lily/abbrev.cc

   1 /*
   2   abbrev.cc --  implement Abbreviation
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "abbrev.hh"
  11 #include "debug.hh"
  12 #include "beam.hh"
  13 #include "paper-def.hh"
  14 #include "lookup.hh"
  15 #include "stem.hh"
  16 #include "offset.hh"
  17
  18 Abbreviation::Abbreviation ()
  19 {
  20   stem_l_ = 0;
  21   abbrev_flags_i_ = 1;
  22 }
  23
  24 void
  25 Abbreviation::do_print () const
  26 {
  27   DOUT << "abbrev_flags_i_ " << abbrev_flags_i_;
  28 }
  29
  30 Molecule*
  31 Abbreviation::do_brew_molecule_p () const
  32 {
  33   Beam * b = stem_l_->beam_l_;
  34   int mult =0;
  35   if (b)
  36     {
  37       Stem_info i = b->get_stem_info (stem_l_);
  38       mult = i.mult_i_;
  39     }
  40
  41   Real interbeam_f = paper_l ()->interbeam_f (mult);
  42   Real w = 1.5 * lookup_l ()->notehead (2, "").dim_[X_AXIS].length ();
  43   Real space = stem_l_->staff_line_leading_f ();
  44   Real internote_f = space/2;
  45
  46   Real beam_f = paper_l ()->beam_thickness_f ();
  47
  48   int beams_i = 0;
  49   Real slope_f = internote_f / 4 / internote_f; // HUH?
  50
  51   if (stem_l_ && stem_l_->beam_l_) {
  52     slope_f = stem_l_->beam_l_->slope_f_;
  53     // ugh, rather calc from Abbreviation_req
  54     beams_i = stem_l_->beams_i_drul_[RIGHT] >? stem_l_->beams_i_drul_[LEFT];
  55   }
  56   Real sl = slope_f * internote_f;
  57
  58   Molecule a (lookup_l ()->beam (sl, w, beam_f));
  59   a.translate (Offset (-w/2, w / 2 * slope_f));
  60
  61   Molecule *beams= new Molecule;
  62   for (int i = 0; i < abbrev_flags_i_; i++)
  63     {
  64       Molecule b (a);
  65       b.translate_axis (interbeam_f * i, Y_AXIS);
  66       beams->add_molecule (b);
  67     }
  68   beams->translate_axis (-beams->extent ()[Y_AXIS].center (), Y_AXIS);
  69
  70   if (stem_l_)
  71     {
  72       if (stem_l_->beam_l_)
  73         {
  74           beams->translate (Offset(stem_l_->hpos_f () - hpos_f (),
  75             stem_l_->stem_end_f () * internote_f -
  76             stem_l_->beam_l_->dir_ * beams_i * interbeam_f));
  77         }
  78       else
  79         {
  80           /*
  81             Beams should intersect one beamthickness below staff end
  82            */
  83           Real dy = - beams->extent ()[Y_AXIS].length () / 2 * stem_l_->dir_;
  84           dy /= internote_f;
  85           dy += stem_l_->stem_end_f ();
  86           dy *= internote_f;
  87 // urg: can't: stem should be stetched first
  88 //        dy -= paper_l ()->beam_thickness_f () * stem_l_->dir_;
  89           beams->translate (Offset(stem_l_->hpos_f () - hpos_f (), dy));
  90         }
  91
  92       /*
  93         there used to be half a page of code that was long commented out.
  94         Removed in 1.1.35
  95        */
  96     }
  97
  98   return beams;
  99 }
 100
 101 void
 102 Abbreviation::do_substitute_element_pointer (Score_element*o, Score_element*n)
 103 {
 104   if (stem_l_ == o)
 105     stem_l_ = dynamic_cast<Stem*> (n);
 106 }
 107
 108
 109 void
 110 Abbreviation::set_stem (Stem *s)
 111 {
 112   stem_l_ = s;
 113   add_dependency (s);
 114 }