1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef Blob_h
32#define Blob_h
33
34#include "bindings/v8/ScriptWrappable.h"
35#include "core/html/URLRegistry.h"
36#include "core/platform/network/BlobData.h"
37#include "weborigin/KURL.h"
38#include "wtf/PassOwnPtr.h"
39#include "wtf/PassRefPtr.h"
40#include "wtf/RefCounted.h"
41#include "wtf/text/WTFString.h"
42
43namespace WebCore {
44
45class ScriptExecutionContext;
46
47class Blob : public ScriptWrappable, public URLRegistrable, public RefCounted<Blob> {
48public:
49    static PassRefPtr<Blob> create()
50    {
51        return adoptRef(new Blob);
52    }
53
54    static PassRefPtr<Blob> create(PassOwnPtr<BlobData> blobData, long long size)
55    {
56        return adoptRef(new Blob(blobData, size));
57    }
58
59    // For deserialization.
60    static PassRefPtr<Blob> create(const KURL& srcURL, const String& type, long long size)
61    {
62        return adoptRef(new Blob(srcURL, type, size));
63    }
64
65    virtual ~Blob();
66
67    const KURL& url() const { return m_internalURL; }
68    const String& type() const { return m_type; }
69
70    virtual unsigned long long size() const { return static_cast<unsigned long long>(m_size); }
71    virtual bool isFile() const { return false; }
72
73    // URLRegistrable
74    virtual URLRegistry& registry() const OVERRIDE;
75
76    PassRefPtr<Blob> slice(long long start = 0, long long end = std::numeric_limits<long long>::max(), const String& contentType = String()) const;
77
78protected:
79    Blob();
80    Blob(PassOwnPtr<BlobData>, long long size);
81
82    // For deserialization.
83    Blob(const KURL& srcURL, const String& type, long long size);
84
85    // This is an internal URL referring to the blob data associated with this object. It serves
86    // as an identifier for this blob. The internal URL is never used to source the blob's content
87    // into an HTML or for FileRead'ing, public blob URLs must be used for those purposes.
88    KURL m_internalURL;
89
90    String m_type;
91    long long m_size;
92};
93
94} // namespace WebCore
95
96#endif // Blob_h
97