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);
53 Score_engraver::prepare (Moment w)
55 Global_translator::prepare (w);
59 command_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
60 musical_column_l_->set_grob_property ("when", now_mom_.smobbed_copy ());
62 Grob_info i1 (command_column_l_);
63 i1.origin_trans_l_ = this;
65 Grob_info i2 (musical_column_l_);
66 i2.origin_trans_l_ = this;
72 Translator_group::start_translation_timestep();
76 Score_engraver::finish ()
79 progress_indication ("[" + to_str (breaks_i_) + "]");
82 removal_processing ();
90 Score_engraver::initialize ()
92 unsmob_translator_def (definition_)->apply_property_operations (this);
94 assert (dynamic_cast<Paper_def *> (output_def_l_));
95 assert (!daddy_trans_l_);
96 pscore_p_ = new Paper_score;
97 pscore_p_->paper_l_ = dynamic_cast<Paper_def*> (output_def_l_);
99 SCM props = get_property ("System");
101 pscore_p_->typeset_line (new System (props));
104 scoreline_l_ = pscore_p_->line_l_;
105 scoreline_l_->set_bound (LEFT, command_column_l_);
106 command_column_l_->set_grob_property ("breakable", SCM_BOOL_T);
108 Engraver_group_engraver::initialize ();
113 Score_engraver::finalize ()
115 Engraver_group_engraver::finalize ();
118 = unsmob_grob (get_property ("currentCommandColumn"));
119 scoreline_l_->set_bound (RIGHT, cc);
120 cc->set_grob_property ("breakable", SCM_BOOL_T);
126 Score_engraver::one_time_step ()
128 if (!to_boolean (get_property ("skipTypesetting")))
134 stop_translation_timestep ();
138 for (int i = announce_info_arr_.size(); i--;)
140 Grob *g = announce_info_arr_[i].grob_l_;
143 + " was created too late!";
144 g->programming_error (msg);
146 announce_info_arr_.clear ();
150 Score_engraver::announce_grob (Grob_info info)
152 announce_info_arr_.push (info);
153 pscore_p_->line_l_->typeset_grob (info.grob_l_);
157 Score_engraver::typeset_grob (Grob *elem_p)
160 programming_error ("Score_engraver: empty elt\n");
163 elem_p_arr_.push (elem_p);
167 Score_engraver::typeset_all ()
169 for (int i =0; i < elem_p_arr_.size (); i++)
171 Grob * elem_p = elem_p_arr_[i];
173 if (Spanner *s = dynamic_cast <Spanner *> (elem_p))
176 do something sensible if spanner not
181 if (!s->get_bound (d))
183 s->set_bound (d, command_column_l_);
184 /* don't warn for empty/suicided spanners,
185 it makes real warningsinvisible.
186 maybe should be junked earlier? */
190 elem_p->warning (_f ("unbound spanner `%s'", s->name ().ch_C ()));
193 while (flip (&d) != LEFT);
195 if (dynamic_cast<Item*> (s->get_parent (Y_AXIS)))
196 programming_error ("Spanner Y-parent is an item.");
200 if (!elem_p->get_parent (X_AXIS))
202 bool br = to_boolean (elem_p->get_grob_property ("breakable"));
203 Axis_group_interface::add_element (br ? command_column_l_ : musical_column_l_, elem_p);
207 if (!elem_p->get_parent (Y_AXIS))
208 Axis_group_interface::add_element (scoreline_l_, elem_p);
210 elem_p_arr_.clear ();
214 Score_engraver::stop_translation_timestep ()
216 // this generates all items.
217 Engraver_group_engraver::stop_translation_timestep ();
220 if (to_boolean (command_column_l_->get_grob_property ("breakable")))
224 progress_indication ("[" + to_str (breaks_i_) + "]");
228 scoreline_l_->add_column (command_column_l_);
229 scoreline_l_->add_column (musical_column_l_);
231 command_column_l_ = 0;
232 musical_column_l_ = 0;
236 Score_engraver::set_columns (Paper_column *new_command_l,
237 Paper_column *new_musical_l)
239 assert (!command_column_l_ && !musical_column_l_);
241 command_column_l_ = new_command_l;
242 musical_column_l_ = new_musical_l;
245 set_property ("currentCommandColumn", new_command_l->self_scm ());
250 set_property ("currentMusicalColumn", new_musical_l->self_scm ());
255 Score_engraver::get_output_p ()
257 Music_output * o = pscore_p_;
263 Score_engraver::try_music (Music*r)
265 bool gotcha = Engraver_group_engraver::try_music (r);
269 if (Break_req* b = dynamic_cast<Break_req *> (r))
274 SCM pen = command_column_l_->get_grob_property ("penalty");
275 Real total_penalty = gh_number_p (pen)
276 ? gh_scm2double (pen)
279 SCM rpen = b->get_mus_property ("penalty");
280 if (gh_number_p (rpen))
281 total_penalty += gh_scm2double (rpen);
283 if (total_penalty > 10000.0) // ugh. arbitrary.
286 command_column_l_->set_grob_property ("penalty",
287 gh_double2scm (total_penalty));
294 TODO: use property Score.breakForbidden = #t
297 Score_engraver::forbid_breaks ()
302 command_column_l_->remove_grob_property ("breakable");
306 Score_engraver::acknowledge_grob (Grob_info gi)
308 if (Staff_spacing::has_interface (gi.grob_l_))
310 Pointer_group_interface::add_grob (command_column_l_,
311 ly_symbol2scm ("spacing-wishes"),
314 if (Note_spacing::has_interface (gi.grob_l_))
316 Pointer_group_interface::add_grob (musical_column_l_,
317 ly_symbol2scm ("spacing-wishes"),
324 ENTER_DESCRIPTION(Score_engraver,
325 /* descr */ "Top level engraver. Takes care of generating columns and the complete system (ie. System)
328 This engraver decides whether a column is breakable. The default is
329 that a column is always breakable. However, when every Bar_engraver
330 that does not have a barline at a certain point will call
331 Score_engraver::forbid_breaks to stop linebreaks. In practice, this
332 means that you can make a breakpoint by creating a barline (assuming
333 that there are no beams or notes that prevent a breakpoint.)
337 /* creats*/ "System PaperColumn NonMusicalPaperColumn",
338 /* acks */ "note-spacing-interface staff-spacing-interface",
339 /* reads */ "currentMusicalColumn currentCommandColumn",