X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fengraver-group.cc;h=c431d10ae13cd35e83e6130e1e8bf09a4ac6a405;hb=97a0169312a260933246ab224e4f8b0969871dd5;hp=c69b974a69631aba681068aaadf91bae9789fa1a;hpb=958e95822083954cad00e0a598eb9f12ceba67b9;p=lilypond.git

diff --git a/lily/engraver-group.cc b/lily/engraver-group.cc
index c69b974a69..c431d10ae1 100644
--- a/lily/engraver-group.cc
+++ b/lily/engraver-group.cc
@@ -20,6 +20,7 @@
 #include "context.hh"
 #include "dispatcher.hh"
 #include "engraver-group.hh"
+#include "global-context.hh"
 #include "grob.hh"
 #include "grob-properties.hh"
 #include "paper-score.hh"
@@ -30,19 +31,48 @@ void
 Engraver_group::override (SCM sev)
 {
   Stream_event *ev = unsmob<Stream_event> (sev);
+  SCM sym = ev->get_property ("symbol");
+  Grob_property_info gpi (context (), sym);
 
-  Grob_property_info (context (), ev->get_property ("symbol"))
-    .push (ev->get_property ("property-path"),
-           ev->get_property ("value"));
+  if (to_boolean (ev->get_property ("once")))
+    {
+      SCM token = gpi.temporary_override (ev->get_property ("property-path"),
+                                          ev->get_property ("value"));
+      if (scm_is_pair (token))
+        if (Global_context *g = context ()->get_global_context ())
+          {
+            g->add_finalization (scm_list_4 (ly_context_matched_pop_property_proc,
+                                             context ()->self_scm (),
+                                             sym,
+                                             token));
+          }
+    }
+  else
+    gpi.push (ev->get_property ("property-path"),
+              ev->get_property ("value"));
 }
 
 void
 Engraver_group::revert (SCM sev)
 {
   Stream_event *ev = unsmob<Stream_event> (sev);
+  SCM sym = ev->get_property ("symbol");
+  Grob_property_info gpi (context (), sym);
 
-  Grob_property_info (context (), ev->get_property ("symbol"))
-    .pop (ev->get_property ("property-path"));
+  if (to_boolean (ev->get_property ("once")))
+    {
+      SCM token = gpi.temporary_revert (ev->get_property ("property-path"));
+      if (scm_is_pair (token))
+        if (Global_context *g = context ()->get_global_context ())
+          {
+            g->add_finalization (scm_list_4 (ly_context_matched_pop_property_proc,
+                                             context ()->self_scm (),
+                                             sym,
+                                             token));
+          }
+    }
+  else
+    gpi.pop (ev->get_property ("property-path"));
 }
 
 void
@@ -62,16 +92,13 @@ Engraver_group::disconnect_from_context ()
 }
 
 void
-Engraver_group::announce_grob (Grob_info info)
+Engraver_group::announce_grob (Grob_info info, Direction dir,
+                               Context *reroute_context)
 {
-  announce_infos_.push_back (info);
+  announce_infos_.push_back (Announce_grob_info (info, dir));
 
-  Context *dad_con = context_->get_parent_context ();
-  if (info.rerouting_daddy_context_)
-    {
-      dad_con = info.rerouting_daddy_context_;
-      info.rerouting_daddy_context_ = 0;
-    }
+  Context *dad_con = reroute_context ? reroute_context
+    : context_->get_parent_context ();
 
   Engraver_group *dad_eng
     = dad_con
@@ -79,7 +106,7 @@ Engraver_group::announce_grob (Grob_info info)
       : 0;
 
   if (dad_eng)
-    dad_eng->announce_grob (info);
+    dad_eng->announce_grob (info, dir);
 }
 
 void
@@ -92,7 +119,7 @@ Engraver_group::acknowledge_grobs ()
 
   for (vsize j = 0; j < announce_infos_.size (); j++)
     {
-      Grob_info info = announce_infos_[j];
+      Announce_grob_info info = announce_infos_[j];
 
       SCM meta = info.grob ()->get_property ("meta");
       SCM nm = scm_assoc (name_sym, meta);
@@ -177,12 +204,13 @@ Engraver_group::do_announces ()
   while (pending_grobs ());
 }
 
-Engraver_group::Engraver_group ()
+Preinit_Engraver_group::Preinit_Engraver_group ()
 {
-  acknowledge_hash_table_drul_[LEFT]
-    = acknowledge_hash_table_drul_[RIGHT]
-      = SCM_EOL;
+  acknowledge_hash_table_drul_.set (SCM_EOL, SCM_EOL);
+}
 
+Engraver_group::Engraver_group ()
+{
   acknowledge_hash_table_drul_[LEFT] = scm_c_make_hash_table (61);
   acknowledge_hash_table_drul_[RIGHT] = scm_c_make_hash_table (61);
 }