2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2015 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 "engraver.hh"
22 #include "axis-group-interface.hh"
24 #include "grob-array.hh"
25 #include "international.hh"
26 #include "note-column.hh"
28 #include "side-position-interface.hh"
29 #include "staff-symbol.hh"
30 #include "text-interface.hh"
31 #include "volta-bracket.hh"
34 #include "translator.icc"
37 Create Volta spanners, by reading repeatCommands property, usually
38 set by Volta_repeat_iterator.
40 class Volta_engraver : public Engraver
43 TRANSLATOR_DECLARATIONS (Volta_engraver);
46 DECLARE_ACKNOWLEDGER (bar_line);
48 virtual void derived_mark () const;
49 void stop_translation_timestep ();
50 void process_music ();
53 Spanner *volta_bracket_;
54 Spanner *end_volta_bracket_;
55 Spanner *volta_spanner_;
60 Volta_engraver::derived_mark () const
62 scm_gc_mark (start_string_);
65 Volta_engraver::Volta_engraver ()
67 start_string_ = SCM_EOL;
69 end_volta_bracket_ = 0;
74 Volta_engraver::process_music ()
76 SCM cs = get_property ("repeatCommands");
79 start_string_ = SCM_EOL;
80 while (scm_is_pair (cs))
85 && scm_car (c) == ly_symbol2scm ("volta")
86 && scm_is_pair (scm_cdr (c)))
88 if (scm_cadr (c) == SCM_BOOL_F)
91 start_string_ = scm_cadr (c);
99 SCM l (get_property ("voltaSpannerDuration"));
100 Moment now = now_mom ();
102 bool early_stop = Moment::is_smob (l)
103 && *Moment::unsmob (l) <= now - started_mom_;
105 end = end || early_stop;
108 if (end && !volta_bracket_)
109 /* fixme: be more verbose. */
110 warning (_ ("cannot end volta spanner"));
113 end_volta_bracket_ = volta_bracket_;
118 && (scm_is_string (start_string_) || scm_is_pair (start_string_)))
120 warning (_ ("already have a volta spanner, ending that one prematurely"));
122 if (end_volta_bracket_)
124 warning (_ ("also already have an ended spanner"));
125 warning (_ ("giving up"));
129 end_volta_bracket_ = volta_bracket_;
134 && Text_interface::is_markup (start_string_))
136 started_mom_ = now_mom ();
138 volta_bracket_ = make_spanner ("VoltaBracket", SCM_EOL);
140 volta_bracket_->set_property ("text", start_string_);
143 volta_spanner_ = make_spanner ("VoltaBracketSpanner", SCM_EOL);
145 Axis_group_interface::add_element (volta_spanner_, volta_bracket_);
150 Volta_engraver::acknowledge_bar_line (Grob_info i)
153 Volta_bracket_interface::add_bar (volta_bracket_, i.item ());
154 if (end_volta_bracket_)
155 Volta_bracket_interface::add_bar (end_volta_bracket_, i.item ());
158 Side_position_interface::add_support (volta_spanner_, i.grob ());
162 Volta_engraver::stop_translation_timestep ()
164 Grob *cc = Grob::unsmob (get_property ("currentCommandColumn"));
165 Item *ci = dynamic_cast<Item *> (cc);
167 if (end_volta_bracket_ && !end_volta_bracket_->get_bound (RIGHT))
168 end_volta_bracket_->set_bound (RIGHT, ci);
170 if (volta_spanner_ && end_volta_bracket_)
171 volta_spanner_->set_bound (RIGHT, end_volta_bracket_->get_bound (RIGHT));
173 if (end_volta_bracket_ && !volta_bracket_)
175 for (SCM s = get_property ("stavesFound"); scm_is_pair (s); s = scm_cdr (s))
176 Side_position_interface::add_support (volta_spanner_, Grob::unsmob (scm_car (s)));
180 end_volta_bracket_ = 0;
182 if (volta_bracket_ && !volta_bracket_->get_bound (LEFT))
183 volta_bracket_->set_bound (LEFT, ci);
185 if (volta_spanner_ && volta_bracket_ && !volta_spanner_->get_bound (LEFT))
186 volta_spanner_->set_bound (LEFT, volta_bracket_->get_bound (LEFT));
190 TODO: should attach volta to paper-column if no bar is found.
192 ADD_ACKNOWLEDGER (Volta_engraver, bar_line);
193 ADD_TRANSLATOR (Volta_engraver,
195 "Make volta brackets.",
199 "VoltaBracketSpanner ",
203 "voltaSpannerDuration "