+ {
+ result = staff->extent (staff, Y_AXIS);
+
+ /* Due to rounding problems, bar lines extending to the outermost edges
+ of the staff lines appear wrongly in on-screen display
+ (and, to a lesser extent, in print) - they stick out a pixel.
+ The solution is to extend bar lines only to the middle
+ of the staff line - unless they have different colors,
+ when it would be undesirable.
+ */
+ SCM bar_line_color = me->get_property ("color");
+ SCM staff_color = staff->get_property ("color");
+ Real radius = Staff_symbol_referencer::staff_radius (me);
+ if (bar_line_color == staff_color && radius)
+ result *= (1 - 0.5 * (Staff_symbol_referencer::line_thickness (me) / radius));
+ }