lily/drum-note-engraver.cc

   1 /*
   2   drum-note-engraver.cc
   3
   4   (c) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5 */
   6
   7 #include <cctype>
   8 using namespace std;
   9
  10 #include "item.hh"
  11 #include "duration.hh"
  12 #include "engraver.hh"
  13 #include "note-column.hh"
  14 #include "rhythmic-head.hh"
  15 #include "side-position-interface.hh"
  16 #include "script-interface.hh"
  17 #include "stem.hh"
  18 #include "stream-event.hh"
  19 #include "warn.hh"
  20
  21 #include "translator.icc"
  22
  23 class Drum_notes_engraver : public Engraver
  24 {
  25   vector<Item*> notes_;
  26   vector<Item*> scripts_;
  27   vector<Stream_event*> events_;
  28
  29 public:
  30   TRANSLATOR_DECLARATIONS (Drum_notes_engraver);
  31
  32 protected:
  33   void process_music ();
  34   DECLARE_ACKNOWLEDGER (stem);
  35   DECLARE_ACKNOWLEDGER (note_column);
  36   DECLARE_TRANSLATOR_LISTENER (note);
  37   void stop_translation_timestep ();
  38 };
  39
  40 Drum_notes_engraver::Drum_notes_engraver ()
  41 {
  42 }
  43
  44 IMPLEMENT_TRANSLATOR_LISTENER (Drum_notes_engraver, note);
  45 void
  46 Drum_notes_engraver::listen_note (Stream_event *ev)
  47 {
  48   events_.push_back (ev);
  49 }
  50
  51 void
  52 Drum_notes_engraver::process_music ()
  53 {
  54   SCM tab = 0;
  55   for (vsize i = 0; i < events_.size (); i++)
  56     {
  57       if (!tab)
  58         tab = get_property ("drumStyleTable");
  59
  60       Stream_event *ev = events_[i];
  61       Item *note = make_item ("NoteHead", ev->self_scm ());
  62
  63       SCM drum_type = ev->get_property ("drum-type");
  64
  65       SCM defn = SCM_EOL;
  66
  67       if (scm_hash_table_p (tab) == SCM_BOOL_T)
  68         defn = scm_hashq_ref (tab, drum_type, SCM_EOL);
  69
  70       if (scm_is_pair (defn))
  71         {
  72           SCM pos = scm_caddr (defn);
  73           SCM style = scm_car (defn);
  74           SCM script = scm_cadr (defn);
  75
  76           if (scm_integer_p (pos) == SCM_BOOL_T)
  77             note->set_property ("staff-position", pos);
  78           if (scm_is_symbol (style))
  79             note->set_property ("style", style);
  80
  81           if (scm_is_string (script))
  82             {
  83               Item *p = make_item ("Script", ev->self_scm ());
  84               make_script_from_event (p, context (), script,
  85                                       0);
  86
  87               p->set_parent (note, Y_AXIS);
  88               Side_position_interface::add_support (p, note);
  89               scripts_.push_back (p);
  90             }
  91         }
  92
  93       notes_.push_back (note);
  94     }
  95 }
  96
  97 void
  98 Drum_notes_engraver::acknowledge_stem (Grob_info inf)
  99 {
 100   for (vsize i = 0; i < scripts_.size (); i++)
 101     {
 102       Grob *e = scripts_[i];
 103
 104       if (to_dir (e->get_property ("side-relative-direction")))
 105         e->set_object ("direction-source", inf.grob ()->self_scm ());
 106
 107       Side_position_interface::add_support (e, inf.grob ());
 108     }
 109 }
 110
 111 void
 112 Drum_notes_engraver::acknowledge_note_column (Grob_info inf)
 113 {
 114   for (vsize i = 0; i < scripts_.size (); i++)
 115     {
 116       Grob *e = scripts_[i];
 117
 118       if (!e->get_parent (X_AXIS)
 119           && Side_position_interface::get_axis (e) == Y_AXIS)
 120         e->set_parent (inf.grob (), X_AXIS);
 121     }
 122 }
 123
 124 void
 125 Drum_notes_engraver::stop_translation_timestep ()
 126 {
 127   notes_.clear ();
 128   scripts_.clear ();
 129
 130   events_.clear ();
 131 }
 132
 133 ADD_ACKNOWLEDGER (Drum_notes_engraver, stem);
 134 ADD_ACKNOWLEDGER (Drum_notes_engraver, note_column);
 135
 136
 137 ADD_TRANSLATOR (Drum_notes_engraver,
 138                 /* doc */
 139                 "Generate drum note heads.",
 140
 141                 /* create */
 142                 "NoteHead "
 143                 "Script ",
 144
 145                 /* read */
 146                 "drumStyleTable ",
 147
 148                 /* write */
 149                 ""
 150                 );
 151