lily/note-head.cc

   1 /*
   2   notehead.cc -- implement Note_head
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "misc.hh"
  10 #include "dots.hh"
  11 #include "note-head.hh"
  12 #include "debug.hh"
  13 #include "lookup.hh"
  14 #include "molecule.hh"
  15 #include "musical-request.hh"
  16 #include "dimension-cache.hh"
  17 #include "staff-symbol-referencer.hh"
  18
  19
  20
  21 /*
  22   build a ledger line for small pieces.
  23  */
  24 Molecule
  25 Note_head::ledger_line (Interval xwid) const
  26 {
  27   Drul_array<Molecule> endings;
  28   endings[LEFT] = lookup_l()->afm_find ("noteheads-ledgerending");
  29   Molecule *e = &endings[LEFT];
  30   endings[RIGHT] = *e;
  31
  32   Real thick = e->extent (Y_AXIS).length();
  33   Real len = e->extent (X_AXIS).length () - thick;
  34
  35   Molecule total;
  36   Direction d = LEFT;
  37   do {
  38     endings[d].translate_axis (xwid[d] - endings[d].extent (X_AXIS)[d], X_AXIS);
  39     total.add_molecule (endings[d]);
  40   } while ((flip(&d)) != LEFT);
  41
  42   Real xpos = xwid [LEFT] + len;
  43
  44   while (xpos + len + thick /2 <= xwid[RIGHT])
  45     {
  46       e->translate_axis (len, X_AXIS);
  47       total.add_molecule (*e);
  48       xpos += len;
  49     }
  50
  51   return total;
  52 }
  53
  54
  55 GLUE_SCORE_ELEMENT(Note_head,before_line_breaking);
  56 SCM
  57 Note_head::member_before_line_breaking ()
  58 {
  59   // 8 ball looks the same as 4 ball:
  60
  61   if (balltype_i () > 2)
  62     set_elt_property ("duration-log", gh_int2scm (2));
  63
  64   if (Dots *d = dots_l ())
  65     { // move into Rhythmic_head?
  66       Staff_symbol_referencer_interface si (d);
  67       Staff_symbol_referencer_interface me (this);
  68
  69       si.set_position(int (me.position_f ()));
  70     }
  71
  72   return SCM_UNDEFINED;
  73 }
  74
  75
  76
  77 GLUE_SCORE_ELEMENT(Note_head,brew_molecule);
  78
  79 SCM
  80 Note_head::member_brew_molecule () const
  81 {
  82   Staff_symbol_referencer_interface si (this);
  83
  84   Real inter_f = si.staff_space ()/2;
  85   int sz = si.line_count ()-1;
  86   Real p = si.position_f ();
  87   int streepjes_i = abs (p) < sz
  88     ? 0
  89     : (abs((int)p) - sz) /2;
  90
  91   SCM style  = get_elt_property ("style");
  92   if (style == SCM_UNDEFINED)
  93     {
  94       style = ly_symbol2scm("default");
  95     }
  96
  97   Molecule out = lookup_l()->afm_find (String ("noteheads-") +
  98                 ly_scm2string (scm_eval (gh_list (ly_symbol2scm("find-notehead-symbol"),
  99                                                   gh_int2scm(balltype_i ()),
 100                                                   ly_quote_scm(style),
 101                                                   SCM_UNDEFINED))));
 102
 103   if (streepjes_i)
 104     {
 105       Direction dir = (Direction)sign (p);
 106       Interval hd = out.extent (X_AXIS);
 107       Real hw = hd.length ()/4;
 108       Molecule ledger (ledger_line  (Interval (hd[LEFT] - hw,
 109                                                hd[RIGHT] + hw)));
 110
 111
 112       ledger.set_empty (true);
 113       int parity =  abs(int (p)) % 2;
 114
 115       for (int i=0; i < streepjes_i; i++)
 116         {
 117           Molecule s (ledger);
 118           s.translate_axis (-dir * inter_f * (i*2 + parity),
 119                            Y_AXIS);
 120           out.add_molecule (s);
 121         }
 122     }
 123   return out.create_scheme();
 124 }
 125
 126
 127 Note_head::Note_head (SCM s)
 128   : Rhythmic_head (s)
 129 {
 130
 131 }