VBoxDnD.cpp@ 51924

Last change on this file since 51924 was 51924, checked in by vboxsync, 10 years ago
VBoxTray/DnD: Assign service context before starting internal thread.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 48.8 KB

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1	/* $Id: VBoxDnD.cpp 51924 2014-07-08 11:08:53Z vboxsync $ */
2	/** @file
3	* VBoxDnD.cpp - Windows-specific bits of the drag'n drop service.
4	*/
5
6	/*
7	* Copyright (C) 2013-2014 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	#include <windows.h>
18	#include "VBoxTray.h"
19	#include "VBoxHelpers.h"
20	#include "VBoxDnD.h"
21
22	#include <VBox/VBoxGuestLib.h>
23	#include "VBox/HostServices/DragAndDropSvc.h"
24
25	#include <iprt/asm.h>
26	#include <iprt/assert.h>
27	#include <iprt/err.h>
28	#include <iprt/ldr.h>
29	#include <iprt/list.h>
30	#include <iprt/mem.h>
31
32	#include <iprt/cpp/mtlist.h>
33	#include <iprt/cpp/ministring.h>
34
35	#include <iprt/cpp/mtlist.h>
36
37	#include <VBoxGuestInternal.h>
38	#ifdef LOG_GROUP
39	# undef LOG_GROUP
40	#endif
41	#define LOG_GROUP LOG_GROUP_GUEST_DND
42	#include <VBox/log.h>
43
44	/* Enable this define to see the proxy window(s) when debugging
45	* their behavior. Don't have this enabled in release builds! */
46	#ifdef DEBUG
47	//# define VBOX_DND_DEBUG_WND
48	#endif
49
50	/** @todo Merge this with messages from VBoxTray.h. */
51	#define WM_VBOXTRAY_DND_MESSAGE WM_APP + 401
52
53	/** Function pointer for SendInput(). This only is available starting
54	* at NT4 SP3+. */
55	typedef BOOL (WINAPI *PFNSENDINPUT)(UINT, LPINPUT, int);
56	typedef BOOL (WINAPI* PFNENUMDISPLAYMONITORS)(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
57
58	/** Static pointer to SendInput() function. */
59	static PFNSENDINPUT s_pfnSendInput = NULL;
60	static PFNENUMDISPLAYMONITORS s_pfnEnumDisplayMonitors = NULL;
61
62	static LRESULT CALLBACK vboxDnDWndProcInstance(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
63	static LRESULT CALLBACK vboxDnDWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
64
65	VBoxDnDWnd::VBoxDnDWnd(void)
66	: hThread(NIL_RTTHREAD),
67	mEventSem(NIL_RTSEMEVENT),
68	hWnd(NULL),
69	uAllActions(DND_IGNORE_ACTION),
70	mfMouseButtonDown(false),
71	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
72	pDropTarget(NULL),
73	#endif
74	mClientID(UINT32_MAX),
75	mMode(Unknown),
76	mState(Uninitialized)
77	{
78	RT_ZERO(startupInfo);
79
80	const RTCString arrEntries[] = { VBOX_DND_FORMATS_DEFAULT };
81	for (size_t i = 0; i < RT_ELEMENTS(arrEntries); i++)
82	this->lstAllowedFormats.append(arrEntries[i]);
83	}
84
85	VBoxDnDWnd::~VBoxDnDWnd(void)
86	{
87	Destroy();
88	}
89
90	/**
91	* Initializes the proxy window with a given DnD context.
92	*
93	* @return IPRT status code.
94	* @param pContext Pointer to context to use.
95	*/
96	int VBoxDnDWnd::Initialize(PVBOXDNDCONTEXT pContext)
97	{
98	AssertPtrReturn(pContext, VERR_INVALID_POINTER);
99
100	/* Save the context. */
101	this->pContext = pContext;
102
103	int rc = RTSemEventCreate(&mEventSem);
104	if (RT_SUCCESS(rc))
105	rc = RTCritSectInit(&mCritSect);
106
107	if (RT_SUCCESS(rc))
108	{
109	/* Message pump thread for our proxy window. */
110	rc = RTThreadCreate(&hThread, VBoxDnDWnd::Thread, this,
111	0, RTTHREADTYPE_MSG_PUMP, RTTHREADFLAGS_WAITABLE,
112	"VBoxTrayDnDWnd");
113	if (RT_SUCCESS(rc))
114	rc = RTThreadUserWait(hThread, 30 * 1000 /* Timeout in ms */);
115	}
116
117	if (RT_FAILURE(rc))
118	LogRel(("DnD: Failed to initialize proxy window, rc=%Rrc\n", rc));
119
120	LogFlowThisFunc(("Returning rc=%Rrc\n", rc));
121	return rc;
122	}
123
124	/**
125	* Destroys the proxy window and releases all remaining
126	* resources again.
127	*
128	*/
129	void VBoxDnDWnd::Destroy(void)
130	{
131	if (hThread != NIL_RTTHREAD)
132	{
133	int rcThread = VERR_WRONG_ORDER;
134	int rc = RTThreadWait(hThread, 60 * 1000 /* Timeout in ms */, &rcThread);
135	LogFlowFunc(("Waiting for thread resulted in %Rrc (thread exited with %Rrc)\n",
136	rc, rcThread));
137	}
138
139	reset();
140
141	RTCritSectDelete(&mCritSect);
142	if (mEventSem != NIL_RTSEMEVENT)
143	RTSemEventDestroy(mEventSem);
144
145	LogFlowFuncLeave();
146	}
147
148	/**
149	* Thread for handling the window's message pump.
150	*
151	* @return IPRT status code.
152	* @param hThread Handle to this thread.
153	* @param pvUser Pointer to VBoxDnDWnd instance which
154	* is using the thread.
155	*/
156	/* static */
157	int VBoxDnDWnd::Thread(RTTHREAD hThread, void *pvUser)
158	{
159	AssertPtrReturn(pvUser, VERR_INVALID_POINTER);
160
161	VBoxDnDWnd pThis = (VBoxDnDWnd)pvUser;
162	AssertPtr(pThis);
163
164	PVBOXDNDCONTEXT pContext = pThis->pContext;
165	AssertPtr(pContext);
166	AssertPtr(pContext->pEnv);
167
168	HINSTANCE hInstance = pContext->pEnv->hInstance;
169	Assert(hInstance != 0);
170
171	/* Create our proxy window. */
172	WNDCLASSEX wndClass;
173	RT_ZERO(wndClass);
174
175	wndClass.cbSize = sizeof(WNDCLASSEX);
176	wndClass.lpfnWndProc = vboxDnDWndProc;
177	wndClass.lpszClassName = "VBoxTrayDnDWnd";
178	wndClass.hInstance = hInstance;
179	wndClass.style = CS_NOCLOSE;
180	#ifdef VBOX_DND_DEBUG_WND
181	wndClass.style \|= CS_HREDRAW \| CS_VREDRAW;
182	wndClass.hbrBackground = (HBRUSH)(CreateSolidBrush(RGB(255, 0, 0)));
183	#else
184	wndClass.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1);
185	#endif
186
187	bool fSignalled = false; /* Thread signalled? */
188
189	int rc = VINF_SUCCESS;
190	if (!RegisterClassEx(&wndClass))
191	{
192	DWORD dwErr = GetLastError();
193	LogFlowFunc(("Unable to register proxy window class, error=%ld\n", dwErr));
194	rc = RTErrConvertFromWin32(dwErr);
195	}
196
197	if (RT_SUCCESS(rc))
198	{
199	DWORD dwExStyle = WS_EX_TOOLWINDOW \| WS_EX_TRANSPARENT \| WS_EX_NOACTIVATE;
200	DWORD dwStyle = WS_POPUP;
201	#ifdef VBOX_DND_DEBUG_WND
202	dwExStyle &= ~WS_EX_TRANSPARENT; /* Remove transparency bit. */
203	dwStyle \|= WS_VISIBLE; /* Make the window visible. */
204	#endif
205	pThis->hWnd =
206	CreateWindowEx(dwExStyle,
207	"VBoxTrayDnDWnd", "VBoxTrayDnDWnd",
208	dwStyle,
209	#ifdef VBOX_DND_DEBUG_WND
210	CW_USEDEFAULT, CW_USEDEFAULT, 200, 200, NULL, NULL,
211	#else
212	-200, -200, 100, 100, NULL, NULL,
213	#endif
214	hInstance, pThis /* lParm */);
215	if (!pThis->hWnd)
216	{
217	DWORD dwErr = GetLastError();
218	LogFlowFunc(("Unable to create proxy window, error=%ld\n", dwErr));
219	rc = RTErrConvertFromWin32(dwErr);
220	}
221	else
222	{
223	#ifndef VBOX_DND_DEBUG_WND
224	SetWindowPos(pThis->hWnd, HWND_TOPMOST, -200, -200, 0, 0,
225	SWP_NOACTIVATE \| SWP_HIDEWINDOW
226	\| SWP_NOCOPYBITS \| SWP_NOREDRAW \| SWP_NOSIZE);
227	LogFlowFunc(("Proxy window created, hWnd=0x%x\n", pThis->hWnd));
228	#else
229	LogFlowFunc(("Debug proxy window created, hWnd=0x%x\n", pThis->hWnd));
230
231	/*
232	* Install some mouse tracking.
233	*/
234	TRACKMOUSEEVENT me;
235	RT_ZERO(me);
236	me.cbSize = sizeof(TRACKMOUSEEVENT);
237	me.dwFlags = TME_HOVER \| TME_LEAVE \| TME_NONCLIENT;
238	me.hwndTrack = pThis->hWnd;
239	BOOL fRc = TrackMouseEvent(&me);
240	Assert(fRc);
241	#endif
242	}
243	}
244
245	HRESULT hr = OleInitialize(NULL);
246	if (SUCCEEDED(hr))
247	{
248	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
249	rc = pThis->RegisterAsDropTarget();
250	#endif
251	}
252	else
253	{
254	LogRel(("DnD: Unable to initialize OLE, hr=%Rhrc\n", hr));
255	rc = VERR_COM_UNEXPECTED;
256	}
257
258	if (RT_SUCCESS(rc))
259	{
260	rc = RTThreadUserSignal(hThread);
261	fSignalled = RT_SUCCESS(rc);
262
263	bool fShutdown = false;
264	while (RT_SUCCESS(rc))
265	{
266	MSG uMsg;
267	while (GetMessage(&uMsg, 0, 0, 0))
268	{
269	TranslateMessage(&uMsg);
270	DispatchMessage(&uMsg);
271	}
272
273	if (ASMAtomicReadBool(&pContext->fShutdown))
274	fShutdown = true;
275
276	if (fShutdown)
277	{
278	LogFlowFunc(("Cancelling ...\n"));
279	break;
280	}
281
282	/** @todo Immediately drop on failure? */
283	}
284
285	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
286	int rc2 = pThis->UnregisterAsDropTarget();
287	if (RT_SUCCESS(rc))
288	rc = rc2;
289	#endif
290	OleUninitialize();
291	}
292
293	if (!fSignalled)
294	{
295	int rc2 = RTThreadUserSignal(hThread);
296	AssertRC(rc2);
297	}
298
299	LogFlowFuncLeaveRC(rc);
300	return rc;
301	}
302
303	/**
304	* Monitor enumeration callback for building up a simple bounding
305	* box, capable of holding all enumerated monitors.
306	*
307	* @return BOOL TRUE if enumeration should continue,
308	* FALSE if not.
309	* @param hMonitor Handle to current monitor being enumerated.
310	* @param hdcMonitor The current monitor's DC (device context).
311	* @param lprcMonitor The current monitor's RECT.
312	* @param lParam Pointer to a RECT structure holding the
313	* bounding box to build.
314	*/
315	/* static */
316	BOOL CALLBACK VBoxDnDWnd::MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor,
317	LPRECT lprcMonitor, LPARAM lParam)
318	{
319	LPRECT pRect = (LPRECT)lParam;
320	AssertPtrReturn(pRect, FALSE);
321
322	AssertPtr(lprcMonitor);
323	LogFlowFunc(("Monitor is %ld,%ld,%ld,%ld\n",
324	lprcMonitor->left, lprcMonitor->top,
325	lprcMonitor->right, lprcMonitor->bottom));
326
327	/* Build up a simple bounding box to hold the entire (virtual) screen. */
328	if (pRect->left > lprcMonitor->left)
329	pRect->left = lprcMonitor->left;
330	if (pRect->right < lprcMonitor->right)
331	pRect->right = lprcMonitor->right;
332	if (pRect->top > lprcMonitor->top)
333	pRect->top = lprcMonitor->top;
334	if (pRect->bottom < lprcMonitor->bottom)
335	pRect->bottom = lprcMonitor->bottom;
336
337	return TRUE;
338	}
339
340	/**
341	* The proxy window's WndProc.
342	*/
343	LRESULT CALLBACK VBoxDnDWnd::WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
344	{
345	switch (uMsg)
346	{
347	case WM_CREATE:
348	{
349	int rc = OnCreate();
350	if (RT_FAILURE(rc))
351	return FALSE;
352	return TRUE;
353	}
354
355	case WM_CLOSE:
356	{
357	OnDestroy();
358
359	DestroyWindow(hWnd);
360	PostQuitMessage(0);
361	return 0;
362	}
363
364	case WM_LBUTTONDOWN:
365	LogFlowThisFunc(("WM_LBUTTONDOWN\n"));
366	mfMouseButtonDown = true;
367	return 0;
368
369	case WM_LBUTTONUP:
370	LogFlowThisFunc(("WM_LBUTTONUP\n"));
371	mfMouseButtonDown = false;
372
373	/* As the mouse button was released, Hide the proxy window again.
374	* This can happen if
375	* - the user bumped a guest window to the screen's edges
376	* - there was no drop data from the guest available and the user
377	* enters the guest screen again after this unsuccessful operation */
378	reset();
379	return 0;
380
381	case WM_MOUSELEAVE:
382	LogFlowThisFunc(("WM_MOUSELEAVE\n"));
383	return 0;
384
385	/* Will only be called once; after the first mouse move, this
386	* window will be hidden! */
387	case WM_MOUSEMOVE:
388	{
389	LogFlowThisFunc(("WM_MOUSEMOVE: mfMouseButtonDown=%RTbool, mMode=%ld, mState=%ld\n",
390	mfMouseButtonDown, mMode, mState));
391	#ifdef DEBUG_andy
392	POINT p;
393	GetCursorPos(&p);
394	LogFlowThisFunc(("WM_MOUSEMOVE: curX=%ld, curY=%ld\n", p.x, p.y));
395	#endif
396	int rc = VINF_SUCCESS;
397	if (mMode == HG) /* Host to guest. */
398	{
399	/* Dragging not started yet? Kick it off ... */
400	if ( mfMouseButtonDown
401	&& (mState != Dragging))
402	{
403	mState = Dragging;
404	#if 0
405	/* Delay hiding the proxy window a bit when debugging, to see
406	* whether the desired range is covered correctly. */
407	RTThreadSleep(5000);
408	#endif
409	hide();
410
411	LogFlowThisFunc(("Starting drag'n drop: uAllActions=0x%x, dwOKEffects=0x%x ...\n",
412	uAllActions, startupInfo.dwOKEffects));
413
414	AssertPtr(startupInfo.pDataObject);
415	AssertPtr(startupInfo.pDropSource);
416	DWORD dwEffect;
417	HRESULT hr = DoDragDrop(startupInfo.pDataObject, startupInfo.pDropSource,
418	startupInfo.dwOKEffects, &dwEffect);
419	LogFlowThisFunc(("hr=%Rhrc, dwEffect=%RI32\n", hr, dwEffect));
420	switch (hr)
421	{
422	case DRAGDROP_S_DROP:
423	mState = Dropped;
424	break;
425
426	case DRAGDROP_S_CANCEL:
427	mState = Canceled;
428	break;
429
430	default:
431	LogFlowThisFunc(("Drag'n drop failed with %Rhrc\n", hr));
432	mState = Canceled;
433	rc = VERR_GENERAL_FAILURE; /** @todo Find a better status code. */
434	break;
435	}
436
437	int rc2 = RTCritSectEnter(&mCritSect);
438	if (RT_SUCCESS(rc2))
439	{
440	startupInfo.pDropSource->Release();
441	startupInfo.pDataObject->Release();
442
443	RT_ZERO(startupInfo);
444
445	rc2 = RTCritSectLeave(&mCritSect);
446	if (RT_SUCCESS(rc))
447	rc = rc2;
448	}
449
450	mMode = Unknown;
451	}
452	}
453	else if (mMode == GH) /* Guest to host. */
454	{
455	/* Starting here VBoxDnDDropTarget should
456	* take over; was instantiated when registering
457	* this proxy window as a (valid) drop target. */
458	}
459	else
460	rc = VERR_NOT_SUPPORTED;
461
462	LogFlowThisFunc(("WM_MOUSEMOVE: mMode=%ld, mState=%ld, rc=%Rrc\n",
463	mMode, mState, rc));
464	return 0;
465	}
466
467	case WM_NCMOUSEHOVER:
468	LogFlowThisFunc(("WM_NCMOUSEHOVER\n"));
469	return 0;
470
471	case WM_NCMOUSELEAVE:
472	LogFlowThisFunc(("WM_NCMOUSELEAVE\n"));
473	return 0;
474
475	case WM_VBOXTRAY_DND_MESSAGE:
476	{
477	VBOXDNDEVENT *pEvent = (PVBOXDNDEVENT)lParam;
478	if (!pEvent)
479	break; /* No event received, bail out. */
480
481	LogFlowThisFunc(("Received uType=%RU32, uScreenID=%RU32\n",
482	pEvent->Event.uType, pEvent->Event.uScreenId));
483
484	int rc;
485	switch (pEvent->Event.uType)
486	{
487	case DragAndDropSvc::HOST_DND_HG_EVT_ENTER:
488	{
489	LogFlowThisFunc(("HOST_DND_HG_EVT_ENTER\n"));
490
491	if (pEvent->Event.cbFormats)
492	{
493	RTCList<RTCString> lstFormats =
494	RTCString(pEvent->Event.pszFormats, pEvent->Event.cbFormats - 1).split("\r\n");
495	rc = OnHgEnter(lstFormats, pEvent->Event.u.a.uAllActions);
496	}
497	else
498	{
499	AssertMsgFailed(("cbFormats is 0\n"));
500	rc = VERR_INVALID_PARAMETER;
501	}
502
503	/* Note: After HOST_DND_HG_EVT_ENTER there immediately is a move
504	* event, so fall through is intentional here. */
505	}
506
507	case DragAndDropSvc::HOST_DND_HG_EVT_MOVE:
508	{
509	LogFlowThisFunc(("HOST_DND_HG_EVT_MOVE: %d,%d\n",
510	pEvent->Event.u.a.uXpos, pEvent->Event.u.a.uYpos));
511
512	rc = OnHgMove(pEvent->Event.u.a.uXpos, pEvent->Event.u.a.uYpos,
513	pEvent->Event.u.a.uDefAction);
514	break;
515	}
516
517	case DragAndDropSvc::HOST_DND_HG_EVT_LEAVE:
518	{
519	LogFlowThisFunc(("HOST_DND_HG_EVT_LEAVE\n"));
520
521	rc = OnHgLeave();
522	break;
523	}
524
525	case DragAndDropSvc::HOST_DND_HG_EVT_DROPPED:
526	{
527	LogFlowThisFunc(("HOST_DND_HG_EVT_DROPPED\n"));
528
529	rc = OnHgDrop();
530	break;
531	}
532
533	case DragAndDropSvc::HOST_DND_HG_SND_DATA:
534	{
535	LogFlowThisFunc(("HOST_DND_HG_SND_DATA\n"));
536
537	rc = OnHgDataReceived(pEvent->Event.u.b.pvData,
538	pEvent->Event.u.b.cbData);
539	break;
540	}
541
542	case DragAndDropSvc::HOST_DND_HG_EVT_CANCEL:
543	{
544	LogFlowThisFunc(("HOST_DND_HG_EVT_CANCEL\n"));
545
546	rc = OnHgCancel();
547	break;
548	}
549
550	case DragAndDropSvc::HOST_DND_GH_REQ_PENDING:
551	{
552	LogFlowThisFunc(("HOST_DND_GH_REQ_PENDING\n"));
553	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
554	rc = OnGhIsDnDPending(pEvent->Event.uScreenId);
555
556	#else
557	rc = VERR_NOT_SUPPORTED;
558	#endif
559	break;
560	}
561
562	case DragAndDropSvc::HOST_DND_GH_EVT_DROPPED:
563	{
564	LogFlowThisFunc(("HOST_DND_GH_EVT_DROPPED\n"));
565	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
566	rc = OnGhDropped(pEvent->Event.pszFormats,
567	pEvent->Event.cbFormats,
568	pEvent->Event.u.a.uDefAction);
569	#else
570	rc = VERR_NOT_SUPPORTED;
571	#endif
572	break;
573	}
574
575	default:
576	rc = VERR_NOT_SUPPORTED;
577	break;
578	}
579
580	/* Some messages require cleanup. */
581	switch (pEvent->Event.uType)
582	{
583	case DragAndDropSvc::HOST_DND_HG_EVT_ENTER:
584	case DragAndDropSvc::HOST_DND_HG_EVT_MOVE:
585	case DragAndDropSvc::HOST_DND_HG_EVT_DROPPED:
586	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
587	case DragAndDropSvc::HOST_DND_GH_EVT_DROPPED:
588	#endif
589	{
590	if (pEvent->Event.pszFormats)
591	RTMemFree(pEvent->Event.pszFormats);
592	break;
593	}
594
595	case DragAndDropSvc::HOST_DND_HG_SND_DATA:
596	{
597	if (pEvent->Event.pszFormats)
598	RTMemFree(pEvent->Event.pszFormats);
599	if (pEvent->Event.u.b.pvData)
600	RTMemFree(pEvent->Event.u.b.pvData);
601	break;
602	}
603
604	default:
605	/* Ignore. */
606	break;
607	}
608
609	if (pEvent)
610	{
611	LogFlowThisFunc(("Processing event %RU32 resulted in rc=%Rrc\n",
612	pEvent->Event.uType, rc));
613
614	RTMemFree(pEvent);
615	}
616	return 0;
617	}
618
619	default:
620	break;
621	}
622
623	return DefWindowProc(hWnd, uMsg, wParam, lParam);
624	}
625
626	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
627	/**
628	* Registers this proxy window as a local drop target.
629	*
630	* @return IPRT status code.
631	*/
632	int VBoxDnDWnd::RegisterAsDropTarget(void)
633	{
634	if (pDropTarget) /* Already registered as drop target? */
635	return VINF_SUCCESS;
636
637	int rc;
638	try
639	{
640	pDropTarget = new VBoxDnDDropTarget(this /* pParent */);
641	AssertPtr(pDropTarget);
642	HRESULT hr = CoLockObjectExternal(pDropTarget, TRUE /* fLock */,
643	FALSE /* fLastUnlockReleases */);
644	if (SUCCEEDED(hr))
645	hr = RegisterDragDrop(hWnd, pDropTarget);
646
647	if (FAILED(hr))
648	{
649	LogRel(("DnD: Creating drop target failed with hr=%Rhrc\n", hr));
650	rc = VERR_GENERAL_FAILURE; /** @todo Find a better rc. */
651	}
652	else
653	{
654	rc = VINF_SUCCESS;
655	}
656	}
657	catch (std::bad_alloc)
658	{
659	rc = VERR_NO_MEMORY;
660	}
661
662	LogFlowFuncLeaveRC(rc);
663	return rc;
664	}
665
666	/**
667	* Unregisters this proxy as a drop target.
668	*
669	* @return IPRT status code.
670	*/
671	int VBoxDnDWnd::UnregisterAsDropTarget(void)
672	{
673	LogFlowFuncEnter();
674
675	if (!pDropTarget) /* No drop target? Bail out. */
676	return VINF_SUCCESS;
677
678	HRESULT hr = RevokeDragDrop(hWnd);
679	if (SUCCEEDED(hr))
680	hr = CoLockObjectExternal(pDropTarget, FALSE /* fLock */,
681	TRUE /* fLastUnlockReleases */);
682	if (SUCCEEDED(hr))
683	{
684	ULONG cRefs = pDropTarget->Release();
685
686	Assert(cRefs == 0);
687	pDropTarget = NULL;
688	}
689
690	int rc = SUCCEEDED(hr)
691	? VINF_SUCCESS : VERR_GENERAL_FAILURE; /** @todo Fix this. */
692
693	LogFlowFuncLeaveRC(rc);
694	return rc;
695	}
696	#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
697
698	/**
699	* Handles the creation of a proxy window.
700	*
701	* @return IPRT status code.
702	*/
703	int VBoxDnDWnd::OnCreate(void)
704	{
705	int rc = VbglR3DnDConnect(&mClientID);
706	if (RT_FAILURE(rc))
707	{
708	LogFlowThisFunc(("Connection to host service failed, rc=%Rrc\n", rc));
709	return rc;
710	}
711
712	LogFlowThisFunc(("Client ID=%RU32, rc=%Rrc\n", mClientID, rc));
713	return rc;
714	}
715
716	/**
717	* Handles the destruction of a proxy window.
718	*/
719	void VBoxDnDWnd::OnDestroy(void)
720	{
721	VbglR3DnDDisconnect(mClientID);
722	LogFlowThisFuncLeave();
723	}
724
725	/**
726	* Handles actions required when the host cursor enters
727	* the guest's screen to initiate a host -> guest DnD operation.
728	*
729	* @return IPRT status code.
730	* @param lstFormats Supported formats offered by the host.
731	* @param uAllActions Supported actions offered by the host.
732	*/
733	int VBoxDnDWnd::OnHgEnter(const RTCList<RTCString> &lstFormats, uint32_t uAllActions)
734	{
735	if (mMode == GH) /* Wrong mode? Bail out. */
736	return VERR_WRONG_ORDER;
737
738	#ifdef DEBUG
739	LogFlowThisFunc(("uActions=0x%x, lstFormats=%zu: ", uAllActions, lstFormats.size()));
740	for (size_t i = 0; i < lstFormats.size(); i++)
741	LogFlow(("'%s' ", lstFormats.at(i).c_str()));
742	LogFlow(("\n"));
743	#endif
744
745	reset();
746	setMode(HG);
747
748	/* Save all allowed actions. */
749	this->uAllActions = uAllActions;
750
751	/*
752	* Check if requested formats are compatible with this client.
753	*/
754	LogFlowThisFunc(("Supported formats:\n"));
755	for (size_t i = 0; i < lstFormats.size(); i++)
756	{
757	bool fSupported = this->lstAllowedFormats.contains(lstFormats.at(i));
758	if (fSupported)
759	this->lstFormats.append(lstFormats.at(i));
760	LogFlowThisFunc(("\t%s: %RTbool\n", lstFormats.at(i).c_str(), fSupported));
761	}
762
763	/*
764	* Prepare the startup info for DoDragDrop().
765	*/
766	int rc = VINF_SUCCESS;
767	try
768	{
769	/* Translate our drop actions into
770	* allowed Windows drop effects. */
771	startupInfo.dwOKEffects = DROPEFFECT_NONE;
772	if (uAllActions)
773	{
774	if (uAllActions & DND_COPY_ACTION)
775	startupInfo.dwOKEffects \|= DROPEFFECT_COPY;
776	if (uAllActions & DND_MOVE_ACTION)
777	startupInfo.dwOKEffects \|= DROPEFFECT_MOVE;
778	if (uAllActions & DND_LINK_ACTION)
779	startupInfo.dwOKEffects \|= DROPEFFECT_LINK;
780	}
781
782	startupInfo.pDropSource = new VBoxDnDDropSource(this);
783	startupInfo.pDataObject = new VBoxDnDDataObject();
784	}
785	catch (std::bad_alloc)
786	{
787	rc = VERR_NO_MEMORY;
788	}
789
790	if (RT_SUCCESS(rc))
791	rc = makeFullscreen();
792
793	LogFlowFuncLeaveRC(rc);
794	return rc;
795	}
796
797	/**
798	* Handles actions required when the host cursor moves inside
799	* the guest's screen.
800	*
801	* @return IPRT status code.
802	* @param u32xPos Absolute X position (in pixels) of the host cursor
803	* inside the guest.
804	* @param u32yPos Absolute Y position (in pixels) of the host cursor
805	* inside the guest.
806	* @param uAction Action the host wants to perform while moving.
807	* Currently ignored.
808	*/
809	int VBoxDnDWnd::OnHgMove(uint32_t u32xPos, uint32_t u32yPos, uint32_t uAction)
810	{
811	int rc;
812
813	uint32_t uActionNotify = DND_IGNORE_ACTION;
814	if (mMode == HG)
815	{
816	LogFlowThisFunc(("u32xPos=%RU32, u32yPos=%RU32, uAction=0x%x\n",
817	u32xPos, u32yPos, uAction));
818
819	rc = mouseMove(u32xPos, u32yPos, MOUSEEVENTF_LEFTDOWN);
820
821	if (RT_SUCCESS(rc))
822	rc = RTCritSectEnter(&mCritSect);
823	if (RT_SUCCESS(rc))
824	{
825	if ( (Dragging == mState)
826	&& startupInfo.pDropSource)
827	uActionNotify = startupInfo.pDropSource->GetCurrentAction();
828
829	RTCritSectLeave(&mCritSect);
830	}
831	}
832	else /* Just acknowledge the operation with an ignore action. */
833	rc = VINF_SUCCESS;
834
835	if (RT_SUCCESS(rc))
836	{
837	rc = VbglR3DnDHGAcknowledgeOperation(mClientID, uActionNotify);
838	if (RT_FAILURE(rc))
839	LogFlowThisFunc(("Acknowledging operation failed with rc=%Rrc\n", rc));
840	}
841
842	LogFlowThisFunc(("Returning uActionNotify=0x%x, rc=%Rrc\n", uActionNotify, rc));
843	return rc;
844	}
845
846	/**
847	* Handles actions required when the host cursor leaves
848	* the guest's screen again.
849	*
850	* @return IPRT status code.
851	*/
852	int VBoxDnDWnd::OnHgLeave(void)
853	{
854	if (mMode == GH) /* Wrong mode? Bail out. */
855	return VERR_WRONG_ORDER;
856
857	LogFlowThisFunc(("mMode=%ld, mState=%RU32\n", mMode, mState));
858	LogRel(("DnD: Drag'n drop operation aborted\n"));
859
860	reset();
861
862	int rc = VINF_SUCCESS;
863
864	/* Post ESC to our window to officially abort the
865	* drag'n drop operation. */
866	PostMessage(hWnd, WM_KEYDOWN, VK_ESCAPE, 0 /* lParam */);
867
868	LogFlowFuncLeaveRC(rc);
869	return rc;
870	}
871
872	/**
873	* Handles actions required when the host cursor wants to drop
874	* and therefore start a "drop" action in the guest.
875	*
876	* @return IPRT status code.
877	*/
878	int VBoxDnDWnd::OnHgDrop(void)
879	{
880	if (mMode == GH)
881	return VERR_WRONG_ORDER;
882
883	LogFlowThisFunc(("mMode=%ld, mState=%RU32\n", mMode, mState));
884
885	int rc = VINF_SUCCESS;
886	if (mState == Dragging)
887	{
888	Assert(lstFormats.size() >= 1);
889
890	/** @todo What to do when multiple formats are available? */
891	mFormatRequested = lstFormats.at(0);
892
893	rc = RTCritSectEnter(&mCritSect);
894	if (RT_SUCCESS(rc))
895	{
896	if (startupInfo.pDataObject)
897	startupInfo.pDataObject->SetStatus(VBoxDnDDataObject::Dropping);
898	else
899	rc = VERR_NOT_FOUND;
900
901	RTCritSectLeave(&mCritSect);
902	}
903
904	if (RT_SUCCESS(rc))
905	{
906	LogRel(("DnD: Requesting data as '%s' ...\n", mFormatRequested.c_str()));
907	rc = VbglR3DnDHGRequestData(mClientID, mFormatRequested.c_str());
908	if (RT_FAILURE(rc))
909	LogFlowThisFunc(("Requesting data failed with rc=%Rrc\n", rc));
910	}
911	}
912
913	LogFlowFuncLeaveRC(rc);
914	return rc;
915	}
916
917	/**
918	* Handles actions required when the host has sent over DnD data
919	* to the guest after a "drop" event.
920	*
921	* @return IPRT status code.
922	* @param pvData Pointer to raw data received.
923	* @param cbData Size of data (in bytes) received.
924	*/
925	int VBoxDnDWnd::OnHgDataReceived(const void *pvData, uint32_t cbData)
926	{
927	LogFlowThisFunc(("mState=%ld, pvData=%p, cbData=%RU32\n",
928	mState, pvData, cbData));
929
930	mState = Dropped;
931
932	int rc = VINF_SUCCESS;
933	if (pvData)
934	{
935	Assert(cbData);
936	rc = RTCritSectEnter(&mCritSect);
937	if (RT_SUCCESS(rc))
938	{
939	if (startupInfo.pDataObject)
940	rc = startupInfo.pDataObject->Signal(mFormatRequested, pvData, cbData);
941	else
942	rc = VERR_NOT_FOUND;
943
944	RTCritSectLeave(&mCritSect);
945	}
946	}
947
948	int rc2 = mouseRelease();
949	if (RT_SUCCESS(rc))
950	rc = rc2;
951
952	LogFlowFuncLeaveRC(rc);
953	return rc;
954	}
955
956	/**
957	* Handles actions required when the host wants to cancel an action
958	* host -> guest operation.
959	*
960	* @return IPRT status code.
961	*/
962	int VBoxDnDWnd::OnHgCancel(void)
963	{
964	int rc = RTCritSectEnter(&mCritSect);
965	if (RT_SUCCESS(rc))
966	{
967	if (startupInfo.pDataObject)
968	startupInfo.pDataObject->Abort();
969
970	RTCritSectLeave(&mCritSect);
971	}
972
973	int rc2 = mouseRelease();
974	if (RT_SUCCESS(rc))
975	rc = rc2;
976
977	reset();
978
979	return rc;
980	}
981
982	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
983	/**
984	* Handles actions required to start a guest -> host DnD operation.
985	* This works by letting the host ask whether a DnD operation is pending
986	* on the guest. The guest must not know anything about the host's DnD state
987	* and/or operations due to security reasons.
988	*
989	* To capture a pending DnD operation on the guest which then can be communicated
990	* to the host the proxy window needs to be registered as a drop target. This drop
991	* target then will act as a proxy target between the guest OS and the host. In other
992	* words, the guest OS will use this proxy target as a regular (invisible) window
993	* which can be used by the regular guest OS' DnD mechanisms, independently of the
994	* host OS. To make sure this proxy target is able receive an in-progress DnD operation
995	* on the guest, it will be shown invisibly across all active guest OS screens. Just
996	* think of an opened umbrella across all screens here.
997	*
998	* As soon as the proxy target and its underlying data object receive appropriate
999	* DnD messages they'll be hidden again, and the control will be transferred back
1000	* this class again.
1001	*
1002	* @return IPRT status code.
1003	* @param uScreenID Screen ID the host wants to query a pending operation
1004	* for. Currently not used/needed here.
1005	*/
1006	int VBoxDnDWnd::OnGhIsDnDPending(uint32_t uScreenID)
1007	{
1008	LogFlowThisFunc(("mMode=%ld, mState=%ld, uScreenID=%RU32\n",
1009	mMode, mState, uScreenID));
1010
1011	if (mMode == Unknown)
1012	setMode(GH);
1013
1014	if (mMode != GH)
1015	return VERR_WRONG_ORDER;
1016
1017	if (mState == Uninitialized)
1018	{
1019	/* Nothing to do here yet. */
1020	mState = Initialized;
1021	}
1022
1023	int rc;
1024	if (mState == Initialized)
1025	{
1026	rc = makeFullscreen();
1027	if (RT_SUCCESS(rc))
1028	{
1029	/*
1030	* We have to release the left mouse button to
1031	* get into our (invisible) proxy window.
1032	*/
1033	mouseRelease();
1034
1035	/*
1036	* Even if we just released the left mouse button
1037	* we're still in the dragging state to handle our
1038	* own drop target (for the host).
1039	*/
1040	mState = Dragging;
1041	}
1042	}
1043	else
1044	rc = VINF_SUCCESS;
1045
1046	/**
1047	* Some notes regarding guest cursor movement:
1048	* - The host only sends an HOST_DND_GH_REQ_PENDING message to the guest
1049	* if the mouse cursor is outside the VM's window.
1050	* - The guest does not know anything about the host's cursor
1051	* position / state due to security reasons.
1052	* - The guest only knows that the host currently is asking whether a
1053	* guest DnD operation is in progress.
1054	*/
1055
1056	if ( RT_SUCCESS(rc)
1057	&& mState == Dragging)
1058	{
1059	/** @todo Put this block into a function! */
1060	POINT p;
1061	GetCursorPos(&p);
1062	ClientToScreen(hWnd, &p);
1063	#ifdef DEBUG_andy
1064	LogFlowThisFunc(("Client to screen curX=%ld, curY=%ld\n", p.x, p.y));
1065	#endif
1066
1067	/** @todo Multi-monitor setups? */
1068	int iScreenX = GetSystemMetrics(SM_CXSCREEN) - 1;
1069	int iScreenY = GetSystemMetrics(SM_CYSCREEN) - 1;
1070
1071	static LONG px = p.x;
1072	if (px <= 0)
1073	px = 1;
1074	static LONG py = p.y;
1075	if (py <= 0)
1076	py = 1;
1077
1078	rc = mouseMove(px, py, 0 /* dwMouseInputFlags */);
1079	}
1080
1081	if (RT_SUCCESS(rc))
1082	{
1083	uint32_t uDefAction = DND_IGNORE_ACTION;
1084
1085	AssertPtr(pDropTarget);
1086	RTCString strFormats = pDropTarget->Formats();
1087	if (!strFormats.isEmpty())
1088	{
1089	uDefAction = DND_COPY_ACTION;
1090
1091	LogFlowFunc(("Acknowledging pDropTarget=0x%p, uDefAction=0x%x, uAllActions=0x%x, strFormats=%s\n",
1092	pDropTarget, uDefAction, uAllActions, strFormats.c_str()));
1093	}
1094	else
1095	{
1096	strFormats = "unknown"; /* Prevent VERR_IO_GEN_FAILURE for IOCTL. */
1097	LogFlowFunc(("No format data available yet\n"));
1098	}
1099
1100	/** @todo Support more than one action at a time. */
1101	uAllActions = uDefAction;
1102
1103	rc = VbglR3DnDGHAcknowledgePending(mClientID,
1104	uDefAction, uAllActions, strFormats.c_str());
1105	if (RT_FAILURE(rc))
1106	{
1107	char szMsg[256]; /* Sizes according to MSDN. */
1108	char szTitle[64];
1109
1110	/** @todo Add some i18l tr() macros here. */
1111	RTStrPrintf(szTitle, sizeof(szTitle), "VirtualBox Guest Additions Drag'n Drop");
1112	RTStrPrintf(szMsg, sizeof(szMsg), "Drag'n drop to the host either is not supported or disabled. "
1113	"Please enable Guest to Host or Bidirectional drag'n drop mode "
1114	"or re-install the VirtualBox Guest Additions.");
1115	switch (rc)
1116	{
1117	case VERR_ACCESS_DENIED:
1118	rc = hlpShowBalloonTip(ghInstance, ghwndToolWindow, ID_TRAYICON,
1119	szMsg, szTitle,
1120	15 * 1000 /* Time to display in msec */, NIIF_INFO);
1121	AssertRC(rc);
1122	break;
1123
1124	default:
1125	break;
1126	}
1127	}
1128	}
1129
1130	if (RT_FAILURE(rc))
1131	reset(); /* Reset state on failure. */
1132
1133	LogFlowFuncLeaveRC(rc);
1134	return rc;
1135	}
1136
1137	/**
1138	* Handles actions required to let the guest know that the host
1139	* started a "drop" action on the host. This will tell the guest
1140	* to send data in a specific format the host requested.
1141	*
1142	* @return IPRT status code.
1143	* @param pszFormat Format the host requests the data in.
1144	* @param cbFormat Size (in bytes) of format string.
1145	* @param uDefAction Default action on the host.
1146	*/
1147	int VBoxDnDWnd::OnGhDropped(const char *pszFormat, uint32_t cbFormat,
1148	uint32_t uDefAction)
1149	{
1150	AssertPtrReturn(pszFormat, VERR_INVALID_POINTER);
1151	AssertReturn(cbFormat, VERR_INVALID_PARAMETER);
1152
1153	LogFlowThisFunc(("mMode=%ld, mState=%ld, pDropTarget=0x%p, pszFormat=%s, uDefAction=0x%x\n",
1154	mMode, mState, pDropTarget, pszFormat, uDefAction));
1155	int rc;
1156	if (mMode == GH)
1157	{
1158	if (mState == Dragging)
1159	{
1160	AssertPtr(pDropTarget);
1161	rc = pDropTarget->WaitForDrop(30 * 1000 /* Timeout in ms */);
1162
1163	reset();
1164	}
1165	else if (mState == Dropped)
1166	{
1167	rc = VINF_SUCCESS;
1168	}
1169	else
1170	rc = VERR_WRONG_ORDER;
1171
1172	if (RT_SUCCESS(rc))
1173	{
1174	/** @todo Respect uDefAction. */
1175	void *pvData = pDropTarget->DataMutableRaw();
1176	AssertPtr(pvData);
1177	uint32_t cbData = pDropTarget->DataSize();
1178	Assert(cbData);
1179
1180	rc = VbglR3DnDGHSendData(mClientID, pszFormat, pvData, cbData);
1181	LogFlowFunc(("Sent pvData=0x%p, cbData=%RU32, rc=%Rrc\n",
1182	pvData, cbData, rc));
1183
1184
1185	}
1186	}
1187	else
1188	rc = VERR_WRONG_ORDER;
1189
1190	LogFlowFuncLeaveRC(rc);
1191	return rc;
1192	}
1193	#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
1194
1195	/**
1196	* Injects a DnD event in this proxy window's Windows
1197	* event queue. The (allocated) event will be deleted by
1198	* this class after processing.
1199	*
1200	* @return IPRT status code.
1201	* @param pEvent Event to inject.
1202	*/
1203	int VBoxDnDWnd::ProcessEvent(PVBOXDNDEVENT pEvent)
1204	{
1205	AssertPtrReturn(pEvent, VERR_INVALID_POINTER);
1206
1207	BOOL fRc = PostMessage(hWnd, WM_VBOXTRAY_DND_MESSAGE,
1208	0 /* wParm /, (LPARAM)pEvent / lParm */);
1209	if (!fRc)
1210	{
1211	static int s_iBitchedAboutFailedDnDMessages = 0;
1212	if (s_iBitchedAboutFailedDnDMessages++ < 10)
1213	{
1214	DWORD dwErr = GetLastError();
1215	LogRel(("DnD: Processing event %p failed with %ld (%Rrc), skpping\n",
1216	pEvent, dwErr, RTErrConvertFromWin32(dwErr)));
1217	}
1218
1219	RTMemFree(pEvent);
1220	pEvent = NULL;
1221
1222	return VERR_NO_MEMORY;
1223	}
1224
1225	return VINF_SUCCESS;
1226	}
1227
1228	/**
1229	* Hides the proxy window again.
1230	*
1231	* @return IPRT status code.
1232	*/
1233	int VBoxDnDWnd::hide(void)
1234	{
1235	#ifdef DEBUG_andy
1236	LogFlowFunc(("\n"));
1237	#endif
1238	ShowWindow(hWnd, SW_HIDE);
1239
1240	return VINF_SUCCESS;
1241	}
1242
1243	/**
1244	* Shows the (invisible) proxy window in fullscreen,
1245	* spawned across all active guest monitors.
1246	*
1247	* @return IPRT status code.
1248	*/
1249	int VBoxDnDWnd::makeFullscreen(void)
1250	{
1251	int rc = VINF_SUCCESS;
1252
1253	RECT r;
1254	RT_ZERO(r);
1255
1256	BOOL fRc;
1257	HDC hDC = GetDC(NULL /* Entire screen */);
1258	if (hDC)
1259	{
1260	fRc = s_pfnEnumDisplayMonitors
1261	/* EnumDisplayMonitors is not available on NT4. */
1262	? s_pfnEnumDisplayMonitors(hDC, NULL, VBoxDnDWnd::MonitorEnumProc, (LPARAM)&r):
1263	FALSE;
1264
1265	if (!fRc)
1266	rc = VERR_NOT_FOUND;
1267	ReleaseDC(NULL, hDC);
1268	}
1269	else
1270	rc = VERR_ACCESS_DENIED;
1271
1272	if (RT_FAILURE(rc))
1273	{
1274	/* If multi-monitor enumeration failed above, try getting at least the
1275	* primary monitor as a fallback. */
1276	r.left = 0;
1277	r.top = 0;
1278	r.right = GetSystemMetrics(SM_CXSCREEN);
1279	r.bottom = GetSystemMetrics(SM_CYSCREEN);
1280	rc = VINF_SUCCESS;
1281	}
1282
1283	if (RT_SUCCESS(rc))
1284	{
1285	LONG lStyle = GetWindowLong(hWnd, GWL_STYLE);
1286	SetWindowLong(hWnd, GWL_STYLE,
1287	lStyle & ~(WS_CAPTION \| WS_THICKFRAME));
1288	LONG lExStyle = GetWindowLong(hWnd, GWL_EXSTYLE);
1289	SetWindowLong(hWnd, GWL_EXSTYLE,
1290	lExStyle & ~( WS_EX_DLGMODALFRAME \| WS_EX_WINDOWEDGE
1291	\| WS_EX_CLIENTEDGE \| WS_EX_STATICEDGE));
1292
1293	fRc = SetWindowPos(hWnd, HWND_TOPMOST,
1294	r.left,
1295	r.top,
1296	r.right - r.left,
1297	r.bottom - r.top,
1298	#ifdef VBOX_DND_DEBUG_WND
1299	SWP_SHOWWINDOW \| SWP_FRAMECHANGED);
1300	#else
1301	SWP_SHOWWINDOW \| SWP_NOOWNERZORDER \| SWP_NOREDRAW \| SWP_NOACTIVATE);
1302	#endif
1303	if (fRc)
1304	{
1305	LogFlowFunc(("Virtual screen is %ld,%ld,%ld,%ld (%ld x %ld)\n",
1306	r.left, r.top, r.right, r.bottom,
1307	r.right - r.left, r.bottom - r.top));
1308	}
1309	else
1310	{
1311	DWORD dwErr = GetLastError();
1312	LogRel(("DnD: Failed to set proxy window position, rc=%Rrc\n",
1313	RTErrConvertFromWin32(dwErr)));
1314	}
1315	}
1316	else
1317	LogRel(("DnD: Failed to determine virtual screen size, rc=%Rrc\n", rc));
1318
1319	LogFlowFuncLeaveRC(rc);
1320	return rc;
1321	}
1322
1323	/**
1324	* Moves the guest mouse cursor to a specific position.
1325	*
1326	* @return IPRT status code.
1327	* @param x X position (in pixels) to move cursor to.
1328	* @param y Y position (in pixels) to move cursor to.
1329	* @param dwMouseInputFlags Additional movement flags. @sa MOUSEEVENTF_ flags.
1330	*/
1331	int VBoxDnDWnd::mouseMove(int x, int y, DWORD dwMouseInputFlags)
1332	{
1333	int iScreenX = GetSystemMetrics(SM_CXSCREEN) - 1;
1334	int iScreenY = GetSystemMetrics(SM_CYSCREEN) - 1;
1335
1336	INPUT Input[1] = { 0 };
1337	Input[0].type = INPUT_MOUSE;
1338	Input[0].mi.dwFlags = MOUSEEVENTF_MOVE \| MOUSEEVENTF_ABSOLUTE
1339	\| dwMouseInputFlags;
1340	Input[0].mi.dx = x * (65535 / iScreenX);
1341	Input[0].mi.dy = y * (65535 / iScreenY);
1342
1343	int rc;
1344	if (s_pfnSendInput(1 /* Number of inputs */,
1345	Input, sizeof(INPUT)))
1346	{
1347	#ifdef DEBUG_andy
1348	CURSORINFO ci;
1349	RT_ZERO(ci);
1350	ci.cbSize = sizeof(ci);
1351	BOOL fRc = GetCursorInfo(&ci);
1352	if (fRc)
1353	LogFlowThisFunc(("Cursor shown=%RTbool, cursor=0x%p, x=%d, y=%d\n",
1354	(ci.flags & CURSOR_SHOWING) ? true : false,
1355	ci.hCursor, ci.ptScreenPos.x, ci.ptScreenPos.y));
1356	#endif
1357	rc = VINF_SUCCESS;
1358	}
1359	else
1360	{
1361	DWORD dwErr = GetLastError();
1362	rc = RTErrConvertFromWin32(dwErr);
1363	LogFlowFunc(("SendInput failed with rc=%Rrc\n", rc));
1364	}
1365
1366	return rc;
1367	}
1368
1369	/**
1370	* Releases a previously pressed left guest mouse button.
1371	*
1372	* @return IPRT status code.
1373	*/
1374	int VBoxDnDWnd::mouseRelease(void)
1375	{
1376	#ifdef DEBUG_andy
1377	LogFlowFunc(("\n"));
1378	#endif
1379	int rc;
1380
1381	/* Release mouse button in the guest to start the "drop"
1382	* action at the current mouse cursor position. */
1383	INPUT Input[1] = { 0 };
1384	Input[0].type = INPUT_MOUSE;
1385	Input[0].mi.dwFlags = MOUSEEVENTF_LEFTUP;
1386	if (!s_pfnSendInput(1, Input, sizeof(INPUT)))
1387	{
1388	DWORD dwErr = GetLastError();
1389	rc = RTErrConvertFromWin32(dwErr);
1390	LogFlowFunc(("SendInput failed with rc=%Rrc\n", rc));
1391	}
1392	else
1393	rc = VINF_SUCCESS;
1394
1395	return rc;
1396	}
1397
1398	/**
1399	* Resets the proxy window.
1400	*/
1401	void VBoxDnDWnd::reset(void)
1402	{
1403	LogFlowThisFunc(("Resetting, old mMode=%ld, mState=%ld\n",
1404	mMode, mState));
1405
1406	lstAllowedFormats.clear();
1407	lstFormats.clear();
1408	uAllActions = DND_IGNORE_ACTION;
1409
1410	int rc2 = setMode(Unknown);
1411	AssertRC(rc2);
1412
1413	hide();
1414	}
1415
1416	/**
1417	* Sets the current operation mode of this proxy window.
1418	*
1419	* @return IPRT status code.
1420	* @param enmMode New mode to set.
1421	*/
1422	int VBoxDnDWnd::setMode(Mode enmMode)
1423	{
1424	LogFlowThisFunc(("Old mode=%ld, new mode=%ld\n",
1425	mMode, enmMode));
1426
1427	mMode = enmMode;
1428	mState = Initialized;
1429
1430	return VINF_SUCCESS;
1431	}
1432
1433	/**
1434	* Static helper function for having an own WndProc for proxy
1435	* window instances.
1436	*/
1437	static LRESULT CALLBACK vboxDnDWndProcInstance(HWND hWnd, UINT uMsg,
1438	WPARAM wParam, LPARAM lParam)
1439	{
1440	LONG_PTR pUserData = GetWindowLongPtr(hWnd, GWLP_USERDATA);
1441	AssertPtrReturn(pUserData, 0);
1442
1443	VBoxDnDWnd pWnd = reinterpret_cast<VBoxDnDWnd >(pUserData);
1444	if (pWnd)
1445	return pWnd->WndProc(hWnd, uMsg, wParam, lParam);
1446
1447	return 0;
1448	}
1449
1450	/**
1451	* Static helper function for routing Windows messages to a specific
1452	* proxy window instance.
1453	*/
1454	static LRESULT CALLBACK vboxDnDWndProc(HWND hWnd, UINT uMsg,
1455	WPARAM wParam, LPARAM lParam)
1456	{
1457	/* Note: WM_NCCREATE is not the first ever message which arrives, but
1458	* early enough for us. */
1459	if (uMsg == WM_NCCREATE)
1460	{
1461	LPCREATESTRUCT pCS = (LPCREATESTRUCT)lParam;
1462	AssertPtr(pCS);
1463	SetWindowLongPtr(hWnd, GWLP_USERDATA, (LONG_PTR)pCS->lpCreateParams);
1464	SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)vboxDnDWndProcInstance);
1465
1466	return vboxDnDWndProcInstance(hWnd, uMsg, wParam, lParam);
1467	}
1468
1469	/* No window associated yet. */
1470	return DefWindowProc(hWnd, uMsg, wParam, lParam);
1471	}
1472
1473	/**
1474	* Initializes drag'n drop.
1475	*
1476	* @return IPRT status code.
1477	* @param pEnv The DnD service's environment.
1478	* @param ppInstance The instance pointer which refer to this object.
1479	* @param pfStartThread Pointer to flag whether the DnD service can be started or not.
1480	*/
1481	int VBoxDnDInit(const VBOXSERVICEENV pEnv, void ppInstance, bool pfStartThread)
1482	{
1483	AssertPtrReturn(pEnv, VERR_INVALID_POINTER);
1484	/** ppInstance not used here. */
1485	AssertPtrReturn(pfStartThread, VERR_INVALID_POINTER);
1486
1487	LogFlowFuncEnter();
1488
1489	*pfStartThread = false;
1490
1491	PVBOXDNDCONTEXT pCtx = &gCtx;
1492
1493	int rc;
1494	bool fSupportedOS = true;
1495
1496	s_pfnSendInput = (PFNSENDINPUT)
1497	RTLdrGetSystemSymbol("User32.dll", "SendInput");
1498	fSupportedOS = !RT_BOOL(s_pfnSendInput == NULL);
1499	s_pfnEnumDisplayMonitors = (PFNENUMDISPLAYMONITORS)
1500	RTLdrGetSystemSymbol("User32.dll", "EnumDisplayMonitors");
1501	/* g_pfnEnumDisplayMonitors is optional. */
1502
1503	if (!fSupportedOS)
1504	{
1505	LogRel(("DnD: Not supported Windows version, disabling drag'n drop support\n"));
1506	rc = VERR_NOT_SUPPORTED;
1507	}
1508	else
1509	rc = VINF_SUCCESS;
1510
1511	if (RT_SUCCESS(rc))
1512	{
1513	/* Assign service environment to our context. */
1514	pCtx->pEnv = pEnv;
1515
1516	/* Create the proxy window. At the moment we
1517	* only support one window at a time. */
1518	VBoxDnDWnd *pWnd = NULL;
1519	try
1520	{
1521	pWnd = new VBoxDnDWnd();
1522	rc = pWnd->Initialize(pCtx);
1523
1524	/* Add proxy window to our proxy windows list. */
1525	if (RT_SUCCESS(rc))
1526	pCtx->lstWnd.append(pWnd);
1527	}
1528	catch (std::bad_alloc)
1529	{
1530	rc = VERR_NO_MEMORY;
1531	}
1532	}
1533
1534	if (RT_SUCCESS(rc))
1535	rc = RTSemEventCreate(&pCtx->hEvtQueueSem);
1536	if (RT_SUCCESS(rc))
1537	{
1538	*ppInstance = pCtx;
1539	*pfStartThread = true;
1540
1541	LogRel(("DnD: Drag'n drop service successfully started\n"));
1542	return VINF_SUCCESS;
1543	}
1544
1545	LogRel(("DnD: Initializing drag'n drop service failed with rc=%Rrc\n", rc));
1546	return rc;
1547	}
1548
1549	void VBoxDnDStop(const VBOXSERVICEENV pEnv, void pInstance)
1550	{
1551	AssertPtrReturnVoid(pEnv);
1552	AssertPtrReturnVoid(pInstance);
1553
1554	LogFunc(("Stopping pInstance=%p\n", pInstance));
1555
1556	PVBOXDNDCONTEXT pCtx = (PVBOXDNDCONTEXT)pInstance;
1557	AssertPtr(pCtx);
1558
1559	/* Set shutdown indicator. */
1560	ASMAtomicWriteBool(&pCtx->fShutdown, true);
1561	}
1562
1563	void VBoxDnDDestroy(const VBOXSERVICEENV pEnv, void pInstance)
1564	{
1565	AssertPtr(pEnv);
1566	AssertPtr(pInstance);
1567
1568	LogFunc(("Destroying pInstance=%p\n", pInstance));
1569
1570	PVBOXDNDCONTEXT pCtx = (PVBOXDNDCONTEXT)pInstance;
1571	AssertPtr(pCtx);
1572
1573	int rc = VINF_SUCCESS;
1574
1575	/** @todo At the moment we only have one DnD proxy window. */
1576	Assert(pCtx->lstWnd.size() == 1);
1577	VBoxDnDWnd *pWnd = pCtx->lstWnd.first();
1578	if (pWnd)
1579	delete pWnd;
1580
1581	if (pCtx->hEvtQueueSem != NIL_RTSEMEVENT)
1582	RTSemEventDestroy(pCtx->hEvtQueueSem);
1583
1584	LogFunc(("Destroyed pInstance=%p, rc=%Rrc\n",
1585	pInstance, rc));
1586	}
1587
1588	unsigned __stdcall VBoxDnDThread(void *pInstance)
1589	{
1590	LogFlowFunc(("pInstance=%p\n", pInstance));
1591
1592	PVBOXDNDCONTEXT pCtx = (PVBOXDNDCONTEXT)pInstance;
1593	AssertPtr(pCtx);
1594
1595	uint32_t uClientID;
1596	int rc = VbglR3DnDConnect(&uClientID);
1597	if (RT_FAILURE(rc))
1598	return rc;
1599
1600	/** @todo At the moment we only have one DnD proxy window. */
1601	Assert(pCtx->lstWnd.size() == 1);
1602	VBoxDnDWnd *pWnd = pCtx->lstWnd.first();
1603	AssertPtr(pWnd);
1604
1605	/* Number of invalid messages skipped in a row. */
1606	int cMsgSkippedInvalid = 0;
1607
1608	do
1609	{
1610	PVBOXDNDEVENT pEvent = (PVBOXDNDEVENT)RTMemAlloc(sizeof(VBOXDNDEVENT));
1611	if (!pEvent)
1612	{
1613	rc = VERR_NO_MEMORY;
1614	break;
1615	}
1616	/* Note: pEvent will be free'd by the consumer later. */
1617
1618	rc = VbglR3DnDProcessNextMessage(uClientID, &pEvent->Event);
1619	LogFlowFunc(("VbglR3DnDProcessNextMessage returned uType=%RU32, rc=%Rrc\n",
1620	pEvent->Event.uType, rc));
1621
1622	if (ASMAtomicReadBool(&pCtx->fShutdown))
1623	break;
1624
1625	if (RT_SUCCESS(rc))
1626	{
1627	cMsgSkippedInvalid = 0; /* Reset skipped messages count. */
1628
1629	LogFlowFunc(("Received new event, type=%RU32\n", pEvent->Event.uType));
1630
1631	int rc2 = pWnd->ProcessEvent(pEvent);
1632	if (RT_FAILURE(rc2))
1633	LogFlowFunc(("Processing event failed with rc=%Rrc\n", rc2));
1634	}
1635	else if (rc == VERR_CANCELLED)
1636	{
1637	int rc2 = pWnd->OnHgCancel();
1638	if (RT_FAILURE(rc2))
1639	LogFlowFunc(("Cancelling failed with rc=%Rrc\n", rc2));
1640	break;
1641	}
1642	else
1643	{
1644	LogFlowFunc(("Processing next message failed with rc=%Rrc\n", rc));
1645
1646	/* Old(er) hosts either are broken regarding DnD support or otherwise
1647	* don't support the stuff we do on the guest side, so make sure we
1648	* don't process invalid messages forever. */
1649	if (cMsgSkippedInvalid++ > 3)
1650	{
1651	LogRel(("DnD: Too many invalid/skipped messages from host, exiting ...\n"));
1652	break;
1653	}
1654
1655	int rc2 = VbglR3DnDGHSendError(uClientID, rc);
1656	AssertRC(rc2);
1657	}
1658
1659	if (ASMAtomicReadBool(&pCtx->fShutdown))
1660	break;
1661
1662	if (RT_FAILURE(rc)) /* Don't hog the CPU on errors. */
1663	RTThreadSleep(1000 /* ms */);
1664
1665	} while (true);
1666
1667	LogFlowFunc(("Shutting down ...\n"));
1668
1669	VbglR3DnDDisconnect(uClientID);
1670
1671	LogFlowFuncLeaveRC(rc);
1672	return rc;
1673	}
1674

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxDnD.cpp@ 51924

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