2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1998--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>,
5 Erik Sandberg <mandolaerik@gmail.com>
7 LilyPond is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 LilyPond is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
23 #include "international.hh"
25 #include "music-wrapper-iterator.hh"
26 #include "stream-event.hh"
27 #include "lily-imports.hh"
30 Iterates \times, by sending TupletSpanEvents at the start/end of each
31 tuplet bracket. Extra stop/start events are sent at regular
32 intervals if tupletSpannerDuration is set.
34 class Tuplet_iterator : public Music_wrapper_iterator
37 DECLARE_SCHEME_CALLBACK (constructor, ());
39 DECLARE_CLASSNAME (Tuplet_iterator);
42 virtual void process (Moment m);
43 virtual void construct_children ();
44 virtual void derived_mark () const;
45 virtual Moment pending_moment () const;
47 Music *create_event (Direction d);
51 /* tupletSpannerDuration */
52 Moment spanner_duration_;
54 /* next time to add a stop/start pair */
55 Moment next_split_mom_;
57 /* Recycle start/stop events if tupletSpannerDuration is set. */
58 SCM synthesized_events_;
60 Context_handle tuplet_handler_;
64 Tuplet_iterator::create_event (Direction d)
66 SCM ev_scm = Lily::make_span_event (ly_symbol2scm ("TupletSpanEvent"),
69 Music *mus = get_music ();
71 Music *ev = unsmob<Music> (ev_scm);
72 ev->set_spot (*mus->origin ());
75 ev->set_property ("numerator", mus->get_property ("numerator"));
76 ev->set_property ("denominator", mus->get_property ("denominator"));
77 ev->set_property ("tweaks", mus->get_property ("tweaks"));
78 ev->set_property ("length", spanner_duration_.smobbed_copy ());
81 synthesized_events_ = scm_cons (ev_scm, synthesized_events_);
85 Tuplet_iterator::Tuplet_iterator ()
87 spanner_duration_ = next_split_mom_ = 0;
88 synthesized_events_ = SCM_EOL;
92 Tuplet_iterator::pending_moment () const
94 Moment next_mom = Music_wrapper_iterator::pending_moment ();
95 next_mom = std::min (next_mom, next_split_mom_);
101 Tuplet_iterator::process (Moment m)
103 if (spanner_duration_.to_bool ()
104 && m.main_part_ == next_split_mom_)
106 descend_to_bottom_context ();
107 if (tuplet_handler_.get_context ())
108 create_event (STOP)->send_to_context (tuplet_handler_.get_context ());
110 if (m.main_part_ < music_get_length ().main_part_)
113 std::min (music_get_length () - next_split_mom_, spanner_duration_);
114 tuplet_handler_.set_context (get_outlet ());
115 report_event (create_event (START));
117 next_split_mom_ += spanner_duration_;
120 tuplet_handler_.set_context (0);
122 Music_wrapper_iterator::process (m);
123 if (child_iter_ && child_iter_->ok ())
124 descend_to_child (child_iter_->get_outlet ());
129 Tuplet_iterator::construct_children ()
131 if (Duration *d = unsmob<Duration> (get_music ()->get_property ("duration")))
132 spanner_duration_ = d->get_length ();
134 = unsmob<Moment> (get_outlet ()->get_property ("tupletSpannerDuration")))
135 spanner_duration_ = mp->main_part_;
137 spanner_duration_.set_infinite (1);
139 Music_wrapper_iterator::construct_children ();
141 if (child_iter_ && child_iter_->ok ())
142 descend_to_child (child_iter_->get_outlet ());
146 Tuplet_iterator::derived_mark () const
148 scm_gc_mark (synthesized_events_);
149 Music_wrapper_iterator::derived_mark ();
152 IMPLEMENT_CTOR_CALLBACK (Tuplet_iterator);