lily/abbrev.cc

   1 /*
   2   abbrev.cc --  implement Abbreviation
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.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 "dimen.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::brew_molecule_p () const
  32 {
  33   Real dy = paper ()->interbeam_f ();
  34   Real w = 1.5 * paper ()->lookup_l ()->ball (2).dim_.x ().length ();
  35   Real interline_f = paper ()->interline_f ();
  36   Real beamdy = interline_f/2;
  37
  38   int beams_i = 0;
  39   Real slope_f = paper ()->internote_f () / 4;
  40
  41   if (stem_l_ && stem_l_->beam_l_) {
  42     // huh?
  43     slope_f = 2 * stem_l_->beam_l_->slope_f_;
  44     // ugh, rather calc from Abbreviation_req
  45     beams_i = stem_l_->beams_right_i_ >? stem_l_->beams_left_i_;
  46   }
  47   paper ()->lookup_l ()->beam (slope_f, 20 PT, 1 PT);
  48
  49   Atom a (paper ()->lookup_l ()->beam (slope_f, w, .48 * interline_f));
  50   a.translate (Offset (-w/2, w / 2 * slope_f));
  51
  52   Molecule *beams= new Molecule;
  53   for (int i = 0; i < abbrev_flags_i_; i++)
  54     {
  55       Atom b (a);
  56       b.translate_axis (dy * i, Y_AXIS);
  57       beams->add (b);
  58     }
  59   beams->translate_axis (-beams->extent ()[Y_AXIS].center (), Y_AXIS);
  60
  61   if (stem_l_)
  62     {
  63       /* Try to be in the middle of the open part of the stem and
  64          between on the staff.
  65
  66          (urgh)
  67       */
  68       Direction sd  = stem_l_->dir_;
  69       Interval empty_stem (stem_l_->chord_start_f () * sd ,
  70                            (stem_l_->stem_end_f ()* sd) - beams_i * dy);
  71       empty_stem *= sd;
  72
  73       Interval instaff = empty_stem;
  74       instaff.intersect (interline_f * Interval (-2,2));
  75       if (instaff.empty_b ())
  76         instaff = empty_stem;
  77
  78       instaff.print ();
  79       beams->translate (Offset(stem_l_->hpos_f () - hpos_f (),
  80                           instaff.center ()));
  81     }
  82
  83   return beams;
  84 }
  85
  86 void
  87 Abbreviation::do_substitute_dependent (Score_elem*o, Score_elem*n)
  88 {
  89   if (stem_l_ == o)
  90     stem_l_ = n ? (Stem*)n->item () : 0;
  91 }
  92
  93
  94 void
  95 Abbreviation::set_stem (Stem *s)
  96 {
  97   stem_l_ = s;
  98   add_dependency (s);
  99 }