atk/atkstreamablecontent.c

   1 /* ATK -  Accessibility Toolkit
   2  * Copyright 2001 Sun Microsystems Inc.
   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 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
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include "atkstreamablecontent.h"
  21
  22 GType
  23 atk_streamable_content_get_type (void)
  24 {
  25   static GType type = 0;
  26
  27   if (!type) {
  28     GTypeInfo tinfo =
  29     {
  30       sizeof (AtkStreamableContentIface),
  31       (GBaseInitFunc) NULL,
  32       (GBaseFinalizeFunc) NULL,
  33
  34     };
  35
  36     type = g_type_register_static (G_TYPE_INTERFACE, "AtkStreamableContent", &tinfo, 0);
  37   }
  38
  39   return type;
  40 }
  41
  42 /**
  43  * atk_streamable_content_get_n_mime_types:
  44  * @streamable: a GObject instance that implements AtkStreamableContentIface
  45  *
  46  * Gets the number of mime types supported by this object.
  47  *
  48  * Returns: a gint which is the number of mime types supported by the object.
  49  **/
  50 gint
  51 atk_streamable_content_get_n_mime_types (AtkStreamableContent *streamable)
  52 {
  53   AtkStreamableContentIface *iface;
  54
  55   g_return_val_if_fail (ATK_IS_STREAMABLE_CONTENT (streamable), 0);
  56
  57   iface = ATK_STREAMABLE_CONTENT_GET_IFACE (streamable);
  58
  59   if (iface->get_n_mime_types)
  60     return (iface->get_n_mime_types) (streamable);
  61   else
  62     return 0;
  63 }
  64
  65 /**
  66  * atk_streamable_content_get_mime_type:
  67  * @streamable: a GObject instance that implements AtkStreamableContent
  68  * @i: a gint representing the position of the mime type starting from 0
  69  *
  70  * Gets the character string of the specified mime type. The first mime
  71  * type is at position 0, the second at position 1, and so on.
  72  *
  73  * Returns : a gchar* representing the specified mime type; the caller
  74  * should not free the character string.
  75  **/
  76 G_CONST_RETURN gchar*
  77 atk_streamable_content_get_mime_type (AtkStreamableContent *streamable,
  78                                       gint                 i)
  79 {
  80   AtkStreamableContentIface *iface;
  81
  82   g_return_val_if_fail (i >= 0, NULL);
  83   g_return_val_if_fail (ATK_IS_STREAMABLE_CONTENT (streamable), NULL);
  84
  85   iface = ATK_STREAMABLE_CONTENT_GET_IFACE (streamable);
  86
  87   if (iface->get_mime_type)
  88     return (iface->get_mime_type) (streamable, i);
  89   else
  90     return NULL;
  91 }
  92
  93 /**
  94  * atk_streamable_content_get_stream:
  95  * @streamable: a GObject instance that implements AtkStreamableContentIface
  96  * @mime_type: a gchar* representing the mime type
  97  *
  98  * Gets the content in the specified mime type.
  99  *
 100  * Returns: A #GIOChannel which contains the content in the specified mime
 101  * type.
 102  **/
 103 GIOChannel*
 104 atk_streamable_content_get_stream (AtkStreamableContent *streamable,
 105                                    const gchar          *mime_type)
 106 {
 107   AtkStreamableContentIface *iface;
 108
 109   g_return_val_if_fail (mime_type != NULL, NULL);
 110   g_return_val_if_fail (ATK_IS_STREAMABLE_CONTENT (streamable), NULL);
 111
 112   iface = ATK_STREAMABLE_CONTENT_GET_IFACE (streamable);
 113
 114   if (iface->get_stream)
 115     return (iface->get_stream) (streamable, mime_type);
 116   else
 117     return NULL;
 118 }