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 "HTMLDocument.h"
29
30namespace WebCore {
31
32class CachedImage;
33class ImageDocumentElement;
34
35class ImageDocument FINAL : public HTMLDocument {
36public:
37    static PassRefPtr<ImageDocument> create(Frame* frame, const KURL& url)
38    {
39        return adoptRef(new ImageDocument(frame, url));
40    }
41
42    CachedImage* cachedImage();
43    ImageDocumentElement* imageElement() const { return m_imageElement; }
44    void disconnectImageElement() { m_imageElement = 0; }
45
46    void windowSizeChanged();
47    void imageUpdated();
48    void imageClicked(int x, int y);
49
50private:
51    ImageDocument(Frame*, const KURL&);
52
53    virtual PassRefPtr<DocumentParser> createParser();
54
55    void createDocumentStructure();
56    void resizeImageToFit();
57    void restoreImageSize();
58    bool imageFitsInWindow() const;
59    bool shouldShrinkToFit() const;
60    float scale() const;
61
62    ImageDocumentElement* m_imageElement;
63
64    // Whether enough of the image has been loaded to determine its size
65    bool m_imageSizeIsKnown;
66
67    // Whether the image is shrunk to fit or not
68    bool m_didShrinkImage;
69
70    // Whether the image should be shrunk or not
71    bool m_shouldShrinkImage;
72};
73
74inline ImageDocument* toImageDocument(Document* document)
75{
76    ASSERT_WITH_SECURITY_IMPLICATION(!document || document->isImageDocument());
77    return static_cast<ImageDocument*>(document);
78}
79
80inline const ImageDocument* toImageDocument(const Document* document)
81{
82    ASSERT_WITH_SECURITY_IMPLICATION(!document || document->isImageDocument());
83    return static_cast<const ImageDocument*>(document);
84}
85
86// This will catch anyone doing an unnecessary cast.
87void toImageDocument(const ImageDocument*);
88
89}
90
91#endif // ImageDocument_h
92