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);
71 command_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
72 musical_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
74 Translator_group::start_translation_timestep();
78 Score_engraver::finish ()
81 progress_indication ("[" + to_str (breaks_i_) + "]");
84 removal_processing ();
92 Score_engraver::initialize ()
94 unsmob_translator_def (definition_)->apply_property_operations (this);
96 assert (dynamic_cast<Paper_def *> (output_def_l_));
97 assert (!daddy_trans_l_);
98 pscore_p_ = new Paper_score;
99 pscore_p_->paper_l_ = dynamic_cast<Paper_def*> (output_def_l_);
101 SCM props = get_property ("System");
103 pscore_p_->typeset_line (new System (props));
106 scoreline_l_ = pscore_p_->line_l_;
107 scoreline_l_->set_bound (LEFT, command_column_l_);
108 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
110 Engraver_group_engraver::initialize ();
115 Score_engraver::finalize ()
117 Engraver_group_engraver::finalize ();
120 = unsmob_grob (get_property ("currentCommandColumn"));
121 scoreline_l_->set_bound (RIGHT, cc);
122 cc->set_grob_property ("breakable", SCM_BOOL_T);
128 Score_engraver::one_time_step ()
130 if (!to_boolean (get_property ("skipTypesetting")))
136 stop_translation_timestep ();
140 for (int i = announce_info_arr_.size(); i--;)
142 Grob *g = announce_info_arr_[i].grob_l_;
145 + " was created too late!";
146 g->programming_error (msg);
148 announce_info_arr_.clear ();
152 Score_engraver::announce_grob (Grob_info info)
154 announce_info_arr_.push (info);
155 pscore_p_->line_l_->typeset_grob (info.grob_l_);
159 Score_engraver::typeset_grob (Grob *elem_p)
162 programming_error ("Score_engraver: empty elt\n");
165 elem_p_arr_.push (elem_p);
169 Score_engraver::typeset_all ()
171 for (int i =0; i < elem_p_arr_.size (); i++)
173 Grob * elem_p = elem_p_arr_[i];
175 if (Spanner *s = dynamic_cast <Spanner *> (elem_p))
178 do something sensible if spanner not
183 if (!s->get_bound (d))
185 s->set_bound (d, command_column_l_);
186 /* don't warn for empty/suicided spanners,
187 it makes real warningsinvisible.
188 maybe should be junked earlier? */
192 elem_p->warning (_f ("unbound spanner `%s'", s->name ().ch_C ()));
195 while (flip (&d) != LEFT);
197 if (dynamic_cast<Item*> (s->get_parent (Y_AXIS)))
198 programming_error ("Spanner Y-parent is an item.");
202 if (!elem_p->get_parent (X_AXIS))
204 bool br = to_boolean (elem_p->get_grob_property ("breakable"));
205 Axis_group_interface::add_element (br ? command_column_l_ : musical_column_l_, elem_p);
209 if (!elem_p->get_parent (Y_AXIS))
210 Axis_group_interface::add_element (scoreline_l_, elem_p);
212 elem_p_arr_.clear ();
216 Score_engraver::stop_translation_timestep ()
218 // this generates all items.
219 Engraver_group_engraver::stop_translation_timestep ();
222 if (to_boolean (command_column_l_->get_grob_property ("breakable")))
226 progress_indication ("[" + to_str (breaks_i_) + "]");
230 scoreline_l_->add_column (command_column_l_);
231 scoreline_l_->add_column (musical_column_l_);
233 command_column_l_ = 0;
234 musical_column_l_ = 0;
238 Score_engraver::set_columns (Paper_column *new_command_l,
239 Paper_column *new_musical_l)
241 assert (!command_column_l_ && !musical_column_l_);
243 command_column_l_ = new_command_l;
244 musical_column_l_ = new_musical_l;
247 set_property ("currentCommandColumn", new_command_l->self_scm ());
252 set_property ("currentMusicalColumn", new_musical_l->self_scm ());
257 Score_engraver::get_output_p ()
259 Music_output * o = pscore_p_;
265 Score_engraver::try_music (Music*r)
267 bool gotcha = Engraver_group_engraver::try_music (r);
271 if (Break_req* b = dynamic_cast<Break_req *> (r))
276 SCM pen = command_column_l_->get_grob_property ("penalty");
277 Real total_penalty = gh_number_p (pen)
278 ? gh_scm2double (pen)
281 SCM rpen = b->get_mus_property ("penalty");
282 if (gh_number_p (rpen))
283 total_penalty += gh_scm2double (rpen);
285 if (total_penalty > 10000.0) // ugh. arbitrary.
288 command_column_l_->set_grob_property ("penalty",
289 gh_double2scm (total_penalty));
296 TODO: use property Score.breakForbidden = #t
299 Score_engraver::forbid_breaks ()
304 command_column_l_->remove_grob_property ("breakable");
308 Score_engraver::acknowledge_grob (Grob_info gi)
310 if (Staff_spacing::has_interface (gi.grob_l_))
312 Pointer_group_interface::add_grob (command_column_l_,
313 ly_symbol2scm ("spacing-wishes"),
316 if (Note_spacing::has_interface (gi.grob_l_))
318 Pointer_group_interface::add_grob (musical_column_l_,
319 ly_symbol2scm ("spacing-wishes"),
326 ENTER_DESCRIPTION(Score_engraver,
327 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. System)
330 This engraver decides whether a column is breakable. The default is
331 that a column is always breakable. However, when every Bar_engraver
332 that does not have a barline at a certain point will call
333 Score_engraver::forbid_breaks to stop linebreaks. In practice, this
334 means that you can make a breakpoint by creating a barline (assuming
335 that there are no beams or notes that prevent a breakpoint.)
339 /* creats*/ "System PaperColumn NonMusicalPaperColumn",
340 /* acks */ "note-spacing-interface staff-spacing-interface",
341 /* reads */ "currentMusicalColumn currentCommandColumn",