From c3b4e76655aa6b675ba01f5af12ff375a8cd2a8c Mon Sep 17 00:00:00 2001 From: Stefano Karapetsas Date: Fri, 23 Dec 2011 22:59:38 +0100 Subject: import from Mate-Extra repository --- src/tomboykeybinder.c | 340 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 340 insertions(+) create mode 100644 src/tomboykeybinder.c (limited to 'src/tomboykeybinder.c') diff --git a/src/tomboykeybinder.c b/src/tomboykeybinder.c new file mode 100644 index 0000000..7aa7168 --- /dev/null +++ b/src/tomboykeybinder.c @@ -0,0 +1,340 @@ +/* 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 + +#include +#include +#include +#include + +#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, + }; + guint 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_XWINDOW (rootwin), + False, + GrabModeAsync, + GrabModeAsync); + } else { + XUngrabKey (GDK_WINDOW_XDISPLAY (rootwin), + binding->keycode, + binding->modifiers | mod_masks [i], + GDK_WINDOW_XWINDOW (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); + if (binding->modifiers == 0) + return FALSE; + + 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 G_GNUC_UNUSED, + gpointer data G_GNUC_UNUSED) +{ + 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 G_GNUC_UNUSED) +{ + 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); + + 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; +} -- cgit v1.2.1