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-rw-r--r--maximus/tomboykeybinder.c337
1 files changed, 337 insertions, 0 deletions
diff --git a/maximus/tomboykeybinder.c b/maximus/tomboykeybinder.c
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+/* 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_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);
+
+ 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);
+
+ 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;
+}
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