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 "xkbcomp-priv.h"
28 #include "text.h"
29 #include "expr.h"
30 #include "vmod.h"
31
32 bool
HandleVModDef(struct xkb_context * ctx,struct xkb_mod_set * mods,VModDef * stmt,enum merge_mode merge)33 HandleVModDef(struct xkb_context *ctx, struct xkb_mod_set *mods,
34 VModDef *stmt, enum merge_mode merge)
35 {
36 xkb_mod_index_t i;
37 struct xkb_mod *mod;
38 xkb_mod_mask_t mapping;
39
40 merge = (merge == MERGE_DEFAULT ? stmt->merge : merge);
41
42 if (stmt->value) {
43 /*
44 * This is a statement such as 'virtualModifiers NumLock = Mod1';
45 * it sets the vmod-to-real-mod[s] mapping directly instead of going
46 * through modifier_map or some such.
47 */
48 if (!ExprResolveModMask(ctx, stmt->value, MOD_REAL, mods, &mapping)) {
49 log_err(ctx,
50 "Declaration of %s ignored\n",
51 xkb_atom_text(ctx, stmt->name));
52 return false;
53 }
54 }
55 else {
56 mapping = 0;
57 }
58
59 xkb_mods_enumerate(i, mod, mods) {
60 if (mod->name == stmt->name) {
61 if (mod->type != MOD_VIRT) {
62 log_err(ctx,
63 "Can't add a virtual modifier named \"%s\"; "
64 "there is already a non-virtual modifier with this name! Ignored\n",
65 xkb_atom_text(ctx, mod->name));
66 return false;
67 }
68
69 if (mod->mapping == mapping)
70 return true;
71
72 if (mod->mapping != 0) {
73 xkb_mod_mask_t use, ignore;
74
75 use = (merge == MERGE_OVERRIDE ? mapping : mod->mapping);
76 ignore = (merge == MERGE_OVERRIDE ? mod->mapping : mapping);
77
78 log_warn(ctx,
79 "Virtual modifier %s defined multiple times; "
80 "Using %s, ignoring %s\n",
81 xkb_atom_text(ctx, stmt->name),
82 ModMaskText(ctx, mods, use),
83 ModMaskText(ctx, mods, ignore));
84
85 mapping = use;
86 }
87
88 mod->mapping = mapping;
89 return true;
90 }
91 }
92
93 if (mods->num_mods >= XKB_MAX_MODS) {
94 log_err(ctx,
95 "Too many modifiers defined (maximum %d)\n",
96 XKB_MAX_MODS);
97 return false;
98 }
99
100 mods->mods[mods->num_mods].name = stmt->name;
101 mods->mods[mods->num_mods].type = MOD_VIRT;
102 mods->mods[mods->num_mods].mapping = mapping;
103 mods->num_mods++;
104 return true;
105 }
106