lily/font-interface.cc

   1 /*
   2   font-interface.cc --  implement Font_interface
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "all-font-metrics.hh"
  11 #include "font-metric.hh"
  12 #include "font-interface.hh"
  13 #include "score-element.hh"
  14 #include "paper-def.hh"
  15
  16 /*
  17   todO : split up this func, reuse in text_item?
  18  */
  19 Font_metric *
  20 Font_interface::get_default_font (Score_element*me)
  21 {
  22   Font_metric * fm =  unsmob_metrics (me->get_elt_property ("font"));
  23   if (fm)
  24     return fm;
  25
  26   SCM ss = me->paper_l ()->style_sheet_;
  27
  28   SCM proc = gh_cdr (scm_assoc (ly_symbol2scm ("properties-to-font"),
  29                                 ss));
  30
  31   SCM fonts = gh_cdr (scm_assoc (ly_symbol2scm ("fonts"), ss));
  32   SCM defaults = gh_cdr (scm_assoc (ly_symbol2scm ("font-defaults"),
  33                                     ss));
  34
  35   assert (gh_procedure_p (proc));
  36   SCM font_name = gh_call2 (proc, fonts,
  37                             gh_list (me->mutable_property_alist_,
  38                                      me->immutable_property_alist_,
  39                                      defaults,
  40                                      SCM_UNDEFINED));
  41
  42   fm = me->paper_l ()->find_font (font_name, 1.0);
  43   me->set_elt_property ("font", fm->self_scm ());
  44   return fm;
  45 }