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) 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 guint mask_list[MASK_LIST_SIZE];
  35 static guint kgrabs = 0;
  36 static guint pgrabs = 0;
  37
  38 gboolean grab_on_keyboard()
  39 {
  40     return kgrabs > 0;
  41 }
  42
  43 gboolean grab_on_pointer()
  44 {
  45     return pgrabs > 0;
  46 }
  47
  48 gboolean grab_keyboard(gboolean grab)
  49 {
  50     gboolean ret = FALSE;
  51
  52     if (grab) {
  53         if (kgrabs++ == 0) {
  54             ret = XGrabKeyboard(ob_display, RootWindow(ob_display, ob_screen),
  55                                 FALSE, GrabModeAsync, GrabModeAsync,
  56                                 event_lasttime) == Success;
  57             if (!ret)
  58                 --kgrabs;
  59         } else
  60             ret = TRUE;
  61     } else if (kgrabs > 0) {
  62         if (--kgrabs == 0)
  63             XUngrabKeyboard(ob_display, event_lasttime);
  64         ret = TRUE;
  65     }
  66
  67     return ret;
  68 }
  69
  70 gboolean grab_pointer(gboolean grab, ObCursor cur)
  71 {
  72     gboolean ret = FALSE;
  73
  74     if (grab) {
  75         if (pgrabs++ == 0) {
  76             ret = XGrabPointer(ob_display, screen_support_win,
  77                                False, GRAB_PTR_MASK, GrabModeAsync,
  78                                GrabModeAsync, FALSE,
  79                                ob_cursor(cur), event_lasttime) == Success;
  80             if (!ret)
  81                 --pgrabs;
  82         } else
  83             ret = TRUE;
  84     } else if (pgrabs > 0) {
  85         if (--pgrabs == 0) {
  86             XUngrabPointer(ob_display, event_lasttime);
  87         }
  88         ret = TRUE;
  89     }
  90     return ret;
  91 }
  92
  93 gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win)
  94 {
  95     gboolean ret = FALSE;
  96
  97     if (grab) {
  98         if (pgrabs++ == 0) {
  99             ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK,
 100                                GrabModeAsync, GrabModeAsync, TRUE,
 101                                ob_cursor(cur),
 102                                event_lasttime) == Success;
 103             if (!ret)
 104                 --pgrabs;
 105         } else
 106             ret = TRUE;
 107     } else if (pgrabs > 0) {
 108         if (--pgrabs == 0) {
 109             XUngrabPointer(ob_display, event_lasttime);
 110         }
 111         ret = TRUE;
 112     }
 113     return ret;
 114 }
 115
 116 gint grab_server(gboolean grab)
 117 {
 118     static guint sgrabs = 0;
 119     if (grab) {
 120         if (sgrabs++ == 0) {
 121             XGrabServer(ob_display);
 122             XSync(ob_display, FALSE);
 123         }
 124     } else if (sgrabs > 0) {
 125         if (--sgrabs == 0) {
 126             XUngrabServer(ob_display);
 127             XFlush(ob_display);
 128         }
 129     }
 130     return sgrabs;
 131 }
 132
 133 void grab_startup(gboolean reconfig)
 134 {
 135     guint i = 0;
 136
 137     if (reconfig) return;
 138
 139     mask_list[i++] = 0;
 140     mask_list[i++] = LockMask;
 141     mask_list[i++] = NumLockMask;
 142     mask_list[i++] = LockMask | NumLockMask;
 143     mask_list[i++] = ScrollLockMask;
 144     mask_list[i++] = ScrollLockMask | LockMask;
 145     mask_list[i++] = ScrollLockMask | NumLockMask;
 146     mask_list[i++] = ScrollLockMask | LockMask | NumLockMask;
 147     g_assert(i == MASK_LIST_SIZE);
 148 }
 149
 150 void grab_shutdown(gboolean reconfig)
 151 {
 152     if (reconfig) return;
 153
 154     while (grab_keyboard(FALSE));
 155     while (grab_pointer(FALSE, OB_CURSOR_NONE));
 156     while (grab_pointer_window(FALSE, OB_CURSOR_NONE, None));
 157     while (grab_server(FALSE));
 158 }
 159
 160 void grab_button_full(guint button, guint state, Window win, guint mask,
 161                       gint pointer_mode, ObCursor cur)
 162 {
 163     guint i;
 164
 165     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 166     xerror_occured = FALSE;
 167     for (i = 0; i < MASK_LIST_SIZE; ++i)
 168         XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
 169                     pointer_mode, GrabModeSync, None, ob_cursor(cur));
 170     xerror_set_ignore(FALSE);
 171     if (xerror_occured)
 172         g_warning("failed to grab button %d modifiers %d", button, state);
 173 }
 174
 175 void grab_button(guint button, guint state, Window win, guint mask)
 176 {
 177     grab_button_full(button, state, win, mask, GrabModeAsync, OB_CURSOR_NONE);
 178 }
 179
 180 void ungrab_button(guint button, guint state, Window win)
 181 {
 182     guint i;
 183
 184     for (i = 0; i < MASK_LIST_SIZE; ++i)
 185         XUngrabButton(ob_display, button, state | mask_list[i], win);
 186 }
 187
 188 void grab_key(guint keycode, guint state, Window win, gint keyboard_mode)
 189 {
 190     guint i;
 191
 192     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 193     xerror_occured = FALSE;
 194     for (i = 0; i < MASK_LIST_SIZE; ++i)
 195         XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE,
 196                  GrabModeAsync, keyboard_mode);
 197     xerror_set_ignore(FALSE);
 198     if (xerror_occured)
 199         g_warning("failed to grab keycode %d modifiers %d", keycode, state);
 200 }
 201
 202 void ungrab_all_keys(Window win)
 203 {
 204     XUngrabKey(ob_display, AnyKey, AnyModifier, win);
 205 }