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/* -*- Mode: IDL; 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.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corp.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mike Pinkerton
 *
 * 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 MPL, 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 MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"
#include "nsISupportsArray.idl"
#include "nsITransferable.idl"


%{ C++
#include "nsSize.h"
%}

native nsSize (nsSize);


interface nsIDOMDocument;
interface nsIDOMNode;
interface nsIDOMDataTransfer;

[scriptable, uuid(fde41f6a-c710-46f8-a0a8-1ff76ca4ff57)]
interface nsIDragSession : nsISupports
{
  /**
    * Set the current state of the drag, whether it can be dropped or not.
    * usually the target "frame" sets this so the native system can render the correct feedback
    */
  attribute boolean canDrop;

  /**
   * Indicates if the drop event should be dispatched only to chrome.
   */
  attribute boolean onlyChromeDrop;
  
  /**
    * Sets the action (copy, move, link, et.c) for the current drag 
    */ 
  attribute unsigned long dragAction;
  
  /**
    * Sets the current width and height of the drag target area. 
    * It will contain the current size of the Frame that the drag is currently in
    */  
  [noscript] attribute nsSize targetSize;
 
  /**
    * Get the number of items that were dropped
    */
  readonly attribute unsigned long numDropItems;
  
  /**
    * The document where the drag was started, which will be null if the
    * drag originated outside the application. Useful for determining if a drop
    * originated in the same document.
    */
  readonly attribute nsIDOMDocument sourceDocument;

  /**
    * The dom node that was originally dragged to start the session, which will be null if the
    * drag originated outside the application.
    */
  readonly attribute nsIDOMNode sourceNode;

  /**
   * The data transfer object for the current drag.
   */
  attribute nsIDOMDataTransfer dataTransfer;

  /**
    * Get data from a Drag&Drop. Can be called while the drag is in process
    * or after the drop has completed.  
    *
    * @param  aTransferable the transferable for the data to be put into
    * @param  aItemIndex which of multiple drag items, zero-based
    */
  void getData ( in nsITransferable aTransferable, in unsigned long aItemIndex ) ;

   /**
    * Check to set if any of the native data on the clipboard matches this data flavor
    */
  boolean isDataFlavorSupported ( in string aDataFlavor ) ;
  
};


%{ C++

%}