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         if (kr) {
  71             kr->start = kr->end = code;
  72             kr->next = *krp;
  73             *krp = kr;
  74         }
  75     }
  76 }
  77
  78 static kbd_layout_t *parse_keyboard_layout(const char *language,
  79                                            kbd_layout_t * k)
  80 {
  81     FILE *f;
  82     char file_name[1024];
  83     char line[1024];
  84     int len;
  85
  86     snprintf(file_name, sizeof(file_name),
  87              "%s/keymaps/%s", bios_dir, language);
  88
  89     if (!k)
  90         k = qemu_mallocz(sizeof(kbd_layout_t));
  91     if (!k)
  92         return 0;
  93     if (!(f = fopen(file_name, "r"))) {
  94         fprintf(stderr,
  95                 "Could not read keymap file: '%s'\n", file_name);
  96         return 0;
  97     }
  98     for(;;) {
  99         if (fgets(line, 1024, f) == NULL)
 100             break;
 101         len = strlen(line);
 102         if (len > 0 && line[len - 1] == '\n')
 103             line[len - 1] = '\0';
 104         if (line[0] == '#')
 105             continue;
 106         if (!strncmp(line, "map ", 4))
 107             continue;
 108         if (!strncmp(line, "include ", 8)) {
 109             parse_keyboard_layout(line + 8, k);
 110         } else {
 111             char *end_of_keysym = line;
 112             while (*end_of_keysym != 0 && *end_of_keysym != ' ')
 113                 end_of_keysym++;
 114             if (*end_of_keysym) {
 115                 int keysym;
 116                 *end_of_keysym = 0;
 117                 keysym = get_keysym(line);
 118                 if (keysym == 0) {
 119                     //              fprintf(stderr, "Warning: unknown keysym %s\n", line);
 120                 } else {
 121                     const char *rest = end_of_keysym + 1;
 122                     char *rest2;
 123                     int keycode = strtol(rest, &rest2, 0);
 124
 125                     if (rest && strstr(rest, "numlock")) {
 126                         add_to_key_range(&k->keypad_range, keycode);
 127                         add_to_key_range(&k->numlock_range, keysym);
 128                         //fprintf(stderr, "keypad keysym %04x keycode %d\n", keysym, keycode);
 129                     }
 130
 131                     /* if(keycode&0x80)
 132                        keycode=(keycode<<8)^0x80e0; */
 133                     if (keysym < MAX_NORMAL_KEYCODE) {
 134                         //fprintf(stderr,"Setting keysym %s (%d) to %d\n",line,keysym,keycode);
 135                         k->keysym2keycode[keysym] = keycode;
 136                     } else {
 137                         if (k->extra_count >= MAX_EXTRA_COUNT) {
 138                             fprintf(stderr,
 139                                     "Warning: Could not assign keysym %s (0x%x) because of memory constraints.\n",
 140                                     line, keysym);
 141                         } else {
 142 #if 0
 143                             fprintf(stderr, "Setting %d: %d,%d\n",
 144                                     k->extra_count, keysym, keycode);
 145 #endif
 146                             k->keysym2keycode_extra[k->extra_count].
 147                                 keysym = keysym;
 148                             k->keysym2keycode_extra[k->extra_count].
 149                                 keycode = keycode;
 150                             k->extra_count++;
 151                         }
 152                     }
 153                 }
 154             }
 155         }
 156     }
 157     fclose(f);
 158     return k;
 159 }
 160
 161 static void *init_keyboard_layout(const char *language)
 162 {
 163     return parse_keyboard_layout(language, 0);
 164 }
 165
 166 static int keysym2scancode(void *kbd_layout, int keysym)
 167 {
 168     kbd_layout_t *k = kbd_layout;
 169     if (keysym < MAX_NORMAL_KEYCODE) {
 170         if (k->keysym2keycode[keysym] == 0)
 171             fprintf(stderr, "Warning: no scancode found for keysym %d\n",
 172                     keysym);
 173         return k->keysym2keycode[keysym];
 174     } else {
 175         int i;
 176 #ifdef XK_ISO_Left_Tab
 177         if (keysym == XK_ISO_Left_Tab)
 178             keysym = XK_Tab;
 179 #endif
 180         for (i = 0; i < k->extra_count; i++)
 181             if (k->keysym2keycode_extra[i].keysym == keysym)
 182                 return k->keysym2keycode_extra[i].keycode;
 183     }
 184     return 0;
 185 }
 186
 187 static inline int keycode_is_keypad(void *kbd_layout, int keycode)
 188 {
 189     kbd_layout_t *k = kbd_layout;
 190     struct key_range *kr;
 191
 192     for (kr = k->keypad_range; kr; kr = kr->next)
 193         if (keycode >= kr->start && keycode <= kr->end)
 194             return 1;
 195     return 0;
 196 }
 197
 198 static inline int keysym_is_numlock(void *kbd_layout, int keysym)
 199 {
 200     kbd_layout_t *k = kbd_layout;
 201     struct key_range *kr;
 202
 203     for (kr = k->numlock_range; kr; kr = kr->next)
 204         if (keysym >= kr->start && keysym <= kr->end)
 205             return 1;
 206     return 0;
 207 }