/* * Copyright (C) 1999 Lars Knoll (knoll@kde.org) * (C) 1999 Antti Koivisto (koivisto@kde.org) * Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved. * Copyright (C) 2010 Google 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 RenderBoxModelObject_h #define RenderBoxModelObject_h #include "RenderObject.h" #include "ShadowData.h" namespace WebCore { // Modes for some of the line-related functions. enum LinePositionMode { PositionOnContainingLine, PositionOfInteriorLineBoxes }; enum LineDirectionMode { HorizontalLine, VerticalLine }; // This class is the base for all objects that adhere to the CSS box model as described // at http://www.w3.org/TR/CSS21/box.html class RenderBoxModelObject : public RenderObject { public: RenderBoxModelObject(Node*); virtual ~RenderBoxModelObject(); virtual void destroy(); int relativePositionOffsetX() const; int relativePositionOffsetY() const; IntSize relativePositionOffset() const { return IntSize(relativePositionOffsetX(), relativePositionOffsetY()); } IntSize relativePositionLogicalOffset() const { return style()->isHorizontalWritingMode() ? relativePositionOffset() : relativePositionOffset().transposedSize(); } // 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 offsetLeft() const; virtual int offsetTop() const; virtual int offsetWidth() const = 0; virtual int offsetHeight() const = 0; virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); virtual void updateBoxModelInfoFromStyle(); bool hasSelfPaintingLayer() const; RenderLayer* layer() const { return m_layer; } virtual bool requiresLayer() const { return isRoot() || isPositioned() || isRelPositioned() || isTransparent() || hasOverflowClip() || hasTransform() || hasMask() || hasReflection() || style()->specifiesColumns(); } // This will work on inlines to return the bounding box of all of the lines' border boxes. virtual IntRect borderBoundingBox() const = 0; // Virtual since table cells override virtual int paddingTop(bool includeIntrinsicPadding = true) const; virtual int paddingBottom(bool includeIntrinsicPadding = true) const; virtual int paddingLeft(bool includeIntrinsicPadding = true) const; virtual int paddingRight(bool includeIntrinsicPadding = true) const; virtual int paddingBefore(bool includeIntrinsicPadding = true) const; virtual int paddingAfter(bool includeIntrinsicPadding = true) const; virtual int paddingStart(bool includeIntrinsicPadding = true) const; virtual int paddingEnd(bool includeIntrinsicPadding = true) const; virtual int borderTop() const { return style()->borderTopWidth(); } virtual int borderBottom() const { return style()->borderBottomWidth(); } virtual int borderLeft() const { return style()->borderLeftWidth(); } virtual int borderRight() const { return style()->borderRightWidth(); } virtual int borderBefore() const { return style()->borderBeforeWidth(); } virtual int borderAfter() const { return style()->borderAfterWidth(); } virtual int borderStart() const { return style()->borderStartWidth(); } virtual int borderEnd() const { return style()->borderEndWidth(); } int borderAndPaddingHeight() const { return borderTop() + borderBottom() + paddingTop() + paddingBottom(); } int borderAndPaddingWidth() const { return borderLeft() + borderRight() + paddingLeft() + paddingRight(); } int borderAndPaddingLogicalHeight() const { return borderBefore() + borderAfter() + paddingBefore() + paddingAfter(); } int borderAndPaddingLogicalWidth() const { return borderStart() + borderEnd() + paddingStart() + paddingEnd(); } virtual int marginTop() const = 0; virtual int marginBottom() const = 0; virtual int marginLeft() const = 0; virtual int marginRight() const = 0; virtual int marginBefore() const = 0; virtual int marginAfter() const = 0; virtual int marginStart() const = 0; virtual int marginEnd() const = 0; bool hasInlineDirectionBordersPaddingOrMargin() const { return hasInlineDirectionBordersOrPadding() || marginStart()|| marginEnd(); } bool hasInlineDirectionBordersOrPadding() const { return borderStart() || borderEnd() || paddingStart()|| paddingEnd(); } virtual int containingBlockLogicalWidthForContent() const; virtual void childBecameNonInline(RenderObject* /*child*/) { } void paintBorder(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true); bool paintNinePieceImage(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, const NinePieceImage&, CompositeOperator = CompositeSourceOver); void paintBoxShadow(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, ShadowStyle, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true); void paintFillLayerExtended(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int width, int height, InlineFlowBox* = 0, CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0); // Overridden by subclasses to determine line height and baseline position. virtual int lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0; virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0; // Called by RenderObject::destroy() (and RenderWidget::destroy()) and is the only way layers should ever be destroyed void destroyLayer(); void highQualityRepaintTimerFired(Timer*); virtual void setSelectionState(SelectionState s); protected: void calculateBackgroundImageGeometry(const FillLayer*, int tx, int ty, int w, int h, IntRect& destRect, IntPoint& phase, IntSize& tileSize); bool shouldPaintAtLowQuality(GraphicsContext*, Image*, const void*, const IntSize&); RenderBoxModelObject* continuation() const; void setContinuation(RenderBoxModelObject*); private: virtual bool isBoxModelObject() const { return true; } IntSize calculateFillTileSize(const FillLayer*, IntSize scaledSize) const; void clipBorderSidePolygon(GraphicsContext*, const RoundedIntRect& border, const BoxSide, bool firstEdgeMatches, bool secondEdgeMatches, const RenderStyle*, bool includeLogicalLeftEdge, bool includeLogicalRightEdge); friend class RenderView; RenderLayer* m_layer; // Used to store state between styleWillChange and styleDidChange static bool s_wasFloating; static bool s_hadLayer; static bool s_layerWasSelfPainting; }; inline RenderBoxModelObject* toRenderBoxModelObject(RenderObject* object) { ASSERT(!object || object->isBoxModelObject()); return static_cast(object); } inline const RenderBoxModelObject* toRenderBoxModelObject(const RenderObject* object) { ASSERT(!object || object->isBoxModelObject()); return static_cast(object); } // This will catch anyone doing an unnecessary cast. void toRenderBoxModelObject(const RenderBoxModelObject*); } // namespace WebCore #endif // RenderBoxModelObject_h