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keybindings: Keep keybindings in an hash table instead of an array
This allows us to look for a match with an O(1) search instead of O(n) which is nice, particularly when running as a wayland compositor in which case we have to do this search for every key press event (as opposed to only when our passive grab triggers in the X compositor case). We actually need two hash tables. On one we keep all the keybindings themselves which allows us to add external grabs without constantly re-allocating the array we were using previously. The other hash table is an index of the keybindings in the first table by their keycodes and mask which is how we actually match the key press events. This second table thus needs to be rebuilt when the keymap changes since keycodes have to be resolved then but since we're only keeping pointers to the first table it's a fast operation. https://bugzilla.gnome.org/show_bug.cgi?id=725588
This commit is contained in:
Rui Matos
parent
d417c615d5
commit
46af3ef9f6
@ -232,8 +232,8 @@ struct _MetaDisplay
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int grab_resize_timeout_id;
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/* Keybindings stuff */
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MetaKeyBinding *key_bindings;
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int n_key_bindings;
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GHashTable *key_bindings;
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GHashTable *key_bindings_index;
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int min_keycode;
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int max_keycode;
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KeySym *keymap;
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@ -157,6 +157,22 @@ meta_key_grab_free (MetaKeyGrab *grab)
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g_free (grab);
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}
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static guint32
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key_binding_key (guint32 keycode,
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guint32 mask)
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{
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/* On X, keycodes are only 8 bits while libxkbcommon supports 32 bit
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keycodes, but since we're using the same XKB keymaps that X uses,
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we won't find keycodes bigger than 8 bits in practice. The bits
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that mutter cares about in the modifier mask are also all in the
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lower 8 bits both on X and clutter key events. This means that we
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can use a 32 bit integer to safely concatenate both keycode and
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mask and thus making it easy to use them as an index in a
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GHashTable. */
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guint32 key = keycode & 0xffff;
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return (key << 16) | (mask & 0xffff);
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}
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static void
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reload_keymap (MetaDisplay *display)
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@ -455,6 +471,18 @@ keysym_to_keycode (MetaDisplay *display,
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return XKeysymToKeycode (display->xdisplay, keysym);
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}
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static void
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binding_reload_keycode_foreach (gpointer key,
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gpointer value,
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gpointer data)
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{
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MetaDisplay *display = data;
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MetaKeyBinding *binding = value;
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if (binding->keysym)
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binding->keycode = keysym_to_keycode (display, binding->keysym);
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}
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static void
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reload_keycodes (MetaDisplay *display)
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{
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@ -473,22 +501,25 @@ reload_keycodes (MetaDisplay *display)
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reload_iso_next_group_combos (display);
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if (display->key_bindings)
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{
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int i;
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g_hash_table_foreach (display->key_bindings, binding_reload_keycode_foreach, display);
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}
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i = 0;
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while (i < display->n_key_bindings)
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{
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if (display->key_bindings[i].keysym != 0)
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{
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display->key_bindings[i].keycode =
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keysym_to_keycode (display, display->key_bindings[i].keysym);
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}
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static void
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binding_reload_modifiers_foreach (gpointer key,
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gpointer value,
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gpointer data)
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{
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MetaDisplay *display = data;
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MetaKeyBinding *binding = value;
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++i;
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}
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}
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meta_display_devirtualize_modifiers (display,
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binding->modifiers,
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&binding->mask);
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meta_topic (META_DEBUG_KEYBINDINGS,
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" Devirtualized mods 0x%x -> 0x%x (%s)\n",
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binding->modifiers,
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binding->mask,
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binding->name);
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}
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static void
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@ -497,80 +528,48 @@ reload_modifiers (MetaDisplay *display)
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meta_topic (META_DEBUG_KEYBINDINGS,
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"Reloading keycodes for binding tables\n");
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if (display->key_bindings)
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{
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int i;
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i = 0;
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while (i < display->n_key_bindings)
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{
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meta_display_devirtualize_modifiers (display,
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display->key_bindings[i].modifiers,
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&display->key_bindings[i].mask);
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meta_topic (META_DEBUG_KEYBINDINGS,
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" Devirtualized mods 0x%x -> 0x%x (%s)\n",
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display->key_bindings[i].modifiers,
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display->key_bindings[i].mask,
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display->key_bindings[i].name);
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++i;
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}
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}
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g_hash_table_foreach (display->key_bindings, binding_reload_modifiers_foreach, display);
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}
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static int
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count_bindings (GList *prefs)
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static void
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index_binding (MetaDisplay *display,
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MetaKeyBinding *binding)
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{
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GList *p;
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int count;
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guint32 index_key;
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count = 0;
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p = prefs;
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while (p)
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{
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MetaKeyPref *pref = (MetaKeyPref*)p->data;
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GSList *tmp = pref->combos;
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index_key = key_binding_key (binding->keycode, binding->mask);
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g_hash_table_replace (display->key_bindings_index,
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GINT_TO_POINTER (index_key), binding);
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}
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while (tmp)
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{
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MetaKeyCombo *combo = tmp->data;
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static void
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binding_index_foreach (gpointer key,
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gpointer value,
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gpointer data)
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{
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MetaDisplay *display = data;
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MetaKeyBinding *binding = value;
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if (combo && (combo->keysym != None || combo->keycode != 0))
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{
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count += 1;
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index_binding (display, binding);
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}
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if (pref->add_shift &&
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(combo->modifiers & META_VIRTUAL_SHIFT_MASK) == 0)
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count += 1;
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}
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tmp = tmp->next;
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}
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p = p->next;
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}
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return count;
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static void
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rebuild_binding_index (MetaDisplay *display)
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{
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g_hash_table_remove_all (display->key_bindings_index);
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g_hash_table_foreach (display->key_bindings, binding_index_foreach, display);
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}
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static void
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rebuild_binding_table (MetaDisplay *display,
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MetaKeyBinding **bindings_p,
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int *n_bindings_p,
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GList *prefs,
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GList *grabs)
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{
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MetaKeyBinding *b;
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GList *p, *g;
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int n_bindings;
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int i;
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n_bindings = count_bindings (prefs) + g_list_length (grabs);
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g_free (*bindings_p);
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*bindings_p = g_new0 (MetaKeyBinding, n_bindings);
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g_hash_table_remove_all (display->key_bindings);
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i = 0;
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p = prefs;
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while (p)
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{
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@ -585,15 +584,17 @@ rebuild_binding_table (MetaDisplay *display,
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{
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MetaKeyHandler *handler = HANDLER (pref->name);
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(*bindings_p)[i].name = pref->name;
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(*bindings_p)[i].handler = handler;
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(*bindings_p)[i].flags = handler->flags;
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(*bindings_p)[i].keysym = combo->keysym;
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(*bindings_p)[i].keycode = combo->keycode;
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(*bindings_p)[i].modifiers = combo->modifiers;
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(*bindings_p)[i].mask = 0;
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b = g_malloc0 (sizeof (MetaKeyBinding));
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++i;
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b->name = pref->name;
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b->handler = handler;
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b->flags = handler->flags;
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b->keysym = combo->keysym;
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b->keycode = combo->keycode;
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b->modifiers = combo->modifiers;
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b->mask = 0;
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g_hash_table_add (display->key_bindings, b);
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if (pref->add_shift &&
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(combo->modifiers & META_VIRTUAL_SHIFT_MASK) == 0)
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@ -602,16 +603,17 @@ rebuild_binding_table (MetaDisplay *display,
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"Binding %s also needs Shift grabbed\n",
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pref->name);
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(*bindings_p)[i].name = pref->name;
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(*bindings_p)[i].handler = handler;
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(*bindings_p)[i].flags = handler->flags;
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(*bindings_p)[i].keysym = combo->keysym;
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(*bindings_p)[i].keycode = combo->keycode;
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(*bindings_p)[i].modifiers = combo->modifiers |
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META_VIRTUAL_SHIFT_MASK;
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(*bindings_p)[i].mask = 0;
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b = g_malloc0 (sizeof (MetaKeyBinding));
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++i;
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b->name = pref->name;
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b->handler = handler;
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b->flags = handler->flags;
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b->keysym = combo->keysym;
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b->keycode = combo->keycode;
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b->modifiers = combo->modifiers | META_VIRTUAL_SHIFT_MASK;
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b->mask = 0;
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g_hash_table_add (display->key_bindings, b);
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}
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}
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@ -629,27 +631,25 @@ rebuild_binding_table (MetaDisplay *display,
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{
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MetaKeyHandler *handler = HANDLER ("external-grab");
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(*bindings_p)[i].name = grab->name;
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(*bindings_p)[i].handler = handler;
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(*bindings_p)[i].flags = handler->flags;
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(*bindings_p)[i].keysym = grab->combo->keysym;
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(*bindings_p)[i].keycode = grab->combo->keycode;
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(*bindings_p)[i].modifiers = grab->combo->modifiers;
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(*bindings_p)[i].mask = 0;
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b = g_malloc0 (sizeof (MetaKeyBinding));
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++i;
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b->name = grab->name;
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b->handler = handler;
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b->flags = handler->flags;
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b->keysym = grab->combo->keysym;
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b->keycode = grab->combo->keycode;
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b->modifiers = grab->combo->modifiers;
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b->mask = 0;
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g_hash_table_add (display->key_bindings, b);
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}
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g = g->next;
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}
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g_assert (i == n_bindings);
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*n_bindings_p = i;
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meta_topic (META_DEBUG_KEYBINDINGS,
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" %d bindings in table\n",
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*n_bindings_p);
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g_hash_table_size (display->key_bindings));
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}
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static void
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@ -662,10 +662,7 @@ rebuild_key_binding_table (MetaDisplay *display)
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prefs = meta_prefs_get_keybindings ();
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grabs = g_hash_table_get_values (external_grabs);
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rebuild_binding_table (display,
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&display->key_bindings,
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&display->n_key_bindings,
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prefs, grabs);
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rebuild_binding_table (display, prefs, grabs);
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g_list_free (prefs);
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g_list_free (grabs);
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}
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@ -747,26 +744,15 @@ grab_key_bindings (MetaDisplay *display)
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static MetaKeyBinding *
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display_get_keybinding (MetaDisplay *display,
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unsigned int keycode,
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unsigned long mask)
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guint32 keycode,
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guint32 mask)
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{
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int i;
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guint32 key;
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mask = mask & 0xff & ~display->ignored_modifier_mask;
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key = key_binding_key (keycode, mask);
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i = display->n_key_bindings - 1;
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while (i >= 0)
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{
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if (display->key_bindings[i].keycode == keycode &&
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display->key_bindings[i].mask == mask)
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{
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return &display->key_bindings[i];
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}
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--i;
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}
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return NULL;
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return g_hash_table_lookup (display->key_bindings_index, GINT_TO_POINTER (key));
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}
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static guint
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@ -985,6 +971,8 @@ meta_display_process_mapping_event (MetaDisplay *display,
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reload_modifiers (display);
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rebuild_binding_index (display);
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grab_key_bindings (display);
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}
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}
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@ -1005,6 +993,7 @@ bindings_changed_callback (MetaPreference pref,
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rebuild_special_bindings (display);
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reload_keycodes (display);
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reload_modifiers (display);
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rebuild_binding_index (display);
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grab_key_bindings (display);
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break;
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default:
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@ -1025,7 +1014,9 @@ meta_display_shutdown_keys (MetaDisplay *display)
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if (display->modmap)
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XFreeModifiermap (display->modmap);
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g_free (display->key_bindings);
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g_hash_table_destroy (display->key_bindings_index);
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g_hash_table_destroy (display->key_bindings);
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}
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static const char*
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@ -1123,36 +1114,48 @@ meta_change_keygrab (MetaDisplay *display,
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meta_error_trap_pop (display);
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}
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typedef struct
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{
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MetaDisplay *display;
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Window xwindow;
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gboolean binding_per_window;
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gboolean grab;
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} ChangeKeygrabData;
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static void
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change_binding_keygrabs (MetaKeyBinding *bindings,
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int n_bindings,
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MetaDisplay *display,
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change_keygrab_foreach (gpointer key,
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gpointer value,
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gpointer user_data)
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{
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ChangeKeygrabData *data = user_data;
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MetaKeyBinding *binding = value;
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if (!!data->binding_per_window ==
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!!(binding->flags & META_KEY_BINDING_PER_WINDOW) &&
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binding->keycode != 0)
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{
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meta_change_keygrab (data->display, data->xwindow, data->grab,
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binding->keysym,
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binding->keycode,
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binding->mask);
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}
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}
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static void
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change_binding_keygrabs (MetaDisplay *display,
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Window xwindow,
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gboolean binding_per_window,
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gboolean grab)
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{
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int i;
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ChangeKeygrabData data;
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g_assert (n_bindings == 0 || bindings != NULL);
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data.display = display;
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data.xwindow = xwindow;
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data.binding_per_window = binding_per_window;
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data.grab = grab;
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meta_error_trap_push (display);
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i = 0;
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while (i < n_bindings)
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{
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if (!!binding_per_window ==
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!!(bindings[i].flags & META_KEY_BINDING_PER_WINDOW) &&
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bindings[i].keycode != 0)
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{
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meta_change_keygrab (display, xwindow, grab,
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bindings[i].keysym,
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bindings[i].keycode,
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bindings[i].mask);
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}
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++i;
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}
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g_hash_table_foreach (display->key_bindings, change_keygrab_foreach, &data);
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meta_error_trap_pop (display);
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}
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@ -1184,10 +1187,7 @@ meta_screen_change_keygrabs (MetaScreen *screen,
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}
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}
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change_binding_keygrabs (screen->display->key_bindings,
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screen->display->n_key_bindings,
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screen->display, screen->xroot,
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FALSE, grab);
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change_binding_keygrabs (screen->display, screen->xroot, FALSE, grab);
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}
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void
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@ -1220,10 +1220,7 @@ meta_window_change_keygrabs (MetaWindow *window,
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Window xwindow,
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gboolean grab)
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{
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change_binding_keygrabs (window->display->key_bindings,
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window->display->n_key_bindings,
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window->display, xwindow,
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TRUE, grab);
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change_binding_keygrabs (window->display, xwindow, TRUE, grab);
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}
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void
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@ -1294,6 +1291,7 @@ guint
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meta_display_grab_accelerator (MetaDisplay *display,
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const char *accelerator)
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{
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MetaKeyBinding *binding;
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MetaKeyGrab *grab;
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guint keysym = 0;
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guint keycode = 0;
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@ -1335,12 +1333,7 @@ meta_display_grab_accelerator (MetaDisplay *display,
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g_hash_table_insert (external_grabs, grab->name, grab);
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display->n_key_bindings++;
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display->key_bindings = g_renew (MetaKeyBinding,
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display->key_bindings,
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display->n_key_bindings);
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MetaKeyBinding *binding = &display->key_bindings[display->n_key_bindings - 1];
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binding = g_malloc0 (sizeof (MetaKeyBinding));
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binding->name = grab->name;
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binding->handler = HANDLER ("external-grab");
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binding->keysym = grab->combo->keysym;
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@ -1348,6 +1341,9 @@ meta_display_grab_accelerator (MetaDisplay *display,
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binding->modifiers = grab->combo->modifiers;
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binding->mask = mask;
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g_hash_table_add (display->key_bindings, binding);
|
||||
index_binding (display, binding);
|
||||
|
||||
return grab->action;
|
||||
}
|
||||
|
||||
@ -1371,7 +1367,9 @@ meta_display_ungrab_accelerator (MetaDisplay *display,
|
||||
grab->combo->modifiers);
|
||||
if (binding)
|
||||
{
|
||||
guint32 index_key;
|
||||
GSList *l;
|
||||
|
||||
for (l = display->screens; l; l = l->next)
|
||||
{
|
||||
MetaScreen *screen = l->data;
|
||||
@ -1381,10 +1379,10 @@ meta_display_ungrab_accelerator (MetaDisplay *display,
|
||||
binding->mask);
|
||||
}
|
||||
|
||||
binding->keysym = 0;
|
||||
binding->keycode = 0;
|
||||
binding->modifiers = 0;
|
||||
binding->mask = 0;
|
||||
index_key = key_binding_key (binding->keycode, binding->mask);
|
||||
g_hash_table_remove (display->key_bindings_index, GINT_TO_POINTER (index_key));
|
||||
|
||||
g_hash_table_remove (display->key_bindings, binding);
|
||||
}
|
||||
|
||||
g_hash_table_remove (external_grabs, key);
|
||||
@ -1663,9 +1661,7 @@ invoke_handler (MetaDisplay *display,
|
||||
}
|
||||
|
||||
static gboolean
|
||||
process_event (MetaKeyBinding *bindings,
|
||||
int n_bindings,
|
||||
MetaDisplay *display,
|
||||
process_event (MetaDisplay *display,
|
||||
MetaScreen *screen,
|
||||
MetaWindow *window,
|
||||
ClutterKeyEvent *event)
|
||||
@ -1676,10 +1672,6 @@ process_event (MetaKeyBinding *bindings,
|
||||
if (event->type == CLUTTER_KEY_RELEASE)
|
||||
return FALSE;
|
||||
|
||||
/*
|
||||
* TODO: This would be better done with a hash table;
|
||||
* it doesn't suit to use O(n) for such a common operation.
|
||||
*/
|
||||
binding = display_get_keybinding (display,
|
||||
event->hardware_keycode,
|
||||
event->modifier_state);
|
||||
@ -1735,9 +1727,7 @@ process_overlay_key (MetaDisplay *display,
|
||||
* the event. Other clients with global grabs will be out of
|
||||
* luck.
|
||||
*/
|
||||
if (process_event (display->key_bindings,
|
||||
display->n_key_bindings,
|
||||
display, screen, window, event))
|
||||
if (process_event (display, screen, window, event))
|
||||
{
|
||||
/* As normally, after we've handled a global key
|
||||
* binding, we unfreeze the keyboard but keep the grab
|
||||
@ -1953,9 +1943,7 @@ meta_display_process_key_event (MetaDisplay *display,
|
||||
}
|
||||
|
||||
/* Do the normal keybindings */
|
||||
return process_event (display->key_bindings,
|
||||
display->n_key_bindings,
|
||||
display, screen, window, event);
|
||||
return process_event (display, screen, window, event);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
@ -3944,8 +3932,9 @@ meta_display_init_keys (MetaDisplay *display)
|
||||
display->hyper_mask = 0;
|
||||
display->super_mask = 0;
|
||||
display->meta_mask = 0;
|
||||
display->key_bindings = NULL;
|
||||
display->n_key_bindings = 0;
|
||||
|
||||
display->key_bindings = g_hash_table_new_full (NULL, NULL, NULL, g_free);
|
||||
display->key_bindings_index = g_hash_table_new (NULL, NULL);
|
||||
|
||||
XDisplayKeycodes (display->xdisplay,
|
||||
&display->min_keycode,
|
||||
@ -3992,6 +3981,7 @@ meta_display_init_keys (MetaDisplay *display)
|
||||
|
||||
reload_keycodes (display);
|
||||
reload_modifiers (display);
|
||||
rebuild_binding_index (display);
|
||||
|
||||
/* Keys are actually grabbed in meta_screen_grab_keys() */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user