lily/drum-note-engraver.cc

   1 /*
   2   drum-note-engraver.cc
   3
   4   (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   5 */
   6 #include <ctype.h>
   7
   8 #include "rhythmic-head.hh"
   9 #include "event.hh"
  10 #include "item.hh"
  11 #include "engraver.hh"
  12 #include "warn.hh"
  13 #include "side-position-interface.hh"
  14 #include "script.hh"
  15 #include "stem.hh"
  16 #include "note-column.hh"
  17
  18 class Drum_notes_engraver : public Engraver
  19 {
  20   Link_array<Item> notes_;
  21   Link_array<Item> dots_;
  22   Link_array<Item> scripts_;
  23   Link_array<Music> events_;
  24
  25 public:
  26   TRANSLATOR_DECLARATIONS (Drum_notes_engraver);
  27
  28 protected:
  29   virtual bool try_music (Music *ev) ;
  30   virtual void process_music ();
  31   virtual void acknowledge_grob (Grob_info);
  32   virtual void stop_translation_timestep ();
  33 };
  34
  35 Drum_notes_engraver::Drum_notes_engraver ()
  36 {
  37 }
  38
  39 bool
  40 Drum_notes_engraver::try_music (Music *m)
  41 {
  42   if (m->is_mus_type ("note-event"))
  43     {
  44       events_.push (m);
  45       return true;
  46     }
  47   else if (m->is_mus_type ("busy-playing-event"))
  48     return events_.size ();
  49   else if (m->is_mus_type ("start-playing-event"))
  50     return events_.size ();
  51
  52   return false;
  53 }
  54
  55
  56 void
  57 Drum_notes_engraver::process_music ()
  58 {
  59   SCM tab = 0;
  60   for (int i=0; i < events_.size (); i++)
  61     {
  62       if (!tab)
  63         tab = get_property ("drumStyleTable");
  64
  65       Item *note = make_item ("NoteHead");
  66       Music * ev = events_[i];
  67
  68       Duration dur = *unsmob_duration (ev->get_property ("duration"));
  69
  70       note->set_property ("duration-log", scm_int2num (dur.duration_log ()));
  71
  72       if (dur.dot_count ())
  73         {
  74           Item * d = make_item ("Dots");
  75           Rhythmic_head::set_dots (note, d);
  76
  77           if (dur.dot_count ()
  78               != robust_scm2int (d->get_property ("dot-count"), 0))
  79             d->set_property ("dot-count", scm_int2num (dur.dot_count ()));
  80
  81           d->set_parent (note, Y_AXIS);
  82           announce_grob (d, SCM_EOL);
  83           dots_.push (d);
  84         }
  85
  86       SCM drum_type =  ev->get_property ("drum-type");
  87
  88       SCM defn = SCM_EOL;
  89
  90       if (scm_hash_table_p (tab) == SCM_BOOL_T)
  91         defn = scm_hashq_ref (tab, drum_type, SCM_EOL);
  92
  93       if (ly_pair_p (defn))
  94         {
  95           SCM pos = ly_caddr (defn);
  96           SCM style =ly_car (defn);
  97           SCM script = ly_cadr (defn);
  98
  99           if (scm_integer_p (pos) == SCM_BOOL_T)
 100             note->set_property ("staff-position", pos);
 101           if (ly_symbol_p (style))
 102             note->set_property ("style", style);
 103
 104           if (ly_string_p (script))
 105             {
 106               Item *p  = make_item ("Script");
 107               SCM desc  = SCM_EOL;
 108               make_script_from_event (p, &desc,
 109                                       daddy_context_, script,
 110                                       0);
 111
 112               if (p->get_property ("follow-into-staff"))
 113                 p->set_property ("staff-padding", SCM_EOL);
 114
 115               announce_grob (p, ev->self_scm ());
 116
 117               p->set_parent (note, Y_AXIS);
 118               Side_position_interface::add_support (p, note);
 119               scripts_.push (p);
 120             }
 121         }
 122
 123
 124
 125       announce_grob (note,ev->self_scm ());
 126       notes_.push (note);
 127     }
 128 }
 129
 130 void
 131 Drum_notes_engraver::acknowledge_grob (Grob_info inf)
 132 {
 133   if (Stem::has_interface (inf.grob_))
 134     {
 135       for (int i=0; i < scripts_.size (); i++)
 136         {
 137           Grob*e = scripts_[i];
 138
 139           if (to_dir (e->get_property ("side-relative-direction")))
 140             e->set_property ("direction-source", inf.grob_->self_scm ());
 141
 142           /*
 143             add dep ?
 144            */
 145           e->add_dependency (inf.grob_);
 146           Side_position_interface::add_support (e, inf.grob_);
 147         }
 148     }
 149    else if (Note_column::has_interface (inf.grob_))
 150     {
 151       for (int i=0; i < scripts_.size (); i++)
 152         {
 153           Grob *e = scripts_[i];
 154
 155           if (!e->get_parent (X_AXIS) &&
 156               Side_position_interface::get_axis (e) == Y_AXIS)
 157             {
 158               e->set_parent (inf.grob_, X_AXIS);
 159             }
 160         }
 161     }
 162
 163 }
 164
 165
 166 void
 167 Drum_notes_engraver::stop_translation_timestep ()
 168 {
 169   for (int i=0; i < notes_.size (); i++)
 170     {
 171       typeset_grob (notes_[i]);
 172     }
 173   notes_.clear ();
 174   for (int i=0; i < dots_.size (); i++)
 175     {
 176       typeset_grob (dots_[i]);
 177     }
 178   dots_.clear ();
 179   for (int i=0; i < scripts_.size (); i++)
 180     {
 181       typeset_grob (scripts_[i]);
 182     }
 183   scripts_.clear ();
 184
 185   events_.clear ();
 186 }
 187
 188
 189
 190 ENTER_DESCRIPTION (Drum_notes_engraver,
 191 /* descr */       "Generate noteheads.",
 192 /* creats*/       "NoteHead Dots Script",
 193 /* accepts */     "note-event busy-playing-event",
 194 /* acks  */       "stem-interface note-column-interface",
 195 /* reads */       "drumStyleTable",
 196 /* write */       "");
 197