1/*
2 * Copyright (C) 2012 Adobe Systems Incorporated. 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 *
8 * 1. Redistributions of source code must retain the above
9 *    copyright notice, this list of conditions and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 *    copyright notice, this list of conditions and the following
13 *    disclaimer in the documentation and/or other materials
14 *    provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef ShapeValue_h
31#define ShapeValue_h
32
33#include "core/fetch/ImageResource.h"
34#include "core/rendering/style/BasicShapes.h"
35#include "core/rendering/style/RenderStyleConstants.h"
36#include "core/rendering/style/StyleImage.h"
37#include "wtf/PassRefPtr.h"
38
39namespace blink {
40
41class ShapeValue : public RefCounted<ShapeValue> {
42public:
43    enum ShapeValueType {
44        // The Auto value is defined by a null ShapeValue*
45        Shape,
46        Box,
47        Image
48    };
49
50    static PassRefPtr<ShapeValue> createShapeValue(PassRefPtr<BasicShape> shape, CSSBoxType cssBox)
51    {
52        return adoptRef(new ShapeValue(shape, cssBox));
53    }
54
55    static PassRefPtr<ShapeValue> createBoxShapeValue(CSSBoxType cssBox)
56    {
57        return adoptRef(new ShapeValue(cssBox));
58    }
59
60    static PassRefPtr<ShapeValue> createImageValue(PassRefPtr<StyleImage> image)
61    {
62        return adoptRef(new ShapeValue(image));
63    }
64
65    ShapeValueType type() const { return m_type; }
66    BasicShape* shape() const { return m_shape.get(); }
67
68    StyleImage* image() const { return m_image.get(); }
69    bool isImageValid() const
70    {
71        if (!image())
72            return false;
73        if (image()->isImageResource() || image()->isImageResourceSet())
74            return image()->cachedImage() && image()->cachedImage()->hasImage();
75        return image()->isGeneratedImage();
76    }
77    void setImage(PassRefPtr<StyleImage> image)
78    {
79        ASSERT(type() == Image);
80        if (m_image != image)
81            m_image = image;
82    }
83    CSSBoxType cssBox() const { return m_cssBox; }
84
85    bool operator==(const ShapeValue& other) const;
86
87private:
88    ShapeValue(PassRefPtr<BasicShape> shape, CSSBoxType cssBox)
89        : m_type(Shape)
90        , m_shape(shape)
91        , m_cssBox(cssBox)
92    {
93    }
94    ShapeValue(ShapeValueType type)
95        : m_type(type)
96        , m_cssBox(BoxMissing)
97    {
98    }
99    ShapeValue(PassRefPtr<StyleImage> image)
100        : m_type(Image)
101        , m_image(image)
102        , m_cssBox(ContentBox)
103    {
104    }
105    ShapeValue(CSSBoxType cssBox)
106        : m_type(Box)
107        , m_cssBox(cssBox)
108    {
109    }
110
111
112    ShapeValueType m_type;
113    RefPtr<BasicShape> m_shape;
114    RefPtr<StyleImage> m_image;
115    CSSBoxType m_cssBox;
116};
117
118inline bool ShapeValue::operator==(const ShapeValue& other) const
119{
120    if (type() != other.type())
121        return false;
122
123    switch (type()) {
124    case Shape:
125        return shape() == other.shape() && cssBox() == other.cssBox();
126    case Box:
127        return cssBox() == other.cssBox();
128    case Image:
129        return image() == other.image();
130    }
131
132    ASSERT_NOT_REACHED();
133    return false;
134}
135
136}
137
138#endif
139