GuestDnDPrivate.cpp@ 97761

Last change on this file since 97761 was 97761, checked in by vboxsync, 2 years ago
DnD/Main: Don't set any (new) progress if the progress object already has been completed and/or cancelled [addendum to r154824].
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File size: 46.4 KB

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1	/* $Id: GuestDnDPrivate.cpp 97761 2022-12-07 15:57:36Z vboxsync $ */
2	/** @file
3	* Private guest drag and drop code, used by GuestDnDTarget + GuestDnDSource.
4	*/
5
6	/*
7	* Copyright (C) 2011-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	#define LOG_GROUP LOG_GROUP_GUEST_DND
29	#include "LoggingNew.h"
30
31	#include "GuestImpl.h"
32	#include "AutoCaller.h"
33
34	#ifdef VBOX_WITH_DRAG_AND_DROP
35	# include "ConsoleImpl.h"
36	# include "ProgressImpl.h"
37	# include "GuestDnDPrivate.h"
38
39	# include <algorithm>
40
41	# include <iprt/dir.h>
42	# include <iprt/path.h>
43	# include <iprt/stream.h>
44	# include <iprt/semaphore.h>
45	# include <iprt/cpp/utils.h>
46
47	# include <VMMDev.h>
48
49	# include <VBox/GuestHost/DragAndDrop.h>
50	# include <VBox/HostServices/DragAndDropSvc.h>
51	# include <VBox/version.h>
52
53	/** @page pg_main_dnd Dungeons & Dragons - Overview
54	* Overview:
55	*
56	* Drag and Drop is handled over the internal HGCM service for the host <->
57	* guest communication. Beside that we need to map the Drag and Drop protocols
58	* of the various OS's we support to our internal channels, this is also highly
59	* communicative in both directions. Unfortunately HGCM isn't really designed
60	* for that. Next we have to foul some of the components. This includes to
61	* trick X11 on the guest side, but also Qt needs to be tricked on the host
62	* side a little bit.
63	*
64	* The following components are involved:
65	*
66	* 1. GUI: Uses the Qt classes for Drag and Drop and mainly forward the content
67	* of it to the Main IGuest / IGuestDnDSource / IGuestDnDTarget interfaces.
68	* 2. Main: Public interface for doing Drag and Drop. Also manage the IProgress
69	* interfaces for blocking the caller by showing a progress dialog (see
70	* this file).
71	* 3. HGCM service: Handle all messages from the host to the guest at once and
72	* encapsulate the internal communication details (see dndmanager.cpp and
73	* friends).
74	* 4. Guest Additions: Split into the platform neutral part (see
75	* VBoxGuestR3LibDragAndDrop.cpp) and the guest OS specific parts.
76	* Receive/send message from/to the HGCM service and does all guest specific
77	* operations. For Windows guests VBoxTray is in charge, whereas on UNIX-y guests
78	* VBoxClient will be used.
79	*
80	* Terminology:
81	*
82	* All transfers contain a MIME format and according meta data. This meta data then can
83	* be interpreted either as raw meta data or something else. When raw meta data is
84	* being handled, this gets passed through to the destination (guest / host) without
85	* modification. Other meta data (like URI lists) can and will be modified by the
86	* receiving side before passing to OS. How and when modifications will be applied
87	* depends on the MIME format.
88	*
89	* Host -> Guest:
90	* 1. There are DnD Enter, Move, Leave events which are send exactly like this
91	* to the guest. The info includes the position, MIME types and allowed actions.
92	* The guest has to respond with an action it would accept, so the GUI could
93	* change the cursor accordingly.
94	* 2. On drop, first a drop event is sent. If this is accepted a drop data
95	* event follows. This blocks the GUI and shows some progress indicator.
96	*
97	* Guest -> Host:
98	* 1. The GUI is asking the guest if a DnD event is pending when the user moves
99	* the cursor out of the view window. If so, this returns the mimetypes and
100	* allowed actions.
101	* (2. On every mouse move this is asked again, to make sure the DnD event is
102	* still valid.)
103	* 3. On drop the host request the data from the guest. This blocks the GUI and
104	* shows some progress indicator.
105	*
106	* Implementation hints:
107	* m_strSupportedFormats here in this file defines the allowed mime-types.
108	* This is necessary because we need special handling for some of the
109	* mime-types. E.g. for URI lists we need to transfer the actual dirs and
110	* files. Text EOL may to be changed. Also unknown mime-types may need special
111	* handling as well, which may lead to undefined behavior in the host/guest, if
112	* not done.
113	*
114	* Dropping of a directory, means recursively transferring _all_ the content.
115	*
116	* Directories and files are placed into the user's temporary directory on the
117	* guest (e.g. /tmp/VirtualBox Dropped Files). We can't delete them after the
118	* DnD operation, because we didn't know what the DnD target does with it. E.g.
119	* it could just be opened in place. This could lead ofc to filling up the disk
120	* within the guest. To inform the user about this, a small app could be
121	* developed which scans this directory regularly and inform the user with a
122	* tray icon hint (and maybe the possibility to clean this up instantly). The
123	* same has to be done in the G->H direction when it is implemented.
124	*
125	* Only regular files are supported; symlinks are not allowed.
126	*
127	* Transfers currently are an all-succeed or all-fail operation (see todos).
128	*
129	* On MacOS hosts we had to implement own DnD "promises" support for file transfers,
130	* as Qt does not support this out-of-the-box.
131	*
132	* The code tries to preserve the file modes of the transfered directories / files.
133	* This is useful (and maybe necessary) for two things:
134	* 1. If a file is executable, it should be also after the transfer, so the
135	* user can just execute it, without manually tweaking the modes first.
136	* 2. If a dir/file is not accessible by group/others in the host, it shouldn't
137	* be in the guest.
138	* In any case, the user mode is always set to rwx (so that we can access it
139	* ourself, in e.g. for a cleanup case after cancel).
140	*
141	* ACEs / ACLs currently are not supported.
142	*
143	* Cancelling ongoing transfers is supported in both directions by the guest
144	* and/or host side and cleans up all previous steps. This also involves
145	* removing partially transferred directories / files in the temporary directory.
146	*
147	** @todo
148	* - ESC doesn't really work (on Windows guests it's already implemented)
149	* ... in any case it seems a little bit difficult to handle from the Qt side.
150	* - Transfers currently do not have any interactive (UI) callbacks / hooks which
151	* e.g. would allow to skip / replace / rename and entry, or abort the operation on failure.
152	* - Add support for more MIME types (especially images, csv)
153	* - Test unusual behavior:
154	* - DnD service crash in the guest during a DnD op (e.g. crash of VBoxClient or X11)
155	* - Not expected order of the events between HGCM and the guest
156	* - Security considerations: We transfer a lot of memory between the guest and
157	* the host and even allow the creation of dirs/files. Maybe there should be
158	* limits introduced to preventing DoS attacks or filling up all the memory
159	* (both in the host and the guest).
160	*/
161
162
163	/*********************************************************************************************************************************
164	* Internal macros. *
165	********************************************************************************************************************************/
166
167	/** Tries locking the GuestDnD object and returns on failure. */
168	#define GUESTDND_LOCK() \
169	{ \
170	int rcLock = RTCritSectEnter(&m_CritSect); \
171	if (RT_FAILURE(rcLock)) \
172	return rcLock; \
173	}
174
175	/** Tries locking the GuestDnD object and returns a_Ret failure. */
176	#define GUESTDND_LOCK_RET(a_Ret) \
177	{ \
178	int rcLock = RTCritSectEnter(&m_CritSect); \
179	if (RT_FAILURE(rcLock)) \
180	return a_Ret; \
181	}
182
183	/** Unlocks a formerly locked GuestDnD object. */
184	#define GUESTDND_UNLOCK() \
185	{ \
186	int rcUnlock = RTCritSectLeave(&m_CritSect); RT_NOREF(rcUnlock); \
187	AssertRC(rcUnlock); \
188	}
189
190	/*********************************************************************************************************************************
191	* GuestDnDSendCtx implementation. *
192	********************************************************************************************************************************/
193
194	GuestDnDSendCtx::GuestDnDSendCtx(void)
195	: pTarget(NULL)
196	, pState(NULL)
197	{
198	reset();
199	}
200
201	/**
202	* Resets a GuestDnDSendCtx object.
203	*/
204	void GuestDnDSendCtx::reset(void)
205	{
206	if (pState)
207	pState->reset();
208
209	uScreenID = 0;
210
211	Transfer.reset();
212
213	int rc2 = EventCallback.Reset();
214	AssertRC(rc2);
215
216	GuestDnDData::reset();
217	}
218
219	/*********************************************************************************************************************************
220	* GuestDnDRecvCtx implementation. *
221	********************************************************************************************************************************/
222
223	GuestDnDRecvCtx::GuestDnDRecvCtx(void)
224	: pSource(NULL)
225	, pState(NULL)
226	{
227	reset();
228	}
229
230	/**
231	* Resets a GuestDnDRecvCtx object.
232	*/
233	void GuestDnDRecvCtx::reset(void)
234	{
235	if (pState)
236	pState->reset();
237
238	lstFmtOffered.clear();
239	strFmtReq = "";
240	strFmtRecv = "";
241	enmAction = 0;
242
243	Transfer.reset();
244
245	int rc2 = EventCallback.Reset();
246	AssertRC(rc2);
247
248	GuestDnDData::reset();
249	}
250
251	/*********************************************************************************************************************************
252	* GuestDnDCallbackEvent implementation. *
253	********************************************************************************************************************************/
254
255	GuestDnDCallbackEvent::~GuestDnDCallbackEvent(void)
256	{
257	if (NIL_RTSEMEVENT != m_SemEvent)
258	RTSemEventDestroy(m_SemEvent);
259	}
260
261	/**
262	* Resets a GuestDnDCallbackEvent object.
263	*/
264	int GuestDnDCallbackEvent::Reset(void)
265	{
266	int rc = VINF_SUCCESS;
267
268	if (NIL_RTSEMEVENT == m_SemEvent)
269	rc = RTSemEventCreate(&m_SemEvent);
270
271	m_Rc = VINF_SUCCESS;
272	return rc;
273	}
274
275	/**
276	* Completes a callback event by notifying the waiting side.
277	*
278	* @returns VBox status code.
279	* @param rc Result code to use for the event completion.
280	*/
281	int GuestDnDCallbackEvent::Notify(int rc /* = VINF_SUCCESS */)
282	{
283	m_Rc = rc;
284	return RTSemEventSignal(m_SemEvent);
285	}
286
287	/**
288	* Waits on a callback event for being notified.
289	*
290	* @returns VBox status code.
291	* @param msTimeout Timeout (in ms) to wait for callback event.
292	*/
293	int GuestDnDCallbackEvent::Wait(RTMSINTERVAL msTimeout)
294	{
295	return RTSemEventWait(m_SemEvent, msTimeout);
296	}
297
298	/********************************************************************************************************************************
299	*
300	********************************************************************************************************************************/
301
302	GuestDnDState::GuestDnDState(const ComObjPtr<Guest>& pGuest)
303	: m_uProtocolVersion(0)
304	, m_fGuestFeatures0(VBOX_DND_GF_NONE)
305	, m_EventSem(NIL_RTSEMEVENT)
306	, m_dndActionDefault(0)
307	, m_dndLstActionsAllowed(0)
308	, m_pParent(pGuest)
309	{
310	int rc = RTSemEventCreate(&m_EventSem);
311	if (RT_FAILURE(rc))
312	throw rc;
313	}
314
315	GuestDnDState::~GuestDnDState(void)
316	{
317	reset();
318
319	int rc = RTSemEventDestroy(m_EventSem);
320	AssertRC(rc);
321	}
322
323	/**
324	* Notifies the waiting side about a guest notification response.
325	*/
326	int GuestDnDState::notifyAboutGuestResponse(void) const
327	{
328	return RTSemEventSignal(m_EventSem);
329	}
330
331	/**
332	* Resets a GuestDnDResponse object.
333	*/
334	void GuestDnDState::reset(void)
335	{
336	LogFlowThisFuncEnter();
337
338	m_dndActionDefault = 0;
339	m_dndLstActionsAllowed = 0;
340
341	m_lstFormats.clear();
342	}
343
344	/**
345	* Resets the progress object.
346	*
347	* @returns HRESULT
348	* @param pParent Parent to set for the progress object.
349	*/
350	HRESULT GuestDnDState::resetProgress(const ComObjPtr<Guest>& pParent)
351	{
352	m_pProgress.setNull();
353
354	HRESULT hr = m_pProgress.createObject();
355	if (SUCCEEDED(hr))
356	{
357	hr = m_pProgress->init(static_cast<IGuest *>(pParent),
358	Bstr(tr("Dropping data")).raw(),
359	TRUE /* aCancelable */);
360	}
361
362	return hr;
363	}
364
365	/**
366	* Returns whether the progress object has been canceled or not.
367	*
368	* @returns \c true if canceled, \c false if not.
369	*/
370	bool GuestDnDState::isProgressCanceled(void) const
371	{
372	BOOL fCanceled;
373	if (!m_pProgress.isNull())
374	{
375	HRESULT hr = m_pProgress->COMGETTER(Canceled)(&fCanceled);
376	AssertComRC(hr);
377	}
378	else
379	fCanceled = TRUE;
380
381	return RT_BOOL(fCanceled);
382	}
383
384	/**
385	* Sets a callback for a specific HGCM message.
386	*
387	* @returns VBox status code.
388	* @param uMsg HGCM message ID to set callback for.
389	* @param pfnCallback Callback function pointer to use.
390	* @param pvUser User-provided arguments for the callback function. Optional and can be NULL.
391	*/
392	int GuestDnDState::setCallback(uint32_t uMsg, PFNGUESTDNDCALLBACK pfnCallback, void pvUser / = NULL */)
393	{
394	GuestDnDCallbackMap::iterator it = m_mapCallbacks.find(uMsg);
395
396	/* Add. */
397	if (pfnCallback)
398	{
399	if (it == m_mapCallbacks.end())
400	{
401	m_mapCallbacks[uMsg] = GuestDnDCallback(pfnCallback, uMsg, pvUser);
402	return VINF_SUCCESS;
403	}
404
405	AssertMsgFailed(("Callback for message %RU32 already registered\n", uMsg));
406	return VERR_ALREADY_EXISTS;
407	}
408
409	/* Remove. */
410	if (it != m_mapCallbacks.end())
411	m_mapCallbacks.erase(it);
412
413	return VINF_SUCCESS;
414	}
415
416	/**
417	* Sets the progress object to a new state.
418	*
419	* @returns VBox status code.
420	* @param uPercentage Percentage (0-100) to set.
421	* @param uStatus Status (of type DND_PROGRESS_XXX) to set.
422	* @param rcOp IPRT-style result code to set. Optional.
423	* @param strMsg Message to set. Optional.
424	*/
425	int GuestDnDState::setProgress(unsigned uPercentage, uint32_t uStatus,
426	int rcOp /* = VINF_SUCCESS /, const Utf8Str &strMsg / = "" */)
427	{
428	LogFlowFunc(("uPercentage=%u, uStatus=%RU32, , rcOp=%Rrc, strMsg=%s\n",
429	uPercentage, uStatus, rcOp, strMsg.c_str()));
430
431	HRESULT hr = S_OK;
432
433	if (m_pProgress.isNull())
434	return VINF_SUCCESS;
435
436	BOOL fCompleted = FALSE;
437	hr = m_pProgress->COMGETTER(Completed)(&fCompleted);
438	AssertComRCReturn(hr, VERR_COM_UNEXPECTED);
439
440	BOOL fCanceled = FALSE;
441	hr = m_pProgress->COMGETTER(Canceled)(&fCanceled);
442	AssertComRCReturn(hr, VERR_COM_UNEXPECTED);
443
444	LogFlowFunc(("Progress fCompleted=%RTbool, fCanceled=%RTbool\n", fCompleted, fCanceled));
445
446	int rc = VINF_SUCCESS;
447
448	switch (uStatus)
449	{
450	case DragAndDropSvc::DND_PROGRESS_ERROR:
451	{
452	LogRel(("DnD: Guest reported error %Rrc\n", rcOp));
453
454	if (!fCompleted)
455	hr = m_pProgress->i_notifyComplete(VBOX_E_DND_ERROR,
456	COM_IIDOF(IGuest),
457	m_pParent->getComponentName(), strMsg.c_str());
458	reset();
459	break;
460	}
461
462	case DragAndDropSvc::DND_PROGRESS_CANCELLED:
463	{
464	LogRel2(("DnD: Guest cancelled operation\n"));
465
466	if (!fCanceled)
467	{
468	hr = m_pProgress->Cancel();
469	AssertComRC(hr);
470	}
471
472	if (!fCompleted)
473	{
474	hr = m_pProgress->i_notifyComplete(S_OK);
475	AssertComRC(hr);
476	}
477
478	reset();
479	break;
480	}
481
482	case DragAndDropSvc::DND_PROGRESS_RUNNING:
483	RT_FALL_THROUGH();
484	case DragAndDropSvc::DND_PROGRESS_COMPLETE:
485	{
486	LogRel2(("DnD: Guest reporting running/completion status with %u%%\n", uPercentage));
487
488	if ( !fCompleted
489	&& !fCanceled)
490	{
491	hr = m_pProgress->SetCurrentOperationProgress(uPercentage);
492	AssertComRCReturn(hr, VERR_COM_UNEXPECTED);
493	if ( uStatus == DragAndDropSvc::DND_PROGRESS_COMPLETE
494	\|\| uPercentage >= 100)
495	{
496	hr = m_pProgress->i_notifyComplete(S_OK);
497	AssertComRCReturn(hr, VERR_COM_UNEXPECTED);
498	}
499	}
500	break;
501	}
502
503	default:
504	break;
505	}
506
507	LogFlowFuncLeaveRC(rc);
508	return rc;
509	}
510
511	/**
512	* Dispatching function for handling the host service service callback.
513	*
514	* @returns VBox status code.
515	* @param u32Function HGCM message ID to handle.
516	* @param pvParms Pointer to optional data provided for a particular message. Optional.
517	* @param cbParms Size (in bytes) of \a pvParms.
518	*/
519	int GuestDnDState::onDispatch(uint32_t u32Function, void *pvParms, uint32_t cbParms)
520	{
521	LogFlowFunc(("u32Function=%RU32, pvParms=%p, cbParms=%RU32\n", u32Function, pvParms, cbParms));
522
523	int rc = VERR_WRONG_ORDER; /* Play safe. */
524
525	/* Whether or not to try calling host-installed callbacks after successfully processing the message. */
526	bool fTryCallbacks = false;
527
528	switch (u32Function)
529	{
530	case DragAndDropSvc::GUEST_DND_FN_CONNECT:
531	{
532	DragAndDropSvc::PVBOXDNDCBCONNECTDATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBCONNECTDATA>(pvParms);
533	AssertPtr(pCBData);
534	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBCONNECTDATA) == cbParms, VERR_INVALID_PARAMETER);
535	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_CONNECT == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
536
537	m_uProtocolVersion = pCBData->uProtocolVersion;
538	/** @todo Handle flags. */
539
540	LogThisFunc(("Client connected, using protocol v%RU32\n", m_uProtocolVersion));
541
542	rc = VINF_SUCCESS;
543	break;
544	}
545
546	case DragAndDropSvc::GUEST_DND_FN_REPORT_FEATURES:
547	{
548	DragAndDropSvc::PVBOXDNDCBREPORTFEATURESDATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBREPORTFEATURESDATA>(pvParms);
549	AssertPtr(pCBData);
550	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBREPORTFEATURESDATA) == cbParms, VERR_INVALID_PARAMETER);
551	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_REPORT_FEATURES == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
552
553	m_fGuestFeatures0 = pCBData->fGuestFeatures0;
554
555	LogThisFunc(("Client reported features: %#RX64\n", m_fGuestFeatures0));
556
557	rc = VINF_SUCCESS;
558	break;
559	}
560
561	case DragAndDropSvc::GUEST_DND_FN_DISCONNECT:
562	{
563	LogThisFunc(("Client disconnected\n"));
564	rc = setProgress(100, DND_PROGRESS_CANCELLED, VINF_SUCCESS);
565	break;
566	}
567
568	case DragAndDropSvc::GUEST_DND_FN_HG_ACK_OP:
569	{
570	DragAndDropSvc::PVBOXDNDCBHGACKOPDATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBHGACKOPDATA>(pvParms);
571	AssertPtr(pCBData);
572	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBHGACKOPDATA) == cbParms, VERR_INVALID_PARAMETER);
573	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_HG_ACK_OP == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
574
575	LogRel2(("DnD: Guest responded with action '%s' for host->guest drag event\n", DnDActionToStr(pCBData->uAction)));
576
577	setActionDefault(pCBData->uAction);
578	rc = notifyAboutGuestResponse();
579	break;
580	}
581
582	case DragAndDropSvc::GUEST_DND_FN_HG_REQ_DATA:
583	{
584	DragAndDropSvc::PVBOXDNDCBHGREQDATADATA pCBData = reinterpret_cast<DragAndDropSvc::PVBOXDNDCBHGREQDATADATA>(pvParms);
585	AssertPtr(pCBData);
586	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBHGREQDATADATA) == cbParms, VERR_INVALID_PARAMETER);
587	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_HG_REQ_DATA == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
588
589	if ( pCBData->cbFormat == 0
590	\|\| pCBData->cbFormat > _64K /** @todo Make this configurable? */
591	\|\| pCBData->pszFormat == NULL)
592	{
593	rc = VERR_INVALID_PARAMETER;
594	}
595	else if (!RTStrIsValidEncoding(pCBData->pszFormat))
596	{
597	rc = VERR_INVALID_PARAMETER;
598	}
599	else
600	{
601	setFormats(GuestDnD::toFormatList(pCBData->pszFormat));
602	rc = VINF_SUCCESS;
603	}
604
605	int rc2 = notifyAboutGuestResponse();
606	if (RT_SUCCESS(rc))
607	rc = rc2;
608	break;
609	}
610
611	case DragAndDropSvc::GUEST_DND_FN_HG_EVT_PROGRESS:
612	{
613	DragAndDropSvc::PVBOXDNDCBHGEVTPROGRESSDATA pCBData =
614	reinterpret_cast<DragAndDropSvc::PVBOXDNDCBHGEVTPROGRESSDATA>(pvParms);
615	AssertPtr(pCBData);
616	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBHGEVTPROGRESSDATA) == cbParms, VERR_INVALID_PARAMETER);
617	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_HG_EVT_PROGRESS == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
618
619	rc = setProgress(pCBData->uPercentage, pCBData->uStatus, pCBData->rc);
620	if (RT_SUCCESS(rc))
621	rc = notifyAboutGuestResponse();
622	break;
623	}
624	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
625	case DragAndDropSvc::GUEST_DND_FN_GH_ACK_PENDING:
626	{
627	DragAndDropSvc::PVBOXDNDCBGHACKPENDINGDATA pCBData =
628	reinterpret_cast<DragAndDropSvc::PVBOXDNDCBGHACKPENDINGDATA>(pvParms);
629	AssertPtr(pCBData);
630	AssertReturn(sizeof(DragAndDropSvc::VBOXDNDCBGHACKPENDINGDATA) == cbParms, VERR_INVALID_PARAMETER);
631	AssertReturn(DragAndDropSvc::CB_MAGIC_DND_GH_ACK_PENDING == pCBData->hdr.uMagic, VERR_INVALID_PARAMETER);
632
633	LogRel2(("DnD: Guest responded with pending action '%s' (%RU32 bytes format data) to guest->host drag event\n",
634	DnDActionToStr(pCBData->uDefAction), pCBData->cbFormat));
635
636	if ( pCBData->cbFormat == 0
637	\|\| pCBData->cbFormat > _64K /** @todo Make the maximum size configurable? */
638	\|\| pCBData->pszFormat == NULL)
639	{
640	rc = VERR_INVALID_PARAMETER;
641	}
642	else if (!RTStrIsValidEncoding(pCBData->pszFormat))
643	{
644	rc = VERR_INVALID_PARAMETER;
645	}
646	else
647	{
648	setFormats (GuestDnD::toFormatList(pCBData->pszFormat));
649	setActionDefault (pCBData->uDefAction);
650	setActionsAllowed(pCBData->uAllActions);
651
652	rc = VINF_SUCCESS;
653	}
654
655	int rc2 = notifyAboutGuestResponse();
656	if (RT_SUCCESS(rc))
657	rc = rc2;
658	break;
659	}
660	#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
661	default:
662	/* * Try if the event is covered by a registered callback. */
663	fTryCallbacks = true;
664	break;
665	}
666
667	/*
668	* Try the host's installed callbacks (if any).
669	*/
670	if (fTryCallbacks)
671	{
672	GuestDnDCallbackMap::const_iterator it = m_mapCallbacks.find(u32Function);
673	if (it != m_mapCallbacks.end())
674	{
675	AssertPtr(it->second.pfnCallback);
676	rc = it->second.pfnCallback(u32Function, pvParms, cbParms, it->second.pvUser);
677	}
678	else
679	{
680	LogFlowFunc(("No callback for function %RU32 defined\n", u32Function));
681	rc = VERR_NOT_SUPPORTED; /* Tell the guest. */
682	}
683	}
684
685	LogFlowFunc(("Returning rc=%Rrc\n", rc));
686	return rc;
687	}
688
689	/**
690	* Helper function to query the internal progress object to an IProgress interface.
691	*
692	* @returns HRESULT
693	* @param ppProgress Where to query the progress object to.
694	*/
695	HRESULT GuestDnDState::queryProgressTo(IProgress **ppProgress)
696	{
697	return m_pProgress.queryInterfaceTo(ppProgress);
698	}
699
700	/**
701	* Waits for a guest response to happen.
702	*
703	* @returns VBox status code.
704	* @param msTimeout Timeout (in ms) for waiting. Optional, waits 3000 ms if not specified.
705	*/
706	int GuestDnDState::waitForGuestResponse(RTMSINTERVAL msTimeout /= 3000 /) const
707	{
708	int rc = RTSemEventWait(m_EventSem, msTimeout);
709	#ifdef DEBUG_andy
710	LogFlowFunc(("msTimeout=%RU32, rc=%Rrc\n", msTimeout, rc));
711	#endif
712	return rc;
713	}
714
715	/*********************************************************************************************************************************
716	* GuestDnD implementation. *
717	********************************************************************************************************************************/
718
719	/** Static (Singleton) instance of the GuestDnD object. */
720	GuestDnD* GuestDnD::s_pInstance = NULL;
721
722	GuestDnD::GuestDnD(const ComObjPtr<Guest> &pGuest)
723	: m_pGuest(pGuest)
724	, m_cTransfersPending(0)
725	{
726	LogFlowFuncEnter();
727
728	try
729	{
730	m_pState = new GuestDnDState(pGuest);
731	}
732	catch (std::bad_alloc &)
733	{
734	throw VERR_NO_MEMORY;
735	}
736
737	int rc = RTCritSectInit(&m_CritSect);
738	if (RT_FAILURE(rc))
739	throw rc;
740
741	/* List of supported default MIME types. */
742	LogRel2(("DnD: Supported default host formats:\n"));
743	const com::Utf8Str arrEntries[] = { VBOX_DND_FORMATS_DEFAULT };
744	for (size_t i = 0; i < RT_ELEMENTS(arrEntries); i++)
745	{
746	m_strDefaultFormats.push_back(arrEntries[i]);
747	LogRel2(("DnD: \t%s\n", arrEntries[i].c_str()));
748	}
749	}
750
751	GuestDnD::~GuestDnD(void)
752	{
753	LogFlowFuncEnter();
754
755	Assert(m_cTransfersPending == 0); /* Sanity. */
756
757	RTCritSectDelete(&m_CritSect);
758
759	if (m_pState)
760	delete m_pState;
761	}
762
763	/**
764	* Adjusts coordinations to a given screen.
765	*
766	* @returns HRESULT
767	* @param uScreenId ID of screen to adjust coordinates to.
768	* @param puX Pointer to X coordinate to adjust. Will return the adjusted value on success.
769	* @param puY Pointer to Y coordinate to adjust. Will return the adjusted value on success.
770	*/
771	HRESULT GuestDnD::adjustScreenCoordinates(ULONG uScreenId, ULONG puX, ULONG puY) const
772	{
773	/** @todo r=andy Save the current screen's shifting coordinates to speed things up.
774	* Only query for new offsets when the screen ID or the screen's resolution has changed. */
775
776	/* For multi-monitor support we need to add shift values to the coordinates
777	* (depending on the screen number). */
778	ComObjPtr<Console> pConsole = m_pGuest->i_getConsole();
779	ComPtr<IDisplay> pDisplay;
780	HRESULT hr = pConsole->COMGETTER(Display)(pDisplay.asOutParam());
781	if (FAILED(hr))
782	return hr;
783
784	ULONG dummy;
785	LONG xShift, yShift;
786	GuestMonitorStatus_T monitorStatus;
787	hr = pDisplay->GetScreenResolution(uScreenId, &dummy, &dummy, &dummy,
788	&xShift, &yShift, &monitorStatus);
789	if (FAILED(hr))
790	return hr;
791
792	if (puX)
793	*puX += xShift;
794	if (puY)
795	*puY += yShift;
796
797	LogFlowFunc(("uScreenId=%RU32, x=%RU32, y=%RU32\n", uScreenId, puX ? puX : 0, puY ? puY : 0));
798	return S_OK;
799	}
800
801	/**
802	* Returns a DnD guest state.
803	*
804	* @returns Pointer to DnD guest state, or NULL if not found / invalid.
805	* @param uID ID of DnD guest state to return.
806	*/
807	GuestDnDState GuestDnD::getState(uint32_t uID / = 0 */) const
808	{
809	AssertMsgReturn(uID == 0, ("Only one state (0) is supported at the moment\n"), NULL);
810
811	return m_pState;
812	}
813
814	/**
815	* Sends a (blocking) message to the host side of the host service.
816	*
817	* @returns VBox status code.
818	* @param u32Function HGCM message ID to send.
819	* @param cParms Number of parameters to send.
820	* @param paParms Array of parameters to send. Must match \c cParms.
821	*/
822	int GuestDnD::hostCall(uint32_t u32Function, uint32_t cParms, PVBOXHGCMSVCPARM paParms) const
823	{
824	Assert(!m_pGuest.isNull());
825	ComObjPtr<Console> pConsole = m_pGuest->i_getConsole();
826
827	/* Forward the information to the VMM device. */
828	Assert(!pConsole.isNull());
829	VMMDev *pVMMDev = pConsole->i_getVMMDev();
830	if (!pVMMDev)
831	return VERR_COM_OBJECT_NOT_FOUND;
832
833	return pVMMDev->hgcmHostCall("VBoxDragAndDropSvc", u32Function, cParms, paParms);
834	}
835
836	/**
837	* Registers a GuestDnDSource object with the GuestDnD manager.
838	*
839	* Currently only one source is supported at a time.
840	*
841	* @returns VBox status code.
842	* @param Source Source to register.
843	*/
844	int GuestDnD::registerSource(const ComObjPtr<GuestDnDSource> &Source)
845	{
846	GUESTDND_LOCK();
847
848	Assert(m_lstSrc.size() == 0); /* We only support one source at a time at the moment. */
849	m_lstSrc.push_back(Source);
850
851	GUESTDND_UNLOCK();
852	return VINF_SUCCESS;
853	}
854
855	/**
856	* Unregisters a GuestDnDSource object from the GuestDnD manager.
857	*
858	* @returns VBox status code.
859	* @param Source Source to unregister.
860	*/
861	int GuestDnD::unregisterSource(const ComObjPtr<GuestDnDSource> &Source)
862	{
863	GUESTDND_LOCK();
864
865	GuestDnDSrcList::iterator itSrc = std::find(m_lstSrc.begin(), m_lstSrc.end(), Source);
866	if (itSrc != m_lstSrc.end())
867	m_lstSrc.erase(itSrc);
868
869	GUESTDND_UNLOCK();
870	return VINF_SUCCESS;
871	}
872
873	/**
874	* Returns the current number of registered sources.
875	*
876	* @returns Current number of registered sources.
877	*/
878	size_t GuestDnD::getSourceCount(void)
879	{
880	GUESTDND_LOCK_RET(0);
881
882	size_t cSources = m_lstSrc.size();
883
884	GUESTDND_UNLOCK();
885	return cSources;
886	}
887
888	/**
889	* Registers a GuestDnDTarget object with the GuestDnD manager.
890	*
891	* Currently only one target is supported at a time.
892	*
893	* @returns VBox status code.
894	* @param Target Target to register.
895	*/
896	int GuestDnD::registerTarget(const ComObjPtr<GuestDnDTarget> &Target)
897	{
898	GUESTDND_LOCK();
899
900	Assert(m_lstTgt.size() == 0); /* We only support one target at a time at the moment. */
901	m_lstTgt.push_back(Target);
902
903	GUESTDND_UNLOCK();
904	return VINF_SUCCESS;
905	}
906
907	/**
908	* Unregisters a GuestDnDTarget object from the GuestDnD manager.
909	*
910	* @returns VBox status code.
911	* @param Target Target to unregister.
912	*/
913	int GuestDnD::unregisterTarget(const ComObjPtr<GuestDnDTarget> &Target)
914	{
915	GUESTDND_LOCK();
916
917	GuestDnDTgtList::iterator itTgt = std::find(m_lstTgt.begin(), m_lstTgt.end(), Target);
918	if (itTgt != m_lstTgt.end())
919	m_lstTgt.erase(itTgt);
920
921	GUESTDND_UNLOCK();
922	return VINF_SUCCESS;
923	}
924
925	/**
926	* Returns the current number of registered targets.
927	*
928	* @returns Current number of registered targets.
929	*/
930	size_t GuestDnD::getTargetCount(void)
931	{
932	GUESTDND_LOCK_RET(0);
933
934	size_t cTargets = m_lstTgt.size();
935
936	GUESTDND_UNLOCK();
937	return cTargets;
938	}
939
940	/**
941	* Static main dispatcher function to handle callbacks from the DnD host service.
942	*
943	* @returns VBox status code.
944	* @param pvExtension Pointer to service extension.
945	* @param u32Function Callback HGCM message ID.
946	* @param pvParms Pointer to optional data provided for a particular message. Optional.
947	* @param cbParms Size (in bytes) of \a pvParms.
948	*/
949	/* static */
950	DECLCALLBACK(int) GuestDnD::notifyDnDDispatcher(void *pvExtension, uint32_t u32Function,
951	void *pvParms, uint32_t cbParms)
952	{
953	LogFlowFunc(("pvExtension=%p, u32Function=%RU32, pvParms=%p, cbParms=%RU32\n",
954	pvExtension, u32Function, pvParms, cbParms));
955
956	GuestDnD pGuestDnD = reinterpret_cast<GuestDnD>(pvExtension);
957	AssertPtrReturn(pGuestDnD, VERR_INVALID_POINTER);
958
959	/** @todo In case we need to handle multiple guest DnD responses at a time this
960	* would be the place to lookup and dispatch to those. For the moment we
961	* only have one response -- simple. */
962	if (pGuestDnD->m_pState)
963	return pGuestDnD->m_pState->onDispatch(u32Function, pvParms, cbParms);
964
965	return VERR_NOT_SUPPORTED;
966	}
967
968	/**
969	* Static helper function to determine whether a format is part of a given MIME list.
970	*
971	* @returns \c true if found, \c false if not.
972	* @param strFormat Format to search for.
973	* @param lstFormats MIME list to search in.
974	*/
975	/* static */
976	bool GuestDnD::isFormatInFormatList(const com::Utf8Str &strFormat, const GuestDnDMIMEList &lstFormats)
977	{
978	return std::find(lstFormats.begin(), lstFormats.end(), strFormat) != lstFormats.end();
979	}
980
981	/**
982	* Static helper function to create a GuestDnDMIMEList out of a format list string.
983	*
984	* @returns MIME list object.
985	* @param strFormats List of formats to convert.
986	* @param strSep Separator to use. If not specified, DND_FORMATS_SEPARATOR_STR will be used.
987	*/
988	/* static */
989	GuestDnDMIMEList GuestDnD::toFormatList(const com::Utf8Str &strFormats, const com::Utf8Str &strSep /* = DND_FORMATS_SEPARATOR_STR */)
990	{
991	GuestDnDMIMEList lstFormats;
992	RTCList<RTCString> lstFormatsTmp = strFormats.split(strSep);
993
994	for (size_t i = 0; i < lstFormatsTmp.size(); i++)
995	lstFormats.push_back(com::Utf8Str(lstFormatsTmp.at(i)));
996
997	return lstFormats;
998	}
999
1000	/**
1001	* Static helper function to create a format list string from a given GuestDnDMIMEList object.
1002	*
1003	* @returns Format list string.
1004	* @param lstFormats GuestDnDMIMEList to convert.
1005	*/
1006	/* static */
1007	com::Utf8Str GuestDnD::toFormatString(const GuestDnDMIMEList &lstFormats)
1008	{
1009	com::Utf8Str strFormat;
1010	for (size_t i = 0; i < lstFormats.size(); i++)
1011	{
1012	const com::Utf8Str &f = lstFormats.at(i);
1013	strFormat += f + DND_FORMATS_SEPARATOR_STR;
1014	}
1015
1016	return strFormat;
1017	}
1018
1019	/**
1020	* Static helper function to create a filtered GuestDnDMIMEList object from supported and wanted formats.
1021	*
1022	* @returns Filtered MIME list object.
1023	* @param lstFormatsSupported MIME list of supported formats.
1024	* @param lstFormatsWanted MIME list of wanted formats in returned object.
1025	*/
1026	/* static */
1027	GuestDnDMIMEList GuestDnD::toFilteredFormatList(const GuestDnDMIMEList &lstFormatsSupported, const GuestDnDMIMEList &lstFormatsWanted)
1028	{
1029	GuestDnDMIMEList lstFormats;
1030
1031	for (size_t i = 0; i < lstFormatsWanted.size(); i++)
1032	{
1033	/* Only keep supported format types. */
1034	if (std::find(lstFormatsSupported.begin(),
1035	lstFormatsSupported.end(), lstFormatsWanted.at(i)) != lstFormatsSupported.end())
1036	{
1037	lstFormats.push_back(lstFormatsWanted[i]);
1038	}
1039	}
1040
1041	return lstFormats;
1042	}
1043
1044	/**
1045	* Static helper function to create a filtered GuestDnDMIMEList object from supported and wanted formats.
1046	*
1047	* @returns Filtered MIME list object.
1048	* @param lstFormatsSupported MIME list of supported formats.
1049	* @param strFormatsWanted Format list string of wanted formats in returned object.
1050	*/
1051	/* static */
1052	GuestDnDMIMEList GuestDnD::toFilteredFormatList(const GuestDnDMIMEList &lstFormatsSupported, const com::Utf8Str &strFormatsWanted)
1053	{
1054	GuestDnDMIMEList lstFmt;
1055
1056	RTCList<RTCString> lstFormats = strFormatsWanted.split(DND_FORMATS_SEPARATOR_STR);
1057	size_t i = 0;
1058	while (i < lstFormats.size())
1059	{
1060	/* Only keep allowed format types. */
1061	if (std::find(lstFormatsSupported.begin(),
1062	lstFormatsSupported.end(), lstFormats.at(i)) != lstFormatsSupported.end())
1063	{
1064	lstFmt.push_back(lstFormats[i]);
1065	}
1066	i++;
1067	}
1068
1069	return lstFmt;
1070	}
1071
1072	/**
1073	* Static helper function to convert a Main DnD action an internal DnD action.
1074	*
1075	* @returns Internal DnD action, or VBOX_DND_ACTION_IGNORE if not found / supported.
1076	* @param enmAction Main DnD action to convert.
1077	*/
1078	/* static */
1079	VBOXDNDACTION GuestDnD::toHGCMAction(DnDAction_T enmAction)
1080	{
1081	VBOXDNDACTION dndAction = VBOX_DND_ACTION_IGNORE;
1082	switch (enmAction)
1083	{
1084	case DnDAction_Copy:
1085	dndAction = VBOX_DND_ACTION_COPY;
1086	break;
1087	case DnDAction_Move:
1088	dndAction = VBOX_DND_ACTION_MOVE;
1089	break;
1090	case DnDAction_Link:
1091	/* For now it doesn't seems useful to allow a link
1092	action between host & guest. Later? */
1093	case DnDAction_Ignore:
1094	/* Ignored. */
1095	break;
1096	default:
1097	AssertMsgFailed(("Action %RU32 not recognized!\n", enmAction));
1098	break;
1099	}
1100
1101	return dndAction;
1102	}
1103
1104	/**
1105	* Static helper function to convert a Main DnD default action and allowed Main actions to their
1106	* corresponding internal representations.
1107	*
1108	* @param enmDnDActionDefault Default Main action to convert.
1109	* @param pDnDActionDefault Where to store the converted default action.
1110	* @param vecDnDActionsAllowed Allowed Main actions to convert.
1111	* @param pDnDLstActionsAllowed Where to store the converted allowed actions.
1112	*/
1113	/* static */
1114	void GuestDnD::toHGCMActions(DnDAction_T enmDnDActionDefault,
1115	VBOXDNDACTION *pDnDActionDefault,
1116	const std::vector<DnDAction_T> vecDnDActionsAllowed,
1117	VBOXDNDACTIONLIST *pDnDLstActionsAllowed)
1118	{
1119	VBOXDNDACTIONLIST dndLstActionsAllowed = VBOX_DND_ACTION_IGNORE;
1120	VBOXDNDACTION dndActionDefault = toHGCMAction(enmDnDActionDefault);
1121
1122	if (!vecDnDActionsAllowed.empty())
1123	{
1124	/* First convert the allowed actions to a bit array. */
1125	for (size_t i = 0; i < vecDnDActionsAllowed.size(); i++)
1126	dndLstActionsAllowed \|= toHGCMAction(vecDnDActionsAllowed[i]);
1127
1128	/*
1129	* If no default action is set (ignoring), try one of the
1130	* set allowed actions, preferring copy, move (in that order).
1131	*/
1132	if (isDnDIgnoreAction(dndActionDefault))
1133	{
1134	if (hasDnDCopyAction(dndLstActionsAllowed))
1135	dndActionDefault = VBOX_DND_ACTION_COPY;
1136	else if (hasDnDMoveAction(dndLstActionsAllowed))
1137	dndActionDefault = VBOX_DND_ACTION_MOVE;
1138	}
1139	}
1140
1141	if (pDnDActionDefault)
1142	*pDnDActionDefault = dndActionDefault;
1143	if (pDnDLstActionsAllowed)
1144	*pDnDLstActionsAllowed = dndLstActionsAllowed;
1145	}
1146
1147	/**
1148	* Static helper function to convert an internal DnD action to its Main representation.
1149	*
1150	* @returns Converted Main DnD action.
1151	* @param dndAction DnD action to convert.
1152	*/
1153	/* static */
1154	DnDAction_T GuestDnD::toMainAction(VBOXDNDACTION dndAction)
1155	{
1156	/* For now it doesn't seems useful to allow a
1157	* link action between host & guest. Maybe later! */
1158	return isDnDCopyAction(dndAction) ? DnDAction_Copy
1159	: isDnDMoveAction(dndAction) ? DnDAction_Move
1160	: DnDAction_Ignore;
1161	}
1162
1163	/**
1164	* Static helper function to convert an internal DnD action list to its Main representation.
1165	*
1166	* @returns Converted Main DnD action list.
1167	* @param dndActionList DnD action list to convert.
1168	*/
1169	/* static */
1170	std::vector<DnDAction_T> GuestDnD::toMainActions(VBOXDNDACTIONLIST dndActionList)
1171	{
1172	std::vector<DnDAction_T> vecActions;
1173
1174	/* For now it doesn't seems useful to allow a
1175	* link action between host & guest. Maybe later! */
1176	RTCList<DnDAction_T> lstActions;
1177	if (hasDnDCopyAction(dndActionList))
1178	lstActions.append(DnDAction_Copy);
1179	if (hasDnDMoveAction(dndActionList))
1180	lstActions.append(DnDAction_Move);
1181
1182	for (size_t i = 0; i < lstActions.size(); ++i)
1183	vecActions.push_back(lstActions.at(i));
1184
1185	return vecActions;
1186	}
1187
1188	/*********************************************************************************************************************************
1189	* GuestDnDBase implementation. *
1190	********************************************************************************************************************************/
1191
1192	GuestDnDBase::GuestDnDBase(void)
1193	: m_fIsPending(false)
1194	{
1195	/* Initialize public attributes. */
1196	m_lstFmtSupported = GuestDnDInst()->defaultFormats();
1197	}
1198
1199	/**
1200	* Checks whether a given DnD format is supported or not.
1201	*
1202	* @returns \c true if supported, \c false if not.
1203	* @param aFormat DnD format to check.
1204	*/
1205	bool GuestDnDBase::i_isFormatSupported(const com::Utf8Str &aFormat) const
1206	{
1207	return std::find(m_lstFmtSupported.begin(), m_lstFmtSupported.end(), aFormat) != m_lstFmtSupported.end();
1208	}
1209
1210	/**
1211	* Returns the currently supported DnD formats.
1212	*
1213	* @returns List of the supported DnD formats.
1214	*/
1215	const GuestDnDMIMEList &GuestDnDBase::i_getFormats(void) const
1216	{
1217	return m_lstFmtSupported;
1218	}
1219
1220	/**
1221	* Adds DnD formats to the supported formats list.
1222	*
1223	* @returns HRESULT
1224	* @param aFormats List of DnD formats to add.
1225	*/
1226	HRESULT GuestDnDBase::i_addFormats(const GuestDnDMIMEList &aFormats)
1227	{
1228	for (size_t i = 0; i < aFormats.size(); ++i)
1229	{
1230	Utf8Str strFormat = aFormats.at(i);
1231	if (std::find(m_lstFmtSupported.begin(),
1232	m_lstFmtSupported.end(), strFormat) == m_lstFmtSupported.end())
1233	{
1234	m_lstFmtSupported.push_back(strFormat);
1235	}
1236	}
1237
1238	return S_OK;
1239	}
1240
1241	/**
1242	* Removes DnD formats from tehh supported formats list.
1243	*
1244	* @returns HRESULT
1245	* @param aFormats List of DnD formats to remove.
1246	*/
1247	HRESULT GuestDnDBase::i_removeFormats(const GuestDnDMIMEList &aFormats)
1248	{
1249	for (size_t i = 0; i < aFormats.size(); ++i)
1250	{
1251	Utf8Str strFormat = aFormats.at(i);
1252	GuestDnDMIMEList::iterator itFormat = std::find(m_lstFmtSupported.begin(),
1253	m_lstFmtSupported.end(), strFormat);
1254	if (itFormat != m_lstFmtSupported.end())
1255	m_lstFmtSupported.erase(itFormat);
1256	}
1257
1258	return S_OK;
1259	}
1260
1261	/**
1262	* Adds a new guest DnD message to the internal message queue.
1263	*
1264	* @returns VBox status code.
1265	* @param pMsg Pointer to message to add.
1266	*/
1267	int GuestDnDBase::msgQueueAdd(GuestDnDMsg *pMsg)
1268	{
1269	m_DataBase.lstMsgOut.push_back(pMsg);
1270	return VINF_SUCCESS;
1271	}
1272
1273	/**
1274	* Returns the next guest DnD message in the internal message queue (FIFO).
1275	*
1276	* @returns Pointer to guest DnD message, or NULL if none found.
1277	*/
1278	GuestDnDMsg *GuestDnDBase::msgQueueGetNext(void)
1279	{
1280	if (m_DataBase.lstMsgOut.empty())
1281	return NULL;
1282	return m_DataBase.lstMsgOut.front();
1283	}
1284
1285	/**
1286	* Removes the next guest DnD message from the internal message queue.
1287	*/
1288	void GuestDnDBase::msgQueueRemoveNext(void)
1289	{
1290	if (!m_DataBase.lstMsgOut.empty())
1291	{
1292	GuestDnDMsg *pMsg = m_DataBase.lstMsgOut.front();
1293	if (pMsg)
1294	delete pMsg;
1295	m_DataBase.lstMsgOut.pop_front();
1296	}
1297	}
1298
1299	/**
1300	* Clears the internal message queue.
1301	*/
1302	void GuestDnDBase::msgQueueClear(void)
1303	{
1304	LogFlowFunc(("cMsg=%zu\n", m_DataBase.lstMsgOut.size()));
1305
1306	GuestDnDMsgList::iterator itMsg = m_DataBase.lstMsgOut.begin();
1307	while (itMsg != m_DataBase.lstMsgOut.end())
1308	{
1309	GuestDnDMsg pMsg = itMsg;
1310	if (pMsg)
1311	delete pMsg;
1312
1313	itMsg++;
1314	}
1315
1316	m_DataBase.lstMsgOut.clear();
1317	}
1318
1319	/**
1320	* Sends a request to the guest side to cancel the current DnD operation.
1321	*
1322	* @returns VBox status code.
1323	*/
1324	int GuestDnDBase::sendCancel(void)
1325	{
1326	GuestDnDMsg Msg;
1327	Msg.setType(HOST_DND_FN_CANCEL);
1328	if (m_pState->m_uProtocolVersion >= 3)
1329	Msg.appendUInt32(0); /** @todo ContextID not used yet. */
1330
1331	LogRel2(("DnD: Cancelling operation on guest ...\n"));
1332
1333	int rc = GuestDnDInst()->hostCall(Msg.getType(), Msg.getCount(), Msg.getParms());
1334	if (RT_FAILURE(rc))
1335	LogRel(("DnD: Cancelling operation on guest failed with %Rrc\n", rc));
1336
1337	return rc;
1338	}
1339
1340	/**
1341	* Helper function to update the progress based on given a GuestDnDData object.
1342	*
1343	* @returns VBox status code.
1344	* @param pData GuestDnDData object to use for accounting.
1345	* @param pState Guest state to update its progress object for.
1346	* @param cbDataAdd By how much data (in bytes) to update the progress.
1347	*/
1348	int GuestDnDBase::updateProgress(GuestDnDData pData, GuestDnDState pState,
1349	size_t cbDataAdd /* = 0 */)
1350	{
1351	AssertPtrReturn(pData, VERR_INVALID_POINTER);
1352	AssertPtrReturn(pState, VERR_INVALID_POINTER);
1353	/* cbDataAdd is optional. */
1354
1355	LogFlowFunc(("cbExtra=%zu, cbProcessed=%zu, cbRemaining=%zu, cbDataAdd=%zu\n",
1356	pData->cbExtra, pData->cbProcessed, pData->getRemaining(), cbDataAdd));
1357
1358	if ( !pState
1359	\|\| !cbDataAdd) /* Only update if something really changes. */
1360	return VINF_SUCCESS;
1361
1362	if (cbDataAdd)
1363	pData->addProcessed(cbDataAdd);
1364
1365	const uint8_t uPercent = pData->getPercentComplete();
1366
1367	LogRel2(("DnD: Transfer %RU8%% complete\n", uPercent));
1368
1369	int rc = pState->setProgress(uPercent,
1370	pData->isComplete()
1371	? DND_PROGRESS_COMPLETE
1372	: DND_PROGRESS_RUNNING);
1373	LogFlowFuncLeaveRC(rc);
1374	return rc;
1375	}
1376
1377	/**
1378	* Waits for a specific guest callback event to get signalled.
1379	*
1380	* @returns VBox status code. Will return VERR_CANCELLED if the user has cancelled the progress object.
1381	* @param pEvent Callback event to wait for.
1382	* @param pState Guest state to update.
1383	* @param msTimeout Timeout (in ms) to wait.
1384	*/
1385	int GuestDnDBase::waitForEvent(GuestDnDCallbackEvent pEvent, GuestDnDState pState, RTMSINTERVAL msTimeout)
1386	{
1387	AssertPtrReturn(pEvent, VERR_INVALID_POINTER);
1388	AssertPtrReturn(pState, VERR_INVALID_POINTER);
1389
1390	int rc;
1391
1392	LogFlowFunc(("msTimeout=%RU32\n", msTimeout));
1393
1394	uint64_t tsStart = RTTimeMilliTS();
1395	do
1396	{
1397	/*
1398	* Wait until our desired callback triggered the
1399	* wait event. As we don't want to block if the guest does not
1400	* respond, do busy waiting here.
1401	*/
1402	rc = pEvent->Wait(500 /* ms */);
1403	if (RT_SUCCESS(rc))
1404	{
1405	rc = pEvent->Result();
1406	LogFlowFunc(("Callback done, result is %Rrc\n", rc));
1407	break;
1408	}
1409	else if (rc == VERR_TIMEOUT) /* Continue waiting. */
1410	rc = VINF_SUCCESS;
1411
1412	if ( msTimeout != RT_INDEFINITE_WAIT
1413	&& RTTimeMilliTS() - tsStart > msTimeout)
1414	{
1415	rc = VERR_TIMEOUT;
1416	LogRel2(("DnD: Error: Guest did not respond within time\n"));
1417	}
1418	else if (pState->isProgressCanceled())
1419	{
1420	LogRel2(("DnD: Operation was canceled by user\n"));
1421	rc = VERR_CANCELLED;
1422	}
1423
1424	} while (RT_SUCCESS(rc));
1425
1426	LogFlowFuncLeaveRC(rc);
1427	return rc;
1428	}
1429	#endif /* VBOX_WITH_DRAG_AND_DROP */
1430

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source: vbox/trunk/src/VBox/Main/src-client/GuestDnDPrivate.cpp@ 97761

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