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. |
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|
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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; |
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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 |
if (!GetWindowRect(hwnd, &rect)) |
85 |
{ |
86 |
debug("GetWindowRect failed!\n"); |
87 |
return; |
88 |
} |
89 |
|
90 |
WaitForSingleObject(g_mutex, INFINITE); |
91 |
blocked_hwnd = g_block_move_hwnd; |
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serial = g_block_move_serial; |
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memcpy(&blocked, &g_block_move, sizeof(RECT)); |
94 |
ReleaseMutex(g_mutex); |
95 |
|
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if ((hwnd == blocked_hwnd) && (rect.left == blocked.left) && (rect.top == blocked.top) |
97 |
&& (rect.right == blocked.right) && (rect.bottom == blocked.bottom)) |
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vchannel_write("ACK", "%u", serial); |
99 |
else |
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vchannel_write("POSITION", "0x%p,%d,%d,%d,%d,0x%x", |
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hwnd, |
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rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, |
103 |
0); |
104 |
} |
105 |
|
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static void |
107 |
update_zorder(HWND hwnd) |
108 |
{ |
109 |
HWND behind; |
110 |
HWND block_hwnd, block_behind; |
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unsigned int serial; |
112 |
|
113 |
WaitForSingleObject(g_mutex, INFINITE); |
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serial = g_blocked_zchange_serial; |
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block_hwnd = g_blocked_zchange[0]; |
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block_behind = g_blocked_zchange[1]; |
117 |
ReleaseMutex(g_mutex); |
118 |
|
119 |
behind = GetNextWindow(hwnd, GW_HWNDPREV); |
120 |
while (behind) |
121 |
{ |
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LONG style; |
123 |
|
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style = GetWindowLong(behind, GWL_STYLE); |
125 |
|
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if ((!(style & WS_CHILD) || (style & WS_POPUP)) && (style & WS_VISIBLE)) |
127 |
break; |
128 |
|
129 |
behind = GetNextWindow(behind, GW_HWNDPREV); |
130 |
} |
131 |
|
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if ((hwnd == block_hwnd) && (behind == block_behind)) |
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vchannel_write("ACK", "%u", serial); |
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else |
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vchannel_write("ZCHANGE", "0x%p,0x%p,0x%x", hwnd, behind, 0); |
136 |
} |
137 |
|
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static LRESULT CALLBACK |
139 |
wndproc_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
140 |
{ |
141 |
HWND hwnd, parent; |
142 |
UINT msg; |
143 |
WPARAM wparam; |
144 |
LPARAM lparam; |
145 |
|
146 |
LONG style; |
147 |
|
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if (code < 0) |
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goto end; |
150 |
|
151 |
hwnd = ((CWPSTRUCT *) details)->hwnd; |
152 |
msg = ((CWPSTRUCT *) details)->message; |
153 |
wparam = ((CWPSTRUCT *) details)->wParam; |
154 |
lparam = ((CWPSTRUCT *) details)->lParam; |
155 |
|
156 |
style = GetWindowLong(hwnd, GWL_STYLE); |
157 |
|
158 |
/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
159 |
but they exist nonetheless. */ |
160 |
if ((style & WS_CHILD) && !(style & WS_POPUP)) |
161 |
goto end; |
162 |
|
163 |
if (style & WS_POPUP) |
164 |
{ |
165 |
parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT); |
166 |
if (!parent) |
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parent = (HWND) - 1; |
168 |
} |
169 |
else |
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parent = NULL; |
171 |
|
172 |
switch (msg) |
173 |
{ |
174 |
case WM_WINDOWPOSCHANGED: |
175 |
{ |
176 |
WINDOWPOS *wp = (WINDOWPOS *) lparam; |
177 |
|
178 |
if (wp->flags & SWP_SHOWWINDOW) |
179 |
{ |
180 |
unsigned short title[150]; |
181 |
int state; |
182 |
|
183 |
vchannel_write("CREATE", "0x%p,0x%p,0x%x", hwnd, parent, 0); |
184 |
|
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GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title)); |
186 |
|
187 |
vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd, |
188 |
vchannel_strfilter_unicode(title), 0); |
189 |
|
190 |
if (style & WS_MAXIMIZE) |
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state = 2; |
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else if (style & WS_MINIMIZE) |
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state = 1; |
194 |
else |
195 |
state = 0; |
196 |
|
197 |
update_position(hwnd); |
198 |
|
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vchannel_write("STATE", "0x%p,0x%x,0x%x", hwnd, state, 0); |
200 |
} |
201 |
|
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if (wp->flags & SWP_HIDEWINDOW) |
203 |
vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0); |
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|
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if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
206 |
break; |
207 |
|
208 |
if (!(wp->flags & SWP_NOMOVE && wp->flags & SWP_NOSIZE)) |
209 |
update_position(hwnd); |
210 |
|
211 |
break; |
212 |
} |
213 |
|
214 |
case WM_SIZE: |
215 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
216 |
break; |
217 |
update_position(hwnd); |
218 |
break; |
219 |
|
220 |
case WM_MOVE: |
221 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
222 |
break; |
223 |
update_position(hwnd); |
224 |
break; |
225 |
|
226 |
case WM_DESTROY: |
227 |
if (!(style & WS_VISIBLE)) |
228 |
break; |
229 |
vchannel_write("DESTROY", "0x%p,0x%x", hwnd, 0); |
230 |
break; |
231 |
|
232 |
default: |
233 |
break; |
234 |
} |
235 |
|
236 |
end: |
237 |
return CallNextHookEx(g_wndproc_hook, code, cur_thread, details); |
238 |
} |
239 |
|
240 |
static LRESULT CALLBACK |
241 |
wndprocret_hook_proc(int code, WPARAM cur_thread, LPARAM details) |
242 |
{ |
243 |
HWND hwnd, parent; |
244 |
UINT msg; |
245 |
WPARAM wparam; |
246 |
LPARAM lparam; |
247 |
|
248 |
LONG style; |
249 |
|
250 |
if (code < 0) |
251 |
goto end; |
252 |
|
253 |
hwnd = ((CWPRETSTRUCT *) details)->hwnd; |
254 |
msg = ((CWPRETSTRUCT *) details)->message; |
255 |
wparam = ((CWPRETSTRUCT *) details)->wParam; |
256 |
lparam = ((CWPRETSTRUCT *) details)->lParam; |
257 |
|
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style = GetWindowLong(hwnd, GWL_STYLE); |
259 |
|
260 |
/* Docs say that WS_CHILD and WS_POPUP is an illegal combination, |
261 |
but they exist nonetheless. */ |
262 |
if ((style & WS_CHILD) && !(style & WS_POPUP)) |
263 |
goto end; |
264 |
|
265 |
if (style & WS_POPUP) |
266 |
{ |
267 |
parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT); |
268 |
if (!parent) |
269 |
parent = (HWND) - 1; |
270 |
} |
271 |
else |
272 |
parent = NULL; |
273 |
|
274 |
switch (msg) |
275 |
{ |
276 |
case WM_WINDOWPOSCHANGED: |
277 |
{ |
278 |
WINDOWPOS *wp = (WINDOWPOS *) lparam; |
279 |
|
280 |
if (!(style & WS_VISIBLE) || (style & WS_MINIMIZE)) |
281 |
break; |
282 |
|
283 |
if (!(wp->flags & SWP_NOZORDER)) |
284 |
update_zorder(hwnd); |
285 |
|
286 |
break; |
287 |
} |
288 |
|
289 |
|
290 |
case WM_SETTEXT: |
291 |
{ |
292 |
unsigned short title[150]; |
293 |
if (!(style & WS_VISIBLE)) |
294 |
break; |
295 |
/* We cannot use the string in lparam because |
296 |
we need unicode. */ |
297 |
GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title)); |
298 |
vchannel_write("TITLE", "0x%p,%s,0x%x", hwnd, |
299 |
vchannel_strfilter_unicode(title), 0); |
300 |
break; |
301 |
} |
302 |
|
303 |
default: |
304 |
break; |
305 |
} |
306 |
|
307 |
if (msg == g_wm_seamless_focus) |
308 |
{ |
309 |
/* FIXME: SetActiveWindow() kills menus. Need to find a clean |
310 |
way to solve this. */ |
311 |
if ((GetActiveWindow() != hwnd) && !parent) |
312 |
SetActiveWindow(hwnd); |
313 |
|
314 |
vchannel_write("ACK", "%u", g_blocked_focus_serial); |
315 |
} |
316 |
|
317 |
end: |
318 |
return CallNextHookEx(g_wndprocret_hook, code, cur_thread, details); |
319 |
} |
320 |
|
321 |
static LRESULT CALLBACK |
322 |
cbt_hook_proc(int code, WPARAM wparam, LPARAM lparam) |
323 |
{ |
324 |
if (code < 0) |
325 |
goto end; |
326 |
|
327 |
switch (code) |
328 |
{ |
329 |
case HCBT_MINMAX: |
330 |
{ |
331 |
int show, state, blocked; |
332 |
HWND blocked_hwnd; |
333 |
unsigned int serial; |
334 |
|
335 |
WaitForSingleObject(g_mutex, INFINITE); |
336 |
blocked_hwnd = g_blocked_state_hwnd; |
337 |
serial = g_blocked_state_serial; |
338 |
blocked = g_blocked_state; |
339 |
ReleaseMutex(g_mutex); |
340 |
|
341 |
show = LOWORD(lparam); |
342 |
|
343 |
if ((show == SW_NORMAL) || (show == SW_SHOWNORMAL) |
344 |
|| (show == SW_RESTORE)) |
345 |
state = 0; |
346 |
else if ((show == SW_MINIMIZE) || (show == SW_SHOWMINIMIZED)) |
347 |
state = 1; |
348 |
else if ((show == SW_MAXIMIZE) || (show == SW_SHOWMAXIMIZED)) |
349 |
state = 2; |
350 |
else |
351 |
{ |
352 |
debug("Unexpected show: %d", show); |
353 |
break; |
354 |
} |
355 |
|
356 |
if ((blocked_hwnd == (HWND) wparam) && (blocked == state)) |
357 |
vchannel_write("ACK", "%u", serial); |
358 |
else |
359 |
vchannel_write("STATE", "0x%p,0x%x,0x%x", (HWND) wparam, |
360 |
state, 0); |
361 |
|
362 |
break; |
363 |
} |
364 |
|
365 |
default: |
366 |
break; |
367 |
} |
368 |
|
369 |
end: |
370 |
return CallNextHookEx(g_cbt_hook, code, wparam, lparam); |
371 |
} |
372 |
|
373 |
DLL_EXPORT void |
374 |
SetHooks(void) |
375 |
{ |
376 |
if (!g_cbt_hook) |
377 |
g_cbt_hook = SetWindowsHookEx(WH_CBT, cbt_hook_proc, g_instance, 0); |
378 |
|
379 |
if (!g_wndproc_hook) |
380 |
g_wndproc_hook = SetWindowsHookEx(WH_CALLWNDPROC, wndproc_hook_proc, g_instance, 0); |
381 |
|
382 |
if (!g_wndprocret_hook) |
383 |
g_wndprocret_hook = |
384 |
SetWindowsHookEx(WH_CALLWNDPROCRET, wndprocret_hook_proc, g_instance, 0); |
385 |
} |
386 |
|
387 |
DLL_EXPORT void |
388 |
RemoveHooks(void) |
389 |
{ |
390 |
if (g_cbt_hook) |
391 |
UnhookWindowsHookEx(g_cbt_hook); |
392 |
|
393 |
if (g_wndproc_hook) |
394 |
UnhookWindowsHookEx(g_wndproc_hook); |
395 |
|
396 |
if (g_wndprocret_hook) |
397 |
UnhookWindowsHookEx(g_wndprocret_hook); |
398 |
} |
399 |
|
400 |
DLL_EXPORT void |
401 |
SafeMoveWindow(unsigned int serial, HWND hwnd, int x, int y, int width, int height) |
402 |
{ |
403 |
RECT rect; |
404 |
|
405 |
vchannel_block(); |
406 |
|
407 |
if (!GetWindowRect(hwnd, &rect)) |
408 |
{ |
409 |
vchannel_unblock(); |
410 |
debug("GetWindowRect failed!\n"); |
411 |
return; |
412 |
} |
413 |
|
414 |
if ((rect.left == x) && (rect.top == y) && (rect.right == x + width) |
415 |
&& (rect.bottom == y + height)) |
416 |
{ |
417 |
vchannel_write("ACK", "%u", serial); |
418 |
vchannel_unblock(); |
419 |
} |
420 |
|
421 |
WaitForSingleObject(g_mutex, INFINITE); |
422 |
g_block_move_hwnd = hwnd; |
423 |
g_block_move_serial = serial; |
424 |
g_block_move.left = x; |
425 |
g_block_move.top = y; |
426 |
g_block_move.right = x + width; |
427 |
g_block_move.bottom = y + height; |
428 |
ReleaseMutex(g_mutex); |
429 |
|
430 |
vchannel_unblock(); |
431 |
|
432 |
SetWindowPos(hwnd, NULL, x, y, width, height, SWP_NOACTIVATE | SWP_NOZORDER); |
433 |
|
434 |
WaitForSingleObject(g_mutex, INFINITE); |
435 |
g_block_move_hwnd = NULL; |
436 |
memset(&g_block_move, 0, sizeof(RECT)); |
437 |
ReleaseMutex(g_mutex); |
438 |
} |
439 |
|
440 |
DLL_EXPORT void |
441 |
SafeZChange(unsigned int serial, HWND hwnd, HWND behind) |
442 |
{ |
443 |
WaitForSingleObject(g_mutex, INFINITE); |
444 |
g_blocked_zchange_serial = serial; |
445 |
g_blocked_zchange[0] = hwnd; |
446 |
g_blocked_zchange[1] = behind; |
447 |
ReleaseMutex(g_mutex); |
448 |
|
449 |
if (behind == NULL) |
450 |
behind = HWND_TOP; |
451 |
|
452 |
SetWindowPos(hwnd, behind, 0, 0, 0, 0, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE); |
453 |
|
454 |
WaitForSingleObject(g_mutex, INFINITE); |
455 |
g_blocked_zchange[0] = NULL; |
456 |
g_blocked_zchange[1] = NULL; |
457 |
ReleaseMutex(g_mutex); |
458 |
} |
459 |
|
460 |
DLL_EXPORT void |
461 |
SafeFocus(unsigned int serial, HWND hwnd) |
462 |
{ |
463 |
WaitForSingleObject(g_mutex, INFINITE); |
464 |
g_blocked_focus_serial = serial; |
465 |
g_blocked_focus = hwnd; |
466 |
ReleaseMutex(g_mutex); |
467 |
|
468 |
SendMessage(hwnd, g_wm_seamless_focus, 0, 0); |
469 |
|
470 |
WaitForSingleObject(g_mutex, INFINITE); |
471 |
g_blocked_focus = NULL; |
472 |
ReleaseMutex(g_mutex); |
473 |
} |
474 |
|
475 |
DLL_EXPORT void |
476 |
SafeSetState(unsigned int serial, HWND hwnd, int state) |
477 |
{ |
478 |
LONG style; |
479 |
int curstate; |
480 |
|
481 |
vchannel_block(); |
482 |
|
483 |
style = GetWindowLong(hwnd, GWL_STYLE); |
484 |
|
485 |
if (style & WS_MAXIMIZE) |
486 |
curstate = 2; |
487 |
else if (style & WS_MINIMIZE) |
488 |
curstate = 1; |
489 |
else |
490 |
curstate = 0; |
491 |
|
492 |
if (state == curstate) |
493 |
{ |
494 |
vchannel_write("ACK", "%u", serial); |
495 |
vchannel_unblock(); |
496 |
} |
497 |
|
498 |
WaitForSingleObject(g_mutex, INFINITE); |
499 |
g_blocked_state_hwnd = hwnd; |
500 |
g_blocked_state_serial = serial; |
501 |
g_blocked_state = state; |
502 |
ReleaseMutex(g_mutex); |
503 |
|
504 |
vchannel_unblock(); |
505 |
|
506 |
if (state == 0) |
507 |
ShowWindow(hwnd, SW_RESTORE); |
508 |
else if (state == 1) |
509 |
ShowWindow(hwnd, SW_MINIMIZE); |
510 |
else if (state == 2) |
511 |
ShowWindow(hwnd, SW_MAXIMIZE); |
512 |
else |
513 |
debug("Invalid state %d sent.", state); |
514 |
|
515 |
WaitForSingleObject(g_mutex, INFINITE); |
516 |
g_blocked_state_hwnd = NULL; |
517 |
g_blocked_state = -1; |
518 |
ReleaseMutex(g_mutex); |
519 |
} |
520 |
|
521 |
DLL_EXPORT int |
522 |
GetInstanceCount() |
523 |
{ |
524 |
return g_instance_count; |
525 |
} |
526 |
|
527 |
BOOL APIENTRY |
528 |
DllMain(HINSTANCE hinstDLL, DWORD ul_reason_for_call, LPVOID lpReserved) |
529 |
{ |
530 |
switch (ul_reason_for_call) |
531 |
{ |
532 |
case DLL_PROCESS_ATTACH: |
533 |
// remember our instance handle |
534 |
g_instance = hinstDLL; |
535 |
|
536 |
g_mutex = CreateMutex(NULL, FALSE, "Local\\SeamlessDLL"); |
537 |
if (!g_mutex) |
538 |
return FALSE; |
539 |
|
540 |
WaitForSingleObject(g_mutex, INFINITE); |
541 |
++g_instance_count; |
542 |
ReleaseMutex(g_mutex); |
543 |
|
544 |
g_wm_seamless_focus = RegisterWindowMessage(FOCUS_MSG_NAME); |
545 |
|
546 |
vchannel_open(); |
547 |
|
548 |
break; |
549 |
|
550 |
case DLL_THREAD_ATTACH: |
551 |
break; |
552 |
|
553 |
case DLL_THREAD_DETACH: |
554 |
break; |
555 |
|
556 |
case DLL_PROCESS_DETACH: |
557 |
WaitForSingleObject(g_mutex, INFINITE); |
558 |
--g_instance_count; |
559 |
ReleaseMutex(g_mutex); |
560 |
|
561 |
vchannel_close(); |
562 |
|
563 |
CloseHandle(g_mutex); |
564 |
|
565 |
break; |
566 |
} |
567 |
|
568 |
return TRUE; |
569 |
} |