/* tomboykeybinder.c * Copyright (C) 2008 Novell * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA */ #include <string.h> #include <gdk/gdk.h> #include <gdk/gdkwindow.h> #include <gdk/gdkx.h> #include <X11/Xlib.h> #include "eggaccelerators.h" #include "tomboykeybinder.h" /* Uncomment the next line to print a debug trace. */ /* #define DEBUG */ #ifdef DEBUG # define TRACE(x) x #else # define TRACE(x) do {} while (FALSE); #endif typedef struct _Binding { TomboyBindkeyHandler handler; gpointer user_data; char *keystring; uint keycode; uint modifiers; } Binding; static GSList *bindings = NULL; static guint32 last_event_time = 0; static gboolean processing_event = FALSE; static guint num_lock_mask, caps_lock_mask, scroll_lock_mask; static void lookup_ignorable_modifiers (GdkKeymap *keymap) { egg_keymap_resolve_virtual_modifiers (keymap, EGG_VIRTUAL_LOCK_MASK, &caps_lock_mask); egg_keymap_resolve_virtual_modifiers (keymap, EGG_VIRTUAL_NUM_LOCK_MASK, &num_lock_mask); egg_keymap_resolve_virtual_modifiers (keymap, EGG_VIRTUAL_SCROLL_LOCK_MASK, &scroll_lock_mask); } static void grab_ungrab_with_ignorable_modifiers (GdkWindow *rootwin, Binding *binding, gboolean grab) { guint mod_masks [] = { 0, /* modifier only */ num_lock_mask, caps_lock_mask, scroll_lock_mask, num_lock_mask | caps_lock_mask, num_lock_mask | scroll_lock_mask, caps_lock_mask | scroll_lock_mask, num_lock_mask | caps_lock_mask | scroll_lock_mask, }; int i; for (i = 0; i < G_N_ELEMENTS (mod_masks); i++) { if (grab) { XGrabKey (GDK_WINDOW_XDISPLAY (rootwin), binding->keycode, binding->modifiers | mod_masks [i], GDK_WINDOW_XID (rootwin), False, GrabModeAsync, GrabModeAsync); } else { XUngrabKey (GDK_WINDOW_XDISPLAY (rootwin), binding->keycode, binding->modifiers | mod_masks [i], GDK_WINDOW_XID (rootwin)); } } } static gboolean do_grab_key (Binding *binding) { GdkKeymap *keymap = gdk_keymap_get_default (); GdkWindow *rootwin = gdk_get_default_root_window (); EggVirtualModifierType virtual_mods = 0; guint keysym = 0; if (keymap == NULL || rootwin == NULL) return FALSE; if (!egg_accelerator_parse_virtual (binding->keystring, &keysym, &virtual_mods)) return FALSE; TRACE (g_print ("Got accel %d, %d\n", keysym, virtual_mods)); binding->keycode = XKeysymToKeycode (GDK_WINDOW_XDISPLAY (rootwin), keysym); if (binding->keycode == 0) return FALSE; TRACE (g_print ("Got keycode %d\n", binding->keycode)); egg_keymap_resolve_virtual_modifiers (keymap, virtual_mods, &binding->modifiers); TRACE (g_print ("Got modmask %d\n", binding->modifiers)); gdk_error_trap_push (); grab_ungrab_with_ignorable_modifiers (rootwin, binding, TRUE /* grab */); gdk_flush (); if (gdk_error_trap_pop ()) { g_warning ("Binding '%s' failed!\n", binding->keystring); return FALSE; } return TRUE; } static gboolean do_ungrab_key (Binding *binding) { GdkWindow *rootwin = gdk_get_default_root_window (); TRACE (g_print ("Removing grab for '%s'\n", binding->keystring)); grab_ungrab_with_ignorable_modifiers (rootwin, binding, FALSE /* ungrab */); return TRUE; } static GdkFilterReturn filter_func (GdkXEvent *gdk_xevent, GdkEvent *event, gpointer data) { GdkFilterReturn return_val = GDK_FILTER_CONTINUE; XEvent *xevent = (XEvent *) gdk_xevent; guint event_mods; GSList *iter; TRACE (g_print ("Got Event! %d, %d\n", xevent->type, event->type)); switch (xevent->type) { case KeyPress: TRACE (g_print ("Got KeyPress! keycode: %d, modifiers: %d\n", xevent->xkey.keycode, xevent->xkey.state)); /* * Set the last event time for use when showing * windows to avoid anti-focus-stealing code. */ processing_event = TRUE; last_event_time = xevent->xkey.time; event_mods = xevent->xkey.state & ~(num_lock_mask | caps_lock_mask | scroll_lock_mask); for (iter = bindings; iter != NULL; iter = iter->next) { Binding *binding = (Binding *) iter->data; if (binding->keycode == xevent->xkey.keycode && binding->modifiers == event_mods) { TRACE (g_print ("Calling handler for '%s'...\n", binding->keystring)); (binding->handler) (binding->keystring, binding->user_data); } } processing_event = FALSE; break; case KeyRelease: TRACE (g_print ("Got KeyRelease! \n")); break; } return return_val; } static void keymap_changed (GdkKeymap *map) { GdkKeymap *keymap = gdk_keymap_get_default (); GSList *iter; TRACE (g_print ("Keymap changed! Regrabbing keys...")); for (iter = bindings; iter != NULL; iter = iter->next) { Binding *binding = (Binding *) iter->data; do_ungrab_key (binding); } lookup_ignorable_modifiers (keymap); for (iter = bindings; iter != NULL; iter = iter->next) { Binding *binding = (Binding *) iter->data; do_grab_key (binding); } } void tomboy_keybinder_init (void) { GdkKeymap *keymap = gdk_keymap_get_default (); GdkWindow *rootwin = gdk_get_default_root_window (); lookup_ignorable_modifiers (keymap); gdk_window_add_filter (rootwin, filter_func, NULL); g_signal_connect (keymap, "keys_changed", G_CALLBACK (keymap_changed), NULL); } void tomboy_keybinder_bind (const char *keystring, TomboyBindkeyHandler handler, gpointer user_data) { Binding *binding; gboolean success; binding = g_new0 (Binding, 1); binding->keystring = g_strdup (keystring); binding->handler = handler; binding->user_data = user_data; /* Sets the binding's keycode and modifiers */ success = do_grab_key (binding); if (success) { bindings = g_slist_prepend (bindings, binding); } else { g_free (binding->keystring); g_free (binding); } } void tomboy_keybinder_unbind (const char *keystring, TomboyBindkeyHandler handler) { GSList *iter; for (iter = bindings; iter != NULL; iter = iter->next) { Binding *binding = (Binding *) iter->data; if (strcmp (keystring, binding->keystring) != 0 || handler != binding->handler) continue; do_ungrab_key (binding); bindings = g_slist_remove (bindings, binding); g_free (binding->keystring); g_free (binding); break; } } /* * From eggcellrenderkeys.c. */ gboolean tomboy_keybinder_is_modifier (guint keycode) { gint i; gint map_size; XModifierKeymap *mod_keymap; gboolean retval = FALSE; mod_keymap = XGetModifierMapping (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ())); map_size = 8 * mod_keymap->max_keypermod; i = 0; while (i < map_size) { if (keycode == mod_keymap->modifiermap[i]) { retval = TRUE; break; } ++i; } XFreeModifiermap (mod_keymap); return retval; } guint32 tomboy_keybinder_get_current_event_time (void) { if (processing_event) return last_event_time; else return GDK_CURRENT_TIME; }