lily/stream-event.cc

   1 /*
   2   This file is part of LilyPond, the GNU music typesetter.
   3
   4   Copyright (C) 2005--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 #include "ly-smobs.icc"
  23 #include "context.hh"
  24 #include "input.hh"
  25 #include "input.hh"
  26
  27 /* TODO: Rename Stream_event -> Event */
  28
  29 Stream_event::Stream_event ()
  30   : Prob (ly_symbol2scm ("Stream_event"), SCM_EOL)
  31 {
  32 }
  33
  34 Stream_event::Stream_event (SCM event_class, SCM mutable_props)
  35   : Prob (ly_symbol2scm ("Stream_event"),
  36           scm_list_1 (scm_cons (ly_symbol2scm ("class"), event_class)))
  37 {
  38   mutable_property_alist_ = mutable_props;
  39 }
  40
  41 Stream_event::Stream_event (SCM class_name, Input *origin)
  42   : Prob (ly_symbol2scm ("Stream_event"),
  43           scm_list_1 (scm_cons (ly_symbol2scm ("class"), class_name)))
  44 {
  45   if (origin)
  46     set_spot (origin);
  47 }
  48
  49 SCM
  50 Stream_event::copy_mutable_properties () const
  51 {
  52   return ly_event_deep_copy (mutable_property_alist_);
  53 }
  54
  55 Input *
  56 Stream_event::origin () const
  57 {
  58   Input *i = unsmob_input (get_property ("origin"));
  59   return i ? i : &dummy_input_global;
  60 }
  61
  62 void
  63 Stream_event::set_spot (Input *i)
  64 {
  65   set_property ("origin", make_input (*i));
  66 }
  67
  68 bool
  69 Stream_event::internal_in_event_class (SCM class_name)
  70 {
  71   SCM cl = get_property ("class");
  72   cl = scm_call_1 (ly_lily_module_constant ("ly:make-event-class"), cl);
  73   return scm_c_memq (class_name, cl) != SCM_BOOL_F;
  74 }
  75
  76 IMPLEMENT_TYPE_P (Stream_event, "ly:stream-event?");
  77
  78 MAKE_SCHEME_CALLBACK (Stream_event, undump, 1);
  79 MAKE_SCHEME_CALLBACK (Stream_event, dump, 1);
  80
  81 SCM
  82 Stream_event::dump (SCM self)
  83 {
  84   Stream_event *ev = unsmob_stream_event (self);
  85   // Reversed alists look prettier.
  86   return scm_cons (scm_reverse (ev->immutable_property_alist_),
  87                    scm_reverse (ev->mutable_property_alist_));
  88 }
  89
  90 SCM
  91 Stream_event::undump (SCM data)
  92 {
  93   Stream_event *obj = new Stream_event ();
  94   obj->immutable_property_alist_ = scm_reverse (scm_car (data));
  95   obj->mutable_property_alist_ = scm_reverse (scm_cdr (data));
  96   return obj->unprotect ();
  97 }
  98
  99 Stream_event *
 100 unsmob_stream_event (SCM m)
 101 {
 102   return dynamic_cast<Stream_event*> (unsmob_prob (m));
 103 }