lily/drum-note-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include <cctype>
  21 using namespace std;
  22
  23 #include "item.hh"
  24 #include "duration.hh"
  25 #include "engraver.hh"
  26 #include "note-column.hh"
  27 #include "rhythmic-head.hh"
  28 #include "side-position-interface.hh"
  29 #include "script-interface.hh"
  30 #include "stem.hh"
  31 #include "stream-event.hh"
  32 #include "warn.hh"
  33
  34 #include "translator.icc"
  35
  36 class Drum_notes_engraver : public Engraver
  37 {
  38   vector<Item *> scripts_;
  39   vector<Stream_event *> events_;
  40
  41 public:
  42   TRANSLATOR_DECLARATIONS (Drum_notes_engraver);
  43
  44 protected:
  45   void process_music ();
  46   DECLARE_ACKNOWLEDGER (stem);
  47   DECLARE_ACKNOWLEDGER (note_column);
  48   DECLARE_TRANSLATOR_LISTENER (note);
  49   void stop_translation_timestep ();
  50 };
  51
  52 Drum_notes_engraver::Drum_notes_engraver ()
  53 {
  54 }
  55
  56 IMPLEMENT_TRANSLATOR_LISTENER (Drum_notes_engraver, note);
  57 void
  58 Drum_notes_engraver::listen_note (Stream_event *ev)
  59 {
  60   events_.push_back (ev);
  61 }
  62
  63 void
  64 Drum_notes_engraver::process_music ()
  65 {
  66   SCM tab = 0;
  67   for (vsize i = 0; i < events_.size (); i++)
  68     {
  69       if (!tab)
  70         tab = get_property ("drumStyleTable");
  71
  72       Stream_event *ev = events_[i];
  73       Item *note = make_item ("NoteHead", ev->self_scm ());
  74
  75       SCM drum_type = ev->get_property ("drum-type");
  76
  77       SCM defn = SCM_EOL;
  78
  79       if (scm_hash_table_p (tab) == SCM_BOOL_T)
  80         defn = scm_hashq_ref (tab, drum_type, SCM_EOL);
  81
  82       if (scm_is_pair (defn))
  83         {
  84           SCM pos = scm_caddr (defn);
  85           SCM style = scm_car (defn);
  86           SCM script = scm_cadr (defn);
  87
  88           if (scm_integer_p (pos) == SCM_BOOL_T)
  89             note->set_property ("staff-position", pos);
  90           if (scm_is_symbol (style))
  91             note->set_property ("style", style);
  92
  93           if (scm_is_string (script))
  94             {
  95               Item *p = make_item ("Script", ev->self_scm ());
  96               make_script_from_event (p, context (), script,
  97                                       0);
  98
  99               p->set_parent (note, Y_AXIS);
 100               Side_position_interface::add_support (p, note);
 101               scripts_.push_back (p);
 102             }
 103         }
 104     }
 105 }
 106
 107 void
 108 Drum_notes_engraver::acknowledge_stem (Grob_info inf)
 109 {
 110   for (vsize i = 0; i < scripts_.size (); i++)
 111     {
 112       Grob *e = scripts_[i];
 113
 114       if (to_dir (e->get_property ("side-relative-direction")))
 115         e->set_object ("direction-source", inf.grob ()->self_scm ());
 116
 117       Side_position_interface::add_support (e, inf.grob ());
 118     }
 119 }
 120
 121 void
 122 Drum_notes_engraver::acknowledge_note_column (Grob_info inf)
 123 {
 124   for (vsize i = 0; i < scripts_.size (); i++)
 125     {
 126       Grob *e = scripts_[i];
 127
 128       if (!e->get_parent (X_AXIS)
 129           && Side_position_interface::get_axis (e) == Y_AXIS)
 130         e->set_parent (inf.grob (), X_AXIS);
 131     }
 132 }
 133
 134 void
 135 Drum_notes_engraver::stop_translation_timestep ()
 136 {
 137   scripts_.clear ();
 138   events_.clear ();
 139 }
 140
 141 ADD_ACKNOWLEDGER (Drum_notes_engraver, stem);
 142 ADD_ACKNOWLEDGER (Drum_notes_engraver, note_column);
 143
 144 ADD_TRANSLATOR (Drum_notes_engraver,
 145                 /* doc */
 146                 "Generate drum note heads.",
 147
 148                 /* create */
 149                 "NoteHead "
 150                 "Script ",
 151
 152                 /* read */
 153                 "drumStyleTable ",
 154
 155                 /* write */
 156                 ""
 157                 );