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// -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 2 -*-
/* Copyright (C) 2007 The glibmm 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, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <glibmm/object.h>
#include <glibmm/arrayhandle.h>
#include <glibmm/listhandle.h>
#include <giomm/asyncresult.h>
#include <giomm/cancellable.h>
#include <giomm/fileinfo.h>
//#include <giomm/file.h>
_DEFS(giomm,gio)
_PINCLUDE(glibmm/private/object_p.h)
namespace Gio
{
class File;
//TODO: Consider wrapping this like a std::iterator (or at least renaming it), though the asyncness probably makes that unsuitable.
/** Enumerated Files Routines.
* FileEnumerator allows you to operate on a set of Gio::Files, returning a Gio::FileInfo instance for each file enumerated
* (e.g. Gio::File::enumerate_children() will return a FileEnumerator for each of the children within a directory).
*
* To get the next file's information from a Gio::FileEnumerator, use next_file() or its asynchronous version, next_file_async().
* Note that the asynchronous version will return a list of Gio::FileInfos, whereas the synchronous version will only return the next
* file in the enumerator.
*
* To close a Gio::FileEnumerator, use FileEnumerator::close(), or its asynchronous version, close_async(). Once a FileEnumerator is closed,
* no further actions may be performed on it.
*
* @since{2,16}
*/
class FileEnumerator : public Glib::Object
{
_CLASS_GOBJECT(FileEnumerator, GFileEnumerator, G_FILE_ENUMERATOR, Glib::Object, GObject)
public:
_WRAP_METHOD(Glib::RefPtr<FileInfo> next_file(const Glib::RefPtr<Cancellable>& cancellable),
g_file_enumerator_next_file,
errthrow)
/**
* @return A FileInfo or an empty RefPtr on error or end of enumerator.
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
Glib::RefPtr<FileInfo> next_file();
#else
Glib::RefPtr<FileInfo> next_file(std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
_WRAP_METHOD(bool close(const Glib::RefPtr<Cancellable>& cancellable),
g_file_enumerator_close,
errthrow)
/** Releases all resources used by this enumerator, making the
* enumerator throw a Gio::Error with CLOSED on all calls.
*
* This will be automatically called when the last reference
* is dropped, but you might want to call this method to make sure resources
* are released as early as possible.
* @return #<tt>true</tt> on success or an empty RefPtr on error.
*/
#ifdef GLIBMM_EXCEPTIONS_ENABLED
bool close();
#else
bool close(std::auto_ptr<Glib::Error>& error);
#endif //GLIBMM_EXCEPTIONS_ENABLED
/** Request information for a number of files from the enumerator asynchronously.
* When all I/O for the operation is finished the callback slot will be called with the requested information.
*
* The callback could be called with less than num_files files in case of error or at the end of the enumerator.
* In case of a partial error the callback will be called with any succeeding items and no error, and on the next request the error will be reported.
* If a request is cancelled the callback will be called with ERROR_CANCELLED.
*
* During an async request no other sync and async calls are allowed, and will result in ERROR_PENDING errors.
*
* Any outstanding I/O request with higher priority (lower numerical value) will be executed before an outstanding request with lower priority.
* The default priority is PRIORITY_DEFAULT.
* @param slot A callback to call when the request is satisfied.
* @param cancellable An cancellable object which can be used to cancel the request.
* @param num_files The number of file info objects to request.
* @param io_priority The I/O priority of the request.
*/
void next_files_async(const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable, int num_files = 1, int io_priority = Glib::PRIORITY_DEFAULT);
/** Request information for a number of files from the enumerator asynchronously.
* When all I/O for the operation is finished the callback slot will be called with the requested information.
*
* The callback could be called with less than num_files files in case of error or at the end of the enumerator.
* In case of a partial error the callback will be called with any succeeding items and no error, and on the next request the error will be reported.
* If a request is cancelled the callback will be called with ERROR_CANCELLED.
*
* During an async request no other sync and async calls are allowed, and will result in ERROR_PENDING errors.
*
* Any outstanding I/O request with higher priority (lower numerical value) will be executed before an outstanding request with lower priority.
* The default priority is PRIORITY_DEFAULT.
* @param slot A callback to call when the request is satisfied.
* @param num_files The number of file info objects to request.
* @param io_priority The I/O priority of the request.
*/
void next_files_async(const SlotAsyncReady& slot, int num_files = 1, int io_priority = Glib::PRIORITY_DEFAULT);
_IGNORE(g_file_enumerator_next_files_async)
#m4 _CONVERSION(`GList*',`Glib::ListHandle< Glib::RefPtr<FileInfo> >', `$2(($3), Glib::OWNERSHIP_DEEP)')
_WRAP_METHOD(Glib::ListHandle< Glib::RefPtr<FileInfo> > next_files_finish(const Glib::RefPtr<AsyncResult>& result),
g_file_enumerator_next_files_finish,
errthrow)
/** Asynchronously closes the file enumerator.
*
* See close(), which is the synchronous version of this function.
*
* 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 by close_finish().
*
* @param io_priority The I/O priority of the request.
* @param cancellable A Cancellable object which can be used to cancel the operation.
* @param slot A callback to call when the request is satisfied.
*/
void close_async(int io_priority, const Glib::RefPtr<Cancellable>& cancellable, const SlotAsyncReady& slot);
/** Asynchronously closes the file enumerator.
*
* See close(), which is the synchronous version of this function.
*
* @param io_priority The I/O priority of the request.
* @param slot A callback to call when the request is satisfied.
*/
void close_async(int io_priority, const SlotAsyncReady& slot);
_IGNORE(g_file_enumerator_close_async)
_WRAP_METHOD(bool close_finish(const Glib::RefPtr<AsyncResult>& result),
g_file_enumerator_close_finish,
errthrow)
_WRAP_METHOD(bool is_closed() const, g_file_enumerator_is_closed)
_WRAP_METHOD(bool has_pending() const, g_file_enumerator_has_pending)
_WRAP_METHOD(void set_pending(bool pending = true), g_file_enumerator_set_pending)
_WRAP_METHOD(Glib::RefPtr<File> get_container(), g_file_enumerator_get_container, refreturn)
_WRAP_METHOD(Glib::RefPtr<const File> get_container() const, g_file_enumerator_get_container, refreturn)
};
} // namespace Gio
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