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 gboolean grab_on_keyboard()
  42 {
  43     return kgrabs > 0;
  44 }
  45
  46 gboolean grab_on_pointer()
  47 {
  48     return pgrabs > 0;
  49 }
  50
  51 gboolean grab_keyboard(gboolean grab)
  52 {
  53     gboolean ret = FALSE;
  54
  55     if (grab) {
  56         if (kgrabs++ == 0) {
  57             ret = XGrabKeyboard(ob_display, RootWindow(ob_display, ob_screen),
  58                                 FALSE, GrabModeAsync, GrabModeAsync,
  59                                 event_curtime) == Success;
  60             if (!ret)
  61                 --kgrabs;
  62             else
  63                 grab_time = event_curtime;
  64         } else
  65             ret = TRUE;
  66     } else if (kgrabs > 0) {
  67         if (--kgrabs == 0) {
  68             Time t = event_curtime;
  69             if (t != 0 && t < grab_time)
  70                 t = grab_time;
  71             XUngrabKeyboard(ob_display, t);
  72         }
  73         ret = TRUE;
  74     }
  75
  76     return ret;
  77 }
  78
  79 gboolean grab_pointer(gboolean grab, ObCursor cur)
  80 {
  81     gboolean ret = FALSE;
  82
  83     if (grab) {
  84         if (pgrabs++ == 0) {
  85             ret = XGrabPointer(ob_display, screen_support_win,
  86                                False, GRAB_PTR_MASK, GrabModeAsync,
  87                                GrabModeAsync, None,
  88                                ob_cursor(cur), event_curtime) == Success;
  89             if (!ret)
  90                 --pgrabs;
  91             else
  92                 grab_time = event_curtime;
  93         } else
  94             ret = TRUE;
  95     } else if (pgrabs > 0) {
  96         if (--pgrabs == 0) {
  97             Time t = event_curtime;
  98             if (t != 0 && t < grab_time)
  99                 t = grab_time;
 100             XUngrabPointer(ob_display, event_curtime);
 101         }
 102         ret = TRUE;
 103     }
 104     return ret;
 105 }
 106
 107 gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win)
 108 {
 109     gboolean ret = FALSE;
 110
 111     if (grab) {
 112         if (pgrabs++ == 0) {
 113             ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK,
 114                                GrabModeAsync, GrabModeAsync, None,
 115                                ob_cursor(cur),
 116                                event_curtime) == Success;
 117             if (!ret)
 118                 --pgrabs;
 119             else
 120                 grab_time = event_curtime;
 121         } else
 122             ret = TRUE;
 123     } else if (pgrabs > 0) {
 124         if (--pgrabs == 0) {
 125             Time t = event_curtime;
 126             if (t != 0 && t < grab_time)
 127                 t = grab_time;
 128             XUngrabPointer(ob_display, event_curtime);
 129         }
 130         ret = TRUE;
 131     }
 132     return ret;
 133 }
 134
 135 gint grab_server(gboolean grab)
 136 {
 137     static guint sgrabs = 0;
 138     if (grab) {
 139         if (sgrabs++ == 0) {
 140             XGrabServer(ob_display);
 141             XSync(ob_display, FALSE);
 142         }
 143     } else if (sgrabs > 0) {
 144         if (--sgrabs == 0) {
 145             XUngrabServer(ob_display);
 146             XFlush(ob_display);
 147         }
 148     }
 149     return sgrabs;
 150 }
 151
 152 void grab_startup(gboolean reconfig)
 153 {
 154     guint i = 0;
 155
 156     if (reconfig) return;
 157
 158     mask_list[i++] = 0;
 159     mask_list[i++] = LockMask;
 160     mask_list[i++] = NumLockMask;
 161     mask_list[i++] = LockMask | NumLockMask;
 162     mask_list[i++] = ScrollLockMask;
 163     mask_list[i++] = ScrollLockMask | LockMask;
 164     mask_list[i++] = ScrollLockMask | NumLockMask;
 165     mask_list[i++] = ScrollLockMask | LockMask | NumLockMask;
 166     g_assert(i == MASK_LIST_SIZE);
 167 }
 168
 169 void grab_shutdown(gboolean reconfig)
 170 {
 171     if (reconfig) return;
 172
 173     while (grab_keyboard(FALSE));
 174     while (grab_pointer(FALSE, OB_CURSOR_NONE));
 175     while (grab_pointer_window(FALSE, OB_CURSOR_NONE, None));
 176     while (grab_server(FALSE));
 177 }
 178
 179 void grab_button_full(guint button, guint state, Window win, guint mask,
 180                       gint pointer_mode, ObCursor cur)
 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         XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
 188                     pointer_mode, GrabModeSync, None, ob_cursor(cur));
 189     xerror_set_ignore(FALSE);
 190     if (xerror_occured)
 191         g_warning("failed to grab button %d modifiers %d", button, state);
 192 }
 193
 194 void grab_button(guint button, guint state, Window win, guint mask)
 195 {
 196     grab_button_full(button, state, win, mask, GrabModeAsync, OB_CURSOR_NONE);
 197 }
 198
 199 void ungrab_button(guint button, guint state, Window win)
 200 {
 201     guint i;
 202
 203     for (i = 0; i < MASK_LIST_SIZE; ++i)
 204         XUngrabButton(ob_display, button, state | mask_list[i], win);
 205 }
 206
 207 void grab_key(guint keycode, guint state, Window win, gint keyboard_mode)
 208 {
 209     guint i;
 210
 211     xerror_set_ignore(TRUE); /* can get BadAccess' from these */
 212     xerror_occured = FALSE;
 213     for (i = 0; i < MASK_LIST_SIZE; ++i)
 214         XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE,
 215                  GrabModeAsync, keyboard_mode);
 216     xerror_set_ignore(FALSE);
 217     if (xerror_occured)
 218         g_warning("failed to grab keycode %d modifiers %d", keycode, state);
 219 }
 220
 221 void ungrab_all_keys(Window win)
 222 {
 223     XUngrabKey(ob_display, AnyKey, AnyModifier, win);
 224 }