selectev.c revision 706f2543 
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
54#ifdef HAVE_DIX_CONFIG_H
55#include <dix-config.h>
56#endif
57
58#include "inputstr.h"	/* DeviceIntPtr      */
59#include "windowstr.h"	/* window structure  */
60#include <X11/extensions/XI.h>
61#include <X11/extensions/XI2.h>
62#include <X11/extensions/XIproto.h>
63#include "exevents.h"
64#include "exglobals.h"
65
66#include "grabdev.h"
67#include "selectev.h"
68
69extern Mask ExtExclusiveMasks[];
70
71static int
72HandleDevicePresenceMask(ClientPtr client, WindowPtr win,
73                         XEventClass *cls, CARD16 *count)
74{
75    int i, j;
76    Mask mask;
77
78    /* We use the device ID 256 to select events that aren't bound to
79     * any device.  For now we only handle the device presence event,
80     * but this could be extended to other events that aren't bound to
81     * a device.
82     *
83     * In order not to break in CreateMaskFromList() we remove the
84     * entries with device ID 256 from the XEventClass array.
85     */
86
87    mask = 0;
88    for (i = 0, j = 0; i < *count; i++) {
89        if (cls[i] >> 8 != 256) {
90            cls[j] = cls[i];
91            j++;
92            continue;
93        }
94
95        switch (cls[i] & 0xff) {
96        case _devicePresence:
97            mask |= DevicePresenceNotifyMask;
98            break;
99        }
100    }
101
102    *count = j;
103
104    if (mask == 0)
105        return Success;
106
107    /* We always only use mksidx = AllDevices for events not bound to
108     * devices */
109    if (AddExtensionClient (win, client, mask, XIAllDevices) != Success)
110        return BadAlloc;
111
112    RecalculateDeviceDeliverableEvents(win);
113
114    return Success;
115}
116
117/***********************************************************************
118 *
119 * Handle requests from clients with a different byte order.
120 *
121 */
122
123int
124SProcXSelectExtensionEvent(ClientPtr client)
125{
126    char n;
127
128    REQUEST(xSelectExtensionEventReq);
129    swaps(&stuff->length, n);
130    REQUEST_AT_LEAST_SIZE(xSelectExtensionEventReq);
131    swapl(&stuff->window, n);
132    swaps(&stuff->count, n);
133    REQUEST_FIXED_SIZE(xSelectExtensionEventReq,
134                      stuff->count * sizeof(CARD32));
135    SwapLongs((CARD32 *) (&stuff[1]), stuff->count);
136
137    return (ProcXSelectExtensionEvent(client));
138}
139
140/***********************************************************************
141 *
142 * This procedure selects input from an extension device.
143 *
144 */
145
146int
147ProcXSelectExtensionEvent(ClientPtr client)
148{
149    int ret;
150    int i;
151    WindowPtr pWin;
152    struct tmask tmp[EMASKSIZE];
153
154    REQUEST(xSelectExtensionEventReq);
155    REQUEST_AT_LEAST_SIZE(xSelectExtensionEventReq);
156
157    if (stuff->length != bytes_to_int32(sizeof(xSelectExtensionEventReq)) + stuff->count)
158	return BadLength;
159
160    ret = dixLookupWindow(&pWin, stuff->window, client, DixReceiveAccess);
161    if (ret != Success)
162	return ret;
163
164    if (HandleDevicePresenceMask(client, pWin, (XEventClass *) & stuff[1],
165                                &stuff->count) != Success)
166	return BadAlloc;
167
168    if ((ret = CreateMaskFromList(client, (XEventClass *) & stuff[1],
169				  stuff->count, tmp, NULL,
170				  X_SelectExtensionEvent)) != Success)
171	return ret;
172
173    for (i = 0; i < EMASKSIZE; i++)
174	if (tmp[i].dev != NULL) {
175            if (tmp[i].mask & ~XIAllMasks) {
176                client->errorValue = tmp[i].mask;
177                return BadValue;
178            }
179	    if ((ret =
180		 SelectForWindow((DeviceIntPtr) tmp[i].dev, pWin, client,
181				 tmp[i].mask, ExtExclusiveMasks[i]))!= Success)
182		return ret;
183	}
184
185    return Success;
186}
187