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--2000 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "engraver.hh"
  10 #include "chord-name.hh"
  11 #include "chord.hh"
  12 #include "musical-request.hh"
  13 #include "paper-def.hh"
  14 #include "lookup.hh"
  15 #include "paper-def.hh"
  16 #include "main.hh"
  17 #include "dimensions.hh"
  18 #include "item.hh"
  19 #include "musical-pitch.hh"
  20
  21 class Chord_name_engraver : public Engraver
  22 {
  23 public:
  24   Chord_name_engraver ();
  25   VIRTUAL_COPY_CONS (Translator);
  26
  27 protected:
  28   virtual void do_pre_move_processing ();
  29   virtual void acknowledge_element (Score_element_info i);
  30   virtual void do_process_music ();
  31   virtual bool do_try_music (Music* m);
  32
  33 private:
  34   Array<Musical_pitch> pitch_arr_;
  35   Item* chord_name_p_;
  36   Tonic_req* tonic_req_;
  37   Inversion_req* inversion_req_;
  38   Bass_req* bass_req_;
  39 };
  40
  41 ADD_THIS_TRANSLATOR (Chord_name_engraver);
  42
  43 Chord_name_engraver::Chord_name_engraver ()
  44 {
  45   chord_name_p_ = 0;
  46   tonic_req_ = 0;
  47   inversion_req_ = 0;
  48   bass_req_ = 0;
  49 }
  50
  51 void
  52 Chord_name_engraver::acknowledge_element (Score_element_info i)
  53 {
  54   if (Note_req* n = dynamic_cast<Note_req*> (i.req_l_))
  55     pitch_arr_.push (n->pitch_);
  56 }
  57
  58 bool
  59 Chord_name_engraver::do_try_music (Music* m)
  60 {
  61   if (Note_req* n = dynamic_cast<Note_req*> (m))
  62     {
  63       pitch_arr_.push (n->pitch_);
  64       return true;
  65     }
  66   if (Tonic_req* t = dynamic_cast<Tonic_req*> (m))
  67     {
  68       tonic_req_ = t;
  69       return true;
  70     }
  71   if (Inversion_req* i = dynamic_cast<Inversion_req*> (m))
  72     {
  73       inversion_req_ = i;
  74       return true;
  75     }
  76   if (Bass_req* b = dynamic_cast<Bass_req*> (m))
  77     {
  78       bass_req_ = b;
  79       return true;
  80     }
  81   return false;
  82 }
  83
  84 void
  85 Chord_name_engraver::do_process_music ()
  86 {
  87   if (chord_name_p_)
  88     return;
  89   if (!pitch_arr_.size ())
  90     return;
  91
  92   bool find_inversion_b = false;
  93   SCM chord_inversion = get_property ("chordInversion");
  94   if (gh_boolean_p (chord_inversion))
  95     find_inversion_b = gh_scm2bool (chord_inversion);
  96
  97   chord_name_p_ = new Item (get_property ("basicChordNameProperties"));
  98   Chord chord = to_chord (pitch_arr_, tonic_req_, inversion_req_, bass_req_,
  99                           find_inversion_b);
 100
 101   /*
 102     Hmm, why not represent complete chord as list?
 103     ((tonic third fifth) (inversion bass))
 104   */
 105   SCM plist = SCM_EOL;
 106   for (int i= chord.pitch_arr_.size (); i--; )
 107     plist = gh_cons (chord.pitch_arr_[i].to_scm (), plist);
 108
 109   chord_name_p_->set_elt_property ("pitches", plist);
 110   if (chord.inversion_b_)
 111     chord_name_p_->set_elt_property ("inversion",
 112                                      chord.inversion_pitch_.to_scm ());
 113   if (chord.bass_b_)
 114     chord_name_p_->set_elt_property ("bass", chord.bass_pitch_.to_scm ());
 115
 116   announce_element (Score_element_info (chord_name_p_, 0));
 117 }
 118
 119 void
 120 Chord_name_engraver::do_pre_move_processing ()
 121 {
 122   if (chord_name_p_)
 123     {
 124       typeset_element (chord_name_p_);
 125     }
 126   pitch_arr_.clear ();
 127   chord_name_p_ = 0;
 128   tonic_req_ = 0;
 129   inversion_req_ = 0;
 130   bass_req_ = 0;
 131 }
 132