2 score-engraver.cc -- implement Score_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "line-of-score.hh"
13 #include "score-engraver.hh"
14 #include "paper-score.hh"
15 #include "paper-column.hh"
16 #include "command-request.hh"
17 #include "paper-def.hh"
18 #include "axis-group-interface.hh"
19 #include "translator-def.hh"
23 TODO: the column creation logic is rather hairy. Revise it.
25 Score_engraver::Score_engraver ()
35 Score_engraver::make_columns ()
40 if (!command_column_l_)
41 // || *unsmob_moment (command_column_l_->get_grob_property ("when")) != w)
43 set_columns (new Paper_column (get_property ("NonMusicalPaperColumn")),
44 new Paper_column (get_property ("PaperColumn")));
46 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
48 Grob_info i1 (command_column_l_, SCM_EOL);
49 i1.origin_trans_l_ = this;
51 Grob_info i2 (musical_column_l_, SCM_EOL);
52 i2.origin_trans_l_ = this;
60 Score_engraver::prepare (Moment w)
62 Global_translator::prepare (w);
65 start_translation_timestep ();
69 Score_engraver::finish ()
72 progress_indication ("[" + to_str (breaks_i_) + "]");
75 removal_processing ();
83 Score_engraver::initialize ()
85 unsmob_translator_def (definition_)->apply_property_operations (this);
87 assert (dynamic_cast<Paper_def *> (output_def_l_));
88 assert (!daddy_trans_l_);
89 pscore_p_ = new Paper_score;
90 pscore_p_->paper_l_ = dynamic_cast<Paper_def*> (output_def_l_);
92 SCM props = get_property ("LineOfScore");
94 pscore_p_->typeset_line (new Line_of_score (props));
97 scoreline_l_ = pscore_p_->line_l_;
98 scoreline_l_->set_bound (LEFT, command_column_l_);
99 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
101 Engraver_group_engraver::initialize ();
106 Score_engraver::finalize ()
108 Engraver_group_engraver::finalize ();
111 = unsmob_grob (get_property ("currentCommandColumn"));
112 scoreline_l_->set_bound (RIGHT, cc);
113 cc->set_grob_property ("breakable", SCM_BOOL_T);
119 Score_engraver::one_time_step ()
121 if (!to_boolean (get_property ("skipTypesetting")))
128 stop_translation_timestep ();
133 Score_engraver::announce_grob (Grob_info info)
135 announce_info_arr_.push (info);
136 pscore_p_->line_l_->typeset_grob (info.grob_l_);
139 /* All elements are propagated to the top upon announcement. If
140 something was created during one run of
141 Engraver_group_engraver::do_announces, then
142 announce_info_arr_.size () will be nonzero again
144 /* junkme? Done by Engraver_group_engraver::do_announces ()?
148 Score_engraver::do_announces ()
150 Engraver_group_engraver::do_announces ();
155 Score_engraver::typeset_grob (Grob *elem_p)
158 programming_error ("Score_engraver: empty elt\n");
161 elem_p_arr_.push (elem_p);
166 Score_engraver::typeset_all ()
168 for (int i =0; i < elem_p_arr_.size (); i++)
170 Grob * elem_p = elem_p_arr_[i];
172 if (Spanner *s = dynamic_cast <Spanner *> (elem_p))
175 do something sensible if spanner not
180 if (!s->get_bound (d))
182 s->set_bound (d, command_column_l_);
183 /* don't warn for empty/suicided spanners,
184 it makes real warningsinvisible.
185 maybe should be junked earlier? */
186 if (elem_p->immutable_property_alist_ == SCM_EOL)
189 ::warning (_f ("unbound spanner `%s'", s->name ().ch_C ()));
191 } while (flip (&d) != LEFT);
195 if (!elem_p->get_parent (X_AXIS))
197 bool br = to_boolean (elem_p->get_grob_property ("breakable"));
198 Axis_group_interface::add_element (br ? command_column_l_ : musical_column_l_, elem_p);
202 if (!elem_p->get_parent (Y_AXIS))
203 Axis_group_interface::add_element (scoreline_l_, elem_p);
205 elem_p_arr_.clear ();
209 Score_engraver::stop_translation_timestep ()
211 // this generates all items.
212 Engraver_group_engraver::stop_translation_timestep ();
215 if (to_boolean (command_column_l_->get_grob_property ("breakable")))
219 progress_indication ("[" + to_str (breaks_i_) + "]");
222 command_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
223 musical_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
225 scoreline_l_->add_column (command_column_l_);
226 scoreline_l_->add_column (musical_column_l_);
228 command_column_l_ = 0;
229 musical_column_l_ = 0;
233 Score_engraver::set_columns (Paper_column *new_command_l,
234 Paper_column *new_musical_l)
236 assert (!command_column_l_ && !musical_column_l_);
237 command_column_l_ = new_command_l;
238 musical_column_l_ = new_musical_l;
241 set_property ("currentMusicalColumn", new_musical_l->self_scm ());
243 set_property ("currentCommandColumn", new_command_l->self_scm ());
247 Score_engraver::get_output_p ()
249 Music_output * o = pscore_p_;
255 Score_engraver::try_music (Music*r)
257 bool gotcha = Engraver_group_engraver::try_music (r);
261 if (Break_req* b = dynamic_cast<Break_req *> (r))
266 SCM pen = command_column_l_->get_grob_property ("penalty");
267 Real total_penalty = gh_number_p (pen)
268 ? gh_scm2double (pen)
271 SCM rpen = b->get_mus_property ("penalty");
272 if (gh_number_p (rpen))
273 total_penalty += gh_scm2double (rpen);
275 if (total_penalty > 10000.0) // ugh. arbitrary.
278 command_column_l_->set_grob_property ("penalty",
279 gh_double2scm (total_penalty));
286 TODO: use property Score.breakForbidden = #t
290 Score_engraver::forbid_breaks ()
295 command_column_l_->remove_grob_property ("breakable");
301 ENTER_DESCRIPTION(Score_engraver,
302 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. LineOfScore)
305 This engraver decides whether a column is breakable. The default is
306 that a column is always breakable. However, when every Bar_engraver
307 that does not have a barline at a certain point will call
308 Score_engraver::forbid_breaks to stop linebreaks. In practice, this
309 means that you can make a breakpoint by creating a barline (assuming
310 that there are no beams or notes that prevent a breakpoint.)
314 /* creats*/ "LineOfScore PaperColumn NonMusicalPaperColumn",
315 /* acks */ "grob-interface",
316 /* reads */ "currentMusicalColumn currentCommandColumn",