/*
- Simultaneous_music-iterator.cc -- implement Simultaneous_music_iterator
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.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
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "translator-group.hh"
-#include "warn.hh"
#include "simultaneous-music-iterator.hh"
-#include "music-list.hh"
-#include "translator-def.hh"
-
+#include "music.hh"
+#include "context.hh"
+#include "warn.hh"
+#include "context-def.hh"
Simultaneous_music_iterator::Simultaneous_music_iterator ()
{
- separate_contexts_b_ = false;
+ create_separate_contexts_ = false;
children_list_ = SCM_EOL;
}
-Simultaneous_music_iterator::Simultaneous_music_iterator (Simultaneous_music_iterator const& src)
- : Music_iterator (src)
-{
- separate_contexts_b_
- = src.separate_contexts_b_;
- children_list_ = SCM_EOL;
-
- SCM children_list = SCM_EOL;
- SCM *tail = &children_list;
- for (SCM s = src.children_list_; gh_pair_p (s); s = gh_cdr(s))
- {
- Music_iterator *i = unsmob_iterator (gh_car (s));
- SCM cl = i->clone ()->self_scm();
- *tail = scm_cons (cl, *tail);
- tail = SCM_CDRLOC (*tail);
- scm_gc_unprotect_object (cl);
- }
-
- children_list_ = children_list;
- scm_remember_upto_here_1 (children_list);
-}
-
void
-Simultaneous_music_iterator::derived_mark()const
+Simultaneous_music_iterator::derived_mark () const
{
scm_gc_mark (children_list_);
}
-SCM
-Simultaneous_music_iterator::get_pending_events (Moment m)const
+void
+Simultaneous_music_iterator::derived_substitute (Context *f, Context *t)
{
- SCM l = SCM_EOL;
- for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
- {
- l = gh_append2 (unsmob_iterator (gh_car (s))->get_pending_events (m), l);
- }
- return l;
+ for (SCM s = children_list_; scm_is_pair (s); s = scm_cdr (s))
+ Music_iterator::unsmob (scm_car (s))->substitute_outlet (f, t);
}
void
{
int j = 0;
- SCM i = get_music ()->get_mus_property ("elements");
+ SCM i = get_music ()->get_property ("elements");
children_list_ = SCM_EOL;
- SCM * tail = &children_list_;
- for (; gh_pair_p (i); i = ly_cdr (i), j++)
+ SCM *tail = &children_list_;
+ for (; scm_is_pair (i); i = scm_cdr (i), j++)
{
- Music *mus = unsmob_music (ly_car (i));
+ Music *mus = Music::unsmob (scm_car (i));
SCM scm_iter = get_static_get_iterator (mus);
- Music_iterator * mi = unsmob_iterator (scm_iter);
+ Music_iterator *mi = Music_iterator::unsmob (scm_iter);
- /* if separate_contexts_b_ is set, create a new context with the
- number number as name */
+ /* if create_separate_contexts_ is set, create a new context with the
+ number number as name */
- SCM name = unsmob_translator_def (report_to ()->definition_)->get_context_name ();
- Translator_group * t = (j && separate_contexts_b_)
- ? report_to ()->find_create_translator (name, to_string (j), SCM_EOL)
- : report_to ();
+ SCM name = ly_symbol2scm (get_outlet ()->context_name ().c_str ());
+ Context *c = (j && create_separate_contexts_)
+ ? get_outlet ()->find_create_context (name, ::to_string (j), SCM_EOL)
+ : get_outlet ();
- if (!t)
- t = report_to ();
+ if (!c)
+ c = get_outlet ();
- mi->init_translator (mus, t);
+ mi->init_context (mus, c);
mi->construct_children ();
- if (mi->ok ())
- {
- *tail = scm_cons (scm_iter, *tail);
- tail = SCM_CDRLOC (*tail);
- }
+ if (mi->ok ())
+ {
+ *tail = scm_cons (scm_iter, *tail);
+ tail = SCM_CDRLOC (*tail);
+ }
else
- mi->set_translator (0);
+ mi->quit ();
}
}
+// If there are non-run-always iterators and all of them die, take the
+// rest of them along.
void
Simultaneous_music_iterator::process (Moment until)
{
- SCM *proc = &children_list_;
- while(gh_pair_p (*proc))
+ bool had_good = false;
+ bool had_bad = false;
+ SCM *proc = &children_list_;
+ while (scm_is_pair (*proc))
{
- Music_iterator * i = unsmob_iterator (gh_car (*proc));
- if (i->pending_moment () == until)
- {
- i->process (until);
- }
+ Music_iterator *i = Music_iterator::unsmob (scm_car (*proc));
+ bool run_always = i->run_always ();
+ if (run_always || i->pending_moment () == until)
+ i->process (until);
if (!i->ok ())
- {
- i->quit ();
- *proc = gh_cdr (*proc);
- }
+ {
+ if (!run_always)
+ had_bad = true;
+ i->quit ();
+ *proc = scm_cdr (*proc);
+ }
else
- {
- proc = SCM_CDRLOC(*proc);
- }
+ {
+ if (!run_always)
+ had_good = true;
+ proc = SCM_CDRLOC (*proc);
+ }
}
-}
-
-void
-Simultaneous_music_iterator::skip (Moment until)
-{
- SCM *proc = &children_list_;
- while(gh_pair_p (*proc))
+ // If there were non-run-always iterators and all of them died, take
+ // the rest of the run-always iterators along with them. They have
+ // likely lost their reference iterators. Basing this on the actual
+ // music contexts is not reliable since something like
+ // \new Voice = blah {
+ // << \context Voice = blah { c4 d }
+ // \addlyrics { oh no }
+ // >> e f
+ // }
+ // cannot wait for the death of context blah before ending the
+ // simultaneous iterator.
+ if (had_bad && !had_good)
{
- Music_iterator * i = unsmob_iterator (gh_car (*proc));
- if (i->pending_moment () <= until)
- {
- i->skip (until);
- }
- if (!i->ok ())
- {
- i->quit ();
- *proc = gh_cdr (*proc);
- }
- else
- {
- proc = SCM_CDRLOC(*proc);
- }
+ for (SCM p = children_list_; scm_is_pair (p); p = scm_cdr (p))
+ Music_iterator::unsmob (scm_car (p))->quit ();
+ children_list_ = SCM_EOL;
}
}
{
Moment next;
next.set_infinite (1);
-
- for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
- next = next <? unsmob_iterator (gh_car (s))->pending_moment () ;
- return next;
-}
+ for (SCM s = children_list_; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Music_iterator *it = Music_iterator::unsmob (scm_car (s));
+ next = min (next, it->pending_moment ());
+ }
+ return next;
+}
bool
Simultaneous_music_iterator::ok () const
{
- return gh_pair_p (children_list_);
+ bool run_always_ok = false;
+ for (SCM s = children_list_; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Music_iterator *it = Music_iterator::unsmob (scm_car (s));
+ if (!it->run_always ())
+ return true;
+ else
+ run_always_ok = run_always_ok || it->ok ();
+ }
+ return run_always_ok;
}
-Music_iterator*
-Simultaneous_music_iterator::try_music_in_children (Music *m) const
+bool
+Simultaneous_music_iterator::run_always () const
{
- Music_iterator * b=0;
- for (SCM s = children_list_; !b && gh_pair_p (s); s = gh_cdr(s))
- b =unsmob_iterator (gh_car (s))->try_music (m);
- return b;
+ for (SCM s = children_list_; scm_is_pair (s); s = scm_cdr (s))
+ {
+ Music_iterator *it = Music_iterator::unsmob (scm_car (s));
+ if (it->run_always ())
+ return true;
+ }
+ return false;
}
void
Simultaneous_music_iterator::do_quit ()
{
- for (SCM s = children_list_; gh_pair_p (s); s = gh_cdr(s))
- unsmob_iterator (gh_car (s))->quit();
+ for (SCM s = children_list_; scm_is_pair (s); s = scm_cdr (s))
+ Music_iterator::unsmob (scm_car (s))->quit ();
}
-
IMPLEMENT_CTOR_CALLBACK (Simultaneous_music_iterator);
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