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// Copyright (c) 2011 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_PLUGINS_PPAPI_PPB_FILE_IO_IMPL_H_
#define WEBKIT_PLUGINS_PPAPI_PPB_FILE_IO_IMPL_H_
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_callback_factory.h"
#include "base/memory/scoped_ptr.h"
#include "base/platform_file.h"
#include "ppapi/c/dev/pp_file_info_dev.h"
#include "ppapi/c/pp_time.h"
#include "webkit/plugins/ppapi/callbacks.h"
#include "webkit/plugins/ppapi/plugin_delegate.h"
#include "webkit/plugins/ppapi/resource.h"
struct PP_CompletionCallback;
struct PPB_FileIO_Dev;
struct PPB_FileIOTrusted_Dev;
namespace webkit {
namespace ppapi {
class PluginModule;
class PPB_FileRef_Impl;
class PPB_FileIO_Impl : public Resource {
public:
explicit PPB_FileIO_Impl(PluginInstance* instance);
virtual ~PPB_FileIO_Impl();
// 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.
virtual PPB_FileIO_Impl* AsPPB_FileIO_Impl();
// PPB_FileIO implementation.
int32_t Open(PPB_FileRef_Impl* 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);
private:
// Verifies:
// - that |callback| is valid (only nonblocking operation supported);
// - that the file is already open or not, depending on |should_be_open|; and
// - that no callback is already pending.
// Returns |PP_OK| to indicate that everything is valid or |PP_ERROR_...| if
// the call should be aborted and that code returned to the plugin.
int32_t CommonCallValidation(bool should_be_open,
PP_CompletionCallback callback);
// Sets up |callback| as the pending callback. This should only be called once
// it is certain that |PP_ERROR_WOULDBLOCK| will be returned.
void RegisterCallback(PP_CompletionCallback callback);
void RunPendingCallback(int32_t 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 ReadCallback(base::PlatformFileError error_code,
const char* data, int bytes_read);
void WriteCallback(base::PlatformFileError error_code, int bytes_written);
base::ScopedCallbackFactory<PPB_FileIO_Impl> callback_factory_;
base::PlatformFile file_;
PP_FileSystemType_Dev file_system_type_;
// Any pending callback for any PPB_FileIO(Trusted) call taking a callback.
scoped_refptr<TrackedCompletionCallback> callback_;
// Output buffer pointer for |Query()|; only non-null when a callback is
// pending for it.
PP_FileInfo_Dev* info_;
// Pointer back to the caller's read buffer; used by |Read()|. Not owned.
char* read_buffer_;
DISALLOW_COPY_AND_ASSIGN(PPB_FileIO_Impl);
};
} // namespace ppapi
} // namespace webkit
#endif // WEBKIT_PLUGINS_PPAPI_PPB_FILE_IO_IMPL_H_
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