/*
  This file is part of LilyPond, the GNU music typesetter.

  Copyright (C) 2006--2020 Erik Sandberg  <mandolaerik@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
  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 "stream-event.hh"

LY_DEFINE (ly_stream_event_p, "ly:stream-event?",
           1, 0, 0, (SCM obj),
           "Is @code{@var{obj}} a @code{Stream_event} object?")
{
  return scm_from_bool (unsmob<Stream_event> (obj));
}

LY_DEFINE (ly_make_stream_event, "ly:make-stream-event",
           1, 1, 0, (SCM cl, SCM proplist),
           "Create a stream event of class @var{cl} with the given"
           " mutable property list.")
{
  LY_ASSERT_TYPE (ly_is_pair, cl, 1);

  /* should be scm_list_p, but scm_list_p is expensive. */
  LY_ASSERT_TYPE (scm_is_pair, proplist, 2);

  if (SCM_UNBNDP (proplist))
    proplist = SCM_EOL;

  Stream_event *e = new Stream_event (cl, proplist);
  return e->unprotect ();
}

LY_DEFINE (ly_event_property, "ly:event-property",
           2, 1, 0, (SCM sev, SCM sym, SCM val),
           "Get the property @var{sym} of stream event @var{sev}."
           "  If @var{sym} is undefined, return @var{val} or"
           " @code{'()} if @var{val} is not specified.")
{
  LY_ASSERT_SMOB (Stream_event, sev, 1);
  return ly_prob_property (sev, sym, val);
}

LY_DEFINE (ly_event_set_property_x, "ly:event-set-property!",
           3, 0, 0, (SCM ev, SCM sym, SCM val),
           "Set property @var{sym} in event @var{ev} to @var{val}.")
{
  LY_ASSERT_SMOB (Stream_event, ev, 1);
  LY_ASSERT_TYPE (ly_is_symbol, sym, 2);

  return ly_prob_set_property_x (ev, sym, val);
}

LY_DEFINE (ly_event_deep_copy, "ly:event-deep-copy",
           1, 0, 0, (SCM m),
           "Copy @var{m} and all sub expressions of@tie{}@var{m}.")
{
  SCM copy = m;
  if (Stream_event *ev = unsmob<Stream_event> (m))
    {
      ev = ev->clone ();
      copy = ev->unprotect ();
    }
  else if (scm_is_pair (m))
    copy = scm_cons (ly_event_deep_copy (scm_car (m)),
                     ly_event_deep_copy (scm_cdr (m)));

  return copy;
}
