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--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "all-font-metrics.hh"
  10 #include "font-metric.hh"
  11 #include "font-interface.hh"
  12 #include "grob.hh"
  13 #include "output-def.hh"
  14 #include "warn.hh"
  15
  16
  17 /* todo: split up this func, reuse in text_item?  */
  18 Font_metric *
  19 Font_interface::get_default_font (Grob *me)
  20 {
  21   Font_metric *fm = unsmob_metrics (me->get_property ("font"));
  22   if (!fm)
  23     {
  24       SCM defaults
  25         = me->get_paper ()->lookup_variable (ly_symbol2scm ("font-defaults"));
  26       SCM chain = me->get_property_alist_chain (defaults);
  27
  28       fm = select_font (me->get_paper (), chain);
  29       me->set_property ("font", fm->self_scm ());
  30     }
  31
  32   return fm;
  33 }
  34
  35 LY_DEFINE (ly_font_interface_get_default_font, "ly:get-default-font",
  36           1 , 0, 0, (SCM grob),
  37           "Return the default font for grob @var{gr}.")
  38 {
  39   Grob *gr = unsmob_grob (grob);
  40   SCM_ASSERT_TYPE (gr, grob, SCM_ARG1, __FUNCTION__, "grob");
  41
  42   return Font_interface::get_default_font (gr)->self_scm ();
  43 }
  44
  45
  46 SCM
  47 Font_interface::text_font_alist_chain (Grob *g)
  48 {
  49   SCM defaults
  50     = g->get_paper ()->lookup_variable (ly_symbol2scm ("text-font-defaults"));
  51   return g->get_property_alist_chain (defaults);
  52 }
  53
  54 ADD_INTERFACE (Font_interface, "font-interface",
  55                "Any symbol that is typeset through fixed sets of glyphs, "
  56                " (ie. fonts)",
  57                "font-magnification font font-series font-shape "
  58                "font-family font-encoding font-name font-size");