(c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include "engraver.hh"
-#include "international.hh"
+#include "staff-symbol-engraver.hh"
#include "spanner.hh"
-#include "stream-event.hh"
-#include "warn.hh"
-
-#include "translator.icc"
-
-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 ();
- DECLARE_ACKNOWLEDGER (grob);
- DECLARE_TRANSLATOR_LISTENER (staff_span);
- virtual void finalize ();
- void process_music ();
-};
Staff_symbol_engraver::~Staff_symbol_engraver ()
{
span_events_[RIGHT] = 0;
}
-IMPLEMENT_TRANSLATOR_LISTENER (Staff_symbol_engraver, staff_span);
-void
-Staff_symbol_engraver::listen_staff_span (Stream_event *ev)
+bool
+Staff_symbol_engraver::try_music (Music *music)
{
- Direction d = to_dir (ev->get_property ("span-direction"));
+ Direction d = to_dir (music->get_property ("span-direction"));
if (d)
- ASSIGN_EVENT_ONCE (span_events_[d], ev);
- else
- programming_error (_ ("staff-span event has no direction"));
+ {
+ span_events_[d] = music;
+ return true;
+ }
+
+ return false;
}
void
Staff_symbol_engraver::start_spanner ()
{
if (!span_)
- {
- span_ = make_spanner ("StaffSymbol", SCM_EOL);
- span_->set_bound (LEFT,
- unsmob_grob (get_property ("currentCommandColumn")));
- }
+ span_ = make_spanner ("StaffSymbol", SCM_EOL);
}
void
Staff_symbol_engraver::stop_spanner ()
{
- if (!finished_span_)
- return;
-
- if (!finished_span_->get_bound (RIGHT))
+ if (finished_span_ && !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;
}
Staff_symbol_engraver::stop_translation_timestep ()
{
if ((span_events_[START] || first_start_)
- && span_)
+ && span_
+ && !span_->get_bound (LEFT))
{
+ span_->set_bound (LEFT, unsmob_grob (get_property ("currentCommandColumn")));
first_start_ = false;
}
}
}
+#include "translator.icc"
ADD_ACKNOWLEDGER (Staff_symbol_engraver, grob);
-
ADD_TRANSLATOR (Staff_symbol_engraver,
/* doc */ "Create the constellation of five (default) "
"staff lines.",