GdkModifierType
gtk_widget_get_modifier_mask (GtkWidget *widget,
GdkModifierIntent intent)
{
GdkDisplay *display;
g_return_val_if_fail (GTK_IS_WIDGET (widget), 0);
display = gtk_widget_get_display (widget);
return gdk_keymap_get_modifier_mask (gdk_keymap_get_for_display (display),
intent);
}
/**
* _gtk_key_hash_lookup:
* @key_hash: a #GtkKeyHash
* @hardware_keycode: hardware keycode field from a #GdkEventKey
* @state: state field from a #GdkEventKey
* @mask: mask of modifiers to consider when matching against the
* modifiers in entries.
* @group: group field from a #GdkEventKey
*
* Looks up the best matching entry or entries in the hash table for
* a given event. The results are sorted so that entries with less
* modifiers come before entries with more modifiers.
*
* The matches returned by this function can be exact (i.e. keycode, level
* and group all match) or fuzzy (i.e. keycode and level match, but group
* does not). As long there are any exact matches, only exact matches
* are returned. If there are no exact matches, fuzzy matches will be
* returned, as long as they are not shadowing a possible exact match.
* This means that fuzzy matches won’t be considered if their keyval is
* present in the current group.
*
* Return value: A newly-allocated #GSList of matching entries.
* Free with g_slist_free() when no longer needed.
*/
GSList *
_gtk_key_hash_lookup (GtkKeyHash *key_hash,
guint16 hardware_keycode,
GdkModifierType state,
GdkModifierType mask,
gint group)
{
GHashTable *keycode_hash = key_hash_get_keycode_hash (key_hash);
GSList *keys = g_hash_table_lookup (keycode_hash, GUINT_TO_POINTER ((guint)hardware_keycode));
GSList *results = NULL;
GSList *l;
gboolean have_exact = FALSE;
guint keyval;
gint effective_group;
gint level;
GdkModifierType modifiers;
GdkModifierType consumed_modifiers;
GdkModifierType shift_group_mask;
gboolean group_mod_is_accel_mod = FALSE;
const GdkModifierType xmods = GDK_MOD2_MASK|GDK_MOD3_MASK|GDK_MOD4_MASK|GDK_MOD5_MASK;
const GdkModifierType vmods = GDK_SUPER_MASK|GDK_HYPER_MASK|GDK_META_MASK;
/* We don't want Caps_Lock to affect keybinding lookups.
*/
state &= ~GDK_LOCK_MASK;
_gtk_translate_keyboard_accel_state (key_hash->keymap,
hardware_keycode, state, mask, group,
&keyval,
&effective_group, &level, &consumed_modifiers);
/* if the group-toggling modifier is part of the default accel mod
* mask, and it is active, disable it for matching
*/
shift_group_mask = gdk_keymap_get_modifier_mask (key_hash->keymap,
GDK_MODIFIER_INTENT_SHIFT_GROUP);
if (mask & shift_group_mask)
group_mod_is_accel_mod = TRUE;
gdk_keymap_map_virtual_modifiers (key_hash->keymap, &mask);
gdk_keymap_add_virtual_modifiers (key_hash->keymap, &state);
GTK_NOTE (KEYBINDINGS,
g_message ("Looking up keycode = %u, modifiers = 0x%04x,\n"
" keyval = %u, group = %d, level = %d, consumed_modifiers = 0x%04x",
hardware_keycode, state, keyval, effective_group, level, consumed_modifiers));
if (keys)
{
GSList *tmp_list = keys;
while (tmp_list)
{
GtkKeyHashEntry *entry = tmp_list->data;
/* If the virtual Super, Hyper or Meta modifiers are present,
* they will also be mapped to some of the Mod2 - Mod5 modifiers,
* so we compare them twice, ignoring either set.
* We accept combinations involving virtual modifiers only if they
* are mapped to separate modifiers; i.e. if Super and Hyper are
* both mapped to Mod4, then pressing a key that is mapped to Mod4
* will not match a Super+Hyper entry.
*/
modifiers = entry->modifiers;
if (gdk_keymap_map_virtual_modifiers (key_hash->keymap, &modifiers) &&
((modifiers & ~consumed_modifiers & mask & ~vmods) == (state & ~consumed_modifiers & mask & ~vmods) ||
(modifiers & ~consumed_modifiers & mask & ~xmods) == (state & ~consumed_modifiers & mask & ~xmods)))
{
gint i;
if (keyval == entry->keyval && /* Exact match */
/* but also match for group if it is an accel mod, because
* otherwise we can get multiple exact matches, some being
* bogus */
(!group_mod_is_accel_mod ||
(state & shift_group_mask) == (entry->modifiers & shift_group_mask)))
{
GTK_NOTE (KEYBINDINGS,
g_message (" found exact match, keyval = %u, modifiers = 0x%04x",
entry->keyval, entry->modifiers));
if (!have_exact)
{
g_slist_free (results);
results = NULL;
}
have_exact = TRUE;
results = g_slist_prepend (results, entry);
}
if (!have_exact)
{
for (i = 0; i < entry->n_keys; i++)
{
if (entry->keys[i].keycode == hardware_keycode &&
entry->keys[i].level == level &&
/* Only match for group if it's an accel mod */
(!group_mod_is_accel_mod ||
entry->keys[i].group == effective_group))
{
GTK_NOTE (KEYBINDINGS,
g_message (" found group = %d, level = %d",
entry->keys[i].group, entry->keys[i].level));
results = g_slist_prepend (results, entry);
break;
}
}
}
}
tmp_list = tmp_list->next;
}
}
if (!have_exact && results)
{
/* If there are fuzzy matches, check that the current group doesn't also
* define these keyvals; if yes, discard results because a widget up in
* the stack may have an exact match and we don't want to 'steal' it.
*/
guint oldkeyval = 0;
GtkKeyHashEntry *keyhashentry;
results = sort_lookup_results_by_keyval (results);
for (l = results; l; l = l->next)
{
keyhashentry = l->data;
if (l == results || oldkeyval != keyhashentry->keyval)
{
oldkeyval = keyhashentry->keyval;
if (keyval_in_group (key_hash->keymap, oldkeyval, group))
{
g_slist_free (results);
return NULL;
}
}
}
}
results = sort_lookup_results (results);
for (l = results; l; l = l->next)
l->data = ((GtkKeyHashEntry *)l->data)->value;
return results;
}