GuestDnDPrivate.cpp@ 93931

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1	/* $Id: GuestDnDPrivate.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* Private guest drag and drop code, used by GuestDnDTarget + GuestDnDSource.
4	*/
5
6	/*
7	* Copyright (C) 2011-2022 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	#define LOG_GROUP LOG_GROUP_GUEST_DND
19	#include "LoggingNew.h"
20
21	#include "GuestImpl.h"
22	#include "AutoCaller.h"
23
24	#ifdef VBOX_WITH_DRAG_AND_DROP
25	# include "ConsoleImpl.h"
26	# include "ProgressImpl.h"
27	# include "GuestDnDPrivate.h"
28
29	# include <algorithm>
30
31	# include <iprt/dir.h>
32	# include <iprt/path.h>
33	# include <iprt/stream.h>
34	# include <iprt/semaphore.h>
35	# include <iprt/cpp/utils.h>
36
37	# include <VMMDev.h>
38
39	# include <VBox/GuestHost/DragAndDrop.h>
40	# include <VBox/HostServices/DragAndDropSvc.h>
41	# include <VBox/version.h>
42
43	/** @page pg_main_dnd Dungeons & Dragons - Overview
44	* Overview:
45	*
46	* Drag and Drop is handled over the internal HGCM service for the host <->
47	* guest communication. Beside that we need to map the Drag and Drop protocols
48	* of the various OS's we support to our internal channels, this is also highly
49	* communicative in both directions. Unfortunately HGCM isn't really designed
50	* for that. Next we have to foul some of the components. This includes to
51	* trick X11 on the guest side, but also Qt needs to be tricked on the host
52	* side a little bit.
53	*
54	* The following components are involved:
55	*
56	* 1. GUI: Uses the Qt classes for Drag and Drop and mainly forward the content
57	* of it to the Main IGuest / IGuestDnDSource / IGuestDnDTarget interfaces.
58	* 2. Main: Public interface for doing Drag and Drop. Also manage the IProgress
59	* interfaces for blocking the caller by showing a progress dialog (see
60	* this file).
61	* 3. HGCM service: Handle all messages from the host to the guest at once and
62	* encapsulate the internal communication details (see dndmanager.cpp and
63	* friends).
64	* 4. Guest Additions: Split into the platform neutral part (see
65	* VBoxGuestR3LibDragAndDrop.cpp) and the guest OS specific parts.
66	* Receive/send message from/to the HGCM service and does all guest specific
67	* operations. For Windows guests VBoxTray is in charge, whereas on UNIX-y guests
68	* VBoxClient will be used.
69	*
70	* Terminology:
71	*
72	* All transfers contain a MIME format and according meta data. This meta data then can
73	* be interpreted either as raw meta data or something else. When raw meta data is
74	* being handled, this gets passed through to the destination (guest / host) without
75	* modification. Other meta data (like URI lists) can and will be modified by the
76	* receiving side before passing to OS. How and when modifications will be applied
77	* depends on the MIME format.
78	*
79	* Host -> Guest:
80	* 1. There are DnD Enter, Move, Leave events which are send exactly like this
81	* to the guest. The info includes the position, MIME types and allowed actions.
82	* The guest has to respond with an action it would accept, so the GUI could
83	* change the cursor accordingly.
84	* 2. On drop, first a drop event is sent. If this is accepted a drop data
85	* event follows. This blocks the GUI and shows some progress indicator.
86	*
87	* Guest -> Host:
88	* 1. The GUI is asking the guest if a DnD event is pending when the user moves
89	* the cursor out of the view window. If so, this returns the mimetypes and
90	* allowed actions.
91	* (2. On every mouse move this is asked again, to make sure the DnD event is
92	* still valid.)
93	* 3. On drop the host request the data from the guest. This blocks the GUI and
94	* shows some progress indicator.
95	*
96	* Implementation hints:
97	* m_strSupportedFormats here in this file defines the allowed mime-types.
98	* This is necessary because we need special handling for some of the
99	* mime-types. E.g. for URI lists we need to transfer the actual dirs and
100	* files. Text EOL may to be changed. Also unknown mime-types may need special
101	* handling as well, which may lead to undefined behavior in the host/guest, if
102	* not done.
103	*
104	* Dropping of a directory, means recursively transferring _all_ the content.
105	*
106	* Directories and files are placed into the user's temporary directory on the
107	* guest (e.g. /tmp/VirtualBox Dropped Files). We can't delete them after the
108	* DnD operation, because we didn't know what the DnD target does with it. E.g.
109	* it could just be opened in place. This could lead ofc to filling up the disk
110	* within the guest. To inform the user about this, a small app could be
111	* developed which scans this directory regularly and inform the user with a
112	* tray icon hint (and maybe the possibility to clean this up instantly). The
113	* same has to be done in the G->H direction when it is implemented.
114	*
115	* Only regular files are supported; symlinks are not allowed.
116	*
117	* Transfers currently are an all-succeed or all-fail operation (see todos).
118	*
119	* On MacOS hosts we had to implement own DnD "promises" support for file transfers,
120	* as Qt does not support this out-of-the-box.
121	*
122	* The code tries to preserve the file modes of the transfered directories / files.
123	* This is useful (and maybe necessary) for two things:
124	* 1. If a file is executable, it should be also after the transfer, so the
125	* user can just execute it, without manually tweaking the modes first.
126	* 2. If a dir/file is not accessible by group/others in the host, it shouldn't
127	* be in the guest.
128	* In any case, the user mode is always set to rwx (so that we can access it
129	* ourself, in e.g. for a cleanup case after cancel).
130	*
131	* ACEs / ACLs currently are not supported.
132	*
133	* Cancelling ongoing transfers is supported in both directions by the guest
134	* and/or host side and cleans up all previous steps. This also involves
135	* removing partially transferred directories / files in the temporary directory.
136	*
137	** @todo
138	* - ESC doesn't really work (on Windows guests it's already implemented)
139	* ... in any case it seems a little bit difficult to handle from the Qt side.
140	* - Transfers currently do not have any interactive (UI) callbacks / hooks which
141	* e.g. would allow to skip / replace / rename and entry, or abort the operation on failure.
142	* - Add support for more MIME types (especially images, csv)
143	* - Test unusual behavior:
144	* - DnD service crash in the guest during a DnD op (e.g. crash of VBoxClient or X11)
145	* - Not expected order of the events between HGCM and the guest
146	* - Security considerations: We transfer a lot of memory between the guest and
147	* the host and even allow the creation of dirs/files. Maybe there should be
148	* limits introduced to preventing DoS attacks or filling up all the memory
149	* (both in the host and the guest).
150	*/
151
152
153	/*********************************************************************************************************************************
154	* Internal macros. *
155	********************************************************************************************************************************/
156
157	/** Tries locking the GuestDnD object and returns on failure. */
158	#define GUESTDND_LOCK() \
159	{ \
160	int rcLock = RTCritSectEnter(&m_CritSect); \
161	if (RT_FAILURE(rcLock)) \
162	return rcLock; \
163	}
164
165	/** Tries locking the GuestDnD object and returns a_Ret failure. */
166	#define GUESTDND_LOCK_RET(a_Ret) \
167	{ \
168	int rcLock = RTCritSectEnter(&m_CritSect); \
169	if (RT_FAILURE(rcLock)) \
170	return a_Ret; \
171	}
172
173	/** Unlocks a formerly locked GuestDnD object. */
174	#define GUESTDND_UNLOCK() \
175	{ \
176	int rcUnlock = RTCritSectLeave(&m_CritSect); RT_NOREF(rcUnlock); \
177	AssertRC(rcUnlock); \
178	}
179
180	/*********************************************************************************************************************************
181	* GuestDnDSendCtx implementation. *
182	********************************************************************************************************************************/
183
184	GuestDnDSendCtx::GuestDnDSendCtx(void)
185	: pTarget(NULL)
186	, pState(NULL)
187	{
188	reset();
189	}
190
191	/**
192	* Resets a GuestDnDSendCtx object.
193	*/
194	void GuestDnDSendCtx::reset(void)
195	{
196	if (pState)
197	pState->reset();
198
199	uScreenID = 0;
200
201	Transfer.reset();
202
203	int rc2 = EventCallback.Reset();
204	AssertRC(rc2);
205
206	GuestDnDData::reset();
207	}
208
209	/*********************************************************************************************************************************
210	* GuestDnDRecvCtx implementation. *
211	********************************************************************************************************************************/
212
213	GuestDnDRecvCtx::GuestDnDRecvCtx(void)
214	: pSource(NULL)
215	, pState(NULL)
216	{
217	reset();
218	}
219
220	/**
221	* Resets a GuestDnDRecvCtx object.
222	*/
223	void GuestDnDRecvCtx::reset(void)
224	{
225	if (pState)
226	pState->reset();
227
228	lstFmtOffered.clear();
229	strFmtReq = "";
230	strFmtRecv = "";
231	enmAction = 0;
232
233	Transfer.reset();
234
235	int rc2 = EventCallback.Reset();
236	AssertRC(rc2);
237
238	GuestDnDData::reset();
239	}
240
241	/*********************************************************************************************************************************
242	* GuestDnDCallbackEvent implementation. *
243	********************************************************************************************************************************/
244
245	GuestDnDCallbackEvent::~GuestDnDCallbackEvent(void)
246	{
247	if (NIL_RTSEMEVENT != m_SemEvent)
248	RTSemEventDestroy(m_SemEvent);
249	}
250
251	/**
252	* Resets a GuestDnDCallbackEvent object.
253	*/
254	int GuestDnDCallbackEvent::Reset(void)
255	{
256	int rc = VINF_SUCCESS;
257
258	if (NIL_RTSEMEVENT == m_SemEvent)
259	rc = RTSemEventCreate(&m_SemEvent);
260
261	m_Rc = VINF_SUCCESS;
262	return rc;
263	}
264
265	/**
266	* Completes a callback event by notifying the waiting side.
267	*
268	* @returns VBox status code.
269	* @param rc Result code to use for the event completion.
270	*/
271	int GuestDnDCallbackEvent::Notify(int rc /* = VINF_SUCCESS */)
272	{
273	m_Rc = rc;
274	return RTSemEventSignal(m_SemEvent);
275	}
276
277	/**
278	* Waits on a callback event for being notified.
279	*
280	* @returns VBox status code.
281	* @param msTimeout Timeout (in ms) to wait for callback event.
282	*/
283	int GuestDnDCallbackEvent::Wait(RTMSINTERVAL msTimeout)
284	{
285	return RTSemEventWait(m_SemEvent, msTimeout);
286	}
287
288	/********************************************************************************************************************************
289	*
290	********************************************************************************************************************************/
291
292	GuestDnDState::GuestDnDState(const ComObjPtr<Guest>& pGuest)
293	: m_uProtocolVersion(0)
294	, m_fGuestFeatures0(VBOX_DND_GF_NONE)
295	, m_EventSem(NIL_RTSEMEVENT)
296	, m_dndActionDefault(0)
297	, m_dndLstActionsAllowed(0)
298	, m_pParent(pGuest)
299	{
300	int rc = RTSemEventCreate(&m_EventSem);
301	if (RT_FAILURE(rc))
302	throw rc;
303	}
304
305	GuestDnDState::~GuestDnDState(void)
306	{
307	reset();
308
309	int rc = RTSemEventDestroy(m_EventSem);
310	AssertRC(rc);
311	}
312
313	/**
314	* Notifies the waiting side about a guest notification response.
315	*/
316	int GuestDnDState::notifyAboutGuestResponse(void) const
317	{
318	return RTSemEventSignal(m_EventSem);
319	}
320
321	/**
322	* Resets a GuestDnDResponse object.
323	*/
324	void GuestDnDState::reset(void)
325	{
326	LogFlowThisFuncEnter();
327
328	m_dndActionDefault = 0;
329	m_dndLstActionsAllowed = 0;
330
331	m_lstFormats.clear();
332	}
333
334	/**
335	* Resets the progress object.
336	*
337	* @returns HRESULT
338	* @param pParent Parent to set for the progress object.
339	*/
340	HRESULT GuestDnDState::resetProgress(const ComObjPtr<Guest>& pParent)
341	{
342	m_pProgress.setNull();
343
344	HRESULT hr = m_pProgress.createObject();
345	if (SUCCEEDED(hr))
346	{
347	hr = m_pProgress->init(static_cast<IGuest *>(pParent),
348	Bstr(tr("Dropping data")).raw(),
349	TRUE /* aCancelable */);
350	}
351
352	return hr;
353	}
354
355	/**
356	* Returns whether the progress object has been canceled or not.
357	*
358	* @returns \c true if canceled, \c false if not.
359	*/
360	bool GuestDnDState::isProgressCanceled(void) const
361	{
362	BOOL fCanceled;
363	if (!m_pProgress.isNull())
364	{
365	HRESULT hr = m_pProgress->COMGETTER(Canceled)(&fCanceled);
366	AssertComRC(hr);
367	}
368	else
369	fCanceled = TRUE;
370
371	return RT_BOOL(fCanceled);
372	}
373
374	/**
375	* Sets a callback for a specific HGCM message.
376	*
377	* @returns VBox status code.
378	* @param uMsg HGCM message ID to set callback for.
379	* @param pfnCallback Callback function pointer to use.
380	* @param pvUser User-provided arguments for the callback function. Optional and can be NULL.
381	*/
382	int GuestDnDState::setCallback(uint32_t uMsg, PFNGUESTDNDCALLBACK pfnCallback, void pvUser / = NULL */)
383	{
384	GuestDnDCallbackMap::iterator it = m_mapCallbacks.find(uMsg);
385
386	/* Add. */
387	if (pfnCallback)
388	{
389	if (it == m_mapCallbacks.end())
390	{
391	m_mapCallbacks[uMsg] = GuestDnDCallback(pfnCallback, uMsg, pvUser);
392	return VINF_SUCCESS;
393	}
394
395	AssertMsgFailed(("Callback for message %RU32 already registered\n", uMsg));
396	return VERR_ALREADY_EXISTS;
397	}
398
399	/* Remove. */
400	if (it != m_mapCallbacks.end())
401	m_mapCallbacks.erase(it);
402
403	return VINF_SUCCESS;
404	}
405
406	/**
407	* Sets the progress object to a new state.
408	*
409	* @returns VBox status code.
410	* @param uPercentage Percentage (0-100) to set.
411	* @param uStatus Status (of type DND_PROGRESS_XXX) to set.
412	* @param rcOp IPRT-style result code to set. Optional.
413	* @param strMsg Message to set. Optional.
414	*/
415	int GuestDnDState::setProgress(unsigned uPercentage, uint32_t uStatus,
416	int rcOp /* = VINF_SUCCESS /, const Utf8Str &strMsg / = "" */)
417	{
418	LogFlowFunc(("uPercentage=%u, uStatus=%RU32, , rcOp=%Rrc, strMsg=%s\n",
419	uPercentage, uStatus, rcOp, strMsg.c_str()));
420
421	HRESULT hr = S_OK;
422
423	BOOL fCompleted = FALSE;
424	BOOL fCanceled = FALSE;
425
426	int rc = VINF_SUCCESS;
427
428	if (!m_pProgress.isNull())
429	{
430	hr = m_pProgress->COMGETTER(Completed)(&fCompleted);
431	AssertComRC(hr);
432
433	hr = m_pProgress->COMGETTER(Canceled)(&fCanceled);
434	AssertComRC(hr);
435
436	LogFlowFunc(("Progress fCompleted=%RTbool, fCanceled=%RTbool\n", fCompleted, fCanceled));
437	}
438
439	switch (uStatus)
440	{
441	case DragAndDropSvc::DND_PROGRESS_ERROR:
442	{
443	LogRel(("DnD: Guest reported error %Rrc\n", rcOp));
444
445	if ( !m_pProgress.isNull()
446	&& !fCompleted)
447	hr = m_pProgress->i_notifyComplete(VBOX_E_IPRT_ERROR,
448	COM_IIDOF(IGuest),
449	m_pParent->getComponentName(), strMsg.c_str());
450	reset();
451	break;
452	}
453
454	case DragAndDropSvc::DND_PROGRESS_CANCELLED:
455	{
456	LogRel2(("DnD: Guest cancelled operation\n"));
457
458	if ( !m_pProgress.isNull()
459	&& !fCompleted)
460	{
461	hr = m_pProgress->Cancel();
462	AssertComRC(hr);
463	hr = m_pProgress->i_notifyComplete(S_OK);
464	AssertComRC(hr);
465	}
466
467	reset();
468	break;
469	}
470
471	case DragAndDropSvc::DND_PROGRESS_RUNNING:
472	RT_FALL_THROUGH();
473	case DragAndDropSvc::DND_PROGRESS_COMPLETE:
474	{
475	LogRel2(("DnD: Guest reporting running/completion status with %u%%\n", uPercentage));
476
477	if ( !m_pProgress.isNull()
478	&& !fCompleted)
479	{
480	hr = m_pProgress->SetCurrentOperationProgress(uPercentage);
481	AssertComRC(hr);
482	if ( uStatus == DragAndDropSvc::DND_PROGRESS_COMPLETE
483	\|\| uPercentage >= 100)
484	{
485	hr = m_pProgress->i_notifyComplete(S_OK);
486	AssertComRC(hr);
487	}
488	}
489	break;
490	}
491
492	default:
493	break;
494	}
495
496	if (!m_pProgress.isNull())
497	{
498	hr = m_pProgress->COMGETTER(Completed)(&fCompleted);
499	AssertComRC(hr);
500	hr = m_pProgress->COMGETTER(Canceled)(&fCanceled);
501	AssertComRC(hr);
502
503	LogFlowFunc(("Progress fCompleted=%RTbool, fCanceled=%RTbool\n", fCompleted, fCanceled));
504	}
505
506	LogFlowFuncLeaveRC(rc);
507	return rc;
508	}
509
510	/**
511	* Dispatching function for handling the host service service callback.
512	*
513	* @returns VBox status code.
514	* @param u32Function HGCM message ID to handle.
515	* @param pvParms Pointer to optional data provided for a particular message. Optional.
516	* @param cbParms Size (in bytes) of \a pvParms.
517	*/
518	int GuestDnDState::onDispatch(uint32_t u32Function, void *pvParms, uint32_t cbParms)
519	{
520	LogFlowFunc(("u32Function=%RU32, pvParms=%p, cbParms=%RU32\n", u32Function, pvParms, cbParms));
521
522	int rc = VERR_WRONG_ORDER; /* Play safe. */
523
524	/* Whether or not to try calling host-installed callbacks after successfully processing the message. */
525	bool fTryCallbacks = false;
526
527	switch (u32Function)
528	{
529	case DragAndDropSvc::GUEST_DND_FN_CONNECT:
530	{
531	DragAndDropSvc::PVBOXDNDCBCONNECTDATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBCONNECTDATA>(pvParms);
532	AssertPtr(pCBData);
533	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBCONNECTDATA) == cbParms, VERR_INVALID_PARAMETER);
534	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_CONNECT == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
535
536	m_uProtocolVersion = pCBData->uProtocolVersion;
537	/** @todo Handle flags. */
538
539	LogThisFunc(("Client connected, using protocol v%RU32\n", m_uProtocolVersion));
540
541	rc = VINF_SUCCESS;
542	break;
543	}
544
545	case DragAndDropSvc::GUEST_DND_FN_REPORT_FEATURES:
546	{
547	DragAndDropSvc::PVBOXDNDCBREPORTFEATURESDATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBREPORTFEATURESDATA>(pvParms);
548	AssertPtr(pCBData);
549	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBREPORTFEATURESDATA) == cbParms, VERR_INVALID_PARAMETER);
550	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_REPORT_FEATURES == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
551
552	m_fGuestFeatures0 = pCBData->fGuestFeatures0;
553
554	LogThisFunc(("Client reported features: %#RX64\n", m_fGuestFeatures0));
555
556	rc = VINF_SUCCESS;
557	break;
558	}
559
560	case DragAndDropSvc::GUEST_DND_FN_DISCONNECT:
561	{
562	LogThisFunc(("Client disconnected\n"));
563	rc = setProgress(100, DND_PROGRESS_CANCELLED, VINF_SUCCESS);
564	break;
565	}
566
567	case DragAndDropSvc::GUEST_DND_FN_HG_ACK_OP:
568	{
569	DragAndDropSvc::PVBOXDNDCBHGACKOPDATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBHGACKOPDATA>(pvParms);
570	AssertPtr(pCBData);
571	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBHGACKOPDATA) == cbParms, VERR_INVALID_PARAMETER);
572	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_HG_ACK_OP == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
573
574	setActionDefault(pCBData->uAction);
575	rc = notifyAboutGuestResponse();
576	break;
577	}
578
579	case DragAndDropSvc::GUEST_DND_FN_HG_REQ_DATA:
580	{
581	DragAndDropSvc::PVBOXDNDCBHGREQDATADATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBHGREQDATADATA>(pvParms);
582	AssertPtr(pCBData);
583	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBHGREQDATADATA) == cbParms, VERR_INVALID_PARAMETER);
584	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_HG_REQ_DATA == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
585
586	if ( pCBData->cbFormat == 0
587	\|\| pCBData->cbFormat > _64K /** @todo Make this configurable? */
588	\|\| pCBData->pszFormat == NULL)
589	{
590	rc = VERR_INVALID_PARAMETER;
591	}
592	else if (!RTStrIsValidEncoding(pCBData->pszFormat))
593	{
594	rc = VERR_INVALID_PARAMETER;
595	}
596	else
597	{
598	setFormats(GuestDnD::toFormatList(pCBData->pszFormat));
599	rc = VINF_SUCCESS;
600	}
601
602	int rc2 = notifyAboutGuestResponse();
603	if (RT_SUCCESS(rc))
604	rc = rc2;
605	break;
606	}
607
608	case DragAndDropSvc::GUEST_DND_FN_HG_EVT_PROGRESS:
609	{
610	DragAndDropSvc::PVBOXDNDCBHGEVTPROGRESSDATA pCBData =
611	reinterpret_cast<DragAndDropSvc::PVBOXDNDCBHGEVTPROGRESSDATA>(pvParms);
612	AssertPtr(pCBData);
613	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBHGEVTPROGRESSDATA) == cbParms, VERR_INVALID_PARAMETER);
614	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_HG_EVT_PROGRESS == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
615
616	rc = setProgress(pCBData->uPercentage, pCBData->uStatus, pCBData->rc);
617	if (RT_SUCCESS(rc))
618	rc = notifyAboutGuestResponse();
619	break;
620	}
621	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
622	case DragAndDropSvc::GUEST_DND_FN_GH_ACK_PENDING:
623	{
624	DragAndDropSvc::PVBOXDNDCBGHACKPENDINGDATA pCBData =
625	reinterpret_cast<DragAndDropSvc::PVBOXDNDCBGHACKPENDINGDATA>(pvParms);
626	AssertPtr(pCBData);
627	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBGHACKPENDINGDATA) == cbParms, VERR_INVALID_PARAMETER);
628	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_GH_ACK_PENDING == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
629
630	if ( pCBData->cbFormat == 0
631	\|\| pCBData->cbFormat > _64K /** @todo Make the maximum size configurable? */
632	\|\| pCBData->pszFormat == NULL)
633	{
634	rc = VERR_INVALID_PARAMETER;
635	}
636	else if (!RTStrIsValidEncoding(pCBData->pszFormat))
637	{
638	rc = VERR_INVALID_PARAMETER;
639	}
640	else
641	{
642	setFormats (GuestDnD::toFormatList(pCBData->pszFormat));
643	setActionDefault (pCBData->uDefAction);
644	setActionsAllowed(pCBData->uAllActions);
645
646	rc = VINF_SUCCESS;
647	}
648
649	int rc2 = notifyAboutGuestResponse();
650	if (RT_SUCCESS(rc))
651	rc = rc2;
652	break;
653	}
654	#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
655	default:
656	/* * Try if the event is covered by a registered callback. */
657	fTryCallbacks = true;
658	break;
659	}
660
661	/*
662	* Try the host's installed callbacks (if any).
663	*/
664	if (fTryCallbacks)
665	{
666	GuestDnDCallbackMap::const_iterator it = m_mapCallbacks.find(u32Function);
667	if (it != m_mapCallbacks.end())
668	{
669	AssertPtr(it->second.pfnCallback);
670	rc = it->second.pfnCallback(u32Function, pvParms, cbParms, it->second.pvUser);
671	}
672	else
673	{
674	LogFlowFunc(("No callback for function %RU32 defined (%zu callbacks total)\n", u32Function, m_mapCallbacks.size()));
675	rc = VERR_NOT_SUPPORTED; /* Tell the guest. */
676	}
677	}
678
679	LogFlowFunc(("Returning rc=%Rrc\n", rc));
680	return rc;
681	}
682
683	/**
684	* Helper function to query the internal progress object to an IProgress interface.
685	*
686	* @returns HRESULT
687	* @param ppProgress Where to query the progress object to.
688	*/
689	HRESULT GuestDnDState::queryProgressTo(IProgress **ppProgress)
690	{
691	return m_pProgress.queryInterfaceTo(ppProgress);
692	}
693
694	/**
695	* Waits for a guest response to happen.
696	*
697	* @returns VBox status code.
698	* @param msTimeout Timeout (in ms) for waiting. Optional, waits 500 ms if not specified.
699	*/
700	int GuestDnDState::waitForGuestResponse(RTMSINTERVAL msTimeout /= 500 /) const
701	{
702	int rc = RTSemEventWait(m_EventSem, msTimeout);
703	#ifdef DEBUG_andy
704	LogFlowFunc(("msTimeout=%RU32, rc=%Rrc\n", msTimeout, rc));
705	#endif
706	return rc;
707	}
708
709	/*********************************************************************************************************************************
710	* GuestDnD implementation. *
711	********************************************************************************************************************************/
712
713	/** Static (Singleton) instance of the GuestDnD object. */
714	GuestDnD* GuestDnD::s_pInstance = NULL;
715
716	GuestDnD::GuestDnD(const ComObjPtr<Guest> &pGuest)
717	: m_pGuest(pGuest)
718	, m_cTransfersPending(0)
719	{
720	LogFlowFuncEnter();
721
722	try
723	{
724	m_pState = new GuestDnDState(pGuest);
725	}
726	catch (std::bad_alloc &)
727	{
728	throw VERR_NO_MEMORY;
729	}
730
731	int rc = RTCritSectInit(&m_CritSect);
732	if (RT_FAILURE(rc))
733	throw rc;
734
735	/* List of supported default MIME types. */
736	LogRel2(("DnD: Supported default host formats:\n"));
737	const com::Utf8Str arrEntries[] = { VBOX_DND_FORMATS_DEFAULT };
738	for (size_t i = 0; i < RT_ELEMENTS(arrEntries); i++)
739	{
740	m_strDefaultFormats.push_back(arrEntries[i]);
741	LogRel2(("DnD: \t%s\n", arrEntries[i].c_str()));
742	}
743	}
744
745	GuestDnD::~GuestDnD(void)
746	{
747	LogFlowFuncEnter();
748
749	Assert(m_cTransfersPending == 0); /* Sanity. */
750
751	RTCritSectDelete(&m_CritSect);
752
753	if (m_pState)
754	delete m_pState;
755	}
756
757	/**
758	* Adjusts coordinations to a given screen.
759	*
760	* @returns HRESULT
761	* @param uScreenId ID of screen to adjust coordinates to.
762	* @param puX Pointer to X coordinate to adjust. Will return the adjusted value on success.
763	* @param puY Pointer to Y coordinate to adjust. Will return the adjusted value on success.
764	*/
765	HRESULT GuestDnD::adjustScreenCoordinates(ULONG uScreenId, ULONG puX, ULONG puY) const
766	{
767	/** @todo r=andy Save the current screen's shifting coordinates to speed things up.
768	* Only query for new offsets when the screen ID or the screen's resolution has changed. */
769
770	/* For multi-monitor support we need to add shift values to the coordinates
771	* (depending on the screen number). */
772	ComObjPtr<Console> pConsole = m_pGuest->i_getConsole();
773	ComPtr<IDisplay> pDisplay;
774	HRESULT hr = pConsole->COMGETTER(Display)(pDisplay.asOutParam());
775	if (FAILED(hr))
776	return hr;
777
778	ULONG dummy;
779	LONG xShift, yShift;
780	GuestMonitorStatus_T monitorStatus;
781	hr = pDisplay->GetScreenResolution(uScreenId, &dummy, &dummy, &dummy,
782	&xShift, &yShift, &monitorStatus);
783	if (FAILED(hr))
784	return hr;
785
786	if (puX)
787	*puX += xShift;
788	if (puY)
789	*puY += yShift;
790
791	LogFlowFunc(("uScreenId=%RU32, x=%RU32, y=%RU32\n", uScreenId, puX ? puX : 0, puY ? puY : 0));
792	return S_OK;
793	}
794
795	/**
796	* Returns a DnD guest state.
797	*
798	* @returns Pointer to DnD guest state, or NULL if not found / invalid.
799	* @param uID ID of DnD guest state to return.
800	*/
801	GuestDnDState GuestDnD::getState(uint32_t uID / = 0 */) const
802	{
803	AssertMsgReturn(uID == 0, ("Only one state (0) is supported at the moment\n"), NULL);
804
805	return m_pState;
806	}
807
808	/**
809	* Sends a (blocking) message to the host side of the host service.
810	*
811	* @returns VBox status code.
812	* @param u32Function HGCM message ID to send.
813	* @param cParms Number of parameters to send.
814	* @param paParms Array of parameters to send. Must match \c cParms.
815	*/
816	int GuestDnD::hostCall(uint32_t u32Function, uint32_t cParms, PVBOXHGCMSVCPARM paParms) const
817	{
818	Assert(!m_pGuest.isNull());
819	ComObjPtr<Console> pConsole = m_pGuest->i_getConsole();
820
821	/* Forward the information to the VMM device. */
822	Assert(!pConsole.isNull());
823	VMMDev *pVMMDev = pConsole->i_getVMMDev();
824	if (!pVMMDev)
825	return VERR_COM_OBJECT_NOT_FOUND;
826
827	return pVMMDev->hgcmHostCall("VBoxDragAndDropSvc", u32Function, cParms, paParms);
828	}
829
830	/**
831	* Registers a GuestDnDSource object with the GuestDnD manager.
832	*
833	* Currently only one source is supported at a time.
834	*
835	* @returns VBox status code.
836	* @param Source Source to register.
837	*/
838	int GuestDnD::registerSource(const ComObjPtr<GuestDnDSource> &Source)
839	{
840	GUESTDND_LOCK();
841
842	Assert(m_lstSrc.size() == 0); /* We only support one source at a time at the moment. */
843	m_lstSrc.push_back(Source);
844
845	GUESTDND_UNLOCK();
846	return VINF_SUCCESS;
847	}
848
849	/**
850	* Unregisters a GuestDnDSource object from the GuestDnD manager.
851	*
852	* @returns VBox status code.
853	* @param Source Source to unregister.
854	*/
855	int GuestDnD::unregisterSource(const ComObjPtr<GuestDnDSource> &Source)
856	{
857	GUESTDND_LOCK();
858
859	GuestDnDSrcList::iterator itSrc = std::find(m_lstSrc.begin(), m_lstSrc.end(), Source);
860	if (itSrc != m_lstSrc.end())
861	m_lstSrc.erase(itSrc);
862
863	GUESTDND_UNLOCK();
864	return VINF_SUCCESS;
865	}
866
867	/**
868	* Returns the current number of registered sources.
869	*
870	* @returns Current number of registered sources.
871	*/
872	size_t GuestDnD::getSourceCount(void)
873	{
874	GUESTDND_LOCK_RET(0);
875
876	size_t cSources = m_lstSrc.size();
877
878	GUESTDND_UNLOCK();
879	return cSources;
880	}
881
882	/**
883	* Registers a GuestDnDTarget object with the GuestDnD manager.
884	*
885	* Currently only one target is supported at a time.
886	*
887	* @returns VBox status code.
888	* @param Target Target to register.
889	*/
890	int GuestDnD::registerTarget(const ComObjPtr<GuestDnDTarget> &Target)
891	{
892	GUESTDND_LOCK();
893
894	Assert(m_lstTgt.size() == 0); /* We only support one target at a time at the moment. */
895	m_lstTgt.push_back(Target);
896
897	GUESTDND_UNLOCK();
898	return VINF_SUCCESS;
899	}
900
901	/**
902	* Unregisters a GuestDnDTarget object from the GuestDnD manager.
903	*
904	* @returns VBox status code.
905	* @param Target Target to unregister.
906	*/
907	int GuestDnD::unregisterTarget(const ComObjPtr<GuestDnDTarget> &Target)
908	{
909	GUESTDND_LOCK();
910
911	GuestDnDTgtList::iterator itTgt = std::find(m_lstTgt.begin(), m_lstTgt.end(), Target);
912	if (itTgt != m_lstTgt.end())
913	m_lstTgt.erase(itTgt);
914
915	GUESTDND_UNLOCK();
916	return VINF_SUCCESS;
917	}
918
919	/**
920	* Returns the current number of registered targets.
921	*
922	* @returns Current number of registered targets.
923	*/
924	size_t GuestDnD::getTargetCount(void)
925	{
926	GUESTDND_LOCK_RET(0);
927
928	size_t cTargets = m_lstTgt.size();
929
930	GUESTDND_UNLOCK();
931	return cTargets;
932	}
933
934	/**
935	* Static main dispatcher function to handle callbacks from the DnD host service.
936	*
937	* @returns VBox status code.
938	* @param pvExtension Pointer to service extension.
939	* @param u32Function Callback HGCM message ID.
940	* @param pvParms Pointer to optional data provided for a particular message. Optional.
941	* @param cbParms Size (in bytes) of \a pvParms.
942	*/
943	/* static */
944	DECLCALLBACK(int) GuestDnD::notifyDnDDispatcher(void *pvExtension, uint32_t u32Function,
945	void *pvParms, uint32_t cbParms)
946	{
947	LogFlowFunc(("pvExtension=%p, u32Function=%RU32, pvParms=%p, cbParms=%RU32\n",
948	pvExtension, u32Function, pvParms, cbParms));
949
950	GuestDnD pGuestDnD = reinterpret_cast<GuestDnD>(pvExtension);
951	AssertPtrReturn(pGuestDnD, VERR_INVALID_POINTER);
952
953	/** @todo In case we need to handle multiple guest DnD responses at a time this
954	* would be the place to lookup and dispatch to those. For the moment we
955	* only have one response -- simple. */
956	if (pGuestDnD->m_pState)
957	return pGuestDnD->m_pState->onDispatch(u32Function, pvParms, cbParms);
958
959	return VERR_NOT_SUPPORTED;
960	}
961
962	/**
963	* Static helper function to determine whether a format is part of a given MIME list.
964	*
965	* @returns \c true if found, \c false if not.
966	* @param strFormat Format to search for.
967	* @param lstFormats MIME list to search in.
968	*/
969	/* static */
970	bool GuestDnD::isFormatInFormatList(const com::Utf8Str &strFormat, const GuestDnDMIMEList &lstFormats)
971	{
972	return std::find(lstFormats.begin(), lstFormats.end(), strFormat) != lstFormats.end();
973	}
974
975	/**
976	* Static helper function to create a GuestDnDMIMEList out of a format list string.
977	*
978	* @returns MIME list object.
979	* @param strFormats List of formats to convert.
980	* @param strSep Separator to use. If not specified, DND_FORMATS_SEPARATOR_STR will be used.
981	*/
982	/* static */
983	GuestDnDMIMEList GuestDnD::toFormatList(const com::Utf8Str &strFormats, const com::Utf8Str &strSep /* = DND_FORMATS_SEPARATOR_STR */)
984	{
985	GuestDnDMIMEList lstFormats;
986	RTCList<RTCString> lstFormatsTmp = strFormats.split(strSep);
987
988	for (size_t i = 0; i < lstFormatsTmp.size(); i++)
989	lstFormats.push_back(com::Utf8Str(lstFormatsTmp.at(i)));
990
991	return lstFormats;
992	}
993
994	/**
995	* Static helper function to create a format list string from a given GuestDnDMIMEList object.
996	*
997	* @returns Format list string.
998	* @param lstFormats GuestDnDMIMEList to convert.
999	*/
1000	/* static */
1001	com::Utf8Str GuestDnD::toFormatString(const GuestDnDMIMEList &lstFormats)
1002	{
1003	com::Utf8Str strFormat;
1004	for (size_t i = 0; i < lstFormats.size(); i++)
1005	{
1006	const com::Utf8Str &f = lstFormats.at(i);
1007	strFormat += f + DND_FORMATS_SEPARATOR_STR;
1008	}
1009
1010	return strFormat;
1011	}
1012
1013	/**
1014	* Static helper function to create a filtered GuestDnDMIMEList object from supported and wanted formats.
1015	*
1016	* @returns Filtered MIME list object.
1017	* @param lstFormatsSupported MIME list of supported formats.
1018	* @param lstFormatsWanted MIME list of wanted formats in returned object.
1019	*/
1020	/* static */
1021	GuestDnDMIMEList GuestDnD::toFilteredFormatList(const GuestDnDMIMEList &lstFormatsSupported, const GuestDnDMIMEList &lstFormatsWanted)
1022	{
1023	GuestDnDMIMEList lstFormats;
1024
1025	for (size_t i = 0; i < lstFormatsWanted.size(); i++)
1026	{
1027	/* Only keep supported format types. */
1028	if (std::find(lstFormatsSupported.begin(),
1029	lstFormatsSupported.end(), lstFormatsWanted.at(i)) != lstFormatsSupported.end())
1030	{
1031	lstFormats.push_back(lstFormatsWanted[i]);
1032	}
1033	}
1034
1035	return lstFormats;
1036	}
1037
1038	/**
1039	* Static helper function to create a filtered GuestDnDMIMEList object from supported and wanted formats.
1040	*
1041	* @returns Filtered MIME list object.
1042	* @param lstFormatsSupported MIME list of supported formats.
1043	* @param strFormatsWanted Format list string of wanted formats in returned object.
1044	*/
1045	/* static */
1046	GuestDnDMIMEList GuestDnD::toFilteredFormatList(const GuestDnDMIMEList &lstFormatsSupported, const com::Utf8Str &strFormatsWanted)
1047	{
1048	GuestDnDMIMEList lstFmt;
1049
1050	RTCList<RTCString> lstFormats = strFormatsWanted.split(DND_FORMATS_SEPARATOR_STR);
1051	size_t i = 0;
1052	while (i < lstFormats.size())
1053	{
1054	/* Only keep allowed format types. */
1055	if (std::find(lstFormatsSupported.begin(),
1056	lstFormatsSupported.end(), lstFormats.at(i)) != lstFormatsSupported.end())
1057	{
1058	lstFmt.push_back(lstFormats[i]);
1059	}
1060	i++;
1061	}
1062
1063	return lstFmt;
1064	}
1065
1066	/**
1067	* Static helper function to convert a Main DnD action an internal DnD action.
1068	*
1069	* @returns Internal DnD action, or VBOX_DND_ACTION_IGNORE if not found / supported.
1070	* @param enmAction Main DnD action to convert.
1071	*/
1072	/* static */
1073	VBOXDNDACTION GuestDnD::toHGCMAction(DnDAction_T enmAction)
1074	{
1075	VBOXDNDACTION dndAction = VBOX_DND_ACTION_IGNORE;
1076	switch (enmAction)
1077	{
1078	case DnDAction_Copy:
1079	dndAction = VBOX_DND_ACTION_COPY;
1080	break;
1081	case DnDAction_Move:
1082	dndAction = VBOX_DND_ACTION_MOVE;
1083	break;
1084	case DnDAction_Link:
1085	/* For now it doesn't seems useful to allow a link
1086	action between host & guest. Later? */
1087	case DnDAction_Ignore:
1088	/* Ignored. */
1089	break;
1090	default:
1091	AssertMsgFailed(("Action %RU32 not recognized!\n", enmAction));
1092	break;
1093	}
1094
1095	return dndAction;
1096	}
1097
1098	/**
1099	* Static helper function to convert a Main DnD default action and allowed Main actions to their
1100	* corresponding internal representations.
1101	*
1102	* @param enmDnDActionDefault Default Main action to convert.
1103	* @param pDnDActionDefault Where to store the converted default action.
1104	* @param vecDnDActionsAllowed Allowed Main actions to convert.
1105	* @param pDnDLstActionsAllowed Where to store the converted allowed actions.
1106	*/
1107	/* static */
1108	void GuestDnD::toHGCMActions(DnDAction_T enmDnDActionDefault,
1109	VBOXDNDACTION *pDnDActionDefault,
1110	const std::vector<DnDAction_T> vecDnDActionsAllowed,
1111	VBOXDNDACTIONLIST *pDnDLstActionsAllowed)
1112	{
1113	VBOXDNDACTIONLIST dndLstActionsAllowed = VBOX_DND_ACTION_IGNORE;
1114	VBOXDNDACTION dndActionDefault = toHGCMAction(enmDnDActionDefault);
1115
1116	if (!vecDnDActionsAllowed.empty())
1117	{
1118	/* First convert the allowed actions to a bit array. */
1119	for (size_t i = 0; i < vecDnDActionsAllowed.size(); i++)
1120	dndLstActionsAllowed \|= toHGCMAction(vecDnDActionsAllowed[i]);
1121
1122	/*
1123	* If no default action is set (ignoring), try one of the
1124	* set allowed actions, preferring copy, move (in that order).
1125	*/
1126	if (isDnDIgnoreAction(dndActionDefault))
1127	{
1128	if (hasDnDCopyAction(dndLstActionsAllowed))
1129	dndActionDefault = VBOX_DND_ACTION_COPY;
1130	else if (hasDnDMoveAction(dndLstActionsAllowed))
1131	dndActionDefault = VBOX_DND_ACTION_MOVE;
1132	}
1133	}
1134
1135	if (pDnDActionDefault)
1136	*pDnDActionDefault = dndActionDefault;
1137	if (pDnDLstActionsAllowed)
1138	*pDnDLstActionsAllowed = dndLstActionsAllowed;
1139	}
1140
1141	/**
1142	* Static helper function to convert an internal DnD action to its Main representation.
1143	*
1144	* @returns Converted Main DnD action.
1145	* @param dndAction DnD action to convert.
1146	*/
1147	/* static */
1148	DnDAction_T GuestDnD::toMainAction(VBOXDNDACTION dndAction)
1149	{
1150	/* For now it doesn't seems useful to allow a
1151	* link action between host & guest. Maybe later! */
1152	return isDnDCopyAction(dndAction) ? DnDAction_Copy
1153	: isDnDMoveAction(dndAction) ? DnDAction_Move
1154	: DnDAction_Ignore;
1155	}
1156
1157	/**
1158	* Static helper function to convert an internal DnD action list to its Main representation.
1159	*
1160	* @returns Converted Main DnD action list.
1161	* @param dndActionList DnD action list to convert.
1162	*/
1163	/* static */
1164	std::vector<DnDAction_T> GuestDnD::toMainActions(VBOXDNDACTIONLIST dndActionList)
1165	{
1166	std::vector<DnDAction_T> vecActions;
1167
1168	/* For now it doesn't seems useful to allow a
1169	* link action between host & guest. Maybe later! */
1170	RTCList<DnDAction_T> lstActions;
1171	if (hasDnDCopyAction(dndActionList))
1172	lstActions.append(DnDAction_Copy);
1173	if (hasDnDMoveAction(dndActionList))
1174	lstActions.append(DnDAction_Move);
1175
1176	for (size_t i = 0; i < lstActions.size(); ++i)
1177	vecActions.push_back(lstActions.at(i));
1178
1179	return vecActions;
1180	}
1181
1182	/*********************************************************************************************************************************
1183	* GuestDnDBase implementation. *
1184	********************************************************************************************************************************/
1185
1186	GuestDnDBase::GuestDnDBase(void)
1187	: m_fIsPending(false)
1188	{
1189	/* Initialize public attributes. */
1190	m_lstFmtSupported = GuestDnDInst()->defaultFormats();
1191	}
1192
1193	/**
1194	* Checks whether a given DnD format is supported or not.
1195	*
1196	* @returns \c true if supported, \c false if not.
1197	* @param aFormat DnD format to check.
1198	*/
1199	bool GuestDnDBase::i_isFormatSupported(const com::Utf8Str &aFormat) const
1200	{
1201	return std::find(m_lstFmtSupported.begin(), m_lstFmtSupported.end(), aFormat) != m_lstFmtSupported.end();
1202	}
1203
1204	/**
1205	* Returns the currently supported DnD formats.
1206	*
1207	* @returns List of the supported DnD formats.
1208	*/
1209	const GuestDnDMIMEList &GuestDnDBase::i_getFormats(void) const
1210	{
1211	return m_lstFmtSupported;
1212	}
1213
1214	/**
1215	* Adds DnD formats to the supported formats list.
1216	*
1217	* @returns HRESULT
1218	* @param aFormats List of DnD formats to add.
1219	*/
1220	HRESULT GuestDnDBase::i_addFormats(const GuestDnDMIMEList &aFormats)
1221	{
1222	for (size_t i = 0; i < aFormats.size(); ++i)
1223	{
1224	Utf8Str strFormat = aFormats.at(i);
1225	if (std::find(m_lstFmtSupported.begin(),
1226	m_lstFmtSupported.end(), strFormat) == m_lstFmtSupported.end())
1227	{
1228	m_lstFmtSupported.push_back(strFormat);
1229	}
1230	}
1231
1232	return S_OK;
1233	}
1234
1235	/**
1236	* Removes DnD formats from tehh supported formats list.
1237	*
1238	* @returns HRESULT
1239	* @param aFormats List of DnD formats to remove.
1240	*/
1241	HRESULT GuestDnDBase::i_removeFormats(const GuestDnDMIMEList &aFormats)
1242	{
1243	for (size_t i = 0; i < aFormats.size(); ++i)
1244	{
1245	Utf8Str strFormat = aFormats.at(i);
1246	GuestDnDMIMEList::iterator itFormat = std::find(m_lstFmtSupported.begin(),
1247	m_lstFmtSupported.end(), strFormat);
1248	if (itFormat != m_lstFmtSupported.end())
1249	m_lstFmtSupported.erase(itFormat);
1250	}
1251
1252	return S_OK;
1253	}
1254
1255	/**
1256	* Adds a new guest DnD message to the internal message queue.
1257	*
1258	* @returns VBox status code.
1259	* @param pMsg Pointer to message to add.
1260	*/
1261	int GuestDnDBase::msgQueueAdd(GuestDnDMsg *pMsg)
1262	{
1263	m_DataBase.lstMsgOut.push_back(pMsg);
1264	return VINF_SUCCESS;
1265	}
1266
1267	/**
1268	* Returns the next guest DnD message in the internal message queue (FIFO).
1269	*
1270	* @returns Pointer to guest DnD message, or NULL if none found.
1271	*/
1272	GuestDnDMsg *GuestDnDBase::msgQueueGetNext(void)
1273	{
1274	if (m_DataBase.lstMsgOut.empty())
1275	return NULL;
1276	return m_DataBase.lstMsgOut.front();
1277	}
1278
1279	/**
1280	* Removes the next guest DnD message from the internal message queue.
1281	*/
1282	void GuestDnDBase::msgQueueRemoveNext(void)
1283	{
1284	if (!m_DataBase.lstMsgOut.empty())
1285	{
1286	GuestDnDMsg *pMsg = m_DataBase.lstMsgOut.front();
1287	if (pMsg)
1288	delete pMsg;
1289	m_DataBase.lstMsgOut.pop_front();
1290	}
1291	}
1292
1293	/**
1294	* Clears the internal message queue.
1295	*/
1296	void GuestDnDBase::msgQueueClear(void)
1297	{
1298	LogFlowFunc(("cMsg=%zu\n", m_DataBase.lstMsgOut.size()));
1299
1300	GuestDnDMsgList::iterator itMsg = m_DataBase.lstMsgOut.begin();
1301	while (itMsg != m_DataBase.lstMsgOut.end())
1302	{
1303	GuestDnDMsg pMsg = itMsg;
1304	if (pMsg)
1305	delete pMsg;
1306
1307	itMsg++;
1308	}
1309
1310	m_DataBase.lstMsgOut.clear();
1311	}
1312
1313	/**
1314	* Sends a request to the guest side to cancel the current DnD operation.
1315	*
1316	* @returns VBox status code.
1317	*/
1318	int GuestDnDBase::sendCancel(void)
1319	{
1320	GuestDnDMsg Msg;
1321	Msg.setType(HOST_DND_FN_CANCEL);
1322	if (m_pState->m_uProtocolVersion >= 3)
1323	Msg.appendUInt32(0); /** @todo ContextID not used yet. */
1324
1325	LogRel2(("DnD: Cancelling operation on guest ...\n"));
1326
1327	int rc = GuestDnDInst()->hostCall(Msg.getType(), Msg.getCount(), Msg.getParms());
1328	if (RT_FAILURE(rc))
1329	LogRel(("DnD: Cancelling operation on guest failed with %Rrc\n", rc));
1330
1331	return rc;
1332	}
1333
1334	/**
1335	* Helper function to update the progress based on given a GuestDnDData object.
1336	*
1337	* @returns VBox status code.
1338	* @param pData GuestDnDData object to use for accounting.
1339	* @param pState Guest state to update its progress object for.
1340	* @param cbDataAdd By how much data (in bytes) to update the progress.
1341	*/
1342	int GuestDnDBase::updateProgress(GuestDnDData pData, GuestDnDState pState,
1343	size_t cbDataAdd /* = 0 */)
1344	{
1345	AssertPtrReturn(pData, VERR_INVALID_POINTER);
1346	AssertPtrReturn(pState, VERR_INVALID_POINTER);
1347	/* cbDataAdd is optional. */
1348
1349	LogFlowFunc(("cbExtra=%zu, cbProcessed=%zu, cbRemaining=%zu, cbDataAdd=%zu\n",
1350	pData->cbExtra, pData->cbProcessed, pData->getRemaining(), cbDataAdd));
1351
1352	if ( !pState
1353	\|\| !cbDataAdd) /* Only update if something really changes. */
1354	return VINF_SUCCESS;
1355
1356	if (cbDataAdd)
1357	pData->addProcessed(cbDataAdd);
1358
1359	const uint8_t uPercent = pData->getPercentComplete();
1360
1361	LogRel2(("DnD: Transfer %RU8%% complete\n", uPercent));
1362
1363	int rc = pState->setProgress(uPercent,
1364	pData->isComplete()
1365	? DND_PROGRESS_COMPLETE
1366	: DND_PROGRESS_RUNNING);
1367	LogFlowFuncLeaveRC(rc);
1368	return rc;
1369	}
1370
1371	/**
1372	* Waits for a specific guest callback event to get signalled.
1373	*
1374	* @returns VBox status code. Will return VERR_CANCELLED if the user has cancelled the progress object.
1375	* @param pEvent Callback event to wait for.
1376	* @param pState Guest state to update.
1377	* @param msTimeout Timeout (in ms) to wait.
1378	*/
1379	int GuestDnDBase::waitForEvent(GuestDnDCallbackEvent pEvent, GuestDnDState pState, RTMSINTERVAL msTimeout)
1380	{
1381	AssertPtrReturn(pEvent, VERR_INVALID_POINTER);
1382	AssertPtrReturn(pState, VERR_INVALID_POINTER);
1383
1384	int rc;
1385
1386	LogFlowFunc(("msTimeout=%RU32\n", msTimeout));
1387
1388	uint64_t tsStart = RTTimeMilliTS();
1389	do
1390	{
1391	/*
1392	* Wait until our desired callback triggered the
1393	* wait event. As we don't want to block if the guest does not
1394	* respond, do busy waiting here.
1395	*/
1396	rc = pEvent->Wait(500 /* ms */);
1397	if (RT_SUCCESS(rc))
1398	{
1399	rc = pEvent->Result();
1400	LogFlowFunc(("Callback done, result is %Rrc\n", rc));
1401	break;
1402	}
1403	else if (rc == VERR_TIMEOUT) /* Continue waiting. */
1404	rc = VINF_SUCCESS;
1405
1406	if ( msTimeout != RT_INDEFINITE_WAIT
1407	&& RTTimeMilliTS() - tsStart > msTimeout)
1408	{
1409	rc = VERR_TIMEOUT;
1410	LogRel2(("DnD: Error: Guest did not respond within time\n"));
1411	}
1412	else if (pState->isProgressCanceled())
1413	{
1414	LogRel2(("DnD: Operation was canceled by user\n"));
1415	rc = VERR_CANCELLED;
1416	}
1417
1418	} while (RT_SUCCESS(rc));
1419
1420	LogFlowFuncLeaveRC(rc);
1421	return rc;
1422	}
1423	#endif /* VBOX_WITH_DRAG_AND_DROP */
1424

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source: vbox/trunk/src/VBox/Main/src-client/GuestDnDPrivate.cpp@ 93931

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