Web-ja: update introduction

[lilypond.git] / lily / trill-spanner-engraver.cc

diff --git a/lily/trill-spanner-engraver.cc b/lily/trill-spanner-engraver.cc
index 1f9d4cf0dcf4a319b9ce1ec0441eb056fff66d4b..ff4612ac666fc6ed8ea4a3790fad427c6e18fe75 100644 (file)
--- a/lily/trill-spanner-engraver.cc
+++ b/lily/trill-spanner-engraver.cc
@@ -1,9 +1,20 @@
 /*
-  trill-spanner-engraver.cc -- implement Trill_spanner_engraver
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 2000--2015 Jan Nieuwenhuizen <janneke@gnu.org>
 
-  (c) 2000--2007 Jan Nieuwenhuizen <janneke@gnu.org>
+  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/>.
 */
 
 /*
@@ -30,8 +41,8 @@ public:
   TRANSLATOR_DECLARATIONS (Trill_spanner_engraver);
 protected:
   virtual void finalize ();
-  DECLARE_TRANSLATOR_LISTENER (trill_span);
-  DECLARE_ACKNOWLEDGER (note_column);
+  void listen_trill_span (Stream_event *);
+  void acknowledge_note_column (Grob_info);
 
   void stop_translation_timestep ();
   void process_music ();
@@ -44,16 +55,15 @@ private:
   void typeset_all ();
 };
 
-Trill_spanner_engraver::Trill_spanner_engraver ()
+Trill_spanner_engraver::Trill_spanner_engraver (Context *c)
+  : Engraver (c)
 {
   finished_ = 0;
   current_event_ = 0;
   span_ = 0;
-  event_drul_[START] = 0;
-  event_drul_[STOP] = 0;
+  event_drul_.set (0, 0);
 }
 
-IMPLEMENT_TRANSLATOR_LISTENER (Trill_spanner_engraver, trill_span);
 void
 Trill_spanner_engraver::listen_trill_span (Stream_event *ev)
 {
@@ -64,45 +74,43 @@ Trill_spanner_engraver::listen_trill_span (Stream_event *ev)
 void
 Trill_spanner_engraver::acknowledge_note_column (Grob_info info)
 {
-  if (span_) {
-    Pointer_group_interface::add_grob (span_,
-                                      ly_symbol2scm ("note-columns"),
-                                      info.grob());
-    add_bound_item (span_, info.grob ());
-  } else if (finished_) {
-    Pointer_group_interface::add_grob (finished_, ly_symbol2scm ("note-columns"),
-                                      info.grob());
-    add_bound_item (finished_, info.grob ());
-  }
+  if (span_)
+    {
+      Pointer_group_interface::add_grob (span_,
+                                         ly_symbol2scm ("note-columns"),
+                                         info.grob ());
+      if (!span_->get_bound (LEFT))
+        add_bound_item (span_, info.grob ());
+    }
+  else if (finished_)
+    {
+      Pointer_group_interface::add_grob (finished_, ly_symbol2scm ("note-columns"),
+                                         info.grob ());
+      if (!finished_->get_bound (RIGHT))
+        add_bound_item (finished_, info.grob ());
+    }
 }
 
 void
 Trill_spanner_engraver::process_music ()
 {
-  if (event_drul_[STOP])
+  if (span_
+      && (event_drul_[STOP] || event_drul_[START]))
     {
-      if (!span_)
-       event_drul_[STOP]->origin ()->warning (_ ("cannot find start of trill spanner"));
-      else
-       {
-         finished_ = span_;
-         announce_end_grob (finished_, SCM_EOL);
-         span_ = 0;
-         current_event_ = 0;
-       }
+      Stream_event *ender = event_drul_[STOP];
+      if (!ender)
+        ender = event_drul_[START];
+      finished_ = span_;
+      announce_end_grob (finished_, ender->self_scm ());
+      span_ = 0;
+      current_event_ = 0;
     }
 
   if (event_drul_[START])
     {
-      if (current_event_)
-       event_drul_[START]->origin ()->warning (_ ("already have a trill spanner"));
-      else
-       {
-         current_event_ = event_drul_[START];
-         span_ = make_spanner ("TrillSpanner", event_drul_[START]->self_scm ());
-         Side_position_interface::set_axis (span_, Y_AXIS);
-         event_drul_[START] = 0;
-       }
+      current_event_ = event_drul_[START];
+      span_ = make_spanner ("TrillSpanner", event_drul_[START]->self_scm ());
+      Side_position_interface::set_axis (span_, Y_AXIS);
     }
 }
 
@@ -112,10 +120,10 @@ Trill_spanner_engraver::typeset_all ()
   if (finished_)
     {
       if (!finished_->get_bound (RIGHT))
-       {
-         Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
-         finished_->set_bound (RIGHT, e);
-       }
+        {
+          Grob *e = unsmob<Grob> (get_property ("currentMusicalColumn"));
+          finished_->set_bound (RIGHT, e);
+        }
       finished_ = 0;
     }
 }
@@ -125,13 +133,12 @@ Trill_spanner_engraver::stop_translation_timestep ()
 {
   if (span_ && !span_->get_bound (LEFT))
     {
-      Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
+      Grob *e = unsmob<Grob> (get_property ("currentMusicalColumn"));
       span_->set_bound (LEFT, e);
     }
 
   typeset_all ();
-  event_drul_[START] = 0;
-  event_drul_[STOP] = 0;
+  event_drul_.set (0, 0);
 }
 
 void
@@ -140,16 +147,30 @@ Trill_spanner_engraver::finalize ()
   typeset_all ();
   if (span_)
     {
-      finished_ = span_;
-      typeset_all ();
+      Grob *e = unsmob<Grob> (get_property ("currentCommandColumn"));
+      span_->set_bound (RIGHT, e);
     }
 }
 
-ADD_ACKNOWLEDGER (Trill_spanner_engraver, note_column);
+
+void
+Trill_spanner_engraver::boot ()
+{
+  ADD_LISTENER (Trill_spanner_engraver, trill_span);
+  ADD_ACKNOWLEDGER (Trill_spanner_engraver, note_column);
+}
 
 ADD_TRANSLATOR (Trill_spanner_engraver,
-               /* doc */ "Create trill spanner from an event.",
-               /* create */
-               "TrillSpanner ",
-               /* read */ "",
-               /* write */ "");
+                /* doc */
+                "Create trill spanner from an event.",
+
+                /* create */
+                "TrillSpanner ",
+
+                /* read */
+                "currentCommandColumn "
+                "currentMusicalColumn ",
+
+                /* write */
+                ""
+               );