/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- * * Copyright (C) 2001-2003 Bastien Nocera <hadess@hadess.net> * Copyright (C) 2006-2007 William Jon McCann <mccann@jhu.edu> * Copyright (C) 2008 Jens Granseuer <jensgr@gmx.net> * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. * */ #include "config.h" #include <gdk/gdk.h> #include <gdk/gdkx.h> #ifdef HAVE_X11_EXTENSIONS_XKB_H #include <X11/XKBlib.h> #include <X11/extensions/XKB.h> #include <gdk/gdkkeysyms.h> #endif #include "eggaccelerators.h" #include "msd-keygrab.h" /* these are the mods whose combinations are ignored by the keygrabbing code */ static GdkModifierType msd_ignored_mods = 0; /* these are the ones we actually use for global keys, we always only check * for these set */ static GdkModifierType msd_used_mods = 0; static void setup_modifiers (void) { if (msd_used_mods == 0 || msd_ignored_mods == 0) { GdkModifierType dynmods; /* default modifiers */ msd_ignored_mods = \ 0x2000 /*Xkb modifier*/ | GDK_LOCK_MASK | GDK_HYPER_MASK; msd_used_mods = \ GDK_SHIFT_MASK | GDK_CONTROL_MASK |\ GDK_MOD1_MASK | GDK_MOD2_MASK | GDK_MOD3_MASK | GDK_MOD4_MASK |\ GDK_MOD5_MASK | GDK_SUPER_MASK | GDK_META_MASK; /* NumLock can be assigned to varying keys so we need to * resolve and ignore it specially */ dynmods = 0; egg_keymap_resolve_virtual_modifiers (gdk_keymap_get_default (), EGG_VIRTUAL_NUM_LOCK_MASK, &dynmods); msd_ignored_mods |= dynmods; msd_used_mods &= ~dynmods; } } static void grab_key_real (guint keycode, GdkWindow *root, gboolean grab, int mask) { if (grab) { XGrabKey (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), keycode, mask, GDK_WINDOW_XID (root), True, GrabModeAsync, GrabModeAsync); } else { XUngrabKey (GDK_DISPLAY_XDISPLAY(gdk_display_get_default()), keycode, mask, GDK_WINDOW_XID (root)); } } /* Grab the key. In order to ignore MSD_IGNORED_MODS we need to grab * all combinations of the ignored modifiers and those actually used * for the binding (if any). * * inspired by all_combinations from mate-panel/mate-panel/global-keys.c * * This may generate X errors. The correct way to use this is like: * * gdk_error_trap_push (); * * grab_key_unsafe (key, grab, screens); * * gdk_flush (); * if (gdk_error_trap_pop ()) * g_warning ("Grab failed, another application may already have access to key '%u'", * key->keycode); * * This is not done in the function itself, to allow doing multiple grab_key * operations with one flush only. */ #define N_BITS 32 void grab_key_unsafe (Key *key, gboolean grab, GSList *screens) { int indexes[N_BITS]; /* indexes of bits we need to flip */ int i; int bit; int bits_set_cnt; int uppervalue; guint mask; setup_modifiers (); mask = msd_ignored_mods & ~key->state & GDK_MODIFIER_MASK; bit = 0; /* store the indexes of all set bits in mask in the array */ for (i = 0; mask; ++i, mask >>= 1) { if (mask & 0x1) { indexes[bit++] = i; } } bits_set_cnt = bit; uppervalue = 1 << bits_set_cnt; /* grab all possible modifier combinations for our mask */ for (i = 0; i < uppervalue; ++i) { GSList *l; int j; int result = 0; /* map bits in the counter to those in the mask */ for (j = 0; j < bits_set_cnt; ++j) { if (i & (1 << j)) { result |= (1 << indexes[j]); } } for (l = screens; l; l = l->next) { GdkScreen *screen = l->data; guint *code; for (code = key->keycodes; *code; ++code) { grab_key_real (*code, gdk_screen_get_root_window (screen), grab, result | key->state); } } } } static gboolean have_xkb (Display *dpy) { static int have_xkb = -1; if (have_xkb == -1) { #ifdef HAVE_X11_EXTENSIONS_XKB_H int opcode, error_base, major, minor, xkb_event_base; have_xkb = XkbQueryExtension (dpy, &opcode, &xkb_event_base, &error_base, &major, &minor) && XkbUseExtension (dpy, &major, &minor); #else have_xkb = 0; #endif } return have_xkb; } gboolean key_uses_keycode (const Key *key, guint keycode) { if (key->keycodes != NULL) { guint *c; for (c = key->keycodes; *c; ++c) { if (*c == keycode) return TRUE; } } return FALSE; } gboolean match_key (Key *key, XEvent *event) { guint keyval; GdkModifierType consumed; gint group; if (key == NULL) return FALSE; setup_modifiers (); #ifdef HAVE_X11_EXTENSIONS_XKB_H if (have_xkb (event->xkey.display)) group = XkbGroupForCoreState (event->xkey.state); else #endif group = (event->xkey.state & GDK_Mode_switch) ? 1 : 0; /* Check if we find a keysym that matches our current state */ if (gdk_keymap_translate_keyboard_state (NULL, event->xkey.keycode, event->xkey.state, group, &keyval, NULL, NULL, &consumed)) { guint lower, upper; gdk_keyval_convert_case (keyval, &lower, &upper); /* If we are checking against the lower version of the * keysym, we might need the Shift state for matching, * so remove it from the consumed modifiers */ if (lower == key->keysym) consumed &= ~GDK_SHIFT_MASK; return ((lower == key->keysym || upper == key->keysym) && (event->xkey.state & ~consumed & msd_used_mods) == key->state); } /* The key we passed doesn't have a keysym, so try with just the keycode */ return (key != NULL && key->state == (event->xkey.state & msd_used_mods) && key_uses_keycode (key, event->xkey.keycode)); }