Dogcows Code - chaz/openbox/blob - obt/keyboard.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    obt/keyboard.c for the Openbox window manager
   4    Copyright (c) 2007        Dana Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include "obt/display.h"
  20 #include "obt/keyboard.h"
  21
  22 #include <X11/Xlib.h>
  23 #include <X11/keysym.h>
  24
  25 /* These masks are constants and the modifier keys are bound to them as
  26    anyone sees fit:
  27         ShiftMask (1<<0), LockMask (1<<1), ControlMask (1<<2), Mod1Mask (1<<3),
  28         Mod2Mask (1<<4), Mod3Mask (1<<5), Mod4Mask (1<<6), Mod5Mask (1<<7)
  29 */
  30 #define NUM_MASKS 8
  31 #define ALL_MASKS 0xff /* an or'ing of all 8 keyboard masks */
  32
  33 /* Get the bitflag for the n'th modifier mask */
  34 #define nth_mask(n) (1 << n)
  35
  36 static void set_modkey_mask(guchar mask, KeySym sym);
  37 void obt_keyboard_shutdown();
  38
  39 static XModifierKeymap *modmap;
  40 static KeySym *keymap;
  41 static gint min_keycode, max_keycode, keysyms_per_keycode;
  42 /* This is a bitmask of the different masks for each modifier key */
  43 static guchar modkeys_keys[OBT_KEYBOARD_NUM_MODKEYS];
  44
  45 static gboolean alt_l = FALSE;
  46 static gboolean meta_l = FALSE;
  47 static gboolean super_l = FALSE;
  48 static gboolean hyper_l = FALSE;
  49
  50 static gboolean started = FALSE;
  51
  52 void obt_keyboard_reload(void)
  53 {
  54     gint i, j, k;
  55
  56     if (started) obt_keyboard_shutdown(); /* free stuff */
  57     started = TRUE;
  58
  59     /* reset the keys to not be bound to any masks */
  60     for (i = 0; i < OBT_KEYBOARD_NUM_MODKEYS; ++i)
  61         modkeys_keys[i] = 0;
  62
  63     modmap = XGetModifierMapping(obt_display);
  64     /* note: modmap->max_keypermod can be 0 when there is no valid key layout
  65        available */
  66
  67     XDisplayKeycodes(obt_display, &min_keycode, &max_keycode);
  68     keymap = XGetKeyboardMapping(obt_display, min_keycode,
  69                                  max_keycode - min_keycode + 1,
  70                                  &keysyms_per_keycode);
  71
  72     alt_l = meta_l = super_l = hyper_l = FALSE;
  73
  74     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
  75     for (i = 0; i < NUM_MASKS; ++i) {
  76         /* go through each keycode that is bound to the mask */
  77         for (j = 0; j < modmap->max_keypermod; ++j) {
  78             KeySym sym;
  79             /* get a keycode that is bound to the mask (i) */
  80             KeyCode keycode = modmap->modifiermap[i*modmap->max_keypermod + j];
  81             if (keycode) {
  82                 /* go through each keysym bound to the given keycode */
  83                 for (k = 0; k < keysyms_per_keycode; ++k) {
  84                     sym = keymap[(keycode-min_keycode) * keysyms_per_keycode +
  85                                  k];
  86                     if (sym != NoSymbol) {
  87                         /* bind the key to the mask (e.g. Alt_L => Mod1Mask) */
  88                         set_modkey_mask(nth_mask(i), sym);
  89                     }
  90                 }
  91             }
  92         }
  93     }
  94
  95     /* CapsLock, Shift, and Control are special and hard-coded */
  96     modkeys_keys[OBT_KEYBOARD_MODKEY_CAPSLOCK] = LockMask;
  97     modkeys_keys[OBT_KEYBOARD_MODKEY_SHIFT] = ShiftMask;
  98     modkeys_keys[OBT_KEYBOARD_MODKEY_CONTROL] = ControlMask;
  99 }
 100
 101 void obt_keyboard_shutdown(void)
 102 {
 103     XFreeModifiermap(modmap);
 104     modmap = NULL;
 105     XFree(keymap);
 106     keymap = NULL;
 107     started = FALSE;
 108 }
 109
 110 guint obt_keyboard_keycode_to_modmask(guint keycode)
 111 {
 112     gint i, j;
 113     guint mask = 0;
 114
 115     if (keycode == NoSymbol) return 0;
 116
 117     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
 118     for (i = 0; i < NUM_MASKS; ++i) {
 119         /* go through each keycode that is bound to the mask */
 120         for (j = 0; j < modmap->max_keypermod; ++j) {
 121             /* compare with a keycode that is bound to the mask (i) */
 122             if (modmap->modifiermap[i*modmap->max_keypermod + j] == keycode)
 123                 mask |= nth_mask(i);
 124         }
 125     }
 126     return mask;
 127 }
 128
 129 guint obt_keyboard_only_modmasks(guint mask)
 130 {
 131     mask &= ALL_MASKS;
 132     /* strip off these lock keys. they shouldn't affect key bindings */
 133     mask &= ~LockMask; /* use the LockMask, not what capslock is bound to,
 134                           because you could bind it to something else and it
 135                           should work as that modifier then. i think capslock
 136                           is weird in xkb. */
 137     mask &= ~obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_NUMLOCK);
 138     mask &= ~obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_SCROLLLOCK);
 139     return mask;
 140 }
 141
 142 guint obt_keyboard_modkey_to_modmask(ObtModkeysKey key)
 143 {
 144     return modkeys_keys[key];
 145 }
 146
 147 static void set_modkey_mask(guchar mask, KeySym sym)
 148 {
 149     /* find what key this is, and bind it to the mask */
 150
 151     if (sym == XK_Num_Lock)
 152         modkeys_keys[OBT_KEYBOARD_MODKEY_NUMLOCK] |= mask;
 153     else if (sym == XK_Scroll_Lock)
 154         modkeys_keys[OBT_KEYBOARD_MODKEY_SCROLLLOCK] |= mask;
 155
 156     else if (sym == XK_Super_L && super_l)
 157         modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] |= mask;
 158     else if (sym == XK_Super_L && !super_l)
 159         /* left takes precident over right, so erase any masks the right
 160            key may have set */
 161         modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] = mask, super_l = TRUE;
 162     else if (sym == XK_Super_R && !super_l)
 163         modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] |= mask;
 164
 165     else if (sym == XK_Hyper_L && hyper_l)
 166         modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] |= mask;
 167     else if (sym == XK_Hyper_L && !hyper_l)
 168         modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] = mask, hyper_l = TRUE;
 169     else if (sym == XK_Hyper_R && !hyper_l)
 170         modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] |= mask;
 171
 172     else if (sym == XK_Alt_L && alt_l)
 173         modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] |= mask;
 174     else if (sym == XK_Alt_L && !alt_l)
 175         modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] = mask, alt_l = TRUE;
 176     else if (sym == XK_Alt_R && !alt_l)
 177         modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] |= mask;
 178
 179     else if (sym == XK_Meta_L && meta_l)
 180         modkeys_keys[OBT_KEYBOARD_MODKEY_META] |= mask;
 181     else if (sym == XK_Meta_L && !meta_l)
 182         modkeys_keys[OBT_KEYBOARD_MODKEY_META] = mask, meta_l = TRUE;
 183     else if (sym == XK_Meta_R && !meta_l)
 184         modkeys_keys[OBT_KEYBOARD_MODKEY_META] |= mask;
 185
 186     /* CapsLock, Shift, and Control are special and hard-coded */
 187 }
 188
 189 KeyCode* obt_keyboard_keysym_to_keycode(KeySym sym)
 190 {
 191     KeyCode *ret;
 192     gint i, j, n;
 193
 194     ret = g_new(KeyCode, 1);
 195     n = 0;
 196     ret[n] = 0;
 197
 198     /* go through each keycode and look for the keysym */
 199     for (i = min_keycode; i <= max_keycode; ++i)
 200         for (j = 0; j < keysyms_per_keycode; ++j)
 201             if (sym == keymap[(i-min_keycode) * keysyms_per_keycode + j]) {
 202                 ret = g_renew(KeyCode, ret, ++n);
 203                 ret[n-1] = i;
 204                 ret[n] = 0;
 205             }
 206     return ret;
 207 }
 208
 209 gchar *obt_keyboard_keycode_to_string(guint keycode)
 210 {
 211     KeySym sym;
 212
 213     if ((sym = XKeycodeToKeysym(obt_display, keycode, 0)) != NoSymbol)
 214         return g_locale_to_utf8(XKeysymToString(sym), -1, NULL, NULL, NULL);
 215     return NULL;
 216 }
 217
 218 gunichar obt_keyboard_keycode_to_unichar(guint keycode)
 219 {
 220     gunichar unikey = 0;
 221     char *key;
 222
 223     if ((key = obt_keyboard_keycode_to_string(keycode)) != NULL &&
 224         /* don't accept keys that aren't a single letter, like "space" */
 225         key[1] == '\0')
 226     {
 227         unikey = g_utf8_get_char_validated(key, -1);
 228         if (unikey == (gunichar)-1 || unikey == (gunichar)-2 || unikey == 0)
 229             unikey = 0;
 230     }
 231     g_free(key);
 232     return unikey;
 233 }