atk/atkdocument.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 "atkdocument.h"
  21
  22 enum {
  23   LOAD_COMPLETE,
  24   RELOAD,
  25   LOAD_STOPPED,
  26   LAST_SIGNAL
  27 };
  28
  29 static void atk_document_base_init (AtkDocumentIface *class);
  30
  31 static guint atk_document_signals[LAST_SIGNAL] = {0};
  32
  33 GType
  34 atk_document_get_type (void)
  35 {
  36   static GType type = 0;
  37
  38   if (!type) {
  39     static const GTypeInfo tinfo =
  40     {
  41       sizeof (AtkDocumentIface),
  42       (GBaseInitFunc) atk_document_base_init,
  43       (GBaseFinalizeFunc) NULL,
  44
  45     };
  46
  47     type = g_type_register_static (G_TYPE_INTERFACE, "AtkDocument", &tinfo, 0);
  48   }
  49
  50   return type;
  51 }
  52
  53 static void
  54 atk_document_base_init (AtkDocumentIface *class)
  55 {
  56   static gboolean initialized = FALSE;
  57   if (!initialized)
  58     {
  59       atk_document_signals[LOAD_COMPLETE] =
  60         g_signal_new ("load_complete",
  61                       ATK_TYPE_DOCUMENT,
  62                       G_SIGNAL_RUN_LAST,
  63                       0,
  64                       (GSignalAccumulator) NULL, NULL,
  65                       g_cclosure_marshal_VOID__VOID,
  66                       G_TYPE_NONE, 0);
  67       atk_document_signals[RELOAD] =
  68         g_signal_new ("reload",
  69                       ATK_TYPE_DOCUMENT,
  70                       G_SIGNAL_RUN_LAST,
  71                       0,
  72                       (GSignalAccumulator) NULL, NULL,
  73                       g_cclosure_marshal_VOID__VOID,
  74                       G_TYPE_NONE, 0);
  75       atk_document_signals[LOAD_STOPPED] =
  76         g_signal_new ("load_stopped",
  77                       ATK_TYPE_DOCUMENT,
  78                       G_SIGNAL_RUN_LAST,
  79                       0,
  80                       (GSignalAccumulator) NULL, NULL,
  81                       g_cclosure_marshal_VOID__VOID,
  82                       G_TYPE_NONE, 0);
  83
  84       initialized = TRUE;
  85     }
  86 }
  87
  88 /**
  89  * atk_document_get_document_type:
  90  * @document: a #GObject instance that implements AtkDocumentIface
  91  *
  92  * Gets a string indicating the document type.
  93  *
  94  * Returns: a string indicating the document type
  95  **/
  96 G_CONST_RETURN gchar*
  97 atk_document_get_document_type (AtkDocument *document)
  98 {
  99   AtkDocumentIface *iface;
 100
 101   g_return_val_if_fail (ATK_IS_DOCUMENT (document), NULL);
 102
 103   iface = ATK_DOCUMENT_GET_IFACE (document);
 104
 105   if (iface->get_document_type)
 106     {
 107       return (iface->get_document_type) (document);
 108     }
 109   else
 110     {
 111       return NULL;
 112     }
 113 }
 114
 115 /**
 116  * atk_document_get_document:
 117  * @document: a #GObject instance that implements AtkDocumentIface
 118  *
 119  * Gets a %gpointer that points to an instance of the DOM.  It is
 120  * up to the caller to check atk_document_get_type to determine
 121  * how to cast this pointer.
 122  *
 123  * Returns: (transfer none): a %gpointer that points to an instance of the DOM.
 124  **/
 125 gpointer
 126 atk_document_get_document (AtkDocument *document)
 127 {
 128   AtkDocumentIface *iface;
 129
 130   g_return_val_if_fail (ATK_IS_DOCUMENT (document), NULL);
 131
 132   iface = ATK_DOCUMENT_GET_IFACE (document);
 133
 134   if (iface->get_document)
 135     {
 136       return (iface->get_document) (document);
 137     }
 138   else
 139     {
 140       return NULL;
 141     }
 142 }
 143
 144 /**
 145  * atk_document_get_locale:
 146  * @document: a #GObject instance that implements AtkDocumentIface
 147  *
 148  * Gets a UTF-8 string indicating the POSIX-style LC_MESSAGES locale
 149  *          of the content of this document instance.  Individual
 150  *          text substrings or images within this document may have
 151  *          a different locale, see atk_text_get_attributes and
 152  *          atk_image_get_image_locale.
 153  *
 154  * Returns: a UTF-8 string indicating the POSIX-style LC_MESSAGES
 155  *          locale of the document content as a whole, or NULL if
 156  *          the document content does not specify a locale.
 157  **/
 158 G_CONST_RETURN gchar *
 159 atk_document_get_locale (AtkDocument *document)
 160 {
 161   AtkDocumentIface *iface;
 162
 163   g_return_val_if_fail (ATK_IS_DOCUMENT (document), NULL);
 164
 165   iface = ATK_DOCUMENT_GET_IFACE (document);
 166
 167   if (iface->get_document_locale)
 168     {
 169       return (iface->get_document_locale) (document);
 170     }
 171   else
 172     {
 173       return NULL;
 174     }
 175 }
 176
 177
 178 /**
 179  * atk_document_get_attributes:
 180  * @document: a #GObject instance that implements AtkDocumentIface
 181  *
 182  * Gets an AtkAttributeSet which describes document-wide
 183  *          attributes as name-value pairs.
 184  *
 185  * Since: 1.12
 186  *
 187  * Returns: (transfer none): An AtkAttributeSet containing the explicitly
 188  *          set name-value-pair attributes associated with this document
 189  *          as a whole.
 190  **/
 191 AtkAttributeSet *
 192 atk_document_get_attributes (AtkDocument *document)
 193 {
 194   AtkDocumentIface *iface;
 195
 196   g_return_val_if_fail (ATK_IS_DOCUMENT (document), NULL);
 197
 198   iface = ATK_DOCUMENT_GET_IFACE (document);
 199
 200   if (iface->get_document_attributes)
 201     {
 202       return (iface->get_document_attributes) (document);
 203     }
 204   else
 205     {
 206       return NULL;
 207     }
 208 }
 209
 210 /**
 211  * atk_document_get_attribute_value:
 212  * @document: a #GObject instance that implements AtkDocumentIface
 213  * @attribute_name: a character string representing the name of the attribute
 214  *            whose value is being queried.
 215  *
 216  * Since: 1.12
 217  *
 218  * Returns: a string value associated with the named attribute for this
 219  *    document, or NULL if a value for #attribute_name has not been specified
 220  *    for this document.
 221  */
 222 G_CONST_RETURN gchar *
 223 atk_document_get_attribute_value (AtkDocument *document,
 224                                   const gchar *attribute_name)
 225 {
 226   AtkDocumentIface *iface;
 227
 228   g_return_val_if_fail (ATK_IS_DOCUMENT (document), NULL);
 229
 230   iface = ATK_DOCUMENT_GET_IFACE (document);
 231
 232   if (iface->get_document_attribute_value)
 233     {
 234       return (iface->get_document_attribute_value) (document, attribute_name);
 235     }
 236   else
 237     {
 238       return NULL;
 239     }
 240 }
 241
 242 /**
 243  * atk_document_set_attribute_value:
 244  * @document: a #GObject instance that implements AtkDocumentIface
 245  * @attribute_name: a character string representing the name of the attribute
 246  *            whose value is being set.
 247  * @attribute_value: a string value to be associated with #attribute_name.
 248  *
 249  * Since: 1.12
 250  *
 251  * Returns: TRUE if #value is successfully associated with #attribute_name
 252  *          for this document, FALSE otherwise (e.g. if the document does not
 253  *          allow the attribute to be modified).
 254  */
 255 gboolean
 256 atk_document_set_attribute_value (AtkDocument *document,
 257                                   const gchar *attribute_name,
 258                                   const gchar *attribute_value)
 259 {
 260   AtkDocumentIface *iface;
 261
 262   g_return_val_if_fail (ATK_IS_DOCUMENT (document), FALSE);
 263
 264   iface = ATK_DOCUMENT_GET_IFACE (document);
 265
 266   if (iface->set_document_attribute)
 267     {
 268       return (iface->set_document_attribute) (document, attribute_name, attribute_value);
 269     }
 270   else
 271     {
 272       return FALSE;
 273     }
 274 }