+++ /dev/null
-/*
- time-scaled-music-iterator.cc -- implement Time_scaled_music_iterator
-
- source file of the GNU LilyPond music typesetter
-
- (c) 1998--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>,
- Erik Sandberg <mandolaerik@gmail.com>
-*/
-
-#include "context.hh"
-#include "input.hh"
-#include "international.hh"
-#include "music.hh"
-#include "music-wrapper-iterator.hh"
-#include "stream-event.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 Music_wrapper_iterator
-{
-public:
- DECLARE_SCHEME_CALLBACK (constructor, ());
- /* construction */
- DECLARE_CLASSNAME (Time_scaled_music_iterator);
- Time_scaled_music_iterator ();
-protected:
- virtual void process (Moment m);
- virtual void construct_children ();
- virtual void derived_mark () const;
- virtual Moment pending_moment () const;
-
- Music *create_event (Direction d);
-
-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. */
- SCM synthesized_events_;
-
- Context_handle tuplet_handler_;
-};
-
-Music*
-Time_scaled_music_iterator::create_event (Direction d)
-{
- SCM ev_scm = scm_call_2 (ly_lily_module_constant ("make-span-event"),
- ly_symbol2scm ("TupletSpanEvent"),
- scm_from_int (d));
-
- Music *mus = get_music ();
-
- Music *ev = unsmob_music (ev_scm);
- ev->set_spot (*mus->origin ());
- if (d == START)
- {
- ev->set_property ("numerator", mus->get_property ("numerator"));
- ev->set_property ("denominator", mus->get_property ("denominator"));
- ev->set_property ("tweaks", mus->get_property ("tweaks"));
- ev->set_property ("length", spanner_duration_.smobbed_copy ());
- }
-
- synthesized_events_ = scm_cons (ev_scm, synthesized_events_);
- return ev;
-}
-
-
-Time_scaled_music_iterator::Time_scaled_music_iterator ()
-{
- spanner_duration_ = next_split_mom_ = 0;
- synthesized_events_ = SCM_EOL;
-}
-
-
-Moment
-Time_scaled_music_iterator::pending_moment () const
-{
- Moment next_mom = Music_wrapper_iterator::pending_moment ();
- next_mom = min (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_)
- {
- descend_to_bottom_context ();
- if (tuplet_handler_.get_outlet ())
- create_event (STOP)->send_to_context (tuplet_handler_.get_outlet ());
-
- if (m.main_part_ < music_get_length ().main_part_)
- {
- tuplet_handler_.set_context (get_outlet ());
- report_event (create_event (START));
-
- next_split_mom_ += spanner_duration_;
- }
- else
- {
- tuplet_handler_.set_context (0);
- }
- }
- Music_wrapper_iterator::process (m);
- if (child_iter_ && child_iter_->ok ())
- descend_to_child (child_iter_->get_outlet ());
-
-}
-
-void
-Time_scaled_music_iterator::construct_children ()
-{
- spanner_duration_ = music_get_length ();
-
- Moment *mp = unsmob_moment (get_outlet ()->get_property ("tupletSpannerDuration"));
- if (mp)
- spanner_duration_ = min (mp->main_part_, spanner_duration_);
-
- Music_wrapper_iterator::construct_children ();
-
- if (child_iter_ && child_iter_->ok ())
- descend_to_child (child_iter_->get_outlet ());
-}
-
-void
-Time_scaled_music_iterator::derived_mark () const
-{
- scm_gc_mark (synthesized_events_);
- Music_wrapper_iterator::derived_mark ();
-}
-
-IMPLEMENT_CTOR_CALLBACK (Time_scaled_music_iterator);