lily/tie-column.cc

   1 /*
   2   tie-column.cc -- implement Tie_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "tie-column.hh"
  10
  11 #include <cmath>
  12
  13 #include "output-def.hh"
  14 #include "skyline.hh"
  15 #include "warn.hh"
  16 #include "paper-column.hh"
  17 #include "spanner.hh"
  18 #include "pointer-group-interface.hh"
  19 #include "tie.hh"
  20 #include "directional-element-interface.hh"
  21 #include "tie-column-format.hh"
  22 #include "tie-formatting-problem.hh"
  23 #include "tie-configuration.hh"
  24
  25 using namespace std;
  26
  27 void
  28 Tie_column::add_tie (Grob *tc, Grob *tie)
  29 {
  30   Spanner *me = dynamic_cast<Spanner *> (tc);
  31
  32   if (tie->get_parent (Y_AXIS)
  33       && Tie_column::has_interface (tie->get_parent (Y_AXIS)))
  34     return;
  35
  36   if (!me->get_bound (LEFT)
  37       || (Paper_column::get_rank (me->get_bound (LEFT)->get_column ())
  38           > Paper_column::get_rank (dynamic_cast<Spanner*> (tie)->get_bound (LEFT)->get_column ())))
  39     {
  40         me->set_bound (LEFT, Tie::head (tie, LEFT));
  41         me->set_bound (RIGHT, Tie::head (tie, RIGHT));
  42     }
  43
  44   tie->set_parent (me, Y_AXIS);
  45   Pointer_group_interface::add_grob (me, ly_symbol2scm ("ties"), tie);
  46 }
  47
  48 /*
  49   Extend the spanner over its Tie constituents.
  50 */
  51 MAKE_SCHEME_CALLBACK (Tie_column, before_line_breaking, 1);
  52 SCM
  53 Tie_column::before_line_breaking (SCM smob)
  54 {
  55   Spanner *me = dynamic_cast<Spanner *> (unsmob_grob (smob));
  56   for (SCM s = me->get_property ("ties"); scm_is_pair (s); s = scm_cdr (s))
  57     {
  58       Spanner *tie = dynamic_cast<Spanner *> (unsmob_grob (scm_car (s)));
  59       Direction dir = LEFT;
  60       do
  61         {
  62           if (dir * tie->get_bound (dir)->get_column ()->get_rank ()
  63               > dir * me->get_bound (dir)->get_column ()->get_rank ())
  64             me->set_bound (dir, Tie::head (tie, dir));
  65         }
  66       while (flip (&dir) != LEFT);
  67     }
  68
  69   return SCM_UNSPECIFIED;
  70 }
  71
  72 MAKE_SCHEME_CALLBACK (Tie_column, calc_positioning_done, 1)
  73 SCM
  74 Tie_column::calc_positioning_done (SCM smob)
  75 {
  76   Grob *me = unsmob_grob (smob);
  77   extract_grob_set (me, "ties", ro_ties);
  78   vector<Grob*> ties (ro_ties);
  79   if (!ties.size ())
  80     return SCM_BOOL_T;
  81
  82
  83   me->set_property ("positioning-done", SCM_BOOL_T);
  84
  85   vector_sort (ties, Tie::less);
  86
  87   Tie_formatting_problem problem;
  88   problem.from_ties (ties);
  89
  90   SCM manual_configs = me->get_property ("tie-configuration");
  91   problem.set_manual_tie_configuration (manual_configs);
  92
  93
  94   Ties_configuration base = problem.generate_optimal_configuration ();
  95
  96   for (vsize i = 0; i < base.size (); i++)
  97     {
  98       SCM cp = Tie::get_control_points (ties[i], problem.common_x_refpoint (),
  99                                         base[i],
 100                                         problem.details_);
 101
 102       ties[i]->set_property ("control-points", cp);
 103       set_grob_direction (ties[i],
 104                           base[i].dir_);
 105
 106       problem.set_debug_scoring (base);
 107     }
 108   return SCM_BOOL_T;
 109 }
 110
 111
 112
 113 ADD_INTERFACE (Tie_column,
 114                "Object that sets directions of multiple ties in a tied chord.",
 115
 116                /* properties */
 117                "positioning-done "
 118                "tie-configuration "
 119                );
 120