common/xutil.c

   1 /*
   2  * common/xutil.c - X-related useful functions
   3  *
   4  * Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
   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  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 /* XCB doesn't provide keysyms definition */
  23 #include <X11/keysym.h>
  24
  25 #include "common/util.h"
  26
  27 #include <xcb/xcb.h>
  28 #include <xcb/xcb_atom.h>
  29 #include <xcb/xcb_icccm.h>
  30
  31 #include "common/xutil.h"
  32 #include "common/tokenize.h"
  33
  34 /** Get the lock masks (shiftlock, numlock, capslock, modeswitch).
  35  * \param connection The X connection.
  36  * \param cookie The cookie of the request.
  37  * \param keysyms Key symbols.
  38  * \param numlockmask Numlock mask.
  39  * \param shiftlockmask Shiftlock mask.
  40  * \param capslockmask Capslock mask.
  41  * \todo Split this.
  42  */
  43 void
  44 xutil_lock_mask_get(xcb_connection_t *connection,
  45                     xcb_get_modifier_mapping_cookie_t cookie,
  46                     xcb_key_symbols_t *keysyms,
  47                     uint16_t *numlockmask,
  48                     uint16_t *shiftlockmask,
  49                     uint16_t *capslockmask,
  50                     uint16_t *modeswitchmask)
  51 {
  52     xcb_get_modifier_mapping_reply_t *modmap_r;
  53     xcb_keycode_t *modmap, kc;
  54     xcb_keycode_t *numlockcodes = xcb_key_symbols_get_keycode(keysyms, XK_Num_Lock);
  55     xcb_keycode_t *shiftlockcodes = xcb_key_symbols_get_keycode(keysyms, XK_Shift_Lock);
  56     xcb_keycode_t *capslockcodes = xcb_key_symbols_get_keycode(keysyms, XK_Caps_Lock);
  57     xcb_keycode_t *modeswitchcodes = xcb_key_symbols_get_keycode(keysyms, XK_Mode_switch);
  58
  59     modmap_r = xcb_get_modifier_mapping_reply(connection, cookie, NULL);
  60     modmap = xcb_get_modifier_mapping_keycodes(modmap_r);
  61
  62     /* reset */
  63     *numlockmask = *shiftlockmask = *capslockmask = *modeswitchmask = 0;
  64
  65     int i;
  66     for(i = 0; i < 8; i++)
  67         for(int j = 0; j < modmap_r->keycodes_per_modifier; j++)
  68         {
  69             kc = modmap[i * modmap_r->keycodes_per_modifier + j];
  70
  71 #define LOOK_FOR(mask, codes) \
  72             if(*mask == 0 && codes) \
  73                 for(xcb_keycode_t *ktest = codes; *ktest; ktest++) \
  74                     if(*ktest == kc) \
  75                     { \
  76                         *mask = (1 << i); \
  77                         break; \
  78                     }
  79
  80             LOOK_FOR(numlockmask, numlockcodes)
  81             LOOK_FOR(shiftlockmask, shiftlockcodes)
  82             LOOK_FOR(capslockmask, capslockcodes)
  83             LOOK_FOR(modeswitchmask, modeswitchcodes)
  84 #undef LOOK_FOR
  85         }
  86     p_delete(&numlockcodes);
  87     p_delete(&shiftlockcodes);
  88     p_delete(&capslockcodes);
  89     p_delete(&modeswitchcodes);
  90     p_delete(&modmap_r);
  91 }
  92
  93 /* Number of different errors */
  94 #define ERRORS_NBR 256
  95
  96 void
  97 xutil_error_handler_catch_all_set(xcb_event_handlers_t *evenths,
  98                                   xcb_generic_error_handler_t handler,
  99                                   void *data)
 100 {
 101     int err_num;
 102     for(err_num = 0; err_num < ERRORS_NBR; err_num++)
 103         xcb_event_set_error_handler(evenths, err_num, handler, data);
 104 }
 105
 106 uint16_t
 107 xutil_key_mask_fromstr(const char *keyname, size_t len)
 108 {
 109     switch(a_tokenize(keyname, len))
 110     {
 111       case A_TK_SHIFT:   return XCB_MOD_MASK_SHIFT;
 112       case A_TK_LOCK:    return XCB_MOD_MASK_LOCK;
 113       case A_TK_CTRL:
 114       case A_TK_CONTROL: return XCB_MOD_MASK_CONTROL;
 115       case A_TK_MOD1:    return XCB_MOD_MASK_1;
 116       case A_TK_MOD2:    return XCB_MOD_MASK_2;
 117       case A_TK_MOD3:    return XCB_MOD_MASK_3;
 118       case A_TK_MOD4:    return XCB_MOD_MASK_4;
 119       case A_TK_MOD5:    return XCB_MOD_MASK_5;
 120       /* this is misnamed but correct */
 121       case A_TK_ANY:     return XCB_BUTTON_MASK_ANY;
 122       default:           return XCB_NO_SYMBOL;
 123     }
 124 }
 125
 126 void
 127 xutil_key_mask_tostr(uint16_t mask, const char **name, size_t *len)
 128 {
 129     switch(mask)
 130     {
 131 #define SET_RESULT(res) \
 132         *name = #res; \
 133         *len = sizeof(#res) - 1; \
 134         return;
 135       case XCB_MOD_MASK_SHIFT:   SET_RESULT(Shift)
 136       case XCB_MOD_MASK_LOCK:    SET_RESULT(Lock)
 137       case XCB_MOD_MASK_CONTROL: SET_RESULT(Control)
 138       case XCB_MOD_MASK_1:       SET_RESULT(Mod1)
 139       case XCB_MOD_MASK_2:       SET_RESULT(Mod2)
 140       case XCB_MOD_MASK_3:       SET_RESULT(Mod3)
 141       case XCB_MOD_MASK_4:       SET_RESULT(Mod4)
 142       case XCB_MOD_MASK_5:       SET_RESULT(Mod5)
 143       case XCB_BUTTON_MASK_ANY:  SET_RESULT(Any)
 144       default:                   SET_RESULT(Unknown)
 145 #undef SET_RESULT
 146     }
 147 }
 148
 149 /** Convert a root window a physical screen ID.
 150  * \param connection The connection to the X server.
 151  * \param root Root window.
 152  * \return A physical screen number.
 153  */
 154 int
 155 xutil_root2screen(xcb_connection_t *connection, xcb_window_t root)
 156 {
 157     xcb_screen_iterator_t iter;
 158     int phys_screen = 0;
 159
 160     for(iter = xcb_setup_roots_iterator(xcb_get_setup(connection));
 161         iter.rem && iter.data->root != root; xcb_screen_next(&iter), ++phys_screen);
 162
 163     return phys_screen;
 164 }
 165
 166 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80