source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
-
#include "translator-group.hh"
-#include "command-request.hh"
-#include "score-element-info.hh"
+
+#include "grob-info.hh"
#include "multi-measure-rest.hh"
#include "timing-translator.hh"
#include "engraver.hh"
+#include "grob.hh"
/**
Do time bookkeeping
*/
class Timing_engraver : public Timing_translator, public Engraver
-{
- Bar_req * bar_req_l_;
+{
protected:
- virtual bool do_try_music (Music * );
- virtual void do_post_move_processing ();
- virtual void do_process_music ();
+ /* Needed to know whether we're advancing in grace notes, or not. */
+ Moment last_moment_;
+
+ virtual void start_translation_timestep ();
+ virtual void stop_translation_timestep ();
+
public:
- String which_bar ();
- VIRTUAL_COPY_CONS(Translator);
+ TRANSLATOR_DECLARATIONS (Timing_engraver);
};
-ADD_THIS_TRANSLATOR(Timing_engraver);
+
+Timing_engraver::Timing_engraver ()
+{
+ last_moment_.main_part_ = Rational (-1);
+}
+
+
void
-Timing_engraver::do_post_move_processing( )
+Timing_engraver::start_translation_timestep ()
{
- bar_req_l_ = 0;
- Timing_translator::do_post_move_processing ();
+ Timing_translator::start_translation_timestep ();
+
+ SCM automatic_bars = get_property ("automaticBars");
+ Moment now = now_mom ();
+ SCM which = get_property ("whichBar");
+
+ /* Set the first bar of the score? */
+ if (!gh_string_p (which))
+ which
+ = (now.main_part_ || now.main_part_ == last_moment_.main_part_)
+ ? SCM_EOL : scm_makfrom0str ("|");
- SCM nonauto = get_property ("barNonAuto");
- SCM which = now_mom () ? SCM_UNDEFINED : ly_str02scm ("|");
+ Moment mp = measure_position ();
+ bool start_of_measure = (last_moment_.main_part_ != now.main_part_
+ && !mp.main_part_);
+
+ if (start_of_measure)
+ {
+ Moment mlen = Moment (measure_length ());
+ unsmob_grob (get_property ("currentCommandColumn"))
+ ->set_grob_property ("measure-length", mlen.smobbed_copy ());
+ }
- if (which == SCM_UNDEFINED && !to_boolean (nonauto))
+ if (!gh_string_p (which) && to_boolean (automatic_bars))
{
SCM always = get_property ("barAlways");
- if (!measure_position ()
- || (to_boolean (always)))
+
+ if ( start_of_measure || (to_boolean (always)))
{
- which=get_property ("defaultBarType" );
+ /* should this work, or be junked? See input/bugs/no-bars.ly */
+ which = get_property ("defaultBarType");
}
}
- daddy_trans_l_->set_property ("whichBar", which);
-}
-
-bool
-Timing_engraver::do_try_music (Music*m)
-{
- if (Bar_req * b= dynamic_cast <Bar_req *> (m))
- {
- if (bar_req_l_ && !bar_req_l_->equal_b (b))
- return false;
-
- bar_req_l_ = b;
- return true;
- }
-
- return Timing_translator::do_try_music (m);
+ daddy_trans_->set_property ("whichBar", which);
}
void
-Timing_engraver::do_process_music ()
+Timing_engraver::stop_translation_timestep ()
{
- if (bar_req_l_)
- daddy_trans_l_->set_property ("whichBar", bar_req_l_->get_mus_property ("type"));
+ Timing_translator::stop_translation_timestep ();
+ daddy_trans_->set_property ("whichBar", SCM_EOL);
+ last_moment_ = now_mom ();
}
+
+ENTER_DESCRIPTION (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}.",
+/* creats*/ "",
+/* accepts */ "",
+/* acks */ "",
+/* reads */ "timeSignatureFraction automaticBars whichBar barAlways defaultBarType skipBars timing measureLength measurePosition currentBarNumber",
+/* write */ "");