lily/score-engraver.cc

   1 /*
   2   score-engraver.cc -- implement Score_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "all-font-metrics.hh"
  10 #include "afm.hh"
  11 #include "warn.hh"
  12 #include "main.hh"
  13 #include "system.hh"
  14 #include "item.hh"
  15 #include "score-engraver.hh"
  16 #include "paper-score.hh"
  17 #include "paper-column.hh"
  18 #include "command-request.hh"
  19 #include "paper-def.hh"
  20 #include "axis-group-interface.hh"
  21 #include "translator-def.hh"
  22
  23 #include "staff-spacing.hh"
  24 #include "note-spacing.hh"
  25
  26 /*
  27   TODO: the column creation logic is rather hairy. Revise it.
  28  */
  29 Score_engraver::Score_engraver ()
  30 {
  31   system_ =0;
  32   command_column_ =0;
  33   musical_column_ =0;
  34   breaks_ =0;
  35   pscore_ = 0;
  36 }
  37
  38 void
  39 Score_engraver::make_columns ()
  40 {
  41   /*
  42     ugh.
  43    */
  44   if (!command_column_)
  45     {
  46       set_columns (new Paper_column (get_property ("NonMusicalPaperColumn")),
  47                    new Paper_column (get_property ("PaperColumn")));
  48
  49       command_column_->set_grob_property ("breakable", SCM_BOOL_T);
  50
  51
  52       Grob_info i1 (command_column_);
  53       i1.origin_trans_ = this;
  54
  55       Grob_info i2 (musical_column_);
  56       i2.origin_trans_ = this;
  57
  58
  59       announce_grob (i1);
  60       announce_grob (i2);
  61
  62
  63     }
  64 }
  65
  66 void
  67 Score_engraver::prepare (Moment w)
  68 {
  69   Global_translator::prepare (w);
  70
  71   /*
  72     TODO: don't make columns when skipTypesetting is true.
  73    */
  74   make_columns ();
  75
  76   command_column_->set_grob_property ("when", now_mom_.smobbed_copy ());
  77   musical_column_->set_grob_property ("when", now_mom_.smobbed_copy ());
  78
  79
  80   Translator_group::start_translation_timestep();
  81 }
  82
  83 void
  84 Score_engraver::finish ()
  85 {
  86   if ((breaks_%8))
  87     progress_indication ("[" + to_string (breaks_) + "]");
  88
  89   check_removal ();
  90   removal_processing ();
  91
  92 }
  93
  94 /*
  95   use start/finish?
  96  */
  97 void
  98 Score_engraver::initialize ()
  99 {
 100   Font_metric *fm = all_fonts_global->find_afm("feta20");
 101   if (!fm)
 102     error (_f ("can't find `%s'", "feta20.afm")
 103            + "\n" +_ ("Fonts have not been installed properly.  Aborting"));
 104
 105   unsmob_translator_def (definition_)->apply_property_operations (this);
 106
 107   assert (dynamic_cast<Paper_def *> (output_def_));
 108   assert (!daddy_trans_);
 109   pscore_ = new Paper_score;
 110   pscore_->paper_ = dynamic_cast<Paper_def*> (output_def_);
 111
 112   SCM props = get_property ("System");
 113
 114   pscore_->typeset_line (new System (props));
 115
 116   make_columns ();
 117   system_ = pscore_->system_;
 118   system_->set_bound (LEFT, command_column_);
 119   command_column_->set_grob_property ("breakable", SCM_BOOL_T);
 120
 121   Engraver_group_engraver::initialize ();
 122 }
 123
 124
 125 void
 126 Score_engraver::finalize ()
 127 {
 128   Engraver_group_engraver::finalize ();
 129
 130   Grob * cc
 131     = unsmob_grob (get_property ("currentCommandColumn"));
 132   system_->set_bound (RIGHT, cc);
 133   cc->set_grob_property ("breakable", SCM_BOOL_T);
 134
 135   typeset_all ();
 136 }
 137
 138 void
 139 Score_engraver::one_time_step ()
 140 {
 141   if (!to_boolean (get_property ("skipTypesetting")))
 142     {
 143       process_music ();
 144       do_announces ();
 145     }
 146
 147   stop_translation_timestep ();
 148   check_removal ();
 149
 150
 151   for (int i = announce_infos_.size(); i--;)
 152     {
 153       Grob *g = announce_infos_[i].grob_;
 154       if (!dynamic_cast<Paper_column*> (g)) // ugh.
 155         {
 156
 157           String msg= "Grob "
 158             + g->name()
 159             + " was created too late!";
 160           g->programming_error (msg);
 161         }
 162     }
 163   announce_infos_.clear ();
 164 }
 165
 166 void
 167 Score_engraver::announce_grob (Grob_info info)
 168 {
 169   announce_infos_.push (info);
 170   pscore_->system_->typeset_grob (info.grob_);
 171 }
 172
 173 void
 174 Score_engraver::typeset_grob (Grob *elem)
 175 {
 176   if (!elem)
 177     programming_error ("Score_engraver: empty elt\n");
 178   else
 179
 180     elems_.push (elem);
 181 }
 182
 183 void
 184 Score_engraver::typeset_all ()
 185 {
 186   for (int i =0; i < elems_.size (); i++)
 187     {
 188       Grob * elem = elems_[i];
 189
 190       if (Spanner *s = dynamic_cast <Spanner *> (elem))
 191         {
 192           /*
 193             do something sensible if spanner not
 194             spanned on 2 items.
 195           */
 196           Direction d = LEFT;
 197           do {
 198             if (!s->get_bound (d))
 199               {
 200                 s->set_bound (d, command_column_);
 201                 /* don't warn for empty/suicided spanners,
 202                    it makes real warningsinvisible.
 203                    maybe should be junked earlier? */
 204                 if (!elem->live())
 205                   ; // gdb hook
 206                 else
 207                   elem->warning (_f ("unbound spanner `%s'", s->name ().to_str0 ()));
 208               }
 209           }
 210           while (flip (&d) != LEFT);
 211
 212           if (dynamic_cast<Item*> (s->get_parent (Y_AXIS)))
 213             programming_error ("Spanner Y-parent is an item.");
 214         }
 215       else
 216         {
 217           if (!elem->get_parent (X_AXIS))
 218             {
 219               bool br = to_boolean (elem->get_grob_property ("breakable"));
 220               Axis_group_interface::add_element (br ? command_column_ : musical_column_, elem);
 221
 222             }
 223         }
 224       if (!elem->get_parent (Y_AXIS))
 225         Axis_group_interface::add_element (system_, elem);
 226     }
 227   elems_.clear ();
 228 }
 229
 230 void
 231 Score_engraver::stop_translation_timestep ()
 232 {
 233   // this generates all items.
 234   Engraver_group_engraver::stop_translation_timestep ();
 235
 236   typeset_all ();
 237   if (to_boolean (command_column_->get_grob_property ("breakable")))
 238     {
 239       breaks_ ++;
 240       if (! (breaks_%8))
 241         progress_indication ("[" + to_string (breaks_) + "]");
 242     }
 243
 244
 245   system_->add_column (command_column_);
 246   system_->add_column (musical_column_);
 247
 248   command_column_ = 0;
 249   musical_column_ = 0;
 250 }
 251
 252 void
 253 Score_engraver::set_columns (Paper_column *new_command,
 254                              Paper_column *new_musical)
 255 {
 256   assert (!command_column_ && !musical_column_);
 257
 258   command_column_ = new_command;
 259   musical_column_ = new_musical;
 260   if (new_command)
 261     {
 262       set_property ("currentCommandColumn", new_command->self_scm ());
 263     }
 264
 265   if (new_musical)
 266     {
 267       set_property ("currentMusicalColumn", new_musical->self_scm ());
 268     }
 269 }
 270
 271 Music_output*
 272 Score_engraver::get_output ()
 273 {
 274   Music_output * o = pscore_;
 275   pscore_=0;
 276   return o;
 277 }
 278
 279 bool
 280 Score_engraver::try_music (Music*r)
 281 {
 282   bool gotcha = Engraver_group_engraver::try_music (r);
 283
 284   if (!gotcha)
 285     {
 286       if (Break_req* b = dynamic_cast<Break_req *> (r))
 287         {
 288           gotcha = true;
 289
 290
 291           SCM pen = command_column_->get_grob_property ("penalty");
 292           Real total_penalty = gh_number_p (pen)
 293             ? gh_scm2double (pen)
 294             : 0.0;
 295
 296           SCM rpen = b->get_mus_property ("penalty");
 297           if (gh_number_p (rpen))
 298             total_penalty +=  gh_scm2double (rpen);
 299
 300           if (total_penalty > 10000.0) //  ugh. arbitrary.
 301             forbid_breaks ();
 302
 303           command_column_->set_grob_property ("penalty",
 304                                                gh_double2scm (total_penalty));
 305         }
 306     }
 307    return gotcha;
 308 }
 309
 310 /*
 311   TODO:  use property Score.breakForbidden = #t
 312  */
 313 void
 314 Score_engraver::forbid_breaks ()
 315 {
 316   /*
 317     result is junked.
 318    */
 319   if (command_column_)
 320     command_column_->set_grob_property ("breakable", SCM_EOL);
 321 }
 322
 323 void
 324 Score_engraver::acknowledge_grob (Grob_info gi)
 325 {
 326   if (Staff_spacing::has_interface (gi.grob_))
 327     {
 328       Pointer_group_interface::add_grob (command_column_,
 329                                          ly_symbol2scm ("spacing-wishes"),
 330                                          gi.grob_);
 331     }
 332   if (Note_spacing::has_interface (gi.grob_))
 333     {
 334       Pointer_group_interface::add_grob (musical_column_,
 335                                          ly_symbol2scm ("spacing-wishes"),
 336                                          gi.grob_);
 337     }
 338 }
 339
 340
 341
 342 ENTER_DESCRIPTION(Score_engraver,
 343 /* descr */       "Top level engraver. Takes care of generating columns and the complete  system (ie. System)
 344
 345
 346 This engraver decides whether a column is breakable. The default is
 347 that a column is always breakable. However, when every Bar_engraver
 348 that does not have a barline at a certain point will call
 349 Score_engraver::forbid_breaks to stop linebreaks.  In practice, this
 350 means that you can make a breakpoint by creating a barline (assuming
 351 that there are no beams or notes that prevent a breakpoint.)
 352
 353
 354 ",
 355 /* creats*/       "System PaperColumn NonMusicalPaperColumn",
 356 /* acks  */       "note-spacing-interface staff-spacing-interface",
 357 /* reads */       "currentMusicalColumn currentCommandColumn",
 358 /* write */       "");