lily/time-signature.cc

   1 /*
   2   time-signature.cc --  implement Time_signature
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10
  11 #include "molecule.hh"
  12 #include "time-signature.hh"
  13 #include "paper-def.hh"
  14 #include "lookup.hh"
  15
  16 Time_signature::Time_signature (SCM s)
  17   :  Item (s)
  18 {
  19
  20 }
  21
  22 // ugh.!
  23
  24 GLUE_SCORE_ELEMENT(Time_signature,brew_molecule);
  25 SCM
  26 Time_signature::member_brew_molecule () const
  27 {
  28   SCM st = get_elt_property ("style");
  29
  30   SCM frac = get_elt_property ("fraction");
  31   int n = 4;
  32   int d = 4;
  33   if (gh_pair_p (frac))
  34     {
  35       n = gh_scm2int (gh_car (frac));
  36       d = gh_scm2int (gh_cdr (frac));
  37     }
  38
  39
  40   if (gh_string_p (st))
  41     {
  42       String style (ly_scm2string (st));
  43       if (style[0]=='1')
  44         {
  45           return time_signature (n, 0).create_scheme();
  46         }
  47       else
  48         {
  49           return special_time_signature (style, n, d).create_scheme();
  50         }
  51     }
  52   else
  53     return time_signature (n,d).create_scheme();
  54 }
  55
  56 Molecule
  57 Time_signature::special_time_signature (String s, int n, int d) const
  58 {
  59   // First guess: s contains only the signature style
  60   String symbolname = "timesig-" + s + to_str (n) + "/" + to_str (d);
  61
  62   Molecule m = lookup_l ()->afm_find (symbolname, false);
  63   if (!m.empty_b())
  64     return m;
  65
  66   // Second guess: s contains the full signature name
  67   m = lookup_l ()->afm_find ("timesig-"+s, false);
  68   if (!m.empty_b ())
  69     return m;
  70
  71   // Resort to default layout with numbers
  72   return time_signature (n,d);
  73 }
  74
  75
  76 Molecule
  77 Time_signature::time_signature (int num, int den) const
  78 {
  79   String sty = "timesig";
  80
  81   /*
  82     UGH: need to look at fontsize.
  83    */
  84   Molecule n (lookup_l ()->text (sty, to_str (num), paper_l ()));
  85   Molecule d (lookup_l ()->text (sty, to_str (den), paper_l ()));
  86   n.align_to (X_AXIS, CENTER);
  87   d.align_to (X_AXIS, CENTER);
  88   Molecule m;
  89   if (den)
  90     {
  91       m.add_at_edge (Y_AXIS, UP, n, 0.0);
  92       m.add_at_edge (Y_AXIS, DOWN, d, 0.0);
  93     }
  94   else
  95     {
  96       m = n;
  97       m.align_to (Y_AXIS, CENTER);
  98     }
  99   return m;
 100 }
 101