lily/separating-group-spanner.cc

   1 /*
   2   separating-group-spanner.cc --  implement Separating_group_spanner
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "separating-group-spanner.hh"
  11 #include "single-malt-grouping-item.hh"
  12 #include "paper-column.hh"
  13 #include "paper-def.hh"
  14 #include "dimensions.hh"
  15
  16 static Rod
  17 make_rod (Single_malt_grouping_item *l, Single_malt_grouping_item *r)
  18 {
  19   Rod rod;
  20   rod.item_l_drul_[LEFT] =l;
  21   rod.item_l_drul_[RIGHT]=r;
  22
  23   Interval li (l->my_width ());
  24   Interval ri (r->my_width ());
  25
  26   if (li.empty_b () || ri.empty_b ())
  27     rod.distance_f_ = 0;
  28   else
  29     rod.distance_f_ = li[RIGHT] - ri[LEFT];
  30
  31   return rod;
  32 }
  33
  34
  35 Array<Rod>
  36 Separating_group_spanner::get_rods () const
  37 {
  38   Array<Rod> a;
  39
  40   for (int i=0; i < spacing_unit_l_arr_.size () -1; i++)
  41     {
  42       Single_malt_grouping_item *l =spacing_unit_l_arr_[i];
  43       Single_malt_grouping_item *lb
  44         = dynamic_cast<Single_malt_grouping_item*>(l->find_prebroken_piece (RIGHT));
  45       Single_malt_grouping_item *r = spacing_unit_l_arr_[i+1];
  46       Single_malt_grouping_item *rb
  47         = dynamic_cast<Single_malt_grouping_item*>(r->find_prebroken_piece (LEFT));
  48
  49       a.push (make_rod(spacing_unit_l_arr_[i], spacing_unit_l_arr_[i+1]));
  50       if (lb)
  51         {
  52           Rod rod(make_rod (lb, r));
  53           rod.distance_f_ += padding_f_;
  54           a.push (rod);
  55         }
  56
  57       if (rb)
  58         {
  59           a.push (make_rod (l, rb));
  60         }
  61
  62       if (lb && rb)
  63         {
  64           Rod rod(make_rod (lb, rb));
  65           rod.distance_f_ += padding_f_;
  66           a.push (rod);
  67         }
  68     }
  69
  70   return a;
  71 }
  72
  73 void
  74 Separating_group_spanner::add_spacing_unit (Single_malt_grouping_item*i)
  75 {
  76   spacing_unit_l_arr_.push (i);
  77   add_dependency (i);
  78 }
  79
  80 void
  81 Separating_group_spanner::do_substitute_element_pointer (Score_element*o,
  82                                                          Score_element*n)
  83 {
  84   if (dynamic_cast<Single_malt_grouping_item *> (o))
  85     {
  86       Single_malt_grouping_item*ns = dynamic_cast<Single_malt_grouping_item *> (n);
  87       spacing_unit_l_arr_.substitute (dynamic_cast<Single_malt_grouping_item *> (o), ns);
  88     }
  89 }
  90
  91 Separating_group_spanner::Separating_group_spanner()
  92 {
  93   set_elt_property (break_helper_only_scm_sym, SCM_BOOL_T);
  94   padding_f_ =0.0;
  95 }