+/*
+ hara-kiri-engraver.cc -- implement Hara_kiri_engraver
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+*/
+
+#include "axis-group-engraver.hh"
+#include "hara-kiri-group-spanner.hh"
+#include "rhythmic-head.hh"
+
+class Hara_kiri_engraver : public Axis_group_engraver
+{
+protected:
+ virtual Spanner *get_spanner ();
+ virtual void acknowledge_grob (Grob_info);
+ virtual void add_element (Grob *e);
+ virtual void start_translation_timestep ();
+
+ SCM interesting_;
+public:
+ TRANSLATOR_DECLARATIONS (Hara_kiri_engraver);
+};
+
+void
+Hara_kiri_engraver::start_translation_timestep ()
+{
+ Axis_group_engraver::start_translation_timestep ();
+ interesting_ = get_property ("keepAliveInterfaces");
+}
+
+
+void
+Hara_kiri_engraver::add_element (Grob *e)
+{
+ Hara_kiri_group_spanner::add_element (staffline_, e);
+}
+
+Spanner *
+Hara_kiri_engraver::get_spanner ()
+{
+ Spanner *sp = make_spanner ("RemoveEmptyVerticalGroup", SCM_EOL);
+
+ return sp;
+}
+
+void
+Hara_kiri_engraver::acknowledge_grob (Grob_info i)
+{
+ Axis_group_engraver::acknowledge_grob (i);
+ if (staffline_)
+ {
+ 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 ());
+ }
+ }
+}
+
+Hara_kiri_engraver::Hara_kiri_engraver ()
+{
+ interesting_ = SCM_EOL;
+}
+
+ADD_TRANSLATOR (Hara_kiri_engraver,
+ /* descr */ "Like Axis_group_engraver, but make a hara-kiri spanner, and add "
+ "interesting items (ie. note heads, lyric syllables and normal rests) ",
+ /* creats*/ "RemoveEmptyVerticalGroup",
+ /* accepts */ "",
+ /* acks */ "grob-interface",
+ /* reads */ "keepAliveInterfaces",
+ /* write */ "");
+