GuestDnDPrivate.h@ 94134

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1	/* $Id: GuestDnDPrivate.h 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* Private guest drag and drop code, used by GuestDnDTarget +
4	* GuestDnDSource.
5	*/
6
7	/*
8	* Copyright (C) 2011-2022 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	#ifndef MAIN_INCLUDED_GuestDnDPrivate_h
20	#define MAIN_INCLUDED_GuestDnDPrivate_h
21	#ifndef RT_WITHOUT_PRAGMA_ONCE
22	# pragma once
23	#endif
24
25	#include <iprt/dir.h>
26	#include <iprt/file.h>
27	#include <iprt/path.h>
28
29	#include <VBox/hgcmsvc.h> /* For PVBOXHGCMSVCPARM. */
30	#include <VBox/GuestHost/DragAndDrop.h>
31	#include <VBox/GuestHost/DragAndDropDefs.h>
32	#include <VBox/HostServices/DragAndDropSvc.h>
33
34	/**
35	* Forward prototype declarations.
36	*/
37	class Guest;
38	class GuestDnDBase;
39	class GuestDnDState;
40	class GuestDnDSource;
41	class GuestDnDTarget;
42	class Progress;
43
44	/**
45	* Type definitions.
46	*/
47
48	/** List (vector) of MIME types. */
49	typedef std::vector<com::Utf8Str> GuestDnDMIMEList;
50
51	/**
52	* Class to handle a guest DnD callback event.
53	*/
54	class GuestDnDCallbackEvent
55	{
56	public:
57
58	GuestDnDCallbackEvent(void)
59	: m_SemEvent(NIL_RTSEMEVENT)
60	, m_Rc(VINF_SUCCESS) { }
61
62	virtual ~GuestDnDCallbackEvent(void);
63
64	public:
65
66	int Reset(void);
67
68	int Notify(int rc = VINF_SUCCESS);
69
70	int Result(void) const { return m_Rc; }
71
72	int Wait(RTMSINTERVAL msTimeout);
73
74	protected:
75
76	/** Event semaphore to notify on error/completion. */
77	RTSEMEVENT m_SemEvent;
78	/** Callback result. */
79	int m_Rc;
80	};
81
82	/**
83	* Struct for handling the (raw) meta data.
84	*/
85	struct GuestDnDMetaData
86	{
87	GuestDnDMetaData(void)
88	: pvData(NULL)
89	, cbData(0)
90	, cbAllocated(0)
91	, cbAnnounced(0) { }
92
93	virtual ~GuestDnDMetaData(void)
94	{
95	reset();
96	}
97
98	/**
99	* Adds new meta data.
100	*
101	* @returns New (total) meta data size in bytes.
102	* @param pvDataAdd Pointer of data to add.
103	* @param cbDataAdd Size (in bytes) of data to add.
104	*/
105	size_t add(const void *pvDataAdd, size_t cbDataAdd)
106	{
107	LogFlowThisFunc(("cbAllocated=%zu, cbAnnounced=%zu, pvDataAdd=%p, cbDataAdd=%zu\n",
108	cbAllocated, cbAnnounced, pvDataAdd, cbDataAdd));
109	if (!cbDataAdd)
110	return 0;
111	AssertPtrReturn(pvDataAdd, 0);
112
113	const size_t cbAllocatedTmp = cbData + cbDataAdd;
114	if (cbAllocatedTmp > cbAllocated)
115	{
116	int rc = resize(cbAllocatedTmp);
117	if (RT_FAILURE(rc))
118	return 0;
119	}
120
121	Assert(cbAllocated >= cbData + cbDataAdd);
122	memcpy((uint8_t *)pvData + cbData, pvDataAdd, cbDataAdd);
123
124	cbData += cbDataAdd;
125	cbAnnounced = cbData;
126
127	return cbData;
128	}
129
130	/**
131	* Adds new meta data.
132	*
133	* @returns New (total) meta data size in bytes.
134	* @param vecAdd Meta data to add.
135	*/
136	size_t add(const std::vector<BYTE> &vecAdd)
137	{
138	if (!vecAdd.size())
139	return 0;
140
141	if (vecAdd.size() > UINT32_MAX) /* Paranoia. */
142	return 0;
143
144	return add(&vecAdd.front(), (uint32_t)vecAdd.size());
145	}
146
147	/**
148	* Resets (clears) all data.
149	*/
150	void reset(void)
151	{
152	strFmt = "";
153
154	if (pvData)
155	{
156	Assert(cbAllocated);
157	RTMemFree(pvData);
158	pvData = NULL;
159	}
160
161	cbData = 0;
162	cbAllocated = 0;
163	cbAnnounced = 0;
164	}
165
166	/**
167	* Resizes the allocation size.
168	*
169	* @returns VBox status code.
170	* @param cbSize New allocation size (in bytes).
171	*/
172	int resize(size_t cbSize)
173	{
174	if (!cbSize)
175	{
176	reset();
177	return VINF_SUCCESS;
178	}
179
180	if (cbSize == cbAllocated)
181	return VINF_SUCCESS;
182
183	cbSize = RT_ALIGN_Z(cbSize, PAGE_SIZE);
184
185	if (cbSize > _32M) /* Meta data can be up to 32MB. */
186	return VERR_BUFFER_OVERFLOW;
187
188	void *pvTmp = NULL;
189	if (!cbAllocated)
190	{
191	Assert(cbData == 0);
192	pvTmp = RTMemAllocZ(cbSize);
193	}
194	else
195	{
196	AssertPtr(pvData);
197	pvTmp = RTMemRealloc(pvData, cbSize);
198	}
199
200	if (pvTmp)
201	{
202	pvData = pvTmp;
203	cbAllocated = cbSize;
204	return VINF_SUCCESS;
205	}
206
207	return VERR_NO_MEMORY;
208	}
209
210	/** Format string of this meta data. */
211	com::Utf8Str strFmt;
212	/** Pointer to allocated meta data. */
213	void *pvData;
214	/** Used bytes of meta data. Must not exceed cbAllocated. */
215	size_t cbData;
216	/** Size (in bytes) of allocated meta data. */
217	size_t cbAllocated;
218	/** Size (in bytes) of announced meta data. */
219	size_t cbAnnounced;
220	};
221
222	/**
223	* Struct for accounting shared DnD data to be sent/received.
224	*/
225	struct GuestDnDData
226	{
227	GuestDnDData(void)
228	: cbExtra(0)
229	, cbProcessed(0) { }
230
231	virtual ~GuestDnDData(void)
232	{
233	reset();
234	}
235
236	/**
237	* Adds processed data to the internal accounting.
238	*
239	* @returns New processed data size.
240	* @param cbDataAdd Bytes to add as done processing.
241	*/
242	size_t addProcessed(size_t cbDataAdd)
243	{
244	const size_t cbTotal = getTotalAnnounced(); RT_NOREF(cbTotal);
245	AssertReturn(cbProcessed + cbDataAdd <= cbTotal, 0);
246	cbProcessed += cbDataAdd;
247	return cbProcessed;
248	}
249
250	/**
251	* Returns whether all data has been processed or not.
252	*
253	* @returns \c true if all data has been processed, \c false if not.
254	*/
255	bool isComplete(void) const
256	{
257	const size_t cbTotal = getTotalAnnounced();
258	LogFlowFunc(("cbProcessed=%zu, cbTotal=%zu\n", cbProcessed, cbTotal));
259	AssertReturn(cbProcessed <= cbTotal, true);
260	return (cbProcessed == cbTotal);
261	}
262
263	/**
264	* Returns the percentage (0-100) of the already processed data.
265	*
266	* @returns Percentage (0-100) of the already processed data.
267	*/
268	uint8_t getPercentComplete(void) const
269	{
270	const size_t cbTotal = getTotalAnnounced();
271	return (uint8_t)(cbProcessed * 100 / RT_MAX(cbTotal, 1));
272	}
273
274	/**
275	* Returns the remaining (outstanding) data left for processing.
276	*
277	* @returns Remaining (outstanding) data (in bytes) left for processing.
278	*/
279	size_t getRemaining(void) const
280	{
281	const size_t cbTotal = getTotalAnnounced();
282	AssertReturn(cbProcessed <= cbTotal, 0);
283	return cbTotal - cbProcessed;
284	}
285
286	/**
287	* Returns the total data size (in bytes) announced.
288	*
289	* @returns Total data size (in bytes) announced.
290	*/
291	size_t getTotalAnnounced(void) const
292	{
293	return Meta.cbAnnounced + cbExtra;
294	}
295
296	/**
297	* Returns the total data size (in bytes) available.
298	* For receiving data, this represents the already received data.
299	* For sending data, this represents the data left to send.
300	*
301	* @returns Total data size (in bytes) available.
302	*/
303	size_t getTotalAvailable(void) const
304	{
305	return Meta.cbData + cbExtra;
306	}
307
308	/**
309	* Resets all data.
310	*/
311	void reset(void)
312	{
313	Meta.reset();
314
315	cbExtra = 0;
316	cbProcessed = 0;
317	}
318
319	/** For storing the actual meta data.
320	* This might be an URI list or just plain raw data,
321	* according to the format being sent. */
322	GuestDnDMetaData Meta;
323	/** Extra data to send/receive (in bytes). Can be 0 for raw data.
324	* For (file) transfers this is the total size for all files. */
325	size_t cbExtra;
326	/** Overall size (in bytes) of processed data. */
327	size_t cbProcessed;
328	};
329
330	/** Initial object context state / no state set. */
331	#define DND_OBJ_STATE_NONE 0
332	/** The header was received / sent. */
333	#define DND_OBJ_STATE_HAS_HDR RT_BIT(0)
334	/** Validation mask for object context state. */
335	#define DND_OBJ_STATE_VALID_MASK UINT32_C(0x00000001)
336
337	/**
338	* Base class for keeping around DnD (file) transfer data.
339	* Used for sending / receiving transfer data.
340	*/
341	struct GuestDnDTransferData
342	{
343
344	public:
345
346	GuestDnDTransferData(void)
347	: cObjToProcess(0)
348	, cObjProcessed(0)
349	, pvScratchBuf(NULL)
350	, cbScratchBuf(0) { }
351
352	virtual ~GuestDnDTransferData(void)
353	{
354	destroy();
355	}
356
357	/**
358	* Initializes a transfer data object.
359	*
360	* @param cbBuf Scratch buffer size (in bytes) to use.
361	* If not specified, DND_DEFAULT_CHUNK_SIZE will be used.
362	*/
363	int init(size_t cbBuf = DND_DEFAULT_CHUNK_SIZE)
364	{
365	reset();
366
367	pvScratchBuf = RTMemAlloc(cbBuf);
368	if (!pvScratchBuf)
369	return VERR_NO_MEMORY;
370
371	cbScratchBuf = cbBuf;
372	return VINF_SUCCESS;
373	}
374
375	/**
376	* Destroys a transfer data object.
377	*/
378	void destroy(void)
379	{
380	reset();
381
382	if (pvScratchBuf)
383	{
384	Assert(cbScratchBuf);
385	RTMemFree(pvScratchBuf);
386	pvScratchBuf = NULL;
387	}
388	cbScratchBuf = 0;
389	}
390
391	/**
392	* Resets a transfer data object.
393	*/
394	void reset(void)
395	{
396	LogFlowFuncEnter();
397
398	cObjToProcess = 0;
399	cObjProcessed = 0;
400	}
401
402	/**
403	* Returns whether this transfer object is complete or not.
404	*
405	* @returns \c true if complete, \c false if not.
406	*/
407	bool isComplete(void) const
408	{
409	return (cObjProcessed == cObjToProcess);
410	}
411
412	/** Number of objects to process. */
413	uint64_t cObjToProcess;
414	/** Number of objects already processed. */
415	uint64_t cObjProcessed;
416	/** Pointer to an optional scratch buffer to use for
417	* doing the actual chunk transfers. */
418	void *pvScratchBuf;
419	/** Size (in bytes) of scratch buffer. */
420	size_t cbScratchBuf;
421	};
422
423	/**
424	* Class for keeping around DnD transfer send data (Host -> Guest).
425	*/
426	struct GuestDnDTransferSendData : public GuestDnDTransferData
427	{
428	GuestDnDTransferSendData()
429	: fObjState(0)
430	{
431	RT_ZERO(List);
432	int rc2 = DnDTransferListInit(&List);
433	AssertRC(rc2);
434	}
435
436	virtual ~GuestDnDTransferSendData()
437	{
438	destroy();
439	}
440
441	/**
442	* Destroys the object.
443	*/
444	void destroy(void)
445	{
446	DnDTransferListDestroy(&List);
447	}
448
449	/**
450	* Resets the object.
451	*/
452	void reset(void)
453	{
454	DnDTransferListReset(&List);
455	fObjState = 0;
456
457	GuestDnDTransferData::reset();
458	}
459
460	/** Transfer List to handle. */
461	DNDTRANSFERLIST List;
462	/** Current state of object in transfer.
463	* This is needed for keeping compatibility to old(er) DnD HGCM protocols.
464	*
465	* At the moment we only support transferring one object at a time. */
466	uint32_t fObjState;
467	};
468
469	/**
470	* Context structure for sending data to the guest.
471	*/
472	struct GuestDnDSendCtx : public GuestDnDData
473	{
474	GuestDnDSendCtx(void);
475
476	/**
477	* Resets the object.
478	*/
479	void reset(void);
480
481	/** Pointer to guest target class this context belongs to. */
482	GuestDnDTarget *pTarget;
483	/** Pointer to guest state this context belongs to. */
484	GuestDnDState *pState;
485	/** Target (VM) screen ID. */
486	uint32_t uScreenID;
487	/** Transfer data structure. */
488	GuestDnDTransferSendData Transfer;
489	/** Callback event to use. */
490	GuestDnDCallbackEvent EventCallback;
491	};
492
493	struct GuestDnDTransferRecvData : public GuestDnDTransferData
494	{
495	GuestDnDTransferRecvData()
496	{
497	RT_ZERO(DroppedFiles);
498	int rc2 = DnDDroppedFilesInit(&DroppedFiles);
499	AssertRC(rc2);
500
501	RT_ZERO(List);
502	rc2 = DnDTransferListInit(&List);
503	AssertRC(rc2);
504
505	RT_ZERO(ObjCur);
506	rc2 = DnDTransferObjectInit(&ObjCur);
507	AssertRC(rc2);
508	}
509
510	virtual ~GuestDnDTransferRecvData()
511	{
512	destroy();
513	}
514
515	/**
516	* Destroys the object.
517	*/
518	void destroy(void)
519	{
520	DnDTransferListDestroy(&List);
521	}
522
523	/**
524	* Resets the object.
525	*/
526	void reset(void)
527	{
528	DnDDroppedFilesClose(&DroppedFiles);
529	DnDTransferListReset(&List);
530	DnDTransferObjectReset(&ObjCur);
531
532	GuestDnDTransferData::reset();
533	}
534
535	/** The "VirtualBox Dropped Files" directory on the host we're going
536	* to utilize for transferring files from guest to the host. */
537	DNDDROPPEDFILES DroppedFiles;
538	/** Transfer List to handle.
539	* Currently we only support one transfer list at a time. */
540	DNDTRANSFERLIST List;
541	/** Current transfer object being handled.
542	* Currently we only support one transfer object at a time. */
543	DNDTRANSFEROBJECT ObjCur;
544	};
545
546	/**
547	* Context structure for receiving data from the guest.
548	*/
549	struct GuestDnDRecvCtx : public GuestDnDData
550	{
551	GuestDnDRecvCtx(void);
552
553	/**
554	* Resets the object.
555	*/
556	void reset(void);
557
558	/** Pointer to guest source class this context belongs to. */
559	GuestDnDSource *pSource;
560	/** Pointer to guest state this context belongs to. */
561	GuestDnDState *pState;
562	/** Formats offered by the guest (and supported by the host). */
563	GuestDnDMIMEList lstFmtOffered;
564	/** Original drop format requested to receive from the guest. */
565	com::Utf8Str strFmtReq;
566	/** Intermediate drop format to be received from the guest.
567	* Some original drop formats require a different intermediate
568	* drop format:
569	*
570	* Receiving a file link as "text/plain" requires still to
571	* receive the file from the guest as "text/uri-list" first,
572	* then pointing to the file path on the host with the data
573	* in "text/plain" format returned. */
574	com::Utf8Str strFmtRecv;
575	/** Desired drop action to perform on the host.
576	* Needed to tell the guest if data has to be
577	* deleted e.g. when moving instead of copying. */
578	VBOXDNDACTION enmAction;
579	/** Transfer data structure. */
580	GuestDnDTransferRecvData Transfer;
581	/** Callback event to use. */
582	GuestDnDCallbackEvent EventCallback;
583	};
584
585	/**
586	* Class for maintainig a (buffered) guest DnD message.
587	*/
588	class GuestDnDMsg
589	{
590	public:
591
592	GuestDnDMsg(void)
593	: uMsg(0)
594	, cParms(0)
595	, cParmsAlloc(0)
596	, paParms(NULL) { }
597
598	virtual ~GuestDnDMsg(void)
599	{
600	reset();
601	}
602
603	public:
604
605	/**
606	* Appends a new HGCM parameter to the message and returns the pointer to it.
607	*/
608	PVBOXHGCMSVCPARM getNextParam(void)
609	{
610	if (cParms >= cParmsAlloc)
611	{
612	if (!paParms)
613	paParms = (PVBOXHGCMSVCPARM)RTMemAlloc(4 * sizeof(VBOXHGCMSVCPARM));
614	else
615	paParms = (PVBOXHGCMSVCPARM)RTMemRealloc(paParms, (cParmsAlloc + 4) * sizeof(VBOXHGCMSVCPARM));
616	if (!paParms)
617	throw VERR_NO_MEMORY;
618	RT_BZERO(&paParms[cParmsAlloc], 4 * sizeof(VBOXHGCMSVCPARM));
619	cParmsAlloc += 4;
620	}
621
622	return &paParms[cParms++];
623	}
624
625	/**
626	* Returns the current parameter count.
627	*
628	* @returns Current parameter count.
629	*/
630	uint32_t getCount(void) const { return cParms; }
631
632	/**
633	* Returns the pointer to the beginning of the HGCM parameters array. Use with care.
634	*
635	* @returns Pointer to the beginning of the HGCM parameters array.
636	*/
637	PVBOXHGCMSVCPARM getParms(void) const { return paParms; }
638
639	/**
640	* Returns the message type.
641	*
642	* @returns Message type.
643	*/
644	uint32_t getType(void) const { return uMsg; }
645
646	/**
647	* Resets the object.
648	*/
649	void reset(void)
650	{
651	if (paParms)
652	{
653	/* Remove deep copies. */
654	for (uint32_t i = 0; i < cParms; i++)
655	{
656	if ( paParms[i].type == VBOX_HGCM_SVC_PARM_PTR
657	&& paParms[i].u.pointer.size)
658	{
659	AssertPtr(paParms[i].u.pointer.addr);
660	RTMemFree(paParms[i].u.pointer.addr);
661	}
662	}
663
664	RTMemFree(paParms);
665	paParms = NULL;
666	}
667
668	uMsg = cParms = cParmsAlloc = 0;
669	}
670
671	/**
672	* Appends a new message parameter of type pointer.
673	*
674	* @returns VBox status code.
675	* @param pvBuf Pointer to data to use.
676	* @param cbBuf Size (in bytes) of data to use.
677	*/
678	int appendPointer(void *pvBuf, uint32_t cbBuf)
679	{
680	PVBOXHGCMSVCPARM pParm = getNextParam();
681	if (!pParm)
682	return VERR_NO_MEMORY;
683
684	void *pvTmp = NULL;
685	if (cbBuf)
686	{
687	AssertPtr(pvBuf);
688	pvTmp = RTMemDup(pvBuf, cbBuf);
689	if (!pvTmp)
690	return VERR_NO_MEMORY;
691	}
692
693	HGCMSvcSetPv(pParm, pvTmp, cbBuf);
694	return VINF_SUCCESS;
695	}
696
697	/**
698	* Appends a new message parameter of type string.
699	*
700	* @returns VBox status code.
701	* @param pszString Pointer to string data to use.
702	*/
703	int appendString(const char *pszString)
704	{
705	PVBOXHGCMSVCPARM pParm = getNextParam();
706	if (!pParm)
707	return VERR_NO_MEMORY;
708
709	char *pszTemp = RTStrDup(pszString);
710	if (!pszTemp)
711	return VERR_NO_MEMORY;
712
713	HGCMSvcSetStr(pParm, pszTemp);
714	return VINF_SUCCESS;
715	}
716
717	/**
718	* Appends a new message parameter of type uint32_t.
719	*
720	* @returns VBox status code.
721	* @param u32Val uint32_t value to use.
722	*/
723	int appendUInt32(uint32_t u32Val)
724	{
725	PVBOXHGCMSVCPARM pParm = getNextParam();
726	if (!pParm)
727	return VERR_NO_MEMORY;
728
729	HGCMSvcSetU32(pParm, u32Val);
730	return VINF_SUCCESS;
731	}
732
733	/**
734	* Appends a new message parameter of type uint64_t.
735	*
736	* @returns VBox status code.
737	* @param u64Val uint64_t value to use.
738	*/
739	int appendUInt64(uint64_t u64Val)
740	{
741	PVBOXHGCMSVCPARM pParm = getNextParam();
742	if (!pParm)
743	return VERR_NO_MEMORY;
744
745	HGCMSvcSetU64(pParm, u64Val);
746	return VINF_SUCCESS;
747	}
748
749	/**
750	* Sets the HGCM message type (function number).
751	*
752	* @param uMsgType Message type to set.
753	*/
754	void setType(uint32_t uMsgType) { uMsg = uMsgType; }
755
756	protected:
757
758	/** Message type. */
759	uint32_t uMsg;
760	/** Message parameters. */
761	uint32_t cParms;
762	/** Size of array. */
763	uint32_t cParmsAlloc;
764	/** Array of HGCM parameters */
765	PVBOXHGCMSVCPARM paParms;
766	};
767
768	/** Guest DnD callback function definition. */
769	typedef DECLCALLBACKPTR(int, PFNGUESTDNDCALLBACK,(uint32_t uMsg, void pvParms, size_t cbParms, void pvUser));
770
771	/**
772	* Structure for keeping a guest DnD callback.
773	* Each callback can handle one HGCM message, however, multiple HGCM messages can be registered
774	* to the same callback (function).
775	*/
776	typedef struct GuestDnDCallback
777	{
778	GuestDnDCallback(void)
779	: uMessgage(0)
780	, pfnCallback(NULL)
781	, pvUser(NULL) { }
782
783	GuestDnDCallback(PFNGUESTDNDCALLBACK pvCB, uint32_t uMsg, void *pvUsr = NULL)
784	: uMessgage(uMsg)
785	, pfnCallback(pvCB)
786	, pvUser(pvUsr) { }
787
788	/** The HGCM message ID to handle. */
789	uint32_t uMessgage;
790	/** Pointer to callback function. */
791	PFNGUESTDNDCALLBACK pfnCallback;
792	/** Pointer to user-supplied data. */
793	void *pvUser;
794	} GuestDnDCallback;
795
796	/** Contains registered callback pointers for specific HGCM message types. */
797	typedef std::map<uint32_t, GuestDnDCallback> GuestDnDCallbackMap;
798
799	/**
800	* Class for keeping a DnD guest state around.
801	*/
802	class GuestDnDState
803	{
804
805	public:
806	DECLARE_TRANSLATE_METHODS(GuestDnDState)
807
808	GuestDnDState(const ComObjPtr<Guest>& pGuest);
809	virtual ~GuestDnDState(void);
810
811	public:
812
813	int notifyAboutGuestResponse(void) const;
814	int waitForGuestResponse(RTMSINTERVAL msTimeout = 500) const;
815
816	void setActionsAllowed(VBOXDNDACTIONLIST a) { m_dndLstActionsAllowed = a; }
817	VBOXDNDACTIONLIST getActionsAllowed(void) const { return m_dndLstActionsAllowed; }
818
819	void setActionDefault(VBOXDNDACTION a) { m_dndActionDefault = a; }
820	VBOXDNDACTION getActionDefault(void) const { return m_dndActionDefault; }
821
822	void setFormats(const GuestDnDMIMEList &lstFormats) { m_lstFormats = lstFormats; }
823	GuestDnDMIMEList formats(void) const { return m_lstFormats; }
824
825	void reset(void);
826
827	bool isProgressCanceled(void) const;
828	int setCallback(uint32_t uMsg, PFNGUESTDNDCALLBACK pfnCallback, void *pvUser = NULL);
829	int setProgress(unsigned uPercentage, uint32_t uState, int rcOp = VINF_SUCCESS, const Utf8Str &strMsg = "");
830	HRESULT resetProgress(const ComObjPtr<Guest>& pParent);
831	HRESULT queryProgressTo(IProgress **ppProgress);
832
833	public:
834
835	/** @name HGCM callback handling.
836	@{ */
837	int onDispatch(uint32_t u32Function, void *pvParms, uint32_t cbParms);
838	/** @} */
839
840	public:
841
842	/** Pointer to context this class is tied to. */
843	void *m_pvCtx;
844	/** The DnD protocol version to use, depending on the
845	* installed Guest Additions. See DragAndDropSvc.h for
846	* a protocol changelog. */
847	uint32_t m_uProtocolVersion;
848	/** The guest feature flags reported to the host (VBOX_DND_GF_XXX). */
849	uint64_t m_fGuestFeatures0;
850	/** Event for waiting for response. */
851	RTSEMEVENT m_EventSem;
852	/** Default action to perform in case of a
853	* successful drop. */
854	VBOXDNDACTION m_dndActionDefault;
855	/** Actions supported by the guest in case of a successful drop. */
856	VBOXDNDACTIONLIST m_dndLstActionsAllowed;
857	/** Format(s) requested/supported from the guest. */
858	GuestDnDMIMEList m_lstFormats;
859	/** Pointer to IGuest parent object. */
860	ComObjPtr<Guest> m_pParent;
861	/** Pointer to associated progress object. Optional. */
862	ComObjPtr<Progress> m_pProgress;
863	/** Callback map. */
864	GuestDnDCallbackMap m_mapCallbacks;
865	};
866
867	/**
868	* Private singleton class for the guest's DnD implementation.
869	*
870	* Can't be instanciated directly, only via the factory pattern.
871	* Keeps track of all ongoing DnD transfers.
872	*/
873	class GuestDnD
874	{
875	public:
876
877	/**
878	* Creates the Singleton GuestDnD object.
879	*
880	* @returns Newly created Singleton object, or NULL on failure.
881	*/
882	static GuestDnD *createInstance(const ComObjPtr<Guest>& pGuest)
883	{
884	Assert(NULL == GuestDnD::s_pInstance);
885	GuestDnD::s_pInstance = new GuestDnD(pGuest);
886	return GuestDnD::s_pInstance;
887	}
888
889	/**
890	* Destroys the Singleton GuestDnD object.
891	*/
892	static void destroyInstance(void)
893	{
894	if (GuestDnD::s_pInstance)
895	{
896	delete GuestDnD::s_pInstance;
897	GuestDnD::s_pInstance = NULL;
898	}
899	}
900
901	/**
902	* Returns the Singleton GuestDnD object.
903	*
904	* @returns Pointer to Singleton GuestDnD object, or NULL if not created yet.
905	*/
906	static inline GuestDnD *getInstance(void)
907	{
908	AssertPtr(GuestDnD::s_pInstance);
909	return GuestDnD::s_pInstance;
910	}
911
912	protected:
913
914	/** List of registered DnD sources. */
915	typedef std::list< ComObjPtr<GuestDnDSource> > GuestDnDSrcList;
916	/** List of registered DnD targets. */
917	typedef std::list< ComObjPtr<GuestDnDTarget> > GuestDnDTgtList;
918
919	/** Constructor; will throw rc on failure. */
920	GuestDnD(const ComObjPtr<Guest>& pGuest);
921	virtual ~GuestDnD(void);
922
923	public:
924
925	/** @name Public helper functions.
926	* @{ */
927	HRESULT adjustScreenCoordinates(ULONG uScreenId, ULONG puX, ULONG puY) const;
928	GuestDnDState *getState(uint32_t = 0) const;
929	int hostCall(uint32_t u32Function, uint32_t cParms, PVBOXHGCMSVCPARM paParms) const;
930	GuestDnDMIMEList defaultFormats(void) const { return m_strDefaultFormats; }
931	/** @} */
932
933	/** @name Source / target management.
934	* @{ */
935	int registerSource(const ComObjPtr<GuestDnDSource> &Source);
936	int unregisterSource(const ComObjPtr<GuestDnDSource> &Source);
937	size_t getSourceCount(void);
938
939	int registerTarget(const ComObjPtr<GuestDnDTarget> &Target);
940	int unregisterTarget(const ComObjPtr<GuestDnDTarget> &Target);
941	size_t getTargetCount(void);
942	/** @} */
943
944	public:
945
946	/** @name Static low-level HGCM callback handler.
947	* @{ */
948	static DECLCALLBACK(int) notifyDnDDispatcher(void pvExtension, uint32_t u32Function, void pvParms, uint32_t cbParms);
949	/** @} */
950
951	/** @name Static helper methods.
952	* @{ */
953	static bool isFormatInFormatList(const com::Utf8Str &strFormat, const GuestDnDMIMEList &lstFormats);
954	static GuestDnDMIMEList toFormatList(const com::Utf8Str &strFormats, const com::Utf8Str &strSep = DND_FORMATS_SEPARATOR_STR);
955	static com::Utf8Str toFormatString(const GuestDnDMIMEList &lstFormats);
956	static GuestDnDMIMEList toFilteredFormatList(const GuestDnDMIMEList &lstFormatsSupported, const GuestDnDMIMEList &lstFormatsWanted);
957	static GuestDnDMIMEList toFilteredFormatList(const GuestDnDMIMEList &lstFormatsSupported, const com::Utf8Str &strFormatsWanted);
958	static DnDAction_T toMainAction(VBOXDNDACTION dndAction);
959	static std::vector<DnDAction_T> toMainActions(VBOXDNDACTIONLIST dndActionList);
960	static VBOXDNDACTION toHGCMAction(DnDAction_T enmAction);
961	static void toHGCMActions(DnDAction_T enmDefAction, VBOXDNDACTION pDefAction, const std::vector<DnDAction_T> vecAllowedActions, VBOXDNDACTIONLIST pLstAllowedActions);
962	/** @} */
963
964	protected:
965
966	/** @name Singleton properties.
967	* @{ */
968	/** List of supported default MIME/Content-type formats. */
969	GuestDnDMIMEList m_strDefaultFormats;
970	/** Pointer to guest implementation. */
971	const ComObjPtr<Guest> m_pGuest;
972	/** The current state from the guest. At the
973	* moment we only support only state a time (ARQ-style). */
974	GuestDnDState *m_pState;
975	/** Critical section to serialize access. */
976	RTCRITSECT m_CritSect;
977	/** Number of active transfers (guest->host or host->guest). */
978	uint32_t m_cTransfersPending;
979	GuestDnDSrcList m_lstSrc;
980	GuestDnDTgtList m_lstTgt;
981	/** @} */
982
983	private:
984
985	/** Static pointer to singleton instance. */
986	static GuestDnD *s_pInstance;
987	};
988
989	/** Access to the GuestDnD's singleton instance. */
990	#define GuestDnDInst() GuestDnD::getInstance()
991
992	/** List of pointers to guest DnD Messages. */
993	typedef std::list<GuestDnDMsg *> GuestDnDMsgList;
994
995	/**
996	* IDnDBase class implementation for sharing code between
997	* IGuestDnDSource and IGuestDnDTarget implementation.
998	*/
999	class GuestDnDBase
1000	{
1001	protected:
1002
1003	GuestDnDBase(void);
1004
1005	protected:
1006
1007	/** Shared (internal) IDnDBase method implementations.
1008	* @{ */
1009	bool i_isFormatSupported(const com::Utf8Str &aFormat) const;
1010	const GuestDnDMIMEList &i_getFormats(void) const;
1011	HRESULT i_addFormats(const GuestDnDMIMEList &aFormats);
1012	HRESULT i_removeFormats(const GuestDnDMIMEList &aFormats);
1013	/** @} */
1014
1015	protected:
1016
1017	/** @name Functions for handling a simple host HGCM message queue.
1018	* @{ */
1019	int msgQueueAdd(GuestDnDMsg *pMsg);
1020	GuestDnDMsg *msgQueueGetNext(void);
1021	void msgQueueRemoveNext(void);
1022	void msgQueueClear(void);
1023	/** @} */
1024
1025	int sendCancel(void);
1026	int updateProgress(GuestDnDData pData, GuestDnDState pState, size_t cbDataAdd = 0);
1027	int waitForEvent(GuestDnDCallbackEvent pEvent, GuestDnDState pState, RTMSINTERVAL msTimeout);
1028
1029	protected:
1030
1031	/** @name Public attributes (through getters/setters).
1032	* @{ */
1033	/** Pointer to guest implementation. */
1034	const ComObjPtr<Guest> m_pGuest;
1035	/** List of supported MIME types by the source. */
1036	GuestDnDMIMEList m_lstFmtSupported;
1037	/** List of offered MIME types to the counterpart. */
1038	GuestDnDMIMEList m_lstFmtOffered;
1039	/** Whether the object still is in pending state. */
1040	bool m_fIsPending;
1041	/** Pointer to state bound to this object. */
1042	GuestDnDState *m_pState;
1043	/** @} */
1044
1045	/**
1046	* Internal stuff.
1047	*/
1048	struct
1049	{
1050	/** Outgoing message queue (FIFO). */
1051	GuestDnDMsgList lstMsgOut;
1052	} m_DataBase;
1053	};
1054	#endif /* !MAIN_INCLUDED_GuestDnDPrivate_h */
1055

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source: vbox/trunk/src/VBox/Main/include/GuestDnDPrivate.h@ 94134

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