source file of the GNU LilyPond music typesetter
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-
-#include "score.hh"
-#include "paper-column.hh"
-#include "output-def.hh"
-#include "side-position-interface.hh"
#include "engraver.hh"
-#include "moment.hh"
+#include "international.hh"
+#include "spanner.hh"
+#include "stream-event.hh"
+#include "warn.hh"
+
+#include "translator.icc"
-/**
- Manage the staff symbol.
- */
-class Staff_symbol_engraver : public Engraver {
+class Staff_symbol_engraver : public Engraver
+{
public:
TRANSLATOR_DECLARATIONS (Staff_symbol_engraver);
-
+
protected:
+ Drul_array<Stream_event *> span_events_;
Spanner *span_;
-
+ Spanner *finished_span_;
+ bool first_start_;
+
+protected:
+ virtual void start_spanner ();
+ virtual void stop_spanner ();
+
+ void stop_translation_timestep ();
virtual ~Staff_symbol_engraver ();
- virtual void acknowledge_grob (Grob_info);
+ DECLARE_ACKNOWLEDGER (grob);
+ DECLARE_TRANSLATOR_LISTENER (staff_span);
virtual void finalize ();
- virtual void process_music ();
+ void process_music ();
};
-
Staff_symbol_engraver::~Staff_symbol_engraver ()
{
assert (!span_);
Staff_symbol_engraver::Staff_symbol_engraver ()
{
+ finished_span_ = 0;
+ first_start_ = true;
span_ = 0;
+ span_events_[LEFT] = 0;
+ span_events_[RIGHT] = 0;
+}
+
+IMPLEMENT_TRANSLATOR_LISTENER (Staff_symbol_engraver, staff_span);
+void
+Staff_symbol_engraver::listen_staff_span (Stream_event *ev)
+{
+ Direction d = to_dir (ev->get_property ("span-direction"));
+ if (d)
+ ASSIGN_EVENT_ONCE (span_events_[d], ev);
+ else
+ programming_error (_ ("staff-span event has no direction"));
}
void
Staff_symbol_engraver::process_music ()
{
- if (!span_)
+ if (span_events_[STOP])
{
- span_ = make_spanner ("StaffSymbol", SCM_EOL);
-
- span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
-
-
+ finished_span_ = span_;
+ span_ = 0;
+ if (first_start_)
+ first_start_ = false;
}
+
+ if (span_events_[START]
+ || (first_start_ && !span_events_[STOP]))
+ start_spanner ();
}
void
-Staff_symbol_engraver::finalize ()
+Staff_symbol_engraver::start_spanner ()
{
- if (span_)
+ if (!span_)
{
- span_->set_bound (RIGHT,unsmob_grob (get_property ("currentCommandColumn")));
+ span_ = make_spanner ("StaffSymbol", SCM_EOL);
+ span_->set_bound (LEFT,
+ unsmob_grob (get_property ("currentCommandColumn")));
}
- span_ = 0;
}
void
-Staff_symbol_engraver::acknowledge_grob (Grob_info s)
+Staff_symbol_engraver::stop_spanner ()
{
- s.grob_->set_property ("staff-symbol", span_->self_scm ());
-}
+ if (!finished_span_)
+ return;
+ if (!finished_span_->get_bound (RIGHT))
+ finished_span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+
+ announce_end_grob (finished_span_,
+ span_events_[STOP]
+ ? span_events_[STOP]->self_scm ()
+ : SCM_EOL);
+
+ finished_span_ = 0;
+}
+void
+Staff_symbol_engraver::stop_translation_timestep ()
+{
+ if ((span_events_[START] || first_start_)
+ && span_)
+ {
+ first_start_ = false;
+ }
+ span_events_[START] = 0;
+ span_events_[STOP] = 0;
+ stop_spanner ();
+}
-ADD_TRANSLATOR (Staff_symbol_engraver,
-/* descr */ "Create the constellation of five (default) "
-"staff lines.",
-/* creats*/ "StaffSymbol",
-/* accepts */ "",
-/* acks */ "grob-interface",
-/* reads */ "",
-/* write */ "");
-
-/****************************************************************/
-
-
-class Tab_staff_symbol_engraver : public Staff_symbol_engraver
+void
+Staff_symbol_engraver::finalize ()
{
-public:
- TRANSLATOR_DECLARATIONS (Tab_staff_symbol_engraver);
-protected:
- virtual void process_music ();
-};
+ finished_span_ = span_;
+ span_ = 0;
+ stop_spanner ();
+}
+/*
+ Todo: staff-symbol-referencer iface.
+*/
void
-Tab_staff_symbol_engraver::process_music ()
+Staff_symbol_engraver::acknowledge_grob (Grob_info s)
{
- bool init = !span_;
- Staff_symbol_engraver::process_music ();
- if (init)
+ /*
+ Perhaps should try to take SeparationItem as bound of the staff
+ symbol?
+ */
+ if (span_ || finished_span_)
{
- int k = scm_ilength (get_property ("stringTunings"));
- if (k>= 0)
- span_->set_property ("line-count", scm_int2num (k));
+ Spanner *my = span_ ? span_ : finished_span_;
+ s.grob ()->set_object ("staff-symbol", my->self_scm ());
}
}
-Tab_staff_symbol_engraver::Tab_staff_symbol_engraver ()
-{
-}
+ADD_ACKNOWLEDGER (Staff_symbol_engraver, grob);
-ADD_TRANSLATOR (Tab_staff_symbol_engraver,
-/* descr */ "Create a staff-symbol, but look at stringTunings for the number of lines."
-"staff lines.",
-/* creats*/ "StaffSymbol",
-/* accepts */ "",
-/* acks */ "grob-interface",
-/* reads */ "stringTunings",
-/* write */ "");
+ADD_TRANSLATOR (Staff_symbol_engraver,
+ /* doc */ "Create the constellation of five (default) "
+ "staff lines.",
+ /* create */ "StaffSymbol",
+ /* read */ "",
+ /* write */ "");