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 /* This is a bitmask of the different masks for each modifier key */
  40 static guchar modkeys_keys[OB_MODKEY_NUM_KEYS];
  41
  42 void modkeys_startup(gboolean reconfigure)
  43 {
  44     KeySym *keymap;
  45     gint i, j, k;
  46     gint min_keycode, max_keycode, keysyms_per_keycode;
  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             /* go through each keysym bound to the given keycode */
  68             for (k = 0; k < keysyms_per_keycode; ++k) {
  69                 sym = keymap[(keycode-min_keycode) * keysyms_per_keycode + k];
  70                 if (sym != NoSymbol) {
  71                     /* bind the key to the mask (e.g. Alt_L => Mod1Mask) */
  72                     set_modkey_mask(nth_mask(i), sym);
  73                 }
  74             }
  75         }
  76     }
  77     XFree(keymap);
  78 }
  79
  80 void modkeys_shutdown(gboolean reconfigure)
  81 {
  82     XFreeModifiermap(modmap);
  83 }
  84
  85 guint modkeys_keycode_to_mask(guint keycode)
  86 {
  87     gint i, j;
  88     guint mask = 0;
  89
  90     if (keycode == NoSymbol) return 0;
  91
  92     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
  93     for (i = 0; i < NUM_MASKS; ++i) {
  94         /* go through each keycode that is bound to the mask */
  95         for (j = 0; j < modmap->max_keypermod; ++j) {
  96             /* compare with a keycode that is bound to the mask (i) */
  97             if (modmap->modifiermap[i*modmap->max_keypermod + j] == keycode)
  98                 mask |= nth_mask(i);
  99         }
 100     }
 101     return mask;
 102 }
 103
 104 guint modkeys_only_modifier_masks(guint mask)
 105 {
 106     mask &= ALL_MASKS;
 107     /* strip off these lock keys. they shouldn't affect key bindings */
 108     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_CAPSLOCK);
 109     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_NUMLOCK);
 110     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_SCROLLLOCK);
 111     return mask;
 112 }
 113
 114 guint modkeys_key_to_mask(ObModkeysKey key)
 115 {
 116     return modkeys_keys[key];
 117 }
 118
 119 static void set_modkey_mask(guchar mask, KeySym sym)
 120 {
 121     /* find what key this is, and bind it to the mask */
 122
 123     if (sym == XK_Num_Lock)
 124         modkeys_keys[OB_MODKEY_KEY_NUMLOCK] |= mask;
 125     else if (sym == XK_Scroll_Lock)
 126         modkeys_keys[OB_MODKEY_KEY_SCROLLLOCK] |= mask;
 127     else if (sym == XK_Caps_Lock)
 128         modkeys_keys[OB_MODKEY_KEY_CAPSLOCK] |= mask;
 129     else if (sym == XK_Shift_L || sym == XK_Shift_R)
 130         modkeys_keys[OB_MODKEY_KEY_SHIFT] |= mask;
 131     else if (sym == XK_Control_L || sym == XK_Control_R)
 132         modkeys_keys[OB_MODKEY_KEY_CONTROL] |= mask;
 133     else if (sym == XK_Super_L || sym == XK_Super_R)
 134         modkeys_keys[OB_MODKEY_KEY_SUPER] |= mask;
 135     else if (sym == XK_Hyper_L || sym == XK_Hyper_R)
 136         modkeys_keys[OB_MODKEY_KEY_HYPER] |= mask;
 137     else if (sym == XK_Alt_L || sym == XK_Alt_R)
 138         modkeys_keys[OB_MODKEY_KEY_ALT] |= mask;
 139     else if (sym == XK_Meta_L || sym == XK_Meta_R)
 140         modkeys_keys[OB_MODKEY_KEY_META] |= mask;
 141 }