[gtk/matthiasc/for-master] text: Support reverse selection

[Matthias Clasen <matthiasc src gnome org>]

commit 0d10982379ed4748137a5738b6eabc297201806f
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jun 26 22:22:47 2020 -0400

    text: Support reverse selection
    
    Take ordering of cursor_position and selection_bound
    into account when copying text to the clipboard, and
    ensure that both orders work the same.
    
    Fixes: #2898

 gtk/gtktext.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtktext.c b/gtk/gtktext.c
index 1ba21144c1..3dda4162cd 100644
--- a/gtk/gtktext.c
+++ b/gtk/gtktext.c
@@ -4025,7 +4025,11 @@ gtk_text_copy_clipboard (GtkText *self)
           return;
         }
 
-      str = gtk_text_get_display_text (self, priv->selection_bound, priv->current_pos);
+      if (priv->selection_bound < priv->current_pos)
+        str = gtk_text_get_display_text (self, priv->selection_bound, priv->current_pos);
+      else
+        str = gtk_text_get_display_text (self, priv->current_pos, priv->selection_bound);
+
       gdk_clipboard_set_text (gtk_widget_get_clipboard (GTK_WIDGET (self)), str);
       g_free (str);
     }