source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "staff-symbol.hh"
-#include "score.hh"
-#include "paper-column.hh"
-#include "paper-def.hh"
-#include "side-position-interface.hh"
-#include "engraver.hh"
-#include "moment.hh"
-
-/**
- Manage the staff symbol.
- */
-class Staff_symbol_engraver : public Engraver {
- Staff_symbol *span_p_;
-public:
- VIRTUAL_COPY_CONS(Translator);
- Staff_symbol_engraver();
-
-protected:
- virtual ~Staff_symbol_engraver();
-
- virtual void acknowledge_element (Score_element_info);
- virtual void do_removal_processing();
- virtual void do_creation_processing();
-
-};
-
-
-Staff_symbol_engraver::~Staff_symbol_engraver()
+#include "staff-symbol-engraver.hh"
+#include "spanner.hh"
+
+Staff_symbol_engraver::~Staff_symbol_engraver ()
{
- assert (!span_p_);
+ assert (!span_);
}
-Staff_symbol_engraver::Staff_symbol_engraver()
+Staff_symbol_engraver::Staff_symbol_engraver ()
{
- span_p_ = 0;
+ finished_span_ = 0;
+ first_start_ = true;
+ span_ = 0;
+ span_events_[LEFT] = 0;
+ span_events_[RIGHT] = 0;
}
-void
-Staff_symbol_engraver::do_creation_processing()
+bool
+Staff_symbol_engraver::try_music (Music *music)
{
- span_p_ = new Staff_symbol (get_property ("staffSymbolBasicProperties"));
- span_p_->set_bound(LEFT,get_staff_info().command_pcol_l ());
-
- announce_element (Score_element_info (span_p_, 0));
+ Direction d = to_dir (music->get_property ("span-direction"));
+ if (d)
+ {
+ span_events_[d] = music;
+ return true;
+ }
+
+ return false;
}
void
-Staff_symbol_engraver::do_removal_processing()
+Staff_symbol_engraver::process_music ()
{
- SCM n = get_property ("numberOfStaffLines");
- SCM ss = get_property ("staffSpace");
+ if (span_events_[STOP])
+ {
+ finished_span_ = span_;
+ span_ = 0;
+ if (first_start_)
+ first_start_ = false;
+ }
+
+ if (span_events_[START]
+ || (first_start_ && !span_events_[STOP]))
+ start_spanner ();
+}
- if (gh_number_p (ss))
- span_p_->set_elt_property ("staff-space", ss);
- if (gh_number_p (n))
- span_p_->set_elt_property ("line-count", n);
+void
+Staff_symbol_engraver::start_spanner ()
+{
+ if (!span_)
+ span_ = make_spanner ("StaffSymbol", SCM_EOL);
+}
- span_p_->set_bound(RIGHT,get_staff_info().command_pcol_l ());
- typeset_element (span_p_);
- span_p_ =0;
+void
+Staff_symbol_engraver::stop_spanner ()
+{
+ if (finished_span_ && !finished_span_->get_bound (RIGHT))
+ finished_span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ finished_span_ = 0;
}
void
-Staff_symbol_engraver::acknowledge_element (Score_element_info s)
+Staff_symbol_engraver::stop_translation_timestep ()
{
- s.elem_l_->set_elt_pointer ("staff-symbol", span_p_->self_scm_);
- s.elem_l_->add_dependency (span_p_); // UGH. UGH. UGH
+ if ((span_events_[START] || first_start_)
+ && span_
+ && !span_->get_bound (LEFT))
+ {
+ span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
+ first_start_ = false;
+ }
+
+ span_events_[START] = 0;
+ span_events_[STOP] = 0;
+ stop_spanner ();
}
+void
+Staff_symbol_engraver::finalize ()
+{
+ finished_span_ = span_;
+ span_ = 0;
+ stop_spanner ();
+}
-ADD_THIS_TRANSLATOR(Staff_symbol_engraver);
+/*
+ Todo: staff-symbol-referencer iface.
+*/
+void
+Staff_symbol_engraver::acknowledge_grob (Grob_info s)
+{
+ /*
+ Perhaps should try to take SeparationItem as bound of the staff
+ symbol?
+ */
+ if (span_ || finished_span_)
+ {
+ Spanner *my = span_ ? span_ : finished_span_;
+ s.grob ()->set_object ("staff-symbol", my->self_scm ());
+ }
+}
+#include "translator.icc"
+ADD_ACKNOWLEDGER (Staff_symbol_engraver, grob);
+ADD_TRANSLATOR (Staff_symbol_engraver,
+ /* doc */ "Create the constellation of five (default) "
+ "staff lines.",
+ /* create */ "StaffSymbol",
+ /* accept */ "staff-span-event",
+ /* read */ "",
+ /* write */ "");