Erik Sandberg <mandolaerik@gmail.com>
*/
+#include "time-scaled-music-iterator.hh"
+
#include "context.hh"
#include "input.hh"
#include "international.hh"
#include "music.hh"
-#include "sequential-iterator.hh"
-
-/*
- Iterates \times, by sending TupletSpanEvents at the start/end of each
- tuplet bracket. Extra stop/start events are sent at regular
- intervals if tupletSpannerDuration is set.
-*/
-class Time_scaled_music_iterator : public Sequential_iterator
-{
-public:
- DECLARE_SCHEME_CALLBACK (constructor, ());
- /* construction */
- DECLARE_CLASSNAME(Time_scaled_music_iterator);
- Time_scaled_music_iterator ();
-protected:
- virtual SCM get_music_list () const;
- virtual void process (Moment m);
- virtual void construct_children ();
- virtual void derived_mark () const;
- virtual Moment pending_moment () const;
-private:
-
- /* tupletSpannerDuration */
- Moment spanner_duration_;
-
- /* next time to add a stop/start pair */
- Moment next_split_mom_;
-
- /* Recycle start/stop events if tupletSpannerDuration is set. */
- Music *start_;
- Music *stop_;
-};
Time_scaled_music_iterator::Time_scaled_music_iterator ()
{
- spanner_duration_ = next_split_mom_ = 0;
-}
-
-
-Moment
-Time_scaled_music_iterator::pending_moment () const
-{
- Moment next_mom = Sequential_iterator::pending_moment ();
-
- if (spanner_duration_.to_bool () &&
- next_mom.main_part_ > next_split_mom_)
- {
- next_mom = next_split_mom_;
- }
-
- return next_mom;
-}
-
-
-void
-Time_scaled_music_iterator::process (Moment m)
-{
- if (spanner_duration_.to_bool () &&
- m.main_part_ == next_split_mom_)
- {
- report_event (stop_);
- report_event (start_);
-
- next_split_mom_ += spanner_duration_;
- /* avoid sending events twice at the end */
- if (next_split_mom_ == get_music ()->get_length ().main_part_)
- next_split_mom_.set_infinite (1);
- }
- Sequential_iterator::process(m);
-}
-
-void
-Time_scaled_music_iterator::construct_children ()
-{
- /*
- Inheritance trickery:
- Time_scaled_music_iterator::construct_children initialises start_
- and stop_, and calls Sequential_music::construct_children, which
- in turn calls Time_scaled_music_iterator::get_music which reads
- start_ and stop_.
- */
-
- Music *mus = get_music ();
- Input *origin = mus->origin ();
-
- SCM tuplet_symbol = ly_symbol2scm ("TupletSpanEvent");
- SCM start_scm = scm_call_2 (ly_lily_module_constant ("make-span-event"), tuplet_symbol, scm_from_int (START));
- start_ = unsmob_music (start_scm);
- start_->set_spot (*origin);
- start_->set_property ("numerator", mus->get_property ("numerator"));
- start_->set_property ("denominator", mus->get_property ("denominator"));
- start_->set_property ("tweaks", mus->get_property ("tweaks"));
-
-
- SCM stop_scm = scm_call_2 (ly_lily_module_constant ("make-span-event"), tuplet_symbol, scm_from_int (STOP));
- stop_ = unsmob_music (stop_scm);
- stop_->set_spot (*origin);
-
- Moment *mp = unsmob_moment (get_outlet ()->get_property ("tupletSpannerDuration"));
-
- if (mp)
- {
- spanner_duration_ = mp->main_part_;
- next_split_mom_ = spanner_duration_;
- }
-
- Sequential_iterator::construct_children ();
}
SCM
Time_scaled_music_iterator::get_music_list () const
{
Music *mus = get_music ();
- SCM child = mus->get_property ("element");
-
- return scm_list_3 (start_->self_scm (), child, stop_->self_scm ());
-}
-
-void
-Time_scaled_music_iterator::derived_mark () const
-{
- if (start_)
- scm_gc_mark (start_->self_scm ());
- if (stop_)
- scm_gc_mark (stop_->self_scm ());
-
- Sequential_iterator::derived_mark ();
+ Input *origin = mus->origin ();
+ Music *child = unsmob_music (mus->get_property ("element"));
+
+ /* Create tuplet start/stop span events before/after the music */
+ SCM tuplet_symbol = ly_symbol2scm ("TupletEvent");
+ SCM start_event = scm_call_2 (ly_lily_module_constant ("make-span-event"), tuplet_symbol, scm_from_int (START));
+ Music *start = unsmob_music (start_event);
+ start->set_spot (*origin);
+ start->set_property ("numerator", mus->get_property ("numerator"));
+ start->set_property ("denominator", mus->get_property ("denominator"));
+ start_event = scm_call_1 (ly_lily_module_constant ("make-event-chord"), scm_list_1 (start_event));
+ unsmob_music (start_event)->set_spot (*origin);
+
+ SCM stop_event = scm_call_2 (ly_lily_module_constant ("make-span-event"), tuplet_symbol, scm_from_int (STOP));
+ unsmob_music (stop_event)->set_spot (*origin);
+ stop_event = scm_call_1 (ly_lily_module_constant ("make-event-chord"), scm_list_1 (stop_event));
+ unsmob_music (stop_event)->set_spot (*origin);
+
+ return scm_list_3 (start_event, child->self_scm (), stop_event);
}
IMPLEMENT_CTOR_CALLBACK (Time_scaled_music_iterator);