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));
56 Grob_info i1 (this, command_column_);
59 Grob_info i2 (this, musical_column_);
65 Score_engraver::prepare (Moment m)
68 TODO: don't make columns when skipTypesetting is true.
72 SCM w = m.smobbed_copy ();
73 command_column_->set_property ("when", w);
74 musical_column_->set_property ("when", w);
76 recurse_over_translators (context (), &Translator::start_translation_timestep, DOWN);
80 Score_engraver::finish ()
83 progress_indication ("[" + to_string (breaks_) + "]");
85 recurse_over_translators (context (), &Translator::finalize, UP);
88 #define MUSIC_FONT "emmentaler-20"
94 Score_engraver::initialize ()
96 Font_metric *fm = all_fonts_global->find_otf (MUSIC_FONT);
99 error (_f ("cannot find `%s'", MUSIC_FONT ".otf")
101 + _ ("Music font has not been installed properly.")
103 + _f ("Search path `%s'", global_path.to_string ().to_str0 ())
108 pscore_ = new Paper_score (dynamic_cast<Output_def *> (get_output_def ()));
110 SCM props = updated_grob_properties (context (), ly_symbol2scm ("System"));
112 Object_key const *sys_key = context ()->get_grob_key ("System");
113 pscore_->typeset_system (new System (props, sys_key));
115 system_ = pscore_->root_system ();
117 system_->set_bound (LEFT, command_column_);
118 command_column_->set_property ("breakable", SCM_BOOL_T);
120 Engraver_group_engraver::initialize ();
124 Score_engraver::finalize ()
126 Score_translator::finalize ();
129 = unsmob_grob (get_property ("currentCommandColumn"));
130 system_->set_bound (RIGHT, cc);
131 cc->set_property ("breakable", SCM_BOOL_T);
137 Score_engraver::one_time_step ()
139 if (!to_boolean (get_property ("skipTypesetting")))
141 recurse_over_translators (context (), &Engraver::process_music, UP);
142 Engraver_group_engraver::do_announces ();
145 recurse_over_translators (context (), &Translator::stop_translation_timestep, UP);
149 Score_engraver::announce_grob (Grob_info info)
151 announce_infos_.push (info);
152 pscore_->root_system ()->typeset_grob (info.grob ());
153 elems_.push (info.grob ());
157 Score_engraver::typeset_all ()
159 for (int i = 0; i < elems_.size (); i++)
161 Grob *elem = elems_[i];
163 if (dynamic_cast<Item *> (elem))
165 if ((!elem->get_parent (X_AXIS)
166 || !unsmob_grob (elem->get_property ("axis-group-parent-X")))
167 && elem != command_column_
168 && elem != musical_column_)
170 bool br = to_boolean (elem->get_property ("breakable"));
171 Axis_group_interface::add_element (br ? command_column_ : musical_column_, elem);
174 if (!elem->get_parent (Y_AXIS))
175 Axis_group_interface::add_element (system_, elem);
181 Score_engraver::stop_translation_timestep ()
183 // this generates all items.
184 Engraver_group_engraver::stop_translation_timestep ();
187 if (to_boolean (command_column_->get_property ("breakable")))
191 progress_indication ("[" + to_string (breaks_) + "]");
199 Score_engraver::set_columns (Paper_column *new_command,
200 Paper_column *new_musical)
202 assert (!command_column_ && !musical_column_);
204 command_column_ = new_command;
205 musical_column_ = new_musical;
208 context ()->set_property ("currentCommandColumn", new_command->self_scm ());
213 context ()->set_property ("currentMusicalColumn", new_musical->self_scm ());
216 system_->add_column (command_column_);
217 system_->add_column (musical_column_);
221 Score_engraver::get_output ()
223 Music_output *o = pscore_;
224 ///FIXME WTF ? pscore_ = 0;
229 Score_engraver::try_music (Music *m)
231 if (Engraver_group_engraver::try_music (m))
234 if (m->is_mus_type ("break-event"))
236 SCM pen = command_column_->get_property ("penalty");
237 Real total_penalty = scm_is_number (pen) ? scm_to_double (pen) : 0.0;
239 SCM mpen = m->get_property ("penalty");
240 if (scm_is_number (mpen))
241 total_penalty += scm_to_double (mpen);
243 command_column_->set_property ("penalty", scm_make_real (total_penalty));
245 /* ugh. arbitrary, hardcoded */
246 if (total_penalty > 10000.0)
249 SCM page_pen = command_column_->get_property ("page-penalty");
250 Real total_pp = scm_is_number (page_pen) ? scm_to_double (page_pen) : 0.0;
251 SCM mpage_pen = m->get_property ("page-penalty");
252 if (scm_is_number (mpage_pen))
253 total_pp += scm_to_double (mpage_pen);
255 command_column_->set_property ("page-penalty", scm_make_real (total_pp));
262 Score_engraver::forbid_breaks ()
265 command_column_->set_property ("breakable", SCM_EOL);
269 Score_engraver::acknowledge_grob (Grob_info gi)
271 if (Staff_spacing::has_interface (gi.grob ()))
273 Pointer_group_interface::add_grob (command_column_,
274 ly_symbol2scm ("spacing-wishes"),
277 if (Note_spacing::has_interface (gi.grob ()))
279 Pointer_group_interface::add_grob (musical_column_,
280 ly_symbol2scm ("spacing-wishes"),
284 if (Axis_group_interface::has_interface (gi.grob ())
285 && gi.grob ()->internal_has_interface (ly_symbol2scm ("vertically-spaceable-interface")))
287 SCM spaceable = get_property ("verticallySpacedContexts");
288 Context *orig = gi.origin_contexts (this)[0];
290 if (scm_memq (ly_symbol2scm (orig->context_name ().to_str0 ()),
291 spaceable) != SCM_BOOL_F)
293 Pointer_group_interface::add_grob (system_,
294 ly_symbol2scm ("spaceable-staves"),
300 ADD_TRANSLATOR (Score_engraver,
301 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. System) "
303 "This engraver decides whether a column is breakable. The default is "
304 "that a column is always breakable. However, when every Bar_engraver "
305 "that does not have a barline at a certain point will call "
306 "Score_engraver::forbid_breaks to stop linebreaks. In practice, this "
307 "means that you can make a breakpoint by creating a barline (assuming "
308 "that there are no beams or notes that prevent a breakpoint.) ",
309 /* creats*/ "System PaperColumn NonMusicalPaperColumn",
310 /* accepts */ "break-event",
311 /* acks */ "note-spacing-interface staff-spacing-interface axis-group-interface",
312 /* reads */ "currentMusicalColumn currentCommandColumn verticallySpacedContexts",