2 system.cc -- implement System
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "align-interface.hh"
12 #include "axis-group-interface.hh"
16 #include "paper-column.hh"
17 #include "output-def.hh"
18 #include "paper-outputter.hh"
19 #include "paper-score.hh"
23 #include "all-font-metrics.hh"
24 #include "spacing-interface.hh"
25 #include "staff-symbol-referencer.hh"
26 #include "paper-book.hh"
27 #include "paper-system.hh"
29 System::System (SCM s)
36 System::element_count () const
38 return scm_ilength (get_property ("all-elements"));
42 System::spanner_count () const
45 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
46 if (dynamic_cast<Spanner*> (unsmob_grob (ly_car (s))))
52 System::typeset_grob (Grob * elem)
55 programming_error ("Adding element twice.");
58 elem->pscore_ = pscore_;
59 Pointer_group_interface::add_grob (this, ly_symbol2scm ("all-elements"), elem);
60 scm_gc_unprotect_object (elem->self_scm ());
66 fixup_refpoints (SCM s)
68 for (; ly_c_pair_p (s); s = ly_cdr (s))
70 Grob::fixup_refpoint (ly_car (s));
77 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
79 Grob *g = unsmob_grob (ly_car (s));
80 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
83 Kill no longer needed grobs.
85 Item * it = dynamic_cast<Item*> (g);
86 if (it && Item::is_breakable (it))
88 it->find_prebroken_piece (LEFT)->suicide ();
89 it->find_prebroken_piece (RIGHT)->suicide ();
93 else if (g->is_live ())
94 g->do_break_processing ();
98 fixups must be done in broken line_of_scores, because new elements
99 are put over there. */
101 for (int i=0; i < broken_intos_.size (); i++)
103 Grob *se = broken_intos_[i];
104 SCM all = se->get_property ("all-elements");
105 for (SCM s = all; ly_c_pair_p (s); s = ly_cdr (s))
106 fixup_refpoint (ly_car (s));
107 count += scm_ilength (all);
111 needed for doing items.
113 fixup_refpoints (get_property ("all-elements"));
115 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
116 unsmob_grob (ly_car (s))->handle_broken_dependencies ();
117 handle_broken_dependencies ();
119 #if 0 /* don't do this: strange side effects. */
121 /* Because the this->get_property (all-elements) contains items in 3
122 versions, handle_broken_dependencies () will leave duplicated
123 items in all-elements. Strictly speaking this is harmless, but
124 it leads to duplicated symbols in the output. ly_list_qsort_uniq_x ()
125 makes sure that no duplicates are in the list. */
126 for (int i = 0; i < line_count; i++)
128 SCM all = broken_intos_[i]->get_property ("all-elements");
129 all = ly_list_qsort_uniq_x(all);
133 if (verbose_global_b)
134 progress_indication (_f ("Element count %d.", count + element_count ()));
136 int line_count = broken_intos_.size ();
137 SCM lines = scm_c_make_vector (line_count, SCM_EOL);
139 for (int i = 0; i < line_count; i++)
141 if (verbose_global_b)
142 progress_indication ("[");
144 System *system = dynamic_cast<System*> (broken_intos_[i]);
145 system->post_processing ();
146 scm_vector_set_x (lines, scm_int2num (i), system->get_line ());
148 if (verbose_global_b)
149 progress_indication (to_string (i) + "]");
154 /* Find the loose columns in POSNS, and drape them around the columns
155 specified in BETWEEN-COLS. */
157 set_loose_columns (System* which, Column_x_positions const *posns)
159 int loose_col_count = posns->loose_cols_.size ();
160 for (int i = 0; i < loose_col_count; i++)
163 Item *loose = dynamic_cast<Item*> (posns->loose_cols_[i]);
164 Paper_column* col = dynamic_cast<Paper_column*> (loose);
173 SCM between = loose->get_property ("between-cols");
174 if (!ly_c_pair_p (between))
177 Item *le = dynamic_cast<Item*> (unsmob_grob (ly_car (between)));
178 Item *re = dynamic_cast<Item*> (unsmob_grob (ly_cdr (between)));
185 left = le->get_column ();
186 if (!left->get_system ())
187 left = left->find_prebroken_piece (RIGHT);
191 loose = right = re->get_column ();
194 if (!right->get_system ())
195 right = right->find_prebroken_piece (LEFT);
197 /* Divide the remaining space of the column over the left and
198 right side. At the moment, FIXME */
199 Grob *common = right->common_refpoint (left, X_AXIS);
201 Real rx = right->extent (common, X_AXIS)[LEFT];
202 Real lx = left->extent (common, X_AXIS)[RIGHT];
203 Real total_dx = rx - lx;
204 Interval cval =col->extent (col, X_AXIS);
206 /* Put it in the middle. This is not an ideal solution -- the
207 break alignment code inserts a fixed space before the clef
208 (about 1 SS), while the space following the clef is flexible.
209 In tight situations, the clef will almost be on top of the
211 Real dx = rx - lx - cval.length ();
212 if (total_dx < 2* cval.length ())
214 /* TODO: this is discontinuous. I'm too tired to
215 invent a sliding mechanism. Duh. */
221 col->system_ = which;
222 col->translate_axis (-col->relative_coordinate (common, X_AXIS), X_AXIS);
223 col->translate_axis (lx + dx - cval[LEFT], X_AXIS);
229 System::break_into_pieces (Array<Column_x_positions> const &breaking)
231 for (int i = 0; i < breaking.size (); i++)
233 System *system = dynamic_cast <System*> (clone ());
236 Link_array<Grob> c (breaking[i].cols_);
237 pscore_->typeset_line (system);
239 system->set_bound (LEFT,c[0]);
240 system->set_bound (RIGHT,c.top ());
241 for (int j = 0; j < c.size (); j++)
243 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
244 dynamic_cast<Paper_column*> (c[j])->system_ = system;
246 set_loose_columns (system, &breaking[i]);
247 broken_intos_.push (system);
252 System::add_column (Paper_column*p)
255 SCM cs = me->get_property ("columns");
256 Grob *prev = ly_c_pair_p (cs) ? unsmob_grob (ly_car (cs)) : 0;
258 p->rank_ = prev ? Paper_column::get_rank (prev) + 1 : 0;
260 me->set_property ("columns", scm_cons (p->self_scm (), cs));
262 Axis_group_interface::add_element (me, p);
266 System::pre_processing ()
268 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
269 unsmob_grob (ly_car (s))->discretionary_processing ();
271 if (verbose_global_b)
272 progress_indication (_f ("Grob count %d", element_count ()));
274 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
275 unsmob_grob (ly_car (s))->handle_prebroken_dependencies ();
277 fixup_refpoints (get_property ("all-elements"));
279 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
281 Grob *sc = unsmob_grob (ly_car (s));
282 sc->calculate_dependencies (PRECALCED, PRECALCING, ly_symbol2scm ("before-line-breaking-callback"));
285 progress_indication ("\n");
286 progress_indication (_ ("Calculating line breaks..."));
287 progress_indication (" ");
288 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
290 Grob *e = unsmob_grob (ly_car (s));
291 SCM proc = e->get_property ("spacing-procedure");
292 if (ly_c_procedure_p (proc))
293 scm_call_1 (proc, e->self_scm ());
298 System::post_processing ()
300 for (SCM s = get_property ("all-elements"); ly_c_pair_p (s); s = ly_cdr (s))
302 Grob *g = unsmob_grob (ly_car (s));
303 g->calculate_dependencies (POSTCALCED, POSTCALCING,
304 ly_symbol2scm ("after-line-breaking-callback"));
307 Interval iv (extent (this, Y_AXIS));
309 programming_error ("System with zero extent.");
311 translate_axis (-iv[MAX], Y_AXIS);
313 /* Generate all stencils to trigger font loads.
314 This might seem inefficient, but Stencils are cached per grob
316 SCM all = get_property ("all-elements");
317 all = ly_list_qsort_uniq_x (all);
319 this->get_stencil ();
320 for (SCM s = all; ly_c_pair_p (s); s = ly_cdr (s))
322 Grob *g = unsmob_grob (ly_car (s));
330 static int const LAYER_COUNT = 3;
335 /* Output stencils in three layers: 0, 1, 2. Default layer: 1.
337 Start with layer 3, since scm_cons prepends to list. */
338 SCM all = get_property ("all-elements");
339 Interval staff_refpoints;
340 staff_refpoints.set_empty();
342 for (int i = LAYER_COUNT; i--;)
343 for (SCM s = all; ly_c_pair_p (s); s = ly_cdr (s))
345 Grob *g = unsmob_grob (ly_car (s));
346 Stencil *stil = g->get_stencil ();
349 && Axis_group_interface::has_interface (g)
350 && !Align_interface::has_interface (g)
351 && dynamic_cast<Spanner*> (g))
353 staff_refpoints.add_point (g->relative_coordinate (this, Y_AXIS));
356 /* Skip empty stencils and grobs that are not in this layer. */
358 || robust_scm2int (g->get_property ("layer"), 1) != i)
361 Offset o (g->relative_coordinate (this, X_AXIS),
362 g->relative_coordinate (this, Y_AXIS));
364 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
366 * Staff_symbol_referencer::staff_space (g);
368 /* Must copy the stencil, for we cannot change the stencil
372 st.translate (o + extra);
373 *tail = scm_cons (st.expr (), SCM_EOL);
374 tail = SCM_CDRLOC(*tail);
377 if (Stencil *me = get_stencil ())
378 exprs = scm_cons (me->expr (), exprs);
380 Interval x (extent (this, X_AXIS));
381 Interval y (extent (this, Y_AXIS));
382 Stencil sys_stencil (Box (x,y),
383 scm_cons (ly_symbol2scm ("combine-stencil"),
386 Paper_system *pl = new Paper_system (sys_stencil, false);
387 pl->staff_refpoints_ = staff_refpoints;
388 Item * break_point =this->get_bound(LEFT);
390 robust_scm2double (break_point->get_property ("page-penalty"), 0.0);
392 return scm_gc_unprotect_object (pl->self_scm ());
396 System::broken_col_range (Item const *left, Item const *right) const
398 Link_array<Item> ret;
400 left = left->get_column ();
401 right = right->get_column ();
402 SCM s = get_property ("columns");
404 while (ly_c_pair_p (s) && ly_car (s) != right->self_scm ())
410 while (ly_c_pair_p (s) && ly_car (s) != left->self_scm ())
412 Paper_column*c = dynamic_cast<Paper_column*> (unsmob_grob (ly_car (s)));
413 if (Item::is_breakable (c) && !c->system_)
423 /** Return all columns, but filter out any unused columns , since they might
424 disrupt the spacing problem. */
426 System::columns () const
429 = Pointer_group_interface__extract_grobs (this, (Grob*) 0, "columns");
431 for (int i = acs.size (); i--;)
433 bool brb = Item::is_breakable (acs[i]);
434 found = found || brb;
437 the last column should be breakable. Weed out any columns that
438 seem empty. We need to retain breakable columns, in case
439 someone forced a breakpoint.
441 if (!found || !Paper_column::is_used (acs[i]))
447 ADD_INTERFACE (System,"system-interface",
448 "This is the toplevel object: each object in a score "
449 "ultimately has a System object as its X and Y parent. ",
450 "all-elements columns")