[gtk] Fix label accessibility

[Matthias Clasen <matthiasc src gnome org>]

commit 6185cf95fb6ea26ba3857b10aca3a68df13ded1c
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 20 23:14:25 2020 -0400

    Fix label accessibility
    
    Emit accessible change signals after setting the
    new selection limits. This was broken in
    commit f6bedd0d5e4c8f7b, and showed up as broken
    accessibility tests.

 gtk/gtklabel.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index 6d2023ac60..dda9b0d558 100644
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -4536,6 +4536,8 @@ gtk_label_select_region_index (GtkLabel *self,
                                gint      end_index)
 {
   g_return_if_fail (GTK_IS_LABEL (self));
+  gboolean anchor_changed;
+  gboolean bound_changed;
 
   if (self->select_info && self->select_info->selectable)
     {
@@ -4601,14 +4603,17 @@ gtk_label_select_region_index (GtkLabel *self,
 
       g_object_freeze_notify (G_OBJECT (self));
 
-      if (self->select_info->selection_anchor != anchor_index)
-        _gtk_label_accessible_selection_bound_changed (self);
-      if (self->select_info->selection_end != end_index)
-        _gtk_label_accessible_cursor_position_changed (self);
+      anchor_changed = self->select_info->selection_anchor != anchor_index;
+      bound_changed = self->select_info->selection_end != end_index;
 
       self->select_info->selection_anchor = anchor_index;
       self->select_info->selection_end = end_index;
 
+      if (anchor_changed)
+        _gtk_label_accessible_selection_bound_changed (self);
+      if (bound_changed)
+        _gtk_label_accessible_cursor_position_changed (self);
+
       clipboard = gtk_widget_get_primary_clipboard (GTK_WIDGET (self));
 
       if (anchor_index != end_index)