lily/bar.cc

   1 /*
   2   bar.cc -- implement Bar
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include <math.h>
   9
  10 #include "main.hh"
  11 #include "dimensions.hh"
  12 #include "dimension-cache.hh"
  13 #include "bar.hh"
  14 #include "string.hh"
  15 #include "molecule.hh"
  16 #include "paper-def.hh"
  17 #include "lookup.hh"
  18 #include "debug.hh"
  19 #include "all-font-metrics.hh"
  20
  21 Bar::Bar (SCM s)
  22   : Item (s)
  23 {
  24 }
  25
  26
  27 Real
  28 Bar::get_bar_size () const
  29 {
  30   // Never called!
  31   return 0;
  32 }
  33
  34
  35 SCM
  36 Bar::brew_molecule (SCM smob)
  37 {
  38   Score_element * self = unsmob_element (smob);
  39   Bar * fly = dynamic_cast<Bar*> (self);
  40   SCM s = self->get_elt_property ("glyph");
  41   if (gh_string_p (s))
  42     {
  43       String str  =ly_scm2string (s);
  44       return fly->compound_barline (str, fly->get_bar_size ()).create_scheme ();
  45     }
  46   return SCM_EOL;
  47 }
  48
  49 MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Bar,brew_molecule);
  50
  51 Molecule
  52 Bar::compound_barline (String str, Real h) const
  53 {
  54   Real kern = gh_scm2double (get_elt_property ("kern"));
  55   Real thinkern = gh_scm2double (get_elt_property ("thin-kern"));
  56   Real hair = gh_scm2double (get_elt_property ("hair-thickness"));
  57   Real fatline = gh_scm2double (get_elt_property ("thick-thickness"));
  58
  59   Real staffline = paper_l ()->get_var ("stafflinethickness");
  60
  61   kern *= staffline;
  62   thinkern *= staffline;
  63   hair *= staffline;
  64   fatline *= staffline;
  65
  66   Molecule thin = simple_barline (hair, h);
  67   Molecule thick = simple_barline (fatline, h);
  68   Molecule colon = lookup_l ()->afm_find ("dots-repeatcolon");
  69
  70   Molecule m;
  71
  72   if (str == "")
  73     {
  74       return lookup_l ()->blank (Box (Interval(0, 0), Interval (-h/2, h/2)));
  75     }
  76   if (str == "scorepostbreak")
  77     {
  78       return simple_barline (paper_l ()->get_var ("barthick_score"), h);
  79     }
  80   else if (str == "|")
  81     {
  82       return thin;
  83     }
  84   else if (str == "|.")
  85     {
  86       m.add_at_edge (X_AXIS, LEFT, thick, 0);
  87       m.add_at_edge (X_AXIS, LEFT, thin, kern);
  88     }
  89   else if (str == ".|")
  90     {
  91       m.add_at_edge (X_AXIS, RIGHT, thick, 0);
  92       m.add_at_edge (X_AXIS, RIGHT, thin, kern);
  93     }
  94   else if (str == ":|")
  95     {
  96       m.add_at_edge (X_AXIS, LEFT, thick, 0);
  97       m.add_at_edge (X_AXIS, LEFT, thin, kern);
  98       m.add_at_edge (X_AXIS, LEFT, colon, kern);
  99     }
 100   else if (str == "|:")
 101     {
 102       m.add_at_edge (X_AXIS, RIGHT, thick, 0);
 103       m.add_at_edge (X_AXIS, RIGHT, thin, kern);
 104       m.add_at_edge (X_AXIS, RIGHT, colon, kern);
 105     }
 106   else if (str == ":|:")
 107     {
 108       m.add_at_edge (X_AXIS, LEFT, thick, thinkern);
 109       m.add_at_edge (X_AXIS, LEFT, colon, kern);
 110       m.add_at_edge (X_AXIS, RIGHT, thick, kern);
 111       m.add_at_edge (X_AXIS, RIGHT, colon, kern);
 112     }
 113   else if (str == ".|.")
 114     {
 115       m.add_at_edge (X_AXIS, LEFT, thick, thinkern);
 116       m.add_at_edge (X_AXIS, RIGHT, thick, kern);
 117     }
 118   else if (str == "||")
 119     {
 120       m.add_at_edge (X_AXIS, RIGHT, thin, 0);
 121       m.add_at_edge (X_AXIS, RIGHT, thin, thinkern);
 122     }
 123
 124   return m;
 125 }
 126
 127
 128 Molecule
 129 Bar::simple_barline (Real w, Real h) const
 130 {
 131   return lookup_l ()->filledbox (Box (Interval(0,w), Interval(-h/2, h/2)));
 132 }
 133
 134
 135 GLUE_SCORE_ELEMENT(Bar,before_line_breaking );
 136 SCM
 137 Bar::member_before_line_breaking  ()
 138 {
 139   SCM g = get_elt_property ("glyph");
 140   SCM orig = g;
 141   Direction bsd = break_status_dir ();
 142   if (gh_string_p (g))
 143     {
 144       if (bsd)
 145         {
 146           SCM breakdir = gh_int2scm (bsd);
 147           g = scm_eval (gh_list (ly_symbol2scm ("break-barline"),
 148                                  g,
 149                                  breakdir,
 150                                  SCM_UNDEFINED));
 151         }
 152     }
 153   else
 154     {
 155       g = SCM_UNDEFINED;
 156     }
 157
 158   if (!gh_string_p (g))
 159     {
 160       set_elt_property ("molecule-callback", SCM_BOOL_T);
 161       set_extent_callback (0, X_AXIS);
 162       // leave y_extent for spanbar?
 163     }
 164   else if (! gh_equal_p  (g, orig))
 165     set_elt_property ("glyph", g);
 166
 167
 168   return SCM_UNDEFINED;
 169 }
 170
 171