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 ClipPathOperation_h
31#define ClipPathOperation_h
32
33#include "core/rendering/style/BasicShapes.h"
34#include "platform/graphics/Path.h"
35#include "wtf/OwnPtr.h"
36#include "wtf/PassOwnPtr.h"
37#include "wtf/RefCounted.h"
38#include "wtf/text/WTFString.h"
39
40namespace blink {
41
42class ClipPathOperation : public RefCounted<ClipPathOperation> {
43public:
44    enum OperationType {
45        REFERENCE,
46        SHAPE
47    };
48
49    virtual ~ClipPathOperation() { }
50
51    virtual bool operator==(const ClipPathOperation&) const = 0;
52    bool operator!=(const ClipPathOperation& o) const { return !(*this == o); }
53
54    OperationType type() const { return m_type; }
55    bool isSameType(const ClipPathOperation& o) const { return o.type() == m_type; }
56
57protected:
58    ClipPathOperation(OperationType type)
59        : m_type(type)
60    {
61    }
62
63    OperationType m_type;
64};
65
66class ReferenceClipPathOperation FINAL : public ClipPathOperation {
67public:
68    static PassRefPtr<ReferenceClipPathOperation> create(const String& url, const AtomicString& fragment)
69    {
70        return adoptRef(new ReferenceClipPathOperation(url, fragment));
71    }
72
73    const String& url() const { return m_url; }
74    const AtomicString& fragment() const { return m_fragment; }
75
76private:
77    virtual bool operator==(const ClipPathOperation& o) const OVERRIDE
78    {
79        return isSameType(o) && m_url == static_cast<const ReferenceClipPathOperation&>(o).m_url;
80    }
81
82    ReferenceClipPathOperation(const String& url, const AtomicString& fragment)
83        : ClipPathOperation(REFERENCE)
84        , m_url(url)
85        , m_fragment(fragment)
86    {
87    }
88
89    String m_url;
90    AtomicString m_fragment;
91};
92
93DEFINE_TYPE_CASTS(ReferenceClipPathOperation, ClipPathOperation, op, op->type() == ClipPathOperation::REFERENCE, op.type() == ClipPathOperation::REFERENCE);
94
95class ShapeClipPathOperation FINAL : public ClipPathOperation {
96public:
97    static PassRefPtr<ShapeClipPathOperation> create(PassRefPtr<BasicShape> shape)
98    {
99        return adoptRef(new ShapeClipPathOperation(shape));
100    }
101
102    const BasicShape* basicShape() const { return m_shape.get(); }
103    bool isValid() const { return m_shape.get(); }
104    WindRule windRule() const { return m_shape->windRule(); }
105    const Path& path(const FloatRect& boundingRect)
106    {
107        ASSERT(m_shape);
108        m_path.clear();
109        m_path = adoptPtr(new Path);
110        m_shape->path(*m_path, boundingRect);
111        return *m_path;
112    }
113
114private:
115    virtual bool operator==(const ClipPathOperation&) const OVERRIDE;
116
117    ShapeClipPathOperation(PassRefPtr<BasicShape> shape)
118        : ClipPathOperation(SHAPE)
119        , m_shape(shape)
120    {
121    }
122
123    RefPtr<BasicShape> m_shape;
124    OwnPtr<Path> m_path;
125};
126
127DEFINE_TYPE_CASTS(ShapeClipPathOperation, ClipPathOperation, op, op->type() == ClipPathOperation::SHAPE, op.type() == ClipPathOperation::SHAPE);
128
129inline bool ShapeClipPathOperation::operator==(const ClipPathOperation& o) const
130{
131    if (!isSameType(o))
132        return false;
133    BasicShape* otherShape = toShapeClipPathOperation(o).m_shape.get();
134    if (!m_shape.get() || !otherShape)
135        return static_cast<bool>(m_shape.get()) == static_cast<bool>(otherShape);
136    return *m_shape == *otherShape;
137}
138
139}
140
141#endif // ClipPathOperation_h
142