Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 566 insertions, 0 deletions

diff --git a/Source/WebCore/rendering/RenderBox.h b/Source/WebCore/rendering/RenderBox.h
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+++ b/Source/WebCore/rendering/RenderBox.h
@@ -0,0 +1,566 @@
+/*
+ * 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 {
+
+class RenderBoxRegionInfo;
+class RenderRegion;
+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;
+
+    LayoutUnit x() const { return m_frameRect.x(); }
+    LayoutUnit y() const { return m_frameRect.y(); }
+    LayoutUnit width() const { return m_frameRect.width(); }
+    LayoutUnit height() const { return m_frameRect.height(); }
+
+    // These represent your location relative to your container as a physical offset.
+    // In layout related methods you almost always want the logical location (e.g. x() and y()).
+    LayoutUnit top() const { return topLeftLocation().y(); }
+    LayoutUnit left() const { return topLeftLocation().x(); }
+
+    void setX(LayoutUnit x) { m_frameRect.setX(x); }
+    void setY(LayoutUnit y) { m_frameRect.setY(y); }
+    void setWidth(LayoutUnit width) { m_frameRect.setWidth(width); }
+    void setHeight(LayoutUnit height) { m_frameRect.setHeight(height); }
+
+    LayoutUnit logicalLeft() const { return style()->isHorizontalWritingMode() ? x() : y(); }
+    LayoutUnit logicalRight() const { return logicalLeft() + logicalWidth(); }
+    LayoutUnit logicalTop() const { return style()->isHorizontalWritingMode() ? y() : x(); }
+    LayoutUnit logicalBottom() const { return logicalTop() + logicalHeight(); }
+    LayoutUnit logicalWidth() const { return style()->isHorizontalWritingMode() ? width() : height(); }
+    LayoutUnit logicalHeight() const { return style()->isHorizontalWritingMode() ? height() : width(); }
+
+    void setLogicalLeft(LayoutUnit left)
+    {
+        if (style()->isHorizontalWritingMode())
+            setX(left);
+        else
+            setY(left);
+    }
+    void setLogicalTop(LayoutUnit top)
+    {
+        if (style()->isHorizontalWritingMode())
+            setY(top);
+        else
+            setX(top);
+    }
+    void setLogicalLocation(const LayoutPoint& location)
+    {
+        if (style()->isHorizontalWritingMode())
+            setLocation(location);
+        else
+            setLocation(location.transposedPoint());
+    }
+    void setLogicalWidth(LayoutUnit size)
+    {
+        if (style()->isHorizontalWritingMode())
+            setWidth(size);
+        else
+            setHeight(size);
+    }
+    void setLogicalHeight(LayoutUnit size)
+    {
+        if (style()->isHorizontalWritingMode())
+            setHeight(size);
+        else
+            setWidth(size);
+    }
+    void setLogicalSize(const LayoutSize& size)
+    {
+        if (style()->isHorizontalWritingMode())
+            setSize(size);
+        else
+            setSize(size.transposedSize());
+    }
+
+    LayoutPoint location() const { return m_frameRect.location(); }
+    LayoutSize locationOffset() const { return LayoutSize(x(), y()); }
+    LayoutSize size() const { return m_frameRect.size(); }
+
+    void setLocation(const LayoutPoint& location) { m_frameRect.setLocation(location); }
+    
+    void setSize(const LayoutSize& size) { m_frameRect.setSize(size); }
+    void move(LayoutUnit dx, LayoutUnit dy) { m_frameRect.move(dx, dy); }
+
+    LayoutRect frameRect() const { return m_frameRect; }
+    void setFrameRect(const LayoutRect& rect) { m_frameRect = rect; }
+
+    LayoutRect borderBoxRect() const { return LayoutRect(0, 0, width(), height()); }
+    virtual LayoutRect borderBoundingBox() const { return borderBoxRect(); } 
+
+    // The content area of the box (excludes padding and border).
+    LayoutRect contentBoxRect() const { return LayoutRect(borderLeft() + paddingLeft(), borderTop() + paddingTop(), contentWidth(), contentHeight()); }
+    // The content box in absolute coords. Ignores transforms.
+    LayoutRect 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 LayoutRect outlineBoundsForRepaint(RenderBoxModelObject* /*repaintContainer*/, LayoutPoint* cachedOffsetToRepaintContainer) const;
+    virtual void addFocusRingRects(Vector<LayoutRect>&, const LayoutPoint&);
+
+    // 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.
+    LayoutRect layoutOverflowRect() const { return m_overflow ? m_overflow->layoutOverflowRect() : clientBoxRect(); }
+    LayoutUnit minYLayoutOverflow() const { return m_overflow? m_overflow->minYLayoutOverflow() : borderTop(); }
+    LayoutUnit maxYLayoutOverflow() const { return m_overflow ? m_overflow->maxYLayoutOverflow() : borderTop() + clientHeight(); }
+    LayoutUnit minXLayoutOverflow() const { return m_overflow ? m_overflow->minXLayoutOverflow() : borderLeft(); }
+    LayoutUnit maxXLayoutOverflow() const { return m_overflow ? m_overflow->maxXLayoutOverflow() : borderLeft() + clientWidth(); }
+    LayoutSize maxLayoutOverflow() const { return LayoutSize(maxXLayoutOverflow(), maxYLayoutOverflow()); }
+    LayoutUnit logicalLeftLayoutOverflow() const { return style()->isHorizontalWritingMode() ? minXLayoutOverflow() : minYLayoutOverflow(); }
+    LayoutUnit logicalRightLayoutOverflow() const { return style()->isHorizontalWritingMode() ? maxXLayoutOverflow() : maxYLayoutOverflow(); }
+    
+    virtual LayoutRect visualOverflowRect() const { return m_overflow ? m_overflow->visualOverflowRect() : borderBoxRect(); }
+    LayoutUnit minYVisualOverflow() const { return m_overflow? m_overflow->minYVisualOverflow() : 0; }
+    LayoutUnit maxYVisualOverflow() const { return m_overflow ? m_overflow->maxYVisualOverflow() : height(); }
+    LayoutUnit minXVisualOverflow() const { return m_overflow ? m_overflow->minXVisualOverflow() : 0; }
+    LayoutUnit maxXVisualOverflow() const { return m_overflow ? m_overflow->maxXVisualOverflow() : width(); }
+    LayoutUnit logicalLeftVisualOverflow() const { return style()->isHorizontalWritingMode() ? minXVisualOverflow() : minYVisualOverflow(); }
+    LayoutUnit logicalRightVisualOverflow() const { return style()->isHorizontalWritingMode() ? maxXVisualOverflow() : maxYVisualOverflow(); }
+    
+    void addLayoutOverflow(const LayoutRect&);
+    void addVisualOverflow(const LayoutRect&);
+    
+    void addVisualEffectOverflow();
+    void addOverflowFromChild(RenderBox* child) { addOverflowFromChild(child, child->locationOffset()); }
+    void addOverflowFromChild(RenderBox* child, const LayoutSize& delta);
+    void clearLayoutOverflow();
+    
+    void updateLayerTransform();
+
+    LayoutUnit contentWidth() const { return clientWidth() - paddingLeft() - paddingRight(); }
+    LayoutUnit contentHeight() const { return clientHeight() - paddingTop() - paddingBottom(); }
+    LayoutUnit contentLogicalWidth() const { return style()->isHorizontalWritingMode() ? contentWidth() : contentHeight(); }
+    LayoutUnit 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 LayoutUnit offsetWidth() const { return width(); }
+    virtual LayoutUnit 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.
+    LayoutUnit clientLeft() const { return borderLeft(); }
+    LayoutUnit clientTop() const { return borderTop(); }
+    LayoutUnit clientWidth() const;
+    LayoutUnit clientHeight() const;
+    LayoutUnit clientLogicalWidth() const { return style()->isHorizontalWritingMode() ? clientWidth() : clientHeight(); }
+    LayoutUnit clientLogicalHeight() const { return style()->isHorizontalWritingMode() ? clientHeight() : clientWidth(); }
+    LayoutUnit clientLogicalBottom() const { return borderBefore() + clientLogicalHeight(); }
+    LayoutRect clientBoxRect() const { return LayoutRect(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 LayoutUnit marginTop() const { return m_marginTop; }
+    virtual LayoutUnit marginBottom() const { return m_marginBottom; }
+    virtual LayoutUnit marginLeft() const { return m_marginLeft; }
+    virtual LayoutUnit marginRight() const { return m_marginRight; }
+    void setMarginTop(LayoutUnit margin) { m_marginTop = margin; }
+    void setMarginBottom(LayoutUnit margin) { m_marginBottom = margin; }
+    void setMarginLeft(LayoutUnit margin) { m_marginLeft = margin; }
+    void setMarginRight(LayoutUnit margin) { m_marginRight = margin; }
+    virtual LayoutUnit marginBefore() const;
+    virtual LayoutUnit marginAfter() const;
+    virtual LayoutUnit marginStart() const;
+    virtual LayoutUnit marginEnd() const;
+    void setMarginStart(LayoutUnit);
+    void setMarginEnd(LayoutUnit);
+    void setMarginBefore(LayoutUnit);
+    void setMarginAfter(LayoutUnit);
+
+    // 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 LayoutUnit collapsedMarginBefore() const { return marginBefore(); }
+    virtual LayoutUnit collapsedMarginAfter() const { return marginAfter(); }
+
+    virtual void absoluteRects(Vector<LayoutRect>&, const LayoutPoint& accumulatedOffset) const;
+    virtual void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const;
+    
+    LayoutRect reflectionBox() const;
+    int reflectionOffset() const;
+    // Given a rect in the object's coordinate space, returns the corresponding rect in the reflection.
+    LayoutRect reflectedRect(const LayoutRect&) const;
+
+    virtual void layout();
+    virtual void paint(PaintInfo&, const LayoutPoint&);
+    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset, HitTestAction);
+
+    virtual LayoutUnit minPreferredLogicalWidth() const;
+    virtual LayoutUnit maxPreferredLogicalWidth() const;
+
+    LayoutUnit overrideWidth() const;
+    LayoutUnit overrideHeight() const;
+    bool hasOverrideHeight() const;
+    bool hasOverrideWidth() const;
+    void setOverrideHeight(LayoutUnit);
+    void setOverrideWidth(LayoutUnit);
+    void clearOverrideSize();
+
+    virtual LayoutSize offsetFromContainer(RenderObject*, const LayoutPoint&) const;
+    
+    LayoutUnit computeBorderBoxLogicalWidth(LayoutUnit width) const;
+    LayoutUnit computeBorderBoxLogicalHeight(LayoutUnit height) const;
+    LayoutUnit computeContentBoxLogicalWidth(LayoutUnit width) const;
+    LayoutUnit computeContentBoxLogicalHeight(LayoutUnit height) const;
+
+    virtual void borderFitAdjust(LayoutRect&) 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, LayoutUnit containerWidth, LayoutUnit childWidth);
+
+    // Used to resolve margins in the containing block's block-flow direction.
+    void computeBlockDirectionMargins(RenderBlock* containingBlock);
+
+    enum RenderBoxRegionInfoFlags { CacheRenderBoxRegionInfo, DoNotCacheRenderBoxRegionInfo };
+    LayoutRect borderBoxRectInRegion(RenderRegion*, LayoutUnit offsetFromLogicalTopOfFirstPage = 0, RenderBoxRegionInfoFlags = CacheRenderBoxRegionInfo) const;
+    void clearRenderBoxRegionInfo();
+    
+    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 LayoutRect clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer) const;
+    virtual void computeRectForRepaint(RenderBoxModelObject* repaintContainer, LayoutRect&, bool fixed = false) const;
+
+    virtual void repaintDuringLayoutIfMoved(const LayoutRect&);
+
+    virtual LayoutUnit containingBlockLogicalWidthForContent() const;
+    LayoutUnit containingBlockLogicalWidthForContentInRegion(RenderRegion*, LayoutUnit offsetFromLogicalTopOfFirstPage) const;
+    LayoutUnit perpendicularContainingBlockLogicalHeight() const;
+    
+    virtual void computeLogicalWidth();
+    virtual void computeLogicalHeight();
+
+    RenderBoxRegionInfo* renderBoxRegionInfo(RenderRegion*, LayoutUnit offsetFromLogicalTopOfFirstPage, RenderBoxRegionInfoFlags = CacheRenderBoxRegionInfo) const;
+    void computeLogicalWidthInRegion(RenderRegion* = 0, LayoutUnit offsetFromLogicalTopOfFirstPage = 0);
+
+    bool stretchesToViewport() const
+    {
+        return document()->inQuirksMode() && style()->logicalHeight().isAuto() && !isFloatingOrPositioned() && (isRoot() || isBody());
+    }
+
+    virtual LayoutSize intrinsicSize() const { return LayoutSize(); }
+    LayoutUnit intrinsicLogicalWidth() const { return style()->isHorizontalWritingMode() ? intrinsicSize().width() : intrinsicSize().height(); }
+    LayoutUnit 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; }
+
+    LayoutUnit computeLogicalWidthUsing(LogicalWidthType, LayoutUnit availableLogicalWidth);
+    LayoutUnit computeLogicalHeightUsing(const Length& height);
+    LayoutUnit computeReplacedLogicalWidthUsing(Length width) const;
+    LayoutUnit computeReplacedLogicalWidthRespectingMinMaxWidth(LayoutUnit logicalWidth, bool includeMaxWidth = true) const;
+    LayoutUnit computeReplacedLogicalHeightUsing(Length height) const;
+    LayoutUnit computeReplacedLogicalHeightRespectingMinMaxHeight(LayoutUnit logicalHeight) const;
+
+    virtual LayoutUnit computeReplacedLogicalWidth(bool includeMaxWidth = true) const;
+    virtual LayoutUnit computeReplacedLogicalHeight() const;
+
+    LayoutUnit computePercentageLogicalHeight(const Length& height);
+
+    // Block flows subclass availableWidth to handle multi column layout (shrinking the width available to children when laying out.)
+    virtual LayoutUnit availableLogicalWidth() const { return contentLogicalWidth(); }
+    LayoutUnit availableLogicalHeight() const;
+    LayoutUnit 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.
+    LayoutUnit availableWidth() const { return style()->isHorizontalWritingMode() ? availableLogicalWidth() : availableLogicalHeight(); }
+    LayoutUnit 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() 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()); }
+    
+    bool hasUnsplittableScrollingOverflow() const;
+    bool isUnsplittableForPagination() const;
+
+    virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0);
+
+    virtual LayoutRect overflowClipRect(const LayoutPoint& location, RenderRegion*, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize);
+    LayoutRect clipRect(const LayoutPoint& location, RenderRegion*);
+    virtual bool hasControlClip() const { return false; }
+    virtual LayoutRect controlClipRect(const LayoutPoint&) const { return LayoutRect(); }
+    bool pushContentsClip(PaintInfo&, const LayoutPoint& accumulatedOffset);
+    void popContentsClip(PaintInfo&, PaintPhase originalPhase, const LayoutPoint& accumulatedOffset);
+
+    virtual void paintObject(PaintInfo&, const LayoutPoint&) { ASSERT_NOT_REACHED(); }
+    virtual void paintBoxDecorations(PaintInfo&, const LayoutPoint&);
+    virtual void paintMask(PaintInfo&, const LayoutPoint&);
+    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()
+    {
+        LayoutUnit 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;
+    }
+
+    LayoutRect maskClipRect();
+
+    virtual VisiblePosition positionForPoint(const LayoutPoint&);
+
+    void removeFloatingOrPositionedChildFromBlockLists();
+    
+    RenderLayer* enclosingFloatPaintingLayer() const;
+    
+    virtual LayoutUnit firstLineBoxBaseline() const { return -1; }
+    virtual LayoutUnit 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()->isDeprecatedFlexibleBox(); }
+    
+    virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const;
+    virtual LayoutUnit baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const;
+
+    LayoutPoint flipForWritingModeForChild(const RenderBox* child, const LayoutPoint&) 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;
+    LayoutPoint flipForWritingModeIncludingColumns(const LayoutPoint&) const;
+    IntSize flipForWritingMode(const IntSize&) const;
+    void flipForWritingMode(IntRect&) const;
+    FloatPoint flipForWritingMode(const FloatPoint&) const;
+    void flipForWritingMode(FloatRect&) const;
+    // These represent your location relative to your container as a physical offset.
+    // In layout related methods you almost always want the logical location (e.g. x() and y()).
+    LayoutPoint topLeftLocation() const;
+    LayoutSize topLeftLocationOffset() const;
+
+    LayoutRect logicalVisualOverflowRectForPropagation(RenderStyle*) const;
+    LayoutRect visualOverflowRectForPropagation(RenderStyle*) const;
+    LayoutRect logicalLayoutOverflowRectForPropagation(RenderStyle*) const;
+    LayoutRect layoutOverflowRectForPropagation(RenderStyle*) const;
+
+    RenderOverflow* hasRenderOverflow() const { return m_overflow.get(); }    
+    bool hasVisualOverflow() const { return m_overflow && !borderBoxRect().contains(m_overflow->visualOverflowRect()); }
+
+    virtual bool needsPreferredWidthsRecalculation() const;
+    virtual void computeIntrinsicRatioInformation(FloatSize& /* intrinsicRatio */, bool& /* isPercentageIntrinsicSize */) const { }
+
+protected:
+    virtual void willBeDestroyed();
+
+    virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle);
+    virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle);
+    virtual void updateBoxModelInfoFromStyle();
+
+    virtual bool backgroundIsObscured() const { return false; }
+    void paintBackground(const PaintInfo&, const LayoutRect&, BackgroundBleedAvoidance = BackgroundBleedNone);
+    
+    void paintFillLayer(const PaintInfo&, const Color&, const FillLayer*, const LayoutRect&, BackgroundBleedAvoidance, CompositeOperator, RenderObject* backgroundObject);
+    void paintFillLayers(const PaintInfo&, const Color&, const FillLayer*, const LayoutRect&, BackgroundBleedAvoidance = BackgroundBleedNone, CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0);
+
+    void paintMaskImages(const PaintInfo&, const LayoutRect&);
+
+#if PLATFORM(MAC)
+    void paintCustomHighlight(const LayoutPoint&, const AtomicString& type, bool behindText);
+#endif
+
+    void computePositionedLogicalWidth(RenderRegion* = 0, LayoutUnit offsetFromLogicalTopOfFirstPage = 0);
+    
+    virtual bool shouldComputeSizeAsReplaced() const { return isReplaced() && !isInlineBlockOrInlineTable(); }
+
+    virtual void mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState&, bool* wasFixed = 0) const;
+    virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const;
+
+    void paintRootBoxFillLayers(const PaintInfo&);
+
+private:
+    bool shouldLayoutFixedElementRelativeToFrame(Frame*, FrameView*) const;
+
+    bool includeVerticalScrollbarSize() const;
+    bool includeHorizontalScrollbarSize() const;
+
+    // Returns true if we did a full repaint
+    bool repaintLayerRectsForImage(WrappedImagePtr image, const FillLayer* layers, bool drawingBackground);
+   
+    LayoutUnit containingBlockLogicalWidthForPositioned(const RenderBoxModelObject* containingBlock, RenderRegion* = 0,
+        LayoutUnit offsetFromLogicalTopOfFirstPage = 0, bool checkForPerpendicularWritingMode = true) const;
+    LayoutUnit containingBlockLogicalHeightForPositioned(const RenderBoxModelObject* containingBlock, bool checkForPerpendicularWritingMode = true) const;
+
+    void computePositionedLogicalHeight();
+    void computePositionedLogicalWidthUsing(Length logicalWidth, const RenderBoxModelObject* containerBlock, TextDirection containerDirection,
+                                            LayoutUnit containerLogicalWidth, LayoutUnit bordersPlusPadding,
+                                            Length logicalLeft, Length logicalRight, Length marginLogicalLeft, Length marginLogicalRight,
+                                            LayoutUnit& logicalWidthValue, LayoutUnit& marginLogicalLeftValue, LayoutUnit& marginLogicalRightValue, LayoutUnit& logicalLeftPos);
+    void computePositionedLogicalHeightUsing(Length logicalHeight, const RenderBoxModelObject* containerBlock,
+                                             LayoutUnit containerLogicalHeight, LayoutUnit bordersPlusPadding,
+                                             Length logicalTop, Length logicalBottom, Length marginLogicalTop, Length marginLogicalBottom,
+                                             LayoutUnit& logicalHeightValue, LayoutUnit& marginLogicalTopValue, LayoutUnit& marginLogicalBottomValue, LayoutUnit& 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); }
+
+    BackgroundBleedAvoidance determineBackgroundBleedAvoidance(GraphicsContext*) const;
+
+private:
+    // The width/height of the contents + borders + padding.  The x/y location is relative to our container (which is not always our parent).
+    LayoutRect m_frameRect;
+
+protected:
+    LayoutUnit m_marginLeft;
+    LayoutUnit m_marginRight;
+    LayoutUnit m_marginTop;
+    LayoutUnit m_marginBottom;
+
+    // The preferred logical width of the element if it were to break its lines at every possible opportunity.
+    LayoutUnit m_minPreferredLogicalWidth;
+    
+    // The preferred logical width of the element if it never breaks any lines at all.
+    LayoutUnit 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;
+};
+
+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