lily/new-fingering-engraver.cc

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