+/*
+ pitched-trill-engraver.cc -- implement Pitched_trill_engraver
+
+ source file of the GNU LilyPond music typesetter
+
+ (c) 2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
+
+*/
+
+#include "engraver.hh"
+
+#include "group-interface.hh"
+#include "axis-group-interface.hh"
+#include "context.hh"
+#include "note-head.hh"
+#include "item.hh"
+#include "side-position-interface.hh"
+#include "pitch.hh"
+#include "warn.hh"
+
+class Pitched_trill_engraver : public Engraver
+{
+
+public:
+ TRANSLATOR_DECLARATIONS(Pitched_trill_engraver);
+
+protected:
+ virtual void acknowledge_grob (Grob_info);
+ virtual void process_music ();
+ virtual bool try_music (Music*);
+ virtual void stop_translation_timestep ();
+private:
+ Item *trill_head_;
+ Item *trill_group_;
+ Item *trill_accidental_;
+
+ Link_array<Grob> heads_;
+
+ void make_trill (Music *);
+};
+
+
+Pitched_trill_engraver::Pitched_trill_engraver ()
+{
+ trill_head_ = 0;
+ trill_group_ = 0;
+ trill_accidental_ = 0;
+}
+
+void
+Pitched_trill_engraver::acknowledge_grob (Grob_info info)
+{
+ Music *mus = info.music_cause ();
+
+ if (Note_head::has_interface (info.grob ()))
+ {
+ heads_.push (info.grob ());
+ }
+ else if (mus
+ && mus->is_mus_type ("trill-span-event")
+ && to_dir (mus->get_property ("span-direction")) == START
+ && unsmob_pitch (mus->get_property ("trill-pitch")))
+ {
+ make_trill (mus);
+ }
+}
+
+void
+Pitched_trill_engraver::make_trill (Music *mus)
+{
+ SCM scm_pitch = mus->get_property ("trill-pitch");
+ Pitch * p = unsmob_pitch (scm_pitch);
+
+ SCM keysig = get_property ("localKeySignature");
+
+ SCM key = scm_cons (scm_int2num (p->get_octave ()),
+ scm_int2num (p->get_notename ()));
+
+ SCM handle = scm_assoc (key, keysig);
+ bool print_acc =
+ (handle == SCM_BOOL_F)
+ || p->get_alteration () == 0;
+
+ if (trill_head_)
+ {
+ programming_error ("already have a trill head.");
+ trill_head_ = 0;
+ }
+
+ trill_head_ = make_item ("TrillPitchHead", mus->self_scm ());
+ SCM c0scm = get_property ("middleCPosition");
+
+ int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
+
+ trill_head_->set_property ("staff-position",
+ scm_from_int (unsmob_pitch (scm_pitch)->steps ()
+ + c0));
+
+ trill_group_ = make_item ("TrillPitchGroup", mus->self_scm());
+
+ Axis_group_interface::add_element (trill_group_, trill_head_);
+
+ if (print_acc)
+ {
+ trill_accidental_ = make_item ("TrillPitchAccidental", mus->self_scm ());
+
+ // fixme: naming -> alterations
+ trill_accidental_->set_property ("accidentals", scm_list_1 (scm_from_int (p->get_alteration ())));
+ Side_position_interface::add_support (trill_accidental_, trill_head_);
+ trill_head_->set_property ("accidental-grob", trill_accidental_->self_scm ());
+ trill_group_->set_parent (trill_head_, Y_AXIS);
+ Axis_group_interface::add_element (trill_group_, trill_accidental_);
+ trill_accidental_->set_parent (trill_head_, Y_AXIS);
+ }
+}
+
+void
+Pitched_trill_engraver::stop_translation_timestep ()
+{
+ if (trill_group_)
+ for (int i = 0; i < heads_.size (); i++)
+ {
+ Side_position_interface::add_support (trill_group_, heads_[i]);
+ }
+
+ heads_.clear ();
+ trill_head_ = 0;
+ trill_group_ = 0;
+ trill_accidental_ = 0;
+}
+
+void
+Pitched_trill_engraver::process_music ()
+{
+}
+
+bool
+Pitched_trill_engraver::try_music (Music *)
+{
+ return false;
+}
+
+ADD_TRANSLATOR (Pitched_trill_engraver,
+ /* descr */ "Print the bracketed notehead after a notehead with trill.",
+ /* creats*/ "TrillPitchHead TrillPitchAccidental TrillPitchGroup",
+ /* accepts */ "",
+ /* acks */ "script-interface text-spanner-interface note-head-interface",
+ /* reads */ "",
+ /* write */ "");