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
41#include "exglobals.h"          /* BadDevice */
42#include "exevents.h"
43#include "xigrabdev.h"
44#include "inpututils.h"
45
46int _X_COLD
47SProcXIGrabDevice(ClientPtr client)
48{
49    REQUEST(xXIGrabDeviceReq);
50    /*
51     * Check here for at least the length of the struct we swap, then
52     * let ProcXIGrabDevice check the full size after we swap mask_len.
53     */
54    REQUEST_AT_LEAST_SIZE(xXIGrabDeviceReq);
55
56    swaps(&stuff->length);
57    swaps(&stuff->deviceid);
58    swapl(&stuff->grab_window);
59    swapl(&stuff->cursor);
60    swapl(&stuff->time);
61    swaps(&stuff->mask_len);
62
63    return ProcXIGrabDevice(client);
64}
65
66int
67ProcXIGrabDevice(ClientPtr client)
68{
69    DeviceIntPtr dev;
70    xXIGrabDeviceReply rep;
71    int ret = Success;
72    uint8_t status;
73    GrabMask mask = { 0 };
74    int mask_len;
75    unsigned int keyboard_mode;
76    unsigned int pointer_mode;
77
78    REQUEST(xXIGrabDeviceReq);
79    REQUEST_FIXED_SIZE(xXIGrabDeviceReq, ((size_t) stuff->mask_len) * 4);
80
81    ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGrabAccess);
82    if (ret != Success)
83        return ret;
84
85    if (!dev->enabled)
86        return AlreadyGrabbed;
87
88    if (!IsMaster(dev))
89        stuff->paired_device_mode = GrabModeAsync;
90
91    if (IsKeyboardDevice(dev)) {
92        keyboard_mode = stuff->grab_mode;
93        pointer_mode = stuff->paired_device_mode;
94    }
95    else {
96        keyboard_mode = stuff->paired_device_mode;
97        pointer_mode = stuff->grab_mode;
98    }
99
100    if (XICheckInvalidMaskBits(client, (unsigned char *) &stuff[1],
101                               stuff->mask_len * 4) != Success)
102        return BadValue;
103
104    mask.xi2mask = xi2mask_new();
105    if (!mask.xi2mask)
106        return BadAlloc;
107
108    mask_len = min(xi2mask_mask_size(mask.xi2mask), stuff->mask_len * 4);
109    /* FIXME: I think the old code was broken here */
110    xi2mask_set_one_mask(mask.xi2mask, dev->id, (unsigned char *) &stuff[1],
111                         mask_len);
112
113    ret = GrabDevice(client, dev, pointer_mode,
114                     keyboard_mode,
115                     stuff->grab_window,
116                     stuff->owner_events,
117                     stuff->time,
118                     &mask, XI2, stuff->cursor, None /* confineTo */ ,
119                     &status);
120
121    xi2mask_free(&mask.xi2mask);
122
123    if (ret != Success)
124        return ret;
125
126    rep = (xXIGrabDeviceReply) {
127        .repType = X_Reply,
128        .RepType = X_XIGrabDevice,
129        .sequenceNumber = client->sequence,
130        .length = 0,
131        .status = status
132    };
133
134    WriteReplyToClient(client, sizeof(rep), &rep);
135    return ret;
136}
137
138int _X_COLD
139SProcXIUngrabDevice(ClientPtr client)
140{
141    REQUEST(xXIUngrabDeviceReq);
142    REQUEST_SIZE_MATCH(xXIUngrabDeviceReq);
143
144    swaps(&stuff->length);
145    swaps(&stuff->deviceid);
146    swapl(&stuff->time);
147
148    return ProcXIUngrabDevice(client);
149}
150
151int
152ProcXIUngrabDevice(ClientPtr client)
153{
154    DeviceIntPtr dev;
155    GrabPtr grab;
156    int ret = Success;
157    TimeStamp time;
158
159    REQUEST(xXIUngrabDeviceReq);
160    REQUEST_SIZE_MATCH(xXIUngrabDeviceReq);
161
162    ret = dixLookupDevice(&dev, stuff->deviceid, client, DixGetAttrAccess);
163    if (ret != Success)
164        return ret;
165
166    grab = dev->deviceGrab.grab;
167
168    time = ClientTimeToServerTime(stuff->time);
169    if ((CompareTimeStamps(time, currentTime) != LATER) &&
170        (CompareTimeStamps(time, dev->deviceGrab.grabTime) != EARLIER) &&
171        (grab) && SameClient(grab, client) && grab->grabtype == XI2)
172        (*dev->deviceGrab.DeactivateGrab) (dev);
173
174    return Success;
175}
176
177void _X_COLD
178SRepXIGrabDevice(ClientPtr client, int size, xXIGrabDeviceReply * rep)
179{
180    swaps(&rep->sequenceNumber);
181    swapl(&rep->length);
182    WriteToClient(client, size, rep);
183}
184