/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 2010 Neil Puttock <n.puttock@gmail.com>
+ Copyright (C) 2010--2015 Neil Puttock <n.puttock@gmail.com>
LilyPond is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
*/
#include "context.hh"
+#include "global-context.hh"
#include "input.hh"
#include "international.hh"
#include "moment.hh"
#include "music.hh"
#include "simple-music-iterator.hh"
+#include "lily-imports.hh"
class Partial_iterator : public Simple_music_iterator
{
public:
DECLARE_SCHEME_CALLBACK (constructor, ());
- protected:
+ DECLARE_SCHEME_CALLBACK (finalization, (SCM, SCM));
+protected:
virtual void process (Moment);
};
void
Partial_iterator::process (Moment m)
{
- if (Duration *dur
- = unsmob_duration (get_music ()->get_property ("partial-duration")))
+ if (Duration * dur
+ = unsmob<Duration> (get_music ()->get_property ("duration")))
{
- Context *ctx = get_outlet ();
- Moment now = ctx->now_mom ();
- if (now.main_part_ > Rational (0))
- get_music ()->origin ()->
- warning (_ ("trying to use \\partial after the start of a piece"));
Moment length = Moment (dur->get_length ());
- now = Moment (0, now.grace_part_);
- ctx->set_property ("measurePosition", (now - length).smobbed_copy ());
+
+ // Partial_iterator is an iterator rather than an engraver,
+ // so the active context it is getting called in does not
+ // depend on which context definition the engraver might be
+ // defined.
+ //
+ // Using where_defined to find the context where
+ // measurePosition should be overwritten does not actually
+ // work since the Timing_translator does not set
+ // measurePosition when initializing.
+
+ Context *timing = unsmob<Context>
+ (Lily::ly_context_find (get_outlet ()->self_scm (),
+ ly_symbol2scm ("Timing")));
+
+ if (!timing)
+ programming_error ("missing Timing in \\partial");
+ else if (get_outlet ()->now_mom () > 0)
+ {
+ timing->set_property ("partialBusy", ly_bool2scm (true));
+ Global_context *tg = get_outlet ()->get_global_context ();
+ tg->add_finalization (scm_list_3 (finalization_proc,
+ get_outlet ()->self_scm (),
+ length.smobbed_copy ()));
+ }
+ else
+ {
+ Moment mp = robust_scm2moment
+ (timing->get_property ("measurePosition"),
+ Rational (0));
+ mp.main_part_ = 0;
+ timing->set_property
+ ("measurePosition", (mp - length).smobbed_copy ());
+ }
}
else
programming_error ("invalid duration in \\partial");
}
IMPLEMENT_CTOR_CALLBACK (Partial_iterator);
+
+MAKE_SCHEME_CALLBACK (Partial_iterator, finalization, 2);
+SCM
+Partial_iterator::finalization (SCM ctx, SCM length)
+{
+ LY_ASSERT_SMOB (Context, ctx, 1);
+ LY_ASSERT_SMOB (Moment, length, 2);
+ Context *timing = unsmob<Context>
+ (Lily::ly_context_find (ctx, ly_symbol2scm ("Timing")));
+ if (!timing) {
+ programming_error ("missing Timing in \\partial");
+ return SCM_UNSPECIFIED;
+ }
+ Moment mp = robust_scm2moment (timing->get_property ("measurePosition"),
+ Rational (0));
+ mp.main_part_ = measure_length (timing);
+ timing->set_property ("measurePosition",
+ (mp - *unsmob<Moment> (length)).smobbed_copy ());
+ timing->unset_property (ly_symbol2scm ("partialBusy"));
+
+ return SCM_UNSPECIFIED;
+}