use progress_indication to dump font info. Test for this.

[lilypond.git] / lily / time-scaled-music-iterator.cc

diff --git a/lily/time-scaled-music-iterator.cc b/lily/time-scaled-music-iterator.cc
index 89cdd483b9d1cae69ced36820433a1d2607c356c..973a1d8c5eb696d13f802ca1c590b268431fd578 100644 (file)
--- a/lily/time-scaled-music-iterator.cc
+++ b/lily/time-scaled-music-iterator.cc
@@ -1,31 +1,164 @@
-/*   
+/*
   time-scaled-music-iterator.cc -- implement Time_scaled_music_iterator
-  
+
   source file of the GNU LilyPond music typesetter
+
+  (c) 1998--2006 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"
+
+/*
+  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;
+private:
+
+  /* tupletSpannerDuration */
+  Moment spanner_duration_;
+
+  /* next time to add a stop/start pair */
+  Moment next_split_mom_;
   
-  (c) 1998--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  /* Recycle start/stop events if tupletSpannerDuration is set. */
+  Music *start_;
+  Music *stop_;
+
+  bool done_first_;
   
- */
+  Context_handle tuplet_handler_;
+};
 
-#include "time-scaled-music-iterator.hh"
-#include "time-scaled-music.hh"
-#include "event.hh"
-#include "translator-group.hh"
+Time_scaled_music_iterator::Time_scaled_music_iterator ()
+{
+  spanner_duration_ = next_split_mom_ = 0;
+  done_first_ = 0;
+}
+
+
+Moment
+Time_scaled_music_iterator::pending_moment () const
+{
+  if (!done_first_)
+    return Moment (0);
+  
+  Moment next_mom = Music_wrapper_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 (!m.to_bool ())
+  if (!done_first_)
+    {
+      done_first_ = true;
+      descend_to_bottom_context ();
+      report_event (start_);
+      tuplet_handler_.set_context (get_outlet());
+    }
+
+  if (spanner_duration_.to_bool () &&
+      m.main_part_ == next_split_mom_)
+    {
+      descend_to_bottom_context ();
+      stop_->send_to_context (tuplet_handler_.get_outlet ());
+      
+      tuplet_handler_.set_context (get_outlet ());
+      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);
+    }
+
+  Music_wrapper_iterator::process(m);
+  if (child_iter_ && child_iter_->ok ())
+    descend_to_child (child_iter_->get_outlet ());
+  
+  if (m.main_part_ == music_get_length ().main_part_)
+    {
+      stop_->send_to_context (tuplet_handler_.get_outlet ());
+      tuplet_handler_.set_context (0);
+    }
+}
+
+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)
     {
-      Music_iterator *yeah = try_music (get_music ());
-      if (yeah)
-       set_translator (yeah->get_outlet ());
-      else
-       get_music ()->origin ()->warning (_ ("no one to print a tuplet start bracket"));
+      spanner_duration_ = mp->main_part_;
+      next_split_mom_ = spanner_duration_;
     }
 
-  Music_wrapper_iterator::process (m);
+  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
+{
+  if (start_)
+    scm_gc_mark (start_->self_scm ());
+  if (stop_)
+    scm_gc_mark (stop_->self_scm ());
+
+  Music_wrapper_iterator::derived_mark ();
+}
+
 IMPLEMENT_CTOR_CALLBACK (Time_scaled_music_iterator);