grabdev.c revision 05b261ec 
1/************************************************************
2
3Copyright 1989, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25Copyright 1989 by Hewlett-Packard Company, Palo Alto, California.
26
27			All Rights Reserved
28
29Permission to use, copy, modify, and distribute this software and its
30documentation for any purpose and without fee is hereby granted,
31provided that the above copyright notice appear in all copies and that
32both that copyright notice and this permission notice appear in
33supporting documentation, and that the name of Hewlett-Packard not be
34used in advertising or publicity pertaining to distribution of the
35software without specific, written prior permission.
36
37HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
38ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
39HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
40ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
41WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
42ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
43SOFTWARE.
44
45********************************************************/
46
47/***********************************************************************
48 *
49 * Extension function to grab an extension device.
50 *
51 */
52
53#define	 NEED_EVENTS
54#define	 NEED_REPLIES
55#ifdef HAVE_DIX_CONFIG_H
56#include <dix-config.h>
57#endif
58
59#include <X11/X.h>	/* for inputstr.h    */
60#include <X11/Xproto.h>	/* Request macro     */
61#include "inputstr.h"	/* DeviceIntPtr      */
62#include "windowstr.h"	/* window structure  */
63#include <X11/extensions/XI.h>
64#include <X11/extensions/XIproto.h>
65#include "extnsionst.h"
66#include "extinit.h"	/* LookupDeviceIntRec */
67#include "exglobals.h"
68#include "dixevents.h"	/* GrabDevice */
69
70#include "grabdev.h"
71
72extern XExtEventInfo EventInfo[];
73extern int ExtEventIndex;
74
75/***********************************************************************
76 *
77 * Swap the request if the requestor has a different byte order than us.
78 *
79 */
80
81int
82SProcXGrabDevice(ClientPtr client)
83{
84    char n;
85
86    REQUEST(xGrabDeviceReq);
87    swaps(&stuff->length, n);
88    REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
89    swapl(&stuff->grabWindow, n);
90    swapl(&stuff->time, n);
91    swaps(&stuff->event_count, n);
92
93    if (stuff->length != (sizeof(xGrabDeviceReq) >> 2) + stuff->event_count)
94       return BadLength;
95
96    SwapLongs((CARD32 *) (&stuff[1]), stuff->event_count);
97
98    return (ProcXGrabDevice(client));
99}
100
101/***********************************************************************
102 *
103 * Grab an extension device.
104 *
105 */
106
107int
108ProcXGrabDevice(ClientPtr client)
109{
110    int error;
111    xGrabDeviceReply rep;
112    DeviceIntPtr dev;
113    struct tmask tmp[EMASKSIZE];
114
115    REQUEST(xGrabDeviceReq);
116    REQUEST_AT_LEAST_SIZE(xGrabDeviceReq);
117
118    if (stuff->length != (sizeof(xGrabDeviceReq) >> 2) + stuff->event_count) {
119	SendErrorToClient(client, IReqCode, X_GrabDevice, 0, BadLength);
120	return Success;
121    }
122
123    rep.repType = X_Reply;
124    rep.RepType = X_GrabDevice;
125    rep.sequenceNumber = client->sequence;
126    rep.length = 0;
127
128    dev = LookupDeviceIntRec(stuff->deviceid);
129    if (dev == NULL) {
130	SendErrorToClient(client, IReqCode, X_GrabDevice, 0, BadDevice);
131	return Success;
132    }
133
134    if (CreateMaskFromList(client, (XEventClass *) & stuff[1],
135			   stuff->event_count, tmp, dev,
136			   X_GrabDevice) != Success)
137	return Success;
138
139    error = GrabDevice(client, dev, stuff->this_device_mode,
140		       stuff->other_devices_mode, stuff->grabWindow,
141		       stuff->ownerEvents, stuff->time,
142		       tmp[stuff->deviceid].mask, &rep.status);
143
144    if (error != Success) {
145	SendErrorToClient(client, IReqCode, X_GrabDevice, 0, error);
146	return Success;
147    }
148    WriteReplyToClient(client, sizeof(xGrabDeviceReply), &rep);
149    return Success;
150}
151
152/***********************************************************************
153 *
154 * This procedure creates an event mask from a list of XEventClasses.
155 *
156 */
157
158int
159CreateMaskFromList(ClientPtr client, XEventClass * list, int count,
160		   struct tmask *mask, DeviceIntPtr dev, int req)
161{
162    int i, j;
163    int device;
164    DeviceIntPtr tdev;
165
166    for (i = 0; i < EMASKSIZE; i++) {
167	mask[i].mask = 0;
168	mask[i].dev = NULL;
169    }
170
171    for (i = 0; i < count; i++, list++) {
172	device = *list >> 8;
173	if (device > 255) {
174	    SendErrorToClient(client, IReqCode, req, 0, BadClass);
175	    return BadClass;
176	}
177	tdev = LookupDeviceIntRec(device);
178	if (tdev == NULL || (dev != NULL && tdev != dev)) {
179	    SendErrorToClient(client, IReqCode, req, 0, BadClass);
180	    return BadClass;
181	}
182
183	for (j = 0; j < ExtEventIndex; j++)
184	    if (EventInfo[j].type == (*list & 0xff)) {
185		mask[device].mask |= EventInfo[j].mask;
186		mask[device].dev = (Pointer) tdev;
187		break;
188	    }
189    }
190    return Success;
191}
192
193/***********************************************************************
194 *
195 * This procedure writes the reply for the XGrabDevice function,
196 * if the client and server have a different byte ordering.
197 *
198 */
199
200void
201SRepXGrabDevice(ClientPtr client, int size, xGrabDeviceReply * rep)
202{
203    char n;
204
205    swaps(&rep->sequenceNumber, n);
206    swapl(&rep->length, n);
207    WriteToClient(client, size, (char *)rep);
208}
209