1 /************************************************************
2 * Copyright (c) 1994 by Silicon Graphics Computer Systems, Inc.
3 *
4 * Permission to use, copy, modify, and distribute this
5 * software and its documentation for any purpose and without
6 * fee is hereby granted, provided that the above copyright
7 * notice appear in all copies and that both that copyright
8 * notice and this permission notice appear in supporting
9 * documentation, and that the name of Silicon Graphics not be
10 * used in advertising or publicity pertaining to distribution
11 * of the software without specific prior written permission.
12 * Silicon Graphics makes no representation about the suitability
13 * of this software for any purpose. It is provided "as is"
14 * without any express or implied warranty.
15 *
16 * SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
17 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
19 * GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
20 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
21 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
22 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
23 * THE USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 ********************************************************/
26
27 #include "config.h"
28
29 #include "xkbcomp-priv.h"
30 #include "text.h"
31 #include "expr.h"
32 #include "vmod.h"
33
34 bool
HandleVModDef(struct xkb_context * ctx,struct xkb_mod_set * mods,VModDef * stmt,enum merge_mode merge)35 HandleVModDef(struct xkb_context *ctx, struct xkb_mod_set *mods,
36 VModDef *stmt, enum merge_mode merge)
37 {
38 xkb_mod_index_t i;
39 struct xkb_mod *mod;
40 xkb_mod_mask_t mapping;
41
42 merge = (merge == MERGE_DEFAULT ? stmt->merge : merge);
43
44 if (stmt->value) {
45 /*
46 * This is a statement such as 'virtualModifiers NumLock = Mod1';
47 * it sets the vmod-to-real-mod[s] mapping directly instead of going
48 * through modifier_map or some such.
49 */
50 if (!ExprResolveModMask(ctx, stmt->value, MOD_REAL, mods, &mapping)) {
51 log_err(ctx,
52 "Declaration of %s ignored\n",
53 xkb_atom_text(ctx, stmt->name));
54 return false;
55 }
56 }
57 else {
58 mapping = 0;
59 }
60
61 xkb_mods_enumerate(i, mod, mods) {
62 if (mod->name == stmt->name) {
63 if (mod->type != MOD_VIRT) {
64 log_err(ctx,
65 "Can't add a virtual modifier named \"%s\"; "
66 "there is already a non-virtual modifier with this name! Ignored\n",
67 xkb_atom_text(ctx, mod->name));
68 return false;
69 }
70
71 if (mod->mapping == mapping)
72 return true;
73
74 if (mod->mapping != 0) {
75 xkb_mod_mask_t use, ignore;
76
77 use = (merge == MERGE_OVERRIDE ? mapping : mod->mapping);
78 ignore = (merge == MERGE_OVERRIDE ? mod->mapping : mapping);
79
80 log_warn(ctx,
81 "Virtual modifier %s defined multiple times; "
82 "Using %s, ignoring %s\n",
83 xkb_atom_text(ctx, stmt->name),
84 ModMaskText(ctx, mods, use),
85 ModMaskText(ctx, mods, ignore));
86
87 mapping = use;
88 }
89
90 mod->mapping = mapping;
91 return true;
92 }
93 }
94
95 if (mods->num_mods >= XKB_MAX_MODS) {
96 log_err(ctx,
97 "Too many modifiers defined (maximum %d)\n",
98 XKB_MAX_MODS);
99 return false;
100 }
101
102 mods->mods[mods->num_mods].name = stmt->name;
103 mods->mods[mods->num_mods].type = MOD_VIRT;
104 mods->mods[mods->num_mods].mapping = mapping;
105 mods->num_mods++;
106 return true;
107 }
108