Windows-4.7.4/src/3rdparty/webkit/WebCore/html/Blob.h

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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#ifndef Blob_h
#define Blob_h

#include "ExceptionCode.h"
#include "PlatformString.h"
#include <time.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class Blob : public RefCounted<Blob> {
public:
#if ENABLE(BLOB_SLICE)
    static const int toEndOfFile;
    static const double doNotCheckFileChange;
#endif

    static PassRefPtr<Blob> create(const String& path)
    {
        return adoptRef(new Blob(path));
    }

    virtual ~Blob() { }

#if ENABLE(BLOB_SLICE)
    PassRefPtr<Blob> slice(long long start, long long length) const;
#endif

    const String& path() const { return m_path; }
    unsigned long long size() const;
#if ENABLE(BLOB_SLICE)
    long long start() const { return m_start; }
    long long length() const { return m_length; }
    double modificationTime() const { return m_snapshotModificationTime; }
#endif

protected:
    Blob(const String& path);

private:
#if ENABLE(BLOB_SLICE)
    Blob(const String& path, long long start, long long length, long long snapshotSize, double snapshotModificationTime);
#endif

    // The underlying path of the file-based blob. 
    String m_path;

#if ENABLE(BLOB_SLICE)
    // The starting position of the file-based blob.
    long long m_start;

    // The length of the file-based blob. The value of -1 means to the end of the file.
    long long m_length;

    // A flag to tell if a snapshot has been captured.
    bool m_snapshotCaptured;

    // The size of the file when a snapshot is captured. It can be 0 if the file is empty.
    long long m_snapshotSize;

    // The last modification time of the file when a snapshot is captured. The value of 0 also means that the snapshot is not captured.
    double m_snapshotModificationTime;
#endif
};

} // namespace WebCore

#endif // Blob_h