1 files changed, 95 insertions, 0 deletions
diff --git a/Source/WebCore/rendering/BorderEdge.cpp b/Source/WebCore/rendering/BorderEdge.cpp
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+++ b/Source/WebCore/rendering/BorderEdge.cpp
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+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "BorderEdge.h"
+
+#include "Color.h"
+#include "LayoutUnit.h"
+#include "RenderObject.h"
+#include "RenderStyle.h"
+
+namespace WebCore {
+
+BorderEdge::BorderEdge(float edgeWidth, Color edgeColor, EBorderStyle edgeStyle, bool edgeIsTransparent, bool edgeIsPresent, float devicePixelRatio)
+    : m_width(edgeWidth)
+    , m_color(edgeColor)
+    , m_style(edgeStyle)
+    , m_isTransparent(edgeIsTransparent)
+    , m_isPresent(edgeIsPresent)
+    , m_devicePixelRatio(devicePixelRatio)
+{
+    if (edgeStyle == DOUBLE && edgeWidth  < borderWidthInDevicePixel(3))
+        m_style = SOLID;
+    m_flooredToDevicePixelWidth = floorf(edgeWidth * devicePixelRatio) / devicePixelRatio;
+}
+
+void BorderEdge::getBorderEdgeInfo(BorderEdge edges[], const RenderStyle& style, float deviceScaleFactor, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
+{
+    bool horizontal = style.isHorizontalWritingMode();
+
+    edges[BSTop] = BorderEdge(style.borderTopWidth(), style.visitedDependentColor(CSSPropertyBorderTopColor), style.borderTopStyle(), style.borderTopIsTransparent(),
+        horizontal || includeLogicalLeftEdge, deviceScaleFactor);
+    edges[BSRight] = BorderEdge(style.borderRightWidth(), style.visitedDependentColor(CSSPropertyBorderRightColor), style.borderRightStyle(), style.borderRightIsTransparent(),
+        !horizontal || includeLogicalRightEdge, deviceScaleFactor);
+    edges[BSBottom] = BorderEdge(style.borderBottomWidth(), style.visitedDependentColor(CSSPropertyBorderBottomColor), style.borderBottomStyle(), style.borderBottomIsTransparent(),
+        horizontal || includeLogicalRightEdge, deviceScaleFactor);
+    edges[BSLeft] = BorderEdge(style.borderLeftWidth(), style.visitedDependentColor(CSSPropertyBorderLeftColor), style.borderLeftStyle(), style.borderLeftIsTransparent(),
+        !horizontal || includeLogicalLeftEdge, deviceScaleFactor);
+    }
+
+bool BorderEdge::obscuresBackgroundEdge(float scale) const
+{
+    if (!m_isPresent || m_isTransparent || (m_width * scale) < borderWidthInDevicePixel(2) || !m_color.isOpaque() || m_style == BHIDDEN)
+        return false;
+
+    if (m_style == DOTTED || m_style == DASHED)
+        return false;
+
+    if (m_style == DOUBLE)
+        return m_width >= scale * borderWidthInDevicePixel(5); // The outer band needs to be >= 2px wide at unit scale.
+
+    return true;
+}
+
+bool BorderEdge::obscuresBackground() const
+{
+    if (!m_isPresent || m_isTransparent || !m_color.isOpaque() || m_style == BHIDDEN)
+        return false;
+
+    if (m_style == DOTTED || m_style == DASHED || m_style == DOUBLE)
+        return false;
+
+    return true;
+}
+
+void BorderEdge::getDoubleBorderStripeWidths(LayoutUnit& outerWidth, LayoutUnit& innerWidth) const
+{
+    LayoutUnit fullWidth = widthForPainting();
+    innerWidth = ceilToDevicePixel(fullWidth * 2 / 3, m_devicePixelRatio);
+    outerWidth = floorToDevicePixel(fullWidth / 3, m_devicePixelRatio);
+}
+
+} // namespace WebCore