libs/Grab.c

   1 /* -*-c-*- */
   2 /* This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  15  */
  16
  17 /*
  18 ** MyXGrabServer & MyXUngrabServer - to handle nested grab server calls
  19 */
  20
  21 #include "config.h"
  22
  23 #include "Grab.h"
  24
  25 /* Made into global for module interface.  See module.c. */
  26 int myxgrabcount = 0;
  27 static unsigned int keyboard_grab_count = 0;
  28 static unsigned int key_grab_count = 0;
  29
  30 void MyXGrabServer(Display *disp)
  31 {
  32         if (myxgrabcount == 0)
  33         {
  34                 XSync(disp, 0);
  35                 XGrabServer(disp);
  36         }
  37         XSync(disp, 0);
  38         ++myxgrabcount;
  39 }
  40
  41 void MyXUngrabServer(Display *disp)
  42 {
  43         if (--myxgrabcount < 0) /* should never happen */
  44         {
  45                 myxgrabcount = 0;
  46         }
  47         if (myxgrabcount == 0)
  48         {
  49                 XUngrabServer(disp);
  50         }
  51         XSync(disp, 0);
  52 }
  53
  54 void MyXGrabKeyboard(Display *dpy)
  55 {
  56         keyboard_grab_count++;
  57         XGrabKeyboard(
  58                 dpy, RootWindow(dpy, DefaultScreen(dpy)), False, GrabModeAsync,
  59                 GrabModeAsync, CurrentTime);
  60
  61         return;
  62 }
  63
  64 void MyXUngrabKeyboard(Display *dpy)
  65 {
  66         if (keyboard_grab_count > 0)
  67         {
  68                 keyboard_grab_count--;
  69         }
  70         if (keyboard_grab_count == 0 && key_grab_count == 0)
  71         {
  72                 XUngrabKeyboard(dpy, CurrentTime);
  73         }
  74
  75         return;
  76 }
  77
  78 void MyXGrabKey(Display *disp)
  79 {
  80         key_grab_count++;
  81
  82         return;
  83 }
  84
  85 void MyXUngrabKey(Display *disp)
  86 {
  87         if (key_grab_count > 0)
  88         {
  89                 key_grab_count--;
  90                 keyboard_grab_count++;
  91                 MyXUngrabKeyboard(disp);
  92         }
  93
  94         return;
  95 }