1 |
/* -*- c-basic-offset: 8 -*- |
2 |
rdesktop: A Remote Desktop Protocol client. |
3 |
Seamless windows - Remote server hook DLL |
4 |
|
5 |
Based on code copyright (C) 2004-2005 Martin Wickett |
6 |
|
7 |
Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006 |
8 |
Copyright (C) Pierre Ossman <ossman@cendio.se> 2006 |
9 |
|
10 |
This program is free software; you can redistribute it and/or modify |
11 |
it under the terms of the GNU General Public License as published by |
12 |
the Free Software Foundation; either version 2 of the License, or |
13 |
(at your option) any later version. |
14 |
|
15 |
This program is distributed in the hope that it will be useful, |
16 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 |
GNU General Public License for more details. |
19 |
|
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You should have received a copy of the GNU General Public License |
21 |
along with this program; if not, write to the Free Software |
22 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
23 |
*/ |
24 |
|
25 |
#include <stdio.h> |
26 |
#include <stdarg.h> |
27 |
|
28 |
#include <windows.h> |
29 |
#include <winuser.h> |
30 |
|
31 |
#include "../vchannel.h" |
32 |
|
33 |
#define DLL_EXPORT __declspec(dllexport) |
34 |
|
35 |
#ifdef __GNUC__ |
36 |
#define SHARED __attribute__((section ("SHAREDDATA"), shared)) |
37 |
#else |
38 |
#define SHARED |
39 |
#endif |
40 |
|
41 |
// Shared DATA |
42 |
#pragma data_seg ( "SHAREDDATA" ) |
43 |
|
44 |
// this is the total number of processes this dll is currently attached to |
45 |
int g_instance_count SHARED = 0; |
46 |
|
47 |
// blocks for locally generated events |
48 |
HWND g_block_move_hwnd SHARED = NULL; |
49 |
unsigned int g_block_move_serial SHARED = 0; |
50 |
RECT g_block_move SHARED = { 0, 0, 0, 0 }; |
51 |
|
52 |
unsigned int g_blocked_zchange_serial SHARED = 0; |
53 |
HWND g_blocked_zchange[2] SHARED = { NULL, NULL }; |
54 |
|
55 |
unsigned int g_blocked_focus_serial SHARED = 0; |
56 |
HWND g_blocked_focus SHARED = NULL; |
57 |
|
58 |
unsigned int g_blocked_state_serial SHARED = 0; |
59 |
HWND g_blocked_state_hwnd SHARED = NULL; |
60 |
int g_blocked_state SHARED = -1; |
61 |
|
62 |
#pragma data_seg () |
63 |
|
64 |
#pragma comment(linker, "/section:SHAREDDATA,rws") |
65 |
|
66 |
#define FOCUS_MSG_NAME "WM_SEAMLESS_FOCUS" |
67 |
static UINT g_wm_seamless_focus; |
68 |
|
69 |
static HHOOK g_cbt_hook = NULL; |
70 |
static HHOOK g_wndproc_hook = NULL; |
71 |
static HHOOK g_wndprocret_hook = NULL; |
72 |
|
73 |
static HINSTANCE g_instance = NULL; |
74 |
|
75 |
static HANDLE g_mutex = NULL; |
76 |
|
77 |
static void |
78 |
update_position(HWND hwnd) |
79 |
{ |
80 |
RECT rect, blocked; |
81 |
HWND blocked_hwnd; |
82 |
unsigned int serial; |
83 |
|
84 |
WaitForSingleObject(g_mutex, INFINITE); |
85 |
blocked_hwnd = g_block_move_hwnd; |
86 |
serial = g_block_move_serial; |
87 |
memcpy(&blocked, &g_block_move, sizeof(RECT)); |
88 |
ReleaseMutex(g_mutex); |
89 |
|
90 |
vchannel_block(); |
91 |
|
92 |
if (!GetWindowRect(hwnd, &rect)) |
93 |
{ |
94 |
debug("GetWindowRect failed!\n"); |
95 |
goto end; |
96 |
} |
97 |
|
98 |
if ((hwnd == blocked_hwnd) && (rect.left == blocked.left) && (rect.top == blocked.top) |
99 |
&& (rect.right == blocked.right) && (rect.bottom == blocked.bottom)) |
100 |
goto end; |
101 |
|
102 |
vchannel_write("POSITION", "0x%08lx,%d,%d,%d,%d,0x%08x", |
103 |
hwnd, |
104 |
rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0); |
105 |
|
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end: |
107 |
vchannel_unblock(); |
108 |
} |
109 |
|
110 |
static void |
111 |
update_zorder(HWND hwnd) |
112 |
{ |
113 |
HWND behind; |
114 |
HWND block_hwnd, block_behind; |
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unsigned int serial; |
116 |
|
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WaitForSingleObject(g_mutex, INFINITE); |
118 |
serial = g_blocked_zchange_serial; |
119 |
block_hwnd = g_blocked_zchange[0]; |
120 |
block_behind = g_blocked_zchange[1]; |
121 |
ReleaseMutex(g_mutex); |
122 |
|
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vchannel_block(); |
124 |
|
125 |
behind = GetNextWindow(hwnd, GW_HWNDPREV); |
126 |
while (behind) |
127 |
{ |
128 |
LONG style; |
129 |
|
130 |
style = GetWindowLong(behind, GWL_STYLE); |
131 |
|
132 |
if ((!(style & WS_CHILD) || (style & WS_POPUP)) && (style & WS_VISIBLE)) |
133 |
break; |
134 |
|
135 |
behind = GetNextWindow(behind, GW_HWNDPREV); |
136 |
} |
137 |
|
138 |
if ((hwnd == block_hwnd) && (behind == block_behind)) |
139 |
vchannel_write("ACK", "%u", serial); |
140 |
else |
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vchannel_write("ZCHANGE", "0x%08lx,0x%08lx,0x%08x", hwnd, behind, 0); |
142 |
|
143 |
vchannel_unblock(); |
144 |
} |
145 |
|
146 |
static HWND |
147 |
get_parent(HWND hwnd) |
148 |
{ |
149 |
LONG style; |
150 |
HWND parent; |
151 |
|
152 |
style = GetWindowLong(hwnd, GWL_STYLE); |
153 |
|
154 |
if (style & (WS_POPUP | DS_MODALFRAME)) |
155 |
{ |
156 |
parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT); |
157 |
|
158 |
if (parent) |
159 |
{ |
160 |
style = GetWindowLong(parent, GWL_STYLE); |
161 |
if (((style & WS_CHILD) && !(style & WS_POPUP)) || !(style & WS_VISIBLE)) |
162 |
parent = NULL; |
163 |
} |
164 |
|
165 |
if (!parent) |
166 |
parent = GetWindow(hwnd, GW_OWNER); |
167 |
|
168 |
if (parent) |
169 |
{ |
170 |
style = GetWindowLong(parent, GWL_STYLE); |
171 |
if (((style & WS_CHILD) && !(style & WS_POPUP)) || !(style & WS_VISIBLE)) |
172 |
parent = NULL; |
173 |
} |
174 |
|
175 |
if (!parent) |
176 |
parent = (HWND) - 1; |
177 |
} |
178 |
else |
179 |
parent = NULL; |
180 |
|
181 |
return parent; |
182 |
} |
183 |
|
184 |
static LRESULT CALLBACK |
185 |
wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
186 |
{ |
187 |
HWND hwnd, parent; |
188 |
UINT msg; |
189 |
WPARAM wparam; |
190 |
LPARAM lparam; |
191 |
|
192 |
LONG style; |
193 |
|
194 |
if (code < 0) |
195 |
goto end; |
196 |
|
197 |
hwnd = ((CWPSTRUCT *) details)->hwnd; |
198 |
msg = ((CWPSTRUCT *) details)->message; |
199 |
wparam = ((CWPSTRUCT *) details)->wParam; |
200 |
lparam = ((CWPSTRUCT *) details)->lParam; |
201 |
|
202 |
style = GetWindowLong(hwnd, GWL_STYLE); |
203 |
|
204 |
/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
205 |
but they exist nonetheless. */ |
206 |
if ((style & WS_CHILD) && !(style & WS_POPUP)) |
207 |
goto end; |
208 |
|
209 |
parent = get_parent(hwnd); |
210 |
|
211 |
switch (msg) |
212 |
{ |
213 |
case WM_WINDOWPOSCHANGED: |
214 |
{ |
215 |
WINDOWPOS *wp = (WINDOWPOS *) lparam; |
216 |
|
217 |
if (wp->flags & SWP_SHOWWINDOW) |
218 |
{ |
219 |
unsigned short title[150]; |
220 |
int state; |
221 |
DWORD pid; |
222 |
int flags; |
223 |
|
224 |
GetWindowThreadProcessId(hwnd, &pid); |
225 |
|
226 |
flags = 0; |
227 |
if (style & DS_MODALFRAME) |
228 |
flags |= SEAMLESS_CREATE_MODAL; |
229 |
|
230 |
vchannel_write("CREATE", "0x%08lx,0x%08lx,0x%08lx,0x%08x", |
231 |
(long) hwnd, (long) pid, (long) parent, |
232 |
flags); |
233 |
|
234 |
GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title)); |
235 |
|
236 |
vchannel_write("TITLE", "0x%08lx,%s,0x%08x", hwnd, |
237 |
vchannel_strfilter_unicode(title), 0); |
238 |
|
239 |
if (style & WS_MAXIMIZE) |
240 |
state = 2; |
241 |
else if (style & WS_MINIMIZE) |
242 |
state = 1; |
243 |
else |
244 |
state = 0; |
245 |
|
246 |
update_position(hwnd); |
247 |
|
248 |
vchannel_write("STATE", "0x%08lx,0x%08x,0x%08x", hwnd, |
249 |
state, 0); |
250 |
} |
251 |
|
252 |
if (wp->flags & SWP_HIDEWINDOW) |
253 |
vchannel_write("DESTROY", "0x%08lx,0x%08x", hwnd, 0); |
254 |
|
255 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
256 |
break; |
257 |
|
258 |
if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE)) |
259 |
update_position(hwnd); |
260 |
|
261 |
break; |
262 |
} |
263 |
|
264 |
case WM_SIZE: |
265 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
266 |
break; |
267 |
update_position(hwnd); |
268 |
break; |
269 |
|
270 |
case WM_MOVE: |
271 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
272 |
break; |
273 |
update_position(hwnd); |
274 |
break; |
275 |
|
276 |
case WM_DESTROY: |
277 |
if (!(style & WS_VISIBLE)) |
278 |
break; |
279 |
vchannel_write("DESTROY", "0x%08lx,0x%08x", hwnd, 0); |
280 |
break; |
281 |
|
282 |
default: |
283 |
break; |
284 |
} |
285 |
|
286 |
end: |
287 |
return CallNextHookEx(g_wndproc_hook, code, cur_thread, details); |
288 |
} |
289 |
|
290 |
static LRESULT CALLBACK |
291 |
wndprocret_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
292 |
{ |
293 |
HWND hwnd, parent; |
294 |
UINT msg; |
295 |
WPARAM wparam; |
296 |
LPARAM lparam; |
297 |
|
298 |
LONG style; |
299 |
|
300 |
if (code < 0) |
301 |
goto end; |
302 |
|
303 |
hwnd = ((CWPRETSTRUCT *) details)->hwnd; |
304 |
msg = ((CWPRETSTRUCT *) details)->message; |
305 |
wparam = ((CWPRETSTRUCT *) details)->wParam; |
306 |
lparam = ((CWPRETSTRUCT *) details)->lParam; |
307 |
|
308 |
style = GetWindowLong(hwnd, GWL_STYLE); |
309 |
|
310 |
/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
311 |
but they exist nonetheless. */ |
312 |
if ((style & WS_CHILD) && !(style & WS_POPUP)) |
313 |
goto end; |
314 |
|
315 |
parent = get_parent(hwnd); |
316 |
|
317 |
switch (msg) |
318 |
{ |
319 |
case WM_WINDOWPOSCHANGED: |
320 |
{ |
321 |
WINDOWPOS *wp = (WINDOWPOS *) lparam; |
322 |
|
323 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
324 |
break; |
325 |
|
326 |
if (!(wp->flags & SWP_NOZORDER)) |
327 |
update_zorder(hwnd); |
328 |
|
329 |
break; |
330 |
} |
331 |
|
332 |
|
333 |
case WM_SETTEXT: |
334 |
{ |
335 |
unsigned short title[150]; |
336 |
if (!(style & WS_VISIBLE)) |
337 |
break; |
338 |
/* We cannot use the string in lparam because |
339 |
we need unicode. */ |
340 |
GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title)); |
341 |
vchannel_write("TITLE", "0x%08lx,%s,0x%08x", hwnd, |
342 |
vchannel_strfilter_unicode(title), 0); |
343 |
break; |
344 |
} |
345 |
|
346 |
default: |
347 |
break; |
348 |
} |
349 |
|
350 |
if (msg == g_wm_seamless_focus) |
351 |
{ |
352 |
/* FIXME: SetForegroundWindow() kills menus. Need to find a |
353 |
clean way to solve this. */ |
354 |
if ((GetForegroundWindow() != hwnd) && !parent) |
355 |
SetForegroundWindow(hwnd); |
356 |
|
357 |
vchannel_write("ACK", "%u", g_blocked_focus_serial); |
358 |
} |
359 |
|
360 |
end: |
361 |
return CallNextHookEx(g_wndprocret_hook, code, cur_thread, details); |
362 |
} |
363 |
|
364 |
static LRESULT CALLBACK |
365 |
cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam) |
366 |
{ |
367 |
if (code < 0) |
368 |
goto end; |
369 |
|
370 |
switch (code) |
371 |
{ |
372 |
case HCBT_MINMAX: |
373 |
{ |
374 |
int show, state, blocked; |
375 |
HWND blocked_hwnd; |
376 |
unsigned int serial; |
377 |
|
378 |
WaitForSingleObject(g_mutex, INFINITE); |
379 |
blocked_hwnd = g_blocked_state_hwnd; |
380 |
serial = g_blocked_state_serial; |
381 |
blocked = g_blocked_state; |
382 |
ReleaseMutex(g_mutex); |
383 |
|
384 |
show = LOWORD(lparam); |
385 |
|
386 |
if ((show == SW_NORMAL) || (show == SW_SHOWNORMAL) |
387 |
|| (show == SW_RESTORE)) |
388 |
state = 0; |
389 |
else if ((show == SW_MINIMIZE) || (show == SW_SHOWMINIMIZED)) |
390 |
state = 1; |
391 |
else if ((show == SW_MAXIMIZE) || (show == SW_SHOWMAXIMIZED)) |
392 |
state = 2; |
393 |
else |
394 |
{ |
395 |
debug("Unexpected show: %d", show); |
396 |
break; |
397 |
} |
398 |
|
399 |
if ((blocked_hwnd == (HWND) wparam) && (blocked == state)) |
400 |
vchannel_write("ACK", "%u", serial); |
401 |
else |
402 |
vchannel_write("STATE", "0x%08lx,0x%08x,0x%08x", |
403 |
(HWND) wparam, state, 0); |
404 |
|
405 |
break; |
406 |
} |
407 |
|
408 |
default: |
409 |
break; |
410 |
} |
411 |
|
412 |
end: |
413 |
return CallNextHookEx(g_cbt_hook, code, wparam, lparam); |
414 |
} |
415 |
|
416 |
DLL_EXPORT void |
417 |
SetHooks(void) |
418 |
{ |
419 |
if (!g_cbt_hook) |
420 |
g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0); |
421 |
|
422 |
if (!g_wndproc_hook) |
423 |
g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0); |
424 |
|
425 |
if (!g_wndprocret_hook) |
426 |
g_wndprocret_hook = |
427 |
SetWindowsHookEx(WH_CALLWNDPROCRET, wndprocret_hook_proc, g_instance, 0); |
428 |
} |
429 |
|
430 |
DLL_EXPORT void |
431 |
RemoveHooks(void) |
432 |
{ |
433 |
if (g_cbt_hook) |
434 |
UnhookWindowsHookEx(g_cbt_hook); |
435 |
|
436 |
if (g_wndproc_hook) |
437 |
UnhookWindowsHookEx(g_wndproc_hook); |
438 |
|
439 |
if (g_wndprocret_hook) |
440 |
UnhookWindowsHookEx(g_wndprocret_hook); |
441 |
} |
442 |
|
443 |
DLL_EXPORT void |
444 |
SafeMoveWindow(unsigned int serial, HWND hwnd, int x, int y, int width, int height) |
445 |
{ |
446 |
RECT rect; |
447 |
|
448 |
WaitForSingleObject(g_mutex, INFINITE); |
449 |
g_block_move_hwnd = hwnd; |
450 |
g_block_move_serial = serial; |
451 |
g_block_move.left = x; |
452 |
g_block_move.top = y; |
453 |
g_block_move.right = x + width; |
454 |
g_block_move.bottom = y + height; |
455 |
ReleaseMutex(g_mutex); |
456 |
|
457 |
SetWindowPos(hwnd, NULL, x, y, width, height, SWP_NOACTIVATE | SWP_NOZORDER); |
458 |
|
459 |
vchannel_write("ACK", "%u", serial); |
460 |
|
461 |
if (!GetWindowRect(hwnd, &rect)) |
462 |
debug("GetWindowRect failed!\n"); |
463 |
else if ((rect.left != x) || (rect.top != y) || (rect.right != x + width) |
464 |
|| (rect.bottom != y + height)) |
465 |
update_position(hwnd); |
466 |
|
467 |
WaitForSingleObject(g_mutex, INFINITE); |
468 |
g_block_move_hwnd = NULL; |
469 |
memset(&g_block_move, 0, sizeof(RECT)); |
470 |
ReleaseMutex(g_mutex); |
471 |
} |
472 |
|
473 |
DLL_EXPORT void |
474 |
SafeZChange(unsigned int serial, HWND hwnd, HWND behind) |
475 |
{ |
476 |
WaitForSingleObject(g_mutex, INFINITE); |
477 |
g_blocked_zchange_serial = serial; |
478 |
g_blocked_zchange[0] = hwnd; |
479 |
g_blocked_zchange[1] = behind; |
480 |
ReleaseMutex(g_mutex); |
481 |
|
482 |
if (behind == NULL) |
483 |
behind = HWND_TOP; |
484 |
|
485 |
SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE); |
486 |
|
487 |
WaitForSingleObject(g_mutex, INFINITE); |
488 |
g_blocked_zchange[0] = NULL; |
489 |
g_blocked_zchange[1] = NULL; |
490 |
ReleaseMutex(g_mutex); |
491 |
} |
492 |
|
493 |
DLL_EXPORT void |
494 |
SafeFocus(unsigned int serial, HWND hwnd) |
495 |
{ |
496 |
WaitForSingleObject(g_mutex, INFINITE); |
497 |
g_blocked_focus_serial = serial; |
498 |
g_blocked_focus = hwnd; |
499 |
ReleaseMutex(g_mutex); |
500 |
|
501 |
SendMessage(hwnd, g_wm_seamless_focus, 0, 0); |
502 |
|
503 |
WaitForSingleObject(g_mutex, INFINITE); |
504 |
g_blocked_focus = NULL; |
505 |
ReleaseMutex(g_mutex); |
506 |
} |
507 |
|
508 |
DLL_EXPORT void |
509 |
SafeSetState(unsigned int serial, HWND hwnd, int state) |
510 |
{ |
511 |
LONG style; |
512 |
int curstate; |
513 |
|
514 |
vchannel_block(); |
515 |
|
516 |
style = GetWindowLong(hwnd, GWL_STYLE); |
517 |
|
518 |
if (style & WS_MAXIMIZE) |
519 |
curstate = 2; |
520 |
else if (style & WS_MINIMIZE) |
521 |
curstate = 1; |
522 |
else |
523 |
curstate = 0; |
524 |
|
525 |
if (state == curstate) |
526 |
{ |
527 |
vchannel_write("ACK", "%u", serial); |
528 |
vchannel_unblock(); |
529 |
return; |
530 |
} |
531 |
|
532 |
WaitForSingleObject(g_mutex, INFINITE); |
533 |
g_blocked_state_hwnd = hwnd; |
534 |
g_blocked_state_serial = serial; |
535 |
g_blocked_state = state; |
536 |
ReleaseMutex(g_mutex); |
537 |
|
538 |
vchannel_unblock(); |
539 |
|
540 |
if (state == 0) |
541 |
ShowWindow(hwnd, SW_RESTORE); |
542 |
else if (state == 1) |
543 |
ShowWindow(hwnd, SW_MINIMIZE); |
544 |
else if (state == 2) |
545 |
ShowWindow(hwnd, SW_MAXIMIZE); |
546 |
else |
547 |
debug("Invalid state %d sent.", state); |
548 |
|
549 |
WaitForSingleObject(g_mutex, INFINITE); |
550 |
g_blocked_state_hwnd = NULL; |
551 |
g_blocked_state = -1; |
552 |
ReleaseMutex(g_mutex); |
553 |
} |
554 |
|
555 |
DLL_EXPORT int |
556 |
GetInstanceCount() |
557 |
{ |
558 |
return g_instance_count; |
559 |
} |
560 |
|
561 |
BOOL APIENTRY |
562 |
DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved) |
563 |
{ |
564 |
switch (ul_reason_for_call) |
565 |
{ |
566 |
case DLL_PROCESS_ATTACH: |
567 |
// remember our instance handle |
568 |
g_instance = hinstDLL; |
569 |
|
570 |
g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL"); |
571 |
if (!g_mutex) |
572 |
return FALSE; |
573 |
|
574 |
WaitForSingleObject(g_mutex, INFINITE); |
575 |
++g_instance_count; |
576 |
ReleaseMutex(g_mutex); |
577 |
|
578 |
g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME); |
579 |
|
580 |
vchannel_open(); |
581 |
|
582 |
break; |
583 |
|
584 |
case DLL_THREAD_ATTACH: |
585 |
break; |
586 |
|
587 |
case DLL_THREAD_DETACH: |
588 |
break; |
589 |
|
590 |
case DLL_PROCESS_DETACH: |
591 |
WaitForSingleObject(g_mutex, INFINITE); |
592 |
--g_instance_count; |
593 |
ReleaseMutex(g_mutex); |
594 |
|
595 |
vchannel_close(); |
596 |
|
597 |
CloseHandle(g_mutex); |
598 |
|
599 |
break; |
600 |
} |
601 |
|
602 |
return TRUE; |
603 |
} |