lily/chord-name-engraver.cc

   1 /*
   2   chord-name-engraver.cc -- implement Chord_name_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--1999 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "chord-name-engraver.hh"
  10 #include "chord.hh"
  11 #include "musical-request.hh"
  12 #include "paper-def.hh"
  13 #include "lookup.hh"
  14 #include "paper-def.hh"
  15 #include "main.hh"
  16 #include "dimensions.hh"
  17 #include "text-item.hh"
  18
  19 ADD_THIS_TRANSLATOR (Chord_name_engraver);
  20
  21 Chord_name_engraver::Chord_name_engraver ()
  22 {
  23   chord_p_ = 0;
  24   tonic_req_ = 0;
  25   inversion_req_ = 0;
  26   bass_req_ = 0;
  27 }
  28
  29 void
  30 Chord_name_engraver::acknowledge_element (Score_element_info i)
  31 {
  32   if (Note_req* n = dynamic_cast<Note_req*> (i.req_l_))
  33     pitch_arr_.push (n->pitch_);
  34 }
  35
  36 bool
  37 Chord_name_engraver::do_try_music (Music* m)
  38 {
  39   if (Note_req* n = dynamic_cast<Note_req*> (m))
  40     {
  41       pitch_arr_.push (n->pitch_);
  42       return true;
  43     }
  44   if (Tonic_req* t = dynamic_cast<Tonic_req*> (m))
  45     {
  46       tonic_req_ = t;
  47       return true;
  48     }
  49   if (Inversion_req* i = dynamic_cast<Inversion_req*> (m))
  50     {
  51       inversion_req_ = i;
  52       return true;
  53     }
  54   if (Bass_req* b = dynamic_cast<Bass_req*> (m))
  55     {
  56       bass_req_ = b;
  57       return true;
  58     }
  59   return false;
  60 }
  61
  62 void
  63 Chord_name_engraver::do_process_requests ()
  64 {
  65   if (chord_p_)
  66     return;
  67   if (!pitch_arr_.size ())
  68     return;
  69
  70   bool find_inversion_b = false;
  71   SCM chord_inversion = get_property ("chordInversion", 0);
  72   if (gh_boolean_p (chord_inversion))
  73     find_inversion_b = gh_scm2bool (chord_inversion);
  74
  75   chord_p_ = new Chord (to_chord (pitch_arr_, tonic_req_, inversion_req_, bass_req_, find_inversion_b));
  76
  77   announce_element (Score_element_info (chord_p_, 0));
  78 }
  79
  80 void
  81 Chord_name_engraver::do_pre_move_processing ()
  82 {
  83   if (chord_p_)
  84     {
  85       typeset_element (chord_p_);
  86     }
  87   pitch_arr_.clear ();
  88   chord_p_ = 0;
  89   tonic_req_ = 0;
  90   inversion_req_ = 0;
  91   bass_req_ = 0;
  92 }
  93