X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Faxis-group-engraver.cc;h=8c24ef86a3d6c2f597c9c577250fa14abae26472;hb=5bbfc22fce036b9b69df5e420de93e11da23c05e;hp=e6ad51e6836a53ce9614a675fe6626c04646682e;hpb=13a8e28de140702edbb0629002073972008e17ad;p=lilypond.git

diff --git a/lily/axis-group-engraver.cc b/lily/axis-group-engraver.cc
index e6ad51e683..8c24ef86a3 100644
--- a/lily/axis-group-engraver.cc
+++ b/lily/axis-group-engraver.cc
@@ -1,14 +1,26 @@
 /*
-  axis-group-engraver.cc -- implement Axis_group_engraver
+  This file is part of LilyPond, the GNU music typesetter.
 
-  source file of the GNU LilyPond music typesetter
+  Copyright (C) 1999--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
-  (c) 1999--2006 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 "axis-group-engraver.hh"
+#include "engraver.hh"
 
 #include "axis-group-interface.hh"
+#include "hara-kiri-group-spanner.hh"
 #include "pointer-group-interface.hh"
 #include "context.hh"
 #include "international.hh"
@@ -17,21 +29,70 @@
 
 #include "translator.icc"
 
+/**
+   Put stuff in a Spanner with an Axis_group_interface.
+   Use as last element of a context.
+*/
+class Axis_group_engraver : public Engraver
+{
+protected:
+  bool active_;
+  Spanner *staffline_;
+  SCM interesting_;
+  vector<Grob *> elts_;
+  void process_music ();
+  virtual void initialize ();
+  virtual void finalize ();
+  DECLARE_ACKNOWLEDGER (grob);
+  void process_acknowledged ();
+  virtual Spanner *get_spanner ();
+  virtual void add_element (Grob *);
+  virtual bool must_be_last () const;
+  virtual void derived_mark () const;
+
+public:
+  TRANSLATOR_DECLARATIONS (Axis_group_engraver);
+};
+
+
 Axis_group_engraver::Axis_group_engraver ()
 {
-  must_be_last_ = true;
   staffline_ = 0;
+  interesting_ = SCM_EOL;
+  active_ = false;
+}
+
+void
+Axis_group_engraver::initialize ()
+{
+  active_ = !to_boolean (get_property ("hasAxisGroup"));
+  if (active_)
+    context ()->set_property ("hasAxisGroup", SCM_BOOL_T);
+}
+
+void
+Axis_group_engraver::derived_mark () const
+{
+  scm_gc_mark (interesting_);
+}
+
+
+bool
+Axis_group_engraver::must_be_last () const
+{
+  return true;
 }
 
 void
 Axis_group_engraver::process_music ()
 {
-  if (!staffline_)
+  if (!staffline_ && active_)
     {
       staffline_ = get_spanner ();
-      Grob *it = unsmob_grob (get_property ("currentCommandColumn"));
+      Grob *it = Grob::unsmob (get_property ("currentCommandColumn"));
       staffline_->set_bound (LEFT, it);
     }
+  interesting_ = get_property ("keepAliveInterfaces");
 }
 
 Spanner *
@@ -45,7 +106,7 @@ Axis_group_engraver::finalize ()
 {
   if (staffline_)
     {
-      Grob *it = unsmob_grob (get_property ("currentCommandColumn"));
+      Grob *it = Grob::unsmob (get_property ("currentCommandColumn"));
       staffline_->set_bound (RIGHT, it);
 
       Pointer_group_interface::set_ordered (staffline_, ly_symbol2scm ("elements"), false);
@@ -55,7 +116,17 @@ Axis_group_engraver::finalize ()
 void
 Axis_group_engraver::acknowledge_grob (Grob_info i)
 {
-  elts_.push_back (i.grob ());
+  if (staffline_)
+    elts_.push_back (i.grob ());
+
+  if (staffline_ && to_boolean(staffline_->get_property("remove-empty")))
+    {
+      for (SCM s = interesting_; scm_is_pair (s); s = scm_cdr (s))
+        {
+          if (i.grob ()->internal_has_interface (scm_car (s)))
+            Hara_kiri_group_spanner::add_interesting_item (staffline_, i.grob ());
+        }
+    }
 }
 
 /*
@@ -70,20 +141,20 @@ Axis_group_engraver::process_acknowledged ()
 
   for (vsize i = 0; i < elts_.size (); i++)
     {
-      if (!unsmob_grob (elts_[i]->get_object ("axis-group-parent-Y")))
-	{
-	  if (staffline_->get_parent (Y_AXIS)
-	      && staffline_->get_parent (Y_AXIS) == elts_[i])
-	    {
-	      staffline_->warning (_ ("Axis_group_engraver: vertical group already has a parent"));
-	      staffline_->warning (_ ("are there two Axis_group_engravers?"));
-	      staffline_->warning (_ ("removing this vertical group"));
-	      staffline_->suicide ();
-	      staffline_ = 0;
-	      break;
-	    }
-	  add_element (elts_[i]);
-	}
+      if (!Grob::unsmob (elts_[i]->get_object ("axis-group-parent-Y")))
+        {
+          if (staffline_->get_parent (Y_AXIS)
+              && staffline_->get_parent (Y_AXIS) == elts_[i])
+            {
+              staffline_->warning (_ ("Axis_group_engraver: vertical group already has a parent"));
+              staffline_->warning (_ ("are there two Axis_group_engravers?"));
+              staffline_->warning (_ ("removing this vertical group"));
+              staffline_->suicide ();
+              staffline_ = 0;
+              break;
+            }
+          add_element (elts_[i]);
+        }
     }
   elts_.clear ();
 }
@@ -97,9 +168,18 @@ Axis_group_engraver::add_element (Grob *e)
 ADD_ACKNOWLEDGER (Axis_group_engraver, grob);
 
 ADD_TRANSLATOR (Axis_group_engraver,
-		/* doc */ "Group all objects created in this context in a VerticalAxisGroup spanner.",
-		/* create */ "VerticalAxisGroup",
-		/* read */
-		"currentCommandColumn ",
-
-		/* write */ "");
+                /* doc */
+                "Group all objects created in this context in a"
+                " @code{VerticalAxisGroup} spanner.",
+
+                /* create */
+                "VerticalAxisGroup ",
+
+                /* read */
+                "currentCommandColumn "
+                "keepAliveInterfaces "
+                "hasAxisGroup ",
+                
+                /* write */
+                "hasAxisGroup "
+               );