X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fsequential-music-iterator.cc;h=e8830fb7e4b0d2fda1e50c8f1981656a8bfe3913;hb=f0b7ccb46df75c89e1f69dd4ef42ab370f1847fe;hp=7260e3eb83f1e49c0d946489607239c1abc64496;hpb=7181c77e5d46a271f5f76e99bee7f844611e23e4;p=lilypond.git

diff --git a/lily/sequential-music-iterator.cc b/lily/sequential-music-iterator.cc
index 7260e3eb83..e8830fb7e4 100644
--- a/lily/sequential-music-iterator.cc
+++ b/lily/sequential-music-iterator.cc
@@ -1,213 +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"
-
-/*
-  Invariant for the data structure.
-
-
-  if (gh_pair_p (cursor_))
-    iter_p_->music_l_ == unsmob_music (gh_car (cursor_))
-  else
-    iter_p_ == 0;
-
-  The length of musiclist from start to up to cursor_ (cursor_ not
-  including), is summed
-
-  here_mom_  = sum (length (musiclist [start ... cursor> ))  %)  
-  
- */
-
-
-Sequential_music_iterator::Sequential_music_iterator ()
-{
-  cursor_ = SCM_EOL;
-  here_mom_ = Moment (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()
-{
-  delete iter_p_;
-}
-
-void
-Sequential_music_iterator::construct_children()
-{
-  cursor_ = dynamic_cast<Music_sequence const*> (music_l_)->music_list ();
-
-  iter_p_ = gh_pair_p (cursor_) ?  get_iterator_p (unsmob_music (gh_car (cursor_))) : 0;
-  while (iter_p_ && !iter_p_->ok ())
-    {
-      next_element ();
-    }
-
-  /*
-    iter_p_->ok () is tautology, but what the heck.
-   */
-  if (iter_p_ && iter_p_->ok()) 
-    descend_to_child ();
-
-}
 
+#include "context.hh"
+#include "sequential-music-iterator.hh"
+#include "music.hh"
+#include "warn.hh"
 
-/*
-  maintain invariants: change cursor, iter and here_mom_ in one fell
-  swoop.
-*/
-void
-Sequential_music_iterator::next_element ()
-{
-  here_mom_ += iter_p_->music_length_mom ();
-  delete iter_p_;
-  cursor_ = gh_cdr (cursor_);
-
-  if (gh_pair_p (cursor_))
-    iter_p_ = get_iterator_p (unsmob_music (gh_car (cursor_)));
-  else
-    iter_p_ = 0;
-}
-
-/*
-  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);
-}
-
-
-/*
-  Retrieve all music (starting at HERE), until a music with length L >
-  0 is found.  From the precondition, we know that UNTIL is later than
-  the earliest event. Hence we know
-  
-  L >= (UNTIL - HERE)
-
-  so something that comes after this thing with L > 0 happens after
-
-  HERE + L >= HERE + (UNTIL - HERE) = UNTIL
-
-  Hence all events after the one with L>0 are uninteresting, so we
-  ignore them.
-  
-*/
+IMPLEMENT_CTOR_CALLBACK (Sequential_music_iterator);
 
 SCM
-Sequential_music_iterator::get_music (Moment until)const
-{
-  SCM s = SCM_EOL;
-  if (until <  pending_moment ())
-    return s;
-
-  Sequential_music_iterator * me =
-    dynamic_cast<Sequential_music_iterator*> (clone ());
-  while (me->ok ())
-    {
-      SCM nm = me->iter_p_->get_music (until - me->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 ();
-
-      if (m > Moment (0))
-	break ;
-      else
-	me->next_element ();
-    }
-  delete me;
-  
-  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)
+Sequential_music_iterator::get_music_list ()const
 {
-  while (ok ())
-    {
-      Moment l =iter_p_->music_length_mom ();
-      if (l >= until - here_mom_)
-	iter_p_->skip (until - here_mom_);
-
-      if (iter_p_->ok ())
-	return ; 
-
-      next_element ();
-    }
-}
-
-void
-Sequential_music_iterator::process (Moment until)
-{
-  while (iter_p_)
-    {
-      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 ;
-
-      descend_to_child ();
-      next_element ();
-    }
-}
-
-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");
 }