source file of the GNU LilyPond music typesetter
- (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 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"
-
-/**
- Manage the staff symbol.
-*/
-class Staff_symbol_engraver : public Engraver
-{
-public:
- TRANSLATOR_DECLARATIONS (Staff_symbol_engraver);
-
-protected:
- Spanner *span_;
-
- virtual ~Staff_symbol_engraver ();
- virtual void acknowledge_grob (Grob_info);
- virtual void finalize ();
- virtual void process_music ();
-};
+#include "staff-symbol-engraver.hh"
+#include "spanner.hh"
Staff_symbol_engraver::~Staff_symbol_engraver ()
{
Staff_symbol_engraver::Staff_symbol_engraver ()
{
+ finished_span_ = 0;
+ first_start_ = true;
span_ = 0;
+ span_events_[LEFT] = 0;
+ span_events_[RIGHT] = 0;
}
-void
-Staff_symbol_engraver::process_music ()
+bool
+Staff_symbol_engraver::try_music (Music *music)
{
- if (!span_)
+ Direction d = to_dir (music->get_property ("span-direction"));
+ if (d)
{
- span_ = make_spanner ("StaffSymbol", SCM_EOL);
-
- span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
-
+ span_events_[d] = music;
+ return true;
}
+
+ return false;
}
void
-Staff_symbol_engraver::finalize ()
+Staff_symbol_engraver::process_music ()
{
- if (span_)
+ if (span_events_[STOP])
{
- span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ finished_span_ = span_;
+ span_ = 0;
+ if (first_start_)
+ first_start_ = false;
}
- span_ = 0;
+
+ if (span_events_[START]
+ || (first_start_ && !span_events_[STOP]))
+ start_spanner ();
}
void
-Staff_symbol_engraver::acknowledge_grob (Grob_info s)
+Staff_symbol_engraver::start_spanner ()
{
- s.grob_->set_property ("staff-symbol", span_->self_scm ());
+ if (!span_)
+ span_ = make_spanner ("StaffSymbol", SCM_EOL);
}
-
-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::stop_spanner ()
{
-public:
- TRANSLATOR_DECLARATIONS (Tab_staff_symbol_engraver);
-protected:
- virtual void process_music ();
-};
+ if (finished_span_ && !finished_span_->get_bound (RIGHT))
+ finished_span_->set_bound (RIGHT, unsmob_grob (get_property ("currentCommandColumn")));
+ finished_span_ = 0;
+}
void
-Tab_staff_symbol_engraver::process_music ()
+Staff_symbol_engraver::stop_translation_timestep ()
{
- bool init = !span_;
- Staff_symbol_engraver::process_music ();
- if (init)
+ if ((span_events_[START] || first_start_)
+ && span_
+ && !span_->get_bound (LEFT))
{
- int k = scm_ilength (get_property ("stringTunings"));
- if (k>= 0)
- span_->set_property ("line-count", scm_int2num (k));
+ 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 ();
}
-Tab_staff_symbol_engraver::Tab_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 ());
+ }
}
-ADD_TRANSLATOR (Tab_staff_symbol_engraver,
- /* descr */ "Create a staff-symbol, but look at stringTunings for the number of lines."
+#include "translator.icc"
+ADD_ACKNOWLEDGER (Staff_symbol_engraver, grob);
+ADD_TRANSLATOR (Staff_symbol_engraver,
+ /* doc */ "Create the constellation of five (default) "
"staff lines.",
- /* creats*/ "StaffSymbol",
- /* accepts */ "",
- /* acks */ "grob-interface",
- /* reads */ "stringTunings",
+ /* create */ "StaffSymbol",
+ /* accept */ "staff-span-event",
+ /* read */ "",
/* write */ "");