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backends/native: Seal MetaKeymapNative xkb usage

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Don't let the vfuncs (meant to be called from the UI thread) deal with
xkb state itself. Instead store the current state in struct fields, which
is then fetched in vfuncs.

This makes the keymap able to be used from the UI thread, while being
maintained by the input thread. Same caveats apply than
clutter_seat_query_state(), you are asking for the most up-to-date state,
but it still may be changing under your feet.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403
This commit is contained in:
Carlos Garnacho 2020-08-12 11:16:39 +02:00
parent 6704e986a0
commit 4b88a769d2
3 changed files with 31 additions and 18 deletions
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45
src/backends/native/meta-keymap-native.c
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@ -36,6 +36,8 @@ struct _MetaKeymapNative
ClutterKeymap parent_instance;
struct xkb_keymap *keymap;
gboolean num_lock;
gboolean caps_lock;
};
G_DEFINE_TYPE (MetaKeymapNative, meta_keymap_native,
@ -54,31 +56,17 @@ meta_keymap_native_finalize (GObject *object)
static gboolean
meta_keymap_native_get_num_lock_state (ClutterKeymap *keymap)
{
struct xkb_state *xkb_state;
ClutterSeat *seat;
MetaKeymapNative *keymap_native = META_KEYMAP_NATIVE (keymap);
seat = clutter_backend_get_default_seat (clutter_get_default_backend ());
xkb_state = meta_seat_impl_get_xkb_state (META_SEAT_NATIVE (seat)->impl);
return xkb_state_mod_name_is_active (xkb_state,
XKB_MOD_NAME_NUM,
XKB_STATE_MODS_LATCHED |
XKB_STATE_MODS_LOCKED);
return keymap_native->num_lock;
}
static gboolean
meta_keymap_native_get_caps_lock_state (ClutterKeymap *keymap)
{
struct xkb_state *xkb_state;
ClutterSeat *seat;
MetaKeymapNative *keymap_native = META_KEYMAP_NATIVE (keymap);
seat = clutter_backend_get_default_seat (clutter_get_default_backend ());
xkb_state = meta_seat_impl_get_xkb_state (META_SEAT_NATIVE (seat)->impl);
return xkb_state_mod_name_is_active (xkb_state,
XKB_MOD_NAME_CAPS,
XKB_STATE_MODS_LATCHED |
XKB_STATE_MODS_LOCKED);
return keymap_native->caps_lock;
}
static PangoDirection
@ -132,3 +120,24 @@ meta_keymap_native_get_keyboard_map (MetaKeymapNative *keymap)
{
return keymap->keymap;
}
void
meta_keymap_native_update (MetaKeymapNative *keymap)
{
struct xkb_state *xkb_state;
ClutterSeat *seat;
seat = clutter_backend_get_default_seat (clutter_get_default_backend ());
xkb_state = meta_seat_impl_get_xkb_state (META_SEAT_NATIVE (seat)->impl);
keymap->num_lock =
xkb_state_mod_name_is_active (xkb_state,
XKB_MOD_NAME_NUM,
XKB_STATE_MODS_LATCHED |
XKB_STATE_MODS_LOCKED);
keymap->caps_lock =
xkb_state_mod_name_is_active (xkb_state,
XKB_MOD_NAME_CAPS,
XKB_STATE_MODS_LATCHED |
XKB_STATE_MODS_LOCKED);
}

1
src/backends/native/meta-keymap-native.h
View File

@ -32,5 +32,6 @@ G_DECLARE_FINAL_TYPE (MetaKeymapNative, meta_keymap_native,
void meta_keymap_native_set_keyboard_map (MetaKeymapNative *keymap,
struct xkb_keymap *xkb_keymap);
struct xkb_keymap * meta_keymap_native_get_keyboard_map (MetaKeymapNative *keymap);
void meta_keymap_native_update (MetaKeymapNative *keymap);
#endif /* META_KEYMAP_NATIVE_H */

3
src/backends/native/meta-seat-impl.c
View File

@ -2863,6 +2863,7 @@ meta_seat_impl_update_xkb_state (MetaSeatImpl *seat)
seat->scroll_lock_led = xkb_keymap_led_get_index (xkb_keymap, XKB_LED_NAME_SCROLL);
meta_seat_impl_sync_leds (seat);
meta_keymap_native_update (seat->keymap);
g_rw_lock_writer_unlock (&seat->state_lock);
}
@ -3034,6 +3035,7 @@ meta_seat_impl_set_keyboard_layout_index (MetaSeatImpl *seat,
locked_mods = xkb_state_serialize_mods (state, XKB_STATE_MODS_LOCKED);
xkb_state_update_mask (state, depressed_mods, latched_mods, locked_mods, 0, 0, idx);
meta_keymap_native_update (seat->keymap);
seat->layout_idx = idx;
@ -3095,6 +3097,7 @@ meta_seat_impl_set_keyboard_numlock (MetaSeatImpl *seat,
group_mods);
meta_seat_impl_sync_leds (seat);
meta_keymap_native_update (seat->keymap);
g_rw_lock_writer_unlock (&seat->state_lock);
}