/*
* 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.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef RenderBox_h
#define RenderBox_h
#include "RenderBoxModelObject.h"
#include "RenderOverflow.h"
#include "ScrollTypes.h"
namespace WebCore {
struct PaintInfo;
enum LogicalWidthType { LogicalWidth, MinLogicalWidth, MaxLogicalWidth };
enum OverlayScrollbarSizeRelevancy { IgnoreOverlayScrollbarSize, IncludeOverlayScrollbarSize };
class RenderBox : public RenderBoxModelObject {
public:
RenderBox(Node*);
virtual ~RenderBox();
// Use this with caution! No type checking is done!
RenderBox* firstChildBox() const;
RenderBox* lastChildBox() const;
int x() const { return m_frameRect.x(); }
int y() const { return m_frameRect.y(); }
int width() const { return m_frameRect.width(); }
int height() const { return m_frameRect.height(); }
void setX(int x) { m_frameRect.setX(x); }
void setY(int y) { m_frameRect.setY(y); }
void setWidth(int width) { m_frameRect.setWidth(width); }
void setHeight(int height) { m_frameRect.setHeight(height); }
int logicalLeft() const { return style()->isHorizontalWritingMode() ? x() : y(); }
int logicalRight() const { return logicalLeft() + logicalWidth(); }
int logicalTop() const { return style()->isHorizontalWritingMode() ? y() : x(); }
int logicalBottom() const { return logicalTop() + logicalHeight(); }
int logicalWidth() const { return style()->isHorizontalWritingMode() ? width() : height(); }
int logicalHeight() const { return style()->isHorizontalWritingMode() ? height() : width(); }
void setLogicalLeft(int left)
{
if (style()->isHorizontalWritingMode())
setX(left);
else
setY(left);
}
void setLogicalTop(int top)
{
if (style()->isHorizontalWritingMode())
setY(top);
else
setX(top);
}
void setLogicalWidth(int size)
{
if (style()->isHorizontalWritingMode())
setWidth(size);
else
setHeight(size);
}
void setLogicalHeight(int size)
{
if (style()->isHorizontalWritingMode())
setHeight(size);
else
setWidth(size);
}
void setLogicalLocation(int left, int top)
{
if (style()->isHorizontalWritingMode())
setLocation(left, top);
else
setLocation(top, left);
}
IntPoint location() const { return m_frameRect.location(); }
IntSize locationOffset() const { return IntSize(x(), y()); }
IntSize size() const { return m_frameRect.size(); }
void setLocation(const IntPoint& location) { m_frameRect.setLocation(location); }
void setLocation(int x, int y) { setLocation(IntPoint(x, y)); }
void setSize(const IntSize& size) { m_frameRect.setSize(size); }
void move(int dx, int dy) { m_frameRect.move(dx, dy); }
IntRect frameRect() const { return m_frameRect; }
void setFrameRect(const IntRect& rect) { m_frameRect = rect; }
IntRect borderBoxRect() const { return IntRect(0, 0, width(), height()); }
virtual IntRect borderBoundingBox() const { return borderBoxRect(); }
// The content area of the box (excludes padding and border).
IntRect contentBoxRect() const { return IntRect(borderLeft() + paddingLeft(), borderTop() + paddingTop(), contentWidth(), contentHeight()); }
// The content box in absolute coords. Ignores transforms.
IntRect absoluteContentBox() const;
// The content box converted to absolute coords (taking transforms into account).
FloatQuad absoluteContentQuad() const;
// Bounds of the outline box in absolute coords. Respects transforms
virtual IntRect outlineBoundsForRepaint(RenderBoxModelObject* /*repaintContainer*/, IntPoint* cachedOffsetToRepaintContainer) const;
virtual void addFocusRingRects(Vector<IntRect>&, int tx, int ty);
// Use this with caution! No type checking is done!
RenderBox* previousSiblingBox() const;
RenderBox* nextSiblingBox() const;
RenderBox* parentBox() const;
// Visual and layout overflow are in the coordinate space of the box. This means that they aren't purely physical directions.
// For horizontal-tb and vertical-lr they will match physical directions, but for horizontal-bt and vertical-rl, the top/bottom and left/right
// respectively are flipped when compared to their physical counterparts. For example minX is on the left in vertical-lr,
// but it is on the right in vertical-rl.
IntRect layoutOverflowRect() const { return m_overflow ? m_overflow->layoutOverflowRect() : clientBoxRect(); }
int minYLayoutOverflow() const { return m_overflow? m_overflow->minYLayoutOverflow() : borderTop(); }
int maxYLayoutOverflow() const { return m_overflow ? m_overflow->maxYLayoutOverflow() : borderTop() + clientHeight(); }
int minXLayoutOverflow() const { return m_overflow ? m_overflow->minXLayoutOverflow() : borderLeft(); }
int maxXLayoutOverflow() const { return m_overflow ? m_overflow->maxXLayoutOverflow() : borderLeft() + clientWidth(); }
int logicalLeftLayoutOverflow() const { return style()->isHorizontalWritingMode() ? minXLayoutOverflow() : minYLayoutOverflow(); }
int logicalRightLayoutOverflow() const { return style()->isHorizontalWritingMode() ? maxXLayoutOverflow() : maxYLayoutOverflow(); }
IntRect visualOverflowRect() const { return m_overflow ? m_overflow->visualOverflowRect() : borderBoxRect(); }
int minYVisualOverflow() const { return m_overflow? m_overflow->minYVisualOverflow() : 0; }
int maxYVisualOverflow() const { return m_overflow ? m_overflow->maxYVisualOverflow() : height(); }
int minXVisualOverflow() const { return m_overflow ? m_overflow->minXVisualOverflow() : 0; }
int maxXVisualOverflow() const { return m_overflow ? m_overflow->maxXVisualOverflow() : width(); }
int logicalLeftVisualOverflow() const { return style()->isHorizontalWritingMode() ? minXVisualOverflow() : minYVisualOverflow(); }
int logicalRightVisualOverflow() const { return style()->isHorizontalWritingMode() ? maxXVisualOverflow() : maxYVisualOverflow(); }
void addLayoutOverflow(const IntRect&);
void addVisualOverflow(const IntRect&);
void addShadowOverflow();
void addOverflowFromChild(RenderBox* child) { addOverflowFromChild(child, IntSize(child->x(), child->y())); }
void addOverflowFromChild(RenderBox* child, const IntSize& delta);
void clearLayoutOverflow();
void updateLayerTransform();
void blockDirectionOverflow(bool isLineHorizontal, int& logicalTopLayoutOverflow, int& logicalBottomLayoutOverflow,
int& logicalTopVisualOverflow, int& logicalBottomVisualOverflow);
int contentWidth() const { return clientWidth() - paddingLeft() - paddingRight(); }
int contentHeight() const { return clientHeight() - paddingTop() - paddingBottom(); }
int contentLogicalWidth() const { return style()->isHorizontalWritingMode() ? contentWidth() : contentHeight(); }
int contentLogicalHeight() const { return style()->isHorizontalWritingMode() ? contentHeight() : contentWidth(); }
// IE extensions. Used to calculate offsetWidth/Height. Overridden by inlines (RenderFlow)
// to return the remaining width on a given line (and the height of a single line).
virtual int offsetWidth() const { return width(); }
virtual int offsetHeight() const { return height(); }
// More IE extensions. clientWidth and clientHeight represent the interior of an object
// excluding border and scrollbar. clientLeft/Top are just the borderLeftWidth and borderTopWidth.
int clientLeft() const { return borderLeft(); }
int clientTop() const { return borderTop(); }
int clientWidth() const;
int clientHeight() const;
int clientLogicalWidth() const { return style()->isHorizontalWritingMode() ? clientWidth() : clientHeight(); }
int clientLogicalHeight() const { return style()->isHorizontalWritingMode() ? clientHeight() : clientWidth(); }
int clientLogicalBottom() const { return borderBefore() + clientLogicalHeight(); }
IntRect clientBoxRect() const { return IntRect(clientLeft(), clientTop(), clientWidth(), clientHeight()); }
// scrollWidth/scrollHeight will be the same as clientWidth/clientHeight unless the
// object has overflow:hidden/scroll/auto specified and also has overflow.
// scrollLeft/Top return the current scroll position. These methods are virtual so that objects like
// textareas can scroll shadow content (but pretend that they are the objects that are
// scrolling).
virtual int scrollLeft() const;
virtual int scrollTop() const;
virtual int scrollWidth() const;
virtual int scrollHeight() const;
virtual void setScrollLeft(int);
virtual void setScrollTop(int);
virtual int marginTop() const { return m_marginTop; }
virtual int marginBottom() const { return m_marginBottom; }
virtual int marginLeft() const { return m_marginLeft; }
virtual int marginRight() const { return m_marginRight; }
void setMarginTop(int margin) { m_marginTop = margin; }
void setMarginBottom(int margin) { m_marginBottom = margin; }
void setMarginLeft(int margin) { m_marginLeft = margin; }
void setMarginRight(int margin) { m_marginRight = margin; }
virtual int marginBefore() const;
virtual int marginAfter() const;
virtual int marginStart() const;
virtual int marginEnd() const;
void setMarginStart(int);
void setMarginEnd(int);
void setMarginBefore(int);
void setMarginAfter(int);
// The following five 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
// methods.
enum MarginSign { PositiveMargin, NegativeMargin };
virtual bool isSelfCollapsingBlock() const { return false; }
virtual int collapsedMarginBefore() const { return marginBefore(); }
virtual int collapsedMarginAfter() const { return marginAfter(); }
virtual void absoluteRects(Vector<IntRect>&, int tx, int ty);
virtual void absoluteQuads(Vector<FloatQuad>&);
IntRect reflectionBox() const;
int reflectionOffset() const;
// Given a rect in the object's coordinate space, returns the corresponding rect in the reflection.
IntRect reflectedRect(const IntRect&) const;
virtual void layout();
virtual void paint(PaintInfo&, int tx, int ty);
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
virtual void destroy();
virtual int minPreferredLogicalWidth() const;
virtual int maxPreferredLogicalWidth() const;
int overrideSize() const;
int overrideWidth() const;
int overrideHeight() const;
virtual void setOverrideSize(int);
virtual IntSize offsetFromContainer(RenderObject*, const IntPoint&) const;
int computeBorderBoxLogicalWidth(int width) const;
int computeBorderBoxLogicalHeight(int height) const;
int computeContentBoxLogicalWidth(int width) const;
int computeContentBoxLogicalHeight(int height) const;
virtual void borderFitAdjust(int& /*x*/, int& /*w*/) const { } // Shrink the box in which the border paints if border-fit is set.
// Resolve auto margins in the inline direction of the containing block so that objects can be pushed to the start, middle or end
// of the containing block.
void computeInlineDirectionMargins(RenderBlock* containingBlock, int containerWidth, int childWidth);
// Used to resolve margins in the containing block's block-flow direction.
void computeBlockDirectionMargins(RenderBlock* containingBlock);
void positionLineBox(InlineBox*);
virtual InlineBox* createInlineBox();
void dirtyLineBoxes(bool fullLayout);
// For inline replaced elements, this function returns the inline box that owns us. Enables
// the replaced RenderObject to quickly determine what line it is contained on and to easily
// iterate over structures on the line.
InlineBox* inlineBoxWrapper() const { return m_inlineBoxWrapper; }
void setInlineBoxWrapper(InlineBox* boxWrapper) { m_inlineBoxWrapper = boxWrapper; }
void deleteLineBoxWrapper();
virtual IntRect clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer);
virtual void computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect&, bool fixed = false);
virtual void repaintDuringLayoutIfMoved(const IntRect&);
virtual int containingBlockLogicalWidthForContent() const;
int perpendicularContainingBlockLogicalHeight() const;
virtual void computeLogicalWidth();
virtual void computeLogicalHeight();
bool stretchesToViewport() const
{
return document()->inQuirksMode() && style()->logicalHeight().isAuto() && !isFloatingOrPositioned() && (isRoot() || isBody());
}
virtual IntSize intrinsicSize() const { return IntSize(); }
int intrinsicLogicalWidth() const { return style()->isHorizontalWritingMode() ? intrinsicSize().width() : intrinsicSize().height(); }
int intrinsicLogicalHeight() const { return style()->isHorizontalWritingMode() ? intrinsicSize().height() : intrinsicSize().width(); }
// Whether or not the element shrinks to its intrinsic width (rather than filling the width
// of a containing block). HTML4 buttons, <select>s, <input>s, legends, and floating/compact elements do this.
bool sizesToIntrinsicLogicalWidth(LogicalWidthType) const;
virtual bool stretchesToMinIntrinsicLogicalWidth() const { return false; }
int computeLogicalWidthUsing(LogicalWidthType, int availableLogicalWidth);
int computeLogicalHeightUsing(const Length& height);
int computeReplacedLogicalWidthUsing(Length width) const;
int computeReplacedLogicalHeightUsing(Length height) const;
virtual int computeReplacedLogicalWidth(bool includeMaxWidth = true) const;
virtual int computeReplacedLogicalHeight() const;
int computePercentageLogicalHeight(const Length& height);
// Block flows subclass availableWidth to handle multi column layout (shrinking the width available to children when laying out.)
virtual int availableLogicalWidth() const { return contentLogicalWidth(); }
int availableLogicalHeight() const;
int availableLogicalHeightUsing(const Length&) const;
// There are a few cases where we need to refer specifically to the available physical width and available physical height.
// Relative positioning is one of those cases, since left/top offsets are physical.
int availableWidth() const { return style()->isHorizontalWritingMode() ? availableLogicalWidth() : availableLogicalHeight(); }
int availableHeight() const { return style()->isHorizontalWritingMode() ? availableLogicalHeight() : availableLogicalWidth(); }
virtual int verticalScrollbarWidth() const;
int horizontalScrollbarHeight() const;
int scrollbarLogicalHeight() const { return style()->isHorizontalWritingMode() ? horizontalScrollbarHeight() : verticalScrollbarWidth(); }
virtual bool scroll(ScrollDirection, ScrollGranularity, float multiplier = 1, Node** stopNode = 0);
virtual bool logicalScroll(ScrollLogicalDirection, ScrollGranularity, float multiplier = 1, Node** stopNode = 0);
bool canBeScrolledAndHasScrollableArea() const;
virtual bool canBeProgramaticallyScrolled(bool) const;
virtual void autoscroll();
virtual void stopAutoscroll() { }
virtual void panScroll(const IntPoint&);
bool hasAutoVerticalScrollbar() const { return hasOverflowClip() && (style()->overflowY() == OAUTO || style()->overflowY() == OOVERLAY); }
bool hasAutoHorizontalScrollbar() const { return hasOverflowClip() && (style()->overflowX() == OAUTO || style()->overflowX() == OOVERLAY); }
bool scrollsOverflow() const { return scrollsOverflowX() || scrollsOverflowY(); }
bool scrollsOverflowX() const { return hasOverflowClip() && (style()->overflowX() == OSCROLL || hasAutoHorizontalScrollbar()); }
bool scrollsOverflowY() const { return hasOverflowClip() && (style()->overflowY() == OSCROLL || hasAutoVerticalScrollbar()); }
virtual IntRect localCaretRect(InlineBox*, int caretOffset, int* extraWidthToEndOfLine = 0);
virtual IntRect overflowClipRect(int tx, int ty, OverlayScrollbarSizeRelevancy relevancy = IgnoreOverlayScrollbarSize);
IntRect clipRect(int tx, int ty);
virtual bool hasControlClip() const { return false; }
virtual IntRect controlClipRect(int /*tx*/, int /*ty*/) const { return IntRect(); }
bool pushContentsClip(PaintInfo&, int tx, int ty);
void popContentsClip(PaintInfo&, PaintPhase originalPhase, int tx, int ty);
virtual void paintObject(PaintInfo&, int /*tx*/, int /*ty*/) { ASSERT_NOT_REACHED(); }
virtual void paintBoxDecorations(PaintInfo&, int tx, int ty);
virtual void paintMask(PaintInfo&, int tx, int ty);
virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
// Called when a positioned object moves but doesn't necessarily change size. A simplified layout is attempted
// that just updates the object's position. If the size does change, the object remains dirty.
bool tryLayoutDoingPositionedMovementOnly()
{
int oldWidth = width();
computeLogicalWidth();
// If we shrink to fit our width may have changed, so we still need full layout.
if (oldWidth != width())
return false;
computeLogicalHeight();
return true;
}
IntRect maskClipRect();
virtual VisiblePosition positionForPoint(const IntPoint&);
void removeFloatingOrPositionedChildFromBlockLists();
RenderLayer* enclosingFloatPaintingLayer() const;
virtual int firstLineBoxBaseline() const { return -1; }
virtual int lastLineBoxBaseline() const { return -1; }
bool shrinkToAvoidFloats() const;
virtual bool avoidsFloats() const;
virtual void markForPaginationRelayoutIfNeeded() { }
bool isWritingModeRoot() const { return !parent() || parent()->style()->writingMode() != style()->writingMode(); }
bool isDeprecatedFlexItem() const { return !isInline() && !isFloatingOrPositioned() && parent() && parent()->isFlexibleBox(); }
virtual int lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const;
virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const;
enum FlippingAdjustment { ChildToParentFlippingAdjustment, ParentToChildFlippingAdjustment };
IntPoint flipForWritingMode(const RenderBox* child, const IntPoint&, FlippingAdjustment) const;
int flipForWritingMode(int position) const; // The offset is in the block direction (y for horizontal writing modes, x for vertical writing modes).
IntPoint flipForWritingMode(const IntPoint&) const;
IntPoint flipForWritingModeIncludingColumns(const IntPoint&) const;
IntSize flipForWritingMode(const IntSize&) const;
void flipForWritingMode(IntRect&) const;
FloatPoint flipForWritingMode(const FloatPoint&) const;
void flipForWritingMode(FloatRect&) const;
IntSize locationOffsetIncludingFlipping() const;
IntRect logicalVisualOverflowRectForPropagation(RenderStyle*) const;
IntRect visualOverflowRectForPropagation(RenderStyle*) const;
IntRect logicalLayoutOverflowRectForPropagation(RenderStyle*) const;
IntRect layoutOverflowRectForPropagation(RenderStyle*) const;
RenderOverflow* hasRenderOverflow() const { return m_overflow.get(); }
#ifdef ANDROID_LAYOUT
int getVisibleWidth() const { return m_visibleWidth; }
#endif
protected:
virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
virtual void updateBoxModelInfoFromStyle();
void paintFillLayer(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int width, int height, CompositeOperator op, RenderObject* backgroundObject);
void paintFillLayers(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int width, int height, CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0);
void paintBoxDecorationsWithSize(PaintInfo&, int tx, int ty, int width, int height);
void paintMaskImages(const PaintInfo&, int tx, int ty, int width, int height);
#if PLATFORM(MAC)
void paintCustomHighlight(int tx, int ty, const AtomicString& type, bool behindText);
#endif
void computePositionedLogicalWidth();
virtual bool shouldComputeSizeAsReplaced() const { return isReplaced() && !isInlineBlockOrInlineTable(); }
virtual void mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState&) const;
virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const;
void paintRootBoxFillLayers(const PaintInfo&);
private:
bool includeVerticalScrollbarSize() const;
bool includeHorizontalScrollbarSize() const;
// Returns true if we did a full repaint
bool repaintLayerRectsForImage(WrappedImagePtr image, const FillLayer* layers, bool drawingBackground);
int containingBlockLogicalWidthForPositioned(const RenderBoxModelObject* containingBlock, bool checkForPerpendicularWritingMode = true) const;
int containingBlockLogicalHeightForPositioned(const RenderBoxModelObject* containingBlock, bool checkForPerpendicularWritingMode = true) const;
void computePositionedLogicalHeight();
void computePositionedLogicalWidthUsing(Length logicalWidth, const RenderBoxModelObject* containerBlock, TextDirection containerDirection,
int containerLogicalWidth, int bordersPlusPadding,
Length logicalLeft, Length logicalRight, Length marginLogicalLeft, Length marginLogicalRight,
int& logicalWidthValue, int& marginLogicalLeftValue, int& marginLogicalRightValue, int& logicalLeftPos);
void computePositionedLogicalHeightUsing(Length logicalHeight, const RenderBoxModelObject* containerBlock,
int containerLogicalHeight, int bordersPlusPadding,
Length logicalTop, Length logicalBottom, Length marginLogicalTop, Length marginLogicalBottom,
int& logicalHeightValue, int& marginLogicalTopValue, int& marginLogicalBottomValue, int& logicalTopPos);
void computePositionedLogicalHeightReplaced();
void computePositionedLogicalWidthReplaced();
// This function calculates the minimum and maximum preferred widths for an object.
// These values are used in shrink-to-fit layout systems.
// These include tables, positioned objects, floats and flexible boxes.
virtual void computePreferredLogicalWidths() { setPreferredLogicalWidthsDirty(false); }
private:
// The width/height of the contents + borders + padding. The x/y location is relative to our container (which is not always our parent).
IntRect m_frameRect;
protected:
#ifdef ANDROID_LAYOUT
void setVisibleWidth(int newWidth);
bool checkAndSetRelayoutChildren(bool* relayoutChildren);
#endif
int m_marginLeft;
int m_marginRight;
int m_marginTop;
int m_marginBottom;
// The preferred logical width of the element if it were to break its lines at every possible opportunity.
int m_minPreferredLogicalWidth;
// The preferred logical width of the element if it never breaks any lines at all.
int m_maxPreferredLogicalWidth;
// For inline replaced elements, the inline box that owns us.
InlineBox* m_inlineBoxWrapper;
// Our overflow information.
OwnPtr<RenderOverflow> m_overflow;
private:
// Used to store state between styleWillChange and styleDidChange
static bool s_hadOverflowClip;
#ifdef ANDROID_LAYOUT
int m_visibleWidth;
bool m_isVisibleWidthChangedBeforeLayout;
#endif
};
inline RenderBox* toRenderBox(RenderObject* object)
{
ASSERT(!object || object->isBox());
return static_cast<RenderBox*>(object);
}
inline const RenderBox* toRenderBox(const RenderObject* object)
{
ASSERT(!object || object->isBox());
return static_cast<const RenderBox*>(object);
}
// This will catch anyone doing an unnecessary cast.
void toRenderBox(const RenderBox*);
inline RenderBox* RenderBox::previousSiblingBox() const
{
return toRenderBox(previousSibling());
}
inline RenderBox* RenderBox::nextSiblingBox() const
{
return toRenderBox(nextSibling());
}
inline RenderBox* RenderBox::parentBox() const
{
return toRenderBox(parent());
}
inline RenderBox* RenderBox::firstChildBox() const
{
return toRenderBox(firstChild());
}
inline RenderBox* RenderBox::lastChildBox() const
{
return toRenderBox(lastChild());
}
} // namespace WebCore
#endif // RenderBox_h