C++11: Replace 0 with nullptr where applicable in layout code.

Source/core/layout/LayoutBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 34 matching lines @@
 
 enum ScrollOffsetClamping {
     ScrollOffsetUnclamped,
     ScrollOffsetClamped
 };
 
 struct LayoutBoxRareData {
     WTF_MAKE_NONCOPYABLE(LayoutBoxRareData); WTF_MAKE_FAST_ALLOCATED(LayoutBoxRareData);
 public:
     LayoutBoxRareData()
-        : m_inlineBoxWrapper(0)
-        , m_spannerPlaceholder(0)
+        : m_inlineBoxWrapper(nullptr)
+        , m_spannerPlaceholder(nullptr)
         , m_overrideLogicalContentHeight(-1)
         , m_overrideLogicalContentWidth(-1)
         , m_previousBorderBoxSize(-1, -1)
     {
     }
 
     // For inline replaced elements, the inline box that owns us.
     InlineBox* m_inlineBoxWrapper;
 
     // For spanners, the spanner placeholder that lays us out within the multicol container.
@@ skipping 274 matching lines @@
     virtual LayoutUnit marginLeft() const override { return m_marginBoxOutsets.left(); }
     virtual LayoutUnit marginRight() const override { return m_marginBoxOutsets.right(); }
     void setMarginTop(LayoutUnit margin) { m_marginBoxOutsets.setTop(margin); }
     void setMarginBottom(LayoutUnit margin) { m_marginBoxOutsets.setBottom(margin); }
     void setMarginLeft(LayoutUnit margin) { m_marginBoxOutsets.setLeft(margin); }
     void setMarginRight(LayoutUnit margin) { m_marginBoxOutsets.setRight(margin); }
 
     LayoutUnit marginLogicalLeft() const { return m_marginBoxOutsets.logicalLeft(style()->writingMode()); }
     LayoutUnit marginLogicalRight() const { return m_marginBoxOutsets.logicalRight(style()->writingMode()); }
 
-    virtual LayoutUnit marginBefore(const ComputedStyle* overrideStyle = 0) const override final { return m_marginBoxOutsets.before((overrideStyle ? overrideStyle : style())->writingMode()); }
-    virtual LayoutUnit marginAfter(const ComputedStyle* overrideStyle = 0) const override final { return m_marginBoxOutsets.after((overrideStyle ? overrideStyle : style())->writingMode()); }
-    virtual LayoutUnit marginStart(const ComputedStyle* overrideStyle = 0) const override final
+    virtual LayoutUnit marginBefore(const ComputedStyle* overrideStyle = nullptr) const override final { return m_marginBoxOutsets.before((overrideStyle ? overrideStyle : style())->writingMode()); }
+    virtual LayoutUnit marginAfter(const ComputedStyle* overrideStyle = nullptr) const override final { return m_marginBoxOutsets.after((overrideStyle ? overrideStyle : style())->writingMode()); }
+    virtual LayoutUnit marginStart(const ComputedStyle* overrideStyle = nullptr) const override final
     {
         const ComputedStyle* styleToUse = overrideStyle ? overrideStyle : style();
         return m_marginBoxOutsets.start(styleToUse->writingMode(), styleToUse->direction());
     }
-    virtual LayoutUnit marginEnd(const ComputedStyle* overrideStyle = 0) const override final
+    virtual LayoutUnit marginEnd(const ComputedStyle* overrideStyle = nullptr) const override final
     {
         const ComputedStyle* styleToUse = overrideStyle ? overrideStyle : style();
         return m_marginBoxOutsets.end(styleToUse->writingMode(), styleToUse->direction());
     }
-    void setMarginBefore(LayoutUnit value, const ComputedStyle* overrideStyle = 0) { m_marginBoxOutsets.setBefore((overrideStyle ? overrideStyle : style())->writingMode(), value); }
-    void setMarginAfter(LayoutUnit value, const ComputedStyle* overrideStyle = 0) { m_marginBoxOutsets.setAfter((overrideStyle ? overrideStyle : style())->writingMode(), value); }
-    void setMarginStart(LayoutUnit value, const ComputedStyle* overrideStyle = 0)
+    void setMarginBefore(LayoutUnit value, const ComputedStyle* overrideStyle = nullptr) { m_marginBoxOutsets.setBefore((overrideStyle ? overrideStyle : style())->writingMode(), value); }
+    void setMarginAfter(LayoutUnit value, const ComputedStyle* overrideStyle = nullptr) { m_marginBoxOutsets.setAfter((overrideStyle ? overrideStyle : style())->writingMode(), value); }
+    void setMarginStart(LayoutUnit value, const ComputedStyle* overrideStyle = nullptr)
     {
         const ComputedStyle* styleToUse = overrideStyle ? overrideStyle : style();
         m_marginBoxOutsets.setStart(styleToUse->writingMode(), styleToUse->direction(), value);
     }
-    void setMarginEnd(LayoutUnit value, const ComputedStyle* overrideStyle = 0)
+    void setMarginEnd(LayoutUnit value, const ComputedStyle* overrideStyle = nullptr)
     {
         const ComputedStyle* styleToUse = overrideStyle ? overrideStyle : style();
         m_marginBoxOutsets.setEnd(styleToUse->writingMode(), styleToUse->direction(), value);
     }
 
     // The following functions are used to implement collapsing margins.
     // All objects know their maximal positive and negative margins.  The
     // formula for computing a collapsed margin is |maxPosMargin| - |maxNegmargin|.
     // For a non-collapsing box, such as a leaf element, this formula will simply return
     // the margin of the element.  Blocks override the maxMarginBefore and maxMarginAfter
@@ skipping 39 matching lines @@
     void setOverrideContainingBlockContentLogicalHeight(LayoutUnit);
     void clearContainingBlockOverrideSize();
     void clearOverrideContainingBlockContentLogicalHeight();
 
     LayoutUnit extraInlineOffset() const;
     LayoutUnit extraBlockOffset() const;
     void setExtraInlineOffset(LayoutUnit inlineOffest);
     void setExtraBlockOffset(LayoutUnit blockOffest);
     void clearExtraInlineAndBlockOffests();
 
-    virtual LayoutSize offsetFromContainer(const LayoutObject*, const LayoutPoint&, bool* offsetDependsOnPoint = 0) const override;
+    virtual LayoutSize offsetFromContainer(const LayoutObject*, const LayoutPoint&, bool* offsetDependsOnPoint = nullptr) const override;
 
     LayoutUnit adjustBorderBoxLogicalWidthForBoxSizing(LayoutUnit width) const;
     LayoutUnit adjustBorderBoxLogicalHeightForBoxSizing(LayoutUnit height) const;
     LayoutUnit adjustContentBoxLogicalWidthForBoxSizing(LayoutUnit width) const;
     LayoutUnit adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit height) const;
 
     struct ComputedMarginValues {
         ComputedMarginValues() { }
 
         LayoutUnit m_before;
@@ skipping 32 matching lines @@
     // the replaced LayoutObject to quickly determine what line it is contained on and to easily
     // iterate over structures on the line.
     InlineBox* inlineBoxWrapper() const { return m_rareData ? m_rareData->m_inlineBoxWrapper : 0; }
     void setInlineBoxWrapper(InlineBox*);
     void deleteLineBoxWrapper();
 
     void setSpannerPlaceholder(LayoutMultiColumnSpannerPlaceholder&);
     void clearSpannerPlaceholder();
     virtual LayoutMultiColumnSpannerPlaceholder* spannerPlaceholder() const final { return m_rareData ? m_rareData->m_spannerPlaceholder : 0; }
 
-    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = 0) const override;
+    virtual LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override;
     virtual void mapRectToPaintInvalidationBacking(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState*) const override;
     virtual void invalidatePaintForOverhangingFloats(bool paintAllDescendants);
 
     LayoutUnit containingBlockLogicalHeightForGetComputedStyle() const;
 
     virtual LayoutUnit containingBlockLogicalWidthForContent() const override;
     LayoutUnit containingBlockLogicalHeightForContent(AvailableLogicalHeightType) const;
 
     LayoutUnit containingBlockAvailableLineWidth() const;
     LayoutUnit perpendicularContainingBlockLogicalHeight() const;
@@ skipping 77 matching lines @@
     virtual bool scrollsOverflowY() const { return hasOverflowClip() && (style()->overflowY() == OSCROLL || hasAutoVerticalScrollbar()); }
     bool usesCompositedScrolling() const;
 
     // Elements such as the <input> field override this to specify that they are scrollable
     // outside the context of the CSS overflow style
     virtual bool isIntrinsicallyScrollable(ScrollbarOrientation orientation) const { return false; }
 
     bool hasUnsplittableScrollingOverflow() const;
     bool isUnsplittableForPagination() const;
 
-    virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0) override;
+    virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = nullptr) override;
 
     virtual LayoutRect overflowClipRect(const LayoutPoint& location, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize);
     LayoutRect clipRect(const LayoutPoint& location);
     virtual bool hasControlClip() const { return false; }
     virtual LayoutRect controlClipRect(const LayoutPoint&) const { return LayoutRect(); }
 
     virtual void paintObject(const PaintInfo&, const LayoutPoint&) { ASSERT_NOT_REACHED(); }
     virtual void paintBoxDecorationBackground(const PaintInfo&, const LayoutPoint&);
     virtual void paintMask(const PaintInfo&, const LayoutPoint&);
-    virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) override;
+    virtual void imageChanged(WrappedImagePtr, const IntRect* = nullptr) override;
 
     void logicalExtentAfterUpdatingLogicalWidth(const LayoutUnit& logicalTop, LogicalExtentComputedValues&);
 
     virtual PositionWithAffinity positionForPoint(const LayoutPoint&) override;
 
     void removeFloatingOrPositionedChildFromBlockLists();
 
     DeprecatedPaintLayer* enclosingFloatPaintingLayer() const;
 
     virtual int firstLineBoxBaseline() const { return -1; }
@@ skipping 99 matching lines @@
             return false;
 
         LayoutRect layoutOverflowRect = m_overflow->layoutOverflowRect();
         LayoutRect noOverflowRect = this->noOverflowRect();
         return layoutOverflowRect.y() < noOverflowRect.y() || layoutOverflowRect.maxY() > noOverflowRect.maxY();
     }
 
     virtual LayoutBox* createAnonymousBoxWithSameTypeAs(const LayoutObject*) const
     {
         ASSERT_NOT_REACHED();
-        return 0;
+        return nullptr;
     }
 
     bool hasSameDirectionAs(const LayoutBox* object) const { return style()->direction() == object->style()->direction(); }
 
     ShapeOutsideInfo* shapeOutsideInfo() const
     {
-        return ShapeOutsideInfo::isEnabledFor(*this) ? ShapeOutsideInfo::info(*this) : 0;
+        return ShapeOutsideInfo::isEnabledFor(*this) ? ShapeOutsideInfo::info(*this) : nullptr;
     }
 
     void markShapeOutsideDependentsForLayout()
     {
         if (isFloating())
             removeFloatingOrPositionedChildFromBlockLists();
     }
 
     bool backgroundHasOpaqueTopLayer() const;
 
@@ skipping 14 matching lines @@
     virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const;
     virtual bool computeBackgroundIsKnownToBeObscured() override;
 
     void computePositionedLogicalWidth(LogicalExtentComputedValues&) const;
 
     LayoutUnit computeIntrinsicLogicalWidthUsing(const Length& logicalWidthLength, LayoutUnit availableLogicalWidth, LayoutUnit borderAndPadding) const;
     LayoutUnit computeIntrinsicLogicalContentHeightUsing(const Length& logicalHeightLength, LayoutUnit intrinsicContentHeight, LayoutUnit borderAndPadding) const;
 
     virtual bool shouldComputeSizeAsReplaced() const { return isReplaced() && !isInlineBlockOrInlineTable(); }
 
-    virtual void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = 0) const override;
+    virtual void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = nullptr, const PaintInvalidationState* = nullptr) const override;
     virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const override;
 
     LayoutObject* splitAnonymousBoxesAroundChild(LayoutObject* beforeChild);
 
     virtual void addLayerHitTestRects(LayerHitTestRects&, const DeprecatedPaintLayer* currentCompositedLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const override;
     virtual void computeSelfHitTestRects(Vector<LayoutRect>&, const LayoutPoint& layerOffset) const override;
 
     virtual PaintInvalidationReason paintInvalidationReason(const LayoutBoxModelObject& paintInvalidationContainer,
         const LayoutRect& oldBounds, const LayoutPoint& oldPositionFromPaintInvalidationContainer,
         const LayoutRect& newBounds, const LayoutPoint& newPositionFromPaintInvalidationContainer) const override;
@@ skipping 145 matching lines @@
 inline LayoutBox* LayoutBox::lastChildBox() const
 {
     return toLayoutBox(slowLastChild());
 }
 
 inline LayoutBox* LayoutBox::previousSiblingMultiColumnBox() const
 {
     ASSERT(isLayoutMultiColumnSpannerPlaceholder() || isLayoutMultiColumnSet());
     LayoutBox* previousBox = previousSiblingBox();
     if (previousBox->isLayoutFlowThread())
-        return 0;
+        return nullptr;
     return previousBox;
 }
 
 inline LayoutBox* LayoutBox::nextSiblingMultiColumnBox() const
 {
     ASSERT(isLayoutMultiColumnSpannerPlaceholder() || isLayoutMultiColumnSet());
     return nextSiblingBox();
 }
 
 inline void LayoutBox::setInlineBoxWrapper(InlineBox* boxWrapper)
 {
     if (boxWrapper) {
         ASSERT(!inlineBoxWrapper());
         // m_inlineBoxWrapper should already be 0. Deleting it is a safeguard against security issues.
         // Otherwise, there will two line box wrappers keeping the reference to this layoutObject, and
         // only one will be notified when the layoutObject is getting destroyed. The second line box wrapper
         // will keep a stale reference.
-        if (UNLIKELY(inlineBoxWrapper() != 0))
+        if (UNLIKELY(inlineBoxWrapper() != nullptr))
             deleteLineBoxWrapper();
     }
 
     ensureRareData().m_inlineBoxWrapper = boxWrapper;
 }
 
 } // namespace blink
 
 #endif // LayoutBox_h