openbox/grab.c (raw)
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/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*- grab.c for the Openbox window manager Copyright (c) 2003 Ben Jansens This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. See the COPYING file for a copy of the GNU General Public License. */ #include "grab.h" #include "openbox.h" #include "event.h" #include "xerror.h" #include "screen.h" #include <glib.h> #include <X11/Xlib.h> #define GRAB_PTR_MASK (ButtonPressMask | ButtonReleaseMask | PointerMotionMask) #define GRAB_KEY_MASK (KeyPressMask | KeyReleaseMask) #define MASK_LIST_SIZE 8 /*! A list of all possible combinations of keyboard lock masks */ static guint mask_list[MASK_LIST_SIZE]; static guint kgrabs = 0; static guint pgrabs = 0; gboolean grab_on_keyboard() { return kgrabs > 0; } gboolean grab_on_pointer() { return pgrabs > 0; } gboolean grab_keyboard(gboolean grab) { gboolean ret = FALSE; if (grab) { if (kgrabs++ == 0) { ret = XGrabKeyboard(ob_display, RootWindow(ob_display, ob_screen), FALSE, GrabModeAsync, GrabModeAsync, event_lasttime) == Success; if (!ret) --kgrabs; } else ret = TRUE; } else if (kgrabs > 0) { if (--kgrabs == 0) XUngrabKeyboard(ob_display, event_lasttime); ret = TRUE; } return ret; } gboolean grab_pointer(gboolean grab, ObCursor cur) { gboolean ret = FALSE; if (grab) { if (pgrabs++ == 0) { ret = XGrabPointer(ob_display, screen_support_win, False, GRAB_PTR_MASK, GrabModeAsync, GrabModeAsync, None, ob_cursor(cur), event_lasttime) == Success; if (!ret) --pgrabs; } else ret = TRUE; } else if (pgrabs > 0) { if (--pgrabs == 0) { XUngrabPointer(ob_display, event_lasttime); } ret = TRUE; } return ret; } gboolean grab_pointer_window(gboolean grab, ObCursor cur, Window win) { gboolean ret = FALSE; if (grab) { if (pgrabs++ == 0) { ret = XGrabPointer(ob_display, win, False, GRAB_PTR_MASK, GrabModeAsync, GrabModeAsync, None, ob_cursor(cur), event_lasttime) == Success; if (!ret) --pgrabs; } else ret = TRUE; } else if (pgrabs > 0) { if (--pgrabs == 0) { XUngrabPointer(ob_display, event_lasttime); } ret = TRUE; } return ret; } gint grab_server(gboolean grab) { static guint sgrabs = 0; if (grab) { if (sgrabs++ == 0) { XGrabServer(ob_display); XSync(ob_display, FALSE); } } else if (sgrabs > 0) { if (--sgrabs == 0) { XUngrabServer(ob_display); XFlush(ob_display); } } return sgrabs; } void grab_startup(gboolean reconfig) { guint i = 0; if (reconfig) return; mask_list[i++] = 0; mask_list[i++] = LockMask; mask_list[i++] = NumLockMask; mask_list[i++] = LockMask | NumLockMask; mask_list[i++] = ScrollLockMask; mask_list[i++] = ScrollLockMask | LockMask; mask_list[i++] = ScrollLockMask | NumLockMask; mask_list[i++] = ScrollLockMask | LockMask | NumLockMask; g_assert(i == MASK_LIST_SIZE); } void grab_shutdown(gboolean reconfig) { if (reconfig) return; while (grab_keyboard(FALSE)); while (grab_pointer(FALSE, OB_CURSOR_NONE)); while (grab_pointer_window(FALSE, OB_CURSOR_NONE, None)); while (grab_server(FALSE)); } void grab_button_full(guint button, guint state, Window win, guint mask, gint pointer_mode, ObCursor cur) { guint i; xerror_set_ignore(TRUE); /* can get BadAccess' from these */ xerror_occured = FALSE; for (i = 0; i < MASK_LIST_SIZE; ++i) XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask, pointer_mode, GrabModeSync, None, ob_cursor(cur)); xerror_set_ignore(FALSE); if (xerror_occured) g_warning("failed to grab button %d modifiers %d", button, state); } void grab_button(guint button, guint state, Window win, guint mask) { grab_button_full(button, state, win, mask, GrabModeAsync, OB_CURSOR_NONE); } void ungrab_button(guint button, guint state, Window win) { guint i; for (i = 0; i < MASK_LIST_SIZE; ++i) XUngrabButton(ob_display, button, state | mask_list[i], win); } void grab_key(guint keycode, guint state, Window win, gint keyboard_mode) { guint i; xerror_set_ignore(TRUE); /* can get BadAccess' from these */ xerror_occured = FALSE; for (i = 0; i < MASK_LIST_SIZE; ++i) XGrabKey(ob_display, keycode, state | mask_list[i], win, FALSE, GrabModeAsync, keyboard_mode); xerror_set_ignore(FALSE); if (xerror_occured) g_warning("failed to grab keycode %d modifiers %d", keycode, state); } void ungrab_all_keys(Window win) { XUngrabKey(ob_display, AnyKey, AnyModifier, win); } |