VBoxClipboard.cpp@ 69361

Last change on this file since 69361 was 69361, checked in by vboxsync, 7 years ago
VBoxTray: scm cleanups
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1	/* $Id: VBoxClipboard.cpp 69361 2017-10-26 14:51:38Z vboxsync $ */
2	/** @file
3	* VBoxClipboard - Shared clipboard, Windows Guest Implementation.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#include "VBoxTray.h"
23	#include "VBoxHelpers.h"
24
25	#include <iprt/asm.h>
26	#include <iprt/ldr.h>
27
28	#include <VBox/HostServices/VBoxClipboardSvc.h>
29	#include <strsafe.h>
30
31	#ifdef DEBUG /** @todo r=bird: these are all default values. sigh. */
32	# define LOG_ENABLED
33	# define LOG_GROUP LOG_GROUP_SHARED_CLIPBOARD
34	#endif
35	#include <VBox/log.h>
36
37
38	/*********************************************************************************************************************************
39	* Structures and Typedefs *
40	*********************************************************************************************************************************/
41	/* Dynamically load clipboard functions from User32.dll. */
42	typedef BOOL WINAPI FNADDCLIPBOARDFORMATLISTENER(HWND);
43	typedef FNADDCLIPBOARDFORMATLISTENER *PFNADDCLIPBOARDFORMATLISTENER;
44
45	typedef BOOL WINAPI FNREMOVECLIPBOARDFORMATLISTENER(HWND);
46	typedef FNREMOVECLIPBOARDFORMATLISTENER *PFNREMOVECLIPBOARDFORMATLISTENER;
47
48	#ifndef WM_CLIPBOARDUPDATE
49	#define WM_CLIPBOARDUPDATE 0x031D
50	#endif
51
52	typedef struct _VBOXCLIPBOARDCONTEXT
53	{
54	const VBOXSERVICEENV *pEnv;
55	uint32_t u32ClientID;
56	ATOM wndClass;
57	HWND hwnd;
58	HWND hwndNextInChain;
59	UINT timerRefresh;
60	bool fCBChainPingInProcess;
61	PFNADDCLIPBOARDFORMATLISTENER pfnAddClipboardFormatListener;
62	PFNREMOVECLIPBOARDFORMATLISTENER pfnRemoveClipboardFormatListener;
63	} VBOXCLIPBOARDCONTEXT, *PVBOXCLIPBOARDCONTEXT;
64
65	enum { CBCHAIN_TIMEOUT = 5000 /* ms */ };
66
67
68	/*********************************************************************************************************************************
69	* Header Files *
70	*********************************************************************************************************************************/
71	/** Static since it is the single instance. Directly used in the windows proc. */
72	static VBOXCLIPBOARDCONTEXT g_Ctx = { NULL };
73
74	static char s_szClipWndClassName[] = "VBoxSharedClipboardClass";
75
76
77	static void vboxClipboardInitNewAPI(VBOXCLIPBOARDCONTEXT *pCtx)
78	{
79	RTLDRMOD hUser32 = NIL_RTLDRMOD;
80	int rc = RTLdrLoadSystem("User32.dll", /* fNoUnload = */ true, &hUser32);
81	if (RT_SUCCESS(rc))
82	{
83	rc = RTLdrGetSymbol(hUser32, "AddClipboardFormatListener", (void**)&pCtx->pfnAddClipboardFormatListener);
84	if (RT_SUCCESS(rc))
85	{
86	rc = RTLdrGetSymbol(hUser32, "RemoveClipboardFormatListener", (void**)&pCtx->pfnRemoveClipboardFormatListener);
87	}
88
89	RTLdrClose(hUser32);
90	}
91
92	if (RT_SUCCESS(rc))
93	{
94	Log(("New Clipboard API is enabled\n"));
95	}
96	else
97	{
98	pCtx->pfnAddClipboardFormatListener = NULL;
99	pCtx->pfnRemoveClipboardFormatListener = NULL;
100	Log(("New Clipboard API is not available. rc = %Rrc\n", rc));
101	}
102	}
103
104	static bool vboxClipboardIsNewAPI(VBOXCLIPBOARDCONTEXT *pCtx)
105	{
106	return pCtx->pfnAddClipboardFormatListener != NULL;
107	}
108
109
110	static int vboxOpenClipboard(HWND hwnd)
111	{
112	/* "OpenClipboard fails if another window has the clipboard open."
113	* So try a few times and wait up to 1 second.
114	*/
115	BOOL fOpened = FALSE;
116
117	int i = 0;
118	for (;;)
119	{
120	if (OpenClipboard(hwnd))
121	{
122	fOpened = TRUE;
123	break;
124	}
125
126	if (i >= 10) /* sleep interval = [1..512] ms */
127	break;
128
129	RTThreadSleep(1 << i);
130	++i;
131	}
132
133	#ifdef LOG_ENABLED
134	if (i > 0)
135	LogFlowFunc(("%d times tried to open clipboard.\n", i + 1));
136	#endif
137
138	int rc;
139	if (fOpened)
140	rc = VINF_SUCCESS;
141	else
142	{
143	const DWORD err = GetLastError();
144	LogFlowFunc(("error %d\n", err));
145	rc = RTErrConvertFromWin32(err);
146	}
147
148	return rc;
149	}
150
151
152	static int vboxClipboardChanged(PVBOXCLIPBOARDCONTEXT pCtx)
153	{
154	AssertPtr(pCtx);
155
156	/* Query list of available formats and report to host. */
157	int rc = vboxOpenClipboard(pCtx->hwnd);
158	if (RT_SUCCESS(rc))
159	{
160	uint32_t u32Formats = 0;
161	UINT format = 0;
162
163	while ((format = EnumClipboardFormats(format)) != 0)
164	{
165	LogFlowFunc(("vboxClipboardChanged: format = 0x%08X\n", format));
166	switch (format)
167	{
168	case CF_UNICODETEXT:
169	case CF_TEXT:
170	u32Formats \|= VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT;
171	break;
172
173	case CF_DIB:
174	case CF_BITMAP:
175	u32Formats \|= VBOX_SHARED_CLIPBOARD_FMT_BITMAP;
176	break;
177
178	default:
179	{
180	if (format >= 0xC000)
181	{
182	TCHAR szFormatName[256];
183
184	int cActual = GetClipboardFormatName(format, szFormatName, sizeof(szFormatName)/sizeof (TCHAR));
185	if (cActual)
186	{
187	if (strcmp (szFormatName, "HTML Format") == 0)
188	{
189	u32Formats \|= VBOX_SHARED_CLIPBOARD_FMT_HTML;
190	}
191	}
192	}
193	break;
194	}
195	}
196	}
197
198	CloseClipboard();
199	rc = VbglR3ClipboardReportFormats(pCtx->u32ClientID, u32Formats);
200	}
201	else
202	{
203	LogFlow(("vboxClipboardChanged: error in open clipboard. hwnd: %x. err: %Rrc\n", pCtx->hwnd, rc));
204	}
205	return rc;
206	}
207
208	/* Add ourselves into the chain of cliboard listeners */
209	static void vboxClipboardAddToCBChain(PVBOXCLIPBOARDCONTEXT pCtx)
210	{
211	AssertPtrReturnVoid(pCtx);
212	if (vboxClipboardIsNewAPI(pCtx))
213	pCtx->pfnAddClipboardFormatListener(pCtx->hwnd);
214	else
215	pCtx->hwndNextInChain = SetClipboardViewer(pCtx->hwnd);
216	/** @todo r=andy Return code?? */
217	}
218
219	/* Remove ourselves from the chain of cliboard listeners */
220	static void vboxClipboardRemoveFromCBChain(PVBOXCLIPBOARDCONTEXT pCtx)
221	{
222	AssertPtrReturnVoid(pCtx);
223
224	if (vboxClipboardIsNewAPI(pCtx))
225	{
226	pCtx->pfnRemoveClipboardFormatListener(pCtx->hwnd);
227	}
228	else
229	{
230	ChangeClipboardChain(pCtx->hwnd, pCtx->hwndNextInChain);
231	pCtx->hwndNextInChain = NULL;
232	}
233	/** @todo r=andy Return code?? */
234	}
235
236	/* Callback which is invoked when we have successfully pinged ourselves down the
237	* clipboard chain. We simply unset a boolean flag to say that we are responding.
238	* There is a race if a ping returns after the next one is initiated, but nothing
239	* very bad is likely to happen. */
240	VOID CALLBACK vboxClipboardChainPingProc(HWND hWnd, UINT uMsg, ULONG_PTR dwData, LRESULT lResult)
241	{
242	NOREF(hWnd);
243	NOREF(uMsg);
244	NOREF(lResult);
245
246	/** @todo r=andy Why not using SetWindowLongPtr for keeping the context? */
247	PVBOXCLIPBOARDCONTEXT pCtx = (PVBOXCLIPBOARDCONTEXT)dwData;
248	AssertPtr(pCtx);
249
250	pCtx->fCBChainPingInProcess = FALSE;
251	}
252
253	static LRESULT vboxClipboardProcessMsg(PVBOXCLIPBOARDCONTEXT pCtx, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
254	{
255	AssertPtr(pCtx);
256
257	LRESULT rc = 0;
258
259	switch (msg)
260	{
261	case WM_CLIPBOARDUPDATE:
262	{
263	Log(("WM_CLIPBOARDUPDATE\n"));
264
265	if (GetClipboardOwner() != hwnd)
266	{
267	/* Clipboard was updated by another application. */
268	vboxClipboardChanged(pCtx);
269	}
270	} break;
271
272	case WM_CHANGECBCHAIN:
273	{
274	if (vboxClipboardIsNewAPI(pCtx))
275	{
276	rc = DefWindowProc(hwnd, msg, wParam, lParam);
277	break;
278	}
279
280	HWND hwndRemoved = (HWND)wParam;
281	HWND hwndNext = (HWND)lParam;
282
283	LogFlowFunc(("WM_CHANGECBCHAIN: hwndRemoved %p, hwndNext %p, hwnd %p\n", hwndRemoved, hwndNext, pCtx->hwnd));
284
285	if (hwndRemoved == pCtx->hwndNextInChain)
286	{
287	/* The window that was next to our in the chain is being removed.
288	* Relink to the new next window. */
289	pCtx->hwndNextInChain = hwndNext;
290	}
291	else
292	{
293	if (pCtx->hwndNextInChain)
294	{
295	/* Pass the message further. */
296	DWORD_PTR dwResult;
297	rc = SendMessageTimeout(pCtx->hwndNextInChain, WM_CHANGECBCHAIN, wParam, lParam, 0, CBCHAIN_TIMEOUT, &dwResult);
298	if (!rc)
299	rc = (LRESULT) dwResult;
300	}
301	}
302	} break;
303
304	case WM_DRAWCLIPBOARD:
305	{
306	LogFlowFunc(("WM_DRAWCLIPBOARD, hwnd %p\n", pCtx->hwnd));
307
308	if (GetClipboardOwner() != hwnd)
309	{
310	/* Clipboard was updated by another application. */
311	/* WM_DRAWCLIPBOARD always expects a return code of 0, so don't change "rc" here. */
312	int vboxrc = vboxClipboardChanged(pCtx);
313	if (RT_FAILURE(vboxrc))
314	LogFlowFunc(("vboxClipboardChanged failed, rc = %Rrc\n", vboxrc));
315	}
316
317	if (pCtx->hwndNextInChain)
318	{
319	/* Pass the message to next windows in the clipboard chain. */
320	SendMessageTimeout(pCtx->hwndNextInChain, msg, wParam, lParam, 0, CBCHAIN_TIMEOUT, NULL);
321	}
322	} break;
323
324	case WM_TIMER:
325	{
326	if (vboxClipboardIsNewAPI(pCtx))
327	break;
328
329	HWND hViewer = GetClipboardViewer();
330
331	/* Re-register ourselves in the clipboard chain if our last ping
332	* timed out or there seems to be no valid chain. */
333	if (!hViewer \|\| pCtx->fCBChainPingInProcess)
334	{
335	vboxClipboardRemoveFromCBChain(pCtx);
336	vboxClipboardAddToCBChain(pCtx);
337	}
338	/* Start a new ping by passing a dummy WM_CHANGECBCHAIN to be
339	* processed by ourselves to the chain. */
340	pCtx->fCBChainPingInProcess = TRUE;
341	hViewer = GetClipboardViewer();
342	if (hViewer)
343	SendMessageCallback(hViewer, WM_CHANGECBCHAIN, (WPARAM)pCtx->hwndNextInChain, (LPARAM)pCtx->hwndNextInChain, vboxClipboardChainPingProc, (ULONG_PTR)pCtx);
344	} break;
345
346	case WM_CLOSE:
347	{
348	/* Do nothing. Ignore the message. */
349	} break;
350
351	case WM_RENDERFORMAT:
352	{
353	/* Insert the requested clipboard format data into the clipboard. */
354	uint32_t u32Format = 0;
355	UINT format = (UINT)wParam;
356
357	LogFlowFunc(("WM_RENDERFORMAT, format = %x\n", format));
358	switch (format)
359	{
360	case CF_UNICODETEXT:
361	u32Format \|= VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT;
362	break;
363
364	case CF_DIB:
365	u32Format \|= VBOX_SHARED_CLIPBOARD_FMT_BITMAP;
366	break;
367
368	default:
369	if (format >= 0xC000)
370	{
371	TCHAR szFormatName[256];
372
373	int cActual = GetClipboardFormatName(format, szFormatName, sizeof(szFormatName)/sizeof (TCHAR));
374	if (cActual)
375	{
376	if (strcmp (szFormatName, "HTML Format") == 0)
377	{
378	u32Format \|= VBOX_SHARED_CLIPBOARD_FMT_HTML;
379	}
380	}
381	}
382	break;
383	}
384
385	if (u32Format == 0)
386	{
387	/* Unsupported clipboard format is requested. */
388	LogFlowFunc(("Unsupported clipboard format requested: %ld\n", u32Format));
389	EmptyClipboard();
390	}
391	else
392	{
393	const uint32_t cbPrealloc = 4096; /** @todo r=andy Make it dynamic for supporting larger text buffers! */
394	uint32_t cb = 0;
395
396	/* Preallocate a buffer, most of small text transfers will fit into it. */
397	HANDLE hMem = GlobalAlloc(GMEM_DDESHARE \| GMEM_MOVEABLE, cbPrealloc);
398	LogFlowFunc(("Preallocated handle hMem = %p\n", hMem));
399
400	if (hMem)
401	{
402	void *pMem = GlobalLock(hMem);
403	LogFlowFunc(("Locked pMem = %p, GlobalSize = %ld\n", pMem, GlobalSize(hMem)));
404
405	if (pMem)
406	{
407	/* Read the host data to the preallocated buffer. */
408	int vboxrc = VbglR3ClipboardReadData(pCtx->u32ClientID, u32Format, pMem, cbPrealloc, &cb);
409	LogFlowFunc(("VbglR3ClipboardReadData returned with rc = %Rrc\n", vboxrc));
410
411	if (RT_SUCCESS(vboxrc))
412	{
413	if (cb == 0)
414	{
415	/* 0 bytes returned means the clipboard is empty.
416	* Deallocate the memory and set hMem to NULL to get to
417	* the clipboard empty code path. */
418	GlobalUnlock(hMem);
419	GlobalFree(hMem);
420	hMem = NULL;
421	}
422	else if (cb > cbPrealloc)
423	{
424	GlobalUnlock(hMem);
425
426	/* The preallocated buffer is too small, adjust the size. */
427	hMem = GlobalReAlloc(hMem, cb, 0);
428	LogFlowFunc(("Reallocated hMem = %p\n", hMem));
429
430	if (hMem)
431	{
432	pMem = GlobalLock(hMem);
433	LogFlowFunc(("Locked pMem = %p, GlobalSize = %ld\n", pMem, GlobalSize(hMem)));
434
435	if (pMem)
436	{
437	/* Read the host data to the preallocated buffer. */
438	uint32_t cbNew = 0;
439	vboxrc = VbglR3ClipboardReadData(pCtx->u32ClientID, u32Format, pMem, cb, &cbNew);
440	LogFlowFunc(("VbglR3ClipboardReadData returned with rc = %Rrc, cb = %d, cbNew = %d\n", vboxrc, cb, cbNew));
441
442	if (RT_SUCCESS (vboxrc) && cbNew <= cb)
443	{
444	cb = cbNew;
445	}
446	else
447	{
448	GlobalUnlock(hMem);
449	GlobalFree(hMem);
450	hMem = NULL;
451	}
452	}
453	else
454	{
455	GlobalFree(hMem);
456	hMem = NULL;
457	}
458	}
459	}
460
461	if (hMem)
462	{
463	/* pMem is the address of the data. cb is the size of returned data. */
464	/* Verify the size of returned text, the memory block for clipboard
465	* must have the exact string size.
466	*/
467	if (u32Format == VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
468	{
469	size_t cbActual = 0;
470	HRESULT hrc = StringCbLengthW((LPWSTR)pMem, cb, &cbActual);
471	if (FAILED (hrc))
472	{
473	/* Discard invalid data. */
474	GlobalUnlock(hMem);
475	GlobalFree(hMem);
476	hMem = NULL;
477	}
478	else
479	{
480	/* cbActual is the number of bytes, excluding those used
481	* for the terminating null character.
482	*/
483	cb = (uint32_t)(cbActual + 2);
484	}
485	}
486	}
487
488	if (hMem)
489	{
490	GlobalUnlock(hMem);
491
492	hMem = GlobalReAlloc(hMem, cb, 0);
493	LogFlowFunc(("Reallocated hMem = %p\n", hMem));
494
495	if (hMem)
496	{
497	/* 'hMem' contains the host clipboard data.
498	* size is 'cb' and format is 'format'. */
499	HANDLE hClip = SetClipboardData(format, hMem);
500	LogFlowFunc(("WM_RENDERFORMAT hClip = %p\n", hClip));
501
502	if (hClip)
503	{
504	/* The hMem ownership has gone to the system. Finish the processing. */
505	break;
506	}
507
508	/* Cleanup follows. */
509	}
510	}
511	}
512	if (hMem)
513	GlobalUnlock(hMem);
514	}
515	if (hMem)
516	GlobalFree(hMem);
517	}
518
519	/* Something went wrong. */
520	EmptyClipboard();
521	}
522	} break;
523
524	case WM_RENDERALLFORMATS:
525	{
526	/* Do nothing. The clipboard formats will be unavailable now, because the
527	* windows is to be destroyed and therefore the guest side becomes inactive.
528	*/
529	int vboxrc = vboxOpenClipboard(hwnd);
530	if (RT_SUCCESS(vboxrc))
531	{
532	EmptyClipboard();
533	CloseClipboard();
534	}
535	else
536	{
537	LogFlowFunc(("WM_RENDERALLFORMATS: Failed to open clipboard! rc: %Rrc\n", vboxrc));
538	}
539	} break;
540
541	case WM_USER:
542	{
543	/* Announce available formats. Do not insert data, they will be inserted in WM_RENDER. /
544	uint32_t u32Formats = (uint32_t)lParam;
545
546	int vboxrc = vboxOpenClipboard(hwnd);
547	if (RT_SUCCESS(vboxrc))
548	{
549	EmptyClipboard();
550
551	HANDLE hClip = NULL;
552
553	if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
554	{
555	LogFlowFunc(("WM_USER: VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT\n"));
556	hClip = SetClipboardData(CF_UNICODETEXT, NULL);
557	}
558
559	if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_BITMAP)
560	{
561	LogFlowFunc(("WM_USER: VBOX_SHARED_CLIPBOARD_FMT_BITMAP\n"));
562	hClip = SetClipboardData(CF_DIB, NULL);
563	}
564
565	if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_HTML)
566	{
567	UINT format = RegisterClipboardFormat ("HTML Format");
568	LogFlowFunc(("WM_USER: VBOX_SHARED_CLIPBOARD_FMT_HTML 0x%04X\n", format));
569	if (format != 0)
570	{
571	hClip = SetClipboardData(format, NULL);
572	}
573	}
574
575	CloseClipboard();
576	LogFlowFunc(("WM_USER: hClip = %p, err = %ld\n", hClip, GetLastError ()));
577	}
578	else
579	{
580	LogFlowFunc(("WM_USER: Failed to open clipboard! error = %Rrc\n", vboxrc));
581	}
582	} break;
583
584	case WM_USER + 1:
585	{
586	/* Send data in the specified format to the host. */
587	uint32_t u32Formats = (uint32_t)lParam;
588	HANDLE hClip = NULL;
589
590	int vboxrc = vboxOpenClipboard(hwnd);
591	if (RT_SUCCESS(vboxrc))
592	{
593	if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_BITMAP)
594	{
595	hClip = GetClipboardData(CF_DIB);
596
597	if (hClip != NULL)
598	{
599	LPVOID lp = GlobalLock(hClip);
600	if (lp != NULL)
601	{
602	LogFlowFunc(("WM_USER + 1: CF_DIB\n"));
603	vboxrc = VbglR3ClipboardWriteData(pCtx->u32ClientID, VBOX_SHARED_CLIPBOARD_FMT_BITMAP,
604	lp, GlobalSize(hClip));
605	GlobalUnlock(hClip);
606	}
607	else
608	{
609	hClip = NULL;
610	}
611	}
612	}
613	else if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT)
614	{
615	hClip = GetClipboardData(CF_UNICODETEXT);
616
617	if (hClip != NULL)
618	{
619	LPWSTR uniString = (LPWSTR)GlobalLock(hClip);
620
621	if (uniString != NULL)
622	{
623	LogFlowFunc(("WM_USER + 1: CF_UNICODETEXT\n"));
624	vboxrc = VbglR3ClipboardWriteData(pCtx->u32ClientID, VBOX_SHARED_CLIPBOARD_FMT_UNICODETEXT,
625	uniString, (lstrlenW(uniString) + 1) * 2);
626	GlobalUnlock(hClip);
627	}
628	else
629	{
630	hClip = NULL;
631	}
632	}
633	}
634	else if (u32Formats & VBOX_SHARED_CLIPBOARD_FMT_HTML)
635	{
636	UINT format = RegisterClipboardFormat ("HTML Format");
637	if (format != 0)
638	{
639	hClip = GetClipboardData(format);
640	if (hClip != NULL)
641	{
642	LPVOID lp = GlobalLock(hClip);
643
644	if (lp != NULL)
645	{
646	LogFlowFunc(("WM_USER + 1: CF_HTML\n"));
647	vboxrc = VbglR3ClipboardWriteData(pCtx->u32ClientID, VBOX_SHARED_CLIPBOARD_FMT_HTML,
648	lp, GlobalSize(hClip));
649	GlobalUnlock(hClip);
650	}
651	else
652	{
653	hClip = NULL;
654	}
655	}
656	}
657	}
658
659	CloseClipboard();
660	}
661	else
662	{
663	LogFlowFunc(("WM_USER: Failed to open clipboard! rc: %Rrc\n", vboxrc));
664	}
665
666	if (hClip == NULL)
667	{
668	/* Requested clipboard format is not available, send empty data. */
669	VbglR3ClipboardWriteData(pCtx->u32ClientID, 0, NULL, 0);
670	}
671	} break;
672
673	case WM_DESTROY:
674	{
675	vboxClipboardRemoveFromCBChain(pCtx);
676	if (pCtx->timerRefresh)
677	KillTimer(pCtx->hwnd, 0);
678	/*
679	* don't need to call PostQuitMessage cause
680	* the VBoxTray already finished a message loop
681	*/
682	} break;
683
684	default:
685	{
686	rc = DefWindowProc(hwnd, msg, wParam, lParam);
687	}
688	}
689
690	#ifndef DEBUG_andy
691	LogFlowFunc(("vboxClipboardProcessMsg returned with rc = %ld\n", rc));
692	#endif
693	return rc;
694	}
695
696	static LRESULT CALLBACK vboxClipboardWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
697
698	static int vboxClipboardCreateWindow(PVBOXCLIPBOARDCONTEXT pCtx)
699	{
700	AssertPtrReturn(pCtx, VERR_INVALID_POINTER);
701
702	int rc = VINF_SUCCESS;
703
704	AssertPtr(pCtx->pEnv);
705	HINSTANCE hInstance = pCtx->pEnv->hInstance;
706	Assert(hInstance != 0);
707
708	/* Register the Window Class. */
709	WNDCLASSEX wc = { 0 };
710	wc.cbSize = sizeof(WNDCLASSEX);
711
712	if (!GetClassInfoEx(hInstance, s_szClipWndClassName, &wc))
713	{
714	wc.style = CS_NOCLOSE;
715	wc.lpfnWndProc = vboxClipboardWndProc;
716	wc.hInstance = pCtx->pEnv->hInstance;
717	wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND + 1);
718	wc.lpszClassName = s_szClipWndClassName;
719
720	pCtx->wndClass = RegisterClassEx(&wc);
721	if (pCtx->wndClass == 0)
722	rc = RTErrConvertFromWin32(GetLastError());
723	}
724
725	if (RT_SUCCESS(rc))
726	{
727	/* Create the window. */
728	pCtx->hwnd = CreateWindowEx(WS_EX_TOOLWINDOW \| WS_EX_TRANSPARENT \| WS_EX_TOPMOST,
729	s_szClipWndClassName, s_szClipWndClassName,
730	WS_POPUPWINDOW,
731	-200, -200, 100, 100, NULL, NULL, hInstance, NULL);
732	if (pCtx->hwnd == NULL)
733	{
734	rc = VERR_NOT_SUPPORTED;
735	}
736	else
737	{
738	SetWindowPos(pCtx->hwnd, HWND_TOPMOST, -200, -200, 0, 0,
739	SWP_NOACTIVATE \| SWP_HIDEWINDOW \| SWP_NOCOPYBITS \| SWP_NOREDRAW \| SWP_NOSIZE);
740
741	vboxClipboardAddToCBChain(pCtx);
742	if (!vboxClipboardIsNewAPI(pCtx))
743	pCtx->timerRefresh = SetTimer(pCtx->hwnd, 0, 10 * 1000, NULL);
744	}
745	}
746
747	LogFlowFuncLeaveRC(rc);
748	return rc;
749	}
750
751	static void vboxClipboardDestroy(PVBOXCLIPBOARDCONTEXT pCtx)
752	{
753	AssertPtrReturnVoid(pCtx);
754
755	if (pCtx->hwnd)
756	{
757	DestroyWindow(pCtx->hwnd);
758	pCtx->hwnd = NULL;
759	}
760
761	if (pCtx->wndClass != 0)
762	{
763	UnregisterClass(s_szClipWndClassName, pCtx->pEnv->hInstance);
764	pCtx->wndClass = 0;
765	}
766	}
767
768	static LRESULT CALLBACK vboxClipboardWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
769	{
770	PVBOXCLIPBOARDCONTEXT pCtx = &g_Ctx; /** @todo r=andy Make pCtx available through SetWindowLongPtr() / GWL_USERDATA. */
771	AssertPtr(pCtx);
772
773	/* Forward with proper context. */
774	return vboxClipboardProcessMsg(pCtx, hWnd, uMsg, wParam, lParam);
775	}
776
777	DECLCALLBACK(int) VBoxClipboardInit(const PVBOXSERVICEENV pEnv, void **ppInstance)
778	{
779	LogFlowFuncEnter();
780
781	PVBOXCLIPBOARDCONTEXT pCtx = &g_Ctx; /* Only one instance for now. */
782	AssertPtr(pCtx);
783
784	if (pCtx->pEnv)
785	{
786	/* Clipboard was already initialized. 2 or more instances are not supported. */
787	return VERR_NOT_SUPPORTED;
788	}
789
790	if (VbglR3AutoLogonIsRemoteSession())
791	{
792	/* Do not use clipboard for remote sessions. */
793	LogRel(("Clipboard: Clipboard has been disabled for a remote session\n"));
794	return VERR_NOT_SUPPORTED;
795	}
796
797	RT_BZERO(pCtx, sizeof(VBOXCLIPBOARDCONTEXT));
798	pCtx->pEnv = pEnv;
799
800	/* Check that new Clipboard API is available */
801	vboxClipboardInitNewAPI(pCtx);
802
803	int rc = VbglR3ClipboardConnect(&pCtx->u32ClientID);
804	if (RT_SUCCESS(rc))
805	{
806	rc = vboxClipboardCreateWindow(pCtx);
807	if (RT_SUCCESS(rc))
808	{
809	*ppInstance = pCtx;
810	}
811	else
812	{
813	VbglR3ClipboardDisconnect(pCtx->u32ClientID);
814	}
815	}
816
817	LogFlowFuncLeaveRC(rc);
818	return rc;
819	}
820
821	DECLCALLBACK(int) VBoxClipboardWorker(void pInstance, bool volatile pfShutdown)
822	{
823	AssertPtr(pInstance);
824	LogFlowFunc(("pInstance=%p\n", pInstance));
825
826	/*
827	* Tell the control thread that it can continue
828	* spawning services.
829	*/
830	RTThreadUserSignal(RTThreadSelf());
831
832	PVBOXCLIPBOARDCONTEXT pCtx = (PVBOXCLIPBOARDCONTEXT)pInstance;
833	AssertPtr(pCtx);
834
835	int rc;
836
837	/* The thread waits for incoming messages from the host. */
838	for (;;)
839	{
840	uint32_t u32Msg;
841	uint32_t u32Formats;
842	rc = VbglR3ClipboardGetHostMsg(pCtx->u32ClientID, &u32Msg, &u32Formats);
843	if (RT_FAILURE(rc))
844	{
845	if (rc == VERR_INTERRUPTED)
846	break;
847
848	LogFlowFunc(("Error getting host message, rc=%Rrc\n", rc));
849
850	if (*pfShutdown)
851	break;
852
853	/* Wait a bit before retrying. */
854	RTThreadSleep(1000);
855	continue;
856	}
857	else
858	{
859	LogFlowFunc(("u32Msg=%RU32, u32Formats=0x%x\n", u32Msg, u32Formats));
860	switch (u32Msg)
861	{
862	/** @todo r=andy: Use a \#define for WM_USER (+1). */
863	case VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS:
864	{
865	/* The host has announced available clipboard formats.
866	* Forward the information to the window, so it can later
867	* respond to WM_RENDERFORMAT message. */
868	::PostMessage(pCtx->hwnd, WM_USER, 0, u32Formats);
869	} break;
870
871	case VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA:
872	{
873	/* The host needs data in the specified format. */
874	::PostMessage(pCtx->hwnd, WM_USER + 1, 0, u32Formats);
875	} break;
876
877	case VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT:
878	{
879	/* The host is terminating. */
880	LogRel(("Clipboard: Terminating ...\n"));
881	ASMAtomicXchgBool(pfShutdown, true);
882	} break;
883
884	default:
885	{
886	LogFlowFunc(("Unsupported message from host, message=%RU32\n", u32Msg));
887
888	/* Wait a bit before retrying. */
889	RTThreadSleep(1000);
890	} break;
891	}
892	}
893
894	if (*pfShutdown)
895	break;
896	}
897
898	LogFlowFuncLeaveRC(rc);
899	return rc;
900	}
901
902	DECLCALLBACK(int) VBoxClipboardStop(void *pInstance)
903	{
904	AssertPtrReturn(pInstance, VERR_INVALID_POINTER);
905
906	LogFunc(("Stopping pInstance=%p\n", pInstance));
907
908	PVBOXCLIPBOARDCONTEXT pCtx = (PVBOXCLIPBOARDCONTEXT)pInstance;
909	AssertPtr(pCtx);
910
911	VbglR3ClipboardDisconnect(pCtx->u32ClientID);
912	pCtx->u32ClientID = 0;
913
914	LogFlowFuncLeaveRC(VINF_SUCCESS);
915	return VINF_SUCCESS;
916	}
917
918	DECLCALLBACK(void) VBoxClipboardDestroy(void *pInstance)
919	{
920	AssertPtrReturnVoid(pInstance);
921
922	PVBOXCLIPBOARDCONTEXT pCtx = (PVBOXCLIPBOARDCONTEXT)pInstance;
923	AssertPtr(pCtx);
924
925	/* Make sure that we are disconnected. */
926	Assert(pCtx->u32ClientID == 0);
927
928	vboxClipboardDestroy(pCtx);
929	RT_BZERO(pCtx, sizeof(VBOXCLIPBOARDCONTEXT));
930
931	return;
932	}
933
934	/**
935	* The service description.
936	*/
937	VBOXSERVICEDESC g_SvcDescClipboard =
938	{
939	/* pszName. */
940	"clipboard",
941	/* pszDescription. */
942	"Shared Clipboard",
943	/* methods */
944	VBoxClipboardInit,
945	VBoxClipboardWorker,
946	VBoxClipboardStop,
947	VBoxClipboardDestroy
948	};

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxClipboard.cpp@ 69361

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