/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1999--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 1999--2014 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
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"
#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 ()
{
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
{
void
Axis_group_engraver::process_music ()
{
- if (!staffline_)
+ if (!staffline_ && active_)
{
staffline_ = get_spanner ();
Grob *it = unsmob_grob (get_property ("currentCommandColumn"));
staffline_->set_bound (LEFT, it);
}
+ interesting_ = get_property ("keepAliveInterfaces");
}
Spanner *
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 ());
+ }
+ }
}
/*
"VerticalAxisGroup ",
/* read */
- "currentCommandColumn ",
-
+ "currentCommandColumn "
+ "keepAliveInterfaces "
+ "hasAxisGroup ",
+
/* write */
- ""
+ "hasAxisGroup "
);