98 lines
4.4 KiB
C++
98 lines
4.4 KiB
C++
/*
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* Copyright (C) 2014 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "BorderEdge.h"
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#include "Color.h"
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#include "LayoutUnit.h"
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#include "RenderObject.h"
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#include "RenderStyle.h"
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namespace WebCore {
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BorderEdge::BorderEdge(float edgeWidth, Color edgeColor, BorderStyle edgeStyle, bool edgeIsTransparent, bool edgeIsPresent, float devicePixelRatio)
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: m_color(edgeColor)
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, m_width(edgeWidth)
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, m_devicePixelRatio(devicePixelRatio)
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, m_style(edgeStyle)
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, m_isTransparent(edgeIsTransparent)
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, m_isPresent(edgeIsPresent)
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{
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if (edgeStyle == BorderStyle::Double && edgeWidth < borderWidthInDevicePixel(3))
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m_style = BorderStyle::Solid;
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m_flooredToDevicePixelWidth = floorf(edgeWidth * devicePixelRatio) / devicePixelRatio;
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}
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BorderEdges borderEdges(const RenderStyle& style, float deviceScaleFactor, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
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{
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bool horizontal = style.isHorizontalWritingMode();
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auto constructBorderEdge = [&](float width, CSSPropertyID borderColorProperty, BorderStyle borderStyle, bool isTransparent, bool isPresent) {
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return BorderEdge(width, style.visitedDependentColorWithColorFilter(borderColorProperty), borderStyle, isTransparent, isPresent, deviceScaleFactor);
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};
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return {
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constructBorderEdge(style.borderTopWidth(), CSSPropertyBorderTopColor, style.borderTopStyle(), style.borderTopIsTransparent(), horizontal || includeLogicalLeftEdge),
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constructBorderEdge(style.borderRightWidth(), CSSPropertyBorderRightColor, style.borderRightStyle(), style.borderRightIsTransparent(), !horizontal || includeLogicalRightEdge),
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constructBorderEdge(style.borderBottomWidth(), CSSPropertyBorderBottomColor, style.borderBottomStyle(), style.borderBottomIsTransparent(), horizontal || includeLogicalRightEdge),
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constructBorderEdge(style.borderLeftWidth(), CSSPropertyBorderLeftColor, style.borderLeftStyle(), style.borderLeftIsTransparent(), !horizontal || includeLogicalLeftEdge)
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};
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}
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bool BorderEdge::obscuresBackgroundEdge(float scale) const
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{
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if (!m_isPresent || m_isTransparent || (m_width * scale) < borderWidthInDevicePixel(2) || !m_color.isOpaque() || m_style == BorderStyle::Hidden)
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return false;
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if (m_style == BorderStyle::Dotted || m_style == BorderStyle::Dashed)
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return false;
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if (m_style == BorderStyle::Double)
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return m_width >= scale * borderWidthInDevicePixel(5); // The outer band needs to be >= 2px wide at unit scale.
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return true;
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}
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bool BorderEdge::obscuresBackground() const
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{
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if (!m_isPresent || m_isTransparent || !m_color.isOpaque() || m_style == BorderStyle::Hidden)
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return false;
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if (m_style == BorderStyle::Dotted || m_style == BorderStyle::Dashed || m_style == BorderStyle::Double)
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return false;
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return true;
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}
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void BorderEdge::getDoubleBorderStripeWidths(LayoutUnit& outerWidth, LayoutUnit& innerWidth) const
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{
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LayoutUnit fullWidth { widthForPainting() };
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innerWidth = ceilToDevicePixel(fullWidth * 2 / 3, m_devicePixelRatio);
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outerWidth = floorToDevicePixel(fullWidth / 3, m_devicePixelRatio);
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}
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} // namespace WebCore
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