2 score-engraver.cc -- implement Score_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
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"
21 #include "staff-spacing.hh"
22 #include "note-spacing.hh"
25 TODO: the column creation logic is rather hairy. Revise it.
27 Score_engraver::Score_engraver ()
37 Score_engraver::make_columns ()
42 if (!command_column_l_)
44 set_columns (new Paper_column (get_property ("NonMusicalPaperColumn")),
45 new Paper_column (get_property ("PaperColumn")));
47 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
50 Grob_info i1 (command_column_l_);
51 i1.origin_trans_l_ = this;
53 Grob_info i2 (musical_column_l_);
54 i2.origin_trans_l_ = this;
65 Score_engraver::prepare (Moment w)
67 Global_translator::prepare (w);
70 TODO: don't make columns when skipTypesetting is true.
74 command_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
75 musical_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
78 Translator_group::start_translation_timestep();
82 Score_engraver::finish ()
85 progress_indication ("[" + to_str (breaks_i_) + "]");
88 removal_processing ();
96 Score_engraver::initialize ()
98 unsmob_translator_def (definition_)->apply_property_operations (this);
100 assert (dynamic_cast<Paper_def *> (output_def_l_));
101 assert (!daddy_trans_l_);
102 pscore_p_ = new Paper_score;
103 pscore_p_->paper_l_ = dynamic_cast<Paper_def*> (output_def_l_);
105 SCM props = get_property ("System");
107 pscore_p_->typeset_line (new System (props));
110 scoreline_l_ = pscore_p_->line_l_;
111 scoreline_l_->set_bound (LEFT, command_column_l_);
112 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
114 Engraver_group_engraver::initialize ();
119 Score_engraver::finalize ()
121 Engraver_group_engraver::finalize ();
124 = unsmob_grob (get_property ("currentCommandColumn"));
125 scoreline_l_->set_bound (RIGHT, cc);
126 cc->set_grob_property ("breakable", SCM_BOOL_T);
132 Score_engraver::one_time_step ()
134 if (!to_boolean (get_property ("skipTypesetting")))
140 stop_translation_timestep ();
144 for (int i = announce_info_arr_.size(); i--;)
146 Grob *g = announce_info_arr_[i].grob_l_;
147 if (!dynamic_cast<Paper_column*> (g)) // ugh.
152 + " was created too late!";
153 g->programming_error (msg);
156 announce_info_arr_.clear ();
160 Score_engraver::announce_grob (Grob_info info)
162 announce_info_arr_.push (info);
163 pscore_p_->line_l_->typeset_grob (info.grob_l_);
167 Score_engraver::typeset_grob (Grob *elem_p)
170 programming_error ("Score_engraver: empty elt\n");
173 elem_p_arr_.push (elem_p);
177 Score_engraver::typeset_all ()
179 for (int i =0; i < elem_p_arr_.size (); i++)
181 Grob * elem_p = elem_p_arr_[i];
183 if (Spanner *s = dynamic_cast <Spanner *> (elem_p))
186 do something sensible if spanner not
191 if (!s->get_bound (d))
193 s->set_bound (d, command_column_l_);
194 /* don't warn for empty/suicided spanners,
195 it makes real warningsinvisible.
196 maybe should be junked earlier? */
200 elem_p->warning (_f ("unbound spanner `%s'", s->name ().ch_C ()));
203 while (flip (&d) != LEFT);
205 if (dynamic_cast<Item*> (s->get_parent (Y_AXIS)))
206 programming_error ("Spanner Y-parent is an item.");
210 if (!elem_p->get_parent (X_AXIS))
212 bool br = to_boolean (elem_p->get_grob_property ("breakable"));
213 Axis_group_interface::add_element (br ? command_column_l_ : musical_column_l_, elem_p);
217 if (!elem_p->get_parent (Y_AXIS))
218 Axis_group_interface::add_element (scoreline_l_, elem_p);
220 elem_p_arr_.clear ();
224 Score_engraver::stop_translation_timestep ()
226 // this generates all items.
227 Engraver_group_engraver::stop_translation_timestep ();
230 if (to_boolean (command_column_l_->get_grob_property ("breakable")))
234 progress_indication ("[" + to_str (breaks_i_) + "]");
238 scoreline_l_->add_column (command_column_l_);
239 scoreline_l_->add_column (musical_column_l_);
241 command_column_l_ = 0;
242 musical_column_l_ = 0;
246 Score_engraver::set_columns (Paper_column *new_command_l,
247 Paper_column *new_musical_l)
249 assert (!command_column_l_ && !musical_column_l_);
251 command_column_l_ = new_command_l;
252 musical_column_l_ = new_musical_l;
255 set_property ("currentCommandColumn", new_command_l->self_scm ());
260 set_property ("currentMusicalColumn", new_musical_l->self_scm ());
265 Score_engraver::get_output_p ()
267 Music_output * o = pscore_p_;
273 Score_engraver::try_music (Music*r)
275 bool gotcha = Engraver_group_engraver::try_music (r);
279 if (Break_req* b = dynamic_cast<Break_req *> (r))
284 SCM pen = command_column_l_->get_grob_property ("penalty");
285 Real total_penalty = gh_number_p (pen)
286 ? gh_scm2double (pen)
289 SCM rpen = b->get_mus_property ("penalty");
290 if (gh_number_p (rpen))
291 total_penalty += gh_scm2double (rpen);
293 if (total_penalty > 10000.0) // ugh. arbitrary.
296 command_column_l_->set_grob_property ("penalty",
297 gh_double2scm (total_penalty));
304 TODO: use property Score.breakForbidden = #t
307 Score_engraver::forbid_breaks ()
312 if (command_column_l_)
313 command_column_l_->remove_grob_property ("breakable");
317 Score_engraver::acknowledge_grob (Grob_info gi)
319 if (Staff_spacing::has_interface (gi.grob_l_))
321 Pointer_group_interface::add_grob (command_column_l_,
322 ly_symbol2scm ("spacing-wishes"),
325 if (Note_spacing::has_interface (gi.grob_l_))
327 Pointer_group_interface::add_grob (musical_column_l_,
328 ly_symbol2scm ("spacing-wishes"),
335 ENTER_DESCRIPTION(Score_engraver,
336 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. System)
339 This engraver decides whether a column is breakable. The default is
340 that a column is always breakable. However, when every Bar_engraver
341 that does not have a barline at a certain point will call
342 Score_engraver::forbid_breaks to stop linebreaks. In practice, this
343 means that you can make a breakpoint by creating a barline (assuming
344 that there are no beams or notes that prevent a breakpoint.)
348 /* creats*/ "System PaperColumn NonMusicalPaperColumn",
349 /* acks */ "note-spacing-interface staff-spacing-interface",
350 /* reads */ "currentMusicalColumn currentCommandColumn",