XIGrabDevice.c revision b789ec8a 
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 */
24
25#include <stdint.h>
26#include <X11/Xlibint.h>
27#include <X11/extensions/XI2proto.h>
28#include <X11/extensions/XInput2.h>
29#include <X11/extensions/extutil.h>
30#include "XIint.h"
31
32
33Status
34XIGrabDevice(Display* dpy, int deviceid, Window grab_window, Time time,
35             Cursor cursor, int grab_mode, int paired_device_mode,
36             Bool owner_events, XIEventMask *mask)
37{
38    xXIGrabDeviceReq *req;
39    xXIGrabDeviceReply reply;
40    char* buff;
41    int len;
42
43    XExtDisplayInfo *extinfo = XInput_find_display(dpy);
44
45    LockDisplay(dpy);
46    if (_XiCheckExtInit(dpy, XInput_2_0, extinfo) == -1)
47	return (NoSuchExtension);
48
49    GetReq(XIGrabDevice, req);
50    req->reqType  = extinfo->codes->major_opcode;
51    req->ReqType  = X_XIGrabDevice;
52    req->deviceid = deviceid;
53    req->grab_window = grab_window;
54    req->time = time;
55    req->grab_mode = grab_mode;
56    req->paired_device_mode = paired_device_mode;
57    req->owner_events = owner_events;
58    req->mask_len = (mask->mask_len + 3)/4;
59    req->cursor = cursor;
60
61
62    /* mask->mask_len is in bytes, but we need 4-byte units on the wire,
63     * and they need to be padded with 0 */
64    len = req->mask_len;
65    buff = calloc(1, len * 4);
66    memcpy(buff, mask->mask, mask->mask_len);
67
68    SetReqLen(req, len, len);
69    Data(dpy, buff, len * 4);
70    free(buff);
71
72    if (_XReply(dpy, (xReply *)&reply, 0, xTrue) == 0)
73	reply.status = GrabSuccess;
74
75    UnlockDisplay(dpy);
76    SyncHandle();
77
78    return reply.status;
79}
80
81Status
82XIUngrabDevice(Display* dpy, int deviceid, Time time)
83{
84    xXIUngrabDeviceReq *req;
85
86    XExtDisplayInfo *info = XInput_find_display(dpy);
87
88    LockDisplay(dpy);
89    if (_XiCheckExtInit(dpy, XInput_2_0, info) == -1)
90	return (NoSuchExtension);
91
92    GetReq(XIUngrabDevice, req);
93    req->reqType = info->codes->major_opcode;
94    req->ReqType = X_XIUngrabDevice;
95
96    req->deviceid = deviceid;
97    req->time = time;
98
99    UnlockDisplay(dpy);
100    SyncHandle();
101    return (Success);
102}
103
104
105