1/*
2 * Copyright (C) 2006, 2007, 2008, 2009 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
20 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef ImageDocument_h
26#define ImageDocument_h
27
28#include "core/html/HTMLDocument.h"
29#include "wtf/RefPtr.h"
30
31namespace blink {
32
33class ImageResource;
34class HTMLImageElement;
35
36class ImageDocument FINAL : public HTMLDocument {
37public:
38    static PassRefPtrWillBeRawPtr<ImageDocument> create(const DocumentInit& initializer = DocumentInit())
39    {
40        return adoptRefWillBeNoop(new ImageDocument(initializer));
41    }
42
43    enum ScaleType {
44        ScaleZoomedDocument,
45        ScaleOnlyUnzoomedDocument
46    };
47
48    ImageResource* cachedImage();
49    HTMLImageElement* imageElement() const { return m_imageElement.get(); }
50
51    void windowSizeChanged(ScaleType);
52    void imageUpdated();
53    void imageClicked(int x, int y);
54
55    virtual void trace(Visitor*) OVERRIDE;
56
57private:
58    explicit ImageDocument(const DocumentInit&);
59
60    virtual PassRefPtrWillBeRawPtr<DocumentParser> createParser() OVERRIDE;
61#if !ENABLE(OILPAN)
62    virtual void dispose() OVERRIDE;
63#endif
64
65    void createDocumentStructure();
66    void resizeImageToFit(ScaleType);
67    void restoreImageSize(ScaleType);
68    bool imageFitsInWindow() const;
69    bool shouldShrinkToFit() const;
70    float scale() const;
71
72    RefPtrWillBeMember<HTMLImageElement> m_imageElement;
73
74    // Whether enough of the image has been loaded to determine its size
75    bool m_imageSizeIsKnown;
76
77    // Whether the image is shrunk to fit or not
78    bool m_didShrinkImage;
79
80    // Whether the image should be shrunk or not
81    bool m_shouldShrinkImage;
82};
83
84DEFINE_DOCUMENT_TYPE_CASTS(ImageDocument);
85
86}
87
88#endif // ImageDocument_h
89