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backend: Add API to get layout group

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Add API to get the layout group (layout index) currently active. In the
native backend this is done by fetching the state directly from the
evdev backend; on X11 this works by listening for XkbStateNotify
events, caching the layout group value.

https://bugzilla.gnome.org/show_bug.cgi?id=786408
This commit is contained in:
Jonas Ådahl
2017-08-17 17:01:50 +08:00
parent 5685449e15
commit 33f1706634
4 changed files with 58 additions and 1 deletions
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40
src/backends/x11/meta-backend-x11.c
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@@ -67,6 +67,7 @@ struct _MetaBackendX11Private
uint8_t xkb_error_base;
struct xkb_keymap *keymap;
xkb_layout_index_t keymap_layout_group;
MetaLogicalMonitor *cached_current_logical_monitor;
};
@@ -282,12 +283,18 @@ handle_host_xevent (MetaBackend *backend,
if (xkb_ev->any.device == META_VIRTUAL_CORE_KEYBOARD_ID)
{
int layout_group;
switch (xkb_ev->any.xkb_type)
{
case XkbNewKeyboardNotify:
case XkbMapNotify:
keymap_changed (backend);
break;
case XkbStateNotify:
layout_group = xkb_ev->state.locked_group;
priv->keymap_layout_group = layout_group;
break;
default:
break;
}
@@ -424,7 +431,6 @@ meta_backend_x11_post_init (MetaBackend *backend)
if (!has_xi)
meta_fatal ("X server doesn't have the XInput extension, version 2.2 or newer\n");
priv->xcb = XGetXCBConnection (priv->xdisplay);
if (!xkb_x11_setup_xkb_extension (priv->xcb,
XKB_X11_MIN_MAJOR_XKB_VERSION,
XKB_X11_MIN_MINOR_XKB_VERSION,
@@ -568,6 +574,15 @@ meta_backend_x11_get_keymap (MetaBackend *backend)
return priv->keymap;
}
static xkb_layout_index_t
meta_backend_x11_get_keymap_layout_group (MetaBackend *backend)
{
MetaBackendX11 *x11 = META_BACKEND_X11 (backend);
MetaBackendX11Private *priv = meta_backend_x11_get_instance_private (x11);
return priv->keymap_layout_group;
}
static void
meta_backend_x11_set_numlock (MetaBackend *backend,
gboolean numlock_state)
@@ -592,6 +607,25 @@ meta_backend_x11_get_xkb_event_base (MetaBackendX11 *x11)
return priv->xkb_event_base;
}
static void
init_xkb_state (MetaBackendX11 *x11)
{
MetaBackendX11Private *priv = meta_backend_x11_get_instance_private (x11);
struct xkb_keymap *keymap;
int32_t device_id;
struct xkb_state *state;
keymap = meta_backend_get_keymap (META_BACKEND (x11));
device_id = xkb_x11_get_core_keyboard_device_id (priv->xcb);
state = xkb_x11_state_new_from_device (keymap, priv->xcb, device_id);
priv->keymap_layout_group =
xkb_state_serialize_layout (state, XKB_STATE_LAYOUT_LOCKED);
xkb_state_unref (state);
}
static gboolean
meta_backend_x11_initable_init (GInitable *initable,
GCancellable *cancellable,
@@ -619,8 +653,11 @@ meta_backend_x11_initable_init (GInitable *initable,
}
priv->xdisplay = xdisplay;
priv->xcb = XGetXCBConnection (priv->xdisplay);
clutter_x11_set_display (xdisplay);
init_xkb_state (x11);
return initable_parent_iface->init (initable, cancellable, error);
}
@@ -645,6 +682,7 @@ meta_backend_x11_class_init (MetaBackendX11Class *klass)
backend_class->warp_pointer = meta_backend_x11_warp_pointer;
backend_class->get_current_logical_monitor = meta_backend_x11_get_current_logical_monitor;
backend_class->get_keymap = meta_backend_x11_get_keymap;
backend_class->get_keymap_layout_group = meta_backend_x11_get_keymap_layout_group;
backend_class->set_numlock = meta_backend_x11_set_numlock;
}