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--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "font-interface.hh"
  10
  11 #include "all-font-metrics.hh"
  12 #include "output-def.hh"
  13 #include "warn.hh"
  14 #include "grob.hh"
  15
  16 /* todo: split up this func, reuse in text_item?  */
  17 Font_metric *
  18 Font_interface::get_default_font (Grob *me)
  19 {
  20   Font_metric *fm = unsmob_metrics (me->get_property ("font"));
  21   if (!fm)
  22     {
  23       SCM chain = music_font_alist_chain (me);
  24
  25       fm = select_font (me->layout (), chain);
  26       me->set_property ("font", fm->self_scm ());
  27     }
  28
  29   return fm;
  30 }
  31
  32 SCM
  33 Font_interface::music_font_alist_chain (Grob *g)
  34 {
  35   SCM defaults
  36     = g->layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
  37   if (defaults == SCM_UNDEFINED)
  38     defaults = SCM_EOL;
  39   return g->get_property_alist_chain (defaults);
  40 }
  41
  42 SCM
  43 Font_interface::text_font_alist_chain (Grob *g)
  44 {
  45   SCM defaults
  46     = g->layout ()->lookup_variable (ly_symbol2scm ("text-font-defaults"));
  47   if (defaults == SCM_UNDEFINED)
  48     defaults = SCM_EOL;
  49   return g->get_property_alist_chain (defaults);
  50 }
  51
  52 ADD_INTERFACE (Font_interface,
  53                "Any symbol that is typeset through fixed sets of glyphs,"
  54                " (i.e., fonts).",
  55
  56                /* properties */
  57                "font "
  58                "font-encoding "
  59                "font-family "
  60                "font-name "
  61                "font-series "
  62                "font-shape "
  63                "font-size "
  64                );