Changeset 269228 in webkit

Timestamp:

Oct 31, 2020, 12:06:24 PM (5 years ago)

Author:

Simon Fraser

Message:

Clean up BoxSide and BorderEdge code
​https://bugs.webkit.org/show_bug.cgi?id=218197

Reviewed by Sam Weinig.

Source/WebCore:

Change border-drawing functions in RenderBoxModelObject which took BorderEdge[] to
use RectEdges<BorderEdge>. In addition, make BoxSide an enum class, and remove the redundant
PhysicalBoxSide. Also make BorderEdgeFlags an OptionSet<>.

I renamed PhysicalBoxSide to BoxSide because "physical" is a loaded term (it could mean
either locally top/right/bottom/left, or refer to absolute "physical coordinates").
This allowed BoxSide to be used in RectEdges, therefore making RectEdges<BorderEdge>
the right way to represent the set of edges for a box.

An equivalent set of bit flags, BoxSideFlag, allows use in an OptionSet<>.

Use more enumeration of sides in the border painting code.

• page/IntersectionObserver.cpp:

(WebCore::IntersectionObserver::rootMargin const):

• platform/RectEdges.h:

(WebCore::RectEdges::at):
(WebCore::RectEdges::top):
(WebCore::RectEdges::right):
(WebCore::RectEdges::bottom):
(WebCore::RectEdges::left):
(WebCore::RectEdges::at const):
(WebCore::RectEdges::top const):
(WebCore::RectEdges::right const):
(WebCore::RectEdges::bottom const):
(WebCore::RectEdges::left const):
(WebCore::RectEdges::setAt):
(WebCore::RectEdges::setTop):
(WebCore::RectEdges::setRight):
(WebCore::RectEdges::setBottom):
(WebCore::RectEdges::setLeft):

• platform/text/WritingMode.h:

(WebCore::isHorizontalPhysicalSide):
(WebCore::mirrorPhysicalSide):
(WebCore::rotatePhysicalSide):
(WebCore::mapLogicalSideToPhysicalSide):

• rendering/BorderEdge.cpp:

(WebCore::borderEdges):
(WebCore::BorderEdge::getBorderEdgeInfo): Deleted.

• rendering/BorderEdge.h:

(WebCore::edgeFlagForSide):
(WebCore::includesEdge):
(WebCore::includesAdjacentEdges):

• rendering/RenderBoxModelObject.cpp:

(WebCore::borderWillArcInnerEdge):
(WebCore::borderStyleHasUnmatchedColorsAtCorner):
(WebCore::colorsMatchAtCorner):
(WebCore::colorNeedsAntiAliasAtCorner):
(WebCore::willBeOverdrawn):
(WebCore::joinRequiresMitre):
(WebCore::calculateAdjustedInnerBorder):
(WebCore::RenderBoxModelObject::paintOneBorderSide):
(WebCore::calculateSideRect):
(WebCore::RenderBoxModelObject::paintBorderSides):
(WebCore::RenderBoxModelObject::paintTranslucentBorderSides):
(WebCore::RenderBoxModelObject::paintBorder):
(WebCore::RenderBoxModelObject::drawBoxSideFromPath):
(WebCore::RenderBoxModelObject::clipBorderSidePolygon):
(WebCore::RenderBoxModelObject::borderObscuresBackgroundEdge const):
(WebCore::RenderBoxModelObject::borderObscuresBackground const):

• rendering/RenderBoxModelObject.h:
• rendering/RenderElement.cpp:

(WebCore::RenderElement::drawLineForBoxSide const):
(WebCore::RenderElement::paintOutline):

• rendering/RenderInline.cpp:

(WebCore::RenderInline::paintOutlineForLine):

• rendering/RenderMultiColumnSet.cpp:

(WebCore::RenderMultiColumnSet::paintColumnRules):

• rendering/RenderObject.cpp:

(WebCore::RenderObject::calculateBorderStyleColor):

• rendering/RenderObjectEnums.h:
• rendering/RenderTableCell.cpp:

(WebCore::RenderTableCell::paintCollapsedBorders):

• rendering/RenderTableSection.cpp:

(WebCore::RenderTableSection::offsetTopForRowGroupBorder):
(WebCore::RenderTableSection::paintRowGroupBorderIfRequired):
(WebCore::physicalBorderForDirection):

• rendering/RenderThemeIOS.mm:

(WebCore::RenderThemeIOS::paintMenuListButtonDecorations):

• rendering/style/NinePieceImage.h:

(WebCore::imagePieceHorizontalSide):
(WebCore::imagePieceVerticalSide):

Source/WebKit:

• UIProcess/ios/WKKeyboardScrollingAnimator.mm:

(boxSide):

Location:

trunk/Source

Files:

• WebCore/ChangeLog (modified) (1 diff)
• WebCore/page/IntersectionObserver.cpp (modified) (2 diffs)
• WebCore/platform/RectEdges.h (modified) (2 diffs)
• WebCore/platform/text/WritingMode.h (modified) (4 diffs)
• WebCore/rendering/BorderEdge.cpp (modified) (1 diff)
• WebCore/rendering/BorderEdge.h (modified) (3 diffs)
• WebCore/rendering/RenderBoxModelObject.cpp (modified) (35 diffs)
• WebCore/rendering/RenderBoxModelObject.h (modified) (4 diffs)
• WebCore/rendering/RenderElement.cpp (modified) (13 diffs)
• WebCore/rendering/RenderInline.cpp (modified) (8 diffs)
• WebCore/rendering/RenderMultiColumnSet.cpp (modified) (2 diffs)
• WebCore/rendering/RenderObject.cpp (modified) (1 diff)
• WebCore/rendering/RenderObjectEnums.h (modified) (1 diff)
• WebCore/rendering/RenderTableCell.cpp (modified) (1 diff)
• WebCore/rendering/RenderTableSection.cpp (modified) (3 diffs)
• WebCore/rendering/RenderThemeIOS.mm (modified) (1 diff)
• WebCore/rendering/style/NinePieceImage.h (modified) (1 diff)
• WebKit/ChangeLog (modified) (1 diff)
• WebKit/UIProcess/ios/WKKeyboardScrollingAnimator.mm (modified) (1 diff)

trunk/Source/WebCore/ChangeLog

@@ +1 @@
+2020-10-31  Simon Fraser  <simon.fraser@apple.com>
+
+        Clean up BoxSide and BorderEdge code
+        https://bugs.webkit.org/show_bug.cgi?id=218197
+
+        Reviewed by Sam Weinig.
+
+        Change border-drawing functions in RenderBoxModelObject which took BorderEdge[] to
+        use RectEdges<BorderEdge>. In addition, make BoxSide an enum class, and remove the redundant
+        PhysicalBoxSide. Also make BorderEdgeFlags an OptionSet<>.
+
+        I renamed PhysicalBoxSide to BoxSide because "physical" is a loaded term (it could mean
+        either locally top/right/bottom/left, or refer to absolute "physical coordinates").
+        This allowed BoxSide to be used in RectEdges, therefore making RectEdges<BorderEdge>
+        the right way to represent the set of edges for a box.
+        
+        An equivalent set of bit flags, BoxSideFlag, allows use in an OptionSet<>.
+        
+        Use more enumeration of sides in the border painting code.
+
+        * page/IntersectionObserver.cpp:
+        (WebCore::IntersectionObserver::rootMargin const):
+        * platform/RectEdges.h:
+        (WebCore::RectEdges::at):
+        (WebCore::RectEdges::top):
+        (WebCore::RectEdges::right):
+        (WebCore::RectEdges::bottom):
+        (WebCore::RectEdges::left):
+        (WebCore::RectEdges::at const):
+        (WebCore::RectEdges::top const):
+        (WebCore::RectEdges::right const):
+        (WebCore::RectEdges::bottom const):
+        (WebCore::RectEdges::left const):
+        (WebCore::RectEdges::setAt):
+        (WebCore::RectEdges::setTop):
+        (WebCore::RectEdges::setRight):
+        (WebCore::RectEdges::setBottom):
+        (WebCore::RectEdges::setLeft):
+        * platform/text/WritingMode.h:
+        (WebCore::isHorizontalPhysicalSide):
+        (WebCore::mirrorPhysicalSide):
+        (WebCore::rotatePhysicalSide):
+        (WebCore::mapLogicalSideToPhysicalSide):
+        * rendering/BorderEdge.cpp:
+        (WebCore::borderEdges):
+        (WebCore::BorderEdge::getBorderEdgeInfo): Deleted.
+        * rendering/BorderEdge.h:
+        (WebCore::edgeFlagForSide):
+        (WebCore::includesEdge):
+        (WebCore::includesAdjacentEdges):
+        * rendering/RenderBoxModelObject.cpp:
+        (WebCore::borderWillArcInnerEdge):
+        (WebCore::borderStyleHasUnmatchedColorsAtCorner):
+        (WebCore::colorsMatchAtCorner):
+        (WebCore::colorNeedsAntiAliasAtCorner):
+        (WebCore::willBeOverdrawn):
+        (WebCore::joinRequiresMitre):
+        (WebCore::calculateAdjustedInnerBorder):
+        (WebCore::RenderBoxModelObject::paintOneBorderSide):
+        (WebCore::calculateSideRect):
+        (WebCore::RenderBoxModelObject::paintBorderSides):
+        (WebCore::RenderBoxModelObject::paintTranslucentBorderSides):
+        (WebCore::RenderBoxModelObject::paintBorder):
+        (WebCore::RenderBoxModelObject::drawBoxSideFromPath):
+        (WebCore::RenderBoxModelObject::clipBorderSidePolygon):
+        (WebCore::RenderBoxModelObject::borderObscuresBackgroundEdge const):
+        (WebCore::RenderBoxModelObject::borderObscuresBackground const):
+        * rendering/RenderBoxModelObject.h:
+        * rendering/RenderElement.cpp:
+        (WebCore::RenderElement::drawLineForBoxSide const):
+        (WebCore::RenderElement::paintOutline):
+        * rendering/RenderInline.cpp:
+        (WebCore::RenderInline::paintOutlineForLine):
+        * rendering/RenderMultiColumnSet.cpp:
+        (WebCore::RenderMultiColumnSet::paintColumnRules):
+        * rendering/RenderObject.cpp:
+        (WebCore::RenderObject::calculateBorderStyleColor):
+        * rendering/RenderObjectEnums.h:
+        * rendering/RenderTableCell.cpp:
+        (WebCore::RenderTableCell::paintCollapsedBorders):
+        * rendering/RenderTableSection.cpp:
+        (WebCore::RenderTableSection::offsetTopForRowGroupBorder):
+        (WebCore::RenderTableSection::paintRowGroupBorderIfRequired):
+        (WebCore::physicalBorderForDirection):
+        * rendering/RenderThemeIOS.mm:
+        (WebCore::RenderThemeIOS::paintMenuListButtonDecorations):
+        * rendering/style/NinePieceImage.h:
+        (WebCore::imagePieceHorizontalSide):
+        (WebCore::imagePieceVerticalSide):
+
 2020-10-31  Chris Dumez  <cdumez@apple.com>
 

trunk/Source/WebCore/page/IntersectionObserver.cpp

@@ -151 +151 @@
 {
     StringBuilder stringBuilder;
-    PhysicalBoxSide sides[4] = { PhysicalBoxSide::Top, PhysicalBoxSide::Right, PhysicalBoxSide::Bottom, PhysicalBoxSide::Left };
-    for (auto side : sides) {
+    for (auto side : allBoxSides) {
         auto& length = m_rootMargin.at(side);
         stringBuilder.appendNumber(length.intValue());
@@ -159 +158 @@
         else
             stringBuilder.appendLiteral("px");
-        if (side != PhysicalBoxSide::Left)
+        if (side != BoxSide::Left)
             stringBuilder.append(' ');
     }

trunk/Source/WebCore/platform/RectEdges.h

@@ -28 +28 @@
 #include "WritingMode.h"
 #include <array>
+#include <wtf/OptionSet.h>
 
 namespace WebCore {
-    
+
+enum class BoxSideFlag : uint8_t {
+    Top     = 1 << static_cast<unsigned>(BoxSide::Top),
+    Right   = 1 << static_cast<unsigned>(BoxSide::Right),
+    Bottom  = 1 << static_cast<unsigned>(BoxSide::Bottom),
+    Left    = 1 << static_cast<unsigned>(BoxSide::Left)
+};
+
+using BoxSideSet = OptionSet<BoxSideFlag>;
+
 template<typename T> class RectEdges {
 public:
@@ -39 +49 @@
         : m_sides({ { std::forward<T>(top), std::forward<T>(right), std::forward<T>(bottom), std::forward<T>(left) } })
     { }
-    
-    T& at(PhysicalBoxSide side) { return m_sides[static_cast<size_t>(side)]; }
-    T& top() { return at(PhysicalBoxSide::Top); }
-    T& right() { return at(PhysicalBoxSide::Right); }
-    T& bottom() { return at(PhysicalBoxSide::Bottom); }
-    T& left() { return at(PhysicalBoxSide::Left); }
-    
-    const T& at(PhysicalBoxSide side) const { return m_sides[static_cast<size_t>(side)]; }
-    const T& top() const { return at(PhysicalBoxSide::Top); }
-    const T& right() const { return at(PhysicalBoxSide::Right); }
-    const T& bottom() const { return at(PhysicalBoxSide::Bottom); }
-    const T& left() const { return at(PhysicalBoxSide::Left); }
-    
-    void setAt(PhysicalBoxSide side, const T& v) { at(side) = v; }
-    void setTop(const T& top) { setAt(PhysicalBoxSide::Top, top); }
-    void setRight(const T& right) { setAt(PhysicalBoxSide::Right, right); }
-    void setBottom(const T& bottom) { setAt(PhysicalBoxSide::Bottom, bottom); }
-    void setLeft(const T& left) { setAt(PhysicalBoxSide::Left, left); }
-    
+
+    T& at(BoxSide side) { return m_sides[static_cast<size_t>(side)]; }
+    T& operator[](BoxSide side) { return m_sides[static_cast<size_t>(side)]; }
+    T& top() { return at(BoxSide::Top); }
+    T& right() { return at(BoxSide::Right); }
+    T& bottom() { return at(BoxSide::Bottom); }
+    T& left() { return at(BoxSide::Left); }
+
+    const T& at(BoxSide side) const { return m_sides[static_cast<size_t>(side)]; }
+    const T& operator[](BoxSide side) const { return m_sides[static_cast<size_t>(side)]; }
+    const T& top() const { return at(BoxSide::Top); }
+    const T& right() const { return at(BoxSide::Right); }
+    const T& bottom() const { return at(BoxSide::Bottom); }
+    const T& left() const { return at(BoxSide::Left); }
+
+    void setAt(BoxSide side, const T& v) { at(side) = v; }
+    void setTop(const T& top) { setAt(BoxSide::Top, top); }
+    void setRight(const T& right) { setAt(BoxSide::Right, right); }
+    void setBottom(const T& bottom) { setAt(BoxSide::Bottom, bottom); }
+    void setLeft(const T& left) { setAt(BoxSide::Left, left); }
+
     T& before(WritingMode writingMode) { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::Before)); }
     T& after(WritingMode writingMode) { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::After)); }
     T& start(WritingMode writingMode, TextDirection direction = TextDirection::LTR) { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::Start)); }
     T& end(WritingMode writingMode, TextDirection direction = TextDirection::LTR) { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::End)); }
-    
+
     const T& before(WritingMode writingMode) const { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::Before)); }
     const T& after(WritingMode writingMode) const { return at(mapLogicalSideToPhysicalSide(writingMode, LogicalBoxSide::After)); }
     const T& start(WritingMode writingMode, TextDirection direction = TextDirection::LTR) const { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::Start)); }
     const T& end(WritingMode writingMode, TextDirection direction = TextDirection::LTR) const { return at(mapLogicalSideToPhysicalSide(makeTextFlow(writingMode, direction), LogicalBoxSide::End)); }
-    
+
     void setBefore(const T& before, WritingMode writingMode) { this->before(writingMode) = before; }
     void setAfter(const T& after, WritingMode writingMode) { this->after(writingMode) = after; }
     void setStart(const T& start, WritingMode writingMode, TextDirection direction = TextDirection::LTR) { this->start(writingMode, direction) = start; }
     void setEnd(const T& end, WritingMode writingMode, TextDirection direction = TextDirection::LTR) { this->end(writingMode, direction) = end; }
-    
+
     bool operator==(const RectEdges& other) const { return m_sides == other.m_sides; }
     bool operator!=(const RectEdges& other) const { return m_sides != other.m_sides; }
 
 private:
-    std::array<T, 4> m_sides {{0, 0, 0, 0}};
+    std::array<T, 4> m_sides { };
 };
 

trunk/Source/WebCore/platform/text/WritingMode.h

@@ -32 +32 @@
 #pragma once
 
+#include <array>
 #include <wtf/EnumTraits.h>
 
@@ -122 +123 @@
 };
 
-enum class PhysicalBoxSide : uint8_t {
+enum class BoxSide : uint8_t {
     Top,
     Right,
@@ -129 +130 @@
 };
 
-inline bool isHorizontalPhysicalSide(PhysicalBoxSide physicalSide)
+constexpr std::array<BoxSide, 4> allBoxSides = { BoxSide::Top, BoxSide::Right, BoxSide::Bottom, BoxSide::Left };
+
+inline bool isHorizontalPhysicalSide(BoxSide physicalSide)
 {
-    return physicalSide == PhysicalBoxSide::Left || physicalSide == PhysicalBoxSide::Right;
+    return physicalSide == BoxSide::Left || physicalSide == BoxSide::Right;
 }
 
-inline PhysicalBoxSide mirrorPhysicalSide(PhysicalBoxSide physicalSide)
+inline BoxSide mirrorPhysicalSide(BoxSide physicalSide)
 {
     // top <-> bottom and left <-> right conversion
-    return static_cast<PhysicalBoxSide>((static_cast<int>(physicalSide) + 2) % 4);
+    return static_cast<BoxSide>((static_cast<int>(physicalSide) + 2) % 4);
 }
 
-inline PhysicalBoxSide rotatePhysicalSide(PhysicalBoxSide physicalSide)
+inline BoxSide rotatePhysicalSide(BoxSide physicalSide)
 {
     // top <-> left and right <-> bottom conversion
     bool horizontalSide = isHorizontalPhysicalSide(physicalSide);
-    return static_cast<PhysicalBoxSide>((static_cast<int>(physicalSide) + (horizontalSide ? 1 : 3)) % 4);
+    return static_cast<BoxSide>((static_cast<int>(physicalSide) + (horizontalSide ? 1 : 3)) % 4);
 }
 
-inline PhysicalBoxSide mapLogicalSideToPhysicalSide(TextFlow textflow, LogicalBoxSide logicalSide)
+inline BoxSide mapLogicalSideToPhysicalSide(TextFlow textflow, LogicalBoxSide logicalSide)
 {
-    PhysicalBoxSide physicalSide = static_cast<PhysicalBoxSide>(logicalSide);
+    BoxSide physicalSide = static_cast<BoxSide>(logicalSide);
     bool horizontalSide = isHorizontalPhysicalSide(physicalSide);
 
@@ -161 +164 @@
 }
 
-inline PhysicalBoxSide mapLogicalSideToPhysicalSide(WritingMode writingMode, LogicalBoxSide logicalSide)
+inline BoxSide mapLogicalSideToPhysicalSide(WritingMode writingMode, LogicalBoxSide logicalSide)
 {
     // Set the direction such that side is mirrored if isFlippedWritingMode() is true

trunk/Source/WebCore/rendering/BorderEdge.cpp

@@ -47 +47 @@
 }
 
-void BorderEdge::getBorderEdgeInfo(BorderEdge edges[], const RenderStyle& style, float deviceScaleFactor, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
+BorderEdges borderEdges(const RenderStyle& style, float deviceScaleFactor, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
 {
     bool horizontal = style.isHorizontalWritingMode();
 
-    edges[BSTop] = BorderEdge(style.borderTopWidth(), style.visitedDependentColorWithColorFilter(CSSPropertyBorderTopColor), style.borderTopStyle(), style.borderTopIsTransparent(),
-        horizontal || includeLogicalLeftEdge, deviceScaleFactor);
-    edges[BSRight] = BorderEdge(style.borderRightWidth(), style.visitedDependentColorWithColorFilter(CSSPropertyBorderRightColor), style.borderRightStyle(), style.borderRightIsTransparent(),
-        !horizontal || includeLogicalRightEdge, deviceScaleFactor);
-    edges[BSBottom] = BorderEdge(style.borderBottomWidth(), style.visitedDependentColorWithColorFilter(CSSPropertyBorderBottomColor), style.borderBottomStyle(), style.borderBottomIsTransparent(),
-        horizontal || includeLogicalRightEdge, deviceScaleFactor);
-    edges[BSLeft] = BorderEdge(style.borderLeftWidth(), style.visitedDependentColorWithColorFilter(CSSPropertyBorderLeftColor), style.borderLeftStyle(), style.borderLeftIsTransparent(),
-        !horizontal || includeLogicalLeftEdge, deviceScaleFactor);
-    }
+    auto constructBorderEdge = [&](float width, CSSPropertyID borderColorProperty, BorderStyle borderStyle, bool isTransparent, bool isPresent) {
+        return BorderEdge(width, style.visitedDependentColorWithColorFilter(borderColorProperty), borderStyle, isTransparent, isPresent, deviceScaleFactor);
+    };
+
+    return {
+        constructBorderEdge(style.borderTopWidth(), CSSPropertyBorderTopColor, style.borderTopStyle(), style.borderTopIsTransparent(), horizontal || includeLogicalLeftEdge),
+        constructBorderEdge(style.borderRightWidth(), CSSPropertyBorderRightColor, style.borderRightStyle(), style.borderRightIsTransparent(), !horizontal || includeLogicalRightEdge),
+        constructBorderEdge(style.borderBottomWidth(), CSSPropertyBorderBottomColor, style.borderBottomStyle(), style.borderBottomIsTransparent(), horizontal || includeLogicalRightEdge),
+        constructBorderEdge(style.borderLeftWidth(), CSSPropertyBorderLeftColor, style.borderLeftStyle(), style.borderLeftIsTransparent(), !horizontal || includeLogicalLeftEdge)
+    };
+}
 
 bool BorderEdge::obscuresBackgroundEdge(float scale) const

trunk/Source/WebCore/rendering/BorderEdge.h

@@ -28 +28 @@
 #include "Color.h"
 #include "LayoutUnit.h"
+#include "RectEdges.h"
 #include "RenderObjectEnums.h"
 #include "RenderStyleConstants.h"
+#include <wtf/OptionSet.h>
 
 namespace WebCore {
-
-typedef unsigned BorderEdgeFlags;
 
 class RenderStyle;
@@ -39 +39 @@
 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, BorderStyle edgeStyle, bool edgeIsTransparent, bool edgeIsPresent, float devicePixelRatio);
-
-    static void getBorderEdgeInfo(BorderEdge edges[], const RenderStyle&, float deviceScaleFactor, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
 
     BorderStyle style() const { return m_style; }
@@ -77 +67 @@
 };
 
+using BorderEdges = RectEdges<BorderEdge>;
+BorderEdges borderEdges(const RenderStyle&, float deviceScaleFactor, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
+
 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)
+inline BoxSideFlag edgeFlagForSide(BoxSide side) { return static_cast<BoxSideFlag>(1 << static_cast<unsigned>(side)); }
+inline bool includesEdge(OptionSet<BoxSideFlag> flags, BoxSide side) { return flags.contains(edgeFlagForSide(side)); }
+
+inline bool includesAdjacentEdges(OptionSet<BoxSideFlag> 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);
+    return flags.containsAll({ BoxSideFlag::Top, BoxSideFlag::Right })
+        || flags.containsAll({ BoxSideFlag::Right, BoxSideFlag::Bottom })
+        || flags.containsAll({ BoxSideFlag::Bottom, BoxSideFlag::Left })
+        || flags.containsAll({ BoxSideFlag::Left, BoxSideFlag::Top });
 }
 

trunk/Source/WebCore/rendering/RenderBoxModelObject.cpp

@@ -1456 +1456 @@
 }
 
-static bool borderWillArcInnerEdge(const LayoutSize& firstRadius, const FloatSize& secondRadius)
+static bool borderWillArcInnerEdge(const LayoutSize& firstRadius, const LayoutSize& secondRadius)
 {
     return !firstRadius.isZero() || !secondRadius.isZero();
@@ -1487 +1487 @@
     // These styles match at the top/left and bottom/right.
     if (style == BorderStyle::Inset || style == BorderStyle::Groove || style == BorderStyle::Ridge || style == BorderStyle::Outset) {
-        const BorderEdgeFlags topRightFlags = edgeFlagForSide(BSTop) | edgeFlagForSide(BSRight);
-        const BorderEdgeFlags bottomLeftFlags = edgeFlagForSide(BSBottom) | edgeFlagForSide(BSLeft);
-
-        BorderEdgeFlags flags = edgeFlagForSide(side) | edgeFlagForSide(adjacentSide);
-        return flags == topRightFlags || flags == bottomLeftFlags;
+        BoxSideSet topRightSides = { BoxSideFlag::Top, BoxSideFlag::Right };
+        BoxSideSet bottomLeftSides = { BoxSideFlag::Bottom, BoxSideFlag::Left };
+
+        BoxSideSet usedSides { edgeFlagForSide(side), edgeFlagForSide(adjacentSide) };
+        return usedSides == topRightSides || usedSides == bottomLeftSides;
     }
     return false;
 }
 
-static inline bool colorsMatchAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[])
-{
-    if (edges[side].shouldRender() != edges[adjacentSide].shouldRender())
-        return false;
-
-    if (!edgesShareColor(edges[side], edges[adjacentSide]))
-        return false;
-
-    return !borderStyleHasUnmatchedColorsAtCorner(edges[side].style(), side, adjacentSide);
-}
-
-
-static inline bool colorNeedsAntiAliasAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[])
-{
-    if (edges[side].color().isOpaque())
-        return false;
-
-    if (edges[side].shouldRender() != edges[adjacentSide].shouldRender())
-        return false;
-
-    if (!edgesShareColor(edges[side], edges[adjacentSide]))
+static inline bool colorsMatchAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdges& edges)
+{
+    auto& edge = edges.at(side);
+    auto& adjacentEdge = edges.at(adjacentSide);
+
+    if (edge.shouldRender() != adjacentEdge.shouldRender())
+        return false;
+
+    if (!edgesShareColor(edge, adjacentEdge))
+        return false;
+
+    return !borderStyleHasUnmatchedColorsAtCorner(edge.style(), side, adjacentSide);
+}
+
+
+static inline bool colorNeedsAntiAliasAtCorner(BoxSide side, BoxSide adjacentSide, const BorderEdges& edges)
+{
+    auto& edge = edges.at(side);
+    auto& adjacentEdge = edges.at(adjacentSide);
+
+    if (edge.color().isOpaque())
+        return false;
+
+    if (edge.shouldRender() != adjacentEdge.shouldRender())
+        return false;
+
+    if (!edgesShareColor(edge, adjacentEdge))
         return true;
 
-    return borderStyleHasUnmatchedColorsAtCorner(edges[side].style(), side, adjacentSide);
+    return borderStyleHasUnmatchedColorsAtCorner(edge.style(), side, adjacentSide);
 }
 
 // This assumes that we draw in order: top, bottom, left, right.
-static inline bool willBeOverdrawn(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[])
+static inline bool willBeOverdrawn(BoxSide side, BoxSide adjacentSide, const BorderEdges& edges)
 {
     switch (side) {
-    case BSTop:
-    case BSBottom:
-        if (edges[adjacentSide].presentButInvisible())
+    case BoxSide::Top:
+    case BoxSide::Bottom: {
+        auto& edge = edges.at(side);
+        auto& adjacentEdge = edges.at(adjacentSide);
+
+        if (adjacentEdge.presentButInvisible())
             return false;
 
-        if (!edgesShareColor(edges[side], edges[adjacentSide]) && !edges[adjacentSide].color().isOpaque())
+        if (!edgesShareColor(edge, adjacentEdge) && !adjacentEdge.color().isOpaque())
             return false;
         
-        if (!borderStyleFillsBorderArea(edges[adjacentSide].style()))
+        if (!borderStyleFillsBorderArea(adjacentEdge.style()))
             return false;
 
         return true;
-
-    case BSLeft:
-    case BSRight:
+    }
+    case BoxSide::Left:
+    case BoxSide::Right:
         // These draw last, so are never overdrawn.
         return false;
@@ -1561 +1570 @@
 }
 
-static bool joinRequiresMitre(BoxSide side, BoxSide adjacentSide, const BorderEdge edges[], bool allowOverdraw)
-{
-    if ((edges[side].isTransparent() && edges[adjacentSide].isTransparent()) || !edges[adjacentSide].isPresent())
+static bool joinRequiresMitre(BoxSide side, BoxSide adjacentSide, const BorderEdges& edges, bool allowOverdraw)
+{
+    auto& edge = edges.at(side);
+    auto& adjacentEdge = edges.at(adjacentSide);
+
+    if ((edge.isTransparent() && adjacentEdge.isTransparent()) || !adjacentEdge.isPresent())
         return false;
 
@@ -1569 +1581 @@
         return false;
 
-    if (!edgesShareColor(edges[side], edges[adjacentSide]))
+    if (!edgesShareColor(edge, adjacentEdge))
         return true;
 
-    if (borderStylesRequireMitre(side, adjacentSide, edges[side].style(), edges[adjacentSide].style()))
+    if (borderStylesRequireMitre(side, adjacentSide, edge.style(), adjacentEdge.style()))
         return true;
     
@@ -1590 +1602 @@
 
     switch (side) {
-    case BSTop:
+    case BoxSide::Top:
         overshoot = newRadii.topLeft().width() + newRadii.topRight().width() - newRect.width();
         if (overshoot > 0) {
@@ -1598 +1610 @@
                 newRect.move(-overshoot, 0);
         }
-        newRadii.setBottomLeft(IntSize(0, 0));
-        newRadii.setBottomRight(IntSize(0, 0));
+        newRadii.setBottomLeft({ });
+        newRadii.setBottomRight({ });
         maxRadii = std::max(newRadii.topLeft().height(), newRadii.topRight().height());
         if (maxRadii > newRect.height())
@@ -1605 +1617 @@
         break;
 
-    case BSBottom:
+    case BoxSide::Bottom:
         overshoot = newRadii.bottomLeft().width() + newRadii.bottomRight().width() - newRect.width();
         if (overshoot > 0) {
@@ -1613 +1625 @@
                 newRect.move(-overshoot, 0);
         }
-        newRadii.setTopLeft(IntSize(0, 0));
-        newRadii.setTopRight(IntSize(0, 0));
+        newRadii.setTopLeft({ });
+        newRadii.setTopRight({ });
         maxRadii = std::max(newRadii.bottomLeft().height(), newRadii.bottomRight().height());
         if (maxRadii > newRect.height()) {
@@ -1622 +1634 @@
         break;
 
-    case BSLeft:
+    case BoxSide::Left:
         overshoot = newRadii.topLeft().height() + newRadii.bottomLeft().height() - newRect.height();
         if (overshoot > 0) {
@@ -1630 +1642 @@
                 newRect.move(0, -overshoot);
         }
-        newRadii.setTopRight(IntSize(0, 0));
-        newRadii.setBottomRight(IntSize(0, 0));
+        newRadii.setTopRight({ });
+        newRadii.setBottomRight({ });
         maxRadii = std::max(newRadii.topLeft().width(), newRadii.bottomLeft().width());
         if (maxRadii > newRect.width())
@@ -1637 +1649 @@
         break;
 
-    case BSRight:
+    case BoxSide::Right:
         overshoot = newRadii.topRight().height() + newRadii.bottomRight().height() - newRect.height();
         if (overshoot > 0) {
@@ -1645 +1657 @@
                 newRect.move(0, -overshoot);
         }
-        newRadii.setTopLeft(IntSize(0, 0));
-        newRadii.setBottomLeft(IntSize(0, 0));
+        newRadii.setTopLeft({ });
+        newRadii.setBottomLeft({ });
         maxRadii = std::max(newRadii.topRight().width(), newRadii.bottomRight().width());
         if (maxRadii > newRect.width()) {
@@ -1659 +1671 @@
 
 void RenderBoxModelObject::paintOneBorderSide(GraphicsContext& graphicsContext, const RenderStyle& style, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-    const LayoutRect& sideRect, BoxSide side, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdge edges[], const Path* path,
+    const LayoutRect& sideRect, BoxSide side, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdges& edges, const Path* path,
     BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor)
 {
-    const BorderEdge& edgeToRender = edges[side];
+    auto& edgeToRender = edges.at(side);
     ASSERT(edgeToRender.widthForPainting());
-    const BorderEdge& adjacentEdge1 = edges[adjacentSide1];
-    const BorderEdge& adjacentEdge2 = edges[adjacentSide2];
+    auto& adjacentEdge1 = edges.at(adjacentSide1);
+    auto& adjacentEdge2 = edges.at(adjacentSide2);
 
     bool mitreAdjacentSide1 = joinRequiresMitre(side, adjacentSide1, edges, !antialias);
@@ -1705 +1717 @@
 }
 
-static LayoutRect calculateSideRect(const RoundedRect& outerBorder, const BorderEdge edges[], int side)
+static LayoutRect calculateSideRect(const RoundedRect& outerBorder, const BorderEdges& edges, BoxSide side)
 {
     LayoutRect sideRect = outerBorder.rect();
-    float width = edges[side].widthForPainting();
-
-    if (side == BSTop)
+    float width = edges.at(side).widthForPainting();
+
+    switch (side) {
+    case BoxSide::Top:
         sideRect.setHeight(width);
-    else if (side == BSBottom)
+        break;
+    case BoxSide::Right:
+        sideRect.shiftXEdgeTo(sideRect.maxX() - width);
+        break;
+    case BoxSide::Bottom:
         sideRect.shiftYEdgeTo(sideRect.maxY() - width);
-    else if (side == BSLeft)
+        break;
+    case BoxSide::Left:
         sideRect.setWidth(width);
-    else
-        sideRect.shiftXEdgeTo(sideRect.maxX() - width);
+        break;
+    }
 
     return sideRect;
@@ -1723 +1741 @@
 
 void RenderBoxModelObject::paintBorderSides(GraphicsContext& graphicsContext, const RenderStyle& style, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-    const IntPoint& innerBorderAdjustment, const BorderEdge edges[], BorderEdgeFlags edgeSet, BackgroundBleedAvoidance bleedAvoidance,
+    const IntPoint& innerBorderAdjustment, const BorderEdges& edges, BoxSideSet edgeSet, BackgroundBleedAvoidance bleedAvoidance,
     bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor)
 {
@@ -1737 +1755 @@
     // only depends on sideRect when painting solid borders.
 
-    if (edges[BSTop].shouldRender() && includesEdge(edgeSet, BSTop)) {
+    auto paintOneSide = [&](BoxSide side, BoxSide adjacentSide1, BoxSide adjacentSide2) {
+        auto& edge = edges.at(side);
+        if (!edge.shouldRender() || !edgeSet.contains(edgeFlagForSide(side)))
+            return;
+
         LayoutRect sideRect = outerBorder.rect();
-        sideRect.setHeight(edges[BSTop].widthForPainting() + innerBorderAdjustment.y());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSTop].style()) || borderWillArcInnerEdge(innerBorder.radii().topLeft(), innerBorder.radii().topRight()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSTop, BSLeft, BSRight, edges, usePath ? &roundedPath : nullptr, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-
-    if (edges[BSBottom].shouldRender() && includesEdge(edgeSet, BSBottom)) {
-        LayoutRect sideRect = outerBorder.rect();
-        sideRect.shiftYEdgeTo(sideRect.maxY() - edges[BSBottom].widthForPainting() - innerBorderAdjustment.y());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSBottom].style()) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().bottomRight()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSBottom, BSLeft, BSRight, edges, usePath ? &roundedPath : nullptr, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-
-    if (edges[BSLeft].shouldRender() && includesEdge(edgeSet, BSLeft)) {
-        LayoutRect sideRect = outerBorder.rect();
-        sideRect.setWidth(edges[BSLeft].widthForPainting() + innerBorderAdjustment.x());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSLeft].style()) || borderWillArcInnerEdge(innerBorder.radii().bottomLeft(), innerBorder.radii().topLeft()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSLeft, BSTop, BSBottom, edges, usePath ? &roundedPath : nullptr, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
-
-    if (edges[BSRight].shouldRender() && includesEdge(edgeSet, BSRight)) {
-        LayoutRect sideRect = outerBorder.rect();
-        sideRect.shiftXEdgeTo(sideRect.maxX() - edges[BSRight].widthForPainting() - innerBorderAdjustment.x());
-
-        bool usePath = renderRadii && (borderStyleHasInnerDetail(edges[BSRight].style()) || borderWillArcInnerEdge(innerBorder.radii().bottomRight(), innerBorder.radii().topRight()));
-        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, BSRight, BSTop, BSBottom, edges, usePath ? &roundedPath : nullptr, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
-    }
+        LayoutSize firstRadius;
+        LayoutSize secondRadius;
+
+        switch (side) {
+        case BoxSide::Top:
+            sideRect.setHeight(edge.widthForPainting() + innerBorderAdjustment.y());
+            firstRadius = innerBorder.radii().topLeft();
+            secondRadius = innerBorder.radii().topRight();
+            break;
+        case BoxSide::Right:
+            sideRect.shiftXEdgeTo(sideRect.maxX() - edge.widthForPainting() - innerBorderAdjustment.x());
+            firstRadius = innerBorder.radii().bottomRight();
+            secondRadius = innerBorder.radii().topRight();
+            break;
+        case BoxSide::Bottom:
+            sideRect.shiftYEdgeTo(sideRect.maxY() - edge.widthForPainting() - innerBorderAdjustment.y());
+            firstRadius = innerBorder.radii().bottomLeft();
+            secondRadius = innerBorder.radii().bottomRight();
+            break;
+        case BoxSide::Left:
+            sideRect.setWidth(edge.widthForPainting() + innerBorderAdjustment.x());
+            firstRadius = innerBorder.radii().bottomLeft();
+            secondRadius = innerBorder.radii().topLeft();
+            break;
+        }
+
+        bool usePath = renderRadii && (borderStyleHasInnerDetail(edge.style()) || borderWillArcInnerEdge(firstRadius, secondRadius));
+        paintOneBorderSide(graphicsContext, style, outerBorder, innerBorder, sideRect, side, adjacentSide1, adjacentSide2, edges, usePath ? &roundedPath : nullptr, bleedAvoidance, includeLogicalLeftEdge, includeLogicalRightEdge, antialias, overrideColor);
+    };
+
+    paintOneSide(BoxSide::Top, BoxSide::Left, BoxSide::Right);
+    paintOneSide(BoxSide::Bottom, BoxSide::Left, BoxSide::Right);
+    paintOneSide(BoxSide::Left, BoxSide::Top, BoxSide::Bottom);
+    paintOneSide(BoxSide::Right, BoxSide::Top, BoxSide::Bottom);
 }
 
 void RenderBoxModelObject::paintTranslucentBorderSides(GraphicsContext& graphicsContext, const RenderStyle& style, const RoundedRect& outerBorder, const RoundedRect& innerBorder, const IntPoint& innerBorderAdjustment,
-    const BorderEdge edges[], BorderEdgeFlags edgesToDraw, BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias)
+    const BorderEdges& edges, BoxSideSet edgesToDraw, BackgroundBleedAvoidance bleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias)
 {
     // willBeOverdrawn assumes that we draw in order: top, bottom, left, right.
     // This is different from BoxSide enum order.
-    static const BoxSide paintOrder[] = { BSTop, BSBottom, BSLeft, BSRight };
+    static constexpr std::array<BoxSide, 4> paintOrderSides = { BoxSide::Top, BoxSide::Bottom, BoxSide::Left, BoxSide::Right };
 
     while (edgesToDraw) {
@@ -1781 +1808 @@
         Color commonColor;
         
-        BorderEdgeFlags commonColorEdgeSet = 0;
-        for (size_t i = 0; i < sizeof(paintOrder) / sizeof(paintOrder[0]); ++i) {
-            BoxSide currSide = paintOrder[i];
-            if (!includesEdge(edgesToDraw, currSide))
+        BoxSideSet commonColorEdgeSet;
+        for (auto side : paintOrderSides) {
+            if (!edgesToDraw.contains(edgeFlagForSide(side)))
                 continue;
 
+            auto& edge = edges.at(side);
             bool includeEdge;
-            if (!commonColorEdgeSet) {
-                commonColor = edges[currSide].color();
+            if (commonColorEdgeSet.isEmpty()) {
+                commonColor = edge.color();
                 includeEdge = true;
             } else
-                includeEdge = edges[currSide].color() == commonColor;
+                includeEdge = edge.color() == commonColor;
 
             if (includeEdge)
-                commonColorEdgeSet |= edgeFlagForSide(currSide);
+                commonColorEdgeSet.add(edgeFlagForSide(side));
         }
 
@@ -1809 +1836 @@
             graphicsContext.endTransparencyLayer();
         
-        edgesToDraw &= ~commonColorEdgeSet;
+        edgesToDraw.remove(commonColorEdgeSet);
     }
 }
@@ -1834 +1861 @@
         return;
 
-    BorderEdge edges[4];
-    BorderEdge::getBorderEdgeInfo(edges, style, document().deviceScaleFactor(), includeLogicalLeftEdge, includeLogicalRightEdge);
+    auto edges = borderEdges(style, document().deviceScaleFactor(), includeLogicalLeftEdge, includeLogicalRightEdge);
     RoundedRect outerBorder = style.getRoundedBorderFor(rect, includeLogicalLeftEdge, includeLogicalRightEdge);
     RoundedRect innerBorder = style.getRoundedInnerBorderFor(borderInnerRectAdjustedForBleedAvoidance(graphicsContext, rect, bleedAvoidance), includeLogicalLeftEdge, includeLogicalRightEdge);
@@ -1848 +1874 @@
     int numEdgesVisible = 4;
     bool allEdgesShareColor = true;
-    int firstVisibleEdge = -1;
-    BorderEdgeFlags edgesToDraw = 0;
-
-    for (int i = BSTop; i <= BSLeft; ++i) {
-        const BorderEdge& currEdge = edges[i];
-
-        if (edges[i].shouldRender())
-            edgesToDraw |= edgeFlagForSide(static_cast<BoxSide>(i));
+    Optional<BoxSide> firstVisibleSide;
+    BoxSideSet edgesToDraw;
+
+    for (auto side : allBoxSides) {
+        auto& currEdge = edges.at(side);
+
+        if (currEdge.shouldRender())
+            edgesToDraw.add(edgeFlagForSide(side));
 
         if (currEdge.presentButInvisible()) {
@@ -1868 +1894 @@
         }
 
-        if (firstVisibleEdge == -1)
-            firstVisibleEdge = i;
-        else if (currEdge.color() != edges[firstVisibleEdge].color())
+        if (!firstVisibleSide)
+            firstVisibleSide = side;
+        else if (currEdge.color() != edges.at(*firstVisibleSide).color())
             allEdgesShareColor = false;
 
@@ -1905 +1931 @@
                 LayoutRect innerThirdRect = outerBorder.rect();
                 LayoutRect outerThirdRect = outerBorder.rect();
-                for (int side = BSTop; side <= BSLeft; ++side) {
+                for (auto side : allBoxSides) {
                     LayoutUnit outerWidth;
                     LayoutUnit innerWidth;
-                    edges[side].getDoubleBorderStripeWidths(outerWidth, innerWidth);
-
-                    if (side == BSTop) {
+                    edges.at(side).getDoubleBorderStripeWidths(outerWidth, innerWidth);
+                    switch (side) {
+                    case BoxSide::Top:
                         innerThirdRect.shiftYEdgeTo(innerThirdRect.y() + innerWidth);
                         outerThirdRect.shiftYEdgeTo(outerThirdRect.y() + outerWidth);
-                    } else if (side == BSBottom) {
+                        break;
+                    case BoxSide::Right:
+                        innerThirdRect.setWidth(innerThirdRect.width() - innerWidth);
+                        outerThirdRect.setWidth(outerThirdRect.width() - outerWidth);
+                        break;
+                    case BoxSide::Bottom:
                         innerThirdRect.setHeight(innerThirdRect.height() - innerWidth);
                         outerThirdRect.setHeight(outerThirdRect.height() - outerWidth);
-                    } else if (side == BSLeft) {
+                        break;
+                    case BoxSide::Left:
                         innerThirdRect.shiftXEdgeTo(innerThirdRect.x() + innerWidth);
                         outerThirdRect.shiftXEdgeTo(outerThirdRect.x() + outerWidth);
-                    } else {
-                        innerThirdRect.setWidth(innerThirdRect.width() - innerWidth);
-                        outerThirdRect.setWidth(outerThirdRect.width() - outerWidth);
+                        break;
                     }
                 }
@@ -1948 +1978 @@
             
             graphicsContext.setFillRule(WindRule::EvenOdd);
-            graphicsContext.setFillColor(edges[firstVisibleEdge].color());
+            graphicsContext.setFillColor(edges.at(*firstVisibleSide).color());
             graphicsContext.fillPath(path);
             return;
@@ -1956 +1986 @@
             Path path;
 
-            for (int i = BSTop; i <= BSLeft; ++i) {
-                const BorderEdge& currEdge = edges[i];
-                if (currEdge.shouldRender()) {
-                    LayoutRect sideRect = calculateSideRect(outerBorder, edges, i);
-                    path.addRect(sideRect);
+            for (auto side : allBoxSides) {
+                if (edges.at(side).shouldRender()) {
+                    auto sideRect = calculateSideRect(outerBorder, edges, side);
+                    path.addRect(sideRect); // FIXME: Need pixel snapping here.
                 }
             }
 
             graphicsContext.setFillRule(WindRule::NonZero);
-            graphicsContext.setFillColor(edges[firstVisibleEdge].color());
+            graphicsContext.setFillColor(edges.at(*firstVisibleSide).color());
             graphicsContext.fillPath(path);
             return;
@@ -1993 +2022 @@
 }
 
-void RenderBoxModelObject::drawBoxSideFromPath(GraphicsContext& graphicsContext, const LayoutRect& borderRect, const Path& borderPath, const BorderEdge edges[],
+void RenderBoxModelObject::drawBoxSideFromPath(GraphicsContext& graphicsContext, const LayoutRect& borderRect, const Path& borderPath, const BorderEdges& edges,
     float thickness, float drawThickness, BoxSide side, const RenderStyle& style, Color color, BorderStyle borderStyle, BackgroundBleedAvoidance bleedAvoidance,
     bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
@@ -2052 +2081 @@
         LayoutUnit outerBorderTopWidth;
         LayoutUnit innerBorderTopWidth;
-        edges[BSTop].getDoubleBorderStripeWidths(outerBorderTopWidth, innerBorderTopWidth);
+        edges.top().getDoubleBorderStripeWidths(outerBorderTopWidth, innerBorderTopWidth);
 
         LayoutUnit outerBorderRightWidth;
         LayoutUnit innerBorderRightWidth;
-        edges[BSRight].getDoubleBorderStripeWidths(outerBorderRightWidth, innerBorderRightWidth);
+        edges.right().getDoubleBorderStripeWidths(outerBorderRightWidth, innerBorderRightWidth);
 
         LayoutUnit outerBorderBottomWidth;
         LayoutUnit innerBorderBottomWidth;
-        edges[BSBottom].getDoubleBorderStripeWidths(outerBorderBottomWidth, innerBorderBottomWidth);
+        edges.bottom().getDoubleBorderStripeWidths(outerBorderBottomWidth, innerBorderBottomWidth);
 
         LayoutUnit outerBorderLeftWidth;
         LayoutUnit innerBorderLeftWidth;
-        edges[BSLeft].getDoubleBorderStripeWidths(outerBorderLeftWidth, innerBorderLeftWidth);
+        edges.left().getDoubleBorderStripeWidths(outerBorderLeftWidth, innerBorderLeftWidth);
 
         // Draw inner border line
@@ -2115 +2144 @@
         // Paint inner only
         GraphicsContextStateSaver stateSaver(graphicsContext);
-        LayoutUnit topWidth { edges[BSTop].widthForPainting() / 2 };
-        LayoutUnit bottomWidth { edges[BSBottom].widthForPainting() / 2 };
-        LayoutUnit leftWidth { edges[BSLeft].widthForPainting() / 2 };
-        LayoutUnit rightWidth { edges[BSRight].widthForPainting() / 2 };
+        LayoutUnit topWidth { edges.top().widthForPainting() / 2 };
+        LayoutUnit bottomWidth { edges.bottom().widthForPainting() / 2 };
+        LayoutUnit leftWidth { edges.left().widthForPainting() / 2 };
+        LayoutUnit rightWidth { edges.right().widthForPainting() / 2 };
 
         RoundedRect clipRect = style.getRoundedInnerBorderFor(borderRect,
@@ -2165 +2194 @@
     quad.reserveInitialCapacity(4);
     switch (side) {
-    case BSTop:
+    case BoxSide::Top:
         quad.uncheckedAppend(outerRect.minXMinYCorner());
         quad.uncheckedAppend(innerRect.minXMinYCorner());
@@ -2178 +2207 @@
         break;
 
-    case BSLeft:
+    case BoxSide::Left:
         quad.uncheckedAppend(outerRect.minXMinYCorner());
         quad.uncheckedAppend(innerRect.minXMinYCorner());
@@ -2191 +2220 @@
         break;
 
-    case BSBottom:
+    case BoxSide::Bottom:
         quad.uncheckedAppend(outerRect.minXMaxYCorner());
         quad.uncheckedAppend(innerRect.minXMaxYCorner());
@@ -2204 +2233 @@
         break;
 
-    case BSRight:
+    case BoxSide::Right:
         quad.uncheckedAppend(outerRect.maxXMinYCorner());
         quad.uncheckedAppend(innerRect.maxXMinYCorner());
@@ -2233 +2262 @@
         quad[1],
         quad[2],
-        side == BSTop || side == BSBottom ? FloatPoint(quad[3].x(), quad[2].y()) : FloatPoint(quad[2].x(), quad[3].y()),
+        side == BoxSide::Top || side == BoxSide::Bottom ? FloatPoint(quad[3].x(), quad[2].y()) : FloatPoint(quad[2].x(), quad[3].y()),
         quad[3]
     };
@@ -2242 +2271 @@
     Vector<FloatPoint> secondQuad = {
         quad[0],
-        side == BSTop || side == BSBottom ? FloatPoint(quad[0].x(), quad[1].y()) : FloatPoint(quad[1].x(), quad[0].y()),
+        side == BoxSide::Top || side == BoxSide::Bottom ? FloatPoint(quad[0].x(), quad[1].y()) : FloatPoint(quad[1].x(), quad[0].y()),
         quad[1],
         quad[2],
@@ -2256 +2285 @@
 bool RenderBoxModelObject::borderObscuresBackgroundEdge(const FloatSize& contextScale) const
 {
-    BorderEdge edges[4];
-    BorderEdge::getBorderEdgeInfo(edges, style(), document().deviceScaleFactor());
-
-    for (int i = BSTop; i <= BSLeft; ++i) {
-        const BorderEdge& currEdge = edges[i];
+    auto edges = borderEdges(style(), document().deviceScaleFactor());
+
+    for (auto side : allBoxSides) {
+        auto& currEdge = edges.at(side);
         // FIXME: for vertical text
-        float axisScale = (i == BSTop || i == BSBottom) ? contextScale.height() : contextScale.width();
+        float axisScale = (side == BoxSide::Top || side == BoxSide::Bottom) ? contextScale.height() : contextScale.width();
         if (!currEdge.obscuresBackgroundEdge(axisScale))
             return false;
@@ -2279 +2307 @@
         return false;
 
-    BorderEdge edges[4];
-    BorderEdge::getBorderEdgeInfo(edges, style(), document().deviceScaleFactor());
-
-    for (int i = BSTop; i <= BSLeft; ++i) {
-        const BorderEdge& currEdge = edges[i];
-        if (!currEdge.obscuresBackground())
+    auto edges = borderEdges(style(), document().deviceScaleFactor());
+
+    for (auto side : allBoxSides) {
+        if (!edges.at(side).obscuresBackground())
             return false;
     }

trunk/Source/WebCore/rendering/RenderBoxModelObject.h

@@ -26 +26 @@
 #include "FontBaseline.h"
 #include "LayoutRect.h"
+#include "RectEdges.h"
 #include "RenderLayerModelObject.h"
 
@@ -33 +34 @@
 enum LinePositionMode { PositionOnContainingLine, PositionOfInteriorLineBoxes };
 enum LineDirectionMode { HorizontalLine, VerticalLine };
-typedef unsigned BorderEdgeFlags;
 
 enum BackgroundBleedAvoidance {
@@ -63 +63 @@
 class RenderTextFragment;
 class StickyPositionViewportConstraints;
+
+enum class BoxSideFlag : uint8_t;
+using BoxSideSet = OptionSet<BoxSideFlag>;
+using BorderEdges = RectEdges<BorderEdge>;
 
 class BackgroundImageGeometry {
@@ -314 +318 @@
 
     void paintOneBorderSide(GraphicsContext&, const RenderStyle&, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-        const LayoutRect& sideRect, BoxSide, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdge[],
+        const LayoutRect& sideRect, BoxSide, BoxSide adjacentSide1, BoxSide adjacentSide2, const BorderEdges&,
         const Path*, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor = nullptr);
     void paintTranslucentBorderSides(GraphicsContext&, const RenderStyle&, const RoundedRect& outerBorder, const RoundedRect& innerBorder, const IntPoint& innerBorderAdjustment,
-        const BorderEdge[], BorderEdgeFlags, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false);
+        const BorderEdges&, BoxSideSet, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false);
     void paintBorderSides(GraphicsContext&, const RenderStyle&, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
-        const IntPoint& innerBorderAdjustment, const BorderEdge[], BorderEdgeFlags, BackgroundBleedAvoidance,
+        const IntPoint& innerBorderAdjustment, const BorderEdges&, BoxSideSet, BackgroundBleedAvoidance,
         bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false, const Color* overrideColor = nullptr);
-    void drawBoxSideFromPath(GraphicsContext&, const LayoutRect&, const Path&, const BorderEdge[],
+    void drawBoxSideFromPath(GraphicsContext&, const LayoutRect&, const Path&, const BorderEdges&,
         float thickness, float drawThickness, BoxSide, const RenderStyle&,
         Color, BorderStyle, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge);

trunk/Source/WebCore/rendering/RenderElement.cpp

@@ -1703 +1703 @@
     float thickness;
     float length;
-    if (side == BSTop || side == BSBottom) {
+    if (side == BoxSide::Top || side == BoxSide::Bottom) {
         thickness = y2 - y1;
         length = x2 - x1;
@@ -1749 +1749 @@
 
             switch (side) {
-            case BSTop:
-            case BSBottom:
+            case BoxSide::Top:
+            case BoxSide::Bottom:
                 drawBorderRect(snapRectToDevicePixels(LayoutRect(x1, y1, length, thirdOfThickness), deviceScaleFactor));
                 drawBorderRect(snapRectToDevicePixels(LayoutRect(x1, y2 - thirdOfThickness, length, thirdOfThickness), deviceScaleFactor));
                 break;
-            case BSLeft:
-            case BSRight:
+            case BoxSide::Left:
+            case BoxSide::Right:
                 drawBorderRect(snapRectToDevicePixels(LayoutRect(x1, y1, thirdOfThickness, length), deviceScaleFactor));
                 drawBorderRect(snapRectToDevicePixels(LayoutRect(x2 - thirdOfThickness, y1, thirdOfThickness, length), deviceScaleFactor));
@@ -1777 +1777 @@
             FloatRect paintBorderRect;
             switch (side) {
-            case BSTop:
+            case BoxSide::Top:
                 paintBorderRect = snapRectToDevicePixels(LayoutRect(x1 + mitreOffset1, y1, (x2 - mitreOffset3) - (x1 + mitreOffset1), thirdOfThickness), deviceScaleFactor);
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
@@ -1784 +1784 @@
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
                 break;
-            case BSLeft:
+            case BoxSide::Left:
                 paintBorderRect = snapRectToDevicePixels(LayoutRect(x1, y1 + mitreOffset1, thirdOfThickness, (y2 - mitreOffset3) - (y1 + mitreOffset1)), deviceScaleFactor);
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
@@ -1791 +1791 @@
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
                 break;
-            case BSBottom:
+            case BoxSide::Bottom:
                 paintBorderRect = snapRectToDevicePixels(LayoutRect(x1 + mitreOffset2, y1, (x2 - mitreOffset4) - (x1 + mitreOffset2), thirdOfThickness), deviceScaleFactor);
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
@@ -1798 +1798 @@
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
                 break;
-            case BSRight:
+            case BoxSide::Right:
                 paintBorderRect = snapRectToDevicePixels(LayoutRect(x1, y1 + mitreOffset2, thirdOfThickness, (y2 - mitreOffset4) - (y1 + mitreOffset2)), deviceScaleFactor);
                 drawLineFor(paintBorderRect, side, BorderStyle::Solid, FloatSize(adjacent1BigThird, adjacent2BigThird));
@@ -1834 +1834 @@
         float offset4 = 0;
 
-        if (((side == BSTop || side == BSLeft) && adjacentWidth1 < 0) || ((side == BSBottom || side == BSRight) && adjacentWidth1 > 0))
+        if (((side == BoxSide::Top || side == BoxSide::Left) && adjacentWidth1 < 0) || ((side == BoxSide::Bottom || side == BoxSide::Right) && adjacentWidth1 > 0))
             offset1 = floorToDevicePixel(adjacentWidth1 / 2, deviceScaleFactor);
 
-        if (((side == BSTop || side == BSLeft) && adjacentWidth2 < 0) || ((side == BSBottom || side == BSRight) && adjacentWidth2 > 0))
+        if (((side == BoxSide::Top || side == BoxSide::Left) && adjacentWidth2 < 0) || ((side == BoxSide::Bottom || side == BoxSide::Right) && adjacentWidth2 > 0))
             offset2 = ceilToDevicePixel(adjacentWidth2 / 2, deviceScaleFactor);
 
-        if (((side == BSTop || side == BSLeft) && adjacentWidth1 > 0) || ((side == BSBottom || side == BSRight) && adjacentWidth1 < 0))
+        if (((side == BoxSide::Top || side == BoxSide::Left) && adjacentWidth1 > 0) || ((side == BoxSide::Bottom || side == BoxSide::Right) && adjacentWidth1 < 0))
             offset3 = floorToDevicePixel(fabs(adjacentWidth1) / 2, deviceScaleFactor);
 
-        if (((side == BSTop || side == BSLeft) && adjacentWidth2 > 0) || ((side == BSBottom || side == BSRight) && adjacentWidth2 < 0))
+        if (((side == BoxSide::Top || side == BoxSide::Left) && adjacentWidth2 > 0) || ((side == BoxSide::Bottom || side == BoxSide::Right) && adjacentWidth2 < 0))
             offset4 = ceilToDevicePixel(adjacentWidth2 / 2, deviceScaleFactor);
 
@@ -1855 +1855 @@
 
         switch (side) {
-        case BSTop:
+        case BoxSide::Top:
             drawLineFor(FloatRect(FloatPoint(x1 + offset1, y1), FloatPoint(x2 - offset2, adjustedY)), side, s1, FloatSize(adjacent1BigHalf, adjacent2BigHalf));
             drawLineFor(FloatRect(FloatPoint(x1 + offset3, adjustedY), FloatPoint(x2 - offset4, y2)), side, s2, FloatSize(adjacent1SmallHalf, adjacent2SmallHalf));
             break;
-        case BSLeft:
+        case BoxSide::Left:
             drawLineFor(FloatRect(FloatPoint(x1, y1 + offset1), FloatPoint(adjustedX, y2 - offset2)), side, s1, FloatSize(adjacent1BigHalf, adjacent2BigHalf));
             drawLineFor(FloatRect(FloatPoint(adjustedX, y1 + offset3), FloatPoint(x2, y2 - offset4)), side, s2, FloatSize(adjacent1SmallHalf, adjacent2SmallHalf));
             break;
-        case BSBottom:
+        case BoxSide::Bottom:
             drawLineFor(FloatRect(FloatPoint(x1 + offset1, y1), FloatPoint(x2 - offset2, adjustedY)), side, s2, FloatSize(adjacent1BigHalf, adjacent2BigHalf));
             drawLineFor(FloatRect(FloatPoint(x1 + offset3, adjustedY), FloatPoint(x2 - offset4, y2)), side, s1, FloatSize(adjacent1SmallHalf, adjacent2SmallHalf));
             break;
-        case BSRight:
+        case BoxSide::Right:
             drawLineFor(FloatRect(FloatPoint(x1, y1 + offset1), FloatPoint(adjustedX, y2 - offset2)), side, s2, FloatSize(adjacent1BigHalf, adjacent2BigHalf));
             drawLineFor(FloatRect(FloatPoint(adjustedX, y1 + offset3), FloatPoint(x2, y2 - offset4)), side, s1, FloatSize(adjacent1SmallHalf, adjacent2SmallHalf));
@@ -1902 +1902 @@
         quad.reserveInitialCapacity(4);
         switch (side) {
-        case BSTop:
+        case BoxSide::Top:
             quad.uncheckedAppend({ x1 + std::max<float>(-adjacentWidth1, 0), y1 });
             quad.uncheckedAppend({ x1 + std::max<float>( adjacentWidth1, 0), y2 });
@@ -1908 +1908 @@
             quad.uncheckedAppend({ x2 - std::max<float>(-adjacentWidth2, 0), y1 });
             break;
-        case BSBottom:
+        case BoxSide::Bottom:
             quad.uncheckedAppend({ x1 + std::max<float>( adjacentWidth1, 0), y1 });
             quad.uncheckedAppend({ x1 + std::max<float>(-adjacentWidth1, 0), y2 });
@@ -1914 +1914 @@
             quad.uncheckedAppend({ x2 - std::max<float>( adjacentWidth2, 0), y1 });
             break;
-        case BSLeft:
+        case BoxSide::Left:
             quad.uncheckedAppend({ x1, y1 + std::max<float>(-adjacentWidth1, 0) });
             quad.uncheckedAppend({ x1, y2 - std::max<float>(-adjacentWidth2, 0) });
@@ -1920 +1920 @@
             quad.uncheckedAppend({ x2, y1 + std::max<float>( adjacentWidth1, 0) });
             break;
-        case BSRight:
+        case BoxSide::Right:
             quad.uncheckedAppend({ x1, y1 + std::max<float>( adjacentWidth1, 0) });
             quad.uncheckedAppend({ x1, y2 - std::max<float>( adjacentWidth2, 0) });
@@ -2084 +2084 @@
     float bottomInner = std::min(inner.maxY(), bottomOuter);
 
-    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(leftOuter, topOuter), FloatPoint(leftInner, bottomOuter)), BSLeft, outlineColor, outlineStyle, outlineWidth, outlineWidth);
-    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(leftOuter, topOuter), FloatPoint(rightOuter, topInner)), BSTop, outlineColor, outlineStyle, outlineWidth, outlineWidth);
-    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(rightInner, topOuter), FloatPoint(rightOuter, bottomOuter)), BSRight, outlineColor, outlineStyle, outlineWidth, outlineWidth);
-    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(leftOuter, bottomInner), FloatPoint(rightOuter, bottomOuter)), BSBottom, outlineColor, outlineStyle, outlineWidth, outlineWidth);
+    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(leftOuter, topOuter), FloatPoint(leftInner, bottomOuter)), BoxSide::Left, outlineColor, outlineStyle, outlineWidth, outlineWidth);
+    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(leftOuter, topOuter), FloatPoint(rightOuter, topInner)), BoxSide::Top, outlineColor, outlineStyle, outlineWidth, outlineWidth);
+    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(rightInner, topOuter), FloatPoint(rightOuter, bottomOuter)), BoxSide::Right, outlineColor, outlineStyle, outlineWidth, outlineWidth);
+    drawLineForBoxSide(graphicsContext, FloatRect(FloatPoint(leftOuter, bottomInner), FloatPoint(rightOuter, bottomOuter)), BoxSide::Bottom, outlineColor, outlineStyle, outlineWidth, outlineWidth);
 
     if (useTransparencyLayer)

trunk/Source/WebCore/rendering/RenderInline.cpp

@@ -1285 +1285 @@
         adjacentWidth2 = -outlineWidth;
     }
-    drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSLeft, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+    drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Left, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     
     // right edge
@@ -1304 +1304 @@
         adjacentWidth2 = -outlineWidth;
     }
-    drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSRight, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+    drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Right, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
 
     // upper edge
@@ -1318 +1318 @@
         } else
             adjacentWidth2 = outlineWidth;
-        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSTop, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Top, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     }
     
@@ -1332 +1332 @@
         bottomRight.move(outlineWidth, 0);
         adjacentWidth2 = outlineWidth;
-        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSTop, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Top, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     }
 
@@ -1342 +1342 @@
         bottomRight.move(outlineWidth, 0);
         adjacentWidth2 = outlineWidth;
-        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSTop, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Top, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     }
 
@@ -1357 +1357 @@
         } else
             adjacentWidth2 = outlineWidth;
-        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSBottom, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Bottom, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     }
     
@@ -1371 +1371 @@
         bottomRight.move(outlineWidth, outlineWidth);
         adjacentWidth2 = outlineWidth;
-        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSBottom, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Bottom, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     }
 
@@ -1381 +1381 @@
         bottomRight.move(outlineWidth, outlineWidth);
         adjacentWidth2 = outlineWidth;
-        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BSBottom, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
+        drawLineForBoxSide(graphicsContext, FloatRect(topLeft, bottomRight), BoxSide::Bottom, outlineColor, outlineStyle, adjacentWidth1, adjacentWidth2, antialias);
     }
 }

trunk/Source/WebCore/rendering/RenderMultiColumnSet.cpp

@@ -604 +604 @@
         LayoutUnit inlineDirectionSize = computedColumnWidth();
         BoxSide boxSide = isHorizontalWritingMode()
-            ? leftToRight ? BSLeft : BSRight
-            : leftToRight ? BSTop : BSBottom;
+            ? leftToRight ? BoxSide::Left : BoxSide::Right
+            : leftToRight ? BoxSide::Top : BoxSide::Bottom;
 
         for (unsigned i = 0; i < colCount; i++) {
@@ -646 +646 @@
         ruleRect.moveBy(paintOffset);
 
-        BoxSide boxSide = isHorizontalWritingMode() ? topToBottom ? BSTop : BSBottom : topToBottom ? BSLeft : BSRight;
+        BoxSide boxSide = isHorizontalWritingMode() ? topToBottom ? BoxSide::Top : BoxSide::Bottom : topToBottom ? BoxSide::Left : BoxSide::Right;
 
         LayoutSize step(0_lu, topToBottom ? computedColumnHeight() + colGap : -(computedColumnHeight() + colGap));

trunk/Source/WebCore/rendering/RenderObject.cpp

@@ -1827 +1827 @@
     enum Operation { Darken, Lighten };
 
-    Operation operation = (side == BSTop || side == BSLeft) == (style == BorderStyle::Inset) ? Darken : Lighten;
+    Operation operation = (side == BoxSide::Top || side == BoxSide::Left) == (style == BorderStyle::Inset) ? Darken : Lighten;
 
     // Here we will darken the border decoration color when needed. This will yield a similar behavior as in FF.

trunk/Source/WebCore/rendering/RenderObjectEnums.h

@@ -48 +48 @@
 };
 
-// Sides used when drawing borders and outlines. The values should run clockwise from top.
-enum BoxSide {
-    BSTop,
-    BSRight,
-    BSBottom,
-    BSLeft
-};
-
 enum MarkingBehavior {
     MarkOnlyThis,

trunk/Source/WebCore/rendering/RenderTableCell.cpp

@@ -1252 +1252 @@
     // precedence paint on top of borders with lower precedence.  
     CollapsedBorders borders;
-    borders.addBorder(topVal, BSTop, renderTop, borderRect.x(), borderRect.y(), borderRect.maxX(), borderRect.y() + topWidth, topStyle);
-    borders.addBorder(bottomVal, BSBottom, renderBottom, borderRect.x(), borderRect.maxY() - bottomWidth, borderRect.maxX(), borderRect.maxY(), bottomStyle);
-    borders.addBorder(leftVal, BSLeft, renderLeft, borderRect.x(), borderRect.y(), borderRect.x() + leftWidth, borderRect.maxY(), leftStyle);
-    borders.addBorder(rightVal, BSRight, renderRight, borderRect.maxX() - rightWidth, borderRect.y(), borderRect.maxX(), borderRect.maxY(), rightStyle);
+    borders.addBorder(topVal, BoxSide::Top, renderTop, borderRect.x(), borderRect.y(), borderRect.maxX(), borderRect.y() + topWidth, topStyle);
+    borders.addBorder(bottomVal, BoxSide::Bottom, renderBottom, borderRect.x(), borderRect.maxY() - bottomWidth, borderRect.maxX(), borderRect.maxY(), bottomStyle);
+    borders.addBorder(leftVal, BoxSide::Left, renderLeft, borderRect.x(), borderRect.y(), borderRect.x() + leftWidth, borderRect.maxY(), leftStyle);
+    borders.addBorder(rightVal, BoxSide::Right, renderRight, borderRect.maxX() - rightWidth, borderRect.y(), borderRect.maxX(), borderRect.maxY(), rightStyle);
 
     bool antialias = shouldAntialiasLines(graphicsContext);

trunk/Source/WebCore/rendering/RenderTableSection.cpp

@@ -1097 +1097 @@
     bool isLastRow = row + 1 == m_grid.size();
     if (style().isHorizontalWritingMode())
-        return m_rowPos[row] + (!row && borderSide == BSRight ? -outerBorderTop(&style()) : isLastRow && borderSide == BSLeft ? outerBorderTop(&style()) : 0_lu);
+        return m_rowPos[row] + (!row && borderSide == BoxSide::Right ? -outerBorderTop(&style()) : isLastRow && borderSide == BoxSide::Left ? outerBorderTop(&style()) : 0_lu);
     if (style().isLeftToRightDirection())
-        return (cell ? cell->y() + cell->height() : 0_lu) + (borderSide == BSLeft ? outerBorderTop(&style()) : 0_lu);
-    return borderSide == BSRight ? -outerBorderTop(&style()) : 0_lu;
+        return (cell ? cell->y() + cell->height() : 0_lu) + (borderSide == BoxSide::Left ? outerBorderTop(&style()) : 0_lu);
+    return borderSide == BoxSide::Right ? -outerBorderTop(&style()) : 0_lu;
 }
 
@@ -1134 +1134 @@
     bool antialias = shouldAntialiasLines(paintInfo.context());
     LayoutRect rowGroupRect = LayoutRect(paintOffset, size());
-    rowGroupRect.moveBy(-LayoutPoint(outerBorderLeft(&style), (borderSide == BSRight) ? 0_lu : outerBorderTop(&style)));
+    rowGroupRect.moveBy(-LayoutPoint(outerBorderLeft(&style), (borderSide == BoxSide::Right) ? 0_lu : outerBorderTop(&style)));
 
     switch (borderSide) {
-    case BSTop:
+    case BoxSide::Top:
         paintRowGroupBorder(paintInfo, antialias, LayoutRect(paintOffset.x() + offsetLeftForRowGroupBorder(cell, rowGroupRect, row), rowGroupRect.y(), 
-            horizontalRowGroupBorderWidth(cell, rowGroupRect, row, column), LayoutUnit(style.borderTop().width())), BSTop, CSSPropertyBorderTopColor, style.borderTopStyle(), table()->style().borderTopStyle());
+            horizontalRowGroupBorderWidth(cell, rowGroupRect, row, column), LayoutUnit(style.borderTop().width())), BoxSide::Top, CSSPropertyBorderTopColor, style.borderTopStyle(), table()->style().borderTopStyle());
         break;
-    case BSBottom:
+    case BoxSide::Bottom:
         paintRowGroupBorder(paintInfo, antialias, LayoutRect(paintOffset.x() + offsetLeftForRowGroupBorder(cell, rowGroupRect, row), rowGroupRect.y() + rowGroupRect.height(), 
-            horizontalRowGroupBorderWidth(cell, rowGroupRect, row, column), LayoutUnit(style.borderBottom().width())), BSBottom, CSSPropertyBorderBottomColor, style.borderBottomStyle(), table()->style().borderBottomStyle());
+            horizontalRowGroupBorderWidth(cell, rowGroupRect, row, column), LayoutUnit(style.borderBottom().width())), BoxSide::Bottom, CSSPropertyBorderBottomColor, style.borderBottomStyle(), table()->style().borderBottomStyle());
         break;
-    case BSLeft:
+    case BoxSide::Left:
         paintRowGroupBorder(paintInfo, antialias, LayoutRect(rowGroupRect.x(), rowGroupRect.y() + offsetTopForRowGroupBorder(cell, borderSide, row), LayoutUnit(style.borderLeft().width()),
-            verticalRowGroupBorderHeight(cell, rowGroupRect, row)), BSLeft, CSSPropertyBorderLeftColor, style.borderLeftStyle(), table()->style().borderLeftStyle());
+            verticalRowGroupBorderHeight(cell, rowGroupRect, row)), BoxSide::Left, CSSPropertyBorderLeftColor, style.borderLeftStyle(), table()->style().borderLeftStyle());
         break;
-    case BSRight:
+    case BoxSide::Right:
         paintRowGroupBorder(paintInfo, antialias, LayoutRect(rowGroupRect.x() + rowGroupRect.width(), rowGroupRect.y() + offsetTopForRowGroupBorder(cell, borderSide, row), LayoutUnit(style.borderRight().width()),
-            verticalRowGroupBorderHeight(cell, rowGroupRect, row)), BSRight, CSSPropertyBorderRightColor, style.borderRightStyle(), table()->style().borderRightStyle());
+            verticalRowGroupBorderHeight(cell, rowGroupRect, row)), BoxSide::Right, CSSPropertyBorderRightColor, style.borderRightStyle(), table()->style().borderRightStyle());
         break;
     default:
@@ -1165 +1165 @@
     case CBSStart:
         if (styleForCellFlow->isHorizontalWritingMode())
-            return styleForCellFlow->isLeftToRightDirection() ? BSLeft : BSRight;
-        return styleForCellFlow->isLeftToRightDirection() ? BSTop : BSBottom;
+            return styleForCellFlow->isLeftToRightDirection() ? BoxSide::Left : BoxSide::Right;
+        return styleForCellFlow->isLeftToRightDirection() ? BoxSide::Top : BoxSide::Bottom;
     case CBSEnd:
         if (styleForCellFlow->isHorizontalWritingMode())
-            return styleForCellFlow->isLeftToRightDirection() ? BSRight : BSLeft;
-        return styleForCellFlow->isLeftToRightDirection() ? BSBottom : BSTop;
+            return styleForCellFlow->isLeftToRightDirection() ? BoxSide::Right : BoxSide::Left;
+        return styleForCellFlow->isLeftToRightDirection() ? BoxSide::Bottom : BoxSide::Top;
     case CBSBefore:
         if (styleForCellFlow->isHorizontalWritingMode())
-            return BSTop;
-        return styleForCellFlow->isLeftToRightDirection() ? BSRight : BSLeft;
+            return BoxSide::Top;
+        return styleForCellFlow->isLeftToRightDirection() ? BoxSide::Right : BoxSide::Left;
     case CBSAfter:
         if (styleForCellFlow->isHorizontalWritingMode())
-            return BSBottom;
-        return styleForCellFlow->isLeftToRightDirection() ? BSLeft : BSRight;
+            return BoxSide::Bottom;
+        return styleForCellFlow->isLeftToRightDirection() ? BoxSide::Left : BoxSide::Right;
     default:
         ASSERT_NOT_REACHED();
-        return BSLeft;
+        return BoxSide::Left;
     }
 }

trunk/Source/WebCore/rendering/RenderThemeIOS.mm

@@ -696 +696 @@
     float separatorPosition = isRTL ? (clip.x() + MenuListButtonPaddingAfter) : (clip.maxX() - MenuListButtonPaddingAfter);
 
-    box.drawLineForBoxSide(paintInfo.context(), FloatRect(FloatPoint(separatorPosition - borderTopWidth, clip.y()), FloatPoint(separatorPosition, clip.maxY())), BSRight, style.visitedDependentColor(CSSPropertyBorderTopColor), style.borderTopStyle(), 0, 0);
+    box.drawLineForBoxSide(paintInfo.context(), FloatRect(FloatPoint(separatorPosition - borderTopWidth, clip.y()), FloatPoint(separatorPosition, clip.maxY())), BoxSide::Right, style.visitedDependentColor(CSSPropertyBorderTopColor), style.borderTopStyle(), 0, 0);
 
     FloatRect buttonClip;

trunk/Source/WebCore/rendering/style/NinePieceImage.h

@@ -83 +83 @@
 }
 
-inline Optional<PhysicalBoxSide> imagePieceHorizontalSide(ImagePiece piece)
+inline Optional<BoxSide> imagePieceHorizontalSide(ImagePiece piece)
 {
     if (piece == TopLeftPiece || piece == TopPiece || piece == TopRightPiece)
-        return PhysicalBoxSide::Top;
+        return BoxSide::Top;
 
     if (piece == BottomLeftPiece || piece == BottomPiece || piece == BottomRightPiece)
-        return PhysicalBoxSide::Bottom;
+        return BoxSide::Bottom;
 
     return WTF::nullopt;
 }
 
-inline Optional<PhysicalBoxSide> imagePieceVerticalSide(ImagePiece piece)
+inline Optional<BoxSide> imagePieceVerticalSide(ImagePiece piece)
 {
     if (piece == TopLeftPiece || piece == LeftPiece || piece == BottomLeftPiece)
-        return PhysicalBoxSide::Left;
+        return BoxSide::Left;
 
     if (piece == TopRightPiece || piece == RightPiece || piece == BottomRightPiece)
-        return PhysicalBoxSide::Right;
+        return BoxSide::Right;
 
     return WTF::nullopt;

trunk/Source/WebKit/ChangeLog

@@ +1 @@
+2020-10-31  Simon Fraser  <simon.fraser@apple.com>
+
+        Clean up BoxSide and BorderEdge code
+        https://bugs.webkit.org/show_bug.cgi?id=218197
+
+        Reviewed by Sam Weinig.
+
+        * UIProcess/ios/WKKeyboardScrollingAnimator.mm:
+        (boxSide):
+
 2020-10-30  Brian Burg  <bburg@apple.com>
 

trunk/Source/WebKit/UIProcess/ios/WKKeyboardScrollingAnimator.mm

@@ -164 +164 @@
 }
 
-static WebCore::PhysicalBoxSide boxSide(WebKit::ScrollingDirection direction)
+static WebCore::BoxSide boxSide(WebKit::ScrollingDirection direction)
 {
     switch (direction) {
     case WebKit::ScrollingDirection::Up:
-        return WebCore::PhysicalBoxSide::Top;
+        return WebCore::BoxSide::Top;
     case WebKit::ScrollingDirection::Down:
-        return WebCore::PhysicalBoxSide::Bottom;
+        return WebCore::BoxSide::Bottom;
     case WebKit::ScrollingDirection::Left:
-        return WebCore::PhysicalBoxSide::Left;
+        return WebCore::BoxSide::Left;
     case WebKit::ScrollingDirection::Right:
-        return WebCore::PhysicalBoxSide::Right;
+        return WebCore::BoxSide::Right;
     }
 }