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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_CPP_FILE_SYSTEM_H_
#define PPAPI_CPP_FILE_SYSTEM_H_
#include "ppapi/c/pp_file_info.h"
#include "ppapi/c/pp_instance.h"
#include "ppapi/c/pp_stdint.h"
#include "ppapi/c/pp_time.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/resource.h"
/// @file
/// This file defines the API to create a file system associated with a file.
namespace pp {
class CompletionCallback;
/// The <code>FileSystem</code> class identifies the file system type
/// associated with a file.
class FileSystem : public Resource {
public:
/// Constructs an is_null() filesystem resource. If you use this constructor,
/// you will have to assign it to a "real" FileSystem object before you can
/// use it.
FileSystem();
/// The copy constructor for <code>FileSystem</code>.
///
/// @param[in] other A reference to a <code>FileSystem</code>.
FileSystem(const FileSystem& other);
/// Constructs a <code>FileSystem</code> from a <code>Resource</code>.
///
/// @param[in] resource A <code>Resource</code> containing a file system.
explicit FileSystem(const Resource& resource);
/// A constructor used when you have received a PP_Resource as a return
/// value that has already been reference counted.
///
/// @param[in] resource A PP_Resource corresponding to a PPB_FileSystem.
FileSystem(PassRef, PP_Resource resource);
/// This constructor creates a file system object of the given type.
///
/// @param[in] instance The instance with which this resource will be
/// associated.
///
/// @param[in] type A file system type as defined by
/// <code>PP_FileSystemType</code> enum.
FileSystem(const InstanceHandle& instance, PP_FileSystemType type);
/// Open() opens the file system. A file system must be opened before running
/// any other operation on it.
///
/// @param[in] expected_size The expected size of the file system. Note that
/// this does not request quota; to do that, you must either invoke
/// requestQuota from JavaScript:
/// http://www.html5rocks.com/en/tutorials/file/filesystem/#toc-requesting-quota
/// or set the unlimitedStorage permission for Chrome Web Store apps:
/// http://code.google.com/chrome/extensions/manifest.html#permissions
///
/// @param[in] cc A <code>PP_CompletionCallback</code> to be called upon
/// completion of Open().
///
/// @return An int32_t containing an error code from <code>pp_errors.h</code>.
int32_t Open(int64_t expected_size, const CompletionCallback& cc);
/// Checks whether a <code>Resource</code> is a file system, to test whether
/// it is appropriate for use with the <code>FileSystem</code> constructor.
///
/// @param[in] resource A <code>Resource</code> to test.
///
/// @return True if <code>resource</code> is a file system.
static bool IsFileSystem(const Resource& resource);
};
} // namespace pp
#endif // PPAPI_CPP_FILE_SYSTEM_H_
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