1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) kde.org) 4 * Copyright (C) 2003, 2006, 2007, 2009 Apple Inc. All rights reserved. 5 * Copyright (C) 2010 Google Inc. All rights reserved. 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Library General Public 9 * License as published by the Free Software Foundation; either 10 * version 2 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Library General Public License for more details. 16 * 17 * You should have received a copy of the GNU Library General Public License 18 * along with this library; see the file COPYING.LIB. If not, write to 19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 * Boston, MA 02110-1301, USA. 21 * 22 */ 23 24 #ifndef RenderBoxModelObject_h 25 #define RenderBoxModelObject_h 26 27 #include "RenderObject.h" 28 #include "ShadowData.h" 29 30 namespace WebCore { 31 32 // Modes for some of the line-related functions. 33 enum LinePositionMode { PositionOnContainingLine, PositionOfInteriorLineBoxes }; 34 enum LineDirectionMode { HorizontalLine, VerticalLine }; 35 typedef unsigned BorderEdgeFlags; 36 37 // This class is the base for all objects that adhere to the CSS box model as described 38 // at http://www.w3.org/TR/CSS21/box.html 39 40 class RenderBoxModelObject : public RenderObject { 41 public: 42 RenderBoxModelObject(Node*); 43 virtual ~RenderBoxModelObject(); 44 45 virtual void destroy(); 46 47 int relativePositionOffsetX() const; 48 int relativePositionOffsetY() const; 49 IntSize relativePositionOffset() const { return IntSize(relativePositionOffsetX(), relativePositionOffsetY()); } 50 IntSize relativePositionLogicalOffset() const { return style()->isHorizontalWritingMode() ? relativePositionOffset() : relativePositionOffset().transposedSize(); } 51 52 // IE extensions. Used to calculate offsetWidth/Height. Overridden by inlines (RenderFlow) 53 // to return the remaining width on a given line (and the height of a single line). 54 virtual int offsetLeft() const; 55 virtual int offsetTop() const; 56 virtual int offsetWidth() const = 0; 57 virtual int offsetHeight() const = 0; 58 59 virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle); 60 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle); 61 virtual void updateBoxModelInfoFromStyle(); 62 63 bool hasSelfPaintingLayer() const; 64 RenderLayer* layer() const { return m_layer; } 65 #if PLATFORM(ANDROID) 66 virtual bool requiresLayer() const { return isRoot() || isPositioned() || isRelPositioned() || isTransparent() || hasOverflowClip() || hasTransform() || hasMask() || hasReflection() || style()->specifiesColumns() || style()->hasFixedBackgroundImage(); } 67 #else 68 virtual bool requiresLayer() const { return isRoot() || isPositioned() || isRelPositioned() || isTransparent() || hasOverflowClip() || hasTransform() || hasMask() || hasReflection() || style()->specifiesColumns(); } 69 #endif 70 71 // This will work on inlines to return the bounding box of all of the lines' border boxes. 72 virtual IntRect borderBoundingBox() const = 0; 73 74 // Virtual since table cells override 75 virtual int paddingTop(bool includeIntrinsicPadding = true) const; 76 virtual int paddingBottom(bool includeIntrinsicPadding = true) const; 77 virtual int paddingLeft(bool includeIntrinsicPadding = true) const; 78 virtual int paddingRight(bool includeIntrinsicPadding = true) const; 79 virtual int paddingBefore(bool includeIntrinsicPadding = true) const; 80 virtual int paddingAfter(bool includeIntrinsicPadding = true) const; 81 virtual int paddingStart(bool includeIntrinsicPadding = true) const; 82 virtual int paddingEnd(bool includeIntrinsicPadding = true) const; 83 84 virtual int borderTop() const { return style()->borderTopWidth(); } 85 virtual int borderBottom() const { return style()->borderBottomWidth(); } 86 virtual int borderLeft() const { return style()->borderLeftWidth(); } 87 virtual int borderRight() const { return style()->borderRightWidth(); } 88 virtual int borderBefore() const { return style()->borderBeforeWidth(); } 89 virtual int borderAfter() const { return style()->borderAfterWidth(); } 90 virtual int borderStart() const { return style()->borderStartWidth(); } 91 virtual int borderEnd() const { return style()->borderEndWidth(); } 92 93 int borderAndPaddingHeight() const { return borderTop() + borderBottom() + paddingTop() + paddingBottom(); } 94 int borderAndPaddingWidth() const { return borderLeft() + borderRight() + paddingLeft() + paddingRight(); } 95 int borderAndPaddingLogicalHeight() const { return borderBefore() + borderAfter() + paddingBefore() + paddingAfter(); } 96 int borderAndPaddingLogicalWidth() const { return borderStart() + borderEnd() + paddingStart() + paddingEnd(); } 97 int borderAndPaddingLogicalLeft() const { return style()->isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); } 98 99 int borderAndPaddingStart() const { return borderStart() + paddingStart(); } 100 int borderLogicalLeft() const { return style()->isHorizontalWritingMode() ? borderLeft() : borderTop(); } 101 int borderLogicalRight() const { return style()->isHorizontalWritingMode() ? borderRight() : borderBottom(); } 102 103 virtual int marginTop() const = 0; 104 virtual int marginBottom() const = 0; 105 virtual int marginLeft() const = 0; 106 virtual int marginRight() const = 0; 107 virtual int marginBefore() const = 0; 108 virtual int marginAfter() const = 0; 109 virtual int marginStart() const = 0; 110 virtual int marginEnd() const = 0; 111 112 bool hasInlineDirectionBordersPaddingOrMargin() const { return hasInlineDirectionBordersOrPadding() || marginStart()|| marginEnd(); } 113 bool hasInlineDirectionBordersOrPadding() const { return borderStart() || borderEnd() || paddingStart()|| paddingEnd(); } 114 115 virtual int containingBlockLogicalWidthForContent() const; 116 117 virtual void childBecameNonInline(RenderObject* /*child*/) { } 118 119 void paintBorder(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true); 120 bool paintNinePieceImage(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, const NinePieceImage&, CompositeOperator = CompositeSourceOver); 121 void paintBoxShadow(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, ShadowStyle, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true); 122 void paintFillLayerExtended(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int width, int height, InlineFlowBox* = 0, int inlineBoxWidth = 0, int inlineBoxHeight = 0, CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0); 123 124 // Overridden by subclasses to determine line height and baseline position. 125 virtual int lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0; 126 virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0; 127 128 // Called by RenderObject::destroy() (and RenderWidget::destroy()) and is the only way layers should ever be destroyed 129 void destroyLayer(); 130 131 void highQualityRepaintTimerFired(Timer<RenderBoxModelObject>*); 132 133 virtual void setSelectionState(SelectionState s); 134 protected: 135 void calculateBackgroundImageGeometry(const FillLayer*, int tx, int ty, int w, int h, IntRect& destRect, IntPoint& phase, IntSize& tileSize); 136 137 bool shouldPaintAtLowQuality(GraphicsContext*, Image*, const void*, const IntSize&); 138 139 RenderBoxModelObject* continuation() const; 140 void setContinuation(RenderBoxModelObject*); 141 142 private: 143 virtual bool isBoxModelObject() const { return true; } 144 145 IntSize calculateFillTileSize(const FillLayer*, IntSize scaledSize) const; 146 147 RoundedIntRect getBackgroundRoundedRect(const IntRect&, InlineFlowBox*, int inlineBoxWidth, int inlineBoxHeight, 148 bool includeLogicalLeftEdge, bool includeLogicalRightEdge); 149 150 void clipBorderSidePolygon(GraphicsContext*, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 151 BoxSide, bool firstEdgeMatches, bool secondEdgeMatches); 152 void paintOneBorderSide(GraphicsContext*, const RenderStyle*, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 153 const IntRect& sideRect, BoxSide, BoxSide adjacentSide1, BoxSide adjacentSide2, const class BorderEdge[], 154 const Path*, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor = 0); 155 void paintTranslucentBorderSides(GraphicsContext*, const RenderStyle*, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 156 const class BorderEdge[], bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false); 157 void paintBorderSides(GraphicsContext*, const RenderStyle*, const RoundedIntRect& outerBorder, const RoundedIntRect& innerBorder, 158 const class BorderEdge[], BorderEdgeFlags, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false, const Color* overrideColor = 0); 159 void drawBoxSideFromPath(GraphicsContext*, const IntRect&, const Path&, const class BorderEdge[], 160 float thickness, float drawThickness, BoxSide, const RenderStyle*, 161 Color, EBorderStyle, bool includeLogicalLeftEdge, bool includeLogicalRightEdge); 162 163 friend class RenderView; 164 165 RenderLayer* m_layer; 166 167 // Used to store state between styleWillChange and styleDidChange 168 static bool s_wasFloating; 169 static bool s_hadLayer; 170 static bool s_layerWasSelfPainting; 171 }; 172 173 inline RenderBoxModelObject* toRenderBoxModelObject(RenderObject* object) 174 { 175 ASSERT(!object || object->isBoxModelObject()); 176 return static_cast<RenderBoxModelObject*>(object); 177 } 178 179 inline const RenderBoxModelObject* toRenderBoxModelObject(const RenderObject* object) 180 { 181 ASSERT(!object || object->isBoxModelObject()); 182 return static_cast<const RenderBoxModelObject*>(object); 183 } 184 185 // This will catch anyone doing an unnecessary cast. 186 void toRenderBoxModelObject(const RenderBoxModelObject*); 187 188 } // namespace WebCore 189 190 #endif // RenderBoxModelObject_h 191