lily/font-size-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2001--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 "grob.hh"
  21 #include "engraver.hh"
  22
  23 class Font_size_engraver : public Engraver
  24 {
  25
  26   TRANSLATOR_DECLARATIONS (Font_size_engraver);
  27 protected:
  28   DECLARE_ACKNOWLEDGER (font);
  29   void process_music ();
  30   Real size;
  31 private:
  32 };
  33
  34 Font_size_engraver::Font_size_engraver ()
  35 {
  36   size = 0.0;
  37 }
  38
  39 void
  40 Font_size_engraver::process_music ()
  41 {
  42   size = robust_scm2double (get_property ("fontSize"), 0.0);
  43 }
  44
  45 void
  46 Font_size_engraver::acknowledge_font (Grob_info gi)
  47 {
  48   /*
  49     We only want to process a grob once.
  50   */
  51   if (!size)
  52     return;
  53
  54   if (gi.context () != context ())
  55     return;
  56
  57   Real font_size = size
  58     + robust_scm2double (gi.grob ()->get_property ("font-size"), 0);
  59   gi.grob ()->set_property ("font-size", scm_from_double (font_size));
  60 }
  61
  62 #include "translator.icc"
  63
  64 ADD_ACKNOWLEDGER (Font_size_engraver, font);
  65 ADD_TRANSLATOR (Font_size_engraver,
  66                 /* doc */
  67                 "Put @code{fontSize} into @code{font-size} grob property.",
  68
  69                 /* create */
  70                 "",
  71
  72                 /* read */
  73                 "fontSize ",
  74
  75                 /* write */
  76                 ""
  77                 );