(c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-#include "context.hh"
-#include "multi-measure-rest.hh"
#include "timing-translator.hh"
#include "engraver.hh"
+
+#include "context.hh"
+#include "multi-measure-rest.hh"
#include "grob.hh"
+#include "warn.hh"
+
-/**
- Do time bookkeeping
-*/
class Timing_engraver : public Timing_translator, public Engraver
{
protected:
- /* Needed to know whether we're advancing in grace notes, or not. */
+ /* Need to know whether we're advancing in grace notes, or not. */
Moment last_moment_;
virtual void start_translation_timestep ();
- virtual void initialize ();
virtual void process_music ();
virtual void stop_translation_timestep ();
TRANSLATOR_DECLARATIONS (Timing_engraver);
};
+ADD_TRANSLATOR (Timing_engraver,
+ /* descr */ " Responsible for synchronizing timing information from staves. "
+ "Normally in @code{Score}. In order to create polyrhythmic music, "
+ "this engraver should be removed from @code{Score} and placed in "
+ "@code{Staff}. "
+ "\n\nThis engraver adds the alias @code{Timing} to its containing context.",
+ /* creats*/ "",
+ /* accepts */ "",
+ /* acks */ "",
+ /* reads */ "automaticBars whichBar barAlways defaultBarType "
+ "skipBars timing measureLength measurePosition currentBarNumber",
+ /* write */ "");
+
+
Timing_engraver::Timing_engraver ()
{
last_moment_.main_part_ = Rational (-1);
}
-void
-Timing_engraver::initialize ()
-{
- Timing_translator::initialize ();
-
- SCM which = get_property ("whichBar");
- Moment now = now_mom ();
-
- /* Set the first bar of the score? */
- if (!scm_is_string (which))
- which = (now.main_part_ || now.main_part_ == last_moment_.main_part_)
- ? SCM_EOL : scm_makfrom0str ("|");
-
- context ()->set_property ("whichBar", which);
-}
-
void
Timing_engraver::process_music ()
{
if (start_of_measure)
{
Moment mlen = Moment (measure_length ());
- unsmob_grob (get_property ("currentCommandColumn"))
- ->set_property ("measure-length", mlen.smobbed_copy ());
+ Grob * column = unsmob_grob (get_property ("currentCommandColumn"));
+ if (column)
+ column->set_property ("measure-length", mlen.smobbed_copy ());
+ else
+ programming_error("No command column?");
}
}
{
SCM always = get_property ("barAlways");
- if (start_of_measure || (to_boolean (always)))
+ if ((start_of_measure && last_moment_.main_part_ >= Moment (0))
+ || to_boolean (always))
{
/* should this work, or be junked? See input/bugs/no-bars.ly */
which = get_property ("defaultBarType");
context ()->set_property ("whichBar", SCM_EOL);
last_moment_ = now_mom ();
}
-
-ADD_TRANSLATOR (Timing_engraver,
- /* descr */ " Responsible for synchronizing timing information from staves. "
- "Normally in @code{Score}. In order to create polyrhythmic music, "
- "this engraver should be removed from @code{Score} and placed in "
- "@code{Staff}. "
- "\n\nThis engraver adds the alias @code{Timing} to its containing context.",
- /* creats*/ "",
- /* accepts */ "",
- /* acks */ "",
- /* reads */ "automaticBars whichBar barAlways defaultBarType skipBars timing measureLength measurePosition currentBarNumber",
- /* write */ "");