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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 *****
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00015  * The Original Code is mozilla.org code.
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00017  * The Initial Developer of the Original Code is
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 #ifndef nsDragService_h__
00039 #define nsDragService_h__
00040 
00041 #include "nsBaseDragService.h"
00042 
00043 struct IDropSource;
00044 struct IDataObject;
00045 class  nsNativeDragTarget;
00046 class  nsDataObjCollection;
00047 
00052 class nsDragService : public nsBaseDragService
00053 {
00054 public:
00055   nsDragService();
00056   virtual ~nsDragService();
00057   
00058   // nsIDragService
00059   NS_IMETHOD InvokeDragSession(nsIDOMNode *aDOMNode,
00060                                nsISupportsArray *anArrayTransferables,
00061                                nsIScriptableRegion *aRegion,
00062                                PRUint32 aActionType);
00063 
00064   // nsIDragSession
00065   NS_IMETHOD GetData(nsITransferable * aTransferable, PRUint32 anItem);
00066   NS_IMETHOD GetNumDropItems(PRUint32 * aNumItems);
00067   NS_IMETHOD IsDataFlavorSupported(const char *aDataFlavor, PRBool *_retval);
00068   NS_IMETHOD EndDragSession();
00069 
00070   // native impl.
00071   NS_IMETHOD SetIDataObject(IDataObject * aDataObj);
00072   NS_IMETHOD StartInvokingDragSession(IDataObject * aDataObj,
00073                                       PRUint32 aActionType);
00074 
00075 protected:
00076   nsDataObjCollection* GetDataObjCollection(IDataObject * aDataObj);
00077 
00078   // determine if we have a single data object or one of our private
00079   // collections
00080   PRBool IsCollectionObject(IDataObject* inDataObj);
00081 
00082   IDropSource * mNativeDragSrc;
00083   nsNativeDragTarget * mNativeDragTarget;
00084   IDataObject * mDataObject;
00085 };
00086 
00087 #endif // nsDragService_h__