webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WebCore/rendering/BorderEdge.h b/Source/WebCore/rendering/BorderEdge.h
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+++ b/Source/WebCore/rendering/BorderEdge.h
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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.
+ */
+
+#pragma once
+
+#include "Color.h"
+#include "LayoutUnit.h"
+#include "RenderObjectEnums.h"
+#include "RenderStyleConstants.h"
+
+namespace WebCore {
+
+typedef unsigned BorderEdgeFlags;
+
+class RenderStyle;
+
+class BorderEdge {
+public:
+    enum BorderEdgeFlag {
+        TopBorderEdge = 1 << BSTop,
+        RightBorderEdge = 1 << BSRight,
+        BottomBorderEdge = 1 << BSBottom,
+        LeftBorderEdge = 1 << BSLeft,
+        AllBorderEdges = TopBorderEdge | BottomBorderEdge | LeftBorderEdge | RightBorderEdge
+    };
+
+    BorderEdge() = default;
+    BorderEdge(float edgeWidth, Color edgeColor, EBorderStyle edgeStyle, bool edgeIsTransparent, bool edgeIsPresent, float devicePixelRatio);
+
+    static void getBorderEdgeInfo(BorderEdge edges[], const RenderStyle&, float deviceScaleFactor, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
+
+    EBorderStyle style() const { return m_style; }
+    const Color& color() const { return m_color; }
+    bool isTransparent() const { return m_isTransparent; }
+    bool isPresent() const { return m_isPresent; }
+
+    inline bool hasVisibleColorAndStyle() const { return m_style > BHIDDEN && !m_isTransparent; }
+    inline bool shouldRender() const { return m_isPresent && widthForPainting() && hasVisibleColorAndStyle(); }
+    inline bool presentButInvisible() const { return widthForPainting() && !hasVisibleColorAndStyle(); }
+    inline float widthForPainting() const { return m_isPresent ?  m_flooredToDevicePixelWidth : 0; }
+    void getDoubleBorderStripeWidths(LayoutUnit& outerWidth, LayoutUnit& innerWidth) const;
+    bool obscuresBackgroundEdge(float scale) const;
+    bool obscuresBackground() const;
+
+private:
+    inline float borderWidthInDevicePixel(int logicalPixels) const { return LayoutUnit(logicalPixels / m_devicePixelRatio).toFloat(); }
+
+    LayoutUnit m_width;
+    Color m_color;
+    EBorderStyle m_style { BHIDDEN };
+    bool m_isTransparent { false };
+    bool m_isPresent { false };
+    float m_flooredToDevicePixelWidth { 0 };
+    float m_devicePixelRatio { 1 };
+};
+
+inline bool edgesShareColor(const BorderEdge& firstEdge, const BorderEdge& secondEdge) { return firstEdge.color() == secondEdge.color(); }
+inline BorderEdge::BorderEdgeFlag edgeFlagForSide(BoxSide side) { return static_cast<BorderEdge::BorderEdgeFlag>(1 << side); }
+inline bool includesEdge(BorderEdgeFlags flags, BoxSide side) { return flags & edgeFlagForSide(side); }
+inline bool includesAdjacentEdges(BorderEdgeFlags flags)
+{
+    return (flags & (BorderEdge::TopBorderEdge | BorderEdge::RightBorderEdge)) == (BorderEdge::TopBorderEdge | BorderEdge::RightBorderEdge)
+        || (flags & (BorderEdge::RightBorderEdge | BorderEdge::BottomBorderEdge)) == (BorderEdge::RightBorderEdge | BorderEdge::BottomBorderEdge)
+        || (flags & (BorderEdge::BottomBorderEdge | BorderEdge::LeftBorderEdge)) == (BorderEdge::BottomBorderEdge | BorderEdge::LeftBorderEdge)
+        || (flags & (BorderEdge::LeftBorderEdge | BorderEdge::TopBorderEdge)) == (BorderEdge::LeftBorderEdge | BorderEdge::TopBorderEdge);
+}
+
+} // namespace WebCore