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 "core/css/StyleColor.h"
29#include "core/rendering/style/RenderStyleConstants.h"
30#include "platform/graphics/Color.h"
31
32namespace blink {
33
34class BorderValue {
35friend class RenderStyle;
36public:
37    BorderValue()
38        : m_color(0)
39        , m_colorIsCurrentColor(true)
40        , m_width(3)
41        , m_style(BNONE)
42        , m_isAuto(AUTO_OFF)
43    {
44    }
45
46    bool nonZero(bool checkStyle = true) const
47    {
48        return width() && (!checkStyle || m_style != BNONE);
49    }
50
51    bool isTransparent() const
52    {
53        return !m_colorIsCurrentColor && !m_color.alpha();
54    }
55
56    bool isVisible(bool checkStyle = true) const
57    {
58        return nonZero(checkStyle) && !isTransparent() && (!checkStyle || m_style != BHIDDEN);
59    }
60
61    bool operator==(const BorderValue& o) const
62    {
63        return m_width == o.m_width && m_style == o.m_style && m_color == o.m_color && m_colorIsCurrentColor == o.m_colorIsCurrentColor;
64    }
65
66    // The default width is 3px, but if the style is none we compute a value of 0 (in RenderStyle itself)
67    bool visuallyEqual(const BorderValue& o) const
68    {
69        if (m_style == BNONE && o.m_style == BNONE)
70            return true;
71        if (m_style == BHIDDEN && o.m_style == BHIDDEN)
72            return true;
73        return *this == o;
74    }
75
76    bool operator!=(const BorderValue& o) const
77    {
78        return !(*this == o);
79    }
80
81    void setColor(const StyleColor& color)
82    {
83        m_color = color.resolve(Color());
84        m_colorIsCurrentColor = color.isCurrentColor();
85    }
86
87    StyleColor color() const { return m_colorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_color); }
88
89    unsigned width() const { return m_width; }
90
91    EBorderStyle style() const { return static_cast<EBorderStyle>(m_style); }
92    void setStyle(EBorderStyle style) { m_style = style; }
93
94protected:
95    Color m_color;
96    unsigned m_colorIsCurrentColor : 1;
97
98    unsigned m_width : 26;
99    unsigned m_style : 4; // EBorderStyle
100
101    // This is only used by OutlineValue but moved here to keep the bits packed.
102    unsigned m_isAuto : 1; // OutlineIsAuto
103};
104
105} // namespace blink
106
107#endif // BorderValue_h
108