Issue 1320: preliminary work - repeat bars defined as context properties

[lilypond.git] / lily / repeat-acknowledge-engraver.cc

diff --git a/lily/repeat-acknowledge-engraver.cc b/lily/repeat-acknowledge-engraver.cc
index 8a95a7ba329b6f1c15efda2c0be960124380c1c1..6d2b508481d062d73dcf7475ad0c9dc0c420915c 100644 (file)
--- a/lily/repeat-acknowledge-engraver.cc
+++ b/lily/repeat-acknowledge-engraver.cc
@@ -1,47 +1,56 @@
-/*   
-  repeat-acknowledge-engraver.cc --  implement Repeat_acknowledge_engraver
-  
-  source file of the GNU LilyPond music typesetter
-  
-  (c) 2000--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
+/*
+  This file is part of LilyPond, the GNU music typesetter.
+
+  Copyright (C) 2000--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+  LilyPond is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  LilyPond is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #include "engraver.hh"
 #include "translator-group.hh"
+#include "context.hh"
 #include "repeated-music.hh"
 
+#include "translator.icc"
 
 /*
   Objective:
 
   -- set and reset repeatCommands, so Unfolded_repeat_iterator knows
-    where to set variables.
+  where to set variables.
 
   -- collect information passed by Unfolded_repeat_iterator for
-   Bar_engraver: writes whichBar property. (TODO: check for
-   interactions with timing engraver.)
-  
- */
+  Bar_engraver: writes whichBar property. (TODO: check for
+  interactions with timing engraver.)
+*/
 class Repeat_acknowledge_engraver : public Engraver
 {
 public:
-  TRANSLATOR_DECLARATIONS(Repeat_acknowledge_engraver);
 
-  virtual void start_translation_timestep ();
-  virtual void process_music ();
+  TRANSLATOR_DECLARATIONS (Repeat_acknowledge_engraver);
+protected:
+  void start_translation_timestep ();
+  void process_music ();
   virtual void initialize ();
-
-  bool first_b_;
 };
 
 void
 Repeat_acknowledge_engraver::initialize ()
 {
-  first_b_ = true;
-  daddy_trans_->set_property ("repeatCommands", SCM_EOL);
+  context ()->set_property ("repeatCommands", SCM_EOL);
 }
 
-
 Repeat_acknowledge_engraver::Repeat_acknowledge_engraver ()
 {
 }
@@ -49,10 +58,10 @@ Repeat_acknowledge_engraver::Repeat_acknowledge_engraver ()
 void
 Repeat_acknowledge_engraver::start_translation_timestep ()
 {
-  first_b_ = true;
-  Translator_group * tr = daddy_trans_->where_defined (ly_symbol2scm ("repeatCommands"));
+  SCM rc;
+  Context *tr = context ()->where_defined (ly_symbol2scm ("repeatCommands"), &rc);
   if (!tr)
-    tr = daddy_trans_;
+    tr = context ();
 
   tr->set_property ("repeatCommands", SCM_EOL);
 }
@@ -62,58 +71,66 @@ Repeat_acknowledge_engraver::process_music ()
 {
   /*
     At the start of a piece, we don't print any repeat bars.
-   */
-  if (now_mom () == Moment (0))
-    return ; 
-  
+  */
+  if (!now_mom ().main_part_)
+    return;
+
   SCM cs = get_property ("repeatCommands");
-  
-  String s = "";
+
+  string s = "";
   bool start = false;
   bool end = false;
   bool volta_found = false;
-  while (gh_pair_p (cs))
+  while (scm_is_pair (cs))
     {
-      SCM command = ly_car (cs);
+      SCM command = scm_car (cs);
       if (command == ly_symbol2scm ("start-repeat"))
-       start = true;
+        start = true;
       else if (command == ly_symbol2scm ("end-repeat"))
-       end = true;
-      else if (gh_pair_p (command) && ly_car (command) == ly_symbol2scm ("volta"))
-       volta_found = true;
-      cs = ly_cdr (cs);      
+        end = true;
+      else if (scm_is_pair (command) && scm_car (command) == ly_symbol2scm ("volta"))
+        volta_found = true;
+      cs = scm_cdr (cs);
     }
 
   if (start && end)
-    s = ":|:";
+    s = robust_scm2string (get_property ("doubleRepeatType"), ":|:");
   else if (start)
-    s = "|:";
+    s = robust_scm2string (get_property ("startRepeatType"), "|:");
   else if (end)
-    s = ":|";
+    s =  robust_scm2string (get_property ("endRepeatType"), ":|");
 
   /*
     TODO: line breaks might be allowed if we set whichBar to "".
-   */
+  */
 
   /*
     We only set the barline if we wouldn't overwrite a previously set
     barline.
-   */
+  */
   SCM wb = get_property ("whichBar");
-  SCM db  = get_property ("defaultBarType");
-  if (!gh_string_p (wb) || gh_equal_p (db, wb))
+  SCM db = get_property ("defaultBarType");
+  if (!scm_is_string (wb) || ly_is_equal (db, wb))
     {
-      if (s != "" || (volta_found && !gh_string_p (wb)))
-       {
-         daddy_trans_->set_property ("whichBar", ly_str02scm (s.to_str0 ()));
-       }
+      if (s != "" || (volta_found && !scm_is_string (wb)))
+        context ()->set_property ("whichBar", ly_string2scm (s));
     }
 }
 
-ENTER_DESCRIPTION(Repeat_acknowledge_engraver,
-/* descr */       "Acknowledge repeated music, and convert the contents of
-repeatCommands ainto an appropriate setting for whichBar",
-/* creats*/       "",
-/* acks  */       "",
-/* reads */       "repeatCommands whichBar",
-/* write */       "");
+ADD_TRANSLATOR (Repeat_acknowledge_engraver,
+                /* doc */
+                "Acknowledge repeated music, and convert the contents of"
+                " @code{repeatCommands} into an appropriate setting for"
+                " @code{whichBar}.",
+
+                /* create */
+                "",
+
+                /* read */
+                "doubleRepeatType "
+                "repeatCommands "
+                "whichBar ",
+
+                /* write */
+                ""
+               );