lily/spanner.cc

   1 /*
   2   spanner.cc -- implement Spanner
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "debug.hh"
  10 #include "spanner.hh"
  11 #include "p-col.hh"
  12 #include "p-score.hh"
  13 #include "outputter.hh"
  14
  15 IMPLEMENT_IS_TYPE_B1(Spanner,Score_elem);
  16
  17 void
  18 Spanner::do_print() const
  19 {
  20 #ifndef NPRINT
  21   DOUT << "Between col ";
  22   if (broken_into_l_arr_.size())
  23     DOUT << "with broken pieces\n";
  24 #endif
  25 }
  26
  27 void
  28 Spanner::break_into_pieces ()
  29 {
  30   if (broken_into_l_arr_.size())
  31     return;
  32
  33   Item * left = spanned_drul_[LEFT];
  34   Item * right = spanned_drul_[RIGHT];
  35
  36
  37   Link_array<Item> break_cols = pscore_l_->broken_col_range (left,right);
  38   Link_array<Spanner> broken_into_l_arr;
  39
  40   break_cols.insert (left,0);
  41   break_cols.push (right);
  42
  43   for (int i=1; i < break_cols.size(); i++)
  44     {
  45       Spanner* span_p = clone()->spanner ();
  46       left = break_cols[i-1];
  47       right = break_cols[i];
  48       if (!right->line_l())
  49         right = right->find_prebroken_piece(-1);
  50       if (!left->line_l())
  51         left = left->find_prebroken_piece(1);
  52
  53             assert (left&&right && left->line_l() == right->line_l());
  54
  55       span_p->set_bounds(LEFT,left);
  56       span_p->set_bounds(RIGHT,right);
  57
  58       pscore_l_->typeset_broken_spanner (span_p);
  59       broken_into_l_arr.push (span_p);
  60     }
  61
  62   broken_into_l_arr_ = broken_into_l_arr;
  63 }
  64
  65 void
  66 Spanner::set_my_columns()
  67 {
  68   Direction i = (Direction)1;
  69   do
  70     {
  71       if (!spanned_drul_[i]->line_l())
  72         set_bounds(i,spanned_drul_[i]->find_prebroken_piece(-i));
  73     }
  74   while ((i*=-1) != 1);
  75 }
  76
  77
  78 void
  79 Spanner::set_bounds(Direction d, Item*i)
  80 {
  81   if (spanned_drul_[d])
  82     spanned_drul_[d]->attached_span_l_arr_.substitute(this,0);
  83
  84   spanned_drul_[d] =i;
  85   if (i)
  86     i->attached_span_l_arr_.push(this);
  87
  88   assert (!spanned_drul_[d] ||
  89           spanned_drul_[Direction(-d)] != spanned_drul_[d]);
  90
  91 }
  92
  93 void
  94 Spanner::do_break_processing()
  95 {
  96   if (!line_l())
  97     {
  98       break_into_pieces ();
  99       for (int i=0; i < broken_into_l_arr_.size(); i++)
 100         broken_into_l_arr_[i]->handle_broken_dependencies();
 101     }
 102   else
 103     {
 104       handle_broken_dependencies();
 105     }
 106 }
 107
 108
 109 Spanner::Spanner()
 110 {
 111   spanned_drul_[LEFT]=0;
 112   spanned_drul_[RIGHT]=0;
 113 }
 114
 115 void
 116 Spanner::do_brew_molecule ()
 117 {
 118   if (transparent_b_)
 119     return ;
 120   Molecule *output= brew_molecule_p ();
 121   Offset left_off (spanned_drul_[LEFT]->absolute_coordinate(X_AXIS), 0);
 122   Offset o = absolute_offset() + left_off;
 123   pscore_l_->outputter_l_->output_molecule (output, o);
 124 }
 125
 126 Interval
 127 Spanner::do_width() const
 128 {
 129   Real l = spanned_drul_[LEFT]->absolute_coordinate (X_AXIS);
 130   Real r = spanned_drul_[RIGHT]->absolute_coordinate (X_AXIS);
 131   assert (r>=l);
 132
 133   return Interval (0, r-l);
 134 }
 135
 136 Line_of_score *
 137 Spanner::line_l() const
 138 {
 139   if (!spanned_drul_[LEFT] || !spanned_drul_[RIGHT])
 140     return 0;
 141   if (spanned_drul_[LEFT]->line_l() != spanned_drul_[RIGHT]->line_l())
 142     return 0;
 143   return spanned_drul_[LEFT]->line_l();
 144 }
 145
 146
 147 Spanner*
 148 Spanner::find_broken_piece (Line_of_score*l) const
 149 {
 150   for (int i=0; i < broken_into_l_arr_.size(); i++)
 151     if (broken_into_l_arr_[i]->line_l() == l)
 152       return broken_into_l_arr_[i];
 153   return 0;
 154
 155 }
 156
 157 bool
 158 Spanner::broken_b() const
 159 {
 160   return broken_into_l_arr_.size();
 161 }
 162
 163 void
 164 Spanner::do_unlink()
 165 {
 166   set_bounds (LEFT, 0);
 167   set_bounds (RIGHT, 0);
 168 }
 169
 170 void
 171 Spanner::do_junk_links()
 172 {
 173   spanned_drul_[LEFT] = spanned_drul_[RIGHT] =0;
 174 }