lily/new-dynamic-engraver.cc

   1 /*
   2   new-dynamic-engraver.cc -- implement New_dynamic_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2008 Han-Wen Nienhuys <hanwen@lilypond.org>
   7
   8 */
   9
  10
  11 #include "engraver.hh"
  12
  13 #include "hairpin.hh"
  14 #include "international.hh"
  15 #include "item.hh"
  16 #include "note-column.hh"
  17 #include "pointer-group-interface.hh"
  18 #include "self-alignment-interface.hh"
  19 #include "spanner.hh"
  20 #include "stream-event.hh"
  21 #include "text-interface.hh"
  22
  23 #include "translator.icc"
  24
  25 class New_dynamic_engraver : public Engraver
  26 {
  27   TRANSLATOR_DECLARATIONS (New_dynamic_engraver);
  28   DECLARE_ACKNOWLEDGER (note_column);
  29   DECLARE_TRANSLATOR_LISTENER (absolute_dynamic);
  30   DECLARE_TRANSLATOR_LISTENER (span_dynamic);
  31
  32 protected:
  33   virtual void process_music ();
  34   virtual void stop_translation_timestep ();
  35 private:
  36   Drul_array<Stream_event *> accepted_spanevents_drul_;
  37   Spanner *current_spanner_;
  38   Spanner *finished_spanner_;
  39
  40   Item *script_;
  41   Stream_event *script_event_;
  42   Stream_event *current_span_event_;
  43 };
  44
  45 New_dynamic_engraver::New_dynamic_engraver ()
  46 {
  47   script_event_ = 0;
  48   current_span_event_ = 0;
  49   script_ = 0;
  50   finished_spanner_ = 0;
  51   current_spanner_ = 0;
  52   accepted_spanevents_drul_.set (0, 0);
  53 }
  54
  55 IMPLEMENT_TRANSLATOR_LISTENER (New_dynamic_engraver, absolute_dynamic);
  56 void
  57 New_dynamic_engraver::listen_absolute_dynamic (Stream_event *ev)
  58 {
  59   ASSIGN_EVENT_ONCE (script_event_, ev);
  60 }
  61
  62 IMPLEMENT_TRANSLATOR_LISTENER (New_dynamic_engraver, span_dynamic);
  63 void
  64 New_dynamic_engraver::listen_span_dynamic (Stream_event *ev)
  65 {
  66   Direction d = to_dir (ev->get_property ("span-direction"));
  67
  68   ASSIGN_EVENT_ONCE (accepted_spanevents_drul_[d], ev);
  69 }
  70
  71
  72 void
  73 New_dynamic_engraver::process_music ()
  74 {
  75   if (current_spanner_
  76       && (accepted_spanevents_drul_[STOP] || script_event_ || accepted_spanevents_drul_[START]))
  77     {
  78       Stream_event* ender = accepted_spanevents_drul_[STOP];
  79       if (!ender)
  80         ender = script_event_;
  81
  82       if (!ender)
  83         ender = accepted_spanevents_drul_[START];
  84
  85       finished_spanner_ = current_spanner_;
  86       announce_end_grob (finished_spanner_, ender->self_scm ());
  87       current_spanner_ = 0;
  88       current_span_event_ = 0;
  89     }
  90
  91   if (accepted_spanevents_drul_[START])
  92     {
  93       current_span_event_ = accepted_spanevents_drul_[START];
  94
  95       SCM start_sym = current_span_event_->get_property ("class");
  96       string start_type;
  97
  98       if (start_sym == ly_symbol2scm ("decrescendo-event"))
  99         start_type = "decrescendo";
 100       else if (start_sym == ly_symbol2scm ("crescendo-event"))
 101         start_type = "crescendo";
 102       else
 103         {
 104           programming_error ("unknown dynamic spanner type");
 105           return;
 106         }
 107
 108       SCM cresc_type = get_property ((start_type + "Spanner").c_str ());
 109
 110       if (cresc_type == ly_symbol2scm ("text"))
 111         {
 112           current_spanner_
 113             = make_spanner ("DynamicTextSpanner",
 114                             accepted_spanevents_drul_[START]->self_scm ());
 115
 116           SCM text = get_property ((start_type + "Text").c_str ());
 117           if (Text_interface::is_markup (text))
 118             {
 119               current_spanner_->set_property ("text", text);
 120             }
 121         }
 122       else
 123         {
 124           if (cresc_type != ly_symbol2scm ("hairpin"))
 125             {
 126               // Fixme: should put value in error message.
 127               string as_string = ly_scm_write_string (cresc_type);
 128               current_span_event_
 129                 ->origin()->warning (_f ("unknown crescendo style: %s\ndefaulting to hairpin.", as_string.c_str()));
 130             }
 131           current_spanner_ = make_spanner ("Hairpin",
 132                                            current_span_event_->self_scm ());
 133           if (finished_spanner_)
 134             {
 135               Pointer_group_interface::add_grob (finished_spanner_,
 136                                                  ly_symbol2scm ("adjacent-hairpins"),
 137                                                  current_spanner_);
 138
 139               Pointer_group_interface::add_grob (current_spanner_,
 140                                                  ly_symbol2scm ("adjacent-hairpins"),
 141                                                  finished_spanner_);
 142             }
 143         }
 144     }
 145
 146   if (script_event_)
 147     {
 148       script_ = make_item ("DynamicText", script_event_->self_scm ());
 149       script_->set_property ("text",
 150                              script_event_->get_property ("text"));
 151
 152       if (finished_spanner_)
 153         finished_spanner_->set_bound (RIGHT, script_);
 154       if (current_spanner_)
 155         {
 156           current_spanner_->set_bound (LEFT, script_);
 157
 158           if (!Hairpin::has_interface (current_spanner_))
 159             set_nested_property (current_spanner_,
 160                                  scm_list_3 (ly_symbol2scm ("bound-details"),
 161                                              ly_symbol2scm ("left"),
 162                                              ly_symbol2scm ("attach-dir")
 163                                              ),
 164                                  scm_from_int (RIGHT));
 165
 166         }
 167     }
 168 }
 169
 170
 171
 172 void
 173 New_dynamic_engraver::stop_translation_timestep ()
 174 {
 175   if (finished_spanner_ && !finished_spanner_->get_bound (RIGHT))
 176     finished_spanner_->set_bound (RIGHT,
 177                                   unsmob_grob (get_property ("currentMusicalColumn")));
 178
 179   if (current_spanner_ && !current_spanner_->get_bound (LEFT))
 180     current_spanner_->set_bound (LEFT,
 181                                  unsmob_grob (get_property ("currentMusicalColumn")));
 182   script_ = 0;
 183   script_event_ = 0;
 184   accepted_spanevents_drul_.set (0, 0);
 185   finished_spanner_ = 0;
 186 }
 187
 188 void
 189 New_dynamic_engraver::acknowledge_note_column (Grob_info info)
 190 {
 191   if (script_ && !script_->get_parent (X_AXIS))
 192     {
 193       extract_grob_set (info.grob (), "note-heads", heads);
 194       if (heads.size ())
 195         {
 196           Grob *head = heads[0];
 197           script_->set_parent (head, X_AXIS);
 198           Self_alignment_interface::set_center_parent (script_, X_AXIS);
 199         }
 200     }
 201
 202   if (current_spanner_ && !current_spanner_->get_bound (LEFT))
 203     current_spanner_->set_bound (LEFT, info.grob ());
 204   if (finished_spanner_ && !finished_spanner_->get_bound (RIGHT))
 205     finished_spanner_->set_bound (RIGHT, info.grob ());
 206 }
 207
 208 ADD_ACKNOWLEDGER (New_dynamic_engraver, note_column);
 209 ADD_TRANSLATOR (New_dynamic_engraver,
 210                 /* doc */
 211                 "Create hairpins, dynamic texts, and their vertical"
 212                 " alignments.  The symbols are collected onto a"
 213                 " @code{DynamicLineSpanner} grob which takes care of vertical"
 214                 " positioning.",
 215
 216                 /* create */
 217                 "DynamicTextSpanner "
 218                 "DynamicText "
 219                 "Hairpin "
 220                 "TextSpanner ",
 221
 222                 /* read */
 223                 "crescendoSpanner "
 224                 "crescendoText "
 225                 "currentMusicalColumn "
 226                 "decrescendoSpanner "
 227                 "decrescendoText ",
 228
 229                 /* write */
 230                 ""
 231                 );