selectev.c revision 4642e01f 
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 * Request to select input from an extension device.
50 *
51 */
52
53#define	 NEED_EVENTS
54#define	 NEED_REPLIES
55
56#ifdef HAVE_DIX_CONFIG_H
57#include <dix-config.h>
58#endif
59
60#include "inputstr.h"	/* DeviceIntPtr      */
61#include "windowstr.h"	/* window structure  */
62#include <X11/extensions/XI.h>
63#include <X11/extensions/XIproto.h>
64#include "exevents.h"
65#include "exglobals.h"
66
67#include "grabdev.h"
68#include "selectev.h"
69
70extern Mask ExtExclusiveMasks[];
71extern Mask ExtValidMasks[];
72
73static int
74HandleDevicePresenceMask(ClientPtr client, WindowPtr win,
75                         XEventClass *cls, CARD16 *count)
76{
77    int i, j;
78    Mask mask;
79
80    /* We use the device ID 256 to select events that aren't bound to
81     * any device.  For now we only handle the device presence event,
82     * but this could be extended to other events that aren't bound to
83     * a device.
84     *
85     * In order not to break in CreateMaskFromList() we remove the
86     * entries with device ID 256 from the XEventClass array.
87     */
88
89    mask = 0;
90    for (i = 0, j = 0; i < *count; i++) {
91        if (cls[i] >> 8 != 256) {
92            cls[j] = cls[i];
93            j++;
94            continue;
95        }
96
97        switch (cls[i] & 0xff) {
98        case _devicePresence:
99            mask |= DevicePresenceNotifyMask;
100            break;
101        }
102    }
103
104    *count = j;
105
106    if (mask == 0)
107        return Success;
108
109    /* We always only use mksidx = MAXDEVICES for events not bound to
110     * devices */
111
112    if (AddExtensionClient (win, client, mask, MAXDEVICES) != Success)
113        return BadAlloc;
114
115    RecalculateDeviceDeliverableEvents(win);
116
117    return Success;
118}
119
120/***********************************************************************
121 *
122 * Handle requests from clients with a different byte order.
123 *
124 */
125
126int
127SProcXSelectExtensionEvent(ClientPtr client)
128{
129    char n;
130
131    REQUEST(xSelectExtensionEventReq);
132    swaps(&stuff->length, n);
133    REQUEST_AT_LEAST_SIZE(xSelectExtensionEventReq);
134    swapl(&stuff->window, n);
135    swaps(&stuff->count, n);
136    REQUEST_FIXED_SIZE(xSelectExtensionEventReq,
137                      stuff->count * sizeof(CARD32));
138    SwapLongs((CARD32 *) (&stuff[1]), stuff->count);
139
140    return (ProcXSelectExtensionEvent(client));
141}
142
143/***********************************************************************
144 *
145 * This procedure selects input from an extension device.
146 *
147 */
148
149int
150ProcXSelectExtensionEvent(ClientPtr client)
151{
152    int ret;
153    int i;
154    WindowPtr pWin;
155    struct tmask tmp[EMASKSIZE];
156
157    REQUEST(xSelectExtensionEventReq);
158    REQUEST_AT_LEAST_SIZE(xSelectExtensionEventReq);
159
160    if (stuff->length != (sizeof(xSelectExtensionEventReq) >> 2) + stuff->count)
161	return BadLength;
162
163    ret = dixLookupWindow(&pWin, stuff->window, client, DixReceiveAccess);
164    if (ret != Success)
165	return ret;
166
167    if (HandleDevicePresenceMask(client, pWin, (XEventClass *) & stuff[1],
168                                &stuff->count) != Success)
169	return BadAlloc;
170
171    if ((ret = CreateMaskFromList(client, (XEventClass *) & stuff[1],
172				  stuff->count, tmp, NULL,
173				  X_SelectExtensionEvent)) != Success)
174	return ret;
175
176    for (i = 0; i < EMASKSIZE; i++)
177	if (tmp[i].dev != NULL) {
178	    if ((ret =
179		 SelectForWindow((DeviceIntPtr) tmp[i].dev, pWin, client,
180				 tmp[i].mask, ExtExclusiveMasks[i],
181				 ExtValidMasks[i])) != Success)
182		return ret;
183	}
184
185    return Success;
186}
187