2 score-engraver.cc -- implement Score_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "all-font-metrics.hh"
14 #include "score-engraver.hh"
15 #include "paper-score.hh"
16 #include "paper-column.hh"
17 #include "output-def.hh"
18 #include "axis-group-interface.hh"
19 #include "context-def.hh"
20 #include "staff-spacing.hh"
21 #include "note-spacing.hh"
22 #include "global-context.hh"
23 #include "open-type-font.hh"
26 TODO: the column creation logic is rather hairy. Revise it.
28 Score_engraver::Score_engraver ()
38 Score_engraver::make_columns ()
46 = updated_grob_properties (context (),
47 ly_symbol2scm ("NonMusicalPaperColumn"));
49 Object_key const *key1 = context()->get_grob_key ("NonMusicalPaperColumn");
51 SCM pc = updated_grob_properties (context (),
52 ly_symbol2scm ("PaperColumn"));
53 Object_key const *key2 = context()->get_grob_key ("PaperColumn");
54 set_columns (new Paper_column (nmp, key1), new Paper_column (pc, key2));
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 m)
75 TODO: don't make columns when skipTypesetting is true.
79 SCM w = m.smobbed_copy ();
80 command_column_->set_property ("when", w);
81 musical_column_->set_property ("when", w);
83 recurse_over_translators (context (), &Translator::start_translation_timestep, DOWN);
87 Score_engraver::finish ()
90 progress_indication ("[" + to_string (breaks_) + "]");
92 recurse_over_translators (context (), &Translator::finalize, UP);
95 #define MUSIC_FONT "emmentaler-20"
101 Score_engraver::initialize ()
103 Font_metric *fm = all_fonts_global->find_otf (MUSIC_FONT);
106 error (_f ("cannot find `%s'", MUSIC_FONT ".otf")
108 + _ ("Music font has not been installed properly.")
110 + _f ("Search path `%s'", global_path.to_string ().to_str0())
115 pscore_ = new Paper_score;
116 pscore_->layout_ = dynamic_cast<Output_def*> (get_output_def ());
118 SCM props = updated_grob_properties (context (), ly_symbol2scm ("System"));
120 Object_key const *sys_key = context()->get_grob_key ("System");
121 pscore_->typeset_line (new System (props, sys_key));
123 system_ = pscore_->system_;
125 system_->set_bound (LEFT, command_column_);
126 command_column_->set_property ("breakable", SCM_BOOL_T);
128 Engraver_group_engraver::initialize ();
133 Score_engraver::finalize ()
135 Score_translator::finalize ();
138 = unsmob_grob (get_property ("currentCommandColumn"));
139 system_->set_bound (RIGHT, cc);
140 cc->set_property ("breakable", SCM_BOOL_T);
147 Score_engraver::one_time_step ()
149 if (!to_boolean (get_property ("skipTypesetting")))
151 recurse_over_translators (context (), &Engraver::process_music, UP);
152 Engraver_group_engraver::do_announces();
155 recurse_over_translators (context (), &Translator::stop_translation_timestep, UP);
159 Score_engraver::announce_grob (Grob_info info)
161 announce_infos_.push (info);
162 pscore_->system_->typeset_grob (info.grob_);
163 elems_.push (info.grob_);
168 Score_engraver::typeset_all ()
170 for (int i = 0; i < elems_.size (); i++)
172 Grob * elem = elems_[i];
175 if (dynamic_cast<Item*> (elem))
178 (!elem->get_parent (X_AXIS)
179 || !unsmob_grob (elem->get_property ("axis-group-parent-X")))
180 && elem != command_column_
181 && elem != musical_column_
184 bool br = to_boolean (elem->get_property ("breakable"));
185 Axis_group_interface::add_element (br ? command_column_ : musical_column_, elem);
189 if (!elem->get_parent (Y_AXIS))
190 Axis_group_interface::add_element (system_, elem);
196 Score_engraver::stop_translation_timestep ()
198 // this generates all items.
199 Engraver_group_engraver::stop_translation_timestep ();
202 if (to_boolean (command_column_->get_property ("breakable")))
206 progress_indication ("[" + to_string (breaks_) + "]");
215 Score_engraver::set_columns (Paper_column *new_command,
216 Paper_column *new_musical)
218 assert (!command_column_ && !musical_column_);
220 command_column_ = new_command;
221 musical_column_ = new_musical;
224 context ()->set_property ("currentCommandColumn", new_command->self_scm ());
229 context ()->set_property ("currentMusicalColumn", new_musical->self_scm ());
232 system_->add_column (command_column_);
233 system_->add_column (musical_column_);
237 Score_engraver::get_output ()
239 Music_output *o = pscore_;
240 ///FIXME WTF? pscore_ = 0;
245 Score_engraver::try_music (Music *m)
247 if (Engraver_group_engraver::try_music (m))
250 if (m->is_mus_type ("break-event"))
252 SCM pen = command_column_->get_property ("penalty");
253 Real total_penalty = scm_is_number (pen) ? scm_to_double (pen) : 0.0;
255 SCM mpen = m->get_property ("penalty");
256 if (scm_is_number (mpen))
257 total_penalty += scm_to_double (mpen);
259 command_column_->set_property ("penalty", scm_make_real (total_penalty));
261 /* ugh. arbitrary, hardcoded */
262 if (total_penalty > 10000.0)
265 SCM page_pen = command_column_->get_property ("page-penalty");
266 Real total_pp = scm_is_number (page_pen) ? scm_to_double (page_pen) : 0.0;
267 SCM mpage_pen = m->get_property ("page-penalty");
268 if (scm_is_number (mpage_pen))
269 total_pp += scm_to_double (mpage_pen);
271 command_column_->set_property ("page-penalty", scm_make_real (total_pp));
278 Score_engraver::forbid_breaks ()
281 command_column_->set_property ("breakable", SCM_EOL);
285 Score_engraver::acknowledge_grob (Grob_info gi)
287 if (Staff_spacing::has_interface (gi.grob_))
289 Pointer_group_interface::add_grob (command_column_,
290 ly_symbol2scm ("spacing-wishes"),
293 if (Note_spacing::has_interface (gi.grob_))
295 Pointer_group_interface::add_grob (musical_column_,
296 ly_symbol2scm ("spacing-wishes"),
300 if (Axis_group_interface::has_interface (gi.grob_)
301 && gi.grob_->internal_has_interface (ly_symbol2scm ("vertically-spaceable-interface")))
303 SCM spaceable = get_property ("verticallySpacedContexts");
304 Context *orig = gi.origin_contexts (this)[0];
306 if (scm_memq (ly_symbol2scm (orig->context_name ().to_str0()),
307 spaceable) != SCM_BOOL_F)
309 Pointer_group_interface::add_grob (system_,
310 ly_symbol2scm ("spaceable-staves"),
319 ADD_TRANSLATOR (Score_engraver,
320 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. System) "
322 "This engraver decides whether a column is breakable. The default is "
323 "that a column is always breakable. However, when every Bar_engraver "
324 "that does not have a barline at a certain point will call "
325 "Score_engraver::forbid_breaks to stop linebreaks. In practice, this "
326 "means that you can make a breakpoint by creating a barline (assuming "
327 "that there are no beams or notes that prevent a breakpoint.) "
329 /* creats*/ "System PaperColumn NonMusicalPaperColumn",
330 /* accepts */ "break-event",
331 /* acks */ "note-spacing-interface staff-spacing-interface axis-group-interface",
332 /* reads */ "currentMusicalColumn currentCommandColumn verticallySpacedContexts",