If a range is flippable, it will switch its direction if it is horizontal and its direction is GTK_TEXT_DIR_RTL. See gtk_widget_get_direction(). Since 2.18
TRUE to make the range flippable
See Implementation
If a range is flippable, it will switch its direction if it is horizontal and its direction is GTK_TEXT_DIR_RTL. See gtk_widget_get_direction(). Since 2.18