common/xutil.c

   1 /*
   2  * common/xutil.c - X-related useful functions
   3  *
   4  * Copyright © 2007-2008 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 #include <X11/Xutil.h>
  23 #include <X11/Xatom.h>
  24
  25 #include "common/util.h"
  26 #include "common/xutil.h"
  27
  28 Bool
  29 xgettextprop(Display *disp, Window w, Atom atom, char *text, ssize_t textlen)
  30 {
  31     char **list = NULL;
  32     int n;
  33     XTextProperty name;
  34
  35     if(!text || !textlen)
  36         return False;
  37
  38     text[0] = '\0';
  39     XGetTextProperty(disp, w, &name, atom);
  40
  41     if(!name.nitems)
  42         return False;
  43
  44     if(name.encoding == XA_STRING)
  45         a_strncpy(text, textlen, (char *) name.value, textlen - 1);
  46
  47     else if(XmbTextPropertyToTextList(disp, &name, &list, &n) >= Success && n > 0 && *list)
  48     {
  49         a_strncpy(text, textlen, *list, textlen - 1);
  50         XFreeStringList(list);
  51     }
  52
  53     text[textlen - 1] = '\0';
  54     XFree(name.value);
  55
  56     return True;
  57 }
  58
  59 unsigned int
  60 get_numlockmask(Display *disp)
  61 {
  62     XModifierKeymap *modmap;
  63     unsigned int mask = 0;
  64     int i, j;
  65
  66     modmap = XGetModifierMapping(disp);
  67     for(i = 0; i < 8; i++)
  68         for(j = 0; j < modmap->max_keypermod; j++)
  69             if(modmap->modifiermap[i * modmap->max_keypermod + j]
  70                == XKeysymToKeycode(disp, XK_Num_Lock))
  71                 mask = (1 << i);
  72
  73     XFreeModifiermap(modmap);
  74
  75     return mask;
  76 }
  77
  78 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80