summaryrefslogtreecommitdiff
path: root/include/svtools/transfer.hxx
blob: 4f8966bcb4bf34e3902eac0a8866fb1372d9dbc2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef _TRANSFER_HXX
#define _TRANSFER_HXX

#include "svtools/svtdllapi.h"
#include <tools/globname.hxx>
#include <tools/gen.hxx>
#include <sot/formats.hxx>
#include <cppuhelper/implbase1.hxx>
#include <cppuhelper/implbase4.hxx>
#include <com/sun/star/frame/XTerminateListener.hpp>
#include <com/sun/star/lang/XUnoTunnel.hpp>
#include <com/sun/star/datatransfer/XTransferable.hpp>
#include <com/sun/star/datatransfer/clipboard/XClipboardOwner.hpp>
#include <com/sun/star/datatransfer/dnd/DNDConstants.hpp>
#include <com/sun/star/datatransfer/dnd/XDragGestureRecognizer.hpp>
#include <com/sun/star/datatransfer/dnd/XDropTarget.hpp>
#include <com/sun/star/datatransfer/dnd/DropTargetDragEvent.hpp>
#include <com/sun/star/datatransfer/dnd/DropTargetDropEvent.hpp>
#include <com/sun/star/datatransfer/dnd/XDragSourceListener.hpp>
#include <com/sun/star/datatransfer/dnd/XDropTargetListener.hpp>
#include <com/sun/star/embed/Aspects.hpp>
#include <com/sun/star/io/XInputStream.hpp>

class BitmapEx;
class GDIMetaFile;
class Graphic;
class ImageMap;
class SotStorageStreamRef;
class INetBookmark;
class INetImage;
class FileList;
class Window;
class Link;

// Drag&Drop defines

#define DND_ACTION_NONE     ::com::sun::star::datatransfer::dnd::DNDConstants::ACTION_NONE
#define DND_ACTION_COPY     ::com::sun::star::datatransfer::dnd::DNDConstants::ACTION_COPY
#define DND_ACTION_MOVE     ::com::sun::star::datatransfer::dnd::DNDConstants::ACTION_MOVE
#define DND_ACTION_COPYMOVE ::com::sun::star::datatransfer::dnd::DNDConstants::ACTION_COPY_OR_MOVE
#define DND_ACTION_LINK     ::com::sun::star::datatransfer::dnd::DNDConstants::ACTION_LINK

#define DND_POINTER_NONE    0
#define DND_IMAGE_NONE      0

struct TransferableObjectDescriptor
{
    SvGlobalName        maClassName;
    sal_uInt16          mnViewAspect;
    Point               maDragStartPos;
    Size                maSize;
    sal_uInt32          mnOle2Misc;
    OUString            maTypeName;
    OUString            maDisplayName;
    sal_Bool            mbCanLink;

    TransferableObjectDescriptor()
        : mnViewAspect(::com::sun::star::embed::Aspects::MSOLE_CONTENT)
        , mnOle2Misc(0)
        , mbCanLink(false)
    {}

    SVT_DLLPUBLIC friend SvStream&  operator>>( SvStream& rIStm, TransferableObjectDescriptor& rObjDesc );
    SVT_DLLPUBLIC friend SvStream&  operator<<( SvStream& rOStm, const TransferableObjectDescriptor& rObjDesc );
};

struct AcceptDropEvent
{
    sal_Int8                                                        mnAction;
    Point                                                           maPosPixel;
    const ::com::sun::star::datatransfer::dnd::DropTargetDragEvent  maDragEvent;
    sal_Bool                                                        mbLeaving;
    sal_Bool                                                        mbDefault;

    AcceptDropEvent() :
        mnAction( DND_ACTION_NONE ),
        mbLeaving( sal_False ),
        mbDefault( sal_False ) {}

    AcceptDropEvent( sal_Int8 nAction,
                     const Point& rPosPixel,
                     const ::com::sun::star::datatransfer::dnd::DropTargetDragEvent& rDragEvent,
                     sal_Bool bLeaving = sal_False ) :
        mnAction( nAction ),
        maPosPixel( rPosPixel ),
        maDragEvent( rDragEvent ),
        mbLeaving( bLeaving ),
        mbDefault( sal_False ) {}
};

struct ExecuteDropEvent
{
    sal_Int8                                                        mnAction;
    Point                                                           maPosPixel;
    const ::com::sun::star::datatransfer::dnd::DropTargetDropEvent  maDropEvent;
    sal_Bool                                                        mbDefault;

    ExecuteDropEvent() :
        mnAction( DND_ACTION_NONE ),
        mbDefault( sal_False ) {}

    ExecuteDropEvent( sal_Int8 nAction,
                      const Point& rPosPixel,
                      const ::com::sun::star::datatransfer::dnd::DropTargetDropEvent& rDropEvent ) :
        mnAction( nAction ),
        maPosPixel( rPosPixel ),
        maDropEvent( rDropEvent ),
        mbDefault( sal_False ) {}
};

class SVT_DLLPUBLIC TransferableHelper : public ::cppu::WeakImplHelper4< ::com::sun::star::datatransfer::XTransferable,
                                                           ::com::sun::star::datatransfer::clipboard::XClipboardOwner,
                                                           ::com::sun::star::datatransfer::dnd::XDragSourceListener,
                                                           ::com::sun::star::lang::XUnoTunnel >
{
private:

    // nested class to implement the XTerminateListener interface
    class TerminateListener : public ::cppu::WeakImplHelper1< ::com::sun::star::frame::XTerminateListener >
    {
    private:

        TransferableHelper& mrParent;

    private:

        // XEventListener
        virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw( ::com::sun::star::uno::RuntimeException );

        // XTerminateListener
        virtual void SAL_CALL queryTermination( const ::com::sun::star::lang::EventObject& aEvent ) throw( ::com::sun::star::frame::TerminationVetoException, ::com::sun::star::uno::RuntimeException );
        virtual void SAL_CALL notifyTermination( const ::com::sun::star::lang::EventObject& aEvent ) throw( ::com::sun::star::uno::RuntimeException );

    public:

                              TerminateListener( TransferableHelper& rDropTargetHelper );
        virtual               ~TerminateListener();
    };

    friend class TransferableHelper::TerminateListener;

private:

    ::com::sun::star::uno::Any                                                                          maAny;
    OUString                                                                                     maLastFormat;
    mutable ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::clipboard::XClipboard >   mxClipboard;
    ::com::sun::star::uno::Reference< ::com::sun::star::frame::XTerminateListener >                     mxTerminateListener;
    DataFlavorExVector*                                                                                 mpFormats;
    TransferableObjectDescriptor*                                                                       mpObjDesc;

protected:
    inline const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::clipboard::XClipboard >&
        getOwnClipboard() const { return mxClipboard; }

private:

    // XTransferable
    virtual ::com::sun::star::uno::Any SAL_CALL getTransferData( const ::com::sun::star::datatransfer::DataFlavor& rFlavor ) throw(::com::sun::star::datatransfer::UnsupportedFlavorException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
    virtual ::com::sun::star::uno::Sequence< ::com::sun::star::datatransfer::DataFlavor > SAL_CALL getTransferDataFlavors() throw(::com::sun::star::uno::RuntimeException);
    virtual sal_Bool SAL_CALL isDataFlavorSupported( const ::com::sun::star::datatransfer::DataFlavor& rFlavor ) throw(::com::sun::star::uno::RuntimeException);

    // XEventListener
    virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw(::com::sun::star::uno::RuntimeException);

    // XDragSourceListener
    virtual void SAL_CALL dragDropEnd( const ::com::sun::star::datatransfer::dnd::DragSourceDropEvent& dsde ) throw(::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL dragEnter( const ::com::sun::star::datatransfer::dnd::DragSourceDragEvent& dsde ) throw(::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL dragExit( const ::com::sun::star::datatransfer::dnd::DragSourceEvent& dse ) throw(::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL dragOver( const ::com::sun::star::datatransfer::dnd::DragSourceDragEvent& dsde ) throw(::com::sun::star::uno::RuntimeException);
    virtual void SAL_CALL dropActionChanged( const ::com::sun::star::datatransfer::dnd::DragSourceDragEvent& dsde ) throw(::com::sun::star::uno::RuntimeException);

private:

    // XClipboardOwner
    virtual void SAL_CALL lostOwnership( const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::clipboard::XClipboard >& xClipboard, const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >& xTrans ) throw(::com::sun::star::uno::RuntimeException);

protected:
    // derivees need to access lostOwnership in case hey override it
    // on windows, changing the access rights to a method gives unresolved externals, so we introduce
    // this impl-method here 'til the next incompatible update
    inline  void    implCallOwnLostOwnership(
                        const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::clipboard::XClipboard >& _rxClipboard,
                        const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >& _rxTrans
                    )
            {
                TransferableHelper::lostOwnership( _rxClipboard, _rxTrans );
            }


private:

    SVT_DLLPRIVATE void             ImplFlush();

protected:

    virtual             ~TransferableHelper();

    void                AddFormat( SotFormatStringId nFormat );
    void                AddFormat( const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    void                RemoveFormat( SotFormatStringId nFormat );
    void                RemoveFormat( const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            HasFormat( SotFormatStringId nFormat );
    inline sal_Bool     HasFormat( const ::com::sun::star::datatransfer::DataFlavor& rFlavor ) { return isDataFlavorSupported( rFlavor ); }
    void                ClearFormats();

    sal_Bool            SetAny( const ::com::sun::star::uno::Any& rAny, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetString( const OUString& rString, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetBitmapEx( const BitmapEx& rBitmap, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetGDIMetaFile( const GDIMetaFile& rMtf, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetGraphic( const Graphic& rGraphic, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetImageMap( const ImageMap& rIMap, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetTransferableObjectDescriptor( const TransferableObjectDescriptor& rDesc, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetINetBookmark( const INetBookmark& rBmk, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetINetImage( const INetImage& rINtImg, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    sal_Bool            SetObject( void* pUserObject, sal_uInt32 nUserObjectId, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );

protected:

    virtual void        AddSupportedFormats() = 0;
    virtual sal_Bool    GetData( const ::com::sun::star::datatransfer::DataFlavor& rFlavor ) = 0;
    virtual sal_Bool    WriteObject( SotStorageStreamRef& rxOStm, void* pUserObject, sal_uInt32 nUserObjectId, const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    virtual void        DragFinished( sal_Int8 nDropAction );
    virtual void        ObjectReleased();

public:

                        TransferableHelper();

    void                PrepareOLE( const TransferableObjectDescriptor& rObjDesc );

    void                CopyToClipboard( Window *pWindow ) const;
    void                CopyToSelection( Window *pWindow ) const;
    void                StartDrag( Window* pWindow, sal_Int8 nDragSourceActions,
                                   sal_Int32 nDragPointer = DND_POINTER_NONE,
                                   sal_Int32 nDragImage = DND_IMAGE_NONE );

    static void         ClearSelection( Window *pWindow );

    static ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::clipboard::XClipboard > GetSystemClipboard();
    static const ::com::sun::star::uno::Sequence< sal_Int8 >& getUnoTunnelId();

public:

    virtual sal_Int64 SAL_CALL getSomething( const ::com::sun::star::uno::Sequence< sal_Int8 >& rId ) throw( ::com::sun::star::uno::RuntimeException );
};

struct TransferableDataHelper_Impl;

class SVT_DLLPUBLIC TransferableDataHelper
{
    friend class DropTargetHelper;

private:

    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >           mxTransfer;
    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::clipboard::XClipboard >   mxClipboard;
    DataFlavorExVector*                                                                         mpFormats;
    TransferableObjectDescriptor*                                                               mpObjDesc;
    TransferableDataHelper_Impl*                                                                mpImpl;

protected:
    void                        InitFormats();

public:

    static void                 FillDataFlavorExVector( const ::com::sun::star::uno::Sequence< ::com::sun::star::datatransfer::DataFlavor >& rDataFlavorSeq,
                                                        DataFlavorExVector& rDataFlavorExVector );

                                TransferableDataHelper();
                                TransferableDataHelper( const TransferableDataHelper& rDataHelper );
                                TransferableDataHelper( const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >& rxTransferable );
                                ~TransferableDataHelper();

    TransferableDataHelper&     operator=( const TransferableDataHelper& rDataHelper );

    const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >&    GetTransferable() const { return mxTransfer; }
    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >           GetXTransferable() const;

    sal_Bool                    HasFormat( SotFormatStringId nFormat ) const;
    sal_Bool                    HasFormat( const ::com::sun::star::datatransfer::DataFlavor& rFlavor ) const;

    sal_uInt32                  GetFormatCount() const;

    SotFormatStringId                           GetFormat( sal_uInt32 nFormat ) const;
    ::com::sun::star::datatransfer::DataFlavor  GetFormatDataFlavor( sal_uInt32 nFormat ) const;

    DataFlavorExVector&         GetDataFlavorExVector() const {return *mpFormats; }

    sal_Bool                    StartClipboardListening( );
    void                        StopClipboardListening( );

    void                        Rebind( const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::XTransferable >& _rxNewData );

public:

    ::com::sun::star::uno::Any  GetAny( SotFormatStringId nFormat ) const;
    ::com::sun::star::uno::Any  GetAny( const ::com::sun::star::datatransfer::DataFlavor& rFlavor ) const;

    sal_Bool                    GetString( SotFormatStringId nFormat, String& rStr );
    sal_Bool                    GetString( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, String& rStr );

    sal_Bool                    GetString( SotFormatStringId nFormat, OUString& rStr );
    sal_Bool                    GetString( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, OUString& rStr );

    sal_Bool                    GetBitmapEx( SotFormatStringId nFormat, BitmapEx& rBmp );
    sal_Bool                    GetBitmapEx( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, BitmapEx& rBmp );

    sal_Bool                    GetGDIMetaFile( SotFormatStringId nFormat, GDIMetaFile& rMtf );
    sal_Bool                    GetGDIMetaFile( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, GDIMetaFile& rMtf );

    sal_Bool                    GetGraphic( SotFormatStringId nFormat, Graphic& rGraphic );
    sal_Bool                    GetGraphic( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, Graphic& rGraphic );

    sal_Bool                    GetImageMap( SotFormatStringId nFormat, ImageMap& rIMap );
    sal_Bool                    GetImageMap( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, ImageMap& rImap );

    sal_Bool                    GetTransferableObjectDescriptor( SotFormatStringId nFormat, TransferableObjectDescriptor& rDesc );
    sal_Bool                    GetTransferableObjectDescriptor( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, TransferableObjectDescriptor& rDesc );

    sal_Bool                    GetINetBookmark( SotFormatStringId nFormat, INetBookmark& rBmk );
    sal_Bool                    GetINetBookmark( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, INetBookmark& rBmk );

    sal_Bool                    GetINetImage( SotFormatStringId nFormat, INetImage& rINtImg );
    sal_Bool                    GetINetImage( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, INetImage& rINtImg );

    sal_Bool                    GetFileList( SotFormatStringId nFormat, FileList& rFileList );
    sal_Bool                    GetFileList( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, FileList& rFileList );

    sal_Bool                    GetSequence( SotFormatStringId nFormat, ::com::sun::star::uno::Sequence< sal_Int8 >& rSeq );
    sal_Bool                    GetSequence( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, ::com::sun::star::uno::Sequence< sal_Int8 >& rSeq );

    sal_Bool                    GetSotStorageStream( SotFormatStringId nFormat, SotStorageStreamRef& rStreamRef );
    sal_Bool                    GetSotStorageStream( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, SotStorageStreamRef& rStreamRef );

    sal_Bool                    GetInputStream( SotFormatStringId nFormat, ::com::sun::star::uno::Reference < com::sun::star::io::XInputStream >& xStream );
    sal_Bool                    GetInputStream( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, ::com::sun::star::uno::Reference < com::sun::star::io::XInputStream >& xStream );

    sal_Bool                    GetInterface( const ::com::sun::star::datatransfer::DataFlavor& rFlavor, ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& rIf );

public:

    static TransferableDataHelper   CreateFromSystemClipboard( Window * pWindow );
    static TransferableDataHelper   CreateFromSelection( Window * pWindow );
    static sal_Bool                 IsEqual( const ::com::sun::star::datatransfer::DataFlavor& rInternalFlavor,
                                             const ::com::sun::star::datatransfer::DataFlavor& rRequestFlavor,
                                             sal_Bool bCompareParameters = sal_False );
};

class SVT_DLLPUBLIC DragSourceHelper
{
private:

    // nested class to implement the XDragGestureListener interface
    class DragGestureListener : public ::cppu::WeakImplHelper1< ::com::sun::star::datatransfer::dnd::XDragGestureListener >
    {
    private:

        DragSourceHelper&   mrParent;

    private:

        // XEventListener
        virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw(::com::sun::star::uno::RuntimeException);

        // XDragGestureListener
        virtual void SAL_CALL dragGestureRecognized( const ::com::sun::star::datatransfer::dnd::DragGestureEvent& rDGE ) throw( ::com::sun::star::uno::RuntimeException );

    public:

        DragGestureListener( DragSourceHelper& rDragSourceHelper );
        ~DragGestureListener();
    };

    friend class DragSourceHelper::DragGestureListener;

private:

    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::dnd::XDragGestureRecognizer > mxDragGestureRecognizer;
    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::dnd::XDragGestureListener >   mxDragGestureListener;

                        // not available
                        DragSourceHelper();
    DragSourceHelper&   operator=( const DragSourceHelper& rDragSourceHelper );
    sal_Bool            operator==( const DragSourceHelper& rDragSourceHelper ) const;

public:

                        // to be overridden by the application
    virtual void        StartDrag( sal_Int8 nAction, const Point& rPosPixel );

                        DragSourceHelper( Window* pWindow );
    virtual             ~DragSourceHelper();
};

class SVT_DLLPUBLIC DropTargetHelper
{
private:

    // nested class to implement the XDropTargetListener interface
    class DropTargetListener : public ::cppu::WeakImplHelper1< ::com::sun::star::datatransfer::dnd::XDropTargetListener >
    {
    private:

        DropTargetHelper&   mrParent;
        AcceptDropEvent*    mpLastDragOverEvent;

    private:

        // XEventListener
        virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& Source ) throw(::com::sun::star::uno::RuntimeException);

        // XDropTargetListener
        virtual void SAL_CALL drop( const ::com::sun::star::datatransfer::dnd::DropTargetDropEvent& dtde ) throw(::com::sun::star::uno::RuntimeException);
        virtual void SAL_CALL dragEnter( const ::com::sun::star::datatransfer::dnd::DropTargetDragEnterEvent& dtdee ) throw(::com::sun::star::uno::RuntimeException);
        virtual void SAL_CALL dragExit( const ::com::sun::star::datatransfer::dnd::DropTargetEvent& dte ) throw(::com::sun::star::uno::RuntimeException);
        virtual void SAL_CALL dragOver( const ::com::sun::star::datatransfer::dnd::DropTargetDragEvent& dtde ) throw(::com::sun::star::uno::RuntimeException);
        virtual void SAL_CALL dropActionChanged( const ::com::sun::star::datatransfer::dnd::DropTargetDragEvent& dtde ) throw(::com::sun::star::uno::RuntimeException);

    public:

        DropTargetListener( DropTargetHelper& rDropTargetHelper );
        ~DropTargetListener();
    };

    friend class DropTargetHelper::DropTargetListener;

private:

    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::dnd::XDropTarget >            mxDropTarget;
    ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::dnd::XDropTargetListener >    mxDropTargetListener;
    DataFlavorExVector*                                                                             mpFormats;

                        // not available
                        DropTargetHelper();
    DropTargetHelper&   operator=( const DropTargetHelper& rDropTargetHelper );
    sal_Bool            operator==( const DropTargetHelper& rDropTargetHelper ) const;

    void                ImplConstruct();

                        // called by our own implementation of XDropTargetListener (DropTargetListener instance)
    void                ImplBeginDrag( const ::com::sun::star::uno::Sequence< ::com::sun::star::datatransfer::DataFlavor >& rSupportedDataFlavors );
    void                ImplEndDrag();

public:

                        // to be overridden by the application
    virtual sal_Int8    AcceptDrop( const AcceptDropEvent& rEvt );
    virtual sal_Int8    ExecuteDrop( const ExecuteDropEvent& rEvt );

                        DropTargetHelper( Window* pWindow );
                        DropTargetHelper( const ::com::sun::star::uno::Reference< ::com::sun::star::datatransfer::dnd::XDropTarget >& rxDropTarget );

    virtual             ~DropTargetHelper();

                        // typically called by the application in ::AcceptDrop and ::ExecuteDrop and (see above)
    sal_Bool            IsDropFormatSupported( SotFormatStringId nFormat );
    sal_Bool            IsDropFormatSupported( const ::com::sun::star::datatransfer::DataFlavor& rFlavor );

    DataFlavorExVector& GetDataFlavorExVector() const {return *mpFormats; }

};

struct TransferDataContainer_Impl;

class SVT_DLLPUBLIC TransferDataContainer : public TransferableHelper
{
    TransferDataContainer_Impl* pImpl;

protected:

    virtual void        AddSupportedFormats();
    virtual sal_Bool    GetData( const ::com::sun::star::datatransfer::DataFlavor& rFlavor );
    virtual void        DragFinished( sal_Int8 nDropAction );

public:

                        TransferDataContainer();
                        ~TransferDataContainer();

    void                CopyINetBookmark( const INetBookmark& rBkmk );
    void                CopyINetImage( const INetImage& rINtImg );
    void                CopyImageMap( const ImageMap& rImgMap );
    void                CopyGraphic( const Graphic& rGrf );
    void                CopyString( const String& rStr );
    void                CopyString( sal_uInt16 nFmt, const String& rStr );
    void                CopyAny( sal_uInt16 nFmt, const ::com::sun::star::uno::Any& rAny );

    void                CopyByteString( sal_uLong nFormatId, const OString& rStr );
    void                CopyAnyData( sal_uLong nFormatId, const sal_Char* pData, sal_uLong nLen );

    sal_Bool            HasAnyData() const;

    using TransferableHelper::StartDrag;
    void                StartDrag( Window* pWindow, sal_Int8 nDragSourceActions,
                                   const Link& rCallbck,
                                   sal_Int32 nDragPointer = DND_POINTER_NONE,
                                   sal_Int32 nDragImage = DND_IMAGE_NONE );
};

#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */