336 lines
8.5 KiB
C
336 lines
8.5 KiB
C
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#include <config.h>
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#include <string.h>
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#include <X11/keysym.h>
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#include <gdk/gdk.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkx.h>
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#include "gnome-settings-daemon.h"
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#include "gnome-settings-keybindings.h"
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/* we exclude shift, GDK_CONTROL_MASK and GDK_MOD1_MASK since we know what
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these modifiers mean
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these are the mods whose combinations are bound by the keygrabbing code */
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#define IGNORED_MODS (0x2000 /*Xkb modifier*/ | GDK_LOCK_MASK | \
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GDK_MOD2_MASK | GDK_MOD3_MASK | GDK_MOD4_MASK | GDK_MOD5_MASK)
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/* these are the ones we actually use for global keys, we always only check
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* for these set */
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#define USED_MODS (GDK_SHIFT_MASK | GDK_CONTROL_MASK | GDK_MOD1_MASK)
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#define GCONF_BINDING_DIR "/desktop/gnome/keybindings"
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typedef struct {
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guint keysym;
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guint state;
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guint keycode;
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} Key;
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typedef struct {
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char *binding_str;
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char *action;
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char *gconf_key;
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Key key;
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Key previous_key;
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} Binding;
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static GSList *binding_list = NULL;
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static gint
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compare_bindings (gconstpointer a, gconstpointer b)
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{
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Binding *key_a = (Binding*) a;
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char *key_b = (char*) b;
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return strcmp (key_b, key_a->gconf_key);
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}
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static gboolean
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parse_binding (Binding *binding)
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{
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g_return_val_if_fail (binding != NULL, FALSE);
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binding->key.keysym = 0;
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binding->key.state = 0;
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if (binding->binding_str == NULL ||
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binding->binding_str[0] == '\0' ||
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strcmp (binding->binding_str, "Disabled") == 0)
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return FALSE;
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gtk_accelerator_parse (binding->binding_str, &binding->key.keysym, &binding->key.state);
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if (binding->key.keysym == 0)
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return FALSE;
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binding->key.keycode = XKeysymToKeycode (GDK_DISPLAY (), binding->key.keysym);
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return TRUE;
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}
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gboolean
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bindings_get_entry (char *subdir)
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{
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GConfValue *value;
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Binding *new_binding;
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GSList *tmp_elem = NULL, *list = NULL, *li;
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char *gconf_key;
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char *action = NULL;
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char *key = NULL;
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g_return_val_if_fail (subdir != NULL, FALSE);
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/* value = gconf_entry_get_value (entry); */
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gconf_key = g_path_get_basename (subdir);
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if (!gconf_key)
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return FALSE;
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/* Get entries for this binding */
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list = gconf_client_all_entries (gconf_client_get_default (), subdir, NULL);
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for (li = list; li != NULL; li = li->next)
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{
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GConfEntry *entry = li->data;
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char *key_name = g_path_get_basename (gconf_entry_get_key (entry));
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if (strcmp (key_name, "action") == 0)
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{
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if (!action)
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{
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value = gconf_entry_get_value (entry);
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if (value->type != GCONF_VALUE_STRING)
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return FALSE;
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action = g_strdup (gconf_value_get_string (value));
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}
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else
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g_warning ("Key Binding (%s) has its action defined multiple times\n",
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gconf_key);
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}
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if (strcmp (key_name, "binding") == 0)
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{
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if (!key)
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{
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value = gconf_entry_get_value (entry);
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if (value->type != GCONF_VALUE_STRING)
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return FALSE;
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key = g_strdup (gconf_value_get_string (value));
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}
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else
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g_warning ("Key Binding (%s) has its binding defined multiple times\n",
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gconf_key);
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}
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}
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if (!action || !key)
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{
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g_warning ("Key Binding (%s) is incomplete\n", gconf_key);
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return FALSE;
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}
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tmp_elem = g_slist_find_custom (binding_list, gconf_key,
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compare_bindings);
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if (!tmp_elem)
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new_binding = g_new0 (Binding, 1);
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else
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{
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new_binding = (Binding*) tmp_elem->data;
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g_free (new_binding->binding_str);
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g_free (new_binding->action);
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}
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new_binding->binding_str = key;
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new_binding->action = action;
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new_binding->gconf_key = gconf_key;
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new_binding->previous_key.keysym = new_binding->key.keysym;
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new_binding->previous_key.state = new_binding->key.state;
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new_binding->previous_key.keycode = new_binding->key.keycode;
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if (parse_binding (new_binding))
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binding_list = g_slist_append (binding_list, new_binding);
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else
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{
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g_warning ("Binding (%s) is invalid\n", gconf_key);
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g_free (new_binding->binding_str);
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g_free (new_binding->action);
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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key_already_used (Binding *binding)
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{
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GSList *li;
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for (li = binding_list; li != NULL; li = li->next)
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{
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Binding *tmp_binding = (Binding*) li->data;
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if (tmp_binding != binding && tmp_binding->key.keycode == binding->key.keycode &&
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tmp_binding->key.state == binding->key.state)
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return TRUE;
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}
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return FALSE;
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}
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/* inspired from all_combinations from gnome-panel/gnome-panel/global-keys.c */
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#define N_BITS 32
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static void
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do_grab (gboolean grab,
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Key *key)
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{
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int indexes[N_BITS];/*indexes of bits we need to flip*/
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int i, bit, bits_set_cnt;
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int uppervalue;
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guint mask_to_traverse = IGNORED_MODS & ~ key->state;
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bit = 0;
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for (i = 0; i < N_BITS; i++) {
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if (mask_to_traverse & (1<<i))
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indexes[bit++]=i;
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}
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bits_set_cnt = bit;
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uppervalue = 1<<bits_set_cnt;
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for (i = 0; i < uppervalue; i++) {
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int j, result = 0;
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for (j = 0; j < bits_set_cnt; j++) {
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if (i & (1<<j))
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result |= (1<<indexes[j]);
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}
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/* FIXME need to grab for all root windows for the display */
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if (grab)
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XGrabKey (GDK_DISPLAY(), key->keycode, (result | key->state),
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GDK_ROOT_WINDOW(), True, GrabModeAsync, GrabModeAsync);
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else
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XUngrabKey(GDK_DISPLAY(), key->keycode, (result | key->state),
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GDK_ROOT_WINDOW());
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}
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}
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void
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binding_register_keys ()
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{
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GSList *li;
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gdk_error_trap_push();
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/* Now check for changes and grab new key if not already used */
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for (li = binding_list ; li != NULL; li = li->next)
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{
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Binding *binding = (Binding *) li->data;
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if (binding->previous_key.keycode != binding->key.keycode ||
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binding->previous_key.state != binding->key.state)
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{
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/* Ungrab key if it changed and not clashing with previously set binding */
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if (!key_already_used (binding))
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{
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if (binding->previous_key.keycode)
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do_grab (FALSE, &binding->previous_key);
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do_grab (TRUE, &binding->key);
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binding->previous_key.keysym = binding->key.keysym;
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binding->previous_key.state = binding->key.state;
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binding->previous_key.keycode = binding->key.keycode;
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}
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else
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g_warning ("Key Binding (%s) is already in use\n", binding->binding_str);
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}
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}
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gdk_flush ();
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gdk_error_trap_pop();
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}
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static void
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bindings_callback (GConfEntry *entry)
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{
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/* ensure we get binding dir not a sub component */
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gchar** key_elems = g_strsplit (gconf_entry_get_key (entry), "/", 15);
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gchar* binding_entry = g_strdup_printf ("/%s/%s/%s/%s", key_elems[1],
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key_elems[2], key_elems[3],
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key_elems[4]);
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g_strfreev (key_elems);
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bindings_get_entry (binding_entry);
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g_free (binding_entry);
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binding_register_keys ();
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}
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GdkFilterReturn
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keybindings_filter (GdkXEvent *gdk_xevent,
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GdkEvent *event,
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gpointer data)
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{
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XEvent *xevent = (XEvent *)gdk_xevent;
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guint keycode, state;
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GSList *li;
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if(xevent->type != KeyPress)
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return GDK_FILTER_CONTINUE;
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keycode = xevent->xkey.keycode;
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state = xevent->xkey.state;
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for (li = binding_list; li != NULL; li = li->next)
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{
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Binding *binding = (Binding*) li->data;
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if (keycode == binding->key.keycode &&
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(state & USED_MODS) == binding->key.state)
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{
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GError* error = NULL;
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if (!g_spawn_command_line_async (binding->action, &error))
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{
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GtkWidget *dialog = gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_WARNING,
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GTK_BUTTONS_CLOSE,
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"Error while executing key action action\n"
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" (%s) (%s)",binding->action,
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binding->binding_str);
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gtk_signal_connect_object (GTK_OBJECT (dialog),
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"response",
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GTK_SIGNAL_FUNC (gtk_widget_destroy),
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GTK_OBJECT (dialog));
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gtk_signal_connect (GTK_OBJECT (dialog),
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"destroy",
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GTK_SIGNAL_FUNC (gtk_widget_destroyed),
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dialog);
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gtk_widget_show (dialog);
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}
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return GDK_FILTER_REMOVE;
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}
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}
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return GDK_FILTER_CONTINUE;
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}
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void
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gnome_settings_keybindings_init (GConfClient *client)
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{
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gnome_settings_daemon_register_callback (GCONF_BINDING_DIR, bindings_callback);
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gdk_window_add_filter (gdk_get_default_root_window (),
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keybindings_filter,
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NULL);
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}
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void
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gnome_settings_keybindings_load (GConfClient *client)
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{
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GSList *list, *li;
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list = gconf_client_all_dirs (client, GCONF_BINDING_DIR, NULL);
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for (li = list; li != NULL; li = li->next)
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{
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char *subdir = li->data;
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li->data = NULL;
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bindings_get_entry (subdir);
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}
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binding_register_keys ();
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}
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