1 /*
2 * Copyright 2003 Red Hat Inc., Durham, North Carolina.
3 *
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation on the rights to use, copy, modify, merge,
10 * publish, distribute, sublicense, and/or sell copies of the Software,
11 * and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial
16 * portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
22 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
23 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * SOFTWARE.
26 */
27
28 /*
29 * Authors:
30 * Rickard E. (Rik) Faith <faith@redhat.com>
31 */
32
33 /** \file
34 *
35 * This file implements a mapping from remote XInput event types to Xdmx
36 * XInput event types.
37 *
38 * The exglobals.h file defines global server-side variables with names
39 * Device* to be integers that hold the value of the type of the
40 * server-side XInput extension event.
41 *
42 * The client-side X11/extensions/XInput.h file defines macros with THE
43 * EXACT SAME Device* names!
44 *
45 * Using those macros to extract remote server event type values from
46 * the (opaque) XDevice structure is appropriate, but makes a direct
47 * mapping to the Device* integers impossible. So we use the normalized
48 * XI_Device* names for these routines.
49 */
50
51 #ifdef HAVE_DMX_CONFIG_H
52 #include <dmx-config.h>
53 #endif
54
55 #include "dmxinputinit.h"
56 #include "dmxmap.h"
57
58 /** Create a mapping from \a remoteEvent to \a serverEvent. The \a
59 * remoteEvent is the type returned from the remote server. The \a
60 * serverEvent is from the XI_* list of events in
61 * include/extensions/XIproto.h. */
62 void
dmxMapInsert(DMXLocalInputInfoPtr dmxLocal,int remoteEvent,int serverEvent)63 dmxMapInsert(DMXLocalInputInfoPtr dmxLocal, int remoteEvent, int serverEvent)
64 {
65 int hash = remoteEvent & DMX_MAP_MASK;
66 int i;
67
68 /* Return if this has already been mapped */
69 if (dmxLocal->map[hash].remote == remoteEvent
70 && dmxLocal->map[hash].server == serverEvent)
71 return;
72
73 if (dmxLocal->map[hash].remote) {
74 dmxLocal->mapOptimize = 0;
75 for (i = 0; i < DMX_MAP_ENTRIES; i++) {
76 if (!dmxLocal->map[i].remote) {
77 dmxLocal->map[i].remote = remoteEvent;
78 dmxLocal->map[i].server = serverEvent;
79 return;
80 }
81 }
82 dmxLog(dmxWarning,
83 "Out of map entries, cannot map remove event type %d\n",
84 remoteEvent);
85 }
86 else {
87 dmxLocal->map[hash].remote = remoteEvent;
88 dmxLocal->map[hash].server = serverEvent;
89 }
90 }
91
92 /** Remove all mappings there were inserted with #dmxMapInsert. */
93 void
dmxMapClear(DMXLocalInputInfoPtr dmxLocal)94 dmxMapClear(DMXLocalInputInfoPtr dmxLocal)
95 {
96 int i;
97
98 for (i = 0; i < DMX_MAP_ENTRIES; i++)
99 dmxLocal->map[i].remote = 0;
100 dmxLocal->mapOptimize = 1;
101 }
102
103 /** Lookup a mapping for \a remoteEvent. The \a remoteEvent is the type
104 * returned from the remote server. The return value is that which was
105 * passed into #dmxMapInsert (i.e., a value from the XI_* list in
106 * include/extensions/XIproto.h). If a mapping is not available, -1 is
107 * returned. */
108 int
dmxMapLookup(DMXLocalInputInfoPtr dmxLocal,int remoteEvent)109 dmxMapLookup(DMXLocalInputInfoPtr dmxLocal, int remoteEvent)
110 {
111 int hash = remoteEvent & DMX_MAP_MASK;
112 int serverEvent = -1;
113 int i;
114
115 if (dmxLocal->mapOptimize && dmxLocal->map[hash].remote == remoteEvent) {
116 serverEvent = dmxLocal->map[hash].server;
117 }
118 else {
119 for (i = 0; i < DMX_MAP_ENTRIES; i++)
120 if (dmxLocal->map[i].remote == remoteEvent) {
121 serverEvent = dmxLocal->map[hash].server;
122 break;
123 }
124 }
125
126 return serverEvent;
127 }
128