Merge branch 'ebassi/lazier-a11y' into 'master'

Lazier accessibility

See merge request GNOME/gtk!3102

gtk/a11y/gtkatspicache.c

@@ -58,6 +58,9 @@ struct _GtkAtSpiCache
 
   /* HashTable<GtkAtSpiContext, str> */
   GHashTable *contexts_to_path;
+
+  /* Re-entrancy guard */
+  gboolean in_get_items;
 };
 
 enum
@@ -250,10 +253,17 @@ handle_cache_method (GDBusConnection       *connection,
     {
       GVariantBuilder builder = G_VARIANT_BUILDER_INIT (G_VARIANT_TYPE ("(" GET_ITEMS_SIGNATURE ")"));
 
+      /* Prevent the emission os signals while collecting accessible
+       * objects as the result of walking the accessible tree
+       */
+      self->in_get_items = TRUE;
+
       g_variant_builder_open (&builder, G_VARIANT_TYPE (GET_ITEMS_SIGNATURE));
       collect_cached_objects (self, &builder);
       g_variant_builder_close (&builder);
 
+      self->in_get_items = FALSE;
+
       g_dbus_method_invocation_return_value (invocation, g_variant_builder_end (&builder));
     }
 }
@@ -371,7 +381,11 @@ gtk_at_spi_cache_add_context (GtkAtSpiCache   *self,
 
   GTK_NOTE (A11Y, g_message ("Adding context '%s' to cache", path_key));
 
-  emit_add_accessible (self, context);
+  /* GetItems is safe from re-entrancy, but we still don't want to
+   * emit an unnecessary signal while we're collecting ATContexts
+   */
+  if (!self->in_get_items)
+    emit_add_accessible (self, context);
 }
 
 void

gtk/gtkwidget.c

@@ -2374,7 +2374,7 @@ gtk_widget_init (GTypeInstance *instance, gpointer g_class)
   priv->at_context = gtk_accessible_get_at_context (GTK_ACCESSIBLE (widget));
 }
 
-static void
+void
 gtk_widget_realize_at_context (GtkWidget *self)
 {
   GtkWidgetPrivate *priv = gtk_widget_get_instance_private (self);
@@ -2383,10 +2383,6 @@ gtk_widget_realize_at_context (GtkWidget *self)
   if (priv->at_context == NULL || gtk_at_context_is_realized (priv->at_context))
     return;
 
-  /* Realize the root ATContext first */
-  if (!GTK_IS_ROOT (self))
-    gtk_widget_realize_at_context (GTK_WIDGET (priv->root));
-
   /* Reset the accessible role to its current value */
   if (role == GTK_ACCESSIBLE_ROLE_WIDGET)
     {
@@ -2400,6 +2396,18 @@ gtk_widget_realize_at_context (GtkWidget *self)
   gtk_at_context_realize (priv->at_context);
 }
 
+void
+gtk_widget_unrealize_at_context (GtkWidget *widget)
+{
+  GtkWidgetPrivate *priv = gtk_widget_get_instance_private (widget);
+
+  if (priv->at_context != NULL)
+    {
+      gtk_at_context_set_display (priv->at_context, gdk_display_get_default ());
+      gtk_at_context_unrealize (priv->at_context);
+    }
+}
+
 void
 gtk_widget_root (GtkWidget *widget)
 {
@@ -2428,8 +2436,6 @@ gtk_widget_root (GtkWidget *widget)
   if (priv->layout_manager)
     gtk_layout_manager_set_root (priv->layout_manager, priv->root);
 
-  gtk_widget_realize_at_context (widget);
-
   GTK_WIDGET_GET_CLASS (widget)->root (widget);
 
   if (!GTK_IS_ROOT (widget))
@@ -2454,12 +2460,6 @@ gtk_widget_unroot (GtkWidget *widget)
 
   GTK_WIDGET_GET_CLASS (widget)->unroot (widget);
 
-  if (priv->at_context != NULL)
-    {
-      gtk_at_context_set_display (priv->at_context, gdk_display_get_default ());
-      gtk_at_context_unrealize (priv->at_context);
-    }
-
   if (priv->context)
     gtk_style_context_set_display (priv->context, gdk_display_get_default ());
 

gtk/gtkwidgetprivate.h

@@ -373,6 +373,9 @@ gboolean gtk_widget_focus_self       (GtkWidget        *widget,
 void    gtk_widget_update_orientation   (GtkWidget      *widget,
                                          GtkOrientation  orientation);
 
+void    gtk_widget_realize_at_context   (GtkWidget *widget);
+void    gtk_widget_unrealize_at_context (GtkWidget *widget);
+
 /* inline getters */
 
 static inline GtkWidget *

gtk/gtkwindow.c

@@ -3806,6 +3806,8 @@ gtk_window_map (GtkWidget *widget)
 
   if (priv->application)
     gtk_application_handle_window_map (priv->application, window);
+
+  gtk_widget_realize_at_context (widget);
 }
 
 static void
@@ -3818,6 +3820,8 @@ gtk_window_unmap (GtkWidget *widget)
   GTK_WIDGET_CLASS (gtk_window_parent_class)->unmap (widget);
   gdk_surface_hide (priv->surface);
 
+  gtk_widget_unrealize_at_context (widget);
+
   if (priv->title_box != NULL)
     gtk_widget_unmap (priv->title_box);