lily/stream-event-scheme.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2006--2010 Erik Sandberg  <mandolaerik@gmail.com>
   5
   6   LilyPond is free software: you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published by
   8   the Free Software Foundation, either version 3 of the License, or
   9   (at your option) any later version.
  10
  11   LilyPond is distributed in the hope that it will be useful,
  12   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14   GNU General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with LilyPond.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "stream-event.hh"
  21
  22 LY_DEFINE (ly_make_stream_event, "ly:make-stream-event",
  23            1, 1, 0, (SCM cl, SCM proplist),
  24            "Create a stream event of class @var{cl} with the given"
  25            " mutable property list.")
  26 {
  27   LY_ASSERT_TYPE (ly_is_symbol, cl, 1);
  28
  29   /* should be scm_list_p, but scm_list_p is expensive. */
  30   LY_ASSERT_TYPE (scm_is_pair, proplist, 2);
  31
  32   if (proplist == SCM_UNDEFINED)
  33     proplist = SCM_EOL;
  34
  35   Stream_event *e = new Stream_event (cl, proplist);
  36   return e->unprotect ();
  37 }
  38
  39 LY_DEFINE (ly_event_property, "ly:event-property",
  40            2, 0, 0, (SCM sev, SCM sym),
  41            "Get the property @var{sym} of stream event @var{mus}."
  42            "  If @var{sym} is undefined, return @code{'()}.")
  43 {
  44   LY_ASSERT_SMOB (Stream_event, sev, 1);
  45   LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
  46
  47   Stream_event *e = unsmob_stream_event (sev);
  48
  49   return e->internal_get_property (sym);
  50 }
  51
  52 LY_DEFINE (ly_event_set_property_x, "ly:event-set-property!",
  53            3, 0, 0, (SCM ev, SCM sym, SCM val),
  54            "Set property @var{sym} in event @var{ev} to @var{val}.")
  55 {
  56   LY_ASSERT_SMOB (Stream_event, ev, 1);
  57   LY_ASSERT_TYPE (ly_is_symbol, sym, 2);
  58
  59   return ly_prob_set_property_x (ev, sym, val);
  60 }
  61
  62 LY_DEFINE (ly_event_deep_copy, "ly:event-deep-copy",
  63            1, 0, 0, (SCM m),
  64            "Copy @var{m} and all sub expressions of@tie{}@var{m}.")
  65 {
  66   SCM copy = m;
  67   if (Stream_event *ev = unsmob_stream_event (m))
  68     {
  69       ev = ev->clone ();
  70       copy = ev->unprotect ();
  71     }
  72   else if (scm_is_pair (m))
  73     copy = scm_cons (ly_event_deep_copy (scm_car (m)),
  74                      ly_event_deep_copy (scm_cdr (m)));
  75
  76   return copy;
  77 }