swfdec/swfdec_as_relay.c

   1 /* Swfdec
   2  * Copyright (C) 2008 Benjamin Otte <otte@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include <string.h>
  25
  26 #include "swfdec_as_relay.h"
  27 #include "swfdec_as_context.h"
  28 #include "swfdec_as_object.h"
  29 #include "swfdec_as_function.h"
  30
  31 G_DEFINE_ABSTRACT_TYPE (SwfdecAsRelay, swfdec_as_relay, SWFDEC_TYPE_GC_OBJECT)
  32
  33 static void
  34 swfdec_as_relay_mark (SwfdecGcObject *object)
  35 {
  36   SwfdecAsRelay *relay = SWFDEC_AS_RELAY (object);
  37
  38   if (relay->relay)
  39     swfdec_gc_object_mark (relay->relay);
  40
  41   SWFDEC_GC_OBJECT_CLASS (swfdec_as_relay_parent_class)->mark (object);
  42 }
  43
  44 static void
  45 swfdec_as_relay_class_init (SwfdecAsRelayClass *klass)
  46 {
  47   SwfdecGcObjectClass *gc_class = SWFDEC_GC_OBJECT_CLASS (klass);
  48
  49   gc_class->mark = swfdec_as_relay_mark;
  50 }
  51
  52 static void
  53 swfdec_as_relay_init (SwfdecAsRelay *object)
  54 {
  55 }
  56
  57 /**
  58  * swfdec_as_relay_get_as_object:
  59  * @object: a #SwfdecAsRelay.
  60  *
  61  * Gets the Actionscript object associated with this object.
  62  *
  63  * Returns: The #SwfdecAsObject associated with this relay.
  64  **/
  65 SwfdecAsObject *
  66 swfdec_as_relay_get_as_object (SwfdecAsRelay *relay)
  67 {
  68   g_return_val_if_fail (SWFDEC_IS_AS_RELAY (relay), NULL);
  69   g_return_val_if_fail (relay->relay != NULL, NULL);
  70
  71   return relay->relay;
  72 }
  73
  74 /**
  75  * swfdec_as_relay_call:
  76  * @object: a #SwfdecAsRelay
  77  * @name: garbage-collected string naming the function to call.
  78  * @argc: number of arguments to provide to function
  79  * @argv: arguments or %NULL when @argc is 0
  80  * @return_value: location to take the return value of the call or %NULL to
  81  *                ignore the return value.
  82  *
  83  * Calls the function named @name on the given object. This function is
  84  * essentially equal to the folloeing Actionscript code:
  85  * <informalexample><programlisting>
  86  * @return_value = @object.@name (@argv[0], ..., @argv[argc-1]);
  87  * </programlisting></informalexample>
  88  *
  89  * Returns: %TRUE if @object had a function with the given name, %FALSE otherwise
  90  **/
  91 gboolean
  92 swfdec_as_relay_call (SwfdecAsRelay *relay, const char *name, guint argc,
  93     SwfdecAsValue *argv, SwfdecAsValue *return_value)
  94 {
  95   SwfdecAsValue tmp;
  96   SwfdecAsFunction *fun;
  97
  98   g_return_val_if_fail (SWFDEC_IS_AS_RELAY (relay), TRUE);
  99   g_return_val_if_fail (name != NULL, TRUE);
 100   g_return_val_if_fail (argc == 0 || argv != NULL, TRUE);
 101   g_return_val_if_fail (swfdec_gc_object_get_context (relay)->global != NULL, TRUE); /* for SwfdecPlayer */
 102
 103   /* If this doesn't hold, we need to use swfdec_as_relay_get_as_object()
 104    * and have that function create the relay on demand. */
 105   g_assert (relay->relay);
 106
 107   if (return_value)
 108     SWFDEC_AS_VALUE_SET_UNDEFINED (return_value);
 109   swfdec_as_object_get_variable (relay->relay, name, &tmp);
 110   if (!SWFDEC_AS_VALUE_IS_OBJECT (&tmp))
 111     return FALSE;
 112   fun = (SwfdecAsFunction *) (SWFDEC_AS_VALUE_GET_OBJECT (&tmp)->relay);
 113   if (!SWFDEC_IS_AS_FUNCTION (fun))
 114     return FALSE;
 115   swfdec_as_function_call (fun, relay->relay, argc, argv, return_value ? return_value : &tmp);
 116
 117   return TRUE;
 118 }
 119