2 system.cc -- implement System
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "align-interface.hh"
12 #include "all-font-metrics.hh"
13 #include "axis-group-interface.hh"
14 #include "grob-array.hh"
15 #include "international.hh"
17 #include "output-def.hh"
18 #include "paper-column.hh"
19 #include "paper-score.hh"
20 #include "paper-system.hh"
21 #include "pointer-group-interface.hh"
22 #include "spacing-interface.hh"
23 #include "staff-symbol-referencer.hh"
24 #include "tweak-registration.hh"
28 extern bool debug_skylines;
30 System::System (System const &src, int count)
31 : Spanner (src, count)
39 System::System (SCM s, Object_key const *key)
48 System::init_elements ()
50 SCM scm_arr = Grob_array::make_array ();
51 all_elements_ = unsmob_grob_array (scm_arr);
52 all_elements_->set_ordered (false);
53 set_object ("all-elements", scm_arr);
57 System::clone (int index) const
59 return new System (*this, index);
63 System::element_count () const
65 return all_elements_->size ();
69 System::spanner_count () const
72 for (vsize i = all_elements_->size (); i--;)
73 if (dynamic_cast<Spanner *> (all_elements_->grob (i)))
79 System::typeset_grob (Grob *elem)
82 programming_error ("adding element twice");
85 elem->layout_ = pscore_->layout ();
86 all_elements_->add (elem);
92 System::derived_mark () const
94 if (!all_elements_->empty ())
96 Grob **ptr = &all_elements_->array_reference ()[0];
97 Grob **end = ptr + all_elements_->size ();
100 scm_gc_mark ((*ptr)->self_scm ());
106 scm_gc_mark (pscore_->self_scm ());
108 Spanner::derived_mark ();
112 fixup_refpoints (vector<Grob*> const &grobs)
114 for (vsize i = grobs.size (); i--;)
115 grobs[i]->fixup_refpoint ();
119 System::get_paper_systems ()
121 for (vsize i = 0; i < all_elements_->size (); i++)
123 Grob *g = all_elements_->grob (i);
124 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
127 Kill no longer needed grobs.
129 Item *it = dynamic_cast<Item *> (g);
130 if (it && Item::is_non_musical (it))
132 it->find_prebroken_piece (LEFT)->suicide ();
133 it->find_prebroken_piece (RIGHT)->suicide ();
137 else if (g->is_live ())
138 g->do_break_processing ();
142 fixups must be done in broken line_of_scores, because new elements
143 are put over there. */
145 for (vsize i = 0; i < broken_intos_.size (); i++)
147 Grob *se = broken_intos_[i];
149 extract_grob_set (se, "all-elements", all_elts);
150 for (vsize j = 0; j < all_elts.size (); j++)
152 Grob *g = all_elts[j];
153 g->fixup_refpoint ();
156 count += all_elts.size ();
160 needed for doing items.
162 fixup_refpoints (all_elements_->array ());
164 for (vsize i = 0; i < all_elements_->size (); i++)
165 all_elements_->grob (i)->handle_broken_dependencies ();
167 handle_broken_dependencies ();
169 /* Because the this->get_property (all-elements) contains items in 3
170 versions, handle_broken_dependencies () will leave duplicated
171 items in all-elements. Strictly speaking this is harmless, but
172 it leads to duplicated symbols in the output. uniq makes sure
173 that no duplicates are in the list. */
174 for (vsize i = 0; i < broken_intos_.size (); i++)
176 System *child = dynamic_cast<System*> (broken_intos_[i]);
177 child->all_elements_->remove_duplicates ();
180 if (be_verbose_global)
181 message (_f ("Element count %d.", count + element_count ()));
183 SCM lines = scm_c_make_vector (broken_intos_.size (), SCM_EOL);
184 for (vsize i = 0; i < broken_intos_.size (); i++)
186 if (be_verbose_global)
187 progress_indication ("[");
189 System *system = dynamic_cast<System *> (broken_intos_[i]);
191 system->post_processing ();
192 system->build_skylines ();
195 System *prev = dynamic_cast<System*> (broken_intos_[i-1]);
196 Real r = prev->skylines_[DOWN].distance (system->skylines_[UP]);
197 system->set_property ("skyline-distance", scm_from_double (r));
199 scm_vector_set_x (lines, scm_from_int (i),
200 system->get_paper_system ());
202 if (be_verbose_global)
203 progress_indication (to_string (i) + "]");
209 System::break_into_pieces (vector<Column_x_positions> const &breaking)
211 for (vsize i = 0; i < breaking.size (); i++)
213 System *system = dynamic_cast<System *> (clone (broken_intos_.size ()));
214 system->rank_ = broken_intos_.size ();
216 vector<Grob*> c (breaking[i].cols_);
217 pscore_->typeset_system (system);
219 int st = Paper_column::get_rank (c[0]);
220 int end = Paper_column::get_rank (c.back ());
221 Interval iv (pure_height (this, st, end));
222 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
224 system->set_bound (LEFT, c[0]);
225 system->set_bound (RIGHT, c.back ());
226 for (vsize j = 0; j < c.size (); j++)
228 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
229 dynamic_cast<Paper_column *> (c[j])->system_ = system;
232 set_loose_columns (system, &breaking[i]);
233 broken_intos_.push_back (system);
238 System::add_column (Paper_column *p)
241 Grob_array *ga = unsmob_grob_array (me->get_object ("columns"));
244 SCM scm_ga = Grob_array::make_array ();
245 me->set_object ("columns", scm_ga);
246 ga = unsmob_grob_array (scm_ga);
249 p->rank_ = ga->size ();
252 Axis_group_interface::add_element (this, p);
256 System::pre_processing ()
258 for (vsize i = 0; i < all_elements_->size (); i++)
259 all_elements_->grob (i)->discretionary_processing ();
261 if (be_verbose_global)
262 message (_f ("Grob count %d", element_count ()));
265 order is significant: broken grobs are added to the end of the
266 array, and should be processed before the original is potentially
269 for (vsize i = all_elements_->size (); i--;)
270 all_elements_->grob (i)->handle_prebroken_dependencies ();
272 fixup_refpoints (all_elements_->array ());
274 for (vsize i = 0; i < all_elements_->size (); i++)
276 Grob *g = all_elements_->grob (i);
277 (void) g->get_property ("before-line-breaking");
280 for (vsize i = 0; i < all_elements_->size (); i++)
282 Grob *e = all_elements_->grob (i);
283 (void) e->get_property ("springs-and-rods");
288 System::post_processing ()
290 for (vsize i = 0; i < all_elements_->size (); i++)
292 Grob *g = all_elements_->grob (i);
294 (void) g->get_property ("after-line-breaking");
297 Interval iv (extent (this, Y_AXIS));
299 programming_error ("system with empty extent");
301 translate_axis (-iv[MAX], Y_AXIS);
303 /* Generate all stencils to trigger font loads.
304 This might seem inefficient, but Stencils are cached per grob
307 vector<Grob*> all_elts_sorted (all_elements_->array ());
308 vector_sort (all_elts_sorted, std::less<Grob*> ());
309 uniq (all_elts_sorted);
310 this->get_stencil ();
311 for (vsize i = all_elts_sorted.size (); i--;)
313 Grob *g = all_elts_sorted[i];
325 operator< (Layer_entry const &a,
326 Layer_entry const &b)
328 return a.layer_ < b.layer_;
333 System::get_paper_system ()
338 vector<Layer_entry> entries;
339 for (vsize j = 0; j < all_elements_->size (); j++)
342 e.grob_ = all_elements_->grob (j);
343 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
345 entries.push_back (e);
348 vector_sort (entries, std::less<Layer_entry> ());
349 for (vsize j = 0; j < entries.size (); j++)
351 Grob *g = entries[j].grob_;
352 Stencil st = g->get_print_stencil ();
354 if (st.expr() == SCM_EOL)
358 for (int a = X_AXIS; a < NO_AXES; a++)
359 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
361 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
363 * Staff_symbol_referencer::staff_space (g);
365 /* Must copy the stencil, for we cannot change the stencil
368 st.translate (o + extra);
370 *tail = scm_cons (st.expr (), SCM_EOL);
371 tail = SCM_CDRLOC (*tail);
374 if (Stencil *me = get_stencil ())
375 exprs = scm_cons (me->expr (), exprs);
377 Interval x (extent (this, X_AXIS));
378 Interval y (extent (this, Y_AXIS));
379 Stencil sys_stencil (Box (x, y),
380 scm_cons (ly_symbol2scm ("combine-stencil"),
384 sys_stencil.add_stencil (Lookup::points_to_line_stencil (0.1, skylines_[UP].to_points ()).in_color (255, 0, 0));
385 sys_stencil.add_stencil (Lookup::points_to_line_stencil (0.1, skylines_[DOWN].to_points ()).in_color (0, 255, 0));
388 Grob *left_bound = this->get_bound (LEFT);
389 SCM prop_init = left_bound->get_property ("line-break-system-details");
390 Prob *pl = make_paper_system (prop_init);
391 paper_system_set_stencil (pl, sys_stencil);
393 /* information that the page breaker might need */
394 Grob *right_bound = this->get_bound (RIGHT);
395 pl->set_property ("skyline-distance", get_property ("skyline-distance"));
396 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
397 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
398 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
399 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
401 if (!scm_is_pair (pl->get_property ("refpoint-Y-extent")))
403 Interval staff_refpoints;
404 staff_refpoints.set_empty ();
405 extract_grob_set (this, "spaceable-staves", staves);
406 for (vsize i = 0; i < staves.size (); i++)
409 staff_refpoints.add_point (g->relative_coordinate (this, Y_AXIS));
411 pl->set_property ("refpoint-Y-extent", ly_interval2scm (staff_refpoints));
414 pl->set_property ("system-grob", this->self_scm ());
416 return pl->unprotect ();
420 System::broken_col_range (Item const *left, Item const *right) const
424 left = left->get_column ();
425 right = right->get_column ();
428 extract_grob_set (this, "columns", cols);
430 vsize i = Paper_column::get_rank (left);
431 int end_rank = Paper_column::get_rank (right);
432 if (i < cols.size ())
435 while (i < cols.size ()
436 && Paper_column::get_rank (cols[i]) < end_rank)
438 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
439 if (Paper_column::is_breakable (c) && !c->system_)
448 /** Return all columns, but filter out any unused columns , since they might
449 disrupt the spacing problem. */
451 System::used_columns () const
453 extract_grob_set (this, "columns", ro_columns);
455 int last_breakable = ro_columns.size ();
457 while (last_breakable--)
459 if (Paper_column::is_breakable (ro_columns [last_breakable]))
463 vector<Grob*> columns;
464 for (int i = 0; i <= last_breakable; i++)
466 if (Paper_column::is_used (ro_columns[i]))
467 columns.push_back (ro_columns[i]);
474 System::column (vsize which) const
476 extract_grob_set (this, "columns", columns);
477 if (which >= columns.size ())
480 return dynamic_cast<Paper_column*> (columns[which]);
484 System::paper_score () const
490 System::get_rank () const
496 get_root_system (Grob *me)
498 Grob *system_grob = me;
500 while (system_grob->get_parent (Y_AXIS))
501 system_grob = system_grob->get_parent (Y_AXIS);
503 return dynamic_cast<System*> (system_grob);
507 System::build_skylines ()
510 for (vsize i = 0; i < all_elements_->size (); i++)
512 Grob *g = all_elements_->grob (i);
513 if (!unsmob_stencil (g->get_property ("stencil")))
516 Interval xiv = g->extent (this, X_AXIS);
517 Interval yiv = g->extent (this, Y_AXIS);
518 if (!xiv.is_empty () && !yiv.is_empty ())
519 boxes.push_back (Box (xiv, yiv));
522 SCM horizon_padding_scm = get_property ("skyline-horizontal-padding");
523 Real horizon_padding = robust_scm2double (horizon_padding_scm, 0);
524 skylines_[UP] = Skyline (boxes, horizon_padding, X_AXIS, UP);
525 skylines_[DOWN] = Skyline (boxes, horizon_padding, X_AXIS, DOWN);
529 ADD_INTERFACE (System,
530 "This is the toplevel object: each object in a score "
531 "ultimately has a System object as its X and Y parent. ",
539 "skyline-horizontal-padding "