Dogcows Code - chaz/openbox/blob - openbox/grab.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    grab.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003        Ben Jansens
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include "grab.h"
  21 #include "openbox.h"
  22 #include "event.h"
  23 #include "xerror.h"
  24 #include "screen.h"
  25
  26 #include <glib.h>
  27 #include <X11/Xlib.h>
  28
  29 #define GRAB_PTR_MASK (ButtonPressMask | ButtonReleaseMask | PointerMotionMask)
  30 #define GRAB_KEY_MASK (KeyPressMask | KeyReleaseMask)
  31
  32 #define MASK_LIST_SIZE 8
  33
  34 /*! A list of all possible combinations of keyboard lock masks */
  35 static guint mask_list[MASK_LIST_SIZE];
  36 static guint kgrabs = 0;
  37 static guint pgrabs = 0;
  38 /*! The time at which the last grab was made */
  39 static Time  grab_time = CurrentTime;
  40
  41 static Time ungrab_time()
  42 {
  43     Time t = event_curtime;
  44     if (!(t == 0 || event_time_after(t, grab_time)))
  45         t = grab_time;
  46     return t;
  47 }
  48
  49 gboolean grab_on_keyboard()
  50 {
  51     return kgrabs > 0;
  52 }
  53
  54 gboolean grab_on_pointer()
  55 {
  56     return pgrabs > 0;
  57 }
  58
  59 gboolean grab_keyboard(gboolean grab)
  60 {
  61     gboolean ret = FALSE;
  62
  63     if (grab) {
  64         if (kgrabs++ == 0) {
  65             ret = XGrabKeyboard(ob_display, RootWindow(ob_display, ob_screen),
  66                                 FALSE, GrabModeAsync, GrabModeAsync,
  67                                 event_curtime) == Success;
  68             if (!ret)
  69                 --kgrabs;
  70             else
  71                 grab_time = event_curtime;
  72         } else
  73             ret = TRUE;
  74     } else if (kgrabs > 0) {
  75         if (--kgrabs == 0) {
  76             XUngrabKeyboard(ob_display, ungrab_time());
  77         }
  78         ret = TRUE;
  79     }
  80
  81     return ret;
  82 }
  83
  84 gboolean grab_pointer(gboolean grab, ObCursor cur)
  85 {
  86     gboolean ret = FALSE;
  87
  88     if (grab) {
  89         if (pgrabs++ == 0) {
  90             ret = XGrabPointer(ob_display, screen_support_win,
  91                                False, GRAB_PTR_MASK, GrabModeAsync,
  92                                GrabModeAsync, None,
  93                                ob_cursor(cur), event_curtime) == Success;
  94             if (!ret)
  95                 --pgrabs;
  96             else
  97                 grab_time = event_curtime;
  98         } else
  99             ret = TRUE;
 100     } else if (pgrabs > 0) {
 101         if (--pgrabs == 0) {
 102             XUngrabPointer(ob_display, ungrab_time());
 103         }
 104         ret = TRUE;
 105     }
 106     return ret;
 107 }
 108
 109 gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win)
 110 {
 111     gboolean ret = FALSE;
 112
 113     if (grab) {
 114         if (pgrabs++ == 0) {
 115             ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK,
 116                                GrabModeAsync, GrabModeAsync, None,
 117                                ob_cursor(cur),
 118                                event_curtime) == Success;
 119             if (!ret)
 120                 --pgrabs;
 121             else
 122                 grab_time = event_curtime;
 123         } else
 124             ret = TRUE;
 125     } else if (pgrabs > 0) {
 126         if (--pgrabs == 0) {
 127             XUngrabPointer(ob_display, ungrab_time());
 128         }
 129         ret = TRUE;
 130     }
 131     return ret;
 132 }
 133
 134 gint grab_server(gboolean grab)
 135 {
 136     static guint sgrabs = 0;
 137     if (grab) {
 138         if (sgrabs++ == 0) {
 139             XGrabServer(ob_display);
 140             XSync(ob_display, FALSE);
 141         }
 142     } else if (sgrabs > 0) {
 143         if (--sgrabs == 0) {
 144             XUngrabServer(ob_display);
 145             XFlush(ob_display);
 146         }
 147     }
 148     return sgrabs;
 149 }
 150
 151 void grab_startup(gboolean reconfig)
 152 {
 153     guint i = 0;
 154
 155     if (reconfig) return;
 156
 157     mask_list[i++] = 0;
 158     mask_list[i++] = LockMask;
 159     mask_list[i++] = NumLockMask;
 160     mask_list[i++] = LockMask | NumLockMask;
 161     mask_list[i++] = ScrollLockMask;
 162     mask_list[i++] = ScrollLockMask | LockMask;
 163     mask_list[i++] = ScrollLockMask | NumLockMask;
 164     mask_list[i++] = ScrollLockMask | LockMask | NumLockMask;
 165     g_assert(i == MASK_LIST_SIZE);
 166 }
 167
 168 void grab_shutdown(gboolean reconfig)
 169 {
 170     if (reconfig) return;
 171
 172     while (grab_keyboard(FALSE));
 173     while (grab_pointer(FALSE, OB_CURSOR_NONE));
 174     while (grab_pointer_window(FALSE, OB_CURSOR_NONE, None));
 175     while (grab_server(FALSE));
 176 }
 177
 178 void grab_button_full(guint button, guint state, Window win, guint mask,
 179                       gint pointer_mode, ObCursor cur)
 180 {
 181     guint i;
 182
 183     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 184     xerror_occured = FALSE;
 185     for (i = 0; i < MASK_LIST_SIZE; ++i)
 186         XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
 187                     pointer_mode, GrabModeSync, None, ob_cursor(cur));
 188     xerror_set_ignore(FALSE);
 189     if (xerror_occured)
 190         g_warning("failed to grab button %d modifiers %d", button, state);
 191 }
 192
 193 void grab_button(guint button, guint state, Window win, guint mask)
 194 {
 195     grab_button_full(button, state, win, mask, GrabModeAsync, OB_CURSOR_NONE);
 196 }
 197
 198 void ungrab_button(guint button, guint state, Window win)
 199 {
 200     guint i;
 201
 202     for (i = 0; i < MASK_LIST_SIZE; ++i)
 203         XUngrabButton(ob_display, button, state | mask_list[i], win);
 204 }
 205
 206 void grab_key(guint keycode, guint state, Window win, gint keyboard_mode)
 207 {
 208     guint i;
 209
 210     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 211     xerror_occured = FALSE;
 212     for (i = 0; i < MASK_LIST_SIZE; ++i)
 213         XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE,
 214                  GrabModeAsync, keyboard_mode);
 215     xerror_set_ignore(FALSE);
 216     if (xerror_occured)
 217         g_warning("failed to grab keycode %d modifiers %d", keycode, state);
 218 }
 219
 220 void ungrab_all_keys(Window win)
 221 {
 222     XUngrabKey(ob_display, AnyKey, AnyModifier, win);
 223 }