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

   1 /* -*- indent-tabs-mode: t; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    grab.c for the Openbox window manager
   4    Copyright (c) 2003        Ben 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 "grab.h"
  20 #include "openbox.h"
  21 #include "event.h"
  22 #include "xerror.h"
  23 #include "screen.h"
  24
  25 #include <glib.h>
  26 #include <X11/Xlib.h>
  27
  28 #define GRAB_PTR_MASK (ButtonPressMask | ButtonReleaseMask | PointerMotionMask)
  29 #define GRAB_KEY_MASK (KeyPressMask | KeyReleaseMask)
  30
  31 #define MASK_LIST_SIZE 8
  32
  33 /*! A list of all possible combinations of keyboard lock masks */
  34 static unsigned int mask_list[MASK_LIST_SIZE];
  35
  36 gboolean grab_keyboard(gboolean grab)
  37 {
  38     static guint kgrabs = 0;
  39     gboolean ret = FALSE;
  40
  41     if (grab) {
  42         if (kgrabs++ == 0)
  43             ret = XGrabKeyboard(ob_display, RootWindow(ob_display, ob_screen),
  44                                 FALSE, GrabModeAsync, GrabModeAsync,
  45                                 event_lasttime) == Success;
  46         else
  47             ret = TRUE;
  48     } else if (kgrabs > 0) {
  49         if (--kgrabs == 0)
  50             XUngrabKeyboard(ob_display, event_lasttime);
  51         ret = TRUE;
  52     }
  53
  54     return ret;
  55 }
  56
  57 gboolean grab_pointer(gboolean grab, ObCursor cur)
  58 {
  59     static guint pgrabs = 0;
  60     gboolean ret = FALSE;
  61
  62     if (grab) {
  63         if (pgrabs++ == 0)
  64             ret = XGrabPointer(ob_display, screen_support_win,
  65                                False, GRAB_PTR_MASK, GrabModeAsync,
  66                                GrabModeAsync, FALSE,
  67                                ob_cursor(cur), event_lasttime) == Success;
  68         else
  69             ret = TRUE;
  70     } else if (pgrabs > 0) {
  71         if (--pgrabs == 0)
  72             XUngrabPointer(ob_display, event_lasttime);
  73         ret = TRUE;
  74     }
  75     return ret;
  76 }
  77
  78 gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win)
  79 {
  80     static guint pgrabs = 0;
  81     gboolean ret = FALSE;
  82
  83     if (grab) {
  84         if (pgrabs++ == 0)
  85             ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK,
  86                                GrabModeAsync, GrabModeAsync, TRUE,
  87                                ob_cursor(cur),
  88                                event_lasttime) == Success;
  89         else
  90             ret = TRUE;
  91     } else if (pgrabs > 0) {
  92         if (--pgrabs == 0)
  93             XUngrabPointer(ob_display, event_lasttime);
  94         ret = TRUE;
  95     }
  96     return ret;
  97 }
  98
  99 gint grab_server(gboolean grab)
 100 {
 101     static guint sgrabs = 0;
 102     if (grab) {
 103         if (sgrabs++ == 0) {
 104             XGrabServer(ob_display);
 105             XSync(ob_display, FALSE);
 106         }
 107     } else if (sgrabs > 0) {
 108         if (--sgrabs == 0) {
 109             XUngrabServer(ob_display);
 110             XFlush(ob_display);
 111         }
 112     }
 113     return sgrabs;
 114 }
 115
 116 void grab_startup(gboolean reconfig)
 117 {
 118     guint i = 0;
 119
 120     if (reconfig) return;
 121
 122     mask_list[i++] = 0;
 123     mask_list[i++] = LockMask;
 124     mask_list[i++] = NumLockMask;
 125     mask_list[i++] = LockMask | NumLockMask;
 126     mask_list[i++] = ScrollLockMask;
 127     mask_list[i++] = ScrollLockMask | LockMask;
 128     mask_list[i++] = ScrollLockMask | NumLockMask;
 129     mask_list[i++] = ScrollLockMask | LockMask | NumLockMask;
 130     g_assert(i == MASK_LIST_SIZE);
 131 }
 132
 133 void grab_shutdown(gboolean reconfig)
 134 {
 135     if (reconfig) return;
 136
 137     while (grab_keyboard(FALSE));
 138     while (grab_pointer(FALSE, OB_CURSOR_NONE));
 139     while (grab_pointer_window(FALSE, OB_CURSOR_NONE, None));
 140     while (grab_server(FALSE));
 141 }
 142
 143 void grab_button_full(guint button, guint state, Window win, guint mask,
 144                       int pointer_mode, ObCursor cur)
 145 {
 146     guint i;
 147
 148     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 149     xerror_occured = FALSE;
 150     for (i = 0; i < MASK_LIST_SIZE; ++i)
 151         XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
 152                     pointer_mode, GrabModeSync, None, ob_cursor(cur));
 153     xerror_set_ignore(FALSE);
 154     if (xerror_occured)
 155         g_warning("failed to grab button %d modifiers %d", button, state);
 156 }
 157
 158 void grab_button(guint button, guint state, Window win, guint mask)
 159 {
 160     grab_button_full(button, state, win, mask, GrabModeAsync, OB_CURSOR_NONE);
 161 }
 162
 163 void ungrab_button(guint button, guint state, Window win)
 164 {
 165     guint i;
 166
 167     for (i = 0; i < MASK_LIST_SIZE; ++i)
 168         XUngrabButton(ob_display, button, state | mask_list[i], win);
 169 }
 170
 171 void grab_key(guint keycode, guint state, Window win, int keyboard_mode)
 172 {
 173     guint i;
 174
 175     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 176     xerror_occured = FALSE;
 177     for (i = 0; i < MASK_LIST_SIZE; ++i)
 178         XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE,
 179                  GrabModeAsync, keyboard_mode);
 180     xerror_set_ignore(FALSE);
 181     if (xerror_occured)
 182         g_warning("failed to grab keycode %d modifiers %d", keycode, state);
 183 }
 184
 185 void ungrab_all_keys(Window win)
 186 {
 187     XUngrabKey(ob_display, AnyKey, AnyModifier, win);
 188 }