xipassivegrab.c revision 706f2543 
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
48int
49SProcXIPassiveGrabDevice(ClientPtr client)
50{
51    int i;
52    char n;
53    xXIModifierInfo *mods;
54
55    REQUEST(xXIPassiveGrabDeviceReq);
56    REQUEST_AT_LEAST_SIZE(xXIPassiveGrabDeviceReq);
57
58    swaps(&stuff->length, n);
59    swaps(&stuff->deviceid, n);
60    swapl(&stuff->grab_window, n);
61    swapl(&stuff->cursor, n);
62    swapl(&stuff->time, n);
63    swapl(&stuff->detail, n);
64    swaps(&stuff->mask_len, n);
65    swaps(&stuff->num_modifiers, n);
66
67    REQUEST_FIXED_SIZE(xXIPassiveGrabDeviceReq,
68        ((uint32_t) stuff->mask_len + stuff->num_modifiers) *4);
69    mods = (xXIModifierInfo*)&stuff[1];
70
71    for (i = 0; i < stuff->num_modifiers; i++, mods++)
72    {
73        swapl(&mods->base_mods, n);
74        swapl(&mods->latched_mods, n);
75        swapl(&mods->locked_mods, n);
76    }
77
78    return ProcXIPassiveGrabDevice(client);
79}
80
81int
82ProcXIPassiveGrabDevice(ClientPtr client)
83{
84    DeviceIntPtr dev, mod_dev;
85    xXIPassiveGrabDeviceReply rep;
86    int i, ret = Success;
87    uint8_t status;
88    uint32_t *modifiers;
89    xXIGrabModifierInfo *modifiers_failed;
90    GrabMask mask;
91    GrabParameters param;
92    void *tmp;
93    int mask_len;
94    int n;
95
96    REQUEST(xXIPassiveGrabDeviceReq);
97    REQUEST_FIXED_SIZE(xXIPassiveGrabDeviceReq,
98        ((uint32_t) stuff->mask_len + stuff->num_modifiers) * 4);
99
100    if (stuff->deviceid == XIAllDevices)
101        dev = inputInfo.all_devices;
102    else if (stuff->deviceid == XIAllMasterDevices)
103        dev = inputInfo.all_master_devices;
104    else
105    {
106        ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
107        if (ret != Success)
108        {
109            client->errorValue = stuff->deviceid;
110            return ret;
111        }
112    }
113
114    if (stuff->grab_type != XIGrabtypeButton &&
115        stuff->grab_type != XIGrabtypeKeycode &&
116        stuff->grab_type != XIGrabtypeEnter &&
117        stuff->grab_type != XIGrabtypeFocusIn)
118    {
119        client->errorValue = stuff->grab_type;
120        return BadValue;
121    }
122
123    if ((stuff->grab_type == XIGrabtypeEnter ||
124         stuff->grab_type == XIGrabtypeFocusIn) && stuff->detail != 0)
125    {
126        client->errorValue = stuff->detail;
127        return BadValue;
128    }
129
130    if (XICheckInvalidMaskBits(client, (unsigned char*)&stuff[1],
131                               stuff->mask_len * 4) != Success)
132        return BadValue;
133
134    mask_len = min(sizeof(mask.xi2mask[stuff->deviceid]), stuff->mask_len * 4);
135    memset(mask.xi2mask, 0, sizeof(mask.xi2mask));
136    memcpy(mask.xi2mask[stuff->deviceid], &stuff[1], mask_len * 4);
137
138    rep.repType = X_Reply;
139    rep.RepType = X_XIPassiveGrabDevice;
140    rep.length = 0;
141    rep.sequenceNumber = client->sequence;
142    rep.num_modifiers = 0;
143
144    memset(&param, 0, sizeof(param));
145    param.grabtype = GRABTYPE_XI2;
146    param.ownerEvents = stuff->owner_events;
147    param.grabWindow = stuff->grab_window;
148    param.cursor = stuff->cursor;
149
150    if (IsKeyboardDevice(dev)) {
151        param.this_device_mode = stuff->grab_mode;
152        param.other_devices_mode = stuff->paired_device_mode;
153    } else {
154        param.this_device_mode = stuff->paired_device_mode;
155        param.other_devices_mode = stuff->grab_mode;
156    }
157
158    if (stuff->cursor != None)
159    {
160        status = dixLookupResourceByType(&tmp, stuff->cursor,
161                                         RT_CURSOR, client, DixUseAccess);
162	if (status != Success)
163	{
164	    client->errorValue = stuff->cursor;
165	    return status;
166	}
167    }
168
169    status = dixLookupWindow((WindowPtr*)&tmp, stuff->grab_window, client, DixSetAttrAccess);
170    if (status != Success)
171	return status;
172
173    status = CheckGrabValues(client, &param);
174    if (status != Success)
175        return status;
176
177    modifiers = (uint32_t*)&stuff[1] + stuff->mask_len;
178    modifiers_failed = calloc(stuff->num_modifiers, sizeof(xXIGrabModifierInfo));
179    if (!modifiers_failed)
180        return BadAlloc;
181
182    if (!IsMaster(dev) && dev->u.master)
183        mod_dev = GetMaster(dev, MASTER_KEYBOARD);
184    else
185        mod_dev = dev;
186
187    for (i = 0; i < stuff->num_modifiers; i++, modifiers++)
188    {
189        param.modifiers = *modifiers;
190        switch(stuff->grab_type)
191        {
192            case XIGrabtypeButton:
193                status = GrabButton(client, dev, mod_dev, stuff->detail,
194                                    &param, GRABTYPE_XI2, &mask);
195                break;
196            case XIGrabtypeKeycode:
197                status = GrabKey(client, dev, mod_dev, stuff->detail,
198                                 &param, GRABTYPE_XI2, &mask);
199                break;
200            case XIGrabtypeEnter:
201            case XIGrabtypeFocusIn:
202                status = GrabWindow(client, dev, stuff->grab_type,
203                                    &param, &mask);
204                break;
205        }
206
207        if (status != GrabSuccess)
208        {
209            xXIGrabModifierInfo *info = modifiers_failed + rep.num_modifiers;
210
211            info->status = status;
212            info->modifiers = *modifiers;
213            if (client->swapped)
214                swapl(&info->modifiers, n);
215
216            rep.num_modifiers++;
217            rep.length += bytes_to_int32(sizeof(xXIGrabModifierInfo));
218        }
219    }
220
221    WriteReplyToClient(client, sizeof(rep), &rep);
222    if (rep.num_modifiers)
223        WriteToClient(client, rep.length * 4, (char*)modifiers_failed);
224
225    free(modifiers_failed);
226    return ret;
227}
228
229void
230SRepXIPassiveGrabDevice(ClientPtr client, int size,
231                        xXIPassiveGrabDeviceReply * rep)
232{
233    char n;
234
235    swaps(&rep->sequenceNumber, n);
236    swapl(&rep->length, n);
237    swaps(&rep->num_modifiers, n);
238
239    WriteToClient(client, size, (char *)rep);
240}
241
242int
243SProcXIPassiveUngrabDevice(ClientPtr client)
244{
245    char n;
246    int i;
247    uint32_t *modifiers;
248
249    REQUEST(xXIPassiveUngrabDeviceReq);
250    REQUEST_AT_LEAST_SIZE(xXIPassiveUngrabDeviceReq);
251
252    swaps(&stuff->length, n);
253    swapl(&stuff->grab_window, n);
254    swaps(&stuff->deviceid, n);
255    swapl(&stuff->detail, n);
256    swaps(&stuff->num_modifiers, n);
257
258    REQUEST_FIXED_SIZE(xXIPassiveUngrabDeviceReq,
259                       ((uint32_t) stuff->num_modifiers) << 2);
260    modifiers = (uint32_t*)&stuff[1];
261
262    for (i = 0; i < stuff->num_modifiers; i++, modifiers++)
263        swapl(modifiers, n);
264
265    return ProcXIPassiveUngrabDevice(client);
266}
267
268int
269ProcXIPassiveUngrabDevice(ClientPtr client)
270{
271    DeviceIntPtr dev, mod_dev;
272    WindowPtr win;
273    GrabRec tempGrab;
274    uint32_t* modifiers;
275    int i, rc;
276
277    REQUEST(xXIPassiveUngrabDeviceReq);
278    REQUEST_FIXED_SIZE(xXIPassiveUngrabDeviceReq,
279                       ((uint32_t) stuff->num_modifiers) << 2);
280
281    if (stuff->deviceid == XIAllDevices)
282        dev = inputInfo.all_devices;
283    else if (stuff->deviceid == XIAllMasterDevices)
284        dev = inputInfo.all_master_devices;
285    else
286    {
287        rc = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
288        if (rc != Success)
289	    return rc;
290    }
291
292    if (stuff->grab_type != XIGrabtypeButton &&
293        stuff->grab_type != XIGrabtypeKeycode &&
294        stuff->grab_type != XIGrabtypeEnter &&
295        stuff->grab_type != XIGrabtypeFocusIn)
296    {
297        client->errorValue = stuff->grab_type;
298        return BadValue;
299    }
300
301    if ((stuff->grab_type == XIGrabtypeEnter ||
302         stuff->grab_type == XIGrabtypeFocusIn) && stuff->detail != 0)
303    {
304        client->errorValue = stuff->detail;
305        return BadValue;
306    }
307
308    rc = dixLookupWindow(&win, stuff->grab_window, client, DixSetAttrAccess);
309    if (rc != Success)
310        return rc;
311
312    if (!IsMaster(dev) && dev->u.master)
313        mod_dev = GetMaster(dev, MASTER_KEYBOARD);
314    else
315        mod_dev = dev;
316
317    tempGrab.resource = client->clientAsMask;
318    tempGrab.device = dev;
319    tempGrab.window = win;
320    switch(stuff->grab_type)
321    {
322        case XIGrabtypeButton:  tempGrab.type = XI_ButtonPress; break;
323        case XIGrabtypeKeycode:  tempGrab.type = XI_KeyPress;    break;
324        case XIGrabtypeEnter:   tempGrab.type = XI_Enter;       break;
325        case XIGrabtypeFocusIn: tempGrab.type = XI_FocusIn;     break;
326    }
327    tempGrab.grabtype = GRABTYPE_XI2;
328    tempGrab.modifierDevice = mod_dev;
329    tempGrab.modifiersDetail.pMask = NULL;
330    tempGrab.detail.exact = stuff->detail;
331    tempGrab.detail.pMask = NULL;
332
333    modifiers = (uint32_t*)&stuff[1];
334
335    for (i = 0; i < stuff->num_modifiers; i++, modifiers++)
336    {
337        tempGrab.modifiersDetail.exact = *modifiers;
338        DeletePassiveGrabFromList(&tempGrab);
339    }
340
341    return Success;
342}
343