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/* ATK - The Accessibility Toolkit for GTK+
 * Copyright 2001 Sun Microsystems Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "atktext.h"

struct _AtkTextIfaceClass
{
  GObjectClass parent;
};

typedef struct _AtkTextIfaceClass AtkTextIfaceClass;


GType
atk_text_get_type ()
{
  static GType type = 0;

  if (!type) {
    static const GTypeInfo tinfo =
    {
      sizeof (AtkTextIface),
      NULL,
      NULL,

    };

    type = g_type_register_static (G_TYPE_INTERFACE, "AtkText", &tinfo, 0);
  }

  return type;
}

gchar*
atk_text_get_text (AtkText      *text,
                   gint         start_offset,
                   gint         end_offset)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, NULL);
  g_return_val_if_fail (ATK_IS_TEXT (text), NULL);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_text)
    return (*(iface->get_text)) (text, start_offset, end_offset);
  else
    return NULL;
}

gunichar
atk_text_get_character_at_offset (AtkText      *text,
                                  gint         offset)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, (gunichar) 0);
  g_return_val_if_fail (ATK_IS_TEXT (text), (gunichar) 0);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_character_at_offset)
    return (*(iface->get_character_at_offset)) (text, offset);
  else
    return (gunichar) 0;
}

gchar*
atk_text_get_text_after_offset (AtkText          *text,
                                gint             offset,
                                AtkTextBoundary  boundary_type)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, NULL);
  g_return_val_if_fail (ATK_IS_TEXT (text), NULL);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_text_after_offset)
    return (*(iface->get_text_after_offset)) (text, offset, boundary_type);
  else
    return NULL;
}

gchar*
atk_text_get_text_at_offset (AtkText          *text,
                             gint             offset,
                             AtkTextBoundary  boundary_type)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, NULL);
  g_return_val_if_fail (ATK_IS_TEXT (text), NULL);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_text_at_offset)
    return (*(iface->get_text_at_offset)) (text, offset, boundary_type);
  else
    return NULL;
}

gchar*
atk_text_get_text_before_offset (AtkText          *text,
                                 gint             offset,
                                 AtkTextBoundary  boundary_type)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, NULL);
  g_return_val_if_fail (ATK_IS_TEXT (text), NULL);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_text_before_offset)
    return (*(iface->get_text_before_offset)) (text, offset, boundary_type);
  else
    return NULL;
}

gint
atk_text_get_caret_offset (AtkText *text)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, -1);
  g_return_val_if_fail (ATK_IS_TEXT (text), -1);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_caret_offset)
    return (*(iface->get_caret_offset)) (text);
  else
    return -1;
}

void
atk_text_get_row_col_at_offset (AtkText *text,
                                gint offset,
                                gint *row,
                                gint *col)
{
  AtkTextIface *iface;

  g_return_if_fail (text != NULL);
  g_return_if_fail (ATK_IS_TEXT (text));

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_row_col_at_offset)
    (*(iface->get_row_col_at_offset)) (text, offset, row, col);
  else
    {
      *row = 0;
      *col = 0;
    }
}

PangoAttrList*
atk_text_get_range_attributes (AtkText *text,
                               gint start_offset,
                               gint end_offset)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, NULL);
  g_return_val_if_fail (ATK_IS_TEXT (text), NULL);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_range_attributes)
    return (*(iface->get_range_attributes)) (text, start_offset, end_offset);
  else
    return NULL;
}

void
atk_text_get_character_extents (AtkText *text,
                                gint offset,
                                gint *x,
                                gint *y,
                                gint *length,
                                gint *width)
{
  AtkTextIface *iface;

  g_return_if_fail (text != NULL);
  g_return_if_fail (ATK_IS_TEXT (text));

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_character_extents)
    (*(iface->get_character_extents)) (text, offset, x, y, length, width);
  else
    {
      *x = 0;
      *x = 0;
      *length = 0;
      *width = 0;
    }
}

gint
atk_text_get_character_count (AtkText *text)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, -1);
  g_return_val_if_fail (ATK_IS_TEXT (text), -1);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_character_count)
    return (*(iface->get_character_count)) (text);
  else
    return -1;
}

gint
atk_text_get_offset_at_point (AtkText *text,
                              gint x,
                              gint y)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, -1);
  g_return_val_if_fail (ATK_IS_TEXT (text), -1);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_offset_at_point)
    return (*(iface->get_offset_at_point)) (text, x, y);
  else
    return -1;
}

gchar*
atk_text_get_selected_text (AtkText *text)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, NULL);
  g_return_val_if_fail (ATK_IS_TEXT (text), NULL);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_selected_text)
    return (*(iface->get_selected_text)) (text);
  else
    return NULL;
}

gboolean
atk_text_get_selection_bounds (AtkText *text,
                               gint    *start_offset,
                               gint    *end_offset)
{
  AtkTextIface *iface;

  g_return_val_if_fail (text != NULL, FALSE);
  g_return_val_if_fail (ATK_IS_TEXT (text), FALSE);

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->get_selection_bounds)
    return (*(iface->get_selection_bounds)) (text, start_offset, end_offset);
  else
  {
    *start_offset = 0;
    *end_offset = 0;
    return FALSE;
  }
}

void
atk_text_set_selection_bounds (AtkText *text,
                               gint    start_offset,
                               gint    end_offset)
{
  AtkTextIface *iface;

  g_return_if_fail (text != NULL);
  g_return_if_fail (ATK_IS_TEXT (text));

  iface = ATK_TEXT_GET_IFACE (text);

  if (iface->set_selection_bounds)
    (*(iface->set_selection_bounds)) (text, start_offset, end_offset);
}