lily/stanza-number-align-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2004--2010 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 "context.hh"
  21 #include "engraver.hh"
  22 #include "note-head.hh"
  23 #include "lyric-extender.hh"
  24 #include "pointer-group-interface.hh"
  25 #include "side-position-interface.hh"
  26
  27 #include "translator.icc"
  28
  29 class Stanza_number_align_engraver : public Engraver
  30 {
  31 public:
  32   TRANSLATOR_DECLARATIONS (Stanza_number_align_engraver);
  33
  34 protected:
  35   vector<Grob*> lyrics_;
  36   vector<Grob*> stanza_numbers_;
  37
  38   DECLARE_ACKNOWLEDGER (lyric_syllable);
  39   DECLARE_ACKNOWLEDGER (stanza_number);
  40   void stop_translation_timestep ();
  41 };
  42
  43 Stanza_number_align_engraver::Stanza_number_align_engraver ()
  44 {
  45 }
  46
  47 void
  48 Stanza_number_align_engraver::acknowledge_lyric_syllable (Grob_info gi)
  49 {
  50   Grob *h = gi.grob ();
  51   lyrics_.push_back (h);
  52 }
  53
  54 void
  55 Stanza_number_align_engraver::acknowledge_stanza_number (Grob_info gi)
  56 {
  57   Grob *h = gi.grob ();
  58   stanza_numbers_.push_back (h);
  59 }
  60
  61 void
  62 Stanza_number_align_engraver::stop_translation_timestep ()
  63 {
  64   for (vsize i = lyrics_.size (); i--;)
  65     for (vsize j = stanza_numbers_.size (); j--;)
  66       Side_position_interface::add_support (stanza_numbers_[j], lyrics_[i]);
  67
  68   stanza_numbers_.clear ();
  69   lyrics_.clear ();
  70 }
  71
  72 ADD_ACKNOWLEDGER (Stanza_number_align_engraver, lyric_syllable);
  73 ADD_ACKNOWLEDGER (Stanza_number_align_engraver, stanza_number);
  74
  75 ADD_TRANSLATOR (Stanza_number_align_engraver,
  76                 /* doc */
  77                 "This engraver ensures that stanza numbers are neatly"
  78                 " aligned.",
  79
  80                 /* create */
  81                 "",
  82
  83                 /* read */
  84                 "",
  85
  86                 /* write */
  87                 "");
  88