lily/key-item.cc

   1 /*
   2   key-item.cc -- implement Key_item
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7
   8   keyplacement by Mats Bengtsson
   9 */
  10
  11 #include "key-item.hh"
  12 #include "key.hh"
  13 #include "debug.hh"
  14 #include "molecule.hh"
  15 #include "paper-def.hh"
  16 #include "lookup.hh"
  17
  18 #include "key-grav.hh"
  19
  20 const int FLAT_TOP_PITCH=2; /* fes,ges,as and bes typeset in lower octave */
  21 const int SHARP_TOP_PITCH=4; /*  ais and bis typeset in lower octave */
  22
  23 Key_item::Key_item (int c)
  24 {
  25   breakable_b_ =true;
  26   default_b_ = false;
  27   set_c_position (c);
  28 }
  29
  30 void
  31 Key_item::read (Key_engraver const & key_grav_r)
  32 {
  33   assert (!key_grav_r.key_.multi_octave_b_);
  34   const Array<int> &idx_arr =key_grav_r.accidental_idx_arr_;
  35   for (int i = 0 ; i< idx_arr.size(); i++)
  36     {
  37       int note = idx_arr[i];
  38       int acc = ((Key &) key_grav_r.key_).oct (0).acc (note);
  39
  40       add (note, acc);
  41     }
  42 }
  43
  44 void
  45 Key_item::set_c_position (int c0)
  46 {
  47   int from_bottom_pos = c0 + 4; // ugh
  48   int octaves =(from_bottom_pos / 7) +1 ;
  49   from_bottom_pos =(from_bottom_pos + 7*octaves)%7;
  50   c_position  = from_bottom_pos - 4;
  51 }
  52
  53
  54 void
  55 Key_item::add (int p, int a)
  56 {
  57   if ((a<0 && ((p>FLAT_TOP_PITCH) || (p+c_position>4)) && (p+c_position>1))
  58       ||
  59       (a>0 && ((p>SHARP_TOP_PITCH) || (p+c_position>5)) && (p+c_position>2)))
  60     {
  61       p -= 7; /* Typeset below c_position */
  62     }
  63   pitch.push (p);
  64   acc.push (a);
  65 }
  66
  67
  68 Molecule*
  69 Key_item::brew_molecule_p() const
  70 {
  71   Molecule*output = new Molecule;
  72   Real inter = paper()->internote_f ();
  73
  74   for (int i =0; i < pitch.size(); i++)
  75     {
  76       Atom a =paper()->lookup_l ()->accidental (acc[i]);
  77       a.translate_axis ((c_position + pitch[i]) * inter, Y_AXIS);
  78       Molecule m (a);
  79       output->add_at_edge (X_AXIS, RIGHT, m);
  80     }
  81   if (pitch.size())
  82     {
  83       Molecule m (paper()->lookup_l ()->fill (Box (
  84                                                    Interval (0, paper()->note_width ()),
  85                                                    Interval (0,0))));
  86
  87       output->add_at_edge (X_AXIS, RIGHT, m);
  88     }
  89   return output;
  90 }
  91
  92 IMPLEMENT_IS_TYPE_B1(Key_item,Item);
  93
  94 void
  95 Key_item::do_pre_processing()
  96 {
  97   if (default_b_)
  98     {
  99       transparent_b_ = (break_status_i() != 1);
 100       set_empty (transparent_b_);
 101     }
 102 }