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 "font-interface.hh"
  15 #include "paper-def.hh"
  16 #include "main.hh"
  17 #include "dimensions.hh"
  18 #include "item.hh"
  19 #include "pitch.hh"
  20 #include "protected-scm.hh"
  21
  22 class Chord_name_engraver : public Engraver
  23 {
  24 public:
  25   Chord_name_engraver ();
  26   VIRTUAL_COPY_CONS (Translator);
  27
  28 protected:
  29   virtual void do_pre_move_processing ();
  30   virtual void acknowledge_element (Score_element_info i);
  31   virtual void do_process_music ();
  32   virtual bool do_try_music (Music* m);
  33
  34 private:
  35   void create_chord_name ();
  36
  37   Item* chord_name_p_;
  38   Protected_scm pitches_;
  39
  40   Protected_scm chord_;
  41   Protected_scm last_chord_;
  42
  43   Protected_scm tonic_req_;
  44   Protected_scm inversion_req_;
  45   Protected_scm bass_req_;
  46 };
  47
  48 ADD_THIS_TRANSLATOR (Chord_name_engraver);
  49
  50 Chord_name_engraver::Chord_name_engraver ()
  51 {
  52   chord_name_p_ = 0;
  53   pitches_ = SCM_EOL;
  54   tonic_req_ = SCM_EOL;
  55   inversion_req_ = SCM_EOL;
  56   bass_req_ = SCM_EOL;
  57   chord_ = SCM_EOL;
  58   last_chord_ = SCM_EOL;
  59 }
  60
  61 void
  62 Chord_name_engraver::acknowledge_element (Score_element_info i)
  63 {
  64   if (Note_req* n = dynamic_cast<Note_req*> (i.req_l_))
  65     pitches_ = gh_cons (n->get_mus_property ("pitch"), pitches_);
  66 }
  67
  68 bool
  69 Chord_name_engraver::do_try_music (Music* m)
  70 {
  71   if (Note_req* n = dynamic_cast<Note_req*> (m))
  72     {
  73       pitches_ = gh_cons (n->get_mus_property ("pitch"), pitches_);
  74       return true;
  75     }
  76   if (Tonic_req* t = dynamic_cast<Tonic_req*> (m))
  77     {
  78       tonic_req_ = t->get_mus_property ("pitch");
  79       return true;
  80     }
  81   if (Inversion_req* i = dynamic_cast<Inversion_req*> (m))
  82     {
  83       inversion_req_ = i->get_mus_property ("pitch");
  84       return true;
  85     }
  86   if (Bass_req* b = dynamic_cast<Bass_req*> (m))
  87     {
  88       bass_req_ = b->get_mus_property ("pitch");
  89       return true;
  90     }
  91   return false;
  92 }
  93
  94 void
  95 Chord_name_engraver::do_process_music ()
  96 {
  97   if (!chord_name_p_ && pitches_ != SCM_EOL)
  98     {
  99       bool find_inversion_b = false;
 100       SCM chord_inversion = get_property ("chordInversion");
 101       if (gh_boolean_p (chord_inversion))
 102         find_inversion_b = gh_scm2bool (chord_inversion);
 103
 104       chord_ = Chord::pitches_and_requests_to_chord (pitches_,
 105                                                      tonic_req_,
 106                                                      inversion_req_,
 107                                                      bass_req_,
 108                                                      find_inversion_b);
 109
 110       create_chord_name ();
 111       announce_element (chord_name_p_, 0);
 112       SCM s = get_property ("drarnChords"); //FIXME!
 113       if (to_boolean (s) && last_chord_ != SCM_EOL &&
 114           gh_equal_p (chord_, last_chord_))
 115         chord_name_p_->set_elt_property ("begin-of-line-visible", SCM_BOOL_T);
 116     }
 117 }
 118
 119 void
 120 Chord_name_engraver::create_chord_name ()
 121 {
 122   chord_name_p_ = new Item (get_property ("ChordName"));
 123
 124   SCM pitches = gh_car (chord_);
 125   SCM modifiers = gh_cdr (chord_);
 126   SCM inversion = gh_car (modifiers);
 127   SCM bass = gh_cdr (modifiers);
 128   /* Hmm, maybe chord-name should use (pitches (inversion . base)) too? */
 129   chord_name_p_->set_elt_property ("pitches", pitches);
 130   chord_name_p_->set_elt_property ("inversion", inversion);
 131   chord_name_p_->set_elt_property ("inversion", bass);
 132 }
 133
 134 void
 135 Chord_name_engraver::do_pre_move_processing ()
 136 {
 137   if (chord_name_p_)
 138     {
 139       typeset_element (chord_name_p_);
 140     }
 141   chord_name_p_ = 0;
 142
 143   pitches_ = SCM_EOL;
 144   tonic_req_ = SCM_EOL;
 145   inversion_req_ = SCM_EOL;
 146   bass_req_ = SCM_EOL;
 147   last_chord_ = chord_;
 148   chord_ = SCM_EOL;
 149 }
 150