/* * 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" #if ENABLE(CSS_SHAPES) #include "ShapeOutsideInfo.h" #endif namespace WebCore { class RenderBoxRegionInfo; class RenderRegion; struct PaintInfo; enum SizeType { MainOrPreferredSize, MinSize, MaxSize }; enum AvailableLogicalHeightType { ExcludeMarginBorderPadding, IncludeMarginBorderPadding }; enum OverlayScrollbarSizeRelevancy { IgnoreOverlayScrollbarSize, IncludeOverlayScrollbarSize }; enum ShouldComputePreferred { ComputeActual, ComputePreferred }; class RenderBox : public RenderBoxModelObject { public: explicit RenderBox(ContainerNode*); virtual ~RenderBox(); // hasAutoZIndex only returns true if the element is positioned or a flex-item since // position:static elements that are not flex-items get their z-index coerced to auto. virtual bool requiresLayer() const OVERRIDE { return isRoot() || isPositioned() || createsGroup() || hasClipPath() || hasOverflowClip() || hasTransform() || hasHiddenBackface() || hasReflection() || style()->specifiesColumns() || !style()->hasAutoZIndex() || isFloatingWithShapeOutside(); } virtual bool backgroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect) const OVERRIDE; // 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(); } int pixelSnappedWidth() const { return m_frameRect.pixelSnappedWidth(); } int pixelSnappedHeight() const { return m_frameRect.pixelSnappedHeight(); } // 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(); } LayoutUnit constrainLogicalWidthInRegionByMinMax(LayoutUnit, LayoutUnit, RenderBlock*, RenderRegion* = 0) const; LayoutUnit constrainLogicalHeightByMinMax(LayoutUnit) const; LayoutUnit constrainContentBoxLogicalHeightByMinMax(LayoutUnit) const; int pixelSnappedLogicalHeight() const { return style()->isHorizontalWritingMode() ? pixelSnappedHeight() : pixelSnappedWidth(); } int pixelSnappedLogicalWidth() const { return style()->isHorizontalWritingMode() ? pixelSnappedWidth() : pixelSnappedHeight(); } 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(); } IntSize pixelSnappedSize() const { return m_frameRect.pixelSnappedSize(); } 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; } IntRect pixelSnappedFrameRect() const { return pixelSnappedIntRect(m_frameRect); } void setFrameRect(const LayoutRect& rect) { m_frameRect = rect; } LayoutRect borderBoxRect() const { return LayoutRect(LayoutPoint(), size()); } LayoutRect paddingBoxRect() const { return LayoutRect(borderLeft(), borderTop(), contentWidth() + paddingLeft() + paddingRight(), contentHeight() + paddingTop() + paddingBottom()); } IntRect pixelSnappedBorderBoxRect() const { return IntRect(IntPoint(), m_frameRect.pixelSnappedSize()); } virtual IntRect borderBoundingBox() const { return pixelSnappedBorderBoxRect(); } // The content area of the box (excludes padding - and intrinsic padding for table cells, etc... - and border). LayoutRect contentBoxRect() const { return LayoutRect(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; // This returns the content area of the box (excluding padding and border). The only difference with contentBoxRect is that computedCSSContentBoxRect // does include the intrinsic padding in the content box as this is what some callers expect (like getComputedStyle). LayoutRect computedCSSContentBoxRect() const { return LayoutRect(borderLeft() + computedCSSPaddingLeft(), borderTop() + computedCSSPaddingTop(), clientWidth() - computedCSSPaddingLeft() - computedCSSPaddingRight(), clientHeight() - computedCSSPaddingTop() - computedCSSPaddingBottom()); } // Bounds of the outline box in absolute coords. Respects transforms virtual LayoutRect outlineBoundsForRepaint(const RenderLayerModelObject* /*repaintContainer*/, const RenderGeometryMap*) const OVERRIDE; virtual void addFocusRingRects(Vector&, const LayoutPoint& additionalOffset, const RenderLayerModelObject* paintContainer = 0) OVERRIDE; // 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 logicalLeftLayoutOverflow() const { return style()->isHorizontalWritingMode() ? layoutOverflowRect().x() : layoutOverflowRect().y(); } LayoutUnit logicalRightLayoutOverflow() const { return style()->isHorizontalWritingMode() ? layoutOverflowRect().maxX() : layoutOverflowRect().maxY(); } virtual LayoutRect visualOverflowRect() const { return m_overflow ? m_overflow->visualOverflowRect() : borderBoxRect(); } LayoutUnit logicalLeftVisualOverflow() const { return style()->isHorizontalWritingMode() ? visualOverflowRect().x() : visualOverflowRect().y(); } LayoutUnit logicalRightVisualOverflow() const { return style()->isHorizontalWritingMode() ? visualOverflowRect().maxX() : visualOverflowRect().maxY(); } LayoutRect overflowRectForPaintRejection() const; 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 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(); } virtual int pixelSnappedOffsetWidth() const OVERRIDE; virtual int pixelSnappedOffsetHeight() const OVERRIDE; // 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()); } int pixelSnappedClientWidth() const; int pixelSnappedClientHeight() const; // 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 OVERRIDE { return m_marginBox.top(); } virtual LayoutUnit marginBottom() const OVERRIDE { return m_marginBox.bottom(); } virtual LayoutUnit marginLeft() const OVERRIDE { return m_marginBox.left(); } virtual LayoutUnit marginRight() const OVERRIDE { return m_marginBox.right(); } void setMarginTop(LayoutUnit margin) { m_marginBox.setTop(margin); } void setMarginBottom(LayoutUnit margin) { m_marginBox.setBottom(margin); } void setMarginLeft(LayoutUnit margin) { m_marginBox.setLeft(margin); } void setMarginRight(LayoutUnit margin) { m_marginBox.setRight(margin); } virtual LayoutUnit marginLogicalLeft() const { return m_marginBox.logicalLeft(style()->writingMode()); } virtual LayoutUnit marginLogicalRight() const { return m_marginBox.logicalRight(style()->writingMode()); } virtual LayoutUnit marginBefore(const RenderStyle* overrideStyle = 0) const OVERRIDE { return m_marginBox.before((overrideStyle ? overrideStyle : style())->writingMode()); } virtual LayoutUnit marginAfter(const RenderStyle* overrideStyle = 0) const OVERRIDE { return m_marginBox.after((overrideStyle ? overrideStyle : style())->writingMode()); } virtual LayoutUnit marginStart(const RenderStyle* overrideStyle = 0) const OVERRIDE { const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style(); return m_marginBox.start(styleToUse->writingMode(), styleToUse->direction()); } virtual LayoutUnit marginEnd(const RenderStyle* overrideStyle = 0) const OVERRIDE { const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style(); return m_marginBox.end(styleToUse->writingMode(), styleToUse->direction()); } void setMarginBefore(LayoutUnit value, const RenderStyle* overrideStyle = 0) { m_marginBox.setBefore((overrideStyle ? overrideStyle : style())->writingMode(), value); } void setMarginAfter(LayoutUnit value, const RenderStyle* overrideStyle = 0) { m_marginBox.setAfter((overrideStyle ? overrideStyle : style())->writingMode(), value); } void setMarginStart(LayoutUnit value, const RenderStyle* overrideStyle = 0) { const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style(); m_marginBox.setStart(styleToUse->writingMode(), styleToUse->direction(), value); } void setMarginEnd(LayoutUnit value, const RenderStyle* overrideStyle = 0) { const RenderStyle* styleToUse = overrideStyle ? overrideStyle : style(); m_marginBox.setEnd(styleToUse->writingMode(), styleToUse->direction(), value); } // 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&, const LayoutPoint& accumulatedOffset) const; virtual void absoluteQuads(Vector&, 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 HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; virtual LayoutUnit minPreferredLogicalWidth() const; virtual LayoutUnit maxPreferredLogicalWidth() const; // FIXME: We should rename these back to overrideLogicalHeight/Width and have them store // the border-box height/width like the regular height/width accessors on RenderBox. // Right now, these are different than contentHeight/contentWidth because they still // include the scrollbar height/width. LayoutUnit overrideLogicalContentWidth() const; LayoutUnit overrideLogicalContentHeight() const; bool hasOverrideHeight() const; bool hasOverrideWidth() const; void setOverrideLogicalContentHeight(LayoutUnit); void setOverrideLogicalContentWidth(LayoutUnit); void clearOverrideSize(); void clearOverrideLogicalContentHeight(); void clearOverrideLogicalContentWidth(); LayoutUnit overrideContainingBlockContentLogicalWidth() const; LayoutUnit overrideContainingBlockContentLogicalHeight() const; bool hasOverrideContainingBlockLogicalWidth() const; bool hasOverrideContainingBlockLogicalHeight() const; void setOverrideContainingBlockContentLogicalWidth(LayoutUnit); void setOverrideContainingBlockContentLogicalHeight(LayoutUnit); void clearContainingBlockOverrideSize(); void clearOverrideContainingBlockContentLogicalHeight(); virtual LayoutSize offsetFromContainer(RenderObject*, const LayoutPoint&, bool* offsetDependsOnPoint = 0) const; LayoutUnit adjustBorderBoxLogicalWidthForBoxSizing(LayoutUnit width) const; LayoutUnit adjustBorderBoxLogicalHeightForBoxSizing(LayoutUnit height) const; LayoutUnit adjustContentBoxLogicalWidthForBoxSizing(LayoutUnit width) const; LayoutUnit adjustContentBoxLogicalHeightForBoxSizing(LayoutUnit height) const; struct ComputedMarginValues { ComputedMarginValues() : m_before(0) , m_after(0) , m_start(0) , m_end(0) { } LayoutUnit m_before; LayoutUnit m_after; LayoutUnit m_start; LayoutUnit m_end; }; struct LogicalExtentComputedValues { LogicalExtentComputedValues() : m_extent(0) , m_position(0) { } LayoutUnit m_extent; LayoutUnit m_position; ComputedMarginValues m_margins; }; // 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, LayoutUnit& marginStart, LayoutUnit& marginEnd) const; // Used to resolve margins in the containing block's block-flow direction. void computeBlockDirectionMargins(const RenderBlock* containingBlock, LayoutUnit& marginBefore, LayoutUnit& marginAfter) const; void computeAndSetBlockDirectionMargins(const RenderBlock* containingBlock); enum RenderBoxRegionInfoFlags { CacheRenderBoxRegionInfo, DoNotCacheRenderBoxRegionInfo }; LayoutRect borderBoxRectInRegion(RenderRegion*, RenderBoxRegionInfoFlags = CacheRenderBoxRegionInfo) const; void clearRenderBoxRegionInfo(); virtual LayoutUnit offsetFromLogicalTopOfFirstPage() const; 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(const RenderLayerModelObject* repaintContainer) const OVERRIDE; virtual void computeRectForRepaint(const RenderLayerModelObject* repaintContainer, LayoutRect&, bool fixed = false) const OVERRIDE; void repaintDuringLayoutIfMoved(const LayoutRect&); virtual void repaintOverhangingFloats(bool paintAllDescendants); virtual LayoutUnit containingBlockLogicalWidthForContent() const; LayoutUnit containingBlockLogicalHeightForContent(AvailableLogicalHeightType) const; LayoutUnit containingBlockLogicalWidthForContentInRegion(RenderRegion*) const; LayoutUnit containingBlockAvailableLineWidthInRegion(RenderRegion*) const; LayoutUnit perpendicularContainingBlockLogicalHeight() const; virtual void updateLogicalWidth(); virtual void updateLogicalHeight(); virtual void computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues&) const; RenderBoxRegionInfo* renderBoxRegionInfo(RenderRegion*, RenderBoxRegionInfoFlags = CacheRenderBoxRegionInfo) const; void computeLogicalWidthInRegion(LogicalExtentComputedValues&, RenderRegion* = 0) const; bool stretchesToViewport() const { return document()->inQuirksMode() && style()->logicalHeight().isAuto() && !isFloatingOrOutOfFlowPositioned() && (isRoot() || isBody()) && !document()->shouldDisplaySeamlesslyWithParent() && !isInline(); } 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, s, legends, and floating/compact elements do this. bool sizesLogicalWidthToFitContent(SizeType) const; LayoutUnit shrinkLogicalWidthToAvoidFloats(LayoutUnit childMarginStart, LayoutUnit childMarginEnd, const RenderBlock* cb, RenderRegion*) const; LayoutUnit computeLogicalWidthInRegionUsing(SizeType, Length logicalWidth, LayoutUnit availableLogicalWidth, const RenderBlock* containingBlock, RenderRegion*) const; LayoutUnit computeLogicalHeightUsing(const Length& height) const; LayoutUnit computeContentLogicalHeight(const Length& height) const; LayoutUnit computeContentAndScrollbarLogicalHeightUsing(const Length& height) const; LayoutUnit computeReplacedLogicalWidthUsing(Length width) const; LayoutUnit computeReplacedLogicalWidthRespectingMinMaxWidth(LayoutUnit logicalWidth, ShouldComputePreferred = ComputeActual) const; LayoutUnit computeReplacedLogicalHeightUsing(Length height) const; LayoutUnit computeReplacedLogicalHeightRespectingMinMaxHeight(LayoutUnit logicalHeight) const; virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred = ComputeActual) const; virtual LayoutUnit computeReplacedLogicalHeight() const; static bool percentageLogicalHeightIsResolvableFromBlock(const RenderBlock* containingBlock, bool outOfFlowPositioned); LayoutUnit computePercentageLogicalHeight(const Length& height) const; // Block flows subclass availableWidth/Height to handle multi column layout (shrinking the width/height available to children when laying out.) virtual LayoutUnit availableLogicalWidth() const { return contentLogicalWidth(); } virtual LayoutUnit availableLogicalHeight(AvailableLogicalHeightType) const; LayoutUnit availableLogicalHeightUsing(const Length&, AvailableLogicalHeightType) 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(IncludeMarginBorderPadding); } LayoutUnit availableHeight() const { return style()->isHorizontalWritingMode() ? availableLogicalHeight(IncludeMarginBorderPadding) : availableLogicalWidth(); } virtual int verticalScrollbarWidth() const; int horizontalScrollbarHeight() const; int instrinsicScrollbarLogicalWidth() 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(const IntPoint&); bool canAutoscroll() const; IntSize calculateAutoscrollDirection(const IntPoint& windowPoint) const; static RenderBox* findAutoscrollable(RenderObject*); 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 usesCompositedScrolling() const; bool hasUnsplittableScrollingOverflow() const; bool isUnsplittableForPagination() const; virtual LayoutRect localCaretRect(InlineBox*, int caretOffset, LayoutUnit* extraWidthToEndOfLine = 0); virtual LayoutRect overflowClipRect(const LayoutPoint& location, RenderRegion*, OverlayScrollbarSizeRelevancy = IgnoreOverlayScrollbarSize, PaintPhase = PaintPhaseBlockBackground); virtual LayoutRect overflowClipRectForChildLayers(const LayoutPoint& location, RenderRegion* region, OverlayScrollbarSizeRelevancy relevancy) { return overflowClipRect(location, region, relevancy); } 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(); updateLogicalWidth(); // If we shrink to fit our width may have changed, so we still need full layout. if (oldWidth != width()) return false; updateLogicalHeight(); return true; } LayoutRect maskClipRect(); virtual VisiblePosition positionForPoint(const LayoutPoint&); void removeFloatingOrPositionedChildFromBlockLists(); RenderLayer* enclosingFloatPaintingLayer() const; virtual int firstLineBoxBaseline() const { return -1; } virtual int inlineBlockBaseline(LineDirectionMode) const { return -1; } // Returns -1 if we should skip this box when computing the baseline of an inline-block. 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() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isDeprecatedFlexibleBox(); } bool isFlexItemIncludingDeprecated() const { return !isInline() && !isFloatingOrOutOfFlowPositioned() && parent() && parent()->isFlexibleBoxIncludingDeprecated(); } virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const; virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const OVERRIDE; virtual LayoutUnit offsetLeft() const OVERRIDE; virtual LayoutUnit offsetTop() const OVERRIDE; LayoutPoint flipForWritingModeForChild(const RenderBox* child, const LayoutPoint&) const; LayoutUnit flipForWritingMode(LayoutUnit position) const; // The offset is in the block direction (y for horizontal writing modes, x for vertical writing modes). LayoutPoint flipForWritingMode(const LayoutPoint&) const; LayoutPoint flipForWritingModeIncludingColumns(const LayoutPoint&) const; LayoutSize flipForWritingMode(const LayoutSize&) const; void flipForWritingMode(LayoutRect&) 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; bool hasRenderOverflow() const { return m_overflow; } bool hasVisualOverflow() const { return m_overflow && !borderBoxRect().contains(m_overflow->visualOverflowRect()); } virtual bool needsPreferredWidthsRecalculation() const; virtual void computeIntrinsicRatioInformation(FloatSize& /* intrinsicSize */, double& /* intrinsicRatio */, bool& /* isPercentageIntrinsicSize */) const { } IntSize scrolledContentOffset() const; LayoutSize cachedSizeForOverflowClip() const; void applyCachedClipAndScrollOffsetForRepaint(LayoutRect& paintRect) const; virtual bool hasRelativeDimensions() const; virtual bool hasRelativeLogicalHeight() const; virtual bool hasViewportPercentageLogicalHeight() const; bool hasHorizontalLayoutOverflow() const { if (!m_overflow) return false; LayoutRect layoutOverflowRect = m_overflow->layoutOverflowRect(); flipForWritingMode(layoutOverflowRect); return layoutOverflowRect.x() < x() || layoutOverflowRect.maxX() > x() + logicalWidth(); } bool hasVerticalLayoutOverflow() const { if (!m_overflow) return false; LayoutRect layoutOverflowRect = m_overflow->layoutOverflowRect(); flipForWritingMode(layoutOverflowRect); return layoutOverflowRect.y() < y() || layoutOverflowRect.maxY() > y() + logicalHeight(); } virtual RenderBox* createAnonymousBoxWithSameTypeAs(const RenderObject*) const { ASSERT_NOT_REACHED(); return 0; } bool hasSameDirectionAs(const RenderBox* object) const { return style()->direction() == object->style()->direction(); } #if ENABLE(CSS_SHAPES) ShapeOutsideInfo* shapeOutsideInfo() const { return isFloatingWithShapeOutside() && ShapeOutsideInfo::isEnabledFor(this) ? ShapeOutsideInfo::info(this) : 0; } #endif protected: virtual void willBeDestroyed(); virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); virtual void updateFromStyle() OVERRIDE; // Returns false if it could not cheaply compute the extent (e.g. fixed background), in which case the returned rect may be incorrect. bool getBackgroundPaintedExtent(LayoutRect&) const; virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const; virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE; 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&); BackgroundBleedAvoidance determineBackgroundBleedAvoidance(GraphicsContext*) const; bool backgroundHasOpaqueTopLayer() const; #if PLATFORM(MAC) void paintCustomHighlight(const LayoutPoint&, const AtomicString& type, bool behindText); #endif void computePositionedLogicalWidth(LogicalExtentComputedValues&, RenderRegion* = 0) const; LayoutUnit computeIntrinsicLogicalWidthUsing(Length logicalWidthLength, LayoutUnit availableLogicalWidth, LayoutUnit borderAndPadding) const; virtual bool shouldComputeSizeAsReplaced() const { return isReplaced() && !isInlineBlockOrInlineTable(); } virtual void mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0) const OVERRIDE; virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject*, RenderGeometryMap&) const OVERRIDE; virtual void mapAbsoluteToLocalPoint(MapCoordinatesFlags, TransformState&) const; void paintRootBoxFillLayers(const PaintInfo&); RenderObject* splitAnonymousBoxesAroundChild(RenderObject* beforeChild); private: #if ENABLE(CSS_SHAPES) void updateShapeOutsideInfoAfterStyleChange(const ShapeValue* shapeOutside, const ShapeValue* oldShapeOutside); #endif bool fixedElementLaysOutRelativeToFrame(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); bool skipContainingBlockForPercentHeightCalculation(const RenderBox* containingBlock) const; LayoutUnit containingBlockLogicalWidthForPositioned(const RenderBoxModelObject* containingBlock, RenderRegion* = 0, bool checkForPerpendicularWritingMode = true) const; LayoutUnit containingBlockLogicalHeightForPositioned(const RenderBoxModelObject* containingBlock, bool checkForPerpendicularWritingMode = true) const; LayoutUnit viewLogicalHeightForPercentages() const; void computePositionedLogicalHeight(LogicalExtentComputedValues&) const; void computePositionedLogicalWidthUsing(Length logicalWidth, const RenderBoxModelObject* containerBlock, TextDirection containerDirection, LayoutUnit containerLogicalWidth, LayoutUnit bordersPlusPadding, Length logicalLeft, Length logicalRight, Length marginLogicalLeft, Length marginLogicalRight, LogicalExtentComputedValues&) const; void computePositionedLogicalHeightUsing(Length logicalHeightLength, const RenderBoxModelObject* containerBlock, LayoutUnit containerLogicalHeight, LayoutUnit bordersPlusPadding, LayoutUnit logicalHeight, Length logicalTop, Length logicalBottom, Length marginLogicalTop, Length marginLogicalBottom, LogicalExtentComputedValues&) const; void computePositionedLogicalHeightReplaced(LogicalExtentComputedValues&) const; void computePositionedLogicalWidthReplaced(LogicalExtentComputedValues&) const; LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth) const; LayoutUnit fillAvailableMeasure(LayoutUnit availableLogicalWidth, LayoutUnit& marginStart, LayoutUnit& marginEnd) const; virtual void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const; // 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); } virtual LayoutRect frameRectForStickyPositioning() const OVERRIDE { return frameRect(); } 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: LayoutBoxExtent m_marginBox; // 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 m_overflow; private: // Used to store state between styleWillChange and styleDidChange static bool s_hadOverflowClip; }; inline RenderBox* toRenderBox(RenderObject* object) { ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isBox()); return static_cast(object); } inline const RenderBox* toRenderBox(const RenderObject* object) { ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isBox()); return static_cast(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