nsnull);

// The actual frame that paints the cells and rows.
class nsTreeColFrame : public nsBoxFrame, public nsITreeColFrame
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSITREECOLFRAME

  friend nsresult NS_NewTreeColFrame(nsIPresShell* aPresShell, 
                                         nsIFrame** aNewFrame, 
                                         PRBool aIsRoot,
                                         nsIBoxLayout* aLayoutManager);

  NS_IMETHODIMP Init(nsIPresContext*  aPresContext,
                     nsIContent*      aContent,
                     nsIFrame*        aParent,
                     nsIStyleContext* aContext,
                     nsIFrame*        aPrevInFlow);

  NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext,
                              const nsPoint& aPoint, // Overridden to capture events
                              nsFramePaintLayer aWhichLayer,
                              nsIFrame**     aFrame);

  NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
                              nsIContent* aChild,
                              PRInt32 aNameSpaceID,
                              nsIAtom* aAttribute,
                              PRInt32 aModType, 
                              PRInt32 aHint);


protected:
  nsTreeColFrame(nsIPresShell* aPresShell, PRBool aIsRoot = nsnull, nsIBoxLayout* aLayoutManager = nsnull);
  virtual ~nsTreeColFrame();

protected:
  // Members.
  
  void EnsureTree();
  void InvalidateColumnCache(nsIPresContext* aPresContext);
  
  nsCOMPtr<nsITreeBoxObject> mTree;
}; // class nsTreeColFrame