xipassivegrab.c revision 806e81e9 
1/*
2 * Copyright © 2009 Red Hat, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Author: Peter Hutterer
24 */
25
26/***********************************************************************
27 *
28 * Request to grab or ungrab input device.
29 *
30 */
31
32#ifdef HAVE_DIX_CONFIG_H
33#include <dix-config.h>
34#endif
35
36#include "inputstr.h"           /* DeviceIntPtr      */
37#include "windowstr.h"          /* window structure  */
38#include <X11/extensions/XI2.h>
39#include <X11/extensions/XI2proto.h>
40#include "swaprep.h"
41
42#include "exglobals.h"          /* BadDevice */
43#include "exevents.h"
44#include "xipassivegrab.h"
45#include "dixgrabs.h"
46#include "misc.h"
47#include "inpututils.h"
48
49int _X_COLD
50SProcXIPassiveGrabDevice(ClientPtr client)
51{
52    int i;
53    uint32_t *mods;
54
55    REQUEST(xXIPassiveGrabDeviceReq);
56    REQUEST_AT_LEAST_SIZE(xXIPassiveGrabDeviceReq);
57
58    swaps(&stuff->length);
59    swaps(&stuff->deviceid);
60    swapl(&stuff->grab_window);
61    swapl(&stuff->cursor);
62    swapl(&stuff->time);
63    swapl(&stuff->detail);
64    swaps(&stuff->mask_len);
65    swaps(&stuff->num_modifiers);
66
67    REQUEST_FIXED_SIZE(xXIPassiveGrabDeviceReq,
68        ((uint32_t) stuff->mask_len + stuff->num_modifiers) *4);
69    mods = (uint32_t *) &stuff[1] + stuff->mask_len;
70
71    for (i = 0; i < stuff->num_modifiers; i++, mods++) {
72        swapl(mods);
73    }
74
75    return ProcXIPassiveGrabDevice(client);
76}
77
78int
79ProcXIPassiveGrabDevice(ClientPtr client)
80{
81    DeviceIntPtr dev, mod_dev;
82    xXIPassiveGrabDeviceReply rep = {
83        .repType = X_Reply,
84        .RepType = X_XIPassiveGrabDevice,
85        .sequenceNumber = client->sequence,
86        .length = 0,
87        .num_modifiers = 0
88    };
89    int i, ret = Success;
90    uint32_t *modifiers;
91    xXIGrabModifierInfo *modifiers_failed = NULL;
92    GrabMask mask = { 0 };
93    GrabParameters param;
94    void *tmp;
95    int mask_len;
96
97    REQUEST(xXIPassiveGrabDeviceReq);
98    REQUEST_FIXED_SIZE(xXIPassiveGrabDeviceReq,
99        ((uint32_t) stuff->mask_len + stuff->num_modifiers) * 4);
100
101    if (stuff->deviceid == XIAllDevices)
102        dev = inputInfo.all_devices;
103    else if (stuff->deviceid == XIAllMasterDevices)
104        dev = inputInfo.all_master_devices;
105    else {
106        ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
107        if (ret != Success) {
108            client->errorValue = stuff->deviceid;
109            return ret;
110        }
111    }
112
113    if (stuff->grab_type != XIGrabtypeButton &&
114        stuff->grab_type != XIGrabtypeKeycode &&
115        stuff->grab_type != XIGrabtypeEnter &&
116        stuff->grab_type != XIGrabtypeFocusIn &&
117        stuff->grab_type != XIGrabtypeTouchBegin) {
118        client->errorValue = stuff->grab_type;
119        return BadValue;
120    }
121
122    if ((stuff->grab_type == XIGrabtypeEnter ||
123         stuff->grab_type == XIGrabtypeFocusIn ||
124         stuff->grab_type == XIGrabtypeTouchBegin) && stuff->detail != 0) {
125        client->errorValue = stuff->detail;
126        return BadValue;
127    }
128
129    if (stuff->grab_type == XIGrabtypeTouchBegin &&
130        (stuff->grab_mode != XIGrabModeTouch ||
131         stuff->paired_device_mode != GrabModeAsync)) {
132        client->errorValue = stuff->grab_mode;
133        return BadValue;
134    }
135
136    if (XICheckInvalidMaskBits(client, (unsigned char *) &stuff[1],
137                               stuff->mask_len * 4) != Success)
138        return BadValue;
139
140    mask.xi2mask = xi2mask_new();
141    if (!mask.xi2mask)
142        return BadAlloc;
143
144    mask_len = min(xi2mask_mask_size(mask.xi2mask), stuff->mask_len * 4);
145    xi2mask_set_one_mask(mask.xi2mask, stuff->deviceid,
146                         (unsigned char *) &stuff[1], mask_len * 4);
147
148    memset(&param, 0, sizeof(param));
149    param.grabtype = XI2;
150    param.ownerEvents = stuff->owner_events;
151    param.grabWindow = stuff->grab_window;
152    param.cursor = stuff->cursor;
153
154    if (IsKeyboardDevice(dev)) {
155        param.this_device_mode = stuff->grab_mode;
156        param.other_devices_mode = stuff->paired_device_mode;
157    }
158    else {
159        param.this_device_mode = stuff->paired_device_mode;
160        param.other_devices_mode = stuff->grab_mode;
161    }
162
163    if (stuff->cursor != None) {
164        ret = dixLookupResourceByType(&tmp, stuff->cursor,
165                                      RT_CURSOR, client, DixUseAccess);
166        if (ret != Success) {
167            client->errorValue = stuff->cursor;
168            goto out;
169        }
170    }
171
172    ret =
173        dixLookupWindow((WindowPtr *) &tmp, stuff->grab_window, client,
174                        DixSetAttrAccess);
175    if (ret != Success)
176        goto out;
177
178    ret = CheckGrabValues(client, &param);
179    if (ret != Success)
180        goto out;
181
182    modifiers = (uint32_t *) &stuff[1] + stuff->mask_len;
183    modifiers_failed =
184        calloc(stuff->num_modifiers, sizeof(xXIGrabModifierInfo));
185    if (!modifiers_failed) {
186        ret = BadAlloc;
187        goto out;
188    }
189
190    mod_dev = (IsFloating(dev)) ? dev : GetMaster(dev, MASTER_KEYBOARD);
191
192    for (i = 0; i < stuff->num_modifiers; i++, modifiers++) {
193        uint8_t status = Success;
194
195        param.modifiers = *modifiers;
196        ret = CheckGrabValues(client, &param);
197        if (ret != Success)
198            goto out;
199
200        switch (stuff->grab_type) {
201        case XIGrabtypeButton:
202            status = GrabButton(client, dev, mod_dev, stuff->detail,
203                                &param, XI2, &mask);
204            break;
205        case XIGrabtypeKeycode:
206            /* XI2 allows 32-bit keycodes but thanks to XKB we can never
207             * implement this. Just return an error for all keycodes that
208             * cannot work anyway */
209            if (stuff->detail > 255)
210                status = XIAlreadyGrabbed;
211            else
212                status = GrabKey(client, dev, mod_dev, stuff->detail,
213                                 &param, XI2, &mask);
214            break;
215        case XIGrabtypeEnter:
216        case XIGrabtypeFocusIn:
217            status = GrabWindow(client, dev, stuff->grab_type, &param, &mask);
218            break;
219        case XIGrabtypeTouchBegin:
220            status = GrabTouch(client, dev, mod_dev, &param, &mask);
221            break;
222        }
223
224        if (status != GrabSuccess) {
225            xXIGrabModifierInfo *info = modifiers_failed + rep.num_modifiers;
226
227            info->status = status;
228            info->modifiers = *modifiers;
229            if (client->swapped)
230                swapl(&info->modifiers);
231
232            rep.num_modifiers++;
233            rep.length += bytes_to_int32(sizeof(xXIGrabModifierInfo));
234        }
235    }
236
237    WriteReplyToClient(client, sizeof(rep), &rep);
238    if (rep.num_modifiers)
239        WriteToClient(client, rep.length * 4, modifiers_failed);
240
241 out:
242    free(modifiers_failed);
243    xi2mask_free(&mask.xi2mask);
244    return ret;
245}
246
247void _X_COLD
248SRepXIPassiveGrabDevice(ClientPtr client, int size,
249                        xXIPassiveGrabDeviceReply * rep)
250{
251    swaps(&rep->sequenceNumber);
252    swapl(&rep->length);
253    swaps(&rep->num_modifiers);
254
255    WriteToClient(client, size, rep);
256}
257
258int _X_COLD
259SProcXIPassiveUngrabDevice(ClientPtr client)
260{
261    int i;
262    uint32_t *modifiers;
263
264    REQUEST(xXIPassiveUngrabDeviceReq);
265    REQUEST_AT_LEAST_SIZE(xXIPassiveUngrabDeviceReq);
266
267    swaps(&stuff->length);
268    swapl(&stuff->grab_window);
269    swaps(&stuff->deviceid);
270    swapl(&stuff->detail);
271    swaps(&stuff->num_modifiers);
272
273    REQUEST_FIXED_SIZE(xXIPassiveUngrabDeviceReq,
274                       ((uint32_t) stuff->num_modifiers) << 2);
275    modifiers = (uint32_t *) &stuff[1];
276
277    for (i = 0; i < stuff->num_modifiers; i++, modifiers++)
278        swapl(modifiers);
279
280    return ProcXIPassiveUngrabDevice(client);
281}
282
283int
284ProcXIPassiveUngrabDevice(ClientPtr client)
285{
286    DeviceIntPtr dev, mod_dev;
287    WindowPtr win;
288    GrabPtr tempGrab;
289    uint32_t *modifiers;
290    int i, rc;
291
292    REQUEST(xXIPassiveUngrabDeviceReq);
293    REQUEST_FIXED_SIZE(xXIPassiveUngrabDeviceReq,
294                       ((uint32_t) stuff->num_modifiers) << 2);
295
296    if (stuff->deviceid == XIAllDevices)
297        dev = inputInfo.all_devices;
298    else if (stuff->deviceid == XIAllMasterDevices)
299        dev = inputInfo.all_master_devices;
300    else {
301        rc = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
302        if (rc != Success)
303            return rc;
304    }
305
306    if (stuff->grab_type != XIGrabtypeButton &&
307        stuff->grab_type != XIGrabtypeKeycode &&
308        stuff->grab_type != XIGrabtypeEnter &&
309        stuff->grab_type != XIGrabtypeFocusIn &&
310        stuff->grab_type != XIGrabtypeTouchBegin) {
311        client->errorValue = stuff->grab_type;
312        return BadValue;
313    }
314
315    if ((stuff->grab_type == XIGrabtypeEnter ||
316         stuff->grab_type == XIGrabtypeFocusIn ||
317         stuff->grab_type == XIGrabtypeTouchBegin) && stuff->detail != 0) {
318        client->errorValue = stuff->detail;
319        return BadValue;
320    }
321
322    rc = dixLookupWindow(&win, stuff->grab_window, client, DixSetAttrAccess);
323    if (rc != Success)
324        return rc;
325
326    mod_dev = (IsFloating(dev)) ? dev : GetMaster(dev, MASTER_KEYBOARD);
327
328    tempGrab = AllocGrab(NULL);
329    if (!tempGrab)
330        return BadAlloc;
331
332    tempGrab->resource = client->clientAsMask;
333    tempGrab->device = dev;
334    tempGrab->window = win;
335    switch (stuff->grab_type) {
336    case XIGrabtypeButton:
337        tempGrab->type = XI_ButtonPress;
338        break;
339    case XIGrabtypeKeycode:
340        tempGrab->type = XI_KeyPress;
341        break;
342    case XIGrabtypeEnter:
343        tempGrab->type = XI_Enter;
344        break;
345    case XIGrabtypeFocusIn:
346        tempGrab->type = XI_FocusIn;
347        break;
348    case XIGrabtypeTouchBegin:
349        tempGrab->type = XI_TouchBegin;
350        break;
351    }
352    tempGrab->grabtype = XI2;
353    tempGrab->modifierDevice = mod_dev;
354    tempGrab->modifiersDetail.pMask = NULL;
355    tempGrab->detail.exact = stuff->detail;
356    tempGrab->detail.pMask = NULL;
357
358    modifiers = (uint32_t *) &stuff[1];
359
360    for (i = 0; i < stuff->num_modifiers; i++, modifiers++) {
361        tempGrab->modifiersDetail.exact = *modifiers;
362        DeletePassiveGrabFromList(tempGrab);
363    }
364
365    FreeGrab(tempGrab);
366
367    return Success;
368}
369