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
  39 gboolean grab_on_keyboard()
  40 {
  41     return kgrabs > 0;
  42 }
  43
  44 gboolean grab_on_pointer()
  45 {
  46     return pgrabs > 0;
  47 }
  48
  49 gboolean grab_keyboard(gboolean grab)
  50 {
  51     gboolean ret = FALSE;
  52
  53     if (grab) {
  54         if (kgrabs++ == 0) {
  55             ret = XGrabKeyboard(ob_display, RootWindow(ob_display, ob_screen),
  56                                 FALSE, GrabModeAsync, GrabModeAsync,
  57                                 event_curtime) == Success;
  58             if (!ret)
  59                 --kgrabs;
  60         } else
  61             ret = TRUE;
  62     } else if (kgrabs > 0) {
  63         if (--kgrabs == 0)
  64             XUngrabKeyboard(ob_display, event_curtime);
  65         ret = TRUE;
  66     }
  67
  68     return ret;
  69 }
  70
  71 gboolean grab_pointer(gboolean grab, ObCursor cur)
  72 {
  73     gboolean ret = FALSE;
  74
  75     if (grab) {
  76         if (pgrabs++ == 0) {
  77             ret = XGrabPointer(ob_display, screen_support_win,
  78                                False, GRAB_PTR_MASK, GrabModeAsync,
  79                                GrabModeAsync, None,
  80                                ob_cursor(cur), event_curtime) == Success;
  81             if (!ret)
  82                 --pgrabs;
  83         } else
  84             ret = TRUE;
  85     } else if (pgrabs > 0) {
  86         if (--pgrabs == 0) {
  87             XUngrabPointer(ob_display, event_curtime);
  88         }
  89         ret = TRUE;
  90     }
  91     return ret;
  92 }
  93
  94 gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win)
  95 {
  96     gboolean ret = FALSE;
  97
  98     if (grab) {
  99         if (pgrabs++ == 0) {
 100             ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK,
 101                                GrabModeAsync, GrabModeAsync, None,
 102                                ob_cursor(cur),
 103                                event_curtime) == Success;
 104             if (!ret)
 105                 --pgrabs;
 106         } else
 107             ret = TRUE;
 108     } else if (pgrabs > 0) {
 109         if (--pgrabs == 0) {
 110             XUngrabPointer(ob_display, event_curtime);
 111         }
 112         ret = TRUE;
 113     }
 114     return ret;
 115 }
 116
 117 gint grab_server(gboolean grab)
 118 {
 119     static guint sgrabs = 0;
 120     if (grab) {
 121         if (sgrabs++ == 0) {
 122             XGrabServer(ob_display);
 123             XSync(ob_display, FALSE);
 124         }
 125     } else if (sgrabs > 0) {
 126         if (--sgrabs == 0) {
 127             XUngrabServer(ob_display);
 128             XFlush(ob_display);
 129         }
 130     }
 131     return sgrabs;
 132 }
 133
 134 void grab_startup(gboolean reconfig)
 135 {
 136     guint i = 0;
 137
 138     if (reconfig) return;
 139
 140     mask_list[i++] = 0;
 141     mask_list[i++] = LockMask;
 142     mask_list[i++] = NumLockMask;
 143     mask_list[i++] = LockMask | NumLockMask;
 144     mask_list[i++] = ScrollLockMask;
 145     mask_list[i++] = ScrollLockMask | LockMask;
 146     mask_list[i++] = ScrollLockMask | NumLockMask;
 147     mask_list[i++] = ScrollLockMask | LockMask | NumLockMask;
 148     g_assert(i == MASK_LIST_SIZE);
 149 }
 150
 151 void grab_shutdown(gboolean reconfig)
 152 {
 153     if (reconfig) return;
 154
 155     while (grab_keyboard(FALSE));
 156     while (grab_pointer(FALSE, OB_CURSOR_NONE));
 157     while (grab_pointer_window(FALSE, OB_CURSOR_NONE, None));
 158     while (grab_server(FALSE));
 159 }
 160
 161 void grab_button_full(guint button, guint state, Window win, guint mask,
 162                       gint pointer_mode, ObCursor cur)
 163 {
 164     guint i;
 165
 166     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 167     xerror_occured = FALSE;
 168     for (i = 0; i < MASK_LIST_SIZE; ++i)
 169         XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
 170                     pointer_mode, GrabModeSync, None, ob_cursor(cur));
 171     xerror_set_ignore(FALSE);
 172     if (xerror_occured)
 173         g_warning("failed to grab button %d modifiers %d", button, state);
 174 }
 175
 176 void grab_button(guint button, guint state, Window win, guint mask)
 177 {
 178     grab_button_full(button, state, win, mask, GrabModeAsync, OB_CURSOR_NONE);
 179 }
 180
 181 void ungrab_button(guint button, guint state, Window win)
 182 {
 183     guint i;
 184
 185     for (i = 0; i < MASK_LIST_SIZE; ++i)
 186         XUngrabButton(ob_display, button, state | mask_list[i], win);
 187 }
 188
 189 void grab_key(guint keycode, guint state, Window win, gint keyboard_mode)
 190 {
 191     guint i;
 192
 193     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 194     xerror_occured = FALSE;
 195     for (i = 0; i < MASK_LIST_SIZE; ++i)
 196         XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE,
 197                  GrabModeAsync, keyboard_mode);
 198     xerror_set_ignore(FALSE);
 199     if (xerror_occured)
 200         g_warning("failed to grab keycode %d modifiers %d", keycode, state);
 201 }
 202
 203 void ungrab_all_keys(Window win)
 204 {
 205     XUngrabKey(ob_display, AnyKey, AnyModifier, win);
 206 }