X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fchord-tremolo-iterator.cc;h=c5371a2c4d2c875a8bf907b190e39e25c56a0376;hb=dadf069231fbb3357563070318dc11c5746c97ba;hp=5ddad9598321aebc7a199ec0747910797ec4e99f;hpb=8da6cef580cce3365b219f6aca429b434cb60fcf;p=lilypond.git

diff --git a/lily/chord-tremolo-iterator.cc b/lily/chord-tremolo-iterator.cc
index 5ddad95983..c5371a2c4d 100644
--- a/lily/chord-tremolo-iterator.cc
+++ b/lily/chord-tremolo-iterator.cc
@@ -1,75 +1,71 @@
-/*   
-  chord-tremolo-iterator.cc --  implement Chord_tremolo_iterator
-  
+/*
+  chord-tremolo-iterator.cc -- implement Chord_tremolo_iterator
+
   source file of the GNU LilyPond music typesetter
-  
-  (c) 2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
 
+  (c) 2000--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  		 Erik Sandberg <mandolaerik@gmail.com>
+*/
 
-/*
-  this is culled from various other iterators, but sharing code by subclassing proved to be too difficult.
- */
+#include "chord-tremolo-iterator.hh"
 
 #include "input.hh"
-#include "chord-tremolo-iterator.hh"
+#include "international.hh"
+#include "misc.hh"
 #include "repeated-music.hh"
 
-void
-Chord_tremolo_iterator::construct_children ()
+Chord_tremolo_iterator::Chord_tremolo_iterator ()
 {
-  Repeated_music * rep = dynamic_cast<Repeated_music*> (music_l_);
-  factor_  = Moment (1, rep->repeat_count ());
-  child_iter_p_ = get_iterator_p (rep->body ());
 }
 
-Chord_tremolo_iterator::Chord_tremolo_iterator()
+SCM
+Chord_tremolo_iterator::get_music_list () const
 {
-  factor_ = 1;
-  child_iter_p_ = 0;
-}
+  Music *mus = get_music ();
+  Input *origin = mus->origin ();
+  Moment l = mus->get_length ();
+  Music *body = Repeated_music::body (mus);
+  bool body_is_sequential = body->is_mus_type ("sequential-music");
 
-void
-Chord_tremolo_iterator::process (Moment m)
-{
-  if (!m)
-    {
-      Music_iterator *yeah = try_music (music_l_);
-      if (yeah)
-	set_translator (yeah->report_to_l ());
-      else
-	music_l_->origin ()->warning ( _("no one to print a tremolos"));
-    }
+  int elt_count = body_is_sequential ? scm_ilength (body->get_property ("elements")) : 1;
 
-  child_iter_p_->process (factor_ * m);
-}
+  if (body_is_sequential &&
+      (elt_count != 2
+       && elt_count != 1))
+    mus->origin ()->warning (_f ("expect 2 elements for chord tremolo, found %d", elt_count));
 
+  if (elt_count <= 0)
+    elt_count = 1;
+      
+  Rational total_dur = l.main_part_;
+  Rational note_dur = total_dur / Rational (elt_count * Repeated_music::repeat_count (mus));
 
-Moment
-Chord_tremolo_iterator::pending_moment () const
-{
-  return child_iter_p_->pending_moment () / factor_;
-}
+  SCM tremolo_type = scm_int2num (note_dur.den ());
+  int expected_beaming_ = max (0, (intlog2 (total_dur.den ()) - intlog2 (total_dur.num () + 1) - 1));
 
-bool
-Chord_tremolo_iterator::ok () const
-{
-  return child_iter_p_ && child_iter_p_->ok();
-}
-
-Chord_tremolo_iterator::~Chord_tremolo_iterator ()
-{
-  delete child_iter_p_;
-}
-
-Music_iterator*
-Chord_tremolo_iterator::try_music_in_children (Music  *m) const
-{
-  return child_iter_p_->try_music (m);
+  if (elt_count == 1)
+    {
+      Music *ev = make_music_by_name (ly_symbol2scm ("TremoloEvent"));
+      ev->set_spot (*origin);
+      ev->set_property ("tremolo-type", tremolo_type);
+      return scm_list_2 (ev->unprotect (), body->self_scm ());
+    }
+  else
+    { 
+      SCM tremolo_symbol = ly_symbol2scm ("TremoloSpanEvent");
+      SCM start_event_scm = scm_call_2 (ly_lily_module_constant ("make-span-event"), tremolo_symbol, scm_from_int (START));
+      unsmob_music (start_event_scm)->set_spot (*origin);
+      SCM stop_event_scm = scm_call_2 (ly_lily_module_constant ("make-span-event"), tremolo_symbol, scm_from_int (STOP));
+
+      Music *start_event = unsmob_music (start_event_scm);
+      Music *stop_event = unsmob_music (stop_event_scm);
+      start_event->set_spot (*origin);
+      stop_event->set_spot (*origin);
+      start_event->set_property ("tremolo-type", tremolo_type);
+      start_event->set_property ("expected-beam-count", scm_int2num (expected_beaming_));
+
+      return scm_list_3 (start_event_scm, body->self_scm (), stop_event_scm);
+    }
 }
 
-
-
-IMPLEMENT_CTOR_CALLBACK(Chord_tremolo_iterator);
-
+IMPLEMENT_CTOR_CALLBACK (Chord_tremolo_iterator);