lily/chord-name.cc

   1 /*
   2   chord-name.cc -- implement Chord_name
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1999--2000 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "chord-name.hh"
  10 #include "musical-request.hh"
  11 #include "warn.hh"
  12 #include "debug.hh"
  13 #include "molecule.hh"
  14 #include "paper-def.hh"
  15 #include "lookup.hh"
  16 #include "staff-symbol-referencer.hh"
  17
  18
  19 /*
  20   TODO: move text lookup out of Chord_name
  21  */
  22
  23 /*
  24   word is roman text or property-styled text:
  25    "text"
  26    ("text" . property-alist)
  27  */
  28
  29 Molecule
  30 Chord_name::ly_word2molecule (SCM word, Real* x) const
  31 {
  32   *x = 0;
  33
  34   SCM options_alist = SCM_EOL;
  35   if (gh_pair_p (word))
  36     {
  37       options_alist = gh_cdr (word);
  38       word = gh_car (word);
  39     }
  40
  41   if (gh_string_p (word))
  42     {
  43       /*
  44         UGH. Should read from font metric structure.
  45       */
  46       Real ex = lookup_l ()->text ("", "x",
  47                                    paper_l ()).extent (Y_AXIS).length ();
  48       Real em = lookup_l ()->text ("", "m",
  49                                    paper_l ()).extent (X_AXIS).length ();
  50
  51       String w = ly_scm2string (word);
  52
  53       String style;
  54       SCM s = scm_assoc (ly_symbol2scm ("style"), options_alist);
  55       if (s != SCM_BOOL_F)
  56         {
  57           style = ly_scm2string (gh_cdr (s));
  58         }
  59
  60       Offset offset;
  61       int size = 0;
  62       /*
  63         urg, `type'
  64       */
  65       s = scm_assoc (ly_symbol2scm ("type"), options_alist);
  66       if (s != SCM_BOOL_F && ly_scm2string (gh_cdr (s)) == "super")
  67         {
  68           Real super_y = ex / 2;
  69           offset = Offset (0, super_y);
  70           if (!size)
  71             size = -2;
  72         }
  73
  74       s = scm_assoc (ly_symbol2scm ("size"), options_alist);
  75       if (s != SCM_BOOL_F)
  76         {
  77           size = gh_scm2int (gh_cdr (s));
  78         }
  79
  80       s = scm_assoc (ly_symbol2scm ("offset"), options_alist);
  81       if (s != SCM_BOOL_F)
  82         {
  83           // hmm
  84           SCM o = gh_cdr (s);
  85           if (gh_pair_p (o))
  86             offset = Offset (0, gh_scm2double (gh_cdr (o))) * ex;
  87           *x = gh_scm2double (gh_car (o)) * em;
  88         }
  89
  90       Molecule mol;
  91       s = scm_assoc (ly_symbol2scm ("font"), options_alist);
  92       if (s != SCM_BOOL_F && ly_scm2string (gh_cdr (s)) == "feta")
  93         mol = paper_l ()->lookup_l (size)->afm_find (w);
  94       else
  95         mol = paper_l ()->lookup_l (size)->text (style, w, paper_l ());
  96
  97       mol.translate (offset);
  98       return mol;
  99     }
 100   return Molecule ();
 101 }
 102
 103 /*
 104   ;; text: list of word
 105   ;; word: string + optional list of property
 106   ;; property: align, kern, font (?), size
 107  */
 108 Molecule
 109 Chord_name::ly_text2molecule (SCM text) const
 110 {
 111   Molecule mol;
 112   if (gh_list_p (text))
 113     {
 114       while (gh_cdr (text) != SCM_EOL)
 115         {
 116           Real x;
 117           Molecule m = ly_word2molecule (gh_car (text), &x);
 118           if (!m.empty_b ())
 119             mol.add_at_edge (X_AXIS, RIGHT, m, x);
 120           text = gh_cdr (text);
 121         }
 122       text = gh_car (text);
 123     }
 124   Real x;
 125   Molecule m = ly_word2molecule (text, &x);
 126   if (!m.empty_b ())
 127     mol.add_at_edge (X_AXIS, RIGHT, m, x);
 128   return mol;
 129 }
 130
 131 MAKE_SCHEME_SCORE_ELEMENT_CALLBACK(Chord_name,brew_molecule);
 132
 133 SCM
 134 Chord_name::brew_molecule (SCM smob)
 135 {
 136   Score_element *sc = unsmob_element (smob);
 137   SCM style = sc->get_elt_property ("style");
 138   if (style == SCM_UNDEFINED)
 139     style = ly_str02scm ("banter");
 140
 141   SCM inversion = sc-> get_elt_property ("inversion");
 142   if (inversion == SCM_UNDEFINED)
 143     inversion = SCM_BOOL_F;
 144
 145   SCM bass =  sc->get_elt_property ("bass");
 146   if (bass == SCM_UNDEFINED)
 147     bass = SCM_BOOL_F;
 148
 149   SCM pitches =  sc->get_elt_property ("pitches");
 150
 151   SCM text = scm_eval (gh_list (ly_symbol2scm ("chord::user-name"),
 152                                 style,
 153                                 ly_quote_scm (pitches),
 154                                 ly_quote_scm (gh_cons (inversion, bass)),
 155                                 SCM_UNDEFINED));
 156
 157   return dynamic_cast<Chord_name*> (sc)->
 158     ly_text2molecule (text).create_scheme ();
 159 }
 160
 161 Chord_name::Chord_name (SCM s)
 162   : Item (s)
 163 {
 164 }