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/*
* Copyright (C) 2000 Lars Knoll (knoll@kde.org)
* (C) 2000 Antti Koivisto (koivisto@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
* Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef CollapsedBorderValue_h
#define CollapsedBorderValue_h
#include "core/style/BorderValue.h"
#include "wtf/Allocator.h"
namespace blink {
class CollapsedBorderValue {
DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
public:
CollapsedBorderValue()
: m_color(0),
m_colorIsCurrentColor(true),
m_width(0),
m_style(BorderStyleNone),
m_precedence(BorderPrecedenceOff),
m_transparent(false) {}
CollapsedBorderValue(const BorderValue& border,
const StyleColor& color,
EBorderPrecedence precedence)
: m_color(color.resolve(Color())),
m_colorIsCurrentColor(color.isCurrentColor()),
m_width(border.nonZero() ? border.width() : 0),
m_style(border.style()),
m_precedence(precedence),
m_transparent(border.isTransparent()) {}
unsigned width() const { return m_style > BorderStyleHidden ? m_width : 0; }
EBorderStyle style() const { return static_cast<EBorderStyle>(m_style); }
bool exists() const { return m_precedence != BorderPrecedenceOff; }
StyleColor color() const {
return m_colorIsCurrentColor ? StyleColor::currentColor()
: StyleColor(m_color);
}
bool isTransparent() const { return m_transparent; }
EBorderPrecedence precedence() const {
return static_cast<EBorderPrecedence>(m_precedence);
}
bool isSameIgnoringColor(const CollapsedBorderValue& o) const {
return width() == o.width() && style() == o.style() &&
precedence() == o.precedence();
}
bool visuallyEquals(const CollapsedBorderValue& o) const {
if (!isVisible() && !o.isVisible())
return true;
return color() == o.color() && isTransparent() == o.isTransparent() &&
isSameIgnoringColor(o);
}
bool isVisible() const {
return style() > BorderStyleHidden && !isTransparent() && exists();
}
bool shouldPaint(const CollapsedBorderValue& tableCurrentBorderValue) const {
return isVisible() && isSameIgnoringColor(tableCurrentBorderValue);
}
private:
Color m_color;
unsigned m_colorIsCurrentColor : 1;
unsigned m_width : 23;
unsigned m_style : 4; // EBorderStyle
unsigned m_precedence : 3; // EBorderPrecedence
unsigned m_transparent : 1;
};
} // namespace blink
#endif // CollapsedBorderValue_h
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