2 score-engraver.cc -- implement Score_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "all-font-metrics.hh"
15 #include "score-engraver.hh"
16 #include "paper-score.hh"
17 #include "paper-column.hh"
19 #include "paper-def.hh"
20 #include "axis-group-interface.hh"
21 #include "context-def.hh"
23 #include "staff-spacing.hh"
24 #include "note-spacing.hh"
27 TODO: the column creation logic is rather hairy. Revise it.
29 Score_engraver::Score_engraver ()
39 Score_engraver::make_columns ()
47 = updated_grob_properties (this,
48 ly_symbol2scm ("NonMusicalPaperColumn"));
49 SCM pc = updated_grob_properties (this,
50 ly_symbol2scm ("PaperColumn"));
52 set_columns (new Paper_column (nmp), new Paper_column (pc));
54 command_column_->set_grob_property ("breakable", SCM_BOOL_T);
58 i1.grob_ = command_column_;
59 i1.origin_trans_ = this;
64 i2.grob_ = musical_column_;
65 i2.origin_trans_ = this;
72 Score_engraver::prepare (Moment w)
74 Global_translator::prepare (w);
77 TODO: don't make columns when skipTypesetting is true.
81 command_column_->set_grob_property ("when", now_mom_.smobbed_copy ());
82 musical_column_->set_grob_property ("when", now_mom_.smobbed_copy ());
85 Translator_group::start_translation_timestep();
89 Score_engraver::finish ()
92 progress_indication ("[" + to_string (breaks_) + "]");
102 Score_engraver::initialize ()
104 Font_metric *fm = all_fonts_global->find_afm("feta20");
106 error (_f ("can't find `%s'", "feta20.afm")
107 + "\n" +_ ("Fonts have not been installed properly. Aborting"));
109 unsmob_context_def (definition_)->apply_default_property_operations (this);
111 assert (!daddy_trans_);
112 pscore_ = new Paper_score;
113 pscore_->paper_ = dynamic_cast<Paper_def*> (get_output_def ());
115 SCM props = updated_grob_properties (this, ly_symbol2scm ("System"));
117 pscore_->typeset_line (new System (props));
120 system_ = pscore_->system_;
121 system_->set_bound (LEFT, command_column_);
122 command_column_->set_grob_property ("breakable", SCM_BOOL_T);
124 Engraver_group_engraver::initialize ();
129 Score_engraver::finalize ()
131 Engraver_group_engraver::finalize ();
134 = unsmob_grob (get_property ("currentCommandColumn"));
135 system_->set_bound (RIGHT, cc);
136 cc->set_grob_property ("breakable", SCM_BOOL_T);
142 Score_engraver::one_time_step ()
144 if (!to_boolean (get_property ("skipTypesetting")))
150 stop_translation_timestep ();
152 apply_finalizations ();
156 for (int i = announce_infos_.size(); i--;)
158 Grob *g = announce_infos_[i].grob_;
159 if (!dynamic_cast<Paper_column*> (g)) // ugh.
163 + " was created too late!";
164 g->programming_error (msg);
167 announce_infos_.clear ();
171 Score_engraver::announce_grob (Grob_info info)
173 announce_infos_.push (info);
174 pscore_->system_->typeset_grob (info.grob_);
178 Score_engraver::typeset_grob (Grob *elem)
181 programming_error ("Score_engraver: empty elt\n");
187 Score_engraver::typeset_all ()
189 for (int i =0; i < elems_.size (); i++)
191 Grob * elem = elems_[i];
193 if (Spanner *s = dynamic_cast <Spanner *> (elem))
196 do something sensible if spanner not
201 if (!s->get_bound (d))
203 s->set_bound (d, command_column_);
204 /* don't warn for empty/suicided spanners,
205 it makes real warningsinvisible.
206 maybe should be junked earlier? */
210 elem->warning (_f ("unbound spanner `%s'", s->name ().to_str0 ()));
213 while (flip (&d) != LEFT);
215 if (dynamic_cast<Item*> (s->get_parent (Y_AXIS)))
216 programming_error ("Spanner Y-parent is an item.");
220 if (!elem->get_parent (X_AXIS))
222 bool br = to_boolean (elem->get_grob_property ("breakable"));
223 Axis_group_interface::add_element (br ? command_column_ : musical_column_, elem);
227 if (!elem->get_parent (Y_AXIS))
228 Axis_group_interface::add_element (system_, elem);
234 Score_engraver::stop_translation_timestep ()
236 // this generates all items.
237 Engraver_group_engraver::stop_translation_timestep ();
240 if (to_boolean (command_column_->get_grob_property ("breakable")))
244 progress_indication ("[" + to_string (breaks_) + "]");
248 system_->add_column (command_column_);
249 system_->add_column (musical_column_);
256 Score_engraver::set_columns (Paper_column *new_command,
257 Paper_column *new_musical)
259 assert (!command_column_ && !musical_column_);
261 command_column_ = new_command;
262 musical_column_ = new_musical;
265 set_property ("currentCommandColumn", new_command->self_scm ());
270 set_property ("currentMusicalColumn", new_musical->self_scm ());
275 Score_engraver::get_output ()
277 Music_output * o = pscore_;
284 Score_engraver::try_music (Music*r)
286 bool gotcha = Engraver_group_engraver::try_music (r);
288 if (!gotcha && r->is_mus_type ("break-event"))
292 SCM pen = command_column_->get_grob_property ("penalty");
293 Real total_penalty = gh_number_p (pen)
294 ? gh_scm2double (pen)
297 SCM rpen = r->get_mus_property ("penalty");
298 if (gh_number_p (rpen))
299 total_penalty += gh_scm2double (rpen);
301 if (total_penalty > 10000.0) // ugh. arbitrary.
304 command_column_->set_grob_property ("penalty",
305 gh_double2scm (total_penalty));
311 TODO: use property Score.breakForbidden = #t
314 Score_engraver::forbid_breaks ()
320 command_column_->set_grob_property ("breakable", SCM_EOL);
324 Score_engraver::acknowledge_grob (Grob_info gi)
326 if (Staff_spacing::has_interface (gi.grob_))
328 Pointer_group_interface::add_grob (command_column_,
329 ly_symbol2scm ("spacing-wishes"),
332 if (Note_spacing::has_interface (gi.grob_))
334 Pointer_group_interface::add_grob (musical_column_,
335 ly_symbol2scm ("spacing-wishes"),
342 ENTER_DESCRIPTION(Score_engraver,
343 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. System) "
345 "This engraver decides whether a column is breakable. The default is "
346 "that a column is always breakable. However, when every Bar_engraver "
347 "that does not have a barline at a certain point will call "
348 "Score_engraver::forbid_breaks to stop linebreaks. In practice, this "
349 "means that you can make a breakpoint by creating a barline (assuming "
350 "that there are no beams or notes that prevent a breakpoint.) "
352 /* creats*/ "System PaperColumn NonMusicalPaperColumn",
353 /* accepts */ "break-event",
354 /* acks */ "note-spacing-interface staff-spacing-interface",
355 /* reads */ "currentMusicalColumn currentCommandColumn",