2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2010 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "paper-column-engraver.hh"
22 #include "international.hh"
23 #include "accidental-placement.hh"
24 #include "accidental-interface.hh"
25 #include "axis-group-interface.hh"
27 #include "note-spacing.hh"
28 #include "paper-column.hh"
29 #include "pointer-group-interface.hh"
30 #include "separation-item.hh"
31 #include "staff-spacing.hh"
35 #include "translator.icc"
37 Paper_column_engraver::Paper_column_engraver ()
39 last_moment_.main_part_ = Rational (-1,1);
45 made_columns_ = false;
49 Paper_column_engraver::finalize ()
52 progress_indication ("[" + to_string (breaks_) + "]");
57 SCM m = now_mom ().smobbed_copy ();
58 command_column_->set_property ("when", m);
59 musical_column_->set_property ("when", m);
64 if (!scm_is_symbol (command_column_->get_property ("line-break-permission")))
65 command_column_->set_property ("line-break-permission", ly_symbol2scm ("allow"));
66 system_->set_bound (RIGHT, command_column_);
71 Paper_column_engraver::make_columns ()
76 Paper_column *p1 = make_paper_column ("NonMusicalPaperColumn");
77 Paper_column *p2 = make_paper_column ("PaperColumn");
79 The columns are timestamped with now_mom () in
80 stop_translation_timestep. Cannot happen now, because the
81 first column is sometimes created before now_mom is initialised.
88 Paper_column_engraver::initialize ()
90 system_ = dynamic_cast<System *> (unsmob_grob (get_property ("rootSystem")));
93 system_->set_bound (LEFT, command_column_);
94 command_column_->set_property ("line-break-permission", ly_symbol2scm ("allow"));
98 Paper_column_engraver::acknowledge_item (Grob_info gi)
100 items_.push_back (gi.item ());
104 Paper_column_engraver::acknowledge_staff_spacing (Grob_info gi)
106 Pointer_group_interface::add_grob (command_column_,
107 ly_symbol2scm ("spacing-wishes"),
112 Paper_column_engraver::acknowledge_note_spacing (Grob_info gi)
114 Pointer_group_interface::add_grob (musical_column_,
115 ly_symbol2scm ("spacing-wishes"),
120 Paper_column_engraver::set_columns (Paper_column *new_command,
121 Paper_column *new_musical)
123 command_column_ = new_command;
124 musical_column_ = new_musical;
126 context ()->set_property ("currentCommandColumn", new_command->self_scm ());
129 context ()->set_property ("currentMusicalColumn", new_musical->self_scm ());
131 system_->add_column (command_column_);
132 system_->add_column (musical_column_);
135 IMPLEMENT_TRANSLATOR_LISTENER (Paper_column_engraver, break);
137 Paper_column_engraver::listen_break (Stream_event *ev)
139 break_events_.push_back (ev);
142 IMPLEMENT_TRANSLATOR_LISTENER (Paper_column_engraver, label);
144 Paper_column_engraver::listen_label (Stream_event *ev)
146 label_events_.push_back (ev);
150 Paper_column_engraver::process_music ()
152 for (vsize i = 0; i < break_events_.size (); i++)
155 SCM name_sym = break_events_[i]->get_property ("class");
156 string name = ly_scm2string (scm_symbol_to_string (name_sym));
157 size_t end = name.rfind ("-event");
159 prefix = name.substr (0, end);
162 programming_error ("Paper_column_engraver doesn't know about this break-event");
166 string perm_str = prefix + "-permission";
167 string pen_str = prefix + "-penalty";
169 SCM cur_pen = command_column_->get_property (pen_str.c_str ());
170 SCM pen = break_events_[i]->get_property ("break-penalty");
171 SCM perm = break_events_[i]->get_property ("break-permission");
173 if (scm_is_number (pen))
175 Real new_pen = robust_scm2double (cur_pen, 0.0) + scm_to_double (pen);
176 command_column_->set_property (pen_str.c_str (), scm_from_double (new_pen));
177 command_column_->set_property (perm_str.c_str (), ly_symbol2scm ("allow"));
180 command_column_->set_property (perm_str.c_str (), perm);
183 for (vsize i = 0 ; i < label_events_.size () ; i ++)
185 SCM label = label_events_[i]->get_property ("page-label");
186 SCM labels = command_column_->get_property ("labels");
187 command_column_->set_property ("labels", scm_cons (label, labels));
190 bool start_of_measure = (last_moment_.main_part_ != now_mom ().main_part_
191 && !measure_position (context ()).main_part_);
194 We can't do this in start_translation_timestep (), since time sig
195 changes won't have happened by then.
197 if (start_of_measure)
199 Moment mlen = Moment (measure_length (context ()));
200 Grob *column = unsmob_grob (get_property ("currentCommandColumn"));
202 column->set_property ("measure-length", mlen.smobbed_copy ());
204 programming_error ("No command column?");
209 Paper_column_engraver::stop_translation_timestep ()
211 if (to_boolean (get_property ("skipTypesetting")))
214 SCM m = now_mom ().smobbed_copy ();
215 command_column_->set_property ("when", m);
216 musical_column_->set_property ("when", m);
218 for (vsize i = 0; i < items_.size (); i++)
220 Item *elem = items_[i];
221 Grob *col = Item::is_non_musical (elem) ? command_column_ : musical_column_;
223 if (!elem->get_parent (X_AXIS))
224 elem->set_parent (col, X_AXIS);
225 if (!unsmob_grob (elem->get_object ("axis-group-parent-X")))
226 elem->set_object ("axis-group-parent-X", col->self_scm ());
228 if (Accidental_placement::has_interface (elem))
229 Separation_item::add_conditional_item (col, elem);
230 else if (!Accidental_interface::has_interface (elem))
231 Separation_item::add_item (col, elem);
235 if (to_boolean (get_property ("forbidBreak"))
236 && breaks_) /* don't honour forbidBreak if it occurs on the first moment of a score */
238 command_column_->set_property ("page-turn-permission", SCM_EOL);
239 command_column_->set_property ("page-break-permission", SCM_EOL);
240 command_column_->set_property ("line-break-permission", SCM_EOL);
241 for (vsize i = 0; i < break_events_.size (); i++)
243 SCM perm = break_events_[i]->get_property ("break-permission");
244 if (perm == ly_symbol2scm ("force") || perm == ly_symbol2scm ("allow"))
245 warning (_ ("forced break was overridden by some other event, "
246 "should you be using bar checks?"));
249 else if (Paper_column::is_breakable (command_column_))
254 progress_indication ("[" + to_string (breaks_) + "]");
257 context ()->get_score_context ()->unset_property (ly_symbol2scm ("forbidBreak"));
260 break_events_.clear ();
261 label_events_.clear ();
263 SCM mpos = get_property ("measurePosition");
264 SCM barnum = get_property ("internalBarNumber");
265 if (unsmob_moment (mpos)
266 && scm_is_integer (barnum))
268 SCM where = scm_cons (barnum,
271 command_column_->set_property ("rhythmic-location", where);
272 musical_column_->set_property ("rhythmic-location", where);
277 Paper_column_engraver::start_translation_timestep ()
279 if (!first_ && !to_boolean (get_property ("skipTypesetting")))
282 made_columns_ = true;
286 ADD_ACKNOWLEDGER (Paper_column_engraver, item);
287 ADD_ACKNOWLEDGER (Paper_column_engraver, note_spacing);
288 ADD_ACKNOWLEDGER (Paper_column_engraver, staff_spacing);
290 ADD_TRANSLATOR (Paper_column_engraver,
292 "Take care of generating columns.\n"
294 "This engraver decides whether a column is breakable. The"
295 " default is that a column is always breakable. However,"
296 " every @code{Bar_engraver} that does not have a barline at a"
297 " certain point will set @code{forbidBreaks} in the score"
298 " context to stop line breaks. In practice, this means that"
299 " you can make a break point by creating a bar line (assuming"
300 " that there are no beams or notes that prevent a break"
305 "NonMusicalPaperColumn ",
312 "currentCommandColumn "
313 "currentMusicalColumn "