lily/new-fingering-engraver.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 1998--2010 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 "engraver.hh"
  21
  22 #include "international.hh"
  23 #include "rhythmic-head.hh"
  24 #include "script-interface.hh"
  25 #include "self-alignment-interface.hh"
  26 #include "side-position-interface.hh"
  27 #include "stem.hh"
  28 #include "stream-event.hh"
  29 #include "item.hh"
  30 #include "warn.hh"
  31
  32 #include "translator.icc"
  33
  34
  35
  36 struct Finger_tuple
  37 {
  38   Grob *head_;
  39   Grob *script_;
  40   Stream_event *note_event_;
  41   Stream_event *finger_event_;
  42   bool follow_into_staff_;
  43   int position_;
  44
  45   Finger_tuple ()
  46   {
  47     position_ = 0;
  48     head_ = script_ = 0;
  49     note_event_ = finger_event_ = 0;
  50     follow_into_staff_ = false;
  51   }
  52 };
  53
  54 bool
  55 operator< (Finger_tuple const &a, Finger_tuple const &b)
  56 {
  57   return a.position_ < b.position_;
  58 }
  59
  60 class New_fingering_engraver : public Engraver
  61 {
  62   vector<Finger_tuple> fingerings_;
  63   vector<Finger_tuple> stroke_fingerings_;
  64   vector<Finger_tuple> articulations_;
  65   vector<Finger_tuple> string_numbers_;
  66
  67   vector<Grob*> heads_;
  68   Grob *stem_;
  69
  70   void position_all ();
  71 public:
  72   TRANSLATOR_DECLARATIONS (New_fingering_engraver);
  73 protected:
  74   void stop_translation_timestep ();
  75   DECLARE_ACKNOWLEDGER (rhythmic_head);
  76   DECLARE_ACKNOWLEDGER (stem);
  77   void add_fingering (Grob *, SCM,
  78                       vector<Finger_tuple> *,
  79                       Stream_event *, Stream_event *);
  80   void add_script (Grob *, Stream_event *, Stream_event *);
  81   void add_string (Grob *, Stream_event *, Stream_event *);
  82   void position_scripts (SCM orientations, vector<Finger_tuple> *);
  83 };
  84
  85 void
  86 New_fingering_engraver::acknowledge_rhythmic_head (Grob_info inf)
  87 {
  88   Stream_event *note_ev = inf.event_cause ();
  89   if (!note_ev)
  90     return;
  91
  92   SCM arts = note_ev->get_property ("articulations");
  93
  94   for (SCM s = arts; scm_is_pair (s); s = scm_cdr (s))
  95     {
  96       Stream_event *ev = unsmob_stream_event (scm_car (s));
  97
  98       if (!ev)
  99         continue;
 100
 101       if (ev->in_event_class ("fingering-event"))
 102         add_fingering (inf.grob (),
 103                        ly_symbol2scm ("Fingering"),
 104                        &fingerings_,
 105                        ev, note_ev);
 106       else if (ev->in_event_class ("text-script-event"))
 107         ev->origin ()->warning (_ ("cannot add text scripts to individual note heads"));
 108       else if (ev->in_event_class ("script-event"))
 109         add_script (inf.grob (), ev, note_ev);
 110       else if (ev->in_event_class ("string-number-event"))
 111         add_fingering (inf.grob (),
 112                        ly_symbol2scm ("StringNumber"), &string_numbers_,
 113                        ev, note_ev);
 114       else if (ev->in_event_class ("stroke-finger-event"))
 115         add_fingering (inf.grob (),
 116                        ly_symbol2scm ("StrokeFinger"), &stroke_fingerings_,
 117                        ev, note_ev);
 118       else if (ev->in_event_class ("harmonic-event"))
 119         {
 120           inf.grob ()->set_property ("style", ly_symbol2scm ("harmonic"));
 121           Grob *d = unsmob_grob (inf.grob ()->get_object ("dot"));
 122           if (d && !to_boolean (get_property ("harmonicDots")))
 123             d->suicide ();
 124         }
 125     }
 126
 127   heads_.push_back (inf.grob ());
 128 }
 129
 130 void
 131 New_fingering_engraver::acknowledge_stem (Grob_info inf)
 132 {
 133   stem_ = inf.grob ();
 134 }
 135
 136 void
 137 New_fingering_engraver::add_script (Grob *head,
 138                                     Stream_event *event,
 139                                     Stream_event * /* note */)
 140 {
 141   Finger_tuple ft;
 142
 143   Grob *g = make_item ("Script", event->self_scm ());
 144   make_script_from_event (g, context (),
 145                           event->get_property ("articulation-type"), 0);
 146   ft.script_ = g;
 147   ft.script_->set_parent (head, X_AXIS);
 148
 149   articulations_.push_back (ft);
 150 }
 151
 152 void
 153 New_fingering_engraver::add_fingering (Grob *head,
 154                                        SCM grob_sym,
 155                                        vector<Finger_tuple> *tuple_vector,
 156                                        Stream_event *event,
 157                                        Stream_event *hevent)
 158 {
 159   Finger_tuple ft;
 160
 161   ft.script_ = internal_make_item (grob_sym, event->self_scm (),
 162                                    ly_symbol2string (grob_sym).c_str (),
 163                                    __FILE__, __LINE__, __FUNCTION__
 164                                    );
 165
 166   Side_position_interface::add_support (ft.script_, head);
 167
 168   ft.finger_event_ = event;
 169   ft.note_event_ = hevent;
 170   ft.head_ = head;
 171
 172   tuple_vector->push_back (ft);
 173 }
 174
 175 void
 176 New_fingering_engraver::position_scripts (SCM orientations,
 177                                           vector<Finger_tuple> *scripts)
 178 {
 179   for (vsize i = 0; i < scripts->size (); i++)
 180     if (stem_ && to_boolean (scripts->at (i).script_->get_property ("add-stem-support")))
 181       Side_position_interface::add_support (scripts->at (i).script_, stem_);
 182
 183   /*
 184     This is not extremely elegant, but we have to do a little
 185     formatting here, because the parent/child relations should be
 186     known before we move on to the next time step.
 187
 188     A more sophisticated approach would be to set both X and Y parents
 189     to the note head, and write a more flexible function for
 190     positioning the fingerings, setting both X and Y coordinates.
 191   */
 192   for (vsize i = 0; i < scripts->size (); i++)
 193     (*scripts)[i].position_ = scm_to_int ((*scripts)[i].head_->get_property ("staff-position"));
 194
 195   for (vsize i = scripts->size (); i--;)
 196     for (vsize j = heads_.size (); j--;)
 197       Side_position_interface::add_support ((*scripts)[i].script_, heads_[j]);
 198
 199   vector<Finger_tuple> up, down, horiz;
 200   for (vsize i = scripts->size (); i--;)
 201     {
 202       SCM d = (*scripts)[i].finger_event_->get_property ("direction");
 203       if (to_dir (d))
 204         {
 205           ((to_dir (d) == UP) ? up : down).push_back ((*scripts)[i]);
 206           scripts->erase (scripts->begin () + i);
 207         }
 208     }
 209
 210   vector_sort (*scripts, less<Finger_tuple> ());
 211
 212   bool up_p = scm_c_memq (ly_symbol2scm ("up"), orientations) != SCM_BOOL_F;
 213   bool down_p = scm_c_memq (ly_symbol2scm ("down"), orientations) != SCM_BOOL_F;
 214   bool left_p = scm_c_memq (ly_symbol2scm ("left"), orientations) != SCM_BOOL_F;
 215   bool right_p = scm_c_memq (ly_symbol2scm ("right"), orientations) != SCM_BOOL_F;
 216   Direction hordir = (right_p) ? RIGHT : LEFT;
 217   if (left_p || right_p)
 218     {
 219       if (up_p && !up.size () && scripts->size ())
 220         {
 221           up.push_back (scripts->back ());
 222           scripts->pop_back ();
 223         }
 224
 225       if (down_p && !down.size () && scripts->size ())
 226         {
 227           down.push_back ((*scripts)[0]);
 228           scripts->erase (scripts->begin ());
 229         }
 230
 231       horiz.insert (horiz.end (), scripts->begin (), scripts->end ());
 232     }
 233   else if (up_p && down_p)
 234     {
 235       int center = scripts->size () / 2;
 236       down.insert (down.end (), scripts->begin (), scripts->begin () + center);
 237       up.insert (up.end (), scripts->begin () + center, scripts->end ());
 238     }
 239   else if (up_p)
 240     {
 241       up.insert (up.end (), scripts->begin (), scripts->end ());
 242       scripts->clear ();
 243     }
 244   else
 245     {
 246       if (!down_p)
 247         {
 248           warning (_ ("no placement found for fingerings"));
 249           warning (_ ("placing below"));
 250         }
 251       down.insert (down.end (), scripts->begin (), scripts->end ());
 252       scripts->clear ();
 253     }
 254
 255   for (vsize i = 0; i < horiz.size (); i++)
 256     {
 257       Finger_tuple ft = horiz[i];
 258       Grob *f = ft.script_;
 259       f->set_parent (ft.head_, X_AXIS);
 260       f->set_parent (ft.head_, Y_AXIS);
 261       f->set_property ("avoid-slur", SCM_BOOL_F);
 262       if (hordir == LEFT
 263           && unsmob_grob (ft.head_->get_object ("accidental-grob")))
 264         Side_position_interface::add_support (f,
 265                                               unsmob_grob (ft.head_->get_object ("accidental-grob")));
 266       else if (unsmob_grob (ft.head_->get_object ("dot")))
 267         Side_position_interface::add_support (f,
 268                                               unsmob_grob (ft.head_->get_object ("dot")));
 269
 270       Self_alignment_interface::set_align_self (f, Y_AXIS);
 271       Self_alignment_interface::set_center_parent (f, Y_AXIS);
 272       Side_position_interface::set_axis (f, X_AXIS);
 273
 274       f->set_property ("direction", scm_from_int (hordir));
 275     }
 276
 277   Direction d = DOWN;
 278   Drul_array< vector<Finger_tuple> > vertical (down, up);
 279   do
 280     {
 281       for (vsize i = 0; i < vertical[d].size (); i++)
 282         {
 283           Finger_tuple ft = vertical[d][i];
 284           Grob *f = ft.script_;
 285           int finger_prio = robust_scm2int (f->get_property ("script-priority"), 200);
 286           f->set_parent (ft.head_, X_AXIS);
 287           f->set_property ("script-priority",
 288                            scm_from_int (finger_prio + d * ft.position_));
 289
 290           Self_alignment_interface::set_align_self (f, X_AXIS);
 291           Self_alignment_interface::set_center_parent (f, X_AXIS);
 292           Side_position_interface::set_axis (f, Y_AXIS);
 293
 294           f->set_property ("direction", scm_from_int (d));
 295         }
 296     }
 297   while (flip (&d) != DOWN);
 298 }
 299
 300 void
 301 New_fingering_engraver::stop_translation_timestep ()
 302 {
 303   position_all ();
 304   stem_ = 0;
 305   heads_.clear ();
 306 }
 307
 308
 309 void
 310 New_fingering_engraver::position_all ()
 311 {
 312   if (fingerings_.size ())
 313     {
 314       position_scripts (get_property ("fingeringOrientations"),
 315                         &fingerings_);
 316       fingerings_.clear ();
 317     }
 318
 319   if (string_numbers_.size ())
 320     {
 321       position_scripts (get_property ("stringNumberOrientations"),
 322                         &string_numbers_);
 323       string_numbers_.clear ();
 324     }
 325
 326   if (stroke_fingerings_.size ())
 327     {
 328       position_scripts (get_property ("strokeFingerOrientations"),
 329                         &stroke_fingerings_);
 330       stroke_fingerings_.clear ();
 331     }
 332
 333   for (vsize i = articulations_.size (); i--;)
 334     {
 335       Grob *script = articulations_[i].script_;
 336
 337       for (vsize j = heads_.size (); j--;)
 338         Side_position_interface::add_support (script, heads_[j]);
 339
 340       if (stem_ && to_dir (script->get_property ("side-relative-direction")))
 341         script->set_object ("direction-source", stem_->self_scm ());
 342
 343       if (stem_ && to_boolean (script->get_property ("add-stem-support")))
 344         Side_position_interface::add_support (script, stem_);
 345     }
 346   articulations_.clear ();
 347 }
 348
 349 New_fingering_engraver::New_fingering_engraver ()
 350 {
 351   stem_ = 0;
 352 }
 353
 354
 355 ADD_ACKNOWLEDGER (New_fingering_engraver, rhythmic_head);
 356 ADD_ACKNOWLEDGER (New_fingering_engraver, stem);
 357
 358 ADD_TRANSLATOR (New_fingering_engraver,
 359                 /* doc */
 360                 "Create fingering scripts for notes in a new chord.  This"
 361                 " engraver is ill-named, since it also takes care of"
 362                 " articulations and harmonic note heads.",
 363
 364                 /* create */
 365                 "Fingering "
 366                 "StringNumber "
 367                 "StrokeFinger "
 368                 "Script ",
 369
 370                 /* read */
 371                 "fingeringOrientations "
 372                 "harmonicDots "
 373                 "strokeFingerOrientations "
 374                 "stringNumberOrientations ",
 375
 376                 /* write */
 377                 ""
 378                 );