* lily/ various: Introduce stream events of types Prepare,

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

diff --git a/lily/score-engraver.cc b/lily/score-engraver.cc
index 37fbced6c257940bdf02911cef3a7cedd6902d43..b6c79d01588f57eeff3980742f534a1c8253d2fb 100644 (file)
--- a/lily/score-engraver.cc
+++ b/lily/score-engraver.cc
@@ -6,19 +6,23 @@
   (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
-#include "all-font-metrics.hh"
-#include "warn.hh"
-#include "main.hh"
-#include "system.hh"
 #include "score-engraver.hh"
-#include "paper-score.hh"
-#include "paper-column.hh"
-#include "output-def.hh"
+
+#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"
 #include "open-type-font.hh"
+#include "output-def.hh"
 #include "paper-column-engraver.hh"
+#include "paper-column.hh"
+#include "paper-score.hh"
+#include "stream-event.hh"
+#include "system.hh"
+#include "warn.hh"
 
 Score_engraver::Score_engraver ()
 {
@@ -35,16 +39,16 @@ Score_engraver::derived_mark () const
   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,
@@ -66,7 +70,7 @@ Score_engraver::initialize ()
             + "\n"
             + _ ("Music font has not been installed properly.")
             + "\n"
-            + _f ("Search path `%s'", global_path.to_string ().to_str0 ())
+            + _f ("Search path `%s'", global_path.to_string ().c_str ())
             + "\n"
             + _ ("Aborting"));
     }
@@ -78,12 +82,35 @@ Score_engraver::initialize ()
 
   Object_key const *sys_key = context ()->get_grob_key ("System");
   pscore_->typeset_system (new System (props, sys_key));
+  
   system_ = pscore_->root_system ();
   context ()->set_property ("rootSystem", system_->self_scm ());
 
   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 ()
 {
@@ -92,8 +119,9 @@ Score_engraver::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")))
     {
@@ -108,15 +136,18 @@ Score_engraver::one_time_step ()
 void
 Score_engraver::announce_grob (Grob_info info)
 {
-  announce_infos_.push (info);
-  pscore_->root_system ()->typeset_grob (info.grob ());
-  elems_.push (info.grob ());
+  Engraver_group::announce_grob (info);
+  if (info.start_end () == START)
+    {
+      pscore_->root_system ()->typeset_grob (info.grob ());
+      elems_.push_back (info.grob ());
+    }
 }
 
 void
 Score_engraver::typeset_all ()
 {
-  for (int i = 0; i < elems_.size (); i++)
+  for (vsize i = 0; i < elems_.size (); i++)
     {
       Grob *elem = elems_[i];
 
@@ -133,20 +164,6 @@ Score_engraver::get_output ()
   return o->self_scm ();
 }
 
-/*
-  UGH UGH
-*/
-void
-Score_engraver::forbid_breaks ()
-{
-  for (SCM s = simple_trans_list_; scm_is_pair (s); s = scm_cdr (s))
-    {
-      Translator *tr = unsmob_translator (scm_car (s));
-      if (Paper_column_engraver *pce = dynamic_cast<Paper_column_engraver *> (tr))
-       pce->forbid_breaks ();
-    }
-}
-
 bool
 Score_engraver::try_music (Music *m)
 {
@@ -160,9 +177,9 @@ ADD_TRANSLATOR_GROUP (Score_engraver,
                      /* doc */ "Top level engraver. Takes care of generating columns and the complete  system (ie. System) "
                      "\n\n "
                      "This engraver decides whether a column is breakable. The default is "
-                     "that a column is always breakable. However, when every Bar_engraver "
-                     "that does not have a barline at a certain point will call "
-                     "Score_engraver::forbid_breaks to stop linebreaks.  In practice, this "
+                     "that a column is always breakable. However, every Bar_engraver "
+                     "that does not have a barline at a certain point will set "
+                      "forbidBreaks to stop linebreaks.  In practice, this "
                      "means that you can make a breakpoint by creating a barline (assuming "
                      "that there are no beams or notes that prevent a breakpoint.) ",
                      /* create */
@@ -170,9 +187,11 @@ ADD_TRANSLATOR_GROUP (Score_engraver,
 
                      /* accept */
                      "break-event",
+                     
                      /* read */
                      "currentMusicalColumn "
                      "currentCommandColumn "
                      "verticallySpacedContexts",
+
                      /* write */
                      "");