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 (ly_symbol2scm ("NonMusicalPaperColumn"))),
44 new Paper_column (get_property (ly_symbol2scm ("PaperColumn"))));
46 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
48 Grob_info i1 (command_column_l_, 0), i2 (musical_column_l_,0);
50 i1.origin_trans_l_ = this;
51 i2.origin_trans_l_ = this;
58 Score_engraver::prepare (Moment w)
60 Global_translator::prepare (w);
63 start_translation_timestep ();
67 Score_engraver::finish ()
70 progress_indication ("[" + to_str (breaks_i_) + "]");
73 removal_processing ();
81 Score_engraver::initialize ()
83 unsmob_translator_def (definition_)->apply_property_operations (this);
85 assert (dynamic_cast<Paper_def *> (output_def_l_));
86 assert (!daddy_trans_l_);
87 pscore_p_ = new Paper_score;
88 pscore_p_->paper_l_ = dynamic_cast<Paper_def*> (output_def_l_);
90 SCM props = get_property (ly_symbol2scm ("LineOfScore"));
92 pscore_p_->typeset_line (new Line_of_score (props));
95 scoreline_l_ = pscore_p_->line_l_;
96 scoreline_l_->set_bound (LEFT, command_column_l_);
97 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
99 Engraver_group_engraver::initialize ();
104 Score_engraver::finalize ()
106 Engraver_group_engraver::finalize ();
109 = unsmob_grob (get_property (ly_symbol2scm ("currentCommandColumn")));
110 scoreline_l_->set_bound (RIGHT, cc);
111 cc->set_grob_property ("breakable", SCM_BOOL_T);
117 Score_engraver::one_time_step ()
119 if (!to_boolean (get_property (ly_symbol2scm("skipTypesetting"))))
126 stop_translation_timestep ();
131 Score_engraver::announce_grob (Grob_info info)
133 announce_info_arr_.push (info);
134 pscore_p_->line_l_->typeset_grob (info.grob_l_);
137 /* All elements are propagated to the top upon announcement. If
138 something was created during one run of
139 Engraver_group_engraver::do_announces, then
140 announce_info_arr_.size () will be nonzero again
142 /* junkme? Done by Engraver_group_engraver::do_announces ()?
146 Score_engraver::do_announces ()
148 Engraver_group_engraver::do_announces ();
153 Score_engraver::typeset_grob (Grob *elem_p)
156 programming_error ("Score_engraver: empty elt\n");
159 elem_p_arr_.push (elem_p);
164 Score_engraver::typeset_all ()
166 for (int i =0; i < elem_p_arr_.size (); i++)
168 Grob * elem_p = elem_p_arr_[i];
170 if (Spanner *s = dynamic_cast <Spanner *> (elem_p))
173 do something sensible if spanner not
178 if (!s->get_bound (d))
180 s->set_bound (d, command_column_l_);
181 /* don't warn for empty/suicided spanners,
182 it makes real warningsinvisible.
183 maybe should be junked earlier? */
184 if (elem_p->immutable_property_alist_ == SCM_EOL)
187 ::warning (_f ("unbound spanner `%s'", s->name ().ch_C ()));
189 } while (flip (&d) != LEFT);
193 if (!elem_p->parent_l (X_AXIS))
195 bool br = to_boolean (elem_p->get_grob_property ("breakable"));
196 Axis_group_interface::add_element (br ? command_column_l_ : musical_column_l_, elem_p);
200 if (!elem_p->parent_l (Y_AXIS))
201 Axis_group_interface::add_element (scoreline_l_, elem_p);
203 elem_p_arr_.clear ();
207 Score_engraver::stop_translation_timestep ()
209 // this generates all items.
210 Engraver_group_engraver::stop_translation_timestep ();
213 if (to_boolean (command_column_l_->get_grob_property ("breakable")))
217 progress_indication ("[" + to_str (breaks_i_) + "]");
220 command_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
221 musical_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
223 scoreline_l_->add_column (command_column_l_);
224 scoreline_l_->add_column (musical_column_l_);
226 command_column_l_ = 0;
227 musical_column_l_ = 0;
231 Score_engraver::set_columns (Paper_column *new_command_l,
232 Paper_column *new_musical_l)
234 assert (!command_column_l_ && !musical_column_l_);
235 command_column_l_ = new_command_l;
236 musical_column_l_ = new_musical_l;
239 set_property ("currentMusicalColumn", new_musical_l->self_scm ());
241 set_property ("currentCommandColumn", new_command_l->self_scm ());
245 Score_engraver::get_output_p ()
247 Music_output * o = pscore_p_;
253 Score_engraver::try_music (Music*r)
255 bool gotcha = Engraver_group_engraver::try_music (r);
259 if (Break_req* b = dynamic_cast<Break_req *> (r))
264 SCM pen = command_column_l_->get_grob_property ("penalty");
265 Real total_penalty = gh_number_p (pen)
266 ? gh_scm2double (pen)
269 SCM rpen = b->get_mus_property ("penalty");
270 if (gh_number_p (rpen))
271 total_penalty += gh_scm2double (rpen);
273 if (total_penalty > 10000.0) // ugh. arbitrary.
276 command_column_l_->set_grob_property ("penalty",
277 gh_double2scm (total_penalty));
284 TODO: use property Score.breakForbidden = #t
288 Score_engraver::forbid_breaks ()
293 command_column_l_->remove_grob_property ("breakable");
299 ENTER_DESCRIPTION(Score_engraver,
300 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. LineOfScore)
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.)
312 /* creats*/ "LineOfScore PaperColumn NonMusicalPaperColumn",
313 /* acks */ "grob-interface",
314 /* reads */ "currentMusicalColumn currentCommandColumn",