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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 WEBKIT_RENDERER_FILEAPI_WEBFILEWRITER_BASE_H_
#define WEBKIT_RENDERER_FILEAPI_WEBFILEWRITER_BASE_H_
#include "base/platform_file.h"
#include "third_party/WebKit/public/web/WebFileWriter.h"
#include "url/gurl.h"
#include "webkit/renderer/webkit_storage_renderer_export.h"
namespace WebKit {
class WebFileWriterClient;
class WebURL;
}
namespace fileapi {
class WEBKIT_STORAGE_RENDERER_EXPORT WebFileWriterBase
: public NON_EXPORTED_BASE(WebKit::WebFileWriter) {
public:
WebFileWriterBase(
const GURL& path, WebKit::WebFileWriterClient* client);
virtual ~WebFileWriterBase();
// WebFileWriter implementation
virtual void truncate(long long length);
virtual void write(long long position, const WebKit::WebURL& blobURL);
virtual void cancel();
protected:
// This calls DidSucceed() or DidFail() based on the value of |error_code|.
void DidFinish(base::PlatformFileError error_code);
void DidWrite(int64 bytes, bool complete);
void DidSucceed();
void DidFail(base::PlatformFileError error_code);
// Derived classes must provide these methods to asynchronously perform
// the requested operation, and they must call the appropiate DidSomething
// method upon completion and as progress is made in the Write case.
virtual void DoTruncate(const GURL& path, int64 offset) = 0;
virtual void DoWrite(const GURL& path, const GURL& blob_url,
int64 offset) = 0;
virtual void DoCancel() = 0;
private:
enum OperationType {
kOperationNone,
kOperationWrite,
kOperationTruncate
};
enum CancelState {
kCancelNotInProgress,
kCancelSent,
kCancelReceivedWriteResponse,
};
void FinishCancel();
GURL path_;
WebKit::WebFileWriterClient* client_;
OperationType operation_;
CancelState cancel_state_;
};
} // namespace fileapi
#endif // WEBKIT_RENDERER_FILEAPI_WEBFILEWRITER_BASE_H_
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