draganddrop.cpp@ 42261

Last change on this file since 42261 was 42261, checked in by vboxsync, 12 years ago
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1	/** @file
2	* X11 guest client - Drag and Drop.
3	*/
4
5	/*
6	* Copyright (C) 2011-2012 Oracle Corporation
7	*
8	* This file is part of VirtualBox Open Source Edition (OSE), as
9	* available from http://www.virtualbox.org. This file is free software;
10	* you can redistribute it and/or modify it under the terms of the GNU
11	* General Public License (GPL) as published by the Free Software
12	* Foundation, in version 2 as it comes in the "COPYING" file of the
13	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
14	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
15	*/
16
17	#include <X11/Xlib.h>
18	#include <X11/Xatom.h>
19	#include <X11/extensions/XTest.h>
20
21	#include <iprt/thread.h>
22	#include <iprt/asm.h>
23	#include <iprt/time.h>
24
25	#include <iprt/cpp/mtlist.h>
26	#include <iprt/cpp/ministring.h>
27
28	#include <limits.h>
29
30	#include <VBox/log.h>
31	#include <VBox/VBoxGuestLib.h>
32
33	#include "VBox/HostServices/DragAndDropSvc.h"
34
35	#include "VBoxClient.h"
36
37	/* For X11 guest xDnD is used. See http://www.acc.umu.se/~vatten/XDND.html for
38	* a walk trough.
39	*
40	* H->G:
41	* For X11 this means mainly forwarding all the events from HGCM to the
42	* appropriate X11 events. There exists a proxy window, which is invisible and
43	* used for all the X11 communication. On a HGCM Enter event, we set our proxy
44	* window as XdndSelection owner with the given mime-types. On every HGCM move
45	* event, we move the X11 mouse cursor to the new position and query for the
46	* window below that position. Depending on if it is XdndAware, a new window or
47	* a known window, we send the appropriate X11 messages to it. On HGCM drop, we
48	* send a XdndDrop message to the current window and wait for a X11
49	* SelectionMessage from the target window. Because we didn't have the data in
50	* the requested mime-type, yet, we save that message and ask the host for the
51	* data. When the data is successfully received from the host, we put the data
52	* as a property to the window and send a X11 SelectionNotify event to the
53	* target window.
54	*
55	* G->H:
56	* This is a lot more trickery than H->G. When a pending event from HGCM
57	* arrives, we asks if there is currently an owner of the XdndSelection
58	* property. If so, our proxy window is shown (1x1, but without backing store)
59	* and some mouse event is triggered. This should be followed by an XdndEnter
60	* event send to the proxy window. From this event we can fetch the necessary
61	* info of the mime-types and allowed actions and send this back to the host.
62	* On a drop request from the host, we query for the selection and should get
63	* the data in the specified mime-type. This data is send back to the host.
64	* After that we send a XdndLeave event to the source window.
65	* Todo:
66	* - this isn't finished, yet. Currently the mouse isn't correctly released
67	* in the guest (both, when the drop was successfully or canceled).
68	* - cancel (e.g. with the ESC key) doesn't work
69	*
70	* Todo:
71	* - XdndProxy window support
72	* - INCR support
73	* - make this much more robust for crashes of the other party
74	* - really check for the Xdnd version and the supported features
75	*/
76
77	#define VERBOSE 1
78
79	#if defined(VERBOSE) && defined(DEBUG_poetzsch)
80	# include <iprt/stream.h>
81	# define DO(s) RTPrintf s
82	#else
83	# define DO(s) do {} while(0)
84	//# define DO(s) Log s
85	#endif
86
87	#define VBOX_XDND_VERSION (4)
88	#define VBOX_MAX_XPROPERTIES (LONG_MAX-1)
89
90	/* Shared struct used for adding new X11 events and HGCM messages to a single
91	* event queue. */
92	struct DnDEvent
93	{
94	enum DnDEventType
95	{
96	HGCM_Type = 1,
97	X11_Type
98	};
99	DnDEventType type;
100	union
101	{
102	VBGLR3DNDHGCMEVENT hgcm;
103	XEvent x11;
104	};
105	};
106
107	enum XA_Type
108	{
109	/* States */
110	XA_WM_STATE = 0,
111	/* Properties */
112	XA_TARGETS,
113	XA_MULTIPLE,
114	XA_INCR,
115	/* Mime Types */
116	XA_image_bmp,
117	XA_image_jpg,
118	XA_image_tiff,
119	XA_image_png,
120	XA_text_uri_list,
121	XA_text_uri,
122	XA_text_plain,
123	XA_TEXT,
124	/* xDnD */
125	XA_XdndSelection,
126	XA_XdndAware,
127	XA_XdndEnter,
128	XA_XdndLeave,
129	XA_XdndTypeList,
130	XA_XdndActionList,
131	XA_XdndPosition,
132	XA_XdndActionCopy,
133	XA_XdndActionMove,
134	XA_XdndActionLink,
135	XA_XdndStatus,
136	XA_XdndDrop,
137	XA_XdndFinished,
138	/* Our own stop marker */
139	XA_dndstop,
140	/* End marker */
141	XA_End
142	};
143
144	class DragAndDropService;
145
146	/*******************************************************************************
147	*
148	* xHelpers Declaration
149	*
150	******************************************************************************/
151
152	class xHelpers
153	{
154	public:
155
156	static xHelpers instance(Display pDisplay = 0)
157	{
158	if (!m_pInstance)
159	{
160	AssertPtrReturn(pDisplay, 0);
161	m_pInstance = new xHelpers(pDisplay);
162	}
163	return m_pInstance;
164	}
165
166	inline Display *display() const { return m_pDisplay; }
167	inline Atom xAtom(XA_Type e) const { return m_xAtoms[e]; }
168
169	inline Atom stringToxAtom(const char *pcszString) const
170	{
171	return XInternAtom(m_pDisplay, pcszString, False);
172	}
173	inline RTCString xAtomToString(Atom atom) const
174	{
175	if (atom == None) return "None";
176
177	char* pcsAtom = XGetAtomName(m_pDisplay, atom);
178	RTCString strAtom(pcsAtom);
179	XFree(pcsAtom);
180
181	return strAtom;
182	}
183
184	inline RTCString xAtomListToString(const RTCList<Atom> &formatList)
185	{
186	RTCString format;
187	for (size_t i = 0; i < formatList.size(); ++i)
188	format += xAtomToString(formatList.at(i)) + "\r\n";
189	return format;
190	}
191
192	RTCString xErrorToString(int xrc) const;
193	Window applicationWindowBelowCursor(Window parentWin) const;
194
195	private:
196	xHelpers(Display *pDisplay)
197	: m_pDisplay(pDisplay)
198	{
199	/* Not all x11 atoms we use are defined in the headers. Create the
200	* additional one we need here. */
201	for (int i = 0; i < XA_End; ++i)
202	m_xAtoms[i] = XInternAtom(m_pDisplay, m_xAtomNames[i], False);
203	};
204
205	/* Private member vars */
206	static xHelpers *m_pInstance;
207	Display *m_pDisplay;
208	Atom m_xAtoms[XA_End];
209	static const char *m_xAtomNames[XA_End];
210	};
211
212	/* Some xHelpers convenience defines. */
213	#define gX11 xHelpers::instance()
214	#define xAtom(xa) gX11->xAtom((xa))
215	#define xAtomToString(xa) gX11->xAtomToString((xa))
216
217	/*******************************************************************************
218	*
219	* xHelpers Implementation
220	*
221	******************************************************************************/
222
223	xHelpers *xHelpers::m_pInstance = 0;
224	/* Has to be in sync with the XA_Type enum. */
225	const char *xHelpers::m_xAtomNames[] =
226	{
227	/* States */
228	"WM_STATE",
229	/* Properties */
230	"TARGETS",
231	"MULTIPLE",
232	"INCR",
233	/* Mime Types */
234	"image/bmp",
235	"image/jpg",
236	"image/tiff",
237	"image/png",
238	"text/uri-list",
239	"text/uri",
240	"text/plain",
241	"TEXT",
242	/* xDnD */
243	"XdndSelection",
244	"XdndAware",
245	"XdndEnter",
246	"XdndLeave",
247	"XdndTypeList",
248	"XdndActionList",
249	"XdndPosition",
250	"XdndActionCopy",
251	"XdndActionMove",
252	"XdndActionLink",
253	"XdndStatus",
254	"XdndDrop",
255	"XdndFinished",
256	/* Our own stop marker */
257	"dndstop"
258	};
259
260	RTCString xHelpers::xErrorToString(int xrc) const
261	{
262	switch (xrc)
263	{
264	case Success: return RTCStringFmt("%d (Success)", xrc); break;
265	case BadRequest: return RTCStringFmt("%d (BadRequest)", xrc); break;
266	case BadValue: return RTCStringFmt("%d (BadValue)", xrc); break;
267	case BadWindow: return RTCStringFmt("%d (BadWindow)", xrc); break;
268	case BadPixmap: return RTCStringFmt("%d (BadPixmap)", xrc); break;
269	case BadAtom: return RTCStringFmt("%d (BadAtom)", xrc); break;
270	case BadCursor: return RTCStringFmt("%d (BadCursor)", xrc); break;
271	case BadFont: return RTCStringFmt("%d (BadFont)", xrc); break;
272	case BadMatch: return RTCStringFmt("%d (BadMatch)", xrc); break;
273	case BadDrawable: return RTCStringFmt("%d (BadDrawable)", xrc); break;
274	case BadAccess: return RTCStringFmt("%d (BadAccess)", xrc); break;
275	case BadAlloc: return RTCStringFmt("%d (BadAlloc)", xrc); break;
276	case BadColor: return RTCStringFmt("%d (BadColor)", xrc); break;
277	case BadGC: return RTCStringFmt("%d (BadGC)", xrc); break;
278	case BadIDChoice: return RTCStringFmt("%d (BadIDChoice)", xrc); break;
279	case BadName: return RTCStringFmt("%d (BadName)", xrc); break;
280	case BadLength: return RTCStringFmt("%d (BadLength)", xrc); break;
281	case BadImplementation: return RTCStringFmt("%d (BadImplementation)", xrc); break;
282	}
283	return RTCStringFmt("%d (unknown)", xrc);
284	}
285
286	/* Todo: make this iterative */
287	Window xHelpers::applicationWindowBelowCursor(Window parentWin) const
288	{
289	/* No parent, nothing to do. */
290	if(parentWin == 0)
291	return 0;
292
293	Window appWin = 0;
294	int cProps = -1;
295	/* Fetch all x11 window properties of the parent window. */
296	Atom *pProps = XListProperties(m_pDisplay, parentWin, &cProps);
297	if (cProps > 0)
298	{
299	/* We check the window for the WM_STATE property. */
300	for(int i = 0; i < cProps; ++i)
301	if(pProps[i] == xAtom(XA_WM_STATE))
302	{
303	/* Found it. */
304	appWin = parentWin;
305	break;
306	}
307	/* Cleanup */
308	XFree(pProps);
309	}
310
311	if (!appWin)
312	{
313	Window childWin, wtmp;
314	int tmp;
315	unsigned int utmp;
316	/* Query the next child window of the parent window at the current
317	* mouse position. */
318	XQueryPointer(m_pDisplay, parentWin, &wtmp, &childWin, &tmp, &tmp, &tmp, &tmp, &utmp);
319	/* Recursive call our self to dive into the child tree. */
320	appWin = applicationWindowBelowCursor(childWin);
321	}
322
323	return appWin;
324	}
325
326	/*******************************************************************************
327	*
328	* DragInstance Declaration
329	*
330	******************************************************************************/
331
332	/* For now only one DragInstance will exits when the app is running. In the
333	* future the support for having more than one D&D operation supported at the
334	* time will be necessary. */
335	class DragInstance
336	{
337	public:
338	enum State
339	{
340	Uninitialized,
341	Initialized,
342	Dragging,
343	Dropped
344	};
345
346	enum Mode
347	{
348	Unknown,
349	HG,
350	GH
351	};
352
353	DragInstance(Display pDisplay, DragAndDropService pParent);
354	int init(uint32_t u32ScreenId);
355	void uninit();
356	void reset();
357
358	/* H->G */
359	int hgEnter(const RTCList<RTCString> &formats, uint32_t actions);
360	int hgMove(uint32_t u32xPos, uint32_t u32yPos, uint32_t action);
361	int hgX11ClientMessage(const XEvent& e);
362	int hgDrop();
363	int hgX11SelectionRequest(const XEvent& e);
364	int hgDataReceived(void *pvData, uint32_t cData);
365
366	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
367	/* G->H */
368	int ghIsDnDPending();
369	int ghDropped(const RTCString &strFormat, uint32_t action);
370	#endif
371
372	/* X11 helpers */
373	int moveCursor(uint32_t u32xPos, uint32_t u32yPos);
374	void sendButtonEvent(Window w, int rx, int ry, int button, bool fPress) const;
375	void showProxyWin(int &rx, int &ry) const;
376	void hideProxyWin() const;
377	void registerForEvents(Window w) const;
378
379	void setActionsWindowProperty(Window win, const RTCList<Atom> &actionList) const;
380	void clearActionsWindowProperty(Window win) const;
381	void setFormatsWindowProperty(Window win, Atom property) const;
382	void clearFormatsWindowProperty(Window win) const;
383
384	RTCList<Atom> toAtomList(const RTCList<RTCString> &formatList) const;
385	RTCList<Atom> toAtomList(void *pvData, uint32_t cData) const;
386	static Atom toX11Action(uint32_t uAction);
387	static RTCList<Atom> toX11Actions(uint32_t uActions);
388	static uint32_t toHGCMAction(Atom atom);
389	static uint32_t toHGCMActions(const RTCList<Atom> &actionsList);
390
391	/* Member vars */
392	DragAndDropService *m_pParent;
393	Display *m_pDisplay;
394	int m_screenId;
395	Screen *m_pScreen;
396	Window m_rootWin;
397	Window m_proxyWin;
398	Window m_curWin;
399	long m_curVer;
400	RTCList<Atom> m_formats;
401	RTCList<Atom> m_actions;
402
403	XEvent m_selEvent;
404
405	Mode m_mode;
406	State m_state;
407
408	static const RTCList<RTCString> m_sstrStringMimeTypes;
409	};
410
411	/*******************************************************************************
412	*
413	* DragAndDropService Declaration
414	*
415	******************************************************************************/
416
417	class DragAndDropService : public VBoxClient::Service
418	{
419	public:
420	DragAndDropService()
421	: m_pDisplay(0)
422	, m_hHGCMThread(NIL_RTTHREAD)
423	, m_hX11Thread(NIL_RTTHREAD)
424	, m_hEventSem(NIL_RTSEMEVENT)
425	, m_pCurDnD(0)
426	, m_fSrvStopping(false)
427	{}
428
429	virtual const char *getPidFilePath() { return ".vboxclient-draganddrop.pid"; }
430
431	/** @todo Move this part in VbglR3 and just provide a callback for the platform-specific
432	notification stuff, since this is very similar to the VBoxTray code. */
433	virtual int run(bool fDaemonised = false);
434
435	virtual void cleanup()
436	{
437	/* Cleanup */
438	x11DragAndDropTerm();
439	VbglR3DnDTerm();
440	};
441
442	private:
443	int x11DragAndDropInit();
444	int x11DragAndDropTerm();
445	static int hgcmEventThread(RTTHREAD hThread, void *pvUser);
446	static int x11EventThread(RTTHREAD hThread, void *pvUser);
447
448	bool waitForXMsg(XEvent &ecm, int type, uint32_t uiMaxMS = 100);
449	void clearEventQueue();
450	/* Usually XCheckMaskEvent could be used for queering selected x11 events.
451	* Unfortunately this doesn't work exactly with the events we need. So we
452	* use this predicate method below and XCheckIfEvent. */
453	static Bool isDnDRespondEvent(Display * /* pDisplay /, XEvent pEvent, char *pUser)
454	{
455	if (!pEvent)
456	return False;
457	if ( pEvent->type == SelectionClear
458	\|\| pEvent->type == ClientMessage
459	\|\| pEvent->type == MotionNotify
460	\|\| pEvent->type == SelectionRequest)
461	// \|\| ( pEvent->type == ClientMessage
462	// && reinterpret_cast<XClientMessageEvent*>(pEvent)->window == reinterpret_cast<Window>(pUser))
463	// \|\| ( pEvent->type == SelectionRequest
464	// && reinterpret_cast<XSelectionRequestEvent*>(pEvent)->requestor == reinterpret_cast<Window>(pUser)))
465	return True;
466	return False;
467	}
468
469	/* Private member vars */
470	Display *m_pDisplay;
471
472	RTCMTList<DnDEvent> m_eventQueue;
473	RTTHREAD m_hHGCMThread;
474	RTTHREAD m_hX11Thread;
475	RTSEMEVENT m_hEventSem;
476	DragInstance *m_pCurDnD;
477	bool m_fSrvStopping;
478
479	friend class DragInstance;
480	};
481
482	/*******************************************************************************
483	*
484	* DragInstanc Implementation
485	*
486	******************************************************************************/
487
488	DragInstance::DragInstance(Display pDisplay, DragAndDropService pParent)
489	: m_pParent(pParent)
490	, m_pDisplay(pDisplay)
491	, m_pScreen(0)
492	, m_rootWin(0)
493	, m_proxyWin(0)
494	, m_curWin(0)
495	, m_curVer(-1)
496	, m_mode(Unknown)
497	, m_state(Uninitialized)
498	{
499	uninit();
500	}
501
502	void DragInstance::uninit()
503	{
504	reset();
505	if (m_proxyWin != 0)
506	XDestroyWindow(m_pDisplay, m_proxyWin);
507	m_state = Uninitialized;
508	m_screenId = -1;
509	m_pScreen = 0;
510	m_rootWin = 0;
511	m_proxyWin = 0;
512	}
513
514	void DragInstance::reset()
515	{
516	/* Hide the proxy win. */
517	hideProxyWin();
518	/* If we are currently the Xdnd selection owner, clear that. */
519	Window w = XGetSelectionOwner(m_pDisplay, xAtom(XA_XdndSelection));
520	if (w == m_proxyWin)
521	XSetSelectionOwner(m_pDisplay, xAtom(XA_XdndSelection), None, CurrentTime);
522	/* Clear any other DnD specific data on the proxy win. */
523	clearFormatsWindowProperty(m_proxyWin);
524	clearActionsWindowProperty(m_proxyWin);
525	/* Reset the internal state. */
526	m_formats.clear();
527	m_curWin = 0;
528	m_curVer = -1;
529	m_state = Initialized;
530	}
531
532	const RTCList<RTCString> DragInstance::m_sstrStringMimeTypes = RTCList<RTCString>()
533	/* Uri's */
534	<< "text/uri-list"
535	/* Text */
536	<< "text/plain;charset=utf-8"
537	<< "UTF8_STRING"
538	<< "text/plain"
539	<< "COMPOUND_TEXT"
540	<< "TEXT"
541	<< "STRING"
542	/* OpenOffice formates */
543	<< "application/x-openoffice-embed-source-xml;windows_formatname=\"Star Embed Source (XML)\""
544	<< "application/x-openoffice-drawing;windows_formatname=\"Drawing Format\"";
545
546	int DragInstance::init(uint32_t u32ScreenId)
547	{
548	int rc = VINF_SUCCESS;
549	do
550	{
551	uninit();
552	/* Enough screens configured in the x11 server? */
553	if ((int)u32ScreenId > ScreenCount(m_pDisplay))
554	{
555	rc = VERR_GENERAL_FAILURE;
556	break;
557	}
558	/* Get the screen number from the x11 server. */
559	// pDrag->screen = ScreenOfDisplay(m_pDisplay, u32ScreenId);
560	// if (!pDrag->screen)
561	// {
562	// rc = VERR_GENERAL_FAILURE;
563	// break;
564	// }
565	m_screenId = u32ScreenId;
566	/* Now query the corresponding root window of this screen. */
567	m_rootWin = RootWindow(m_pDisplay, m_screenId);
568	if (!m_rootWin)
569	{
570	rc = VERR_GENERAL_FAILURE;
571	break;
572	}
573	/* Create an invisible window which will act as proxy for the DnD
574	* operation. This window will be used for both the GH and HG
575	* direction. */
576	XSetWindowAttributes attr;
577	RT_ZERO(attr);
578	attr.do_not_propagate_mask = 0;
579	attr.override_redirect = True;
580	// attr.background_pixel = WhitePixel(m_pDisplay, m_screenId);
581	m_proxyWin = XCreateWindow(m_pDisplay, m_rootWin, 0, 0, 1, 1, 0,
582	CopyFromParent, InputOnly, CopyFromParent,
583	CWOverrideRedirect \| CWDontPropagate,
584	&attr);
585
586	// m_proxyWin = XCreateSimpleWindow(m_pDisplay, m_rootWin, 0, 0, 50, 50, 0, WhitePixel(m_pDisplay, m_screenId), WhitePixel(m_pDisplay, m_screenId));
587
588	if (!m_proxyWin)
589	{
590	rc = VERR_GENERAL_FAILURE;
591	break;
592	}
593	/* Make the new window Xdnd aware. */
594	Atom ver = VBOX_XDND_VERSION;
595	XChangeProperty(m_pDisplay, m_proxyWin, xAtom(XA_XdndAware), XA_ATOM, 32, PropModeReplace,
596	reinterpret_cast<unsigned char*>(&ver), 1);
597	}while(0);
598
599	m_state = Initialized;
600
601	return rc;
602	}
603
604	/*
605	* Host -> Guest
606	*/
607
608	int DragInstance::hgEnter(const RTCList<RTCString> &formats, uint32_t actions)
609	{
610	int rc = VINF_SUCCESS;
611
612	reset();
613	DO(("DnD_ENTR: formats=%u: ", formats.size()));
614	#if defined(VERBOSE) && defined(DEBUG_poetzsch)
615	for (size_t i = 0; i < formats.size(); ++i)
616	DO(("'%s' ", formats.at(i).c_str()));
617	#endif /* DEBUG */
618	DO(("\n"));
619
620	m_formats = toAtomList(formats);
621
622	/* If we have more than 3 formats we have to use the type list extension. */
623	if (m_formats.size() > 3)
624	setFormatsWindowProperty(m_proxyWin, xAtom(XA_XdndTypeList));
625
626	/* Announce the possible actions */
627	setActionsWindowProperty(m_proxyWin, toX11Actions(actions));
628
629	/* Set the DnD selection owner to our window. */
630	XSetSelectionOwner(m_pDisplay, xAtom(XA_XdndSelection), m_proxyWin, CurrentTime);
631
632	m_mode = HG;
633	m_state = Dragging;
634
635	return rc;
636	}
637
638	int DragInstance::hgMove(uint32_t u32xPos, uint32_t u32yPos, uint32_t action)
639	{
640	DO(("DnD_MOVE: "));
641
642	if ( m_mode != HG
643	\|\| m_state != Dragging)
644	return VERR_INVALID_STATE;
645
646	int rc = VINF_SUCCESS;
647	int xrc = Success;
648
649	/* Move the mouse cursor within the guest. */
650	moveCursor(u32xPos, u32yPos);
651
652	Window newWin = None; /* Default to _no_ window below the cursor. */
653	long newVer = -1; /* This means the current window is _not_ XdndAware. */
654
655	/* Search for the application window below the cursor. */
656	newWin = gX11->applicationWindowBelowCursor(m_rootWin);
657	if (newWin != None)
658	{
659	/* Temp stuff for the XGetWindowProperty call. */
660	Atom atmp;
661	int fmt;
662	unsigned long cItems, cbRemaining;
663	unsigned char *pcData = NULL;
664	/* Query the XdndAware property from the window. We are interested in
665	* the version and if it is XdndAware at all. */
666	xrc = XGetWindowProperty(m_pDisplay, newWin, xAtom(XA_XdndAware), 0, 2, False, AnyPropertyType, &atmp, &fmt, &cItems, &cbRemaining, &pcData);
667	if (RT_UNLIKELY(xrc != Success))
668	DO(("DnD_MOVE: error in getting the window property (%s)\n", gX11->xErrorToString(xrc).c_str()));
669	else
670	{
671	if (RT_UNLIKELY(pcData == NULL \|\| fmt != 32 \|\| cItems != 1))
672	DO(("Prop=error[data=%#x,fmt=%u,items=%u] ", pcData, fmt, cItems));
673	else
674	{
675	newVer = reinterpret_cast<long*>(pcData)[0];
676	DO(("XdndAware=%u ", newVer));
677	}
678	XFree(pcData);
679	}
680	}
681
682	if (newWin != m_curWin && m_curVer != -1)
683	{
684	DO(("leave=%#x ", m_curWin));
685
686	/* We left the current XdndAware window. Announce this to the window. */
687
688	XClientMessageEvent m;
689	RT_ZERO(m);
690	m.type = ClientMessage;
691	m.display = m_pDisplay;
692	m.window = m_curWin;
693	m.message_type = xAtom(XA_XdndLeave);
694	m.format = 32;
695	m.data.l[0] = m_proxyWin;
696
697	xrc = XSendEvent(m_pDisplay, m_curWin, False, NoEventMask, reinterpret_cast<XEvent*>(&m));
698	if (RT_UNLIKELY(xrc == 0))
699	DO(("DnD_MOVE: error sending xevent\n"));
700	}
701
702	if (newWin != m_curWin && newVer != -1)
703	{
704	DO(("enter=%#x ", newWin));
705
706	/* We enter a new window. Announce the XdndEnter event to the new
707	* window. The first three mime types are attached to the event (the
708	* others could be requested by the XdndTypeList property from the
709	* window itself). */
710
711	XClientMessageEvent m;
712	RT_ZERO(m);
713	m.type = ClientMessage;
714	m.display = m_pDisplay;
715	m.window = newWin;
716	m.message_type = xAtom(XA_XdndEnter);
717	m.format = 32;
718	m.data.l[0] = m_proxyWin;
719	m.data.l[1] = RT_MAKE_U32_FROM_U8(m_formats.size() > 3 ? 1 : 0, 0, 0, RT_MIN(VBOX_XDND_VERSION, newVer));
720	m.data.l[2] = m_formats.value(0, None);
721	m.data.l[3] = m_formats.value(1, None);
722	m.data.l[4] = m_formats.value(2, None);
723
724	xrc = XSendEvent(m_pDisplay, newWin, False, NoEventMask, reinterpret_cast<XEvent*>(&m));
725	if (RT_UNLIKELY(xrc == 0))
726	DO(("DnD_MOVE: error sending xevent\n"));
727	}
728
729	if (newVer != -1)
730	{
731	DO(("move=%#x pos=%ux%u ", newWin, u32xPos, u32yPos));
732
733	/* Send a XdndPosition event with the proposed action to the guest. */
734
735	Atom pa = toX11Action(action);
736	DO(("action='%s' ", xAtomToString(pa).c_str()));
737
738	XClientMessageEvent m;
739	RT_ZERO(m);
740	m.type = ClientMessage;
741	m.display = m_pDisplay;
742	m.window = newWin;
743	m.message_type = xAtom(XA_XdndPosition);
744	m.format = 32;
745	m.data.l[0] = m_proxyWin;
746	m.data.l[2] = RT_MAKE_U32(u32yPos, u32xPos);
747	m.data.l[3] = CurrentTime;
748	m.data.l[4] = pa;
749
750	xrc = XSendEvent(m_pDisplay, newWin, False, NoEventMask, reinterpret_cast<XEvent*>(&m));
751	if (RT_UNLIKELY(xrc == 0))
752	DO(("DnD_MOVE: error sending xevent\n"));
753	}
754	if (newWin == None && newVer == -1)
755	/* No window to process, so send a ignore ack event to the host. */
756	rc = VbglR3DnDHGAcknowledgeOperation(DND_IGNORE_ACTION);
757
758	m_curWin = newWin;
759	m_curVer = RT_MIN(VBOX_XDND_VERSION, newVer);
760
761	DO(("\n"));
762
763	return rc;
764	}
765
766	int DragInstance::hgX11ClientMessage(const XEvent& e)
767	{
768	if ( m_mode != HG)
769	// \|\| m_state != Dragging)
770	return VERR_INVALID_STATE;
771
772	/* Client messages are used to inform us about the status of a XdndAware
773	* window, in response of some events we send to them. */
774	int rc = VINF_SUCCESS;
775	if ( e.xclient.message_type == xAtom(XA_XdndStatus)
776	&& m_curWin == static_cast<Window>(e.xclient.data.l[0]))
777	{
778	/* The XdndStatus message tell us if the window will accept the DnD
779	* event and with which action. We immediately send this info down to
780	* the host as a response of a previous DnD message. */
781	DO(("DnD_STAT: win=%#x,accept=%RTbool,action='%s'\n",
782	e.xclient.data.l[0],
783	ASMBitTest(&e.xclient.data.l[1], 0),
784	xAtomToString(e.xclient.data.l[4]).c_str()));
785	uint32_t uAction = DND_IGNORE_ACTION;
786	/* Todo: compare this with the allowed actions. */
787	if (ASMBitTest(&e.xclient.data.l[1], 0))
788	uAction = toHGCMAction(static_cast<Atom>(e.xclient.data.l[4]));
789	rc = VbglR3DnDHGAcknowledgeOperation(uAction);
790	}
791	else if (e.xclient.message_type == xAtom(XA_XdndFinished))
792	{
793	/* This message is send on a un/successful DnD drop request. */
794	DO(("DnD_FINI: win=%#x,success=%RTbool,action='%s'\n",
795	e.xclient.data.l[0],
796	ASMBitTest(&e.xclient.data.l[1], 0),
797	xAtomToString(e.xclient.data.l[2]).c_str()));
798	reset();
799	}
800	else
801	DO(("DnD_CLI: win=%#x,msg='%s'\n", e.xclient.data.l[0], xAtomToString(e.xclient.message_type).c_str()));
802	return rc;
803	}
804
805	int DragInstance::hgDrop()
806	{
807	DO(("DnD_DROP: win=%#x\n", m_curWin));
808
809	if ( m_mode != HG
810	\|\| m_state != Dragging)
811	return VERR_INVALID_STATE;
812
813	int rc = VINF_SUCCESS;
814
815	/* Send a drop event to the current window and reset our DnD status. */
816	XClientMessageEvent m;
817	RT_ZERO(m);
818	m.type = ClientMessage;
819	m.display = m_pDisplay;
820	m.window = m_curWin;
821	m.message_type = xAtom(XA_XdndDrop);
822	m.format = 32;
823	m.data.l[0] = m_proxyWin;
824	m.data.l[2] = CurrentTime;
825
826	int xrc = XSendEvent(m_pDisplay, m_curWin, False, NoEventMask, reinterpret_cast<XEvent*>(&m));
827	if (RT_UNLIKELY(xrc == 0))
828	DO(("DnD_DROP: error sending xevent\n"));
829
830	m_curWin = None;
831	m_curVer = -1;
832
833	m_state = Dropped;
834
835	return rc;
836	}
837
838	int DragInstance::hgX11SelectionRequest(const XEvent& e)
839	{
840	AssertReturn(e.type == SelectionRequest, VERR_INVALID_PARAMETER);
841
842	if ( m_mode != HG)
843	// \|\| m_state != D)
844	return VERR_INVALID_STATE;
845
846	DO(("DnD_SELR: owner=%#x,requestor=%#x,sel_atom='%s',tar_atom='%s',prop_atom='%s',time=%u\n",
847	e.xselectionrequest.owner,
848	e.xselectionrequest.requestor,
849	xAtomToString(e.xselectionrequest.selection).c_str(),
850	xAtomToString(e.xselectionrequest.target).c_str(),
851	xAtomToString(e.xselectionrequest.property).c_str(),
852	e.xselectionrequest.time));
853
854	int rc = VINF_SUCCESS;
855
856	/* A window is asking for some data. Normally here the data would be copied
857	* into the selection buffer and send to the requestor. Obviously we can't
858	* do that, cause we first need to ask the host for the data of the
859	* requested mime type. This is done and later answered with the correct
860	* data (s. dataReceived). */
861
862	/* Is the requestor asking for the possible mime types? */
863	if(e.xselectionrequest.target == xAtom(XA_TARGETS))
864	{
865	DO(("DnD_SELR: ask for target list\n"));
866	/* If so, set the window property with the formats on the requestor
867	* window. */
868	setFormatsWindowProperty(e.xselectionrequest.requestor, e.xselectionrequest.property);
869	XEvent s;
870	RT_ZERO(s);
871	s.xselection.type = SelectionNotify;
872	s.xselection.display = e.xselection.display;
873	s.xselection.time = e.xselectionrequest.time;
874	s.xselection.selection = e.xselectionrequest.selection;
875	s.xselection.requestor = e.xselectionrequest.requestor;
876	s.xselection.target = e.xselectionrequest.target;
877	s.xselection.property = e.xselectionrequest.property;
878	int xrc = XSendEvent(e.xselection.display, e.xselectionrequest.requestor, False, 0, &s);
879	if (RT_UNLIKELY(xrc == 0))
880	DO(("DnD_SELR: error sending xevent\n"));
881	}
882	/* Is the requestor asking for a specific mime type (we support)? */
883	else if(m_formats.contains(e.xselectionrequest.target))
884	{
885	DO(("DnD_SELR: ask for data (format='%s')\n", xAtomToString(e.xselectionrequest.target).c_str()));
886	/* If so, we need to inform the host about this request. Save the
887	* selection request event for later use. */
888	if ( m_state != Dropped)
889	// \|\| m_curWin != e.xselectionrequest.requestor)
890	{
891	DO(("DnD_SELR: refuse\n"));
892	XEvent s;
893	RT_ZERO(s);
894	s.xselection.type = SelectionNotify;
895	s.xselection.display = e.xselection.display;
896	s.xselection.time = e.xselectionrequest.time;
897	s.xselection.selection = e.xselectionrequest.selection;
898	s.xselection.requestor = e.xselectionrequest.requestor;
899	s.xselection.target = None;
900	s.xselection.property = e.xselectionrequest.property;
901	int xrc = XSendEvent(e.xselection.display, e.xselectionrequest.requestor, False, 0, &s);
902	if (RT_UNLIKELY(xrc == 0))
903	DO(("DnD_SELR: error sending xevent\n"));
904	}
905	else
906	{
907	memcpy(&m_selEvent, &e, sizeof(XEvent));
908	rc = VbglR3DnDHGRequestData(xAtomToString(e.xselectionrequest.target).c_str());
909	}
910	}
911	/* Anything else. */
912	else
913	{
914	DO(("DnD_SELR: refuse\n"));
915	/* We don't understand this request message and therefore answer with an
916	* refusal messages. */
917	XEvent s;
918	RT_ZERO(s);
919	s.xselection.type = SelectionNotify;
920	s.xselection.display = e.xselection.display;
921	s.xselection.time = e.xselectionrequest.time;
922	s.xselection.selection = e.xselectionrequest.selection;
923	s.xselection.requestor = e.xselectionrequest.requestor;
924	s.xselection.target = None; /* default is refusing */
925	s.xselection.property = None; /* default is refusing */
926	int xrc = XSendEvent(e.xselection.display, e.xselectionrequest.requestor, False, 0, &s);
927	if (RT_UNLIKELY(xrc == 0))
928	DO(("DnD_SELR: error sending xevent\n"));
929	}
930
931	return rc;
932	}
933
934	int DragInstance::hgDataReceived(void *pvData, uint32_t cData)
935	{
936	if ( m_mode != HG
937	\|\| m_state != Dropped)
938	return VERR_INVALID_STATE;
939
940	if (RT_UNLIKELY( pvData == NULL
941	\|\| cData == 0))
942	return VERR_INVALID_PARAMETER;
943
944	if (RT_UNLIKELY(m_state != Dropped))
945	return VERR_INVALID_STATE;
946
947	/* Make a copy of the data. The xserver will become the new owner. */
948	void *pvNewData = RTMemAlloc(cData);
949	if (RT_UNLIKELY(!pvNewData))
950	return VERR_NO_MEMORY;
951	memcpy(pvNewData, pvData, cData);
952
953	/* The host send us the DnD data in the requested mime type. This allows us
954	* to fill the XdndSelection property of the requestor window with the data
955	* and afterwards inform him about the new status. */
956	XEvent s;
957	RT_ZERO(s);
958	s.xselection.type = SelectionNotify;
959	s.xselection.display = m_selEvent.xselection.display;
960	// s.xselection.owner = m_selEvent.xselectionrequest.owner;
961	s.xselection.time = m_selEvent.xselectionrequest.time;
962	s.xselection.selection = m_selEvent.xselectionrequest.selection;
963	s.xselection.requestor = m_selEvent.xselectionrequest.requestor;
964	s.xselection.target = m_selEvent.xselectionrequest.target;
965	s.xselection.property = m_selEvent.xselectionrequest.property;
966
967	DO(("DnD_SEND: owner=%#x,requestor=%#x,sel_atom='%s',tar_atom='%s',prop_atom='%s',time=%u\n",
968	m_selEvent.xselectionrequest.owner,
969	s.xselection.requestor,
970	xAtomToString(s.xselection.selection).c_str(),
971	xAtomToString(s.xselection.target).c_str(),
972	xAtomToString(s.xselection.property).c_str(),
973	s.xselection.time));
974
975	/* Fill up the property with the data. */
976	XChangeProperty(s.xselection.display, s.xselection.requestor, s.xselection.property, s.xselection.target, 8, PropModeReplace,
977	reinterpret_cast<const unsigned char*>(pvNewData), cData);
978	int xrc = XSendEvent(s.xselection.display, s.xselection.requestor, True, 0, &s);
979	if (RT_UNLIKELY(xrc == 0))
980	DO(("DnD_SEND: error sending xevent\n"));
981
982	return VINF_SUCCESS;
983	}
984
985
986	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
987	/*
988	* Guest -> Host
989	*/
990
991	int DragInstance::ghIsDnDPending()
992	{
993	int rc = VINF_SUCCESS;
994	Window w = XGetSelectionOwner(m_pDisplay, xAtom(XA_XdndSelection));
995	DO(("Checking pending %X %X\n", w, m_proxyWin));
996	/* Is there someone own the Xdnd selection which aren't we. */
997	if ( w
998	&& w != m_proxyWin)
999	{
1000	/* Map the window on the current cursor position, which should provoke
1001	* an XdndEnter event. */
1002	int rx, ry;
1003	showProxyWin(rx, ry);
1004	XEvent e;
1005	if (m_pParent->waitForXMsg(e, ClientMessage))
1006	{
1007	int xrc = Success;
1008	XClientMessageEvent clme = reinterpret_cast<XClientMessageEvent>(&e);
1009	DO(("next X event %s\n", gX11->xAtomToString(clme->message_type).c_str()));
1010	if (clme->message_type == xAtom(XA_XdndEnter))
1011	{
1012	Atom type = None;
1013	int f;
1014	unsigned long n, a;
1015	unsigned char *ret = 0;
1016	reset();
1017
1018	m_formats.clear();
1019	m_actions.clear();
1020	m_curWin = w;
1021	DO(("XA_XdndEnter\n"));
1022	/* Check if the mime types are in the msg itself or if we need
1023	* to fetch the XdndTypeList property from the window. */
1024	if (!ASMBitTest(&clme->data.l[1], 0))
1025	{
1026	for (int i = 2; i < 5; ++i)
1027	{
1028	DO(("receive list msg: %s\n", gX11->xAtomToString(clme->data.l[i]).c_str()));
1029	m_formats.append(clme->data.l[i]);
1030	}
1031	}
1032	else
1033	{
1034	xrc = XGetWindowProperty(m_pDisplay, w, xAtom(XA_XdndTypeList), 0, VBOX_MAX_XPROPERTIES, False, XA_ATOM, &type, &f, &n, &a, &ret);
1035	if ( xrc == Success
1036	&& n > 0
1037	&& ret)
1038	{
1039	Atom data = reinterpret_cast<Atom>(ret);
1040	for (int i = 0; i < RT_MIN(VBOX_MAX_XPROPERTIES, n); ++i)
1041	{
1042	DO(("receive list: %s\n", gX11->xAtomToString(data[i]).c_str()));
1043	m_formats.append(data[i]);
1044	}
1045	XFree(ret);
1046	}
1047	}
1048	/* Fetch the possible list of actions, if this property is set. */
1049	xrc = XGetWindowProperty(m_pDisplay, w, xAtom(XA_XdndActionList), 0, VBOX_MAX_XPROPERTIES, False, XA_ATOM, &type, &f, &n, &a, &ret);
1050	if ( xrc == Success
1051	&& n > 0
1052	&& ret)
1053	{
1054	Atom data = reinterpret_cast<Atom>(ret);
1055	for (int i = 0; i < RT_MIN(VBOX_MAX_XPROPERTIES, n); ++i)
1056	{
1057	DO(("receive actions: %s\n", gX11->xAtomToString(data[i]).c_str()));
1058	m_actions.append(data[i]);
1059	}
1060	XFree(ret);
1061	}
1062
1063	m_state = Dragging;
1064	m_mode = GH;
1065	/* Acknowledge the event by sending a Status msg back to the
1066	* window. */
1067	XClientMessageEvent m;
1068	RT_ZERO(m);
1069	m.type = ClientMessage;
1070	m.display = m_pDisplay;
1071	m.window = clme->data.l[0];
1072	m.message_type = xAtom(XA_XdndStatus);
1073	m.format = 32;
1074	m.data.l[0] = m_proxyWin;
1075	m.data.l[1] = 1;
1076	m.data.l[4] = xAtom(XA_XdndActionCopy);
1077	xrc = XSendEvent(m_pDisplay, clme->data.l[0], False, 0, reinterpret_cast<XEvent*>(&m));
1078	if (RT_UNLIKELY(xrc == 0))
1079	DO(("DnD_PNDG: error sending xevent\n"));
1080	}
1081	else if (clme->message_type == xAtom(XA_XdndPosition))
1082	{
1083	DO(("XA_XdndPosition\n"));
1084	XClientMessageEvent m;
1085	RT_ZERO(m);
1086	m.type = ClientMessage;
1087	m.display = m_pDisplay;
1088	m.window = clme->data.l[0];
1089	m.message_type = xAtom(XA_XdndStatus);
1090	m.format = 32;
1091	m.data.l[0] = m_proxyWin;
1092	m.data.l[1] = 1;
1093	m.data.l[4] = clme->data.l[4];
1094	xrc = XSendEvent(m_pDisplay, clme->data.l[0], False, 0, reinterpret_cast<XEvent*>(&m));
1095	if (RT_UNLIKELY(xrc == 0))
1096	DO(("DnD_PNDG: error sending xevent\n"));
1097	}
1098	else if (clme->message_type == xAtom(XA_XdndLeave))
1099	{
1100	}
1101	}
1102	hideProxyWin();
1103
1104	rc = VbglR3DnDGHAcknowledgePending(DND_COPY_ACTION, toHGCMActions(m_actions), gX11->xAtomListToString(m_formats).c_str());
1105	}
1106	return rc;
1107	}
1108
1109	int DragInstance::ghDropped(const RTCString &strFormat, uint32_t action)
1110	{
1111	DO(("DND_DRO: format='%s' action=%d\n", strFormat.c_str(), action));
1112	int rc = VINF_SUCCESS;
1113
1114	/* Show the proxy window, so that the source will find it. */
1115	int rx, ry;
1116	showProxyWin(rx, ry);
1117	XFlush(m_pDisplay);
1118	/* We send a fake release event to the current window, cause
1119	* this should have the grab. */
1120	sendButtonEvent(m_curWin, rx, ry, 1, false);
1121	/* The fake button release event, should lead to an XdndDrop event from the
1122	* source. Because of the showing of the proxy window, sometimes other Xdnd
1123	* events occurs before, like a XdndPosition event. We are not interested
1124	* in those, so try to get the right one. */
1125	XEvent e;
1126	XClientMessageEvent *clme = 0;
1127	RT_ZERO(e);
1128	int tries = 3;
1129	do
1130	{
1131	if (m_pParent->waitForXMsg(e, ClientMessage))
1132	{
1133	if (reinterpret_cast<XClientMessageEvent*>(&e)->message_type == xAtom(XA_XdndDrop))
1134	{
1135	clme = reinterpret_cast<XClientMessageEvent*>(&e);
1136	break;
1137	}
1138	}
1139	}while(tries--);
1140	if (clme)
1141	{
1142	/* Make some paranoid checks. */
1143	if (clme->message_type == xAtom(XA_XdndDrop))
1144	{
1145	/* Request to convert the selection in the specific format and
1146	* place it to our proxy window as property. */
1147	Window srcWin = m_curWin;//clme->data.l[0];
1148	Atom aFormat = gX11->stringToxAtom(strFormat.c_str());
1149	XConvertSelection(m_pDisplay, xAtom(XA_XdndSelection), aFormat, xAtom(XA_XdndSelection), m_proxyWin, clme->data.l[2]);
1150	/* Wait for the selection notify event. */
1151	RT_ZERO(e);
1152	if (m_pParent->waitForXMsg(e, SelectionNotify))
1153	{
1154	/* Make some paranoid checks. */
1155	if ( e.xselection.type == SelectionNotify
1156	&& e.xselection.display == m_pDisplay
1157	&& e.xselection.selection == xAtom(XA_XdndSelection)
1158	&& e.xselection.requestor == m_proxyWin
1159	&& e.xselection.target == aFormat)
1160	{
1161	DO(("DND_DRO: selection notfiy (from: %x)\n", m_curWin));
1162	Atom type;
1163	int format;
1164	unsigned long cItems, cbRemaining;
1165	unsigned char *ucData = 0;
1166	XGetWindowProperty(m_pDisplay, m_proxyWin, xAtom(XA_XdndSelection),
1167	0, VBOX_MAX_XPROPERTIES, True, AnyPropertyType,
1168	&type, &format, &cItems, &cbRemaining, &ucData);
1169	DO(("DND_DRO: %s %d %d %s\n", gX11->xAtomToString(type).c_str(), cItems, format, ucData));
1170	if ( type != None
1171	&& ucData != NULL
1172	&& format >= 8
1173	&& cItems > 0
1174	&& cbRemaining == 0)
1175	{
1176	size_t cbData = cItems * (format / 8);
1177	/* For whatever reason some of the string mime-types are not
1178	* zero terminated. Check that and correct it when necessary,
1179	* cause the guest side wants this always. */
1180	if ( m_sstrStringMimeTypes.contains(strFormat)
1181	&& ucData[cbData - 1] != '\0')
1182	{
1183	DO(("rebuild %u\n", cbData));
1184	unsigned char ucData1 = static_cast<unsigned char>(RTMemAlloc(cbData + 1));
1185	if (ucData1)
1186	{
1187	memcpy(ucData1, ucData, cbData);
1188	ucData1[cbData++] = '\0';
1189	/* Got the data and its fully transfered. */
1190	rc = VbglR3DnDGHSendData(ucData1, cbData);
1191	RTMemFree(ucData1);
1192	}
1193	else
1194	rc = VERR_NO_MEMORY;
1195	}
1196	else
1197	/* Just send the data to the host. */
1198	rc = VbglR3DnDGHSendData(ucData, cbData);
1199
1200	DO(("send responce\n"));
1201	/* Confirm the result of the transfer to the source window. */
1202	XClientMessageEvent m;
1203	RT_ZERO(m);
1204	m.type = ClientMessage;
1205	m.display = m_pDisplay;
1206	m.window = srcWin;
1207	m.message_type = xAtom(XA_XdndFinished);
1208	m.format = 32;
1209	m.data.l[0] = m_proxyWin;
1210	m.data.l[1] = RT_SUCCESS(rc) ? 1 : 0; /* Confirm or deny success */
1211	m.data.l[2] = RT_SUCCESS(rc) ? toX11Action(action) : None; /* Action used on success */
1212
1213	int xrc = XSendEvent(m_pDisplay, srcWin, True, NoEventMask, reinterpret_cast<XEvent*>(&m));
1214	if (RT_UNLIKELY(xrc == 0))
1215	DO(("DnD_DRO: error sending xevent\n"));
1216	}
1217	else
1218	{
1219	if (type == xAtom(XA_INCR))
1220	{
1221	/* Todo: */
1222	AssertMsgFailed(("Incrementally transfers are not supported, yet\n"));
1223	rc = VERR_NOT_IMPLEMENTED;
1224	}
1225	else
1226	{
1227	AssertMsgFailed(("Not supported data type\n"));
1228	rc = VERR_INVALID_PARAMETER;
1229	}
1230	/* Cancel this. */
1231	XClientMessageEvent m;
1232	RT_ZERO(m);
1233	m.type = ClientMessage;
1234	m.display = m_pDisplay;
1235	m.window = srcWin;
1236	m.message_type = xAtom(XA_XdndFinished);
1237	m.format = 32;
1238	m.data.l[0] = m_proxyWin;
1239	m.data.l[1] = 0;
1240	m.data.l[2] = None;
1241	int xrc = XSendEvent(m_pDisplay, srcWin, False, NoEventMask, reinterpret_cast<XEvent*>(&m));
1242	if (RT_UNLIKELY(xrc == 0))
1243	DO(("DnD_DRO: error sending xevent\n"));
1244	m_curWin = 0;
1245	}
1246	/* Cleanup */
1247	if (ucData)
1248	XFree(ucData);
1249	}
1250	else
1251	rc = VERR_INVALID_PARAMETER;
1252	}
1253	else
1254	rc = VERR_TIMEOUT;
1255	}
1256	else
1257	rc = VERR_WRONG_ORDER;
1258	}
1259	else
1260	rc = VERR_TIMEOUT;
1261
1262	/* Inform the host on error */
1263	if (RT_FAILURE(rc))
1264	VbglR3DnDGHErrorEvent(rc);
1265
1266	/* At this point, we have either successfully transfered any data or not.
1267	* So reset our internal state, cause we are done. */
1268	reset();
1269
1270	return rc;
1271	}
1272
1273	#endif /* VBOX_WITH_DRAG_AND_DROP_GH */
1274
1275	/*
1276	* Helpers
1277	*/
1278
1279	int DragInstance::moveCursor(uint32_t u32xPos, uint32_t u32yPos)
1280	{
1281	/* Move the guest pointer to the DnD position, so we can find the window
1282	* below that position. */
1283	XWarpPointer(m_pDisplay, None, m_rootWin, 0, 0, 0, 0, u32xPos, u32yPos);
1284	return VINF_SUCCESS;
1285	}
1286
1287	void DragInstance::sendButtonEvent(Window w, int rx, int ry, int button, bool fPress) const
1288	{
1289	// XTestFakeMotionEvent(m_pDisplay, -1, rx, ry, CurrentTime);
1290	// XTestFakeMotionEvent(m_pDisplay, -1, rx + 1, ry + 1, CurrentTime);
1291	// int rc = XTestFakeButtonEvent(m_pDisplay, 1, False, CurrentTime);
1292	// if (rc != 0)
1293	{
1294	XButtonEvent be;
1295	RT_ZERO(be);
1296	be.display = m_pDisplay;
1297	be.root = m_rootWin;
1298	be.window = w;
1299	be.subwindow = None;
1300	be.same_screen = True;
1301	be.time = CurrentTime;
1302	be.button = button;
1303	be.state \|= button == 1 ? Button1MotionMask :
1304	button == 2 ? Button2MotionMask :
1305	button == 3 ? Button3MotionMask :
1306	button == 4 ? Button4MotionMask :
1307	button == 5 ? Button5MotionMask : 0;
1308	be.type = fPress ? ButtonPress : ButtonRelease;
1309	be.x_root = rx;
1310	be.y_root = ry;
1311	XTranslateCoordinates(m_pDisplay, be.root, be.window, be.x_root, be.y_root, &be.x, &be.y, &be.subwindow);
1312	int xrc = XSendEvent(m_pDisplay, be.window, True, ButtonPressMask, reinterpret_cast<XEvent*>(&be));
1313	if (RT_UNLIKELY(xrc == 0))
1314	DO(("DnD_BTN: error sending xevent\n"));
1315	}
1316
1317	}
1318
1319	void DragInstance::showProxyWin(int &rx, int &ry) const
1320	{
1321	int cx, cy;
1322	unsigned int m;
1323	Window r, c;
1324	// XTestGrabControl(m_pDisplay, False);
1325	XQueryPointer(m_pDisplay, m_rootWin, &r, &c, &rx, &ry, &cx, &cy, &m);
1326	XSynchronize(m_pDisplay, True);
1327	XMapWindow(m_pDisplay, m_proxyWin);
1328	XRaiseWindow(m_pDisplay, m_proxyWin);
1329	XMoveResizeWindow(m_pDisplay, m_proxyWin, rx, ry, 1, 1);
1330	XWarpPointer(m_pDisplay, None, m_rootWin, 0, 0, 0, 0, rx , ry);
1331	XSynchronize(m_pDisplay, False);
1332	// XTestGrabControl(m_pDisplay, True);
1333	}
1334
1335	void DragInstance::hideProxyWin() const
1336	{
1337	XUnmapWindow(m_pDisplay, m_proxyWin);
1338	}
1339
1340	/* Currently, not used */
1341	void DragInstance::registerForEvents(Window w) const
1342	{
1343	// if (w == m_proxyWin)
1344	// return;
1345
1346	DO(("%x\n", w));
1347	// XSelectInput(m_pDisplay, w, Button1MotionMask \| Button2MotionMask \| Button3MotionMask \| Button4MotionMask \| Button5MotionMask);//\| SubstructureNotifyMask);
1348	// XSelectInput(m_pDisplay, w, ButtonMotionMask); //PointerMotionMask);
1349	XSelectInput(m_pDisplay, w, PointerMotionMask); //PointerMotionMask);
1350	Window hRealRoot, hParent;
1351	Window *phChildrenRaw = NULL;
1352	unsigned cChildren;
1353	if (XQueryTree(m_pDisplay, w, &hRealRoot, &hParent, &phChildrenRaw, &cChildren))
1354	{
1355	for (unsigned i = 0; i < cChildren; ++i)
1356	registerForEvents(phChildrenRaw[i]);
1357	XFree(phChildrenRaw);
1358	}
1359	}
1360
1361	void DragInstance::setActionsWindowProperty(Window win, const RTCList<Atom> &actionList) const
1362	{
1363	if (actionList.isEmpty())
1364	return;
1365
1366	XChangeProperty(m_pDisplay, win, xAtom(XA_XdndActionList), XA_ATOM, 32, PropModeReplace,
1367	reinterpret_cast<const unsigned char*>(actionList.raw()), actionList.size());
1368	}
1369
1370	void DragInstance::clearActionsWindowProperty(Window win) const
1371	{
1372	XDeleteProperty(m_pDisplay, win, xAtom(XA_XdndActionList));
1373	}
1374
1375	void DragInstance::setFormatsWindowProperty(Window win, Atom property) const
1376	{
1377	if (m_formats.isEmpty())
1378	return;
1379
1380	/* We support TARGETS and the data types. */
1381	RTCList<Atom> targets(m_formats.size() + 1);
1382	targets.append(xAtom(XA_TARGETS));
1383	targets.append(m_formats);
1384
1385	/* Add the property with the property data to the window. */
1386	XChangeProperty(m_pDisplay, win, property, XA_ATOM, 32, PropModeReplace,
1387	reinterpret_cast<const unsigned char*>(targets.raw()), targets.size());
1388	}
1389
1390	void DragInstance::clearFormatsWindowProperty(Window win) const
1391	{
1392	XDeleteProperty(m_pDisplay, win, xAtom(XA_XdndTypeList));
1393	}
1394
1395	RTCList<Atom> DragInstance::toAtomList(const RTCList<RTCString> &formatList) const
1396	{
1397	RTCList<Atom> atomList;
1398	for (size_t i = 0; i < formatList.size(); ++i)
1399	atomList.append(XInternAtom(m_pDisplay, formatList.at(i).c_str(), False));
1400
1401	return atomList;
1402	}
1403
1404	RTCList<Atom> DragInstance::toAtomList(void *pvData, uint32_t cData) const
1405	{
1406	if ( !pvData
1407	\|\| !cData)
1408	return RTCList<Atom>();
1409	char pszStr = (char)pvData;
1410	uint32_t cStr = cData;
1411
1412	RTCList<Atom> atomList;
1413	while (cStr > 0)
1414	{
1415	size_t cSize = RTStrNLen(pszStr, cStr);
1416	/* Create a copy with max N chars, so that we are on the save side,
1417	* even if the data isn't zero terminated. */
1418	char *pszTmp = RTStrDupN(pszStr, cSize);
1419	DO(("f: %s\n", pszTmp));
1420	atomList.append(XInternAtom(m_pDisplay, pszTmp, False));
1421	RTStrFree(pszTmp);
1422	pszStr += cSize + 1;
1423	cStr -= cSize + 1;
1424	}
1425
1426	return atomList;
1427	}
1428
1429	/* static */
1430	Atom DragInstance::toX11Action(uint32_t uAction)
1431	{
1432	/* Ignore is None */
1433	return (isDnDCopyAction(uAction) ? xAtom(XA_XdndActionCopy) :
1434	isDnDMoveAction(uAction) ? xAtom(XA_XdndActionMove) :
1435	isDnDLinkAction(uAction) ? xAtom(XA_XdndActionLink) :
1436	None);
1437	}
1438
1439	/* static */
1440	RTCList<Atom> DragInstance::toX11Actions(uint32_t uActions)
1441	{
1442	RTCList<Atom> actionList;
1443	if (hasDnDCopyAction(uActions))
1444	actionList.append(xAtom(XA_XdndActionCopy));
1445	if (hasDnDMoveAction(uActions))
1446	actionList.append(xAtom(XA_XdndActionMove));
1447	if (hasDnDLinkAction(uActions))
1448	actionList.append(xAtom(XA_XdndActionLink));
1449
1450	return actionList;
1451	}
1452
1453	/* static */
1454	uint32_t DragInstance::toHGCMAction(Atom atom)
1455	{
1456	uint32_t uAction = DND_IGNORE_ACTION;
1457	if (atom == xAtom(XA_XdndActionCopy))
1458	uAction = DND_COPY_ACTION;
1459	else if (atom == xAtom(XA_XdndActionMove))
1460	uAction = DND_MOVE_ACTION;
1461	else if (atom == xAtom(XA_XdndActionLink))
1462	uAction = DND_LINK_ACTION;
1463	return uAction;
1464	}
1465
1466	/* static */
1467	uint32_t DragInstance::toHGCMActions(const RTCList<Atom> &actionsList)
1468	{
1469	uint32_t uActions = DND_IGNORE_ACTION;
1470	for (size_t i = 0; i < actionsList.size(); ++i)
1471	uActions \|= toHGCMAction(actionsList.at(i));
1472	return uActions;
1473	}
1474
1475	/*******************************************************************************
1476	*
1477	* DragAndDropService Implementation
1478	*
1479	******************************************************************************/
1480
1481	RTCList<RTCString> toStringList(void *pvData, uint32_t cData)
1482	{
1483	if ( !pvData
1484	\|\| !cData)
1485	return RTCList<RTCString>();
1486	char pszStr = (char)pvData;
1487	uint32_t cStr = cData;
1488
1489	RTCList<RTCString> strList;
1490	while (cStr > 0)
1491	{
1492	size_t cSize = RTStrNLen(pszStr, cStr);
1493	/* Create a copy with max N chars, so that we are on the save side,
1494	* even if the data isn't zero terminated. */
1495	char *pszTmp = RTStrDupN(pszStr, cSize);
1496	strList.append(pszTmp);
1497	RTStrFree(pszTmp);
1498	pszStr += cSize + 1;
1499	cStr -= cSize + 1;
1500	}
1501
1502	return strList;
1503	}
1504
1505	bool DragAndDropService::waitForXMsg(XEvent &ecm, int type, uint32_t uiMaxMS /* = 100 */)
1506	{
1507	const uint64_t uiStart = RTTimeProgramMilliTS();
1508	do
1509	{
1510	if (!m_eventQueue.isEmpty())
1511	{
1512	DO(("new msg size %d\n", m_eventQueue.size()));
1513	/* Check if there is a client message in the queue. */
1514	for (size_t i = 0; i < m_eventQueue.size(); ++i)
1515	{
1516	DnDEvent e = m_eventQueue.at(i);
1517	if( e.type == DnDEvent::X11_Type)
1518	DO(("new msg\n"));
1519	if( e.type == DnDEvent::X11_Type
1520	&& e.x11.type == type)
1521	{
1522	m_eventQueue.removeAt(i);
1523	ecm = e.x11;
1524	return true;
1525	}
1526	}
1527	}
1528	int rc = RTSemEventWait(m_hEventSem, 25);
1529	// if (RT_FAILURE(rc))
1530	// return false;
1531	}
1532	while(RTTimeProgramMilliTS() - uiStart < uiMaxMS);
1533
1534	return false;
1535	}
1536
1537	void DragAndDropService::clearEventQueue()
1538	{
1539	m_eventQueue.clear();
1540	}
1541
1542	int DragAndDropService::run(bool fDaemonised /* = false */)
1543	{
1544	int rc = VINF_SUCCESS;
1545	LogRelFlowFunc(("\n"));
1546
1547	/* We need to initialize XLib with thread support, otherwise our
1548	* simultaneously access to the display makes trouble (has to be called
1549	* before any usage of XLib). */
1550	if (!XInitThreads())
1551	AssertMsgFailedReturn(("Failed to initialize thread-safe XLib.\n"), VERR_GENERAL_FAILURE);
1552
1553	do
1554	{
1555	/* Initialize our service */
1556	rc = VbglR3DnDInit();
1557	if (RT_FAILURE(rc))
1558	break;
1559
1560	/* Initialize X11 DND */
1561	rc = x11DragAndDropInit();
1562	if (RT_FAILURE(rc))
1563	break;
1564
1565	m_pCurDnD = new DragInstance(m_pDisplay, this);
1566	/* Note: For multiple screen support in VBox it is not necessary to use
1567	* another screen number than zero. Maybe in the future it will become
1568	* necessary if VBox supports multiple X11 screens. */
1569	m_pCurDnD->init(0);
1570	/* Loop over new events */
1571	do
1572	{
1573	DnDEvent e;
1574	RT_ZERO(e);
1575	if (m_eventQueue.isEmpty())
1576	rc = RTSemEventWait(m_hEventSem, 50);
1577	if (!m_eventQueue.isEmpty())
1578	{
1579	e = m_eventQueue.first();
1580	m_eventQueue.removeFirst();
1581	DO(("new msg %d\n", e.type));
1582	if (e.type == DnDEvent::HGCM_Type)
1583	{
1584	switch (e.hgcm.uType)
1585	{
1586	case DragAndDropSvc::HOST_DND_HG_EVT_ENTER:
1587	{
1588	RTCList<RTCString> formats = RTCString(e.hgcm.pszFormats, e.hgcm.cbFormats - 1).split("\r\n");
1589	m_pCurDnD->hgEnter(formats, e.hgcm.u.a.uAllActions);
1590	/* Enter is always followed by a move event. */
1591	}
1592	case DragAndDropSvc::HOST_DND_HG_EVT_MOVE:
1593	{
1594	m_pCurDnD->hgMove(e.hgcm.u.a.uXpos, e.hgcm.u.a.uYpos, e.hgcm.u.a.uDefAction);
1595	break;
1596	}
1597	case DragAndDropSvc::HOST_DND_HG_EVT_LEAVE:
1598	{
1599	m_pCurDnD->reset();
1600	/* Not sure if this is really right! */
1601	clearEventQueue();
1602	break;
1603	}
1604	case DragAndDropSvc::HOST_DND_HG_EVT_DROPPED:
1605	{
1606	m_pCurDnD->hgDrop();
1607	break;
1608	}
1609	case DragAndDropSvc::HOST_DND_HG_SND_DATA:
1610	{
1611	m_pCurDnD->hgDataReceived(e.hgcm.u.b.pvData, e.hgcm.u.b.cbData);
1612	break;
1613	}
1614	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
1615	case DragAndDropSvc::HOST_DND_GH_REQ_PENDING:
1616	{
1617	m_pCurDnD->ghIsDnDPending();
1618	break;
1619	}
1620	case DragAndDropSvc::HOST_DND_GH_EVT_DROPPED:
1621	{
1622	m_pCurDnD->ghDropped(e.hgcm.pszFormats, e.hgcm.u.a.uDefAction);
1623	/* Not sure if this is really right! */
1624	clearEventQueue();
1625	break;
1626	}
1627	#endif
1628	}
1629	/* Some messages require cleanup. */
1630	switch (e.hgcm.uType)
1631	{
1632	case DragAndDropSvc::HOST_DND_HG_EVT_ENTER:
1633	case DragAndDropSvc::HOST_DND_HG_EVT_MOVE:
1634	case DragAndDropSvc::HOST_DND_HG_EVT_DROPPED:
1635	#ifdef VBOX_WITH_DRAG_AND_DROP_GH
1636	case DragAndDropSvc::HOST_DND_GH_EVT_DROPPED:
1637	#endif
1638	{
1639	if (e.hgcm.pszFormats)
1640	RTMemFree(e.hgcm.pszFormats);
1641	break;
1642	}
1643	case DragAndDropSvc::HOST_DND_HG_SND_DATA:
1644	{
1645	if (e.hgcm.pszFormats)
1646	RTMemFree(e.hgcm.pszFormats);
1647	if (e.hgcm.u.b.pvData)
1648	RTMemFree(e.hgcm.u.b.pvData);
1649	break;
1650	}
1651	}
1652
1653	}
1654	else if(e.type == DnDEvent::X11_Type)
1655	{
1656	DO(("X11 type: %u\n", e.x11.type));
1657	/* Now the X11 event stuff */
1658	switch (e.x11.type)
1659	{
1660	case SelectionRequest: m_pCurDnD->hgX11SelectionRequest(e.x11); break;
1661	case ClientMessage: m_pCurDnD->hgX11ClientMessage(e.x11); break;
1662	case SelectionClear: DO(("DnD_CLER\n")); break;
1663	// case MotionNotify: m_pCurDnD->hide(); break;
1664	}
1665	}
1666	}
1667	}while(!ASMAtomicReadBool(&m_fSrvStopping));
1668	}while(0);
1669
1670	LogRelFlowFunc(("returning %Rrc\n", rc));
1671	return rc;
1672	}
1673
1674	int DragAndDropService::x11DragAndDropInit()
1675	{
1676	/* Connect to the x11 server. */
1677	m_pDisplay = XOpenDisplay(NULL);
1678	if (!m_pDisplay)
1679	/* todo: correct errors */
1680	return VERR_NOT_FOUND;
1681
1682	xHelpers::instance(m_pDisplay);
1683
1684	int rc = VINF_SUCCESS;
1685	do
1686	{
1687	/* Signal a new event to our main loop. */
1688	rc = RTSemEventCreate(&m_hEventSem);
1689	if (RT_FAILURE(rc))
1690	break;
1691	/* Event thread for events coming from the HGCM device. */
1692	rc = RTThreadCreate(&m_hHGCMThread, hgcmEventThread, this,
1693	0, RTTHREADTYPE_MSG_PUMP, RTTHREADFLAGS_WAITABLE,
1694	"HGCM-NOTIFY");
1695	if (RT_FAILURE(rc))
1696	break;
1697	/* Event thread for events coming from the x11 system. */
1698	rc = RTThreadCreate(&m_hX11Thread, x11EventThread, this,
1699	0, RTTHREADTYPE_MSG_PUMP, RTTHREADFLAGS_WAITABLE,
1700	"X11-NOTIFY");
1701	}while(0);
1702
1703	/* Cleanup on failure */
1704	if (RT_FAILURE(rc))
1705	x11DragAndDropTerm();
1706
1707	return rc;
1708	}
1709
1710	int DragAndDropService::x11DragAndDropTerm()
1711	{
1712	/* Mark that we are stopping. */
1713	ASMAtomicWriteBool(&m_fSrvStopping, true);
1714
1715	/* Send a x11 client messages to the x11 event loop. */
1716	XClientMessageEvent m;
1717	RT_ZERO(m);
1718	m.type = ClientMessage;
1719	m.display = m_pDisplay;
1720	m.window = None;
1721	m.message_type = xAtom(XA_dndstop);
1722	m.format = 32;
1723	int xrc = XSendEvent(m_pDisplay, None, True, NoEventMask, reinterpret_cast<XEvent*>(&m));
1724	if (RT_UNLIKELY(xrc == 0))
1725	DO(("DnD_TERM: error sending xevent\n"));
1726	/* Wait for our event threads to stop. */
1727	// if (m_hX11Thread)
1728	// RTThreadWait(m_hX11Thread, RT_INDEFINITE_WAIT, 0);
1729	// if (m_hHGCMThread)
1730	// RTThreadWait(m_hHGCMThread, RT_INDEFINITE_WAIT, 0);
1731	/* Cleanup */
1732	/* todo: This doesn't work. The semaphore was interrupted by the user
1733	* signal. It is not possible to destroy a semaphore while it is in interrupted state.
1734	* According to Frank, the cleanup stuff done here is done _wrong_. We just
1735	* should signal the main loop to stop and do the cleanup there. Needs
1736	* adoption in all VBoxClient::Service's. */
1737	// if (m_hEventSem)
1738	// RTSemEventDestroy(m_hEventSem);
1739	if (m_pDisplay)
1740	XCloseDisplay(m_pDisplay);
1741	return VINF_SUCCESS;
1742	}
1743
1744	/* static */
1745	int DragAndDropService::hgcmEventThread(RTTHREAD hThread, void *pvUser)
1746	{
1747	AssertPtrReturn(pvUser, VERR_INVALID_PARAMETER);
1748	DragAndDropService pSrv = static_cast<DragAndDropService>(pvUser);
1749	DnDEvent e;
1750	do
1751	{
1752	RT_ZERO(e);
1753	e.type = DnDEvent::HGCM_Type;
1754	/* Wait for new events */
1755	int rc = VbglR3DnDProcessNextMessage(&e.hgcm);
1756	if (RT_SUCCESS(rc))
1757	{
1758	pSrv->m_eventQueue.append(e);
1759	rc = RTSemEventSignal(pSrv->m_hEventSem);
1760	if (RT_FAILURE(rc))
1761	return rc;
1762	}
1763	}while(!ASMAtomicReadBool(&pSrv->m_fSrvStopping));
1764
1765	return VINF_SUCCESS;
1766	}
1767
1768	/* static */
1769	int DragAndDropService::x11EventThread(RTTHREAD hThread, void *pvUser)
1770	{
1771	AssertPtrReturn(pvUser, VERR_INVALID_PARAMETER);
1772	DragAndDropService pSrv = static_cast<DragAndDropService>(pvUser);
1773	DnDEvent e;
1774	do
1775	{
1776	/* Wait for new events. We can't use XIfEvent here, cause this locks
1777	* the window connection with a mutex and if no X11 events occurs this
1778	* blocks any other calls we made to X11. So instead check for new
1779	* events and if there are not any new one, sleep for a certain amount
1780	* of time. */
1781	if (XEventsQueued(pSrv->m_pDisplay, QueuedAfterFlush) > 0)
1782	{
1783	RT_ZERO(e);
1784	e.type = DnDEvent::X11_Type;
1785	XNextEvent(pSrv->m_pDisplay, &e.x11);
1786	/* Check for a stop message. */
1787	// if ( e.x11.type == ClientMessage
1788	// && e.x11.xclient.message_type == xAtom(XA_dndstop))
1789	// {
1790	// break;
1791	// }
1792	// if (isDnDRespondEvent(pSrv->m_pDisplay, &e.x11, 0))
1793	{
1794	/* Appending makes a copy of the event structure. */
1795	pSrv->m_eventQueue.append(e);
1796	int rc = RTSemEventSignal(pSrv->m_hEventSem);
1797	if (RT_FAILURE(rc))
1798	return rc;
1799	}
1800	}
1801	else
1802	RTThreadSleep(25);
1803	} while(!ASMAtomicReadBool(&pSrv->m_fSrvStopping));
1804
1805	return VINF_SUCCESS;
1806	}
1807
1808	/* Static factory */
1809	VBoxClient::Service *VBoxClient::GetDragAndDropService()
1810	{
1811	return new(DragAndDropService);
1812	}

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source: vbox/trunk/src/VBox/Additions/x11/VBoxClient/draganddrop.cpp@ 42261

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