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