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// Copyright (c) 2010 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 WEBKIT_GLUE_PLUGINS_PEPPER_FILE_IO_H_
#define WEBKIT_GLUE_PLUGINS_PEPPER_FILE_IO_H_

#include "base/file_path.h"
#include "base/platform_file.h"
#include "base/scoped_callback_factory.h"
#include "base/scoped_ptr.h"
#include "third_party/ppapi/c/dev/pp_file_info_dev.h"
#include "third_party/ppapi/c/pp_completion_callback.h"
#include "third_party/ppapi/c/pp_time.h"
#include "webkit/glue/plugins/pepper_plugin_delegate.h"
#include "webkit/glue/plugins/pepper_resource.h"

struct PP_CompletionCallback;
struct PP_FileInfo_Dev;
struct PPB_FileIO_Dev;
struct PPB_FileIOTrusted_Dev;

namespace pepper {

class PluginModule;

class FileIO : public Resource {
 public:
  explicit FileIO(PluginModule* module);
  virtual ~FileIO();

  // Returns a pointer to the interface implementing PPB_FileIO that is exposed
  // to the plugin.
  static const PPB_FileIO_Dev* GetInterface();

  // Returns a pointer to the interface implementing PPB_FileIOTrusted that is
  // exposed to the plugin.
  static const PPB_FileIOTrusted_Dev* GetTrustedInterface();

  // Resource overrides.
  FileIO* AsFileIO() { return this; }

  // PPB_FileIO implementation.
  int32_t Open(FileRef* file_ref,
               int32_t open_flags,
               PP_CompletionCallback callback);
  int32_t Query(PP_FileInfo_Dev* info,
                PP_CompletionCallback callback);
  int32_t Touch(PP_Time last_access_time,
                PP_Time last_modified_time,
                PP_CompletionCallback callback);
  int32_t Read(int64_t offset,
               char* buffer,
               int32_t bytes_to_read,
               PP_CompletionCallback callback);
  int32_t Write(int64_t offset,
                const char* buffer,
                int32_t bytes_to_write,
                PP_CompletionCallback callback);
  int32_t SetLength(int64_t length,
                    PP_CompletionCallback callback);
  int32_t Flush(PP_CompletionCallback callback);
  void Close();

  // PPB_FileIOTrusted implementation.
  int32_t GetOSFileDescriptor();
  int32_t WillWrite(int64_t offset,
                    int32_t bytes_to_write,
                    PP_CompletionCallback callback);
  int32_t WillSetLength(int64_t length,
                        PP_CompletionCallback callback);

  void RunPendingCallback(int result);
  void StatusCallback(base::PlatformFileError error_code);
  void AsyncOpenFileCallback(base::PlatformFileError error_code,
                             base::PlatformFile file);
  void QueryInfoCallback(base::PlatformFileError error_code,
                         const base::PlatformFileInfo& file_info);
  void ReadWriteCallback(base::PlatformFileError error_code,
                         int bytes_read_or_written);

 private:
  PluginDelegate* delegate_;
  base::ScopedCallbackFactory<FileIO> callback_factory_;

  base::PlatformFile file_;
  PP_FileSystemType_Dev file_system_type_;

  PP_CompletionCallback callback_;
  PP_FileInfo_Dev* info_;
};

}  // namespace pepper

#endif  // WEBKIT_GLUE_PLUGINS_PEPPER_FILE_IO_H_