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lightning-sunbird  0.9+nobinonly
nsDragService.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Fredrik Holmqvist <thesuckiestemail@yahoo.se>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsDragService_h__
00040 #define nsDragService_h__
00041 
00042 #include "nsBaseDragService.h"
00043 #include "nsIDragSessionBeOS.h"
00044 #include <String.h>
00045 
00046 class BMessage;
00047 
00051 class nsDragService : public nsBaseDragService, public nsIDragSessionBeOS
00052 {
00053 
00054 public:
00055   nsDragService();
00056   virtual ~nsDragService();
00057 
00058   //nsISupports
00059   NS_DECL_ISUPPORTS_INHERITED
00060   
00061   //nsIDragService
00062   NS_IMETHOD InvokeDragSession(nsIDOMNode *aDOMNode,
00063                                nsISupportsArray * anArrayTransferables,
00064                                nsIScriptableRegion * aRegion,
00065                                PRUint32 aActionType);
00066   NS_IMETHOD StartDragSession();
00067   NS_IMETHOD EndDragSession();
00068   
00069   // nsIDragSession
00070   NS_IMETHOD GetNumDropItems      (PRUint32 * aNumItems);
00071   NS_IMETHOD GetData              (nsITransferable * aTransferable,
00072                                    PRUint32 aItemIndex);
00073   NS_IMETHOD IsDataFlavorSupported(const char *aDataFlavor, 
00074                                    PRBool *_retval);
00075 
00076   NS_IMETHOD GetCanDrop(PRBool * aCanDrop);
00077   NS_IMETHOD SetCanDrop(PRBool aCanDrop);
00078 
00079   // nsIDragSessionBeOS
00080   NS_IMETHOD UpdateDragMessageIfNeeded(BMessage *aDragMessage);
00081   NS_IMETHOD TransmitData(BMessage *aNegotiationReply);
00082 
00083 
00084 protected:
00085   nsCOMPtr<nsISupportsArray> mSourceDataItems;
00086 
00087 private:
00088   // BeOS specific methods
00089   void ResetDragInfo(void);
00090   
00091   BMessage      *mDragMessage;
00092   
00093   //If we want to do image-dragging  
00094   //BBitmap   *dragBitmap;
00095 
00096   // internal drag identifier for lists
00097   BString        gMimeListType;
00098   PRPackedBool         IsDragList(void);
00099   PRPackedBool         mDragIsList;
00100 
00101   // get the initial drag message for this drag
00102   BMessage * CreateDragMessage();
00103   static const char * FlavorToBeMime(const char * flavor);
00104 };
00105 
00106 #endif // nsDragService_h__