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 /* This is 8 lists of keycodes that are bound to the given mod mask.
  39    If contains more than the one given to us by X cuz XKB is weird apparently.
  40    We will look up all keycodes for a given keysym that is bound to the mask,
  41    and add them all here.
  42
  43    With XKB, you can have a keycode bound to a modifier that isn't in the
  44    modifier map somehow.  So this means that when we try translate from the
  45    KeyRelease to a mod mask, we are unable to.  So this array stores *all*
  46    the KeyCodes for each KeySym for each KeyCode bound to a mod mask.
  47    Confused? Haha...
  48
  49    ModMask -> n KeyCodes -> n*m KeySyms (up to m for each KeyCode) ->
  50      n*m*p KeyCodes (up to p for each KeySym)
  51 */
  52 static GArray *modmap[NUM_MASKS];
  53 static KeySym *keymap;
  54 static gint min_keycode, max_keycode, keysyms_per_keycode;
  55 /* This is a bitmask of the different masks for each modifier key */
  56 static guchar modkeys_keys[OB_MODKEY_NUM_KEYS];
  57
  58 static gboolean alt_l = FALSE;
  59 static gboolean meta_l = FALSE;
  60 static gboolean super_l = FALSE;
  61 static gboolean hyper_l = FALSE;
  62
  63 void modkeys_startup(gboolean reconfigure)
  64 {
  65     static XModifierKeymap *xmodmap;
  66     gint i, j, k, l, m;
  67
  68     /* reset the keys to not be bound to any masks */
  69     for (i = 0; i < OB_MODKEY_NUM_KEYS; ++i)
  70         modkeys_keys[i] = 0;
  71
  72     xmodmap = XGetModifierMapping(ob_display);
  73     g_assert(xmodmap->max_keypermod > 0);
  74
  75     XDisplayKeycodes(ob_display, &min_keycode, &max_keycode);
  76     keymap = XGetKeyboardMapping(ob_display, min_keycode,
  77                                  max_keycode - min_keycode + 1,
  78                                  &keysyms_per_keycode);
  79
  80     alt_l = meta_l = super_l = hyper_l = FALSE;
  81
  82     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
  83     for (i = 0; i < NUM_MASKS; ++i) {
  84         /* reset the modmap list */
  85         modmap[i] = g_array_new(FALSE, FALSE, sizeof(KeyCode));
  86
  87         /* go through each keycode that is bound to the mask */
  88         for (j = 0; j < xmodmap->max_keypermod; ++j) {
  89             KeySym sym;
  90             /* get a keycode that is bound to the mask (i) */
  91             KeyCode keycode = xmodmap->modifiermap[i*xmodmap->max_keypermod+j];
  92             if (keycode) {
  93                 /* go through each keysym bound to the given keycode */
  94                 for (k = 0; k < keysyms_per_keycode; ++k) {
  95                     sym = keymap[(keycode-min_keycode) * keysyms_per_keycode +
  96                                  k];
  97                     if (sym != NoSymbol) {
  98                         /* find all keycodes for the given keysym */
  99                         for (l = min_keycode; l <= max_keycode; ++l)
 100                             for (m = 0; m < keysyms_per_keycode; ++m)
 101                                 if (keymap[(l-min_keycode) *
 102                                            keysyms_per_keycode + m] == sym)
 103                                 {
 104                                     /* add all keycodes for the keysym to our
 105                                        modmap */
 106                                     g_array_append_val(modmap[i], l);
 107                                 }
 108
 109                         /* bind the key to the mask (e.g. Alt_L => Mod1Mask) */
 110                         set_modkey_mask(nth_mask(i), sym);
 111                     }
 112                 }
 113             }
 114         }
 115     }
 116
 117     /* CapsLock, Shift, and Control are special and hard-coded */
 118     modkeys_keys[OB_MODKEY_KEY_CAPSLOCK] = LockMask;
 119     modkeys_keys[OB_MODKEY_KEY_SHIFT] = ShiftMask;
 120     modkeys_keys[OB_MODKEY_KEY_CONTROL] = ControlMask;
 121
 122     XFreeModifiermap(xmodmap);
 123 }
 124
 125 void modkeys_shutdown(gboolean reconfigure)
 126 {
 127     guint i;
 128
 129     for (i = 0; i < NUM_MASKS; ++i)
 130         g_array_free(modmap[i], TRUE);
 131     XFree(keymap);
 132 }
 133
 134 guint modkeys_keycode_to_mask(guint keycode)
 135 {
 136     guint i, j;
 137     guint mask = 0;
 138
 139     if (keycode == NoSymbol) return 0;
 140
 141     /* go through each of the modifier masks (eg ShiftMask, CapsMask...) */
 142     for (i = 0; i < NUM_MASKS; ++i) {
 143         /* go through each keycode that is bound to the mask */
 144         for (j = 0; j < modmap[i]->len; ++j) {
 145             /* compare with a keycode that is bound to the mask (i) */
 146             if (g_array_index(modmap[i], KeyCode, j) == keycode)
 147                 mask |= nth_mask(i);
 148         }
 149     }
 150     return mask;
 151 }
 152
 153 guint modkeys_only_modifier_masks(guint mask)
 154 {
 155     mask &= ALL_MASKS;
 156     /* strip off these lock keys. they shouldn't affect key bindings */
 157     mask &= ~LockMask; /* use the LockMask, not what capslock is bound to,
 158                           because you could bind it to something else and it
 159                           should work as that modifier then. i think capslock
 160                           is weird in xkb. */
 161     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_NUMLOCK);
 162     mask &= ~modkeys_key_to_mask(OB_MODKEY_KEY_SCROLLLOCK);
 163     return mask;
 164 }
 165
 166 guint modkeys_key_to_mask(ObModkeysKey key)
 167 {
 168     return modkeys_keys[key];
 169 }
 170
 171 static void set_modkey_mask(guchar mask, KeySym sym)
 172 {
 173     /* find what key this is, and bind it to the mask */
 174
 175     if (sym == XK_Num_Lock)
 176         modkeys_keys[OB_MODKEY_KEY_NUMLOCK] |= mask;
 177     else if (sym == XK_Scroll_Lock)
 178         modkeys_keys[OB_MODKEY_KEY_SCROLLLOCK] |= mask;
 179
 180     else if (sym == XK_Super_L && super_l)
 181         modkeys_keys[OB_MODKEY_KEY_SUPER] |= mask;
 182     else if (sym == XK_Super_L && !super_l)
 183         /* left takes precident over right, so erase any masks the right
 184            key may have set */
 185         modkeys_keys[OB_MODKEY_KEY_SUPER] = mask, super_l = TRUE;
 186     else if (sym == XK_Super_R && !super_l)
 187         modkeys_keys[OB_MODKEY_KEY_SUPER] |= mask;
 188
 189     else if (sym == XK_Hyper_L && hyper_l)
 190         modkeys_keys[OB_MODKEY_KEY_HYPER] |= mask;
 191     else if (sym == XK_Hyper_L && !hyper_l)
 192         modkeys_keys[OB_MODKEY_KEY_HYPER] = mask, hyper_l = TRUE;
 193     else if (sym == XK_Hyper_R && !hyper_l)
 194         modkeys_keys[OB_MODKEY_KEY_HYPER] |= mask;
 195
 196     else if (sym == XK_Alt_L && alt_l)
 197         modkeys_keys[OB_MODKEY_KEY_ALT] |= mask;
 198     else if (sym == XK_Alt_L && !alt_l)
 199         modkeys_keys[OB_MODKEY_KEY_ALT] = mask, alt_l = TRUE;
 200     else if (sym == XK_Alt_R && !alt_l)
 201         modkeys_keys[OB_MODKEY_KEY_ALT] |= mask;
 202
 203     else if (sym == XK_Meta_L && meta_l)
 204         modkeys_keys[OB_MODKEY_KEY_META] |= mask;
 205     else if (sym == XK_Meta_L && !meta_l)
 206         modkeys_keys[OB_MODKEY_KEY_META] = mask, meta_l = TRUE;
 207     else if (sym == XK_Meta_R && !meta_l)
 208         modkeys_keys[OB_MODKEY_KEY_META] |= mask;
 209
 210     /* CapsLock, Shift, and Control are special and hard-coded */
 211 }
 212
 213 KeyCode modkeys_sym_to_code(KeySym sym)
 214 {
 215     gint i, j;
 216
 217     /* go through each keycode and look for the keysym */
 218     for (i = min_keycode; i <= max_keycode; ++i)
 219         for (j = 0; j < keysyms_per_keycode; ++j)
 220             if (sym == keymap[(i-min_keycode) * keysyms_per_keycode + j])
 221                 return i;
 222     return 0;
 223 }
 224