Dogcows Code - chaz/openbox/blob - openbox/modkeys.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    modkeys.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 "modkeys.h"
  20 #include "openbox.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
  38 static XModifierKeymap *modmap;
  39 static KeySym *keymap;
  40 static gint min_keycode, max_keycode, keysyms_per_keycode;
  41 /* This is a bitmask of the different masks for each modifier key */
  42 static guchar modkeys_keys[OB_MODKEY_NUM_KEYS];
  43
  44 void modkeys_startup(gboolean reconfigure)
  45 {
  46     gint i, j, k;
  47
  48     /* reset the keys to not be bound to any masks */
  49     for (i = 0; i < OB_MODKEY_NUM_KEYS; ++i)
  50         modkeys_keys[i] = 0;
  51
  52     modmap = XGetModifierMapping(ob_display);
  53     g_assert(modmap->max_keypermod > 0);
  54
  55     XDisplayKeycodes(ob_display, &min_keycode, &max_keycode);
  56     keymap = XGetKeyboardMapping(ob_display, min_keycode,
  57                                  max_keycode - min_keycode + 1,
  58                                  &keysyms_per_keycode);
  59
  60     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
  61     for (i = 0; i < NUM_MASKS; ++i) {
  62         /* go through each keycode that is bound to the mask */
  63         for (j = 0; j < modmap->max_keypermod; ++j) {
  64             KeySym sym;
  65             /* get a keycode that is bound to the mask (i) */
  66             KeyCode keycode = modmap->modifiermap[i*modmap->max_keypermod + j];
  67             if (keycode) {
  68                 /* go through each keysym bound to the given keycode */
  69                 for (k = 0; k < keysyms_per_keycode; ++k) {
  70                     sym = keymap[(keycode-min_keycode) * keysyms_per_keycode +
  71                                  k];
  72                     if (sym != NoSymbol) {
  73                         /* bind the key to the mask (e.g. Alt_L => Mod1Mask) */
  74                         set_modkey_mask(nth_mask(i), sym);
  75                     }
  76                 }
  77             }
  78         }
  79     }
  80
  81     /* CapsLock, Shift, and Control are special and hard-coded */
  82     modkeys_keys[OB_MODKEY_KEY_CAPSLOCK] = LockMask;
  83     modkeys_keys[OB_MODKEY_KEY_SHIFT] = ShiftMask;
  84     modkeys_keys[OB_MODKEY_KEY_CONTROL] = ControlMask;
  85 }
  86
  87 void modkeys_shutdown(gboolean reconfigure)
  88 {
  89     XFreeModifiermap(modmap);
  90     XFree(keymap);
  91 }
  92
  93 guint modkeys_keycode_to_mask(guint keycode)
  94 {
  95     gint i, j;
  96     guint mask = 0;
  97
  98     if (keycode == NoSymbol) return 0;
  99
 100     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
 101     for (i = 0; i < NUM_MASKS; ++i) {
 102         /* go through each keycode that is bound to the mask */
 103         for (j = 0; j < modmap->max_keypermod; ++j) {
 104             /* compare with a keycode that is bound to the mask (i) */
 105             if (modmap->modifiermap[i*modmap->max_keypermod + j] == keycode)
 106                 mask |= nth_mask(i);
 107         }
 108     }
 109     return mask;
 110 }
 111
 112 guint modkeys_only_modifier_masks(guint mask)
 113 {
 114     mask &= ALL_MASKS;
 115     /* strip off these lock keys. they shouldn't affect key bindings */
 116     mask &= ~LockMask; /* use the LockMask, not what capslock is bound to,
 117                           because you could bind it to something else and it
 118                           should work as that modifier then. i think capslock
 119                           is weird in xkb. */
 120     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_NUMLOCK);
 121     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_SCROLLLOCK);
 122     return mask;
 123 }
 124
 125 guint modkeys_key_to_mask(ObModkeysKey key)
 126 {
 127     return modkeys_keys[key];
 128 }
 129
 130 static void set_modkey_mask(guchar mask, KeySym sym)
 131 {
 132     /* find what key this is, and bind it to the mask */
 133
 134     if (sym == XK_Num_Lock)
 135         modkeys_keys[OB_MODKEY_KEY_NUMLOCK] |= mask;
 136     else if (sym == XK_Scroll_Lock)
 137         modkeys_keys[OB_MODKEY_KEY_SCROLLLOCK] |= mask;
 138     else if (sym == XK_Super_L || sym == XK_Super_R)
 139         modkeys_keys[OB_MODKEY_KEY_SUPER] |= mask;
 140     else if (sym == XK_Hyper_L || sym == XK_Hyper_R)
 141         modkeys_keys[OB_MODKEY_KEY_HYPER] |= mask;
 142     else if (sym == XK_Alt_L || sym == XK_Alt_R)
 143         modkeys_keys[OB_MODKEY_KEY_ALT] |= mask;
 144     else if (sym == XK_Meta_L || sym == XK_Meta_R)
 145         modkeys_keys[OB_MODKEY_KEY_META] |= mask;
 146     /* CapsLock, Shift, and Control are special and hard-coded */
 147 }
 148
 149 KeyCode modkeys_sym_to_code(KeySym sym)
 150 {
 151     gint i, j;
 152
 153     /* go through each keycode and look for the keysym */
 154     for (i = min_keycode; i <= max_keycode; ++i)
 155         for (j = 0; j < keysyms_per_keycode; ++j)
 156             if (sym == keymap[(i-min_keycode) * keysyms_per_keycode + j])
 157                 return i;
 158     return 0;
 159 }
 160