[gtk/matthiasc/for-master] a11y: Treat PRESENTATION like NONE

[Matthias Clasen <matthiasc src gnome org>]

commit 48bb9200d913607cf0556c55c7da968bdb36024a
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Oct 21 14:40:34 2020 -0400

    a11y: Treat PRESENTATION like NONE
    
    This is what ARIA tells us to do. NONE is just another
    name for PRESENTATION.

 gtk/gtkaccessible.c | 3 ++-
 gtk/gtkenums.h      | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkaccessible.c b/gtk/gtkaccessible.c
index bef2ced14e..a98bd90ae2 100644
--- a/gtk/gtkaccessible.c
+++ b/gtk/gtkaccessible.c
@@ -746,7 +746,8 @@ gtk_accessible_should_present (GtkAccessible *self)
       !gtk_widget_get_visible (GTK_WIDGET (self)))
     return FALSE;
 
-  if (gtk_accessible_get_accessible_role (self) == GTK_ACCESSIBLE_ROLE_NONE)
+  if (gtk_accessible_get_accessible_role (self) == GTK_ACCESSIBLE_ROLE_NONE ||
+      gtk_accessible_get_accessible_role (self) == GTK_ACCESSIBLE_ROLE_PRESENTATION)
     return FALSE;
 
   return TRUE;
diff --git a/gtk/gtkenums.h b/gtk/gtkenums.h
index 36e90b71bb..28ed4fb2f1 100644
--- a/gtk/gtkenums.h
+++ b/gtk/gtkenums.h
@@ -1202,7 +1202,7 @@ typedef enum {
  * @GTK_ACCESSIBLE_ROLE_NONE: An element that is not represented to accessibility technologies.
  * @GTK_ACCESSIBLE_ROLE_NOTE: Unused
  * @GTK_ACCESSIBLE_ROLE_OPTION: Unused
- * @GTK_ACCESSIBLE_ROLE_PRESENTATION: Unused
+ * @GTK_ACCESSIBLE_ROLE_PRESENTATION: An element that is not represented to accessibility technologies.
  * @GTK_ACCESSIBLE_ROLE_PROGRESS_BAR: An element that displays the progress
  *    status for tasks that take a long time.
  * @GTK_ACCESSIBLE_ROLE_RADIO: A checkable input in a group of radio roles,