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 "keymaps.h"
  26 #include "sysemu.h"
  27
  28 static int get_keysym(const name2keysym_t *table,
  29                       const char *name)
  30 {
  31     const name2keysym_t *p;
  32     for(p = table; p->name != NULL; p++) {
  33         if (!strcmp(p->name, name))
  34             return p->keysym;
  35     }
  36     return 0;
  37 }
  38
  39
  40 static void add_to_key_range(struct key_range **krp, int code) {
  41     struct key_range *kr;
  42     for (kr = *krp; kr; kr = kr->next) {
  43         if (code >= kr->start && code <= kr->end)
  44             break;
  45         if (code == kr->start - 1) {
  46             kr->start--;
  47             break;
  48         }
  49         if (code == kr->end + 1) {
  50             kr->end++;
  51             break;
  52         }
  53     }
  54     if (kr == NULL) {
  55         kr = qemu_mallocz(sizeof(*kr));
  56         kr->start = kr->end = code;
  57         kr->next = *krp;
  58         *krp = kr;
  59     }
  60 }
  61
  62 static void add_keysym(char *line, int keysym, int keycode, kbd_layout_t *k) {
  63     if (keysym < MAX_NORMAL_KEYCODE) {
  64         //fprintf(stderr,"Setting keysym %s (%d) to %d\n",line,keysym,keycode);
  65         k->keysym2keycode[keysym] = keycode;
  66     } else {
  67         if (k->extra_count >= MAX_EXTRA_COUNT) {
  68             fprintf(stderr,
  69                     "Warning: Could not assign keysym %s (0x%x) because of memory constraints.\n",
  70                     line, keysym);
  71         } else {
  72 #if 0
  73             fprintf(stderr, "Setting %d: %d,%d\n",
  74                     k->extra_count, keysym, keycode);
  75 #endif
  76             k->keysym2keycode_extra[k->extra_count].
  77                 keysym = keysym;
  78             k->keysym2keycode_extra[k->extra_count].
  79                 keycode = keycode;
  80             k->extra_count++;
  81         }
  82     }
  83 }
  84
  85 static kbd_layout_t *parse_keyboard_layout(const name2keysym_t *table,
  86                                            const char *language,
  87                                            kbd_layout_t * k)
  88 {
  89     FILE *f;
  90     char * filename;
  91     char line[1024];
  92     int len;
  93
  94     filename = qemu_find_file(QEMU_FILE_TYPE_KEYMAP, language);
  95
  96     if (!k)
  97         k = qemu_mallocz(sizeof(kbd_layout_t));
  98     if (!(filename && (f = fopen(filename, "r")))) {
  99         fprintf(stderr,
 100                 "Could not read keymap file: '%s'\n", language);
 101         return NULL;
 102     }
 103     qemu_free(filename);
 104     for(;;) {
 105         if (fgets(line, 1024, f) == NULL)
 106             break;
 107         len = strlen(line);
 108         if (len > 0 && line[len - 1] == '\n')
 109             line[len - 1] = '\0';
 110         if (line[0] == '#')
 111             continue;
 112         if (!strncmp(line, "map ", 4))
 113             continue;
 114         if (!strncmp(line, "include ", 8)) {
 115             parse_keyboard_layout(table, line + 8, k);
 116         } else {
 117             char *end_of_keysym = line;
 118             while (*end_of_keysym != 0 && *end_of_keysym != ' ')
 119                 end_of_keysym++;
 120             if (*end_of_keysym) {
 121                 int keysym;
 122                 *end_of_keysym = 0;
 123                 keysym = get_keysym(table, line);
 124                 if (keysym == 0) {
 125                     //              fprintf(stderr, "Warning: unknown keysym %s\n", line);
 126                 } else {
 127                     const char *rest = end_of_keysym + 1;
 128                     char *rest2;
 129                     int keycode = strtol(rest, &rest2, 0);
 130
 131                     if (rest && strstr(rest, "numlock")) {
 132                         add_to_key_range(&k->keypad_range, keycode);
 133                         add_to_key_range(&k->numlock_range, keysym);
 134                         //fprintf(stderr, "keypad keysym %04x keycode %d\n", keysym, keycode);
 135                     }
 136
 137                     if (rest && strstr(rest, "shift"))
 138                         keycode |= SCANCODE_SHIFT;
 139                     if (rest && strstr(rest, "altgr"))
 140                         keycode |= SCANCODE_ALTGR;
 141                     if (rest && strstr(rest, "ctrl"))
 142                         keycode |= SCANCODE_CTRL;
 143
 144                     add_keysym(line, keysym, keycode, k);
 145
 146                     if (rest && strstr(rest, "addupper")) {
 147                         char *c;
 148                         for (c = line; *c; c++)
 149                             *c = toupper(*c);
 150                         keysym = get_keysym(table, line);
 151                         if (keysym)
 152                             add_keysym(line, keysym, keycode | SCANCODE_SHIFT, k);
 153                     }
 154                 }
 155             }
 156         }
 157     }
 158     fclose(f);
 159     return k;
 160 }
 161
 162
 163 void *init_keyboard_layout(const name2keysym_t *table, const char *language)
 164 {
 165     return parse_keyboard_layout(table, language, NULL);
 166 }
 167
 168
 169 int keysym2scancode(void *kbd_layout, int keysym)
 170 {
 171     kbd_layout_t *k = kbd_layout;
 172     if (keysym < MAX_NORMAL_KEYCODE) {
 173         if (k->keysym2keycode[keysym] == 0)
 174             fprintf(stderr, "Warning: no scancode found for keysym %d\n",
 175                     keysym);
 176         return k->keysym2keycode[keysym];
 177     } else {
 178         int i;
 179 #ifdef XK_ISO_Left_Tab
 180         if (keysym == XK_ISO_Left_Tab)
 181             keysym = XK_Tab;
 182 #endif
 183         for (i = 0; i < k->extra_count; i++)
 184             if (k->keysym2keycode_extra[i].keysym == keysym)
 185                 return k->keysym2keycode_extra[i].keycode;
 186     }
 187     return 0;
 188 }
 189
 190 int keycode_is_keypad(void *kbd_layout, int keycode)
 191 {
 192     kbd_layout_t *k = kbd_layout;
 193     struct key_range *kr;
 194
 195     for (kr = k->keypad_range; kr; kr = kr->next)
 196         if (keycode >= kr->start && keycode <= kr->end)
 197             return 1;
 198     return 0;
 199 }
 200
 201 int keysym_is_numlock(void *kbd_layout, int keysym)
 202 {
 203     kbd_layout_t *k = kbd_layout;
 204     struct key_range *kr;
 205
 206     for (kr = k->numlock_range; kr; kr = kr->next)
 207         if (keysym >= kr->start && keysym <= kr->end)
 208             return 1;
 209     return 0;
 210 }