lily/stanza-number-align-engraver.cc

   1 /*
   2   stanza-number-align-engraver.cc -- implement Stanza_number_align_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2004--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "context.hh"
  10 #include "engraver.hh"
  11 #include "note-head.hh"
  12 #include "lyric-extender.hh"
  13 #include "pointer-group-interface.hh"
  14 #include "side-position-interface.hh"
  15
  16 #include "translator.icc"
  17
  18 class Stanza_number_align_engraver : public Engraver
  19 {
  20 public:
  21   TRANSLATOR_DECLARATIONS (Stanza_number_align_engraver);
  22
  23 protected:
  24   vector<Grob*> lyrics_;
  25   vector<Grob*> stanza_numbers_;
  26
  27   DECLARE_ACKNOWLEDGER (lyric_syllable);
  28   DECLARE_ACKNOWLEDGER (stanza_number);
  29   void stop_translation_timestep ();
  30 };
  31
  32 Stanza_number_align_engraver::Stanza_number_align_engraver ()
  33 {
  34 }
  35
  36 void
  37 Stanza_number_align_engraver::acknowledge_lyric_syllable (Grob_info gi)
  38 {
  39   Grob *h = gi.grob ();
  40   lyrics_.push_back (h);
  41 }
  42
  43 void
  44 Stanza_number_align_engraver::acknowledge_stanza_number (Grob_info gi)
  45 {
  46   Grob *h = gi.grob ();
  47   stanza_numbers_.push_back (h);
  48 }
  49
  50 void
  51 Stanza_number_align_engraver::stop_translation_timestep ()
  52 {
  53   for (vsize i = lyrics_.size (); i--;)
  54     for (vsize j = stanza_numbers_.size (); j--;)
  55       Side_position_interface::add_support (stanza_numbers_[j], lyrics_[i]);
  56
  57   stanza_numbers_.clear ();
  58   lyrics_.clear ();
  59 }
  60
  61 ADD_ACKNOWLEDGER (Stanza_number_align_engraver, lyric_syllable);
  62 ADD_ACKNOWLEDGER (Stanza_number_align_engraver, stanza_number);
  63
  64 ADD_TRANSLATOR (Stanza_number_align_engraver,
  65                 /* doc */
  66                 "This engraver ensures that stanza numbers are neatly"
  67                 " aligned.",
  68
  69                 /* create */
  70                 "",
  71
  72                 /* read */
  73                 "",
  74
  75                 /* write */
  76                 "");
  77