lily/note-heads-engraver.cc

   1 /*
   2   head-grav.cc -- part of GNU LilyPond
   3
   4   (c)  1997--2001 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 "musical-request.hh"
  11 #include "dots.hh"
  12 #include "dot-column.hh"
  13 #include "staff-symbol-referencer.hh"
  14 #include "item.hh"
  15 #include "score-engraver.hh"
  16 #include "warn.hh"
  17
  18 /**
  19   make balls and rests
  20  */
  21 class Note_heads_engraver : public Engraver
  22 {
  23   Link_array<Item> note_p_arr_;
  24   Link_array<Item> dot_p_arr_;
  25   Link_array<Note_req> note_req_l_arr_;
  26   Moment note_end_mom_;
  27 public:
  28   VIRTUAL_COPY_CONS (Translator);
  29
  30 protected:
  31   virtual void start_translation_timestep ();
  32   virtual bool try_music (Music *req_l) ;
  33   virtual void process_music ();
  34
  35   virtual void stop_translation_timestep ();
  36 };
  37
  38 bool
  39 Note_heads_engraver::try_music (Music *m)
  40 {
  41   if (Note_req * n =dynamic_cast <Note_req *> (m))
  42     {
  43       note_req_l_arr_.push (n);
  44       note_end_mom_  = note_end_mom_ >? now_mom () + m->length_mom ();
  45
  46       return true;
  47     }
  48   else if (dynamic_cast<Busy_playing_req*> (m))
  49     {
  50       return now_mom () < note_end_mom_;
  51     }
  52   return false;
  53
  54 }
  55
  56
  57 void
  58 Note_heads_engraver::process_music ()
  59 {
  60   for (int i=0; i < note_req_l_arr_.size (); i++)
  61     {
  62       Item *note_p  = new Item (get_property ("NoteHead"));
  63
  64       Staff_symbol_referencer::set_interface (note_p);
  65
  66
  67
  68       Music * req = note_req_l_arr_[i];
  69
  70       Duration dur   = *unsmob_duration (req->get_mus_property ("duration"));
  71       note_p->set_grob_property ("duration-log",
  72                                 gh_int2scm (dur.duration_log () <? 2));
  73
  74       if (dur.dot_count ())
  75         {
  76           Item * d = new Item (get_property ("Dots"));
  77           Rhythmic_head::set_dots (note_p, d);
  78
  79           if (dur.dot_count ()
  80               != gh_scm2int (d->get_grob_property ("dot-count")))
  81             d->set_grob_property ("dot-count", gh_int2scm (dur.dot_count ()));
  82
  83           d->set_parent (note_p, Y_AXIS);
  84           announce_grob (d,0);
  85           dot_p_arr_.push (d);
  86         }
  87
  88       Pitch *pit =unsmob_pitch (req->get_mus_property ("pitch"));
  89
  90       int pos = pit->steps ();
  91       SCM c0 = get_property ("centralCPosition");
  92       if (gh_number_p (c0))
  93         pos += gh_scm2int (c0);
  94
  95       note_p->set_grob_property ("staff-position",   gh_int2scm (pos));
  96       if (to_boolean (get_property ("easyPlay")))
  97         {
  98           char s[2] = "a";
  99           s[0] = (pit->notename_i_ + 2)%7 + 'a';
 100
 101           s[0] = toupper (s[0]);
 102           note_p->set_grob_property ("note-character", ly_str02scm (s));
 103         }
 104
 105       announce_grob (note_p,req);
 106       note_p_arr_.push (note_p);
 107     }
 108 }
 109
 110 void
 111 Note_heads_engraver::stop_translation_timestep ()
 112 {
 113   for (int i=0; i < note_p_arr_.size (); i++)
 114     {
 115       typeset_grob (note_p_arr_[i]);
 116     }
 117   note_p_arr_.clear ();
 118   for (int i=0; i < dot_p_arr_.size (); i++)
 119     {
 120       typeset_grob (dot_p_arr_[i]);
 121     }
 122   dot_p_arr_.clear ();
 123
 124   note_req_l_arr_.clear ();
 125 }
 126
 127 void
 128 Note_heads_engraver::start_translation_timestep ()
 129 {
 130
 131   /* TODO:make this settable?
 132    */
 133   if (note_end_mom_ > now_mom ())
 134     {
 135       Score_engraver * e = 0;
 136       Translator * t  =  daddy_grav_l ();
 137       for (; !e && t;  t = t->daddy_trans_l_)
 138         {
 139           e = dynamic_cast<Score_engraver*> (t);
 140         }
 141
 142       if (!e)
 143         programming_error ("No score engraver!");
 144       else
 145         e->forbid_breaks ();    // guh. Use properties!
 146     }
 147 }
 148
 149
 150
 151 ADD_THIS_TRANSLATOR (Note_heads_engraver);
 152