ui/keymaps.c

   1 /*
   2  * QEMU keysym to keycode conversion using rdesktop keymaps
   3  *
   4  * Copyright (c) 2004 Johannes Schindelin
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "keymaps.h"
  27 #include "sysemu/sysemu.h"
  28 #include "trace.h"
  29
  30 static int get_keysym(const name2keysym_t *table,
  31                       const char *name)
  32 {
  33     const name2keysym_t *p;
  34     for(p = table; p->name != NULL; p++) {
  35         if (!strcmp(p->name, name)) {
  36             return p->keysym;
  37         }
  38     }
  39     if (name[0] == 'U' && strlen(name) == 5) { /* try unicode Uxxxx */
  40         char *end;
  41         int ret = (int)strtoul(name + 1, &end, 16);
  42         if (*end == '\0' && ret > 0) {
  43             return ret;
  44         }
  45     }
  46     return 0;
  47 }
  48
  49
  50 static void add_to_key_range(struct key_range **krp, int code) {
  51     struct key_range *kr;
  52     for (kr = *krp; kr; kr = kr->next) {
  53         if (code >= kr->start && code <= kr->end) {
  54             break;
  55         }
  56         if (code == kr->start - 1) {
  57             kr->start--;
  58             break;
  59         }
  60         if (code == kr->end + 1) {
  61             kr->end++;
  62             break;
  63         }
  64     }
  65     if (kr == NULL) {
  66         kr = g_malloc0(sizeof(*kr));
  67         kr->start = kr->end = code;
  68         kr->next = *krp;
  69         *krp = kr;
  70     }
  71 }
  72
  73 static void add_keysym(char *line, int keysym, int keycode, kbd_layout_t *k) {
  74     if (keysym < MAX_NORMAL_KEYCODE) {
  75         trace_keymap_add("normal", keysym, keycode, line);
  76         k->keysym2keycode[keysym] = keycode;
  77     } else {
  78         if (k->extra_count >= MAX_EXTRA_COUNT) {
  79             fprintf(stderr, "Warning: Could not assign keysym %s (0x%x)"
  80                     " because of memory constraints.\n", line, keysym);
  81         } else {
  82             trace_keymap_add("extra", keysym, keycode, line);
  83             k->keysym2keycode_extra[k->extra_count].
  84             keysym = keysym;
  85             k->keysym2keycode_extra[k->extra_count].
  86             keycode = keycode;
  87             k->extra_count++;
  88         }
  89     }
  90 }
  91
  92 static kbd_layout_t *parse_keyboard_layout(const name2keysym_t *table,
  93                                            const char *language,
  94                                            kbd_layout_t *k)
  95 {
  96     FILE *f;
  97     char * filename;
  98     char line[1024];
  99     char keyname[64];
 100     int len;
 101
 102     filename = qemu_find_file(QEMU_FILE_TYPE_KEYMAP, language);
 103     trace_keymap_parse(filename);
 104     f = filename ? fopen(filename, "r") : NULL;
 105     g_free(filename);
 106     if (!f) {
 107         fprintf(stderr, "Could not read keymap file: '%s'\n", language);
 108         return NULL;
 109     }
 110
 111     if (!k) {
 112         k = g_new0(kbd_layout_t, 1);
 113     }
 114
 115     for(;;) {
 116         if (fgets(line, 1024, f) == NULL) {
 117             break;
 118         }
 119         len = strlen(line);
 120         if (len > 0 && line[len - 1] == '\n') {
 121             line[len - 1] = '\0';
 122         }
 123         if (line[0] == '#') {
 124             continue;
 125         }
 126         if (!strncmp(line, "map ", 4)) {
 127             continue;
 128         }
 129         if (!strncmp(line, "include ", 8)) {
 130             parse_keyboard_layout(table, line + 8, k);
 131         } else {
 132             int offset = 0;
 133             while (line[offset] != 0 &&
 134                    line[offset] != ' ' &&
 135                    offset < sizeof(keyname) - 1) {
 136                 keyname[offset] = line[offset];
 137                 offset++;
 138             }
 139             keyname[offset] = 0;
 140             if (strlen(keyname)) {
 141                 int keysym;
 142                 keysym = get_keysym(table, keyname);
 143                 if (keysym == 0) {
 144                     /* fprintf(stderr, "Warning: unknown keysym %s\n", line);*/
 145                 } else {
 146                     const char *rest = line + offset + 1;
 147                     int keycode = strtol(rest, NULL, 0);
 148
 149                     if (strstr(rest, "numlock")) {
 150                         add_to_key_range(&k->keypad_range, keycode);
 151                         add_to_key_range(&k->numlock_range, keysym);
 152                         /* fprintf(stderr, "keypad keysym %04x keycode %d\n",
 153                                    keysym, keycode); */
 154                     }
 155
 156                     if (strstr(rest, "shift")) {
 157                         keycode |= SCANCODE_SHIFT;
 158                     }
 159                     if (strstr(rest, "altgr")) {
 160                         keycode |= SCANCODE_ALTGR;
 161                     }
 162                     if (strstr(rest, "ctrl")) {
 163                         keycode |= SCANCODE_CTRL;
 164                     }
 165
 166                     add_keysym(line, keysym, keycode, k);
 167
 168                     if (strstr(rest, "addupper")) {
 169                         char *c;
 170                         for (c = keyname; *c; c++) {
 171                             *c = qemu_toupper(*c);
 172                         }
 173                         keysym = get_keysym(table, keyname);
 174                         if (keysym) {
 175                             add_keysym(line, keysym,
 176                                        keycode | SCANCODE_SHIFT, k);
 177                         }
 178                     }
 179                 }
 180             }
 181         }
 182     }
 183     fclose(f);
 184     return k;
 185 }
 186
 187
 188 void *init_keyboard_layout(const name2keysym_t *table, const char *language)
 189 {
 190     return parse_keyboard_layout(table, language, NULL);
 191 }
 192
 193
 194 int keysym2scancode(void *kbd_layout, int keysym)
 195 {
 196     kbd_layout_t *k = kbd_layout;
 197     if (keysym < MAX_NORMAL_KEYCODE) {
 198         if (k->keysym2keycode[keysym] == 0) {
 199             trace_keymap_unmapped(keysym);
 200             fprintf(stderr, "Warning: no scancode found for keysym %d\n",
 201                     keysym);
 202         }
 203         return k->keysym2keycode[keysym];
 204     } else {
 205         int i;
 206 #ifdef XK_ISO_Left_Tab
 207         if (keysym == XK_ISO_Left_Tab) {
 208             keysym = XK_Tab;
 209         }
 210 #endif
 211         for (i = 0; i < k->extra_count; i++) {
 212             if (k->keysym2keycode_extra[i].keysym == keysym) {
 213                 return k->keysym2keycode_extra[i].keycode;
 214             }
 215         }
 216     }
 217     return 0;
 218 }
 219
 220 int keycode_is_keypad(void *kbd_layout, int keycode)
 221 {
 222     kbd_layout_t *k = kbd_layout;
 223     struct key_range *kr;
 224
 225     for (kr = k->keypad_range; kr; kr = kr->next) {
 226         if (keycode >= kr->start && keycode <= kr->end) {
 227             return 1;
 228         }
 229     }
 230     return 0;
 231 }
 232
 233 int keysym_is_numlock(void *kbd_layout, int keysym)
 234 {
 235     kbd_layout_t *k = kbd_layout;
 236     struct key_range *kr;
 237
 238     for (kr = k->numlock_range; kr; kr = kr->next) {
 239         if (keysym >= kr->start && keysym <= kr->end) {
 240             return 1;
 241         }
 242     }
 243     return 0;
 244 }