[gtk: 15/60] a11y: Simplify the ATContext::state-change signal

[Matthias Clasen <matthiasc src gnome org>]

commit e5f4459e4bc265d1b5e6062cd90c9f278897ebd3
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Aug 25 16:34:04 2020 +0100

    a11y: Simplify the ATContext::state-change signal
    
    We cannot pass all the data we pass to the virtual function, because the
    types are private, but the class and the signal are public API.
    
    The signal is just a notification, so we can decouple the virtual
    function (which stays the same, for internal types that implement the
    ATContext API contract) from the signal.

 gtk/gtkatcontext.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)
---
diff --git a/gtk/gtkatcontext.c b/gtk/gtkatcontext.c
index e1e2edd599..6686e3f9a9 100644
--- a/gtk/gtkatcontext.c
+++ b/gtk/gtkatcontext.c
@@ -175,12 +175,6 @@ gtk_at_context_class_init (GtkATContextClass *klass)
   /**
    * GtkATContext::state-change:
    * @self: the #GtkATContext
-   * @changed_states: flags for the changed states
-   * @changed_properties: flags for the changed properties
-   * @changed_relations: flags for the changed relations
-   * @states: the new states
-   * @properties: the new properties
-   * @relations: the new relations
    *
    * Emitted when the attributes of the accessible for the
    * #GtkATContext instance change.
@@ -189,12 +183,10 @@ gtk_at_context_class_init (GtkATContextClass *klass)
     g_signal_new ("state-change",
                   G_TYPE_FROM_CLASS (gobject_class),
                   G_SIGNAL_RUN_FIRST,
-                  G_STRUCT_OFFSET (GtkATContextClass, state_change),
+                  0,
                   NULL, NULL,
                   NULL,
-                  G_TYPE_NONE, 6,
-                  G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT,
-                  G_TYPE_POINTER, G_TYPE_POINTER, G_TYPE_POINTER);
+                  G_TYPE_NONE, 0);
 
   g_object_class_install_properties (gobject_class, N_PROPS, obj_props);
 }
@@ -438,9 +430,10 @@ gtk_at_context_update (GtkATContext *self)
   GtkAccessibleRelationChange changed_relations =
     gtk_accessible_attribute_set_get_changed (self->relations);
 
-  g_signal_emit (self, obj_signals[STATE_CHANGE], 0,
-                 changed_states, changed_properties, changed_relations,
-                 self->states, self->properties, self->relations);
+  GTK_AT_CONTEXT_GET_CLASS (self)->state_change (self,
+                                                 changed_states, changed_properties, changed_relations,
+                                                 self->states, self->properties, self->relations);
+  g_signal_emit (self, obj_signals[STATE_CHANGE], 0);
 
   self->updated_properties = 0;
   self->updated_relations = 0;