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"
18 #include "output-def.hh"
19 #include "paper-column.hh"
20 #include "paper-score.hh"
21 #include "paper-system.hh"
22 #include "pointer-group-interface.hh"
23 #include "skyline-pair.hh"
24 #include "staff-symbol-referencer.hh"
27 System::System (System const &src)
36 System::System (SCM s)
45 System::init_elements ()
47 SCM scm_arr = Grob_array::make_array ();
48 all_elements_ = unsmob_grob_array (scm_arr);
49 all_elements_->set_ordered (false);
50 set_object ("all-elements", scm_arr);
54 System::clone () const
56 return new System (*this);
60 System::element_count () const
62 return all_elements_->size ();
66 System::spanner_count () const
69 for (vsize i = all_elements_->size (); i--;)
70 if (dynamic_cast<Spanner *> (all_elements_->grob (i)))
76 System::typeset_grob (Grob *elem)
79 programming_error ("adding element twice");
82 elem->layout_ = pscore_->layout ();
83 all_elements_->add (elem);
89 System::derived_mark () const
91 if (!all_elements_->empty ())
93 Grob **ptr = &all_elements_->array_reference ()[0];
94 Grob **end = ptr + all_elements_->size ();
97 scm_gc_mark ((*ptr)->self_scm ());
103 scm_gc_mark (pscore_->self_scm ());
105 Spanner::derived_mark ();
109 fixup_refpoints (vector<Grob*> const &grobs)
111 for (vsize i = grobs.size (); i--;)
112 grobs[i]->fixup_refpoint ();
116 System::do_break_substitution_and_fixup_refpoints ()
118 for (vsize i = 0; i < all_elements_->size (); i++)
120 Grob *g = all_elements_->grob (i);
121 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
124 Kill no longer needed grobs.
126 Item *it = dynamic_cast<Item *> (g);
127 if (it && Item::is_non_musical (it))
129 it->find_prebroken_piece (LEFT)->suicide ();
130 it->find_prebroken_piece (RIGHT)->suicide ();
134 else if (g->is_live ())
135 g->do_break_processing ();
139 fixups must be done in broken line_of_scores, because new elements
140 are put over there. */
142 for (vsize i = 0; i < broken_intos_.size (); i++)
144 Grob *se = broken_intos_[i];
146 extract_grob_set (se, "all-elements", all_elts);
147 for (vsize j = 0; j < all_elts.size (); j++)
149 Grob *g = all_elts[j];
150 g->fixup_refpoint ();
153 count += all_elts.size ();
157 needed for doing items.
159 fixup_refpoints (all_elements_->array ());
161 for (vsize i = 0; i < all_elements_->size (); i++)
162 all_elements_->grob (i)->handle_broken_dependencies ();
164 handle_broken_dependencies ();
166 /* Because the this->get_property (all-elements) contains items in 3
167 versions, handle_broken_dependencies () will leave duplicated
168 items in all-elements. Strictly speaking this is harmless, but
169 it leads to duplicated symbols in the output. uniq makes sure
170 that no duplicates are in the list. */
171 for (vsize i = 0; i < broken_intos_.size (); i++)
173 System *child = dynamic_cast<System*> (broken_intos_[i]);
174 child->all_elements_->remove_duplicates ();
177 if (be_verbose_global)
178 message (_f ("Element count %d.", count + element_count ()));
182 System::get_broken_system_grobs ()
185 for (vsize i = 0; i < broken_intos_.size (); i++)
186 ret = scm_cons (broken_intos_[i]->self_scm (), ret);
187 return scm_reverse (ret);
191 System::get_paper_systems ()
193 SCM lines = scm_c_make_vector (broken_intos_.size (), SCM_EOL);
194 for (vsize i = 0; i < broken_intos_.size (); i++)
196 if (be_verbose_global)
197 progress_indication ("[");
199 System *system = dynamic_cast<System *> (broken_intos_[i]);
201 scm_vector_set_x (lines, scm_from_int (i),
202 system->get_paper_system ());
204 if (be_verbose_global)
205 progress_indication (to_string (i) + "]");
211 System::break_into_pieces (vector<Column_x_positions> const &breaking)
213 for (vsize i = 0; i < breaking.size (); i++)
215 System *system = dynamic_cast<System *> (clone ());
216 system->rank_ = broken_intos_.size ();
218 vector<Grob*> c (breaking[i].cols_);
219 pscore_->typeset_system (system);
221 int st = Paper_column::get_rank (c[0]);
222 int end = Paper_column::get_rank (c.back ());
223 Interval iv (pure_height (this, st, end));
224 system->set_property ("pure-Y-extent", ly_interval2scm (iv));
226 system->set_bound (LEFT, c[0]);
227 system->set_bound (RIGHT, c.back ());
228 SCM system_labels = SCM_EOL;
229 for (vsize j = 0; j < c.size (); j++)
231 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
232 dynamic_cast<Paper_column *> (c[j])->system_ = system;
233 /* collect the column labels */
234 SCM col_labels = c[j]->get_property ("labels");
235 if (scm_is_pair (col_labels))
236 system_labels = scm_append (scm_list_2 (col_labels, system_labels));
238 system->set_property ("labels", system_labels);
240 set_loose_columns (system, &breaking[i]);
241 broken_intos_.push_back (system);
246 System::add_column (Paper_column *p)
249 Grob_array *ga = unsmob_grob_array (me->get_object ("columns"));
252 SCM scm_ga = Grob_array::make_array ();
253 me->set_object ("columns", scm_ga);
254 ga = unsmob_grob_array (scm_ga);
257 p->rank_ = ga->size ();
260 Axis_group_interface::add_element (this, p);
264 System::pre_processing ()
266 for (vsize i = 0; i < all_elements_->size (); i++)
267 all_elements_->grob (i)->discretionary_processing ();
269 if (be_verbose_global)
270 message (_f ("Grob count %d", element_count ()));
273 order is significant: broken grobs are added to the end of the
274 array, and should be processed before the original is potentially
277 for (vsize i = all_elements_->size (); i--;)
278 all_elements_->grob (i)->handle_prebroken_dependencies ();
280 fixup_refpoints (all_elements_->array ());
282 for (vsize i = 0; i < all_elements_->size (); i++)
284 Grob *g = all_elements_->grob (i);
285 (void) g->get_property ("before-line-breaking");
288 for (vsize i = 0; i < all_elements_->size (); i++)
290 Grob *e = all_elements_->grob (i);
291 (void) e->get_property ("springs-and-rods");
296 System::post_processing ()
298 for (vsize i = 0; i < all_elements_->size (); i++)
300 Grob *g = all_elements_->grob (i);
302 (void) g->get_property ("after-line-breaking");
305 Interval iv (extent (this, Y_AXIS));
307 programming_error ("system with empty extent");
309 translate_axis (-iv[MAX], Y_AXIS);
311 /* Generate all stencils to trigger font loads.
312 This might seem inefficient, but Stencils are cached per grob
315 vector<Grob*> all_elts_sorted (all_elements_->array ());
316 vector_sort (all_elts_sorted, std::less<Grob*> ());
317 uniq (all_elts_sorted);
318 this->get_stencil ();
319 for (vsize i = all_elts_sorted.size (); i--;)
321 Grob *g = all_elts_sorted[i];
333 operator< (Layer_entry const &a,
334 Layer_entry const &b)
336 return a.layer_ < b.layer_;
341 System::get_paper_system ()
348 vector<Layer_entry> entries;
349 for (vsize j = 0; j < all_elements_->size (); j++)
352 e.grob_ = all_elements_->grob (j);
353 e.layer_ = robust_scm2int (e.grob_->get_property ("layer"), 1);
355 entries.push_back (e);
358 vector_sort (entries, std::less<Layer_entry> ());
359 for (vsize j = 0; j < entries.size (); j++)
361 Grob *g = entries[j].grob_;
362 Stencil st = g->get_print_stencil ();
364 if (st.expr () == SCM_EOL)
368 for (int a = X_AXIS; a < NO_AXES; a++)
369 o[Axis (a)] = g->relative_coordinate (this, Axis (a));
371 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
373 * Staff_symbol_referencer::staff_space (g);
375 /* Must copy the stencil, for we cannot change the stencil
378 st.translate (o + extra);
380 *tail = scm_cons (st.expr (), SCM_EOL);
381 tail = SCM_CDRLOC (*tail);
384 if (Stencil *me = get_stencil ())
385 exprs = scm_cons (me->expr (), exprs);
387 Interval x (extent (this, X_AXIS));
388 Interval y (extent (this, Y_AXIS));
389 Stencil sys_stencil (Box (x, y),
390 scm_cons (ly_symbol2scm ("combine-stencil"),
394 Skyline_pair *skylines = Skyline_pair::unsmob (get_property ("vertical-skylines"));
398 = Lookup::points_to_line_stencil (0.1, (*skylines)[UP].to_points (X_AXIS));
400 = Lookup::points_to_line_stencil (0.1, (*skylines)[DOWN].to_points (X_AXIS));
401 sys_stencil.add_stencil (up.in_color (255, 0, 0));
402 sys_stencil.add_stencil (down.in_color (0, 255, 0));
406 Grob *left_bound = this->get_bound (LEFT);
407 SCM prop_init = left_bound->get_property ("line-break-system-details");
408 Prob *pl = make_paper_system (prop_init);
409 paper_system_set_stencil (pl, sys_stencil);
411 /* information that the page breaker might need */
412 Grob *right_bound = this->get_bound (RIGHT);
413 pl->set_property ("vertical-skylines", this->get_property ("vertical-skylines"));
414 pl->set_property ("page-break-permission", right_bound->get_property ("page-break-permission"));
415 pl->set_property ("page-turn-permission", right_bound->get_property ("page-turn-permission"));
416 pl->set_property ("page-break-penalty", right_bound->get_property ("page-break-penalty"));
417 pl->set_property ("page-turn-penalty", right_bound->get_property ("page-turn-penalty"));
419 Interval staff_refpoints;
420 extract_grob_set (this, "spaceable-staves", staves);
421 for (vsize i = 0; i < staves.size (); i++)
422 staff_refpoints.add_point (staves[i]->relative_coordinate (this, Y_AXIS));
424 pl->set_property ("staff-refpoint-extent", ly_interval2scm (staff_refpoints));
425 pl->set_property ("system-grob", this->self_scm ());
427 return pl->unprotect ();
431 System::broken_col_range (Item const *left, Item const *right) const
435 left = left->get_column ();
436 right = right->get_column ();
439 extract_grob_set (this, "columns", cols);
441 vsize i = Paper_column::get_rank (left);
442 int end_rank = Paper_column::get_rank (right);
443 if (i < cols.size ())
446 while (i < cols.size ()
447 && Paper_column::get_rank (cols[i]) < end_rank)
449 Paper_column *c = dynamic_cast<Paper_column *> (cols[i]);
450 if (Paper_column::is_breakable (c) && !c->system_)
459 /** Return all columns, but filter out any unused columns , since they might
460 disrupt the spacing problem. */
462 System::used_columns () const
464 extract_grob_set (this, "columns", ro_columns);
466 int last_breakable = ro_columns.size ();
468 while (last_breakable--)
470 if (Paper_column::is_breakable (ro_columns [last_breakable]))
474 vector<Grob*> columns;
475 for (int i = 0; i <= last_breakable; i++)
477 if (Paper_column::is_used (ro_columns[i]))
478 columns.push_back (ro_columns[i]);
485 System::column (vsize which) const
487 extract_grob_set (this, "columns", columns);
488 if (which >= columns.size ())
491 return dynamic_cast<Paper_column*> (columns[which]);
495 System::paper_score () const
501 System::get_rank () const
507 get_root_system (Grob *me)
509 Grob *system_grob = me;
511 while (system_grob->get_parent (Y_AXIS))
512 system_grob = system_grob->get_parent (Y_AXIS);
514 return dynamic_cast<System*> (system_grob);
517 ADD_INTERFACE (System,
518 "This is the top-level object: Each object in a score"
519 " ultimately has a @code{System} object as its X and"
529 "skyline-horizontal-padding "