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 static int get_keysym(const char *name)
  26 {
  27     const name2keysym_t *p;
  28     for(p = name2keysym; p->name != NULL; p++) {
  29         if (!strcmp(p->name, name))
  30             return p->keysym;
  31     }
  32     return 0;
  33 }
  34
  35 struct key_range {
  36     int start;
  37     int end;
  38     struct key_range *next;
  39 };
  40
  41 #define MAX_NORMAL_KEYCODE 512
  42 #define MAX_EXTRA_COUNT 256
  43 typedef struct {
  44     uint16_t keysym2keycode[MAX_NORMAL_KEYCODE];
  45     struct {
  46         int keysym;
  47         uint16_t keycode;
  48     } keysym2keycode_extra[MAX_EXTRA_COUNT];
  49     int extra_count;
  50     struct key_range *keypad_range;
  51     struct key_range *numlock_range;
  52 } kbd_layout_t;
  53
  54 static void add_to_key_range(struct key_range **krp, int code) {
  55     struct key_range *kr;
  56     for (kr = *krp; kr; kr = kr->next) {
  57         if (code >= kr->start && code <= kr->end)
  58             break;
  59         if (code == kr->start - 1) {
  60             kr->start--;
  61             break;
  62         }
  63         if (code == kr->end + 1) {
  64             kr->end++;
  65             break;
  66         }
  67     }
  68     if (kr == NULL) {
  69         kr = qemu_mallocz(sizeof(*kr));
  70         kr->start = kr->end = code;
  71         kr->next = *krp;
  72         *krp = kr;
  73     }
  74 }
  75
  76 static kbd_layout_t *parse_keyboard_layout(const char *language,
  77                                            kbd_layout_t * k)
  78 {
  79     FILE *f;
  80     char file_name[1024];
  81     char line[1024];
  82     int len;
  83
  84     snprintf(file_name, sizeof(file_name),
  85              "%s/keymaps/%s", bios_dir, language);
  86
  87     if (!k)
  88         k = qemu_mallocz(sizeof(kbd_layout_t));
  89     if (!(f = fopen(file_name, "r"))) {
  90         fprintf(stderr,
  91                 "Could not read keymap file: '%s'\n", file_name);
  92         return 0;
  93     }
  94     for(;;) {
  95         if (fgets(line, 1024, f) == NULL)
  96             break;
  97         len = strlen(line);
  98         if (len > 0 && line[len - 1] == '\n')
  99             line[len - 1] = '\0';
 100         if (line[0] == '#')
 101             continue;
 102         if (!strncmp(line, "map ", 4))
 103             continue;
 104         if (!strncmp(line, "include ", 8)) {
 105             parse_keyboard_layout(line + 8, k);
 106         } else {
 107             char *end_of_keysym = line;
 108             while (*end_of_keysym != 0 && *end_of_keysym != ' ')
 109                 end_of_keysym++;
 110             if (*end_of_keysym) {
 111                 int keysym;
 112                 *end_of_keysym = 0;
 113                 keysym = get_keysym(line);
 114                 if (keysym == 0) {
 115                     //              fprintf(stderr, "Warning: unknown keysym %s\n", line);
 116                 } else {
 117                     const char *rest = end_of_keysym + 1;
 118                     char *rest2;
 119                     int keycode = strtol(rest, &rest2, 0);
 120
 121                     if (rest && strstr(rest, "numlock")) {
 122                         add_to_key_range(&k->keypad_range, keycode);
 123                         add_to_key_range(&k->numlock_range, keysym);
 124                         //fprintf(stderr, "keypad keysym %04x keycode %d\n", keysym, keycode);
 125                     }
 126
 127                     /* if(keycode&0x80)
 128                        keycode=(keycode<<8)^0x80e0; */
 129                     if (keysym < MAX_NORMAL_KEYCODE) {
 130                         //fprintf(stderr,"Setting keysym %s (%d) to %d\n",line,keysym,keycode);
 131                         k->keysym2keycode[keysym] = keycode;
 132                     } else {
 133                         if (k->extra_count >= MAX_EXTRA_COUNT) {
 134                             fprintf(stderr,
 135                                     "Warning: Could not assign keysym %s (0x%x) because of memory constraints.\n",
 136                                     line, keysym);
 137                         } else {
 138 #if 0
 139                             fprintf(stderr, "Setting %d: %d,%d\n",
 140                                     k->extra_count, keysym, keycode);
 141 #endif
 142                             k->keysym2keycode_extra[k->extra_count].
 143                                 keysym = keysym;
 144                             k->keysym2keycode_extra[k->extra_count].
 145                                 keycode = keycode;
 146                             k->extra_count++;
 147                         }
 148                     }
 149                 }
 150             }
 151         }
 152     }
 153     fclose(f);
 154     return k;
 155 }
 156
 157 static void *init_keyboard_layout(const char *language)
 158 {
 159     return parse_keyboard_layout(language, 0);
 160 }
 161
 162 static int keysym2scancode(void *kbd_layout, int keysym)
 163 {
 164     kbd_layout_t *k = kbd_layout;
 165     if (keysym < MAX_NORMAL_KEYCODE) {
 166         if (k->keysym2keycode[keysym] == 0)
 167             fprintf(stderr, "Warning: no scancode found for keysym %d\n",
 168                     keysym);
 169         return k->keysym2keycode[keysym];
 170     } else {
 171         int i;
 172 #ifdef XK_ISO_Left_Tab
 173         if (keysym == XK_ISO_Left_Tab)
 174             keysym = XK_Tab;
 175 #endif
 176         for (i = 0; i < k->extra_count; i++)
 177             if (k->keysym2keycode_extra[i].keysym == keysym)
 178                 return k->keysym2keycode_extra[i].keycode;
 179     }
 180     return 0;
 181 }
 182
 183 static inline int keycode_is_keypad(void *kbd_layout, int keycode)
 184 {
 185     kbd_layout_t *k = kbd_layout;
 186     struct key_range *kr;
 187
 188     for (kr = k->keypad_range; kr; kr = kr->next)
 189         if (keycode >= kr->start && keycode <= kr->end)
 190             return 1;
 191     return 0;
 192 }
 193
 194 static inline int keysym_is_numlock(void *kbd_layout, int keysym)
 195 {
 196     kbd_layout_t *k = kbd_layout;
 197     struct key_range *kr;
 198
 199     for (kr = k->numlock_range; kr; kr = kr->next)
 200         if (keysym >= kr->start && keysym <= kr->end)
 201             return 1;
 202     return 0;
 203 }