/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
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 "tie.hh"
#include "tie-column.hh"
#include "warn.hh"
+#include "misc.hh"
#include "translator.icc"
Every time process_music () is called and there are note events, we
figure out how long the note to typeset should be. It should be no
longer than what's specified, than what is left to do and it should
- not cross barlines.
+ not cross barlines or sub-bar units.
We copy the events into scratch note events, to make sure that we get
all durations exactly right.
Rational do_nothing_until_;
Rational factor_;
- Moment next_barline_moment ();
+ Moment next_moment (Rational const &);
Item *make_note_head (Stream_event *);
public:
}
/*
- The duration _until_ the next bar line.
+ The duration _until_ the next bar line or completion unit
*/
Moment
-Completion_heads_engraver::next_barline_moment ()
+Completion_heads_engraver::next_moment (Rational const ¬e_len)
{
Moment *e = unsmob_moment (get_property ("measurePosition"));
Moment *l = unsmob_moment (get_property ("measureLength"));
return Moment (0, 0);
}
- return (*l - *e);
+ Moment result = *l - *e;
+ Moment const *unit = unsmob_moment (get_property ("completionUnit"));
+
+ if (unit)
+ {
+ Rational const now_unit = e->main_part_ / unit->main_part_;
+ if (now_unit.den () > 1)
+ {
+ /*
+ within a unit - go to the end of that
+ */
+ result = unit->main_part_
+ * (Rational (1) - (now_unit - now_unit.trunc_rat ()));
+ }
+ else
+ {
+ /*
+ at the beginning of a unit:
+ take a power-of-two number of units, but not more than required,
+ since then the Duration constructor destroys the unit structure
+ */
+ if (note_len < result.main_part_)
+ result.main_part_ = note_len;
+ Rational const step_unit = result.main_part_ / unit->main_part_;
+ if (step_unit.den () < step_unit.num ())
+ {
+ int const log2
+ = intlog2 (int (step_unit.num () / step_unit.den ()));
+ result.main_part_ = unit->main_part_ * Rational (1 << log2);
+ }
+ }
+ }
+
+ return result;
}
Item *
if (left_to_do_)
{
/*
- note that note_dur may be strictly less than left_to_do_
- (say, if left_to_do_ == 5/8)
+ note that note_dur may be strictly less than left_to_do_
+ (say, if left_to_do_ == 5/8)
*/
if (factor_.denominator () == 1 && factor_ > Rational (1, 1))
- note_dur = Duration (left_to_do_, false);
+ note_dur = Duration (left_to_do_, false);
else
- note_dur = Duration (left_to_do_ / factor_, false).compressed (factor_);
+ note_dur = Duration (left_to_do_ / factor_, false).compressed (factor_);
}
else
{
factor_ = note_dur.factor ();
left_to_do_ = orig->get_length ();
}
- Moment nb = next_barline_moment ();
+ Moment nb = next_moment (note_dur.get_length ());
if (nb.main_part_ && nb < note_dur.get_length ())
{
- if (factor_.denominator () == 1 && factor_ > Rational (1, 1))
- note_dur = Duration (nb.main_part_, false);
+ if (factor_.denominator () == 1 && factor_.numerator () > 1)
+ note_dur = Duration (nb.main_part_, false);
else
- note_dur = Duration (nb.main_part_ / factor_, false).compressed (factor_);
+ note_dur = Duration (nb.main_part_ / factor_, false).compressed (factor_);
}
do_nothing_until_ = now.main_part_ + note_dur.get_length ();
Stream_event *event = note_events_[i];
if (need_clone)
- event = event->clone ();
+ event = event->clone ();
SCM pits = note_events_[i]->get_property ("pitch");
event->set_property ("pitch", pits);
event->set_property ("duration-log", scm_from_int (note_dur.duration_log ()));
/*
- The Completion_heads_engraver splits an event into a group of consecutive events.
- For each event in the group, the property "autosplit-end" denotes whether the current event
- was truncated during splitting. Based on "autosplit-end", the Tie_engraver decides whether a
- tie event should be processed.
+ The Completion_heads_engraver splits an event into a group of consecutive events.
+ For each event in the group, the property "autosplit-end" denotes whether the current event
+ was truncated during splitting. Based on "autosplit-end", the Tie_engraver decides whether a
+ tie event should be processed.
*/
event->set_property ("autosplit-end",
- ly_bool2scm (left_to_do_ - note_dur.get_length () > Rational (0)));
+ ly_bool2scm (left_to_do_ - note_dur.get_length () > Rational (0)));
Item *note = make_note_head (event);
if (need_clone)
- event->unprotect ();
+ event->unprotect ();
notes_.push_back (note);
}
if (prev_notes_.size () == notes_.size ())
{
for (vsize i = 0; i < notes_.size (); i++)
- make_tie (prev_notes_[i], notes_[i]);
+ make_tie (prev_notes_[i], notes_[i]);
}
if (ties_.size () && !tie_column_)
prev_notes_.clear ();
}
context ()->set_property ("completionBusy",
- ly_bool2scm (note_events_.size ()));
+ ly_bool2scm (note_events_.size ()));
}
Completion_heads_engraver::Completion_heads_engraver ()
}
ADD_TRANSLATOR (Completion_heads_engraver,
- /* doc */
- "This engraver replaces @code{Note_heads_engraver}. It plays"
- " some trickery to break long notes and automatically tie them"
- " into the next measure.",
-
- /* create */
- "NoteHead "
- "Tie "
- "TieColumn ",
-
- /* read */
- "measureLength "
- "measurePosition "
- "middleCPosition "
- "timing ",
-
- /* write */
- "completionBusy "
- );
+ /* doc */
+ "This engraver replaces @code{Note_heads_engraver}. It plays"
+ " some trickery to break long notes and automatically tie them"
+ " into the next measure.",
+
+ /* create */
+ "NoteHead "
+ "Tie "
+ "TieColumn ",
+
+ /* read */
+ "measureLength "
+ "measurePosition "
+ "middleCPosition "
+ "timing ",
+
+ /* write */
+ "completionBusy "
+ );
projects / lilypond.git / blobdiff