lily/note-heads-engraver.cc

   1 /*
   2   head-grav.cc -- part of GNU LilyPond
   3
   4   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   5 */
   6 #include <ctype.h>
   7
   8 #include "rhythmic-head.hh"
   9 #include "paper-def.hh"
  10 #include "event.hh"
  11 #include "dots.hh"
  12 #include "dot-column.hh"
  13 #include "staff-symbol-referencer.hh"
  14 #include "item.hh"
  15 #include "engraver.hh"
  16 #include "warn.hh"
  17
  18 /**
  19   make balls and rests
  20  */
  21
  22 class Note_heads_engraver : public Engraver
  23 {
  24   Link_array<Item> notes_;
  25
  26   Link_array<Item> dots_;
  27   Link_array<Music> note_reqs_;
  28
  29 public:
  30   TRANSLATOR_DECLARATIONS(Note_heads_engraver);
  31
  32 protected:
  33   virtual void start_translation_timestep ();
  34   virtual bool try_music (Music *req) ;
  35   virtual void process_music ();
  36
  37   virtual void stop_translation_timestep ();
  38 };
  39
  40 Note_heads_engraver::Note_heads_engraver()
  41 {
  42 }
  43
  44 bool
  45 Note_heads_engraver::try_music (Music *m)
  46 {
  47   if (m->is_mus_type ("note-event"))
  48     {
  49       note_reqs_.push (m);
  50       return true;
  51     }
  52   else if (m->is_mus_type ("busy-playing-event"))
  53     return note_reqs_.size ();
  54
  55   return false;
  56 }
  57
  58
  59 void
  60 Note_heads_engraver::process_music ()
  61 {
  62   for (int i=0; i < note_reqs_.size (); i++)
  63     {
  64       Item *note = new Item (get_property ("NoteHead"));
  65
  66       Music * req = note_reqs_[i];
  67
  68       Duration dur = *unsmob_duration (req->get_mus_property ("duration"));
  69
  70       note->set_grob_property ("duration-log", gh_int2scm (dur.duration_log ()));
  71
  72       if (dur.dot_count ())
  73         {
  74           Item * d = new Item (get_property ("Dots"));
  75           Rhythmic_head::set_dots (note, d);
  76
  77           if (dur.dot_count ()
  78               != gh_scm2int (d->get_grob_property ("dot-count")))
  79             d->set_grob_property ("dot-count", gh_int2scm (dur.dot_count ()));
  80
  81           d->set_parent (note, Y_AXIS);
  82           announce_grob (d, SCM_EOL);
  83           dots_.push (d);
  84         }
  85
  86       Pitch *pit =unsmob_pitch (req->get_mus_property ("pitch"));
  87
  88       int pos = pit->steps ();
  89       SCM c0 = get_property ("centralCPosition");
  90       if (gh_number_p (c0))
  91         pos += gh_scm2int (c0);
  92
  93       note->set_grob_property ("staff-position",   gh_int2scm (pos));
  94       announce_grob (note,req->self_scm());
  95       notes_.push (note);
  96     }
  97 }
  98
  99 void
 100 Note_heads_engraver::stop_translation_timestep ()
 101 {
 102   for (int i=0; i < notes_.size (); i++)
 103     {
 104       typeset_grob (notes_[i]);
 105     }
 106
 107   notes_.clear ();
 108   for (int i=0; i < dots_.size (); i++)
 109     {
 110       typeset_grob (dots_[i]);
 111     }
 112   dots_.clear ();
 113   note_reqs_.clear ();
 114 }
 115
 116 void
 117 Note_heads_engraver::start_translation_timestep ()
 118 {
 119 }
 120
 121
 122 ENTER_DESCRIPTION(Note_heads_engraver,
 123 /* descr */       "Generate noteheads.",
 124 /* creats*/       "NoteHead Dots",
 125 /* accepts */     "note-event busy-playing-event ligature-event abort-event",
 126 /* acks  */      "",
 127 /* reads */       "centralCPosition",
 128 /* write */       "");