Issue 5167/6: Changes: show \markup xxx = ... \etc assignments

[lilypond.git] / lily / note-spacing-engraver.cc

diff --git a/lily/note-spacing-engraver.cc b/lily/note-spacing-engraver.cc
index 8772ceec7b0daea9b8604cae5c56ee57fe7df129..653aa8db023f80ad804cae7c4d2ab235cbd38e51 100644 (file)
--- a/lily/note-spacing-engraver.cc
+++ b/lily/note-spacing-engraver.cc
@@ -1,10 +1,20 @@
-/* 
-  note-spacing-engraver.cc -- implement Note_spacing_engraver
-  
-  source file of the GNU LilyPond music typesetter
-  
-  (c) 2006 Han-Wen Nienhuys <hanwen@lilypond.org>
-  
+/*
+  This file is part of LilyPond, the GNU music typesetter.
+
+  Copyright (C) 2006--2015 Han-Wen Nienhuys <hanwen@lilypond.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/>.
 */
 
 #include "engraver.hh"
@@ -14,21 +24,24 @@
 #include "item.hh"
 #include "pointer-group-interface.hh"
 
+#include <map>
+
 #include "translator.icc"
 
 class Note_spacing_engraver : public Engraver
 {
+  typedef map <Context *, Grob *> Last_spacing_map;
+  Last_spacing_map last_spacings_;
   Grob *last_spacing_;
-  Context *last_spacing_parent_context_;
-  
+
   Grob *spacing_;
 
   void add_spacing_item (Grob *);
   TRANSLATOR_DECLARATIONS (Note_spacing_engraver);
 protected:
 
-  DECLARE_ACKNOWLEDGER (rhythmic_grob);
-  DECLARE_ACKNOWLEDGER (note_column);
+  void acknowledge_rhythmic_grob (Grob_info);
+  void acknowledge_note_column (Grob_info);
   void stop_translation_timestep ();
   virtual void finalize ();
   virtual void derived_mark () const;
@@ -37,15 +50,16 @@ protected:
 void
 Note_spacing_engraver::derived_mark () const
 {
-  if (last_spacing_parent_context_)
-    scm_gc_mark (last_spacing_parent_context_->self_scm ());
+  for (Last_spacing_map::const_iterator i = last_spacings_.begin ();
+       i != last_spacings_.end (); i++)
+    scm_gc_mark (i->first->self_scm ());
 }
 
-Note_spacing_engraver::Note_spacing_engraver ()
+Note_spacing_engraver::Note_spacing_engraver (Context *c)
+  : Engraver (c)
 {
-  last_spacing_parent_context_ = 0;
-  last_spacing_ = 0;
   spacing_ = 0;
+  last_spacing_ = 0;
 }
 
 void
@@ -55,21 +69,20 @@ Note_spacing_engraver::add_spacing_item (Grob *g)
     {
       spacing_ = make_item ("NoteSpacing", g->self_scm ());
     }
-  
+
   if (spacing_)
     {
       Pointer_group_interface::add_grob (spacing_,
-                                        ly_symbol2scm ("left-items"),
-                                        g);
+                                         ly_symbol2scm ("left-items"),
+                                         g);
 
       if (last_spacing_)
-       Pointer_group_interface::add_grob (last_spacing_,
-                                          ly_symbol2scm ("right-items"),
-                                          g);
+        Pointer_group_interface::add_grob (last_spacing_,
+                                           ly_symbol2scm ("right-items"),
+                                           g);
     }
 }
 
-
 void
 Note_spacing_engraver::acknowledge_note_column (Grob_info gi)
 {
@@ -85,48 +98,63 @@ Note_spacing_engraver::acknowledge_rhythmic_grob (Grob_info gi)
 void
 Note_spacing_engraver::finalize ()
 {
-  if (last_spacing_
-      && last_spacing_parent_context_
-      && last_spacing_parent_context_ == context ()->get_parent_context ()
-      && !unsmob_grob_array (last_spacing_->get_object ("right-items")))
+  Context *parent = context ()->get_parent_context ();
+  Grob *last_spacing = last_spacings_[parent];
+
+  if (last_spacing
+      && !unsmob<Grob_array> (last_spacing->get_object ("right-items")))
     {
-      SCM ccol = get_property ("currentCommandColumn");
-      Grob *column = unsmob_grob (ccol);
-      
-      Pointer_group_interface::add_grob (last_spacing_,
-                                        ly_symbol2scm ("right-items"),
-                                        column);
+      Grob *col = unsmob<Grob> (get_property ("currentCommandColumn"));
+
+      Pointer_group_interface::add_grob (last_spacing,
+                                         ly_symbol2scm ("right-items"),
+                                         col);
     }
 }
 
 void
 Note_spacing_engraver::stop_translation_timestep ()
 {
-  if (last_spacing_
-      && last_spacing_parent_context_
-      && last_spacing_parent_context_ == context ()->get_parent_context ())
+  Context *parent = context ()->get_parent_context ();
+  Grob *last_spacing = last_spacings_[parent];
+
+  if (last_spacing
+      && to_boolean (get_property ("hasStaffSpacing")))
     {
-      Grob *sep = unsmob_grob (get_property ("breakableSeparationItem"));
-      if (sep)
-       Pointer_group_interface::add_grob (last_spacing_,
-                                          ly_symbol2scm ("right-items"),
-                                          sep);
+      Grob *col = unsmob<Grob> (get_property ("currentCommandColumn"));
+      Pointer_group_interface::add_grob (last_spacing,
+                                         ly_symbol2scm ("right-items"),
+                                         col);
     }
-  
+
   if (spacing_)
     {
+      last_spacings_[parent] = spacing_;
       last_spacing_ = spacing_;
-      last_spacing_parent_context_ = context ()->get_parent_context ();
       spacing_ = 0;
     }
 
 }
 
-ADD_ACKNOWLEDGER (Note_spacing_engraver, note_column);
-ADD_ACKNOWLEDGER (Note_spacing_engraver, rhythmic_grob);
+
+void
+Note_spacing_engraver::boot ()
+{
+  ADD_ACKNOWLEDGER (Note_spacing_engraver, note_column);
+  ADD_ACKNOWLEDGER (Note_spacing_engraver, rhythmic_grob);
+}
 
 ADD_TRANSLATOR (Note_spacing_engraver,
-               /* doc */ "Generates NoteSpacing, an object linking horizontal lines for use in spacing.",
-               /* create */ "NoteSpacing",
-               /* read */ "",
-               /* write */ "");
+                /* doc */
+                "Generate @code{NoteSpacing}, an object linking horizontal"
+                " lines for use in spacing.",
+
+                /* create */
+                "NoteSpacing ",
+
+                /* read */
+                "",
+
+                /* write */
+                ""
+               );