/* Copyright (C) 2007 The gtkmm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <giomm/fileinfo.h>
#include <giomm/inputstream.h>
#include <giomm/seekable.h>
#include <glibmm/iochannel.h>
#include <glibmm/object.h>

_DEFS(giomm,gio)
_PINCLUDE(giomm/private/inputstream_p.h)

namespace Gio
{

/** FileInputStream provides input streams that take their content from a file.
 *
 * FileInputStream implements Seekable, which allows the input stream to jump to arbitrary positions in the file,
 * provided the file system of the file allows it.
 * Use the methods of the Seekable base class for seeking and positioning.
 *
 * @ingroup Streams
 *
 * @newin{2,16}
 */
class GIOMM_API FileInputStream
: public Gio::InputStream,
  public Seekable
{
  _CLASS_GOBJECT(FileInputStream, GFileInputStream, G_FILE_INPUT_STREAM, Gio::InputStream, GInputStream, , , GIOMM_API)
  _IMPLEMENTS_INTERFACE(Seekable)

public:

  /** Queries a file input stream the given @a attributes. This function blocks
   * while querying the stream. For the asynchronous (non-blocking) version
   * of this function, see query_info_async(). While the
   * stream is blocked, the stream will set the pending flag internally, and
   * any other operations on the stream will throw a Gio::Error with PENDING.
   *
   * @param attributes A file attribute query string.
   * @param cancellable A Cancellable object.
   * @return A FileInfo, or an empty RefPtr on error.
   */
  Glib::RefPtr<FileInfo> query_info(const Glib::RefPtr<Cancellable>& cancellable, const std::string& attributes = "*");

  /** Queries a file input stream the given @a attributes. This function blocks
   * while querying the stream. For the asynchronous (non-blocking) version
   * of this function, see query_info_async(). While the
   * stream is blocked, the stream will set the pending flag internally, and
   * any other operations on the stream will throw a Gio::Error with PENDING.
   *
   * @param attributes A file attribute query string.
   * @return A FileInfo, or an empty RefPtr on error.
   */
  Glib::RefPtr<FileInfo> query_info(const std::string& attributes = "*");
  _IGNORE(g_file_input_stream_query_info)


  /** Queries the stream information asynchronously. For the synchronous version of this function, see query_info().
   *
   * The operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled,
   * a Gio::Error with CANCELLED will be thrown.
   *
   * When the operation is finished, @a slot will be called. You can then call query_info_finish() to get the result of the operation.
   *
   * @param slot A callback slot which will be called when the request is satisfied.
   * @param cancellable A Cancellable object which can be used to cancel the operation.
   * @param attributes A file attribute query string.
   * @param io_priority The I/O priority of the request.
   */
  void query_info_async(const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable, const std::string& attributes = "*", int io_priority = Glib::PRIORITY_DEFAULT);

  /** Queries the stream information asynchronously. For the synchronous version of this function, see query_info().
   *
   * When the operation is finished, @a slot will be called. You can then call query_info_finish() to get the result of the operation.
   *
   * @param slot A callback slot which will be called when the request is satisfied.
   * @param attributes A file attribute query string.
   * @param io_priority The I/O priority of the request.
   */
  void query_info_async(const SlotAsyncReady& slot, const std::string& attributes = "*", int io_priority = Glib::PRIORITY_DEFAULT);

  _IGNORE(g_file_input_stream_query_info_async)

  _WRAP_METHOD(Glib::RefPtr<FileInfo> query_info_finish(const Glib::RefPtr<AsyncResult>& result),
               g_file_input_stream_query_info_finish,
               errthrow)
};

} // namespace Gio