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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef BlobItem_h
#define BlobItem_h
#include "PlatformString.h"
#include <wtf/OwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#include <wtf/text/CString.h>
namespace WebCore {
class ByteArrayBlobItem;
class DataBlobItem;
class DataRangeBlobItem;
class FileBlobItem;
class FileRangeBlobItem;
class StringBlobItem;
// A base interface for all arbitrary-data-object component items.
// The BlobItem and its subclasses are structured like the following:
// BlobItem
// |
// +-------> DataBlobItem
// | |
// | +---------> StringBlobItem
// | +---------> ByteArrayBlobItem
// | +---------> DataRangeBlobItem
// |
// +-------> FileBlobItem
// |
// +---------> FileRangeBlobItem
//
class BlobItem : public RefCounted<BlobItem> {
public:
virtual ~BlobItem() { }
virtual unsigned long long size() const = 0;
virtual const DataBlobItem* toDataBlobItem() const { return 0; }
virtual const StringBlobItem* toStringBlobItem() const { return 0; }
virtual const ByteArrayBlobItem* toByteArrayBlobItem() const { return 0; }
virtual const FileBlobItem* toFileBlobItem() const { return 0; }
#if ENABLE(BLOB_SLICE)
virtual const DataRangeBlobItem* toDataRangeBlobItem() const { return 0; }
virtual const FileRangeBlobItem* toFileRangeBlobItem() const { return 0; }
// Note: no external methods except for Blob::slice should call this.
virtual PassRefPtr<BlobItem> slice(long long start, long long length) = 0;
#endif // ENABLE(BLOB_SLICE)
protected:
BlobItem() { }
};
typedef Vector<RefPtr<BlobItem> > BlobItemList;
class DataBlobItem : public BlobItem {
public:
virtual const char* data() const = 0;
// BlobItem methods.
virtual const DataBlobItem* toDataBlobItem() const { return this; }
#if ENABLE(BLOB_SLICE)
virtual PassRefPtr<BlobItem> slice(long long start, long long length);
#endif // ENABLE(BLOB_SLICE)
};
class FileBlobItem : public BlobItem {
public:
static PassRefPtr<BlobItem> create(const String& path);
#if ENABLE(DIRECTORY_UPLOAD)
static PassRefPtr<BlobItem> create(const String& path, const String& relativePath);
#endif
virtual const String& name() const { return m_fileName; }
virtual const String& path() const { return m_path; }
#if ENABLE(DIRECTORY_UPLOAD)
const String& relativePath() const { return m_relativePath; }
#endif
// BlobItem methods.
virtual unsigned long long size() const;
virtual const FileBlobItem* toFileBlobItem() const { return this; }
#if ENABLE(BLOB_SLICE)
virtual PassRefPtr<BlobItem> slice(long long start, long long length);
#endif // ENABLE(BLOB_SLICE)
protected:
FileBlobItem(const String& path);
#if ENABLE(DIRECTORY_UPLOAD)
FileBlobItem(const String& path, const String& relativePath);
#endif
String m_path;
String m_fileName;
#if ENABLE(DIRECTORY_UPLOAD)
String m_relativePath;
#endif
};
class StringBlobItem : public DataBlobItem {
public:
static PassRefPtr<BlobItem> create(const CString&);
const CString& cstr() const { return m_data; }
// BlobItem methods.
virtual unsigned long long size() const { return m_data.length(); }
virtual const StringBlobItem* toStringBlobItem() const { return this; }
// DataBlobItem methods.
virtual const char* data() const { return m_data.data(); }
private:
StringBlobItem(const CString&);
CString m_data;
};
class ByteArrayBlobItem : public DataBlobItem {
public:
static PassRefPtr<BlobItem> create(const char* data, size_t size);
// BlobItem methods.
virtual unsigned long long size() const { return m_bytesArray.size(); }
virtual const ByteArrayBlobItem* toByteArrayBlobItem() const { return this; }
// DataBlobItem methods.
virtual const char* data() const { return m_bytesArray.data(); }
private:
ByteArrayBlobItem(const char* data, size_t size);
Vector<char> m_bytesArray;
};
#if ENABLE(BLOB_SLICE)
// BlobItem class for sliced data (string or bytes-array).
class DataRangeBlobItem : public DataBlobItem {
public:
static PassRefPtr<BlobItem> create(PassRefPtr<DataBlobItem>, long long start, long long length);
// BlobItem methods.
virtual unsigned long long size() const { return m_length; }
virtual const DataRangeBlobItem* toDataRangeBlobItem() const { return this; }
// DataBlobItem methods.
virtual const char* data() const;
private:
DataRangeBlobItem(PassRefPtr<DataBlobItem>, long long start, long long length);
RefPtr<DataBlobItem> m_item;
long long m_start;
long long m_length;
};
class FileRangeBlobItem : public FileBlobItem {
public:
static PassRefPtr<BlobItem> create(const String& path, long long start, long long length, double snapshotModificationTime);
long long start() const { return m_start; }
double snapshotModificationTime() const { return m_snapshotModificationTime; }
// BlobItem methods.
virtual unsigned long long size() const { return m_length; }
virtual const FileRangeBlobItem* toFileRangeBlobItem() const { return this; }
// FileBlobItem methods.
virtual const String& name() const { return m_uniqueName; }
private:
FileRangeBlobItem(const String& path, long long start, long long length, double snapshotModificationTime);
long long m_start;
long long m_length;
String m_uniqueName;
double m_snapshotModificationTime;
};
#endif // ENABLE(BLOB_SLICE)
} // namespace WebCore
#endif // BlobItem_h
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