lily/font-interface.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2000--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "font-interface.hh"
  21
  22 #include "all-font-metrics.hh"
  23 #include "output-def.hh"
  24 #include "warn.hh"
  25 #include "grob.hh"
  26
  27 /* todo: split up this func, reuse in text_item?  */
  28 Font_metric *
  29 Font_interface::get_default_font (Grob *me)
  30 {
  31   Font_metric *fm = unsmob_metrics (me->get_property ("font"));
  32   if (!fm)
  33     {
  34       SCM chain = music_font_alist_chain (me);
  35
  36       fm = select_font (me->layout (), chain);
  37       me->set_property ("font", fm->self_scm ());
  38     }
  39
  40   return fm;
  41 }
  42
  43 SCM
  44 Font_interface::music_font_alist_chain (Grob *g)
  45 {
  46   SCM defaults
  47     = g->layout ()->lookup_variable (ly_symbol2scm ("font-defaults"));
  48   if (defaults == SCM_UNDEFINED)
  49     defaults = SCM_EOL;
  50   return g->get_property_alist_chain (defaults);
  51 }
  52
  53 SCM
  54 Font_interface::text_font_alist_chain (Grob *g)
  55 {
  56   SCM defaults
  57     = g->layout ()->lookup_variable (ly_symbol2scm ("text-font-defaults"));
  58   if (defaults == SCM_UNDEFINED)
  59     defaults = SCM_EOL;
  60   return g->get_property_alist_chain (defaults);
  61 }
  62
  63 ADD_INTERFACE (Font_interface,
  64                "Any symbol that is typeset through fixed sets of glyphs,"
  65                " (i.e., fonts).",
  66
  67                /* properties */
  68                "font "
  69                "font-encoding "
  70                "font-family "
  71                "font-name "
  72                "font-series "
  73                "font-shape "
  74                "font-size "
  75                );