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 ReadableDataObject_h
32#define ReadableDataObject_h
33
34#include "Clipboard.h"
35#include "PlatformString.h"
36#include <wtf/HashSet.h>
37#include <wtf/RefCounted.h>
38#include <wtf/RefPtr.h>
39#include <wtf/text/StringHash.h>
40
41namespace WebCore {
42
43// Used for one way communication of drag/drop and copy/paste data from the
44// browser to the renderer.
45class ReadableDataObject : public RefCounted<ReadableDataObject> {
46public:
47    static PassRefPtr<ReadableDataObject> create(Clipboard::ClipboardType);
48
49    bool hasData() const;
50    HashSet<String> types() const;
51    String getData(const String& type, bool& succeeded) const;
52
53    String urlTitle() const;
54    KURL htmlBaseUrl() const;
55
56    bool containsFilenames() const;
57    Vector<String> filenames() const;
58
59private:
60    explicit ReadableDataObject(Clipboard::ClipboardType);
61
62    // This isn't always const... but most of the time it is.
63    void ensureTypeCacheInitialized() const;
64
65    Clipboard::ClipboardType m_clipboardType;
66
67    // To avoid making a lot of IPC calls for each drag event, we cache some
68    // values in the renderer.
69    mutable HashSet<String> m_types;
70    mutable bool m_containsFilenames;
71    mutable bool m_isTypeCacheInitialized;
72};
73
74} // namespace WebCore
75
76#endif
77