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a09e091a JB |
1 | /* |
2 | ||
3 | Copyright 1987, 1998 The Open Group | |
4 | ||
5 | Permission to use, copy, modify, distribute, and sell this software and its | |
6 | documentation for any purpose is hereby granted without fee, provided that | |
7 | the above copyright notice appear in all copies and that both that | |
8 | copyright notice and this permission notice appear in supporting | |
9 | documentation. | |
10 | ||
11 | The above copyright notice and this permission notice shall be included | |
12 | in all copies or substantial portions of the Software. | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
15 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
16 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
17 | IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
18 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
19 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
20 | OTHER DEALINGS IN THE SOFTWARE. | |
21 | ||
22 | Except as contained in this notice, the name of The Open Group shall | |
23 | not be used in advertising or otherwise to promote the sale, use or | |
24 | other dealings in this Software without prior written authorization | |
25 | from The Open Group. | |
26 | ||
27 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts, | |
28 | ||
29 | All Rights Reserved | |
30 | ||
31 | Permission to use, copy, modify, and distribute this software and its | |
32 | documentation for any purpose and without fee is hereby granted, | |
33 | provided that the above copyright notice appear in all copies and that | |
34 | both that copyright notice and this permission notice appear in | |
35 | supporting documentation, and that the name of Digital not be | |
36 | used in advertising or publicity pertaining to distribution of the | |
37 | software without specific, written prior permission. | |
38 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
39 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
40 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
41 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
42 | WHETHER IN AN action OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
43 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
44 | SOFTWARE. | |
45 | ||
46 | */ | |
47 | ||
48 | #ifdef HAVE_DIX_CONFIG_H | |
49 | #include <dix-config.h> | |
50 | #endif | |
51 | ||
52 | #include <X11/X.h> | |
53 | #include "misc.h" | |
54 | #include <X11/Xproto.h> | |
55 | #include <X11/extensions/XI2.h> | |
56 | #include "windowstr.h" | |
57 | #include "inputstr.h" | |
58 | #include "cursorstr.h" | |
59 | #include "dixgrabs.h" | |
60 | #include "xace.h" | |
61 | #include "exevents.h" | |
62 | #include "exglobals.h" | |
63 | #include "inpututils.h" | |
64 | #include "client.h" | |
65 | ||
66 | #define BITMASK(i) (((Mask)1) << ((i) & 31)) | |
67 | #define MASKIDX(i) ((i) >> 5) | |
68 | #define MASKWORD(buf, i) buf[MASKIDX(i)] | |
69 | #define BITSET(buf, i) MASKWORD(buf, i) |= BITMASK(i) | |
70 | #define BITCLEAR(buf, i) MASKWORD(buf, i) &= ~BITMASK(i) | |
71 | #define GETBIT(buf, i) (MASKWORD(buf, i) & BITMASK(i)) | |
72 | ||
73 | void | |
74 | PrintDeviceGrabInfo(DeviceIntPtr dev) | |
75 | { | |
76 | ClientPtr client; | |
77 | LocalClientCredRec *lcc; | |
78 | int i, j; | |
79 | GrabInfoPtr devGrab = &dev->deviceGrab; | |
80 | GrabPtr grab = devGrab->grab; | |
81 | Bool clientIdPrinted = FALSE; | |
82 | ||
83 | ErrorF("Active grab 0x%lx (%s) on device '%s' (%d):\n", | |
84 | (unsigned long) grab->resource, | |
85 | (grab->grabtype == XI2) ? "xi2" : | |
86 | ((grab->grabtype == CORE) ? "core" : "xi1"), dev->name, dev->id); | |
87 | ||
88 | client = clients[CLIENT_ID(grab->resource)]; | |
89 | if (client) { | |
90 | pid_t clientpid = GetClientPid(client); | |
91 | const char *cmdname = GetClientCmdName(client); | |
92 | const char *cmdargs = GetClientCmdArgs(client); | |
93 | ||
94 | if ((clientpid > 0) && (cmdname != NULL)) { | |
95 | ErrorF(" client pid %ld %s %s\n", | |
96 | (long) clientpid, cmdname, cmdargs ? cmdargs : ""); | |
97 | clientIdPrinted = TRUE; | |
98 | } | |
99 | else if (GetLocalClientCreds(client, &lcc) != -1) { | |
100 | ErrorF(" client pid %ld uid %ld gid %ld\n", | |
101 | (lcc->fieldsSet & LCC_PID_SET) ? (long) lcc->pid : 0, | |
102 | (lcc->fieldsSet & LCC_UID_SET) ? (long) lcc->euid : 0, | |
103 | (lcc->fieldsSet & LCC_GID_SET) ? (long) lcc->egid : 0); | |
104 | FreeLocalClientCreds(lcc); | |
105 | clientIdPrinted = TRUE; | |
106 | } | |
107 | } | |
108 | if (!clientIdPrinted) { | |
109 | ErrorF(" (no client information available for client %d)\n", | |
110 | CLIENT_ID(grab->resource)); | |
111 | } | |
112 | ||
113 | /* XXX is this even correct? */ | |
114 | if (devGrab->sync.other) | |
115 | ErrorF(" grab ID 0x%lx from paired device\n", | |
116 | (unsigned long) devGrab->sync.other->resource); | |
117 | ||
118 | ErrorF(" at %ld (from %s grab)%s (device %s, state %d)\n", | |
119 | (unsigned long) devGrab->grabTime.milliseconds, | |
120 | devGrab->fromPassiveGrab ? "passive" : "active", | |
121 | devGrab->implicitGrab ? " (implicit)" : "", | |
122 | devGrab->sync.frozen ? "frozen" : "thawed", devGrab->sync.state); | |
123 | ||
124 | if (grab->grabtype == CORE) { | |
125 | ErrorF(" core event mask 0x%lx\n", | |
126 | (unsigned long) grab->eventMask); | |
127 | } | |
128 | else if (grab->grabtype == XI) { | |
129 | ErrorF(" xi1 event mask 0x%lx\n", | |
130 | devGrab->implicitGrab ? (unsigned long) grab->deviceMask : | |
131 | (unsigned long) grab->eventMask); | |
132 | } | |
133 | else if (grab->grabtype == XI2) { | |
134 | for (i = 0; i < xi2mask_num_masks(grab->xi2mask); i++) { | |
135 | const unsigned char *mask; | |
136 | int print; | |
137 | ||
138 | print = 0; | |
139 | for (j = 0; j < XI2MASKSIZE; j++) { | |
140 | mask = xi2mask_get_one_mask(grab->xi2mask, i); | |
141 | if (mask[j]) { | |
142 | print = 1; | |
143 | break; | |
144 | } | |
145 | } | |
146 | if (!print) | |
147 | continue; | |
148 | ErrorF(" xi2 event mask for device %d: 0x", dev->id); | |
149 | for (j = 0; j < xi2mask_mask_size(grab->xi2mask); j++) | |
150 | ErrorF("%x", mask[j]); | |
151 | ErrorF("\n"); | |
152 | } | |
153 | } | |
154 | ||
155 | if (devGrab->fromPassiveGrab) { | |
156 | ErrorF(" passive grab type %d, detail 0x%x, " | |
157 | "activating key %d\n", grab->type, grab->detail.exact, | |
158 | devGrab->activatingKey); | |
159 | } | |
160 | ||
161 | ErrorF(" owner-events %s, kb %d ptr %d, confine %lx, cursor 0x%lx\n", | |
162 | grab->ownerEvents ? "true" : "false", | |
163 | grab->keyboardMode, grab->pointerMode, | |
164 | grab->confineTo ? (unsigned long) grab->confineTo->drawable.id : 0, | |
165 | grab->cursor ? (unsigned long) grab->cursor->id : 0); | |
166 | } | |
167 | ||
168 | void | |
169 | UngrabAllDevices(Bool kill_client) | |
170 | { | |
171 | DeviceIntPtr dev; | |
172 | ClientPtr client; | |
173 | ||
174 | ErrorF("Ungrabbing all devices%s; grabs listed below:\n", | |
175 | kill_client ? " and killing their owners" : ""); | |
176 | ||
177 | for (dev = inputInfo.devices; dev; dev = dev->next) { | |
178 | if (!dev->deviceGrab.grab) | |
179 | continue; | |
180 | PrintDeviceGrabInfo(dev); | |
181 | client = clients[CLIENT_ID(dev->deviceGrab.grab->resource)]; | |
182 | if (!kill_client || !client || client->clientGone) | |
183 | dev->deviceGrab.DeactivateGrab(dev); | |
184 | if (kill_client) | |
185 | CloseDownClient(client); | |
186 | } | |
187 | ||
188 | ErrorF("End list of ungrabbed devices\n"); | |
189 | } | |
190 | ||
191 | GrabPtr | |
192 | AllocGrab(const GrabPtr src) | |
193 | { | |
194 | GrabPtr grab = calloc(1, sizeof(GrabRec)); | |
195 | ||
196 | if (grab) { | |
197 | grab->xi2mask = xi2mask_new(); | |
198 | if (!grab->xi2mask) { | |
199 | free(grab); | |
200 | grab = NULL; | |
201 | } | |
202 | } | |
203 | ||
204 | if (src && !CopyGrab(grab, src)) { | |
205 | free(grab->xi2mask); | |
206 | free(grab); | |
207 | grab = NULL; | |
208 | } | |
209 | ||
210 | return grab; | |
211 | } | |
212 | ||
213 | GrabPtr | |
214 | CreateGrab(int client, DeviceIntPtr device, DeviceIntPtr modDevice, | |
215 | WindowPtr window, enum InputLevel grabtype, GrabMask *mask, | |
216 | GrabParameters *param, int type, | |
217 | KeyCode keybut, /* key or button */ | |
218 | WindowPtr confineTo, CursorPtr cursor) | |
219 | { | |
220 | GrabPtr grab; | |
221 | ||
222 | grab = AllocGrab(NULL); | |
223 | if (!grab) | |
224 | return (GrabPtr) NULL; | |
225 | grab->resource = FakeClientID(client); | |
226 | grab->device = device; | |
227 | grab->window = window; | |
228 | if (grabtype == CORE || grabtype == XI) | |
229 | grab->eventMask = mask->core; /* same for XI */ | |
230 | else | |
231 | grab->eventMask = 0; | |
232 | grab->deviceMask = 0; | |
233 | grab->ownerEvents = param->ownerEvents; | |
234 | grab->keyboardMode = param->this_device_mode; | |
235 | grab->pointerMode = param->other_devices_mode; | |
236 | grab->modifiersDetail.exact = param->modifiers; | |
237 | grab->modifiersDetail.pMask = NULL; | |
238 | grab->modifierDevice = modDevice; | |
239 | grab->type = type; | |
240 | grab->grabtype = grabtype; | |
241 | grab->detail.exact = keybut; | |
242 | grab->detail.pMask = NULL; | |
243 | grab->confineTo = confineTo; | |
244 | grab->cursor = RefCursor(cursor); | |
245 | grab->next = NULL; | |
246 | ||
247 | if (grabtype == XI2) | |
248 | xi2mask_merge(grab->xi2mask, mask->xi2mask); | |
249 | return grab; | |
250 | ||
251 | } | |
252 | ||
253 | void | |
254 | FreeGrab(GrabPtr pGrab) | |
255 | { | |
256 | BUG_RETURN(!pGrab); | |
257 | ||
258 | free(pGrab->modifiersDetail.pMask); | |
259 | free(pGrab->detail.pMask); | |
260 | ||
261 | if (pGrab->cursor) | |
262 | FreeCursor(pGrab->cursor, (Cursor) 0); | |
263 | ||
264 | xi2mask_free(&pGrab->xi2mask); | |
265 | free(pGrab); | |
266 | } | |
267 | ||
268 | Bool | |
269 | CopyGrab(GrabPtr dst, const GrabPtr src) | |
270 | { | |
271 | Mask *mdetails_mask = NULL; | |
272 | Mask *details_mask = NULL; | |
273 | XI2Mask *xi2mask; | |
274 | ||
275 | if (src->modifiersDetail.pMask) { | |
276 | int len = MasksPerDetailMask * sizeof(Mask); | |
277 | ||
278 | mdetails_mask = malloc(len); | |
279 | if (!mdetails_mask) | |
280 | return FALSE; | |
281 | memcpy(mdetails_mask, src->modifiersDetail.pMask, len); | |
282 | } | |
283 | ||
284 | if (src->detail.pMask) { | |
285 | int len = MasksPerDetailMask * sizeof(Mask); | |
286 | ||
287 | details_mask = malloc(len); | |
288 | if (!details_mask) { | |
289 | free(mdetails_mask); | |
290 | return FALSE; | |
291 | } | |
292 | memcpy(details_mask, src->detail.pMask, len); | |
293 | } | |
294 | ||
295 | if (!dst->xi2mask) { | |
296 | xi2mask = xi2mask_new(); | |
297 | if (!xi2mask) { | |
298 | free(mdetails_mask); | |
299 | free(details_mask); | |
300 | return FALSE; | |
301 | } | |
302 | } | |
303 | else { | |
304 | xi2mask = dst->xi2mask; | |
305 | xi2mask_zero(xi2mask, -1); | |
306 | } | |
307 | ||
308 | *dst = *src; | |
309 | dst->modifiersDetail.pMask = mdetails_mask; | |
310 | dst->detail.pMask = details_mask; | |
311 | dst->xi2mask = xi2mask; | |
312 | dst->cursor = RefCursor(src->cursor); | |
313 | ||
314 | xi2mask_merge(dst->xi2mask, src->xi2mask); | |
315 | ||
316 | return TRUE; | |
317 | } | |
318 | ||
319 | int | |
320 | DeletePassiveGrab(pointer value, XID id) | |
321 | { | |
322 | GrabPtr g, prev; | |
323 | GrabPtr pGrab = (GrabPtr) value; | |
324 | ||
325 | /* it is OK if the grab isn't found */ | |
326 | prev = 0; | |
327 | for (g = (wPassiveGrabs(pGrab->window)); g; g = g->next) { | |
328 | if (pGrab == g) { | |
329 | if (prev) | |
330 | prev->next = g->next; | |
331 | else if (!(pGrab->window->optional->passiveGrabs = g->next)) | |
332 | CheckWindowOptionalNeed(pGrab->window); | |
333 | break; | |
334 | } | |
335 | prev = g; | |
336 | } | |
337 | FreeGrab(pGrab); | |
338 | return Success; | |
339 | } | |
340 | ||
341 | static Mask * | |
342 | DeleteDetailFromMask(Mask *pDetailMask, unsigned int detail) | |
343 | { | |
344 | Mask *mask; | |
345 | int i; | |
346 | ||
347 | mask = malloc(sizeof(Mask) * MasksPerDetailMask); | |
348 | if (mask) { | |
349 | if (pDetailMask) | |
350 | for (i = 0; i < MasksPerDetailMask; i++) | |
351 | mask[i] = pDetailMask[i]; | |
352 | else | |
353 | for (i = 0; i < MasksPerDetailMask; i++) | |
354 | mask[i] = ~0L; | |
355 | BITCLEAR(mask, detail); | |
356 | } | |
357 | return mask; | |
358 | } | |
359 | ||
360 | static Bool | |
361 | IsInGrabMask(DetailRec firstDetail, | |
362 | DetailRec secondDetail, unsigned int exception) | |
363 | { | |
364 | if (firstDetail.exact == exception) { | |
365 | if (firstDetail.pMask == NULL) | |
366 | return TRUE; | |
367 | ||
368 | /* (at present) never called with two non-null pMasks */ | |
369 | if (secondDetail.exact == exception) | |
370 | return FALSE; | |
371 | ||
372 | if (GETBIT(firstDetail.pMask, secondDetail.exact)) | |
373 | return TRUE; | |
374 | } | |
375 | ||
376 | return FALSE; | |
377 | } | |
378 | ||
379 | static Bool | |
380 | IdenticalExactDetails(unsigned int firstExact, | |
381 | unsigned int secondExact, unsigned int exception) | |
382 | { | |
383 | if ((firstExact == exception) || (secondExact == exception)) | |
384 | return FALSE; | |
385 | ||
386 | if (firstExact == secondExact) | |
387 | return TRUE; | |
388 | ||
389 | return FALSE; | |
390 | } | |
391 | ||
392 | static Bool | |
393 | DetailSupersedesSecond(DetailRec firstDetail, | |
394 | DetailRec secondDetail, unsigned int exception) | |
395 | { | |
396 | if (IsInGrabMask(firstDetail, secondDetail, exception)) | |
397 | return TRUE; | |
398 | ||
399 | if (IdenticalExactDetails(firstDetail.exact, secondDetail.exact, exception)) | |
400 | return TRUE; | |
401 | ||
402 | return FALSE; | |
403 | } | |
404 | ||
405 | static Bool | |
406 | GrabSupersedesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab) | |
407 | { | |
408 | unsigned int any_modifier = (pFirstGrab->grabtype == XI2) ? | |
409 | (unsigned int) XIAnyModifier : (unsigned int) AnyModifier; | |
410 | if (!DetailSupersedesSecond(pFirstGrab->modifiersDetail, | |
411 | pSecondGrab->modifiersDetail, any_modifier)) | |
412 | return FALSE; | |
413 | ||
414 | if (DetailSupersedesSecond(pFirstGrab->detail, | |
415 | pSecondGrab->detail, (unsigned int) AnyKey)) | |
416 | return TRUE; | |
417 | ||
418 | return FALSE; | |
419 | } | |
420 | ||
421 | /** | |
422 | * Compares two grabs and returns TRUE if the first grab matches the second | |
423 | * grab. | |
424 | * | |
425 | * A match is when | |
426 | * - the devices set for the grab are equal (this is optional). | |
427 | * - the event types for both grabs are equal. | |
428 | * - XXX | |
429 | * | |
430 | * @param ignoreDevice TRUE if the device settings on the grabs are to be | |
431 | * ignored. | |
432 | * @return TRUE if the grabs match or FALSE otherwise. | |
433 | */ | |
434 | Bool | |
435 | GrabMatchesSecond(GrabPtr pFirstGrab, GrabPtr pSecondGrab, Bool ignoreDevice) | |
436 | { | |
437 | unsigned int any_modifier = (pFirstGrab->grabtype == XI2) ? | |
438 | (unsigned int) XIAnyModifier : (unsigned int) AnyModifier; | |
439 | ||
440 | if (pFirstGrab->grabtype != pSecondGrab->grabtype) | |
441 | return FALSE; | |
442 | ||
443 | if (pFirstGrab->grabtype == XI2) { | |
444 | if (pFirstGrab->device == inputInfo.all_devices || | |
445 | pSecondGrab->device == inputInfo.all_devices) { | |
446 | /* do nothing */ | |
447 | } | |
448 | else if (pFirstGrab->device == inputInfo.all_master_devices) { | |
449 | if (pSecondGrab->device != inputInfo.all_master_devices && | |
450 | !IsMaster(pSecondGrab->device)) | |
451 | return FALSE; | |
452 | } | |
453 | else if (pSecondGrab->device == inputInfo.all_master_devices) { | |
454 | if (pFirstGrab->device != inputInfo.all_master_devices && | |
455 | !IsMaster(pFirstGrab->device)) | |
456 | return FALSE; | |
457 | } | |
458 | else if (pSecondGrab->device != pFirstGrab->device) | |
459 | return FALSE; | |
460 | } | |
461 | else if (!ignoreDevice && | |
462 | ((pFirstGrab->device != pSecondGrab->device) || | |
463 | (pFirstGrab->modifierDevice != pSecondGrab->modifierDevice))) | |
464 | return FALSE; | |
465 | ||
466 | if (pFirstGrab->type != pSecondGrab->type) | |
467 | return FALSE; | |
468 | ||
469 | if (GrabSupersedesSecond(pFirstGrab, pSecondGrab) || | |
470 | GrabSupersedesSecond(pSecondGrab, pFirstGrab)) | |
471 | return TRUE; | |
472 | ||
473 | if (DetailSupersedesSecond(pSecondGrab->detail, pFirstGrab->detail, | |
474 | (unsigned int) AnyKey) | |
475 | && | |
476 | DetailSupersedesSecond(pFirstGrab->modifiersDetail, | |
477 | pSecondGrab->modifiersDetail, any_modifier)) | |
478 | return TRUE; | |
479 | ||
480 | if (DetailSupersedesSecond(pFirstGrab->detail, pSecondGrab->detail, | |
481 | (unsigned int) AnyKey) | |
482 | && | |
483 | DetailSupersedesSecond(pSecondGrab->modifiersDetail, | |
484 | pFirstGrab->modifiersDetail, any_modifier)) | |
485 | return TRUE; | |
486 | ||
487 | return FALSE; | |
488 | } | |
489 | ||
490 | static Bool | |
491 | GrabsAreIdentical(GrabPtr pFirstGrab, GrabPtr pSecondGrab) | |
492 | { | |
493 | unsigned int any_modifier = (pFirstGrab->grabtype == XI2) ? | |
494 | (unsigned int) XIAnyModifier : (unsigned int) AnyModifier; | |
495 | ||
496 | if (pFirstGrab->grabtype != pSecondGrab->grabtype) | |
497 | return FALSE; | |
498 | ||
499 | if (pFirstGrab->device != pSecondGrab->device || | |
500 | (pFirstGrab->modifierDevice != pSecondGrab->modifierDevice) || | |
501 | (pFirstGrab->type != pSecondGrab->type)) | |
502 | return FALSE; | |
503 | ||
504 | if (!(DetailSupersedesSecond(pFirstGrab->detail, | |
505 | pSecondGrab->detail, | |
506 | (unsigned int) AnyKey) && | |
507 | DetailSupersedesSecond(pSecondGrab->detail, | |
508 | pFirstGrab->detail, (unsigned int) AnyKey))) | |
509 | return FALSE; | |
510 | ||
511 | if (!(DetailSupersedesSecond(pFirstGrab->modifiersDetail, | |
512 | pSecondGrab->modifiersDetail, | |
513 | any_modifier) && | |
514 | DetailSupersedesSecond(pSecondGrab->modifiersDetail, | |
515 | pFirstGrab->modifiersDetail, any_modifier))) | |
516 | return FALSE; | |
517 | ||
518 | return TRUE; | |
519 | } | |
520 | ||
521 | /** | |
522 | * Prepend the new grab to the list of passive grabs on the window. | |
523 | * Any previously existing grab that matches the new grab will be removed. | |
524 | * Adding a new grab that would override another client's grab will result in | |
525 | * a BadAccess. | |
526 | * | |
527 | * @return Success or X error code on failure. | |
528 | */ | |
529 | int | |
530 | AddPassiveGrabToList(ClientPtr client, GrabPtr pGrab) | |
531 | { | |
532 | GrabPtr grab; | |
533 | Mask access_mode = DixGrabAccess; | |
534 | int rc; | |
535 | ||
536 | for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next) { | |
537 | if (GrabMatchesSecond(pGrab, grab, (pGrab->grabtype == CORE))) { | |
538 | if (CLIENT_BITS(pGrab->resource) != CLIENT_BITS(grab->resource)) { | |
539 | FreeGrab(pGrab); | |
540 | return BadAccess; | |
541 | } | |
542 | } | |
543 | } | |
544 | ||
545 | if (pGrab->keyboardMode == GrabModeSync || | |
546 | pGrab->pointerMode == GrabModeSync) | |
547 | access_mode |= DixFreezeAccess; | |
548 | rc = XaceHook(XACE_DEVICE_ACCESS, client, pGrab->device, access_mode); | |
549 | if (rc != Success) | |
550 | return rc; | |
551 | ||
552 | /* Remove all grabs that match the new one exactly */ | |
553 | for (grab = wPassiveGrabs(pGrab->window); grab; grab = grab->next) { | |
554 | if (GrabsAreIdentical(pGrab, grab)) { | |
555 | DeletePassiveGrabFromList(grab); | |
556 | break; | |
557 | } | |
558 | } | |
559 | ||
560 | if (!pGrab->window->optional && !MakeWindowOptional(pGrab->window)) { | |
561 | FreeGrab(pGrab); | |
562 | return BadAlloc; | |
563 | } | |
564 | ||
565 | pGrab->next = pGrab->window->optional->passiveGrabs; | |
566 | pGrab->window->optional->passiveGrabs = pGrab; | |
567 | if (AddResource(pGrab->resource, RT_PASSIVEGRAB, (pointer) pGrab)) | |
568 | return Success; | |
569 | return BadAlloc; | |
570 | } | |
571 | ||
572 | /* the following is kinda complicated, because we need to be able to back out | |
573 | * if any allocation fails | |
574 | */ | |
575 | ||
576 | Bool | |
577 | DeletePassiveGrabFromList(GrabPtr pMinuendGrab) | |
578 | { | |
579 | GrabPtr grab; | |
580 | GrabPtr *deletes, *adds; | |
581 | Mask ***updates, **details; | |
582 | int i, ndels, nadds, nups; | |
583 | Bool ok; | |
584 | unsigned int any_modifier; | |
585 | unsigned int any_key; | |
586 | ||
587 | #define UPDATE(mask,exact) \ | |
588 | if (!(details[nups] = DeleteDetailFromMask(mask, exact))) \ | |
589 | ok = FALSE; \ | |
590 | else \ | |
591 | updates[nups++] = &(mask) | |
592 | ||
593 | i = 0; | |
594 | for (grab = wPassiveGrabs(pMinuendGrab->window); grab; grab = grab->next) | |
595 | i++; | |
596 | if (!i) | |
597 | return TRUE; | |
598 | deletes = malloc(i * sizeof(GrabPtr)); | |
599 | adds = malloc(i * sizeof(GrabPtr)); | |
600 | updates = malloc(i * sizeof(Mask **)); | |
601 | details = malloc(i * sizeof(Mask *)); | |
602 | if (!deletes || !adds || !updates || !details) { | |
603 | free(details); | |
604 | free(updates); | |
605 | free(adds); | |
606 | free(deletes); | |
607 | return FALSE; | |
608 | } | |
609 | ||
610 | any_modifier = (pMinuendGrab->grabtype == XI2) ? | |
611 | (unsigned int) XIAnyModifier : (unsigned int) AnyModifier; | |
612 | any_key = (pMinuendGrab->grabtype == XI2) ? | |
613 | (unsigned int) XIAnyKeycode : (unsigned int) AnyKey; | |
614 | ndels = nadds = nups = 0; | |
615 | ok = TRUE; | |
616 | for (grab = wPassiveGrabs(pMinuendGrab->window); | |
617 | grab && ok; grab = grab->next) { | |
618 | if ((CLIENT_BITS(grab->resource) != CLIENT_BITS(pMinuendGrab->resource)) | |
619 | || !GrabMatchesSecond(grab, pMinuendGrab, (grab->grabtype == CORE))) | |
620 | continue; | |
621 | if (GrabSupersedesSecond(pMinuendGrab, grab)) { | |
622 | deletes[ndels++] = grab; | |
623 | } | |
624 | else if ((grab->detail.exact == any_key) | |
625 | && (grab->modifiersDetail.exact != any_modifier)) { | |
626 | UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact); | |
627 | } | |
628 | else if ((grab->modifiersDetail.exact == any_modifier) | |
629 | && (grab->detail.exact != any_key)) { | |
630 | UPDATE(grab->modifiersDetail.pMask, | |
631 | pMinuendGrab->modifiersDetail.exact); | |
632 | } | |
633 | else if ((pMinuendGrab->detail.exact != any_key) | |
634 | && (pMinuendGrab->modifiersDetail.exact != any_modifier)) { | |
635 | GrabPtr pNewGrab; | |
636 | GrabParameters param; | |
637 | ||
638 | UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact); | |
639 | ||
640 | memset(¶m, 0, sizeof(param)); | |
641 | param.ownerEvents = grab->ownerEvents; | |
642 | param.this_device_mode = grab->keyboardMode; | |
643 | param.other_devices_mode = grab->pointerMode; | |
644 | param.modifiers = any_modifier; | |
645 | ||
646 | pNewGrab = CreateGrab(CLIENT_ID(grab->resource), grab->device, | |
647 | grab->modifierDevice, grab->window, | |
648 | grab->grabtype, | |
649 | (GrabMask *) &grab->eventMask, | |
650 | ¶m, (int) grab->type, | |
651 | pMinuendGrab->detail.exact, | |
652 | grab->confineTo, grab->cursor); | |
653 | if (!pNewGrab) | |
654 | ok = FALSE; | |
655 | else if (!(pNewGrab->modifiersDetail.pMask = | |
656 | DeleteDetailFromMask(grab->modifiersDetail.pMask, | |
657 | pMinuendGrab->modifiersDetail. | |
658 | exact)) | |
659 | || (!pNewGrab->window->optional && | |
660 | !MakeWindowOptional(pNewGrab->window))) { | |
661 | FreeGrab(pNewGrab); | |
662 | ok = FALSE; | |
663 | } | |
664 | else if (!AddResource(pNewGrab->resource, RT_PASSIVEGRAB, | |
665 | (pointer) pNewGrab)) | |
666 | ok = FALSE; | |
667 | else | |
668 | adds[nadds++] = pNewGrab; | |
669 | } | |
670 | else if (pMinuendGrab->detail.exact == any_key) { | |
671 | UPDATE(grab->modifiersDetail.pMask, | |
672 | pMinuendGrab->modifiersDetail.exact); | |
673 | } | |
674 | else { | |
675 | UPDATE(grab->detail.pMask, pMinuendGrab->detail.exact); | |
676 | } | |
677 | } | |
678 | ||
679 | if (!ok) { | |
680 | for (i = 0; i < nadds; i++) | |
681 | FreeResource(adds[i]->resource, RT_NONE); | |
682 | for (i = 0; i < nups; i++) | |
683 | free(details[i]); | |
684 | } | |
685 | else { | |
686 | for (i = 0; i < ndels; i++) | |
687 | FreeResource(deletes[i]->resource, RT_NONE); | |
688 | for (i = 0; i < nadds; i++) { | |
689 | grab = adds[i]; | |
690 | grab->next = grab->window->optional->passiveGrabs; | |
691 | grab->window->optional->passiveGrabs = grab; | |
692 | } | |
693 | for (i = 0; i < nups; i++) { | |
694 | free(*updates[i]); | |
695 | *updates[i] = details[i]; | |
696 | } | |
697 | } | |
698 | free(details); | |
699 | free(updates); | |
700 | free(adds); | |
701 | free(deletes); | |
702 | return ok; | |
703 | ||
704 | #undef UPDATE | |
705 | } | |
706 | ||
707 | Bool | |
708 | GrabIsPointerGrab(GrabPtr grab) | |
709 | { | |
710 | return (grab->type == ButtonPress || | |
711 | grab->type == DeviceButtonPress || grab->type == XI_ButtonPress); | |
712 | } | |
713 | ||
714 | Bool | |
715 | GrabIsKeyboardGrab(GrabPtr grab) | |
716 | { | |
717 | return (grab->type == KeyPress || | |
718 | grab->type == DeviceKeyPress || grab->type == XI_KeyPress); | |
719 | } |