* flower

[lilypond.git] / lily / sequential-music-iterator.cc

diff --git a/lily/sequential-music-iterator.cc b/lily/sequential-music-iterator.cc
index bfeb3cd9254c92f01d42cf0d7fbb5971907a2e86..e8830fb7e4b0d2fda1e50c8f1981656a8bfe3913 100644 (file)
--- a/lily/sequential-music-iterator.cc
+++ b/lily/sequential-music-iterator.cc
@@ -1,220 +1,20 @@
 /*
-  Sequential_music_iterator.cc -- implement Sequential_music_iterator
+  sequential-music-iterator.cc -- implement Sequential_music_iterator
 
   source file of the GNU LilyPond music typesetter
 
-  (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
 */
-#include "grace-iterator.hh"
-#include "translator-group.hh"
-#include "debug.hh"
-#include "sequential-music-iterator.hh"
-#include "music-list.hh"
-#include "request-chord-iterator.hh"
-
-Sequential_music_iterator::Sequential_music_iterator ()
-{
-  cursor_ = 0;
-  here_mom_ = 0;
-  iter_p_ =0;
-}
-
-Sequential_music_iterator::Sequential_music_iterator (Sequential_music_iterator const &src)
-  : Music_iterator (src)
-{
-  cursor_ = src.cursor_;
-  here_mom_ = src.here_mom_;
-  if (src.iter_p_)
-    iter_p_ = src.iter_p_->clone ();
-  else
-    iter_p_ = 0;
-}
-
-Sequential_music_iterator::~Sequential_music_iterator()
-{
-  if (iter_p_)
-    {
-#if 0
-      if (iter_p_->ok () )
-       music_l_->origin ()->warning (_ ("Must stop before this music ends"));
-#endif
-      delete iter_p_;
-    }
-}
-
-void
-Sequential_music_iterator::construct_children()
-{
-  cursor_ = dynamic_cast<Music_sequence const*> (music_l_)->music_list ();
-  
-  while (gh_pair_p (cursor_ ))
-    {
-      iter_p_ =  get_iterator_p (unsmob_music (gh_car (cursor_)));
-      
-      if (iter_p_->ok()) 
-       {
-         descend_to_child ();
-         return;
-       }
-
-      delete iter_p_ ;
-      iter_p_ =0;
-      cursor_ = gh_cdr (cursor_);
-    }
-}
- /*
-  move to context of child iterator if it is deeper down in the
-  hierarchy.
-  */
 
-void
-Sequential_music_iterator::descend_to_child ()
-{
-       
-  Translator_group  * child_report = child_report = iter_p_->report_to_l ();
-  if (dynamic_cast<Grace_iterator*> (iter_p_))
-    child_report = child_report->daddy_trans_l_;
-    
-  if (report_to_l()->depth_i () < child_report->depth_i ())
-    set_translator (child_report);
-}
-
-
-/*
-  
-  
-  Hier staat in feite: haal alle muziek op (startend op tijd HERE) tot
-  je iets met lengte L > 0 tegenkomt.  Aangezien de preconditie is dat
-  UNTIL het eerstvolgende event is, weet je (per definitie)
-
-  L >= (UNTIL - HERE)
-
-  en iets wat hierna komt (op tijd T) komt dus na tijd
-
-  HERE + L >= HERE + (UNTIL - HERE) = UNTIL
-
-  Dus als je een L>0 tegenkomt, wil je de rest niet meer. Aangezien
-  alles wat tot nu toe hebt gespaard op HERE begint, is dat precies wat
-  je nodig hebt.
+#include "context.hh"
+#include "sequential-music-iterator.hh"
+#include "music.hh"
+#include "warn.hh"
 
-  Misschien kan je deze comment erbij stoppen, en moeten we de
-  eigenschappen van het muziek datatype wat formaliseren, zodat deze
-  redenering helderder is.
-*/
+IMPLEMENT_CTOR_CALLBACK (Sequential_music_iterator);
 
 SCM
-Sequential_music_iterator::get_music (Moment until)const
+Sequential_music_iterator::get_music_list ()const
 {
-  SCM s = SCM_EOL;
-  if (until <  pending_moment ())
-    return s;
-
-  SCM curs = cursor_;
-  Music_iterator * iter = iter_p_->clone ();
-  while (1)
-    {
-      SCM nm = iter->get_music (until - here_mom_);
-      s = gh_append2 (nm, s);
-      
-      Moment m = 0;
-      for (SCM i = nm; gh_pair_p(i); i = gh_cdr (i))
-       m = m >? unsmob_music (gh_car (i))->length_mom ();
-
-      delete iter;
-
-      curs = gh_cdr (curs);
-
-      if (!gh_pair_p (curs) ||  m > Moment (0))
-       return s;
-      else
-       {
-         iter = get_iterator_p (unsmob_music (gh_car (curs)));
-       }      
-    }
-  return s;
-}
-/*
-  Skip events till UNTIL. We don't do any other side effects (such as
-  moving descending to child iterator contexts, because they might
-  depend on \context specs and \translator changes being executed
-    
- */
-void
-Sequential_music_iterator::skip (Moment until)
-{
-  SCM curs = cursor_;
-  while (1)
-    {
-      Moment l =iter_p_->music_length_mom ();
-      if (l >= until - here_mom_)
-       iter_p_->skip (until - here_mom_);
-
-      if (iter_p_->ok ())
-       return ; 
-      
-      here_mom_ = here_mom_ + l;
-      delete iter_p_;
-      iter_p_ =0;
-
-      curs = gh_cdr (curs);
-
-      if (!gh_pair_p (curs))
-       return ;
-      else
-       iter_p_ = get_iterator_p (unsmob_music (gh_car (curs)));
-    }
-}
-
-void
-Sequential_music_iterator::process (Moment until)
-{
-  while (1)
-    {
-      iter_p_->process (until - here_mom_);
-
-      /*
-       if the iter is still OK, there must be events left that have
-       
-         TIME > LEFT
-         
-      */
-      if (iter_p_->ok ())
-       return ;
-
-      here_mom_ += iter_p_->music_length_mom ();
-
-      descend_to_child ();
-      delete iter_p_;
-      iter_p_ =0;
-
-      cursor_ = gh_cdr (cursor_);
-
-      if (!gh_pair_p (cursor_))
-       return ;
-      else
-       {
-         delete iter_p_;
-         iter_p_ = get_iterator_p (unsmob_music (gh_car (cursor_)));
-       }      
-    }
-
-}
-
-Moment
-Sequential_music_iterator::pending_moment() const
-{
-  return iter_p_->pending_moment() + here_mom_;
-}
-
-
-bool
-Sequential_music_iterator::ok() const
-{
-  return iter_p_;
-}
-
-Music_iterator*
-Sequential_music_iterator::try_music_in_children (Music *m) const
-{ 
-  return iter_p_ ? iter_p_->try_music (m) : 0;
+  return get_music ()->get_property ("elements");
 }