* lily/page-turn-engraver.cc (breakable_column): remove an always-true

[lilypond.git] / lily / score-engraver.cc

diff --git a/lily/score-engraver.cc b/lily/score-engraver.cc
index ba80e75bb6ac6052cecd38c0e3b465ba4e47e51a..09d1aa6a0f9e5da00693e33bc319944f0964ba3b 100644 (file)
--- a/lily/score-engraver.cc
+++ b/lily/score-engraver.cc
@@ -11,6 +11,7 @@
 #include "all-font-metrics.hh"
 #include "axis-group-interface.hh"
 #include "context-def.hh"
+#include "dispatcher.hh"
 #include "global-context.hh"
 #include "international.hh"
 #include "main.hh"
@@ -19,6 +20,7 @@
 #include "paper-column-engraver.hh"
 #include "paper-column.hh"
 #include "paper-score.hh"
+#include "stream-event.hh"
 #include "system.hh"
 #include "warn.hh"
 
@@ -33,20 +35,19 @@ Score_engraver::derived_mark () const
 {
   if (pscore_)
     scm_gc_mark (pscore_->self_scm ());
-  Score_translator::derived_mark ();
   Engraver_group::derived_mark ();
 }
 
+IMPLEMENT_LISTENER (Score_engraver, prepare);
 void
-Score_engraver::prepare (Moment m)
+Score_engraver::prepare (SCM)
 {
-  (void) m;
-
   precomputed_recurse_over_translators (context (), START_TRANSLATION_TIMESTEP, DOWN);
 }
 
+IMPLEMENT_LISTENER (Score_engraver, finish);
 void
-Score_engraver::finish ()
+Score_engraver::finish (SCM)
 {
   recurse_over_translators (context (), &Translator::finalize,
                            &Translator_group::finalize,
@@ -75,6 +76,7 @@ Score_engraver::initialize ()
 
   pscore_ = new Paper_score (dynamic_cast<Output_def *> (context ()->get_output_def ()));
   pscore_->unprotect ();
+  context ()->set_property ("output", pscore_->self_scm ());
 
   SCM props = updated_grob_properties (context (), ly_symbol2scm ("System"));
 
@@ -87,16 +89,39 @@ Score_engraver::initialize ()
   Engraver_group::initialize ();
 }
 
+void
+Score_engraver::connect_to_context (Context *c)
+{
+  Engraver_group::connect_to_context (c);
+  
+  Dispatcher *d = c->get_global_context ()->event_source ();
+  d->add_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
+  d->add_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
+  d->add_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
+}
+
+void
+Score_engraver::disconnect_from_context ()
+{
+  Dispatcher *d = context ()->get_global_context ()->event_source ();
+  d->remove_listener (GET_LISTENER (one_time_step), ly_symbol2scm ("OneTimeStep"));
+  d->remove_listener (GET_LISTENER (prepare), ly_symbol2scm ("Prepare"));
+  d->remove_listener (GET_LISTENER (finish), ly_symbol2scm ("Finish"));
+
+  Engraver_group::disconnect_from_context ();
+}
+
 void
 Score_engraver::finalize ()
 {
-  Score_translator::finalize ();
+  Engraver_group::finalize ();
 
   typeset_all ();
 }
 
+IMPLEMENT_LISTENER(Score_engraver, one_time_step);
 void
-Score_engraver::one_time_step ()
+Score_engraver::one_time_step (SCM)
 {
   if (!to_boolean (context ()->get_property ("skipTypesetting")))
     {
@@ -132,22 +157,6 @@ Score_engraver::typeset_all ()
   elems_.clear ();
 }
 
-SCM
-Score_engraver::get_output ()
-{
-  Music_output *o = pscore_;
-  return o->self_scm ();
-}
-
-bool
-Score_engraver::try_music (Music *m)
-{
-  if (Engraver_group::try_music (m))
-    return true;
-
-  return false;
-}
-
 ADD_TRANSLATOR_GROUP (Score_engraver,
                      /* doc */ "Top level engraver. Takes care of generating columns and the complete  system (ie. System) "
                      "\n\n "