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 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 BorderValue_h
26#define BorderValue_h
27
28#include "Color.h"
29#include "RenderStyleConstants.h"
30
31namespace WebCore {
32
33class BorderValue {
34friend class RenderStyle;
35public:
36    BorderValue()
37        : m_width(3)
38        , m_color(0)
39        , m_colorIsValid(false)
40        , m_style(BNONE)
41        , m_isAuto(AUTO_OFF)
42    {
43    }
44
45    bool nonZero(bool checkStyle = true) const
46    {
47        return width() && (!checkStyle || m_style != BNONE);
48    }
49
50    bool isTransparent() const
51    {
52        return m_colorIsValid && !alphaChannel(m_color);
53    }
54
55    bool isVisible(bool checkStyle = true) const
56    {
57        return nonZero(checkStyle) && !isTransparent() && (!checkStyle || m_style != BHIDDEN);
58    }
59
60    bool operator==(const BorderValue& o) const
61    {
62        return m_width == o.m_width && m_style == o.m_style && m_color == o.m_color && m_colorIsValid == o.m_colorIsValid;
63    }
64
65    bool operator!=(const BorderValue& o) const
66    {
67        return !(*this == o);
68    }
69
70    void setColor(const Color& color)
71    {
72        m_color = color.rgb();
73        m_colorIsValid = color.isValid();
74    }
75
76    Color color() const { return Color(m_color, m_colorIsValid); }
77
78    float width() const { return m_width; }
79    EBorderStyle style() const { return static_cast<EBorderStyle>(m_style); }
80
81protected:
82    float m_width;
83    RGBA32 m_color;
84    unsigned m_colorIsValid : 1;
85
86    unsigned m_style : 4; // EBorderStyle
87
88    // This is only used by OutlineValue but moved here to keep the bits packed.
89    unsigned m_isAuto : 1; // OutlineIsAuto
90};
91
92} // namespace WebCore
93
94#endif // BorderValue_h
95