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     g_assert(modmap->max_keypermod > 0);
  65
  66     XDisplayKeycodes(obt_display, &min_keycode, &max_keycode);
  67     keymap = XGetKeyboardMapping(obt_display, min_keycode,
  68                                  max_keycode - min_keycode + 1,
  69                                  &keysyms_per_keycode);
  70
  71     alt_l = meta_l = super_l = hyper_l = FALSE;
  72
  73     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
  74     for (i = 0; i < NUM_MASKS; ++i) {
  75         /* go through each keycode that is bound to the mask */
  76         for (j = 0; j < modmap->max_keypermod; ++j) {
  77             KeySym sym;
  78             /* get a keycode that is bound to the mask (i) */
  79             KeyCode keycode = modmap->modifiermap[i*modmap->max_keypermod + j];
  80             if (keycode) {
  81                 /* go through each keysym bound to the given keycode */
  82                 for (k = 0; k < keysyms_per_keycode; ++k) {
  83                     sym = keymap[(keycode-min_keycode) * keysyms_per_keycode +
  84                                  k];
  85                     if (sym != NoSymbol) {
  86                         /* bind the key to the mask (e.g. Alt_L => Mod1Mask) */
  87                         set_modkey_mask(nth_mask(i), sym);
  88                     }
  89                 }
  90             }
  91         }
  92     }
  93
  94     /* CapsLock, Shift, and Control are special and hard-coded */
  95     modkeys_keys[OBT_KEYBOARD_MODKEY_CAPSLOCK] = LockMask;
  96     modkeys_keys[OBT_KEYBOARD_MODKEY_SHIFT] = ShiftMask;
  97     modkeys_keys[OBT_KEYBOARD_MODKEY_CONTROL] = ControlMask;
  98 }
  99
 100 void obt_keyboard_shutdown(void)
 101 {
 102     XFreeModifiermap(modmap);
 103     modmap = NULL;
 104     XFree(keymap);
 105     keymap = NULL;
 106     started = FALSE;
 107 }
 108
 109 guint obt_keyboard_keycode_to_modmask(guint keycode)
 110 {
 111     gint i, j;
 112     guint mask = 0;
 113
 114     if (keycode == NoSymbol) return 0;
 115
 116     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
 117     for (i = 0; i < NUM_MASKS; ++i) {
 118         /* go through each keycode that is bound to the mask */
 119         for (j = 0; j < modmap->max_keypermod; ++j) {
 120             /* compare with a keycode that is bound to the mask (i) */
 121             if (modmap->modifiermap[i*modmap->max_keypermod + j] == keycode)
 122                 mask |= nth_mask(i);
 123         }
 124     }
 125     return mask;
 126 }
 127
 128 guint obt_keyboard_only_modmasks(guint mask)
 129 {
 130     mask &= ALL_MASKS;
 131     /* strip off these lock keys. they shouldn't affect key bindings */
 132     mask &= ~LockMask; /* use the LockMask, not what capslock is bound to,
 133                           because you could bind it to something else and it
 134                           should work as that modifier then. i think capslock
 135                           is weird in xkb. */
 136     mask &= ~obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_NUMLOCK);
 137     mask &= ~obt_keyboard_modkey_to_modmask(OBT_KEYBOARD_MODKEY_SCROLLLOCK);
 138     return mask;
 139 }
 140
 141 guint obt_keyboard_modkey_to_modmask(ObtModkeysKey key)
 142 {
 143     return modkeys_keys[key];
 144 }
 145
 146 static void set_modkey_mask(guchar mask, KeySym sym)
 147 {
 148     /* find what key this is, and bind it to the mask */
 149
 150     if (sym == XK_Num_Lock)
 151         modkeys_keys[OBT_KEYBOARD_MODKEY_NUMLOCK] |= mask;
 152     else if (sym == XK_Scroll_Lock)
 153         modkeys_keys[OBT_KEYBOARD_MODKEY_SCROLLLOCK] |= mask;
 154
 155     else if (sym == XK_Super_L && super_l)
 156         modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] |= mask;
 157     else if (sym == XK_Super_L && !super_l)
 158         /* left takes precident over right, so erase any masks the right
 159            key may have set */
 160         modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] = mask, super_l = TRUE;
 161     else if (sym == XK_Super_R && !super_l)
 162         modkeys_keys[OBT_KEYBOARD_MODKEY_SUPER] |= mask;
 163
 164     else if (sym == XK_Hyper_L && hyper_l)
 165         modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] |= mask;
 166     else if (sym == XK_Hyper_L && !hyper_l)
 167         modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] = mask, hyper_l = TRUE;
 168     else if (sym == XK_Hyper_R && !hyper_l)
 169         modkeys_keys[OBT_KEYBOARD_MODKEY_HYPER] |= mask;
 170
 171     else if (sym == XK_Alt_L && alt_l)
 172         modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] |= mask;
 173     else if (sym == XK_Alt_L && !alt_l)
 174         modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] = mask, alt_l = TRUE;
 175     else if (sym == XK_Alt_R && !alt_l)
 176         modkeys_keys[OBT_KEYBOARD_MODKEY_ALT] |= mask;
 177
 178     else if (sym == XK_Meta_L && meta_l)
 179         modkeys_keys[OBT_KEYBOARD_MODKEY_META] |= mask;
 180     else if (sym == XK_Meta_L && !meta_l)
 181         modkeys_keys[OBT_KEYBOARD_MODKEY_META] = mask, meta_l = TRUE;
 182     else if (sym == XK_Meta_R && !meta_l)
 183         modkeys_keys[OBT_KEYBOARD_MODKEY_META] |= mask;
 184
 185     /* CapsLock, Shift, and Control are special and hard-coded */
 186 }
 187
 188 KeyCode* obt_keyboard_keysym_to_keycode(KeySym sym)
 189 {
 190     KeyCode *ret;
 191     gint i, j, n;
 192
 193     ret = g_new(KeyCode, 1);
 194     n = 0;
 195     ret[n] = 0;
 196
 197     /* go through each keycode and look for the keysym */
 198     for (i = min_keycode; i <= max_keycode; ++i)
 199         for (j = 0; j < keysyms_per_keycode; ++j)
 200             if (sym == keymap[(i-min_keycode) * keysyms_per_keycode + j]) {
 201                 ret = g_renew(KeyCode, ret, ++n);
 202                 ret[n-1] = i;
 203                 ret[n] = 0;
 204             }
 205     return ret;
 206 }
 207
 208 gchar *obt_keyboard_keycode_to_string(guint keycode)
 209 {
 210     KeySym sym;
 211
 212     if ((sym = XKeycodeToKeysym(obt_display, keycode, 0)) != NoSymbol)
 213         return g_locale_to_utf8(XKeysymToString(sym), -1, NULL, NULL, NULL);
 214     return NULL;
 215 }
 216
 217 gunichar obt_keyboard_keycode_to_unichar(guint keycode)
 218 {
 219     gunichar unikey = 0;
 220     char *key;
 221
 222     if ((key = obt_keyboard_keycode_to_string(keycode)) != NULL &&
 223         /* don't accept keys that aren't a single letter, like "space" */
 224         key[1] == '\0')
 225     {
 226         unikey = g_utf8_get_char_validated(key, -1);
 227         if (unikey == (gunichar)-1 || unikey == (gunichar)-2 || unikey == 0)
 228             unikey = 0;
 229     }
 230     g_free(key);
 231     return unikey;
 232 }