1/*
2 * Copyright (C) 2006 Rob Buis <buis@kde.org>
3 * Copyright (C) 2008 Apple Inc. All right reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#ifndef CSSCursorImageValue_h
22#define CSSCursorImageValue_h
23
24#include "CSSImageValue.h"
25#include "IntPoint.h"
26#include <wtf/HashSet.h>
27
28namespace WebCore {
29
30class Document;
31class Element;
32class SVGElement;
33
34class CSSCursorImageValue : public CSSValue {
35public:
36    static PassRefPtr<CSSCursorImageValue> create(PassRefPtr<CSSValue> imageValue, bool hasHotSpot, const IntPoint& hotSpot)
37    {
38        return adoptRef(new CSSCursorImageValue(imageValue, hasHotSpot, hotSpot));
39    }
40
41    ~CSSCursorImageValue();
42
43    bool hasHotSpot() const { return m_hasHotSpot; }
44
45    IntPoint hotSpot() const
46    {
47        if (m_hasHotSpot)
48            return m_hotSpot;
49        return IntPoint(-1, -1);
50    }
51
52    String customCssText() const;
53
54    bool updateIfSVGCursorIsUsed(Element*);
55    StyleImage* cachedImage(CachedResourceLoader*);
56    StyleImage* cachedOrPendingImage(Document*);
57
58#if ENABLE(SVG)
59    void removeReferencedElement(SVGElement*);
60#endif
61
62    bool equals(const CSSCursorImageValue&) const;
63
64private:
65    CSSCursorImageValue(PassRefPtr<CSSValue> imageValue, bool hasHotSpot, const IntPoint& hotSpot);
66
67    void detachPendingImage();
68
69#if ENABLE(SVG)
70    bool isSVGCursor() const;
71    String cachedImageURL();
72    void clearCachedImage();
73#endif
74
75    RefPtr<CSSValue> m_imageValue;
76
77    bool m_hasHotSpot;
78    IntPoint m_hotSpot;
79    RefPtr<StyleImage> m_image;
80    bool m_accessedImage;
81
82#if ENABLE(SVG)
83    HashSet<SVGElement*> m_referencedElements;
84#endif
85};
86
87} // namespace WebCore
88
89#endif // CSSCursorImageValue_h
90