lily/note-column.cc

   1 /*
   2   note-column.cc -- implement Note_column
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "dot-column.hh"
   9 #include "note-column.hh"
  10 #include "beam.hh"
  11 #include "note-head.hh"
  12 #include "stem.hh"
  13 #include "rest.hh"
  14 #include "debug.hh"
  15 #include "paper-def.hh"
  16
  17 bool
  18 Note_column::rest_b () const
  19 {
  20   return rest_l_arr_.size ();
  21 }
  22
  23 int
  24 Note_column::shift_compare (Note_column *const &p1, Note_column*const&p2)
  25 {
  26   SCM s1 = p1->get_elt_property (horizontal_shift_scm_sym);
  27   SCM s2 = p2->get_elt_property (horizontal_shift_scm_sym);
  28
  29   int h1 = (s1 == SCM_BOOL_F) ? 0 : gh_scm2int (SCM_CDR(s1));
  30   int h2 = (s2 == SCM_BOOL_F) ? 0 : gh_scm2int (SCM_CDR(s2));
  31   return h1 - h2;
  32 }
  33
  34 Note_column::Note_column()
  35 {
  36   set_axes (X_AXIS,X_AXIS);
  37   stem_l_ = 0;
  38 }
  39
  40 void
  41 Note_column::sort()
  42 {
  43   head_l_arr_.sort (Note_head::compare);
  44 }
  45
  46 Slice
  47 Note_column::head_positions_interval() const
  48 {
  49   Slice  iv;
  50
  51   iv.set_empty ();
  52   for (int i=0; i <head_l_arr_.size ();i ++)
  53     {
  54       int j = head_l_arr_[i]->position_i_;
  55       iv.unite (Slice (j,j));
  56     }
  57   return iv;
  58 }
  59
  60 Direction
  61 Note_column::dir () const
  62 {
  63   if (stem_l_)
  64     return stem_l_->dir_;
  65   else if (head_l_arr_.size ())
  66     return sign (head_positions_interval().center ());
  67
  68   programming_error ("Note column without heads and stem!");
  69   return CENTER;
  70 }
  71
  72
  73 void
  74 Note_column::set_stem (Stem * stem_l)
  75 {
  76   stem_l_ = stem_l;
  77   add_dependency (stem_l);
  78   add_element (stem_l);
  79 }
  80
  81
  82 void
  83 Note_column::do_substitute_element_pointer (Score_element*o, Score_element*n)
  84 {
  85   if (stem_l_ == o)
  86     {
  87       stem_l_ = n ? dynamic_cast<Stem *> (n):0;
  88     }
  89   if (dynamic_cast<Note_head *> (o))
  90     {
  91       head_l_arr_.substitute (dynamic_cast<Note_head *> (o),
  92                               (n)? dynamic_cast<Note_head *> (n) : 0);
  93     }
  94
  95   if (dynamic_cast<Rest *> (o))
  96     {
  97       rest_l_arr_.substitute (dynamic_cast<Rest *> (o),
  98                               (n)? dynamic_cast<Rest *> (n) : 0);
  99     }
 100 }
 101
 102 void
 103 Note_column::add_head (Rhythmic_head *h)
 104 {
 105   if (Rest*r=dynamic_cast<Rest *> (h))
 106     {
 107       rest_l_arr_.push (r);
 108     }
 109   if (Note_head *nh=dynamic_cast<Note_head *> (h))
 110     {
 111       head_l_arr_.push (nh);
 112     }
 113   add_element (h);
 114 }
 115
 116 /**
 117   translate the rest symbols vertically by amount DY_I.
 118  */
 119 void
 120 Note_column::translate_rests (int dy_i)
 121 {
 122   invalidate_cache (Y_AXIS);
 123   for (int i=0; i < rest_l_arr_.size(); i++)
 124     rest_l_arr_[i]->position_i_ += dy_i;
 125 }
 126
 127 void
 128 Note_column::do_print() const
 129 {
 130 #ifndef NPRINT
 131   DOUT << "rests: " << rest_l_arr_.size() << ", ";
 132   DOUT << "heads: " << head_l_arr_.size();
 133 #endif
 134 }
 135
 136 void
 137 Note_column::set_dotcol (Dot_column *d)
 138 {
 139   add_element (d);
 140 }
 141
 142 /*
 143   [TODO]
 144   handle rest under beam (do_post: beams are calculated now)
 145   what about combination of collisions and rest under beam.
 146
 147   Should lookup
 148
 149     rest -> stem -> beam -> interpolate_y_position ()
 150
 151 */
 152
 153 void
 154 Note_column::do_post_processing ()
 155 {
 156   if (!stem_l_ || !rest_b ())
 157     return;
 158
 159   Beam * b = stem_l_->beam_l_;
 160   if (!b || !b->stems_.size ())
 161     return;
 162
 163   /* ugh. Should be done by beam. */
 164   Direction d = stem_l_->get_dir ();
 165   Real beamy = (stem_l_->hpos_f () - b->stems_[0]->hpos_f ()) * b->slope_f_ + b->left_y_;
 166
 167   Real staff_space = rest_l_arr_[0]->staff_line_leading_f ();
 168   Real rest_dim = extent (Y_AXIS)[d]*2.0  /staff_space ;
 169
 170   Real minimum_dist
 171     = paper_l ()->get_var ("restcollision_minimum_beamdist") ;
 172   Real dist =
 173     minimum_dist +  -d  * (beamy - rest_dim) >? 0;
 174
 175   int stafflines = rest_l_arr_[0]->lines_i ();
 176
 177   // move discretely by half spaces.
 178   int discrete_dist = int (ceil (dist ));
 179
 180   // move by whole spaces inside the staff.
 181   if (discrete_dist < stafflines+1)
 182     discrete_dist = int (ceil (discrete_dist / 2.0)* 2.0);
 183
 184   translate_rests (-d *  discrete_dist);
 185 }