1/*
2 * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3 *           (C) 2000 Antti Koivisto (koivisto@kde.org)
4 *           (C) 2000 Dirk Mueller (mueller@kde.org)
5 * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
6 * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB.  If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 *
23 */
24
25#ifndef ShadowData_h
26#define ShadowData_h
27
28#include "core/css/StyleColor.h"
29#include "core/platform/graphics/FloatRect.h"
30#include "core/platform/graphics/LayoutRect.h"
31#include "wtf/OwnPtr.h"
32#include "wtf/PassOwnPtr.h"
33
34namespace WebCore {
35
36enum ShadowStyle { Normal, Inset };
37
38// This class holds information about shadows for the text-shadow and box-shadow properties.
39class ShadowData {
40    WTF_MAKE_FAST_ALLOCATED;
41public:
42    static PassOwnPtr<ShadowData> create() { return adoptPtr(new ShadowData); }
43    static PassOwnPtr<ShadowData> create(const IntPoint& location, int blur, int spread, ShadowStyle style, const StyleColor& color)
44    {
45        return adoptPtr(new ShadowData(location, blur, spread, style, color));
46    }
47    // This clones the whole ShadowData linked list.
48    PassOwnPtr<ShadowData> clone() const
49    {
50        return adoptPtr(new ShadowData(*this));
51    }
52
53    bool operator==(const ShadowData&) const;
54    bool operator!=(const ShadowData& o) const { return !(*this == o); }
55
56    int x() const { return m_location.x(); }
57    int y() const { return m_location.y(); }
58    IntPoint location() const { return m_location; }
59    int blur() const { return m_blur; }
60    int spread() const { return m_spread; }
61    ShadowStyle style() const { return m_style; }
62    const StyleColor& color() const { return m_color; }
63
64    const ShadowData* next() const { return m_next.get(); }
65    void setNext(PassOwnPtr<ShadowData> shadow) { m_next = shadow; }
66
67    void adjustRectForShadow(LayoutRect&, int additionalOutlineSize = 0) const;
68    void adjustRectForShadow(FloatRect&, int additionalOutlineSize = 0) const;
69
70private:
71    ShadowData()
72        : m_blur(0)
73        , m_spread(0)
74        , m_style(Normal)
75    {
76    }
77
78    ShadowData(const IntPoint& location, int blur, int spread, ShadowStyle style, const StyleColor& color)
79        : m_location(location)
80        , m_blur(blur)
81        , m_spread(spread)
82        , m_color(color)
83        , m_style(style)
84    {
85    }
86
87    ShadowData(const ShadowData&);
88
89    IntPoint m_location;
90    int m_blur;
91    int m_spread;
92    StyleColor m_color;
93    ShadowStyle m_style;
94    OwnPtr<ShadowData> m_next;
95};
96
97// Helper method to handle nullptr, otherwise all callers need an ugly ternary.
98inline PassOwnPtr<ShadowData> cloneShadow(const ShadowData* shadow)
99{
100    return shadow ? shadow->clone() : nullptr;
101}
102
103inline PassOwnPtr<ShadowData> cloneShadow(const OwnPtr<ShadowData>& shadow)
104{
105    return cloneShadow(shadow.get());
106}
107
108} // namespace WebCore
109
110#endif // ShadowData_h
111