[gtk/a11y/atspi] searchentry: Implement GtkAccessible

[Matthias Clasen <matthiasc src gnome org>]

commit f796d02fea3ac7ec9435555133eb751d8df5df8f
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Oct 12 21:17:31 2020 -0400

    searchentry: Implement GtkAccessible
    
    This copies what was done for GtkEntry: get
    the focused state from the GtkText within.

 gtk/gtksearchentry.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
---
diff --git a/gtk/gtksearchentry.c b/gtk/gtksearchentry.c
index 4960c98941..78268113c8 100644
--- a/gtk/gtksearchentry.c
+++ b/gtk/gtksearchentry.c
@@ -29,6 +29,7 @@
 
 #include "gtksearchentryprivate.h"
 
+#include "gtkaccessibleprivate.h"
 #include "gtkeditable.h"
 #include "gtkboxlayout.h"
 #include "gtkgestureclick.h"
@@ -135,8 +136,11 @@ struct _GtkSearchEntryClass
 };
 
 static void gtk_search_entry_editable_init (GtkEditableInterface *iface);
+static void gtk_search_entry_accessible_init (GtkAccessibleInterface *iface);
 
 G_DEFINE_TYPE_WITH_CODE (GtkSearchEntry, gtk_search_entry, GTK_TYPE_WIDGET,
+                         G_IMPLEMENT_INTERFACE (GTK_TYPE_ACCESSIBLE,
+                                                gtk_search_entry_accessible_init)
                          G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE,
                                                 gtk_search_entry_editable_init))
 
@@ -438,6 +442,31 @@ gtk_search_entry_editable_init (GtkEditableInterface *iface)
   iface->get_delegate = gtk_search_entry_get_delegate;
 }
 
+static gboolean
+gtk_search_entry_accessible_get_platform_state (GtkAccessible              *self,
+                                                GtkAccessiblePlatformState  state)
+{
+  GtkSearchEntry *entry = GTK_SEARCH_ENTRY (self);
+
+  switch (state)
+    {
+    case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSABLE:
+      return gtk_widget_get_focusable (GTK_WIDGET (entry->entry));
+    case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED:
+      return gtk_widget_has_focus (GTK_WIDGET (entry->entry));
+    default:
+      g_assert_not_reached ();
+    }
+}
+
+static void
+gtk_search_entry_accessible_init (GtkAccessibleInterface *iface)
+{
+  GtkAccessibleInterface *parent_iface = g_type_interface_peek_parent (iface);
+  iface->get_at_context = parent_iface->get_at_context;
+  iface->get_platform_state = gtk_search_entry_accessible_get_platform_state;
+}
+
 static void
 gtk_search_entry_icon_release (GtkGestureClick *press,
                                int              n_press,