/*
This file is part of LilyPond, the GNU music typesetter.
- Copyright (C) 2001--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ Copyright (C) 2001--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
Erik Sandberg <mandolaerik@gmail.com>
LilyPond is free software: you can redistribute it and/or modify
along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
+#include "context.hh"
#include "input.hh"
#include "repeated-music.hh"
#include "sequential-iterator.hh"
+#include "lily-imports.hh"
class Percent_repeat_iterator : public Sequential_iterator
{
Percent_repeat_iterator ();
protected:
virtual SCM get_music_list () const;
+ virtual void construct_children ();
+ virtual void next_element (bool);
+ virtual void derived_mark () const;
+private:
+ SCM child_list_;
+ int starting_bar_;
};
IMPLEMENT_CTOR_CALLBACK (Percent_repeat_iterator);
Percent_repeat_iterator::Percent_repeat_iterator ()
+ : child_list_ (SCM_UNDEFINED), starting_bar_ (-1)
{
}
+void
+Percent_repeat_iterator::derived_mark () const
+{
+ scm_gc_mark (child_list_);
+ Sequential_iterator::derived_mark ();
+}
+
+void
+Percent_repeat_iterator::construct_children ()
+{
+ Music *mus = get_music ();
+
+ Music *child = Repeated_music::body (mus);
+ child_list_ = scm_list_1 (child->self_scm ());
+
+ Sequential_iterator::construct_children ();
+
+ descend_to_bottom_context ();
+ if (!measure_position (get_outlet ()).main_part_)
+ starting_bar_ =
+ robust_scm2int (get_outlet ()->get_property ("internalBarNumber"), 0);
+}
+
SCM
Percent_repeat_iterator::get_music_list () const
{
- /* TODO: Distinction between percent, double-percent and slash */
+ return child_list_;
+}
+
+// Arrive here when child processing has been completed. At that
+// point of time, we can determine what kind of percent expression we
+// are dealing with and extend the child list just in time before the
+// next iterator is getting fetched.
+void
+Percent_repeat_iterator::next_element (bool side_effect)
+{
+ // Do nothing if we already did our processing here.
+ if (!scm_is_pair (child_list_))
+ {
+ Sequential_iterator::next_element (side_effect);
+ return;
+ }
+
Music *mus = get_music ();
+
Music *child = Repeated_music::body (mus);
SCM length = child->get_length ().smobbed_copy ();
+
+ int current_bar = -1;
+ if (!measure_position (get_outlet ()).main_part_)
+ current_bar =
+ robust_scm2int (get_outlet ()->get_property ("internalBarNumber"), 0);
+
SCM child_list = SCM_EOL;
+ string event_type;
+ SCM slash_count = SCM_EOL;
+
+ if (starting_bar_ >= 0 && current_bar == starting_bar_ + 1)
+ event_type = "PercentEvent";
+ else if (starting_bar_ >=0 && current_bar == starting_bar_ + 2)
+ event_type = "DoublePercentEvent";
+ else
+ {
+ slash_count = Lily::calc_repeat_slash_count (child->self_scm ());
+ event_type = "RepeatSlashEvent";
+ }
+
int repeats = scm_to_int (mus->get_property ("repeat-count"));
for (int i = repeats; i > 1; i--)
- {
- Music *percent = make_music_by_name (ly_symbol2scm ("PercentEvent"));
- percent->set_spot (*mus->origin ());
- percent->set_property ("length", length);
- if (repeats > 1)
- percent->set_property ("repeat-count", scm_int2num (i));
-
- child_list = scm_cons (percent->unprotect (), child_list);
- }
-
- child_list = scm_cons (child->self_scm (), child_list);
-
- return child_list;
+ {
+ Music *percent = make_music_by_name (ly_symbol2scm (event_type.c_str ()));
+ percent->set_spot (*mus->origin ());
+ percent->set_property ("length", length);
+ if (repeats > 1)
+ {
+ percent->set_property ("repeat-count", scm_from_int (i));
+ if (event_type == "RepeatSlashEvent")
+ percent->set_property ("slash-count", slash_count);
+ }
+
+ child_list = scm_cons (percent->unprotect (), child_list);
+ }
+
+ scm_set_cdr_x (child_list_, child_list);
+ child_list_ = SCM_EOL;
+
+ Sequential_iterator::next_element (side_effect);
}