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 "staff-symbol-engraver.hh"
+#include "engraver.hh"
+#include "international.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;
}
-bool
-Staff_symbol_engraver::try_music (Music *music)
+IMPLEMENT_TRANSLATOR_LISTENER (Staff_symbol_engraver, staff_span);
+void
+Staff_symbol_engraver::listen_staff_span (Stream_event *ev)
{
- Direction d = to_dir (music->get_property ("span-direction"));
+ Direction d = to_dir (ev->get_property ("span-direction"));
if (d)
- {
- span_events_[d] = music;
- return true;
- }
-
- return false;
+ ASSIGN_EVENT_ONCE (span_events_[d], ev);
+ else
+ programming_error (_ ("staff-span event has no direction"));
}
void
{
finished_span_ = span_;
span_ = 0;
+ if (first_start_)
+ first_start_ = false;
}
if (span_events_[START]
Staff_symbol_engraver::start_spanner ()
{
if (!span_)
- span_ = make_spanner ("StaffSymbol", SCM_EOL);
+ {
+ span_ = make_spanner ("StaffSymbol", SCM_EOL);
+ span_->set_bound (LEFT,
+ unsmob_grob (get_property ("currentCommandColumn")));
+ }
}
void
Staff_symbol_engraver::stop_spanner ()
{
- if (finished_span_ && !finished_span_->get_bound (RIGHT))
+ 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;
}
Staff_symbol_engraver::stop_translation_timestep ()
{
if ((span_events_[START] || first_start_)
- && span_
- && !span_->get_bound (LEFT))
+ && span_)
{
- 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.",
/* create */ "StaffSymbol",
- /* accept */ "staff-span-event",
/* read */ "",
/* write */ "");