2 system.cc -- implement System
4 source file of the GNU LilyPond music typesetter
6 (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
13 #include "align-interface.hh"
14 #include "axis-group-interface.hh"
17 #include "paper-column.hh"
18 #include "output-def.hh"
19 #include "paper-score.hh"
21 #include "all-font-metrics.hh"
22 #include "spacing-interface.hh"
23 #include "staff-symbol-referencer.hh"
24 #include "paper-book.hh"
25 #include "paper-system.hh"
26 #include "tweak-registration.hh"
29 System::System (System const &src, int count)
30 : Spanner (src, count)
35 System::System (SCM s, Object_key const*key)
43 System::clone (int count) const
45 return new System (*this, count);
50 System::element_count () const
52 return scm_ilength (get_property ("all-elements"));
56 System::spanner_count () const
59 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
60 if (dynamic_cast<Spanner*> (unsmob_grob (scm_car (s))))
66 System::typeset_grob (Grob * elem)
69 programming_error ("Adding element twice.");
72 elem->pscore_ = pscore_;
73 Pointer_group_interface::add_grob (this, ly_symbol2scm ("all-elements"), elem);
74 scm_gc_unprotect_object (elem->self_scm ());
80 fixup_refpoints (SCM s)
82 for (; scm_is_pair (s); s = scm_cdr (s))
84 Grob::fixup_refpoint (scm_car (s));
91 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
93 Grob *g = unsmob_grob (scm_car (s));
94 if (g->internal_has_interface (ly_symbol2scm ("only-prebreak-interface")))
97 Kill no longer needed grobs.
99 Item * it = dynamic_cast<Item*> (g);
100 if (it && Item::is_breakable (it))
102 it->find_prebroken_piece (LEFT)->suicide ();
103 it->find_prebroken_piece (RIGHT)->suicide ();
107 else if (g->is_live ())
108 g->do_break_processing ();
112 fixups must be done in broken line_of_scores, because new elements
113 are put over there. */
115 for (int i = 0; i < broken_intos_.size (); i++)
117 Grob *se = broken_intos_[i];
118 SCM all = se->get_property ("all-elements");
119 for (SCM s = all; scm_is_pair (s); s = scm_cdr (s))
120 fixup_refpoint (scm_car (s));
121 count += scm_ilength (all);
125 needed for doing items.
127 fixup_refpoints (get_property ("all-elements"));
129 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
130 unsmob_grob (scm_car (s))->handle_broken_dependencies ();
131 handle_broken_dependencies ();
133 #if 0 /* don't do this: strange side effects. */
135 /* Because the this->get_property (all-elements) contains items in 3
136 versions, handle_broken_dependencies () will leave duplicated
137 items in all-elements. Strictly speaking this is harmless, but
138 it leads to duplicated symbols in the output. ly_list_qsort_uniq_x ()
139 makes sure that no duplicates are in the list. */
140 for (int i = 0; i < line_count; i++)
142 SCM all = broken_intos_[i]->get_property ("all-elements");
143 all = ly_list_qsort_uniq_x(all);
147 if (be_verbose_global)
148 progress_indication (_f ("Element count %d.", count + element_count ()));
150 int line_count = broken_intos_.size ();
151 SCM lines = scm_c_make_vector (line_count, SCM_EOL);
153 for (int i = 0; i < line_count; i++)
155 if (be_verbose_global)
156 progress_indication ("[");
158 System *system = dynamic_cast<System*> (broken_intos_[i]);
159 system->post_processing ();
160 scm_vector_set_x (lines, scm_int2num (i), system->get_line ());
162 if (be_verbose_global)
163 progress_indication (to_string (i) + "]");
168 /* Find the loose columns in POSNS, and drape them around the columns
169 specified in BETWEEN-COLS. */
171 set_loose_columns (System* which, Column_x_positions const *posns)
173 int loose_col_count = posns->loose_cols_.size ();
174 for (int i = 0; i < loose_col_count; i++)
177 Item *loose = dynamic_cast<Item*> (posns->loose_cols_[i]);
178 Paper_column* col = dynamic_cast<Paper_column*> (loose);
187 SCM between = loose->get_property ("between-cols");
188 if (!scm_is_pair (between))
191 Item *le = dynamic_cast<Item*> (unsmob_grob (scm_car (between)));
192 Item *re = dynamic_cast<Item*> (unsmob_grob (scm_cdr (between)));
199 left = le->get_column ();
200 if (!left->get_system ())
201 left = left->find_prebroken_piece (RIGHT);
205 loose = right = re->get_column ();
208 if (!right->get_system ())
209 right = right->find_prebroken_piece (LEFT);
211 /* Divide the remaining space of the column over the left and
212 right side. At the moment, FIXME */
213 Grob *common = right->common_refpoint (left, X_AXIS);
215 Real right_point = right->extent (common, X_AXIS)[LEFT];
216 Real left_point = left->extent (common, X_AXIS)[RIGHT];
217 Interval my_extent = col->extent (col, X_AXIS);
219 Real space_left = (right_point - left_point)
220 - (my_extent.is_empty() ? 0.0 : my_extent.length ());
222 Real padding = (space_left / 2) <? 1.0;
224 Put it just left of the right column, with a bit of extra space
226 Real my_offset = right_point - my_extent[RIGHT] - padding;
228 col->system_ = which;
229 col->translate_axis (my_offset - col->relative_coordinate (common, X_AXIS), X_AXIS);
234 System::break_into_pieces (Array<Column_x_positions> const &breaking)
236 for (int i = 0; i < breaking.size (); i++)
238 System *system = dynamic_cast <System*> (clone (i));
241 Link_array<Grob> c (breaking[i].cols_);
242 pscore_->typeset_line (system);
244 system->set_bound (LEFT, c[0]);
245 system->set_bound (RIGHT, c.top ());
246 for (int j = 0; j < c.size (); j++)
248 c[j]->translate_axis (breaking[i].config_[j], X_AXIS);
249 dynamic_cast<Paper_column*> (c[j])->system_ = system;
251 set_loose_columns (system, &breaking[i]);
252 broken_intos_.push (system);
257 System::add_column (Paper_column*p)
260 SCM cs = me->get_property ("columns");
261 Grob *prev = scm_is_pair (cs) ? unsmob_grob (scm_car (cs)) : 0;
263 p->rank_ = prev ? Paper_column::get_rank (prev) + 1 : 0;
265 me->set_property ("columns", scm_cons (p->self_scm (), cs));
267 Axis_group_interface::add_element (me, p);
271 apply_tweaks (Grob *g, bool broken)
273 if (bool (g->original_) == broken)
275 SCM tweaks = global_registry_->get_tweaks (g);
276 for (SCM s = tweaks; scm_is_pair (s); s = scm_cdr (s))
278 SCM proc = scm_caar (s);
279 SCM rest = scm_cdar (s);
280 scm_apply_1 (proc, g->self_scm(), rest);
286 System::pre_processing ()
288 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
289 unsmob_grob (scm_car (s))->discretionary_processing ();
291 if (be_verbose_global)
292 progress_indication (_f ("Grob count %d", element_count ()));
294 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
295 unsmob_grob (scm_car (s))->handle_prebroken_dependencies ();
297 fixup_refpoints (get_property ("all-elements"));
300 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
301 apply_tweaks (unsmob_grob (scm_car (s)), false);
303 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
305 Grob *sc = unsmob_grob (scm_car (s));
306 sc->calculate_dependencies (PRECALCED, PRECALCING, ly_symbol2scm ("before-line-breaking-callback"));
309 progress_indication ("\n");
310 progress_indication (_ ("Calculating line breaks..."));
311 progress_indication (" ");
312 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
314 Grob *e = unsmob_grob (scm_car (s));
315 SCM proc = e->get_property ("spacing-procedure");
316 if (ly_c_procedure_p (proc))
317 scm_call_1 (proc, e->self_scm ());
322 System::post_processing ()
324 for (SCM s = get_property ("all-elements"); scm_is_pair (s); s = scm_cdr (s))
326 Grob *g = unsmob_grob (scm_car (s));
328 apply_tweaks (g, true);
330 g->calculate_dependencies (POSTCALCED, POSTCALCING,
331 ly_symbol2scm ("after-line-breaking-callback"));
334 Interval iv (extent (this, Y_AXIS));
336 programming_error ("System with zero extent.");
338 translate_axis (-iv[MAX], Y_AXIS);
340 /* Generate all stencils to trigger font loads.
341 This might seem inefficient, but Stencils are cached per grob
343 SCM all = get_property ("all-elements");
344 all = ly_list_qsort_uniq_x (all);
346 this->get_stencil ();
347 for (SCM s = all; scm_is_pair (s); s = scm_cdr (s))
349 Grob *g = unsmob_grob (scm_car (s));
357 static int const LAYER_COUNT = 3;
362 /* Output stencils in three layers: 0, 1, 2. Default layer: 1. */
363 SCM all = get_property ("all-elements");
365 for (int i = 0; i < LAYER_COUNT; i++)
366 for (SCM s = all; scm_is_pair (s); s = scm_cdr (s))
368 Grob *g = unsmob_grob (scm_car (s));
369 Stencil *stil = g->get_stencil ();
371 /* Skip empty stencils and grobs that are not in this layer. */
373 || robust_scm2int (g->get_property ("layer"), 1) != i)
376 Offset o (g->relative_coordinate (this, X_AXIS),
377 g->relative_coordinate (this, Y_AXIS));
379 Offset extra = robust_scm2offset (g->get_property ("extra-offset"),
381 * Staff_symbol_referencer::staff_space (g);
383 /* Must copy the stencil, for we cannot change the stencil
387 st.translate (o + extra);
389 *tail = scm_cons (st.expr (), SCM_EOL);
390 tail = SCM_CDRLOC(*tail);
393 if (Stencil *me = get_stencil ())
394 exprs = scm_cons (me->expr (), exprs);
396 Interval x (extent (this, X_AXIS));
397 Interval y (extent (this, Y_AXIS));
398 Stencil sys_stencil (Box (x, y),
399 scm_cons (ly_symbol2scm ("combine-stencil"),
402 Interval staff_refpoints;
403 staff_refpoints.set_empty();
404 for (SCM s = get_property ("spaceable-staves");
405 scm_is_pair (s); s = scm_cdr (s))
407 Grob *g = unsmob_grob (scm_car (s));
408 staff_refpoints.add_point (g->relative_coordinate (this, Y_AXIS));
412 Paper_system *pl = new Paper_system (sys_stencil, false);
413 pl->staff_refpoints_ = staff_refpoints;
414 Item * break_point = this->get_bound(LEFT);
415 pl->break_before_penalty_ =
416 robust_scm2double (break_point->get_property ("page-penalty"), 0.0);
418 return scm_gc_unprotect_object (pl->self_scm ());
422 System::broken_col_range (Item const *left, Item const *right) const
424 Link_array<Item> ret;
426 left = left->get_column ();
427 right = right->get_column ();
428 SCM s = get_property ("columns");
430 while (scm_is_pair (s) && scm_car (s) != right->self_scm ())
436 while (scm_is_pair (s) && scm_car (s) != left->self_scm ())
438 Paper_column*c = dynamic_cast<Paper_column*> (unsmob_grob (scm_car (s)));
439 if (Item::is_breakable (c) && !c->system_)
449 /** Return all columns, but filter out any unused columns , since they might
450 disrupt the spacing problem. */
452 System::columns () const
455 = extract_grob_array (this, ly_symbol2scm ("columns"));
457 for (int i = acs.size (); i--;)
459 bool brb = Item::is_breakable (acs[i]);
460 found = found || brb;
463 the last column should be breakable. Weed out any columns that
464 seem empty. We need to retain breakable columns, in case
465 someone forced a breakpoint.
467 if (!found || !Paper_column::is_used (acs[i]))
473 ADD_INTERFACE (System, "system-interface",
474 "This is the toplevel object: each object in a score "
475 "ultimately has a System object as its X and Y parent. ",
476 "all-elements spaceable-staves columns")