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/*
* 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 };
typedef unsigned BorderEdgeFlags;
enum BackgroundBleedAvoidance {
BackgroundBleedNone,
BackgroundBleedShrinkBackground,
BackgroundBleedUseTransparencyLayer
};
// 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();
LayoutUnit relativePositionOffsetX() const;
LayoutUnit relativePositionOffsetY() const;
LayoutSize relativePositionOffset() const { return LayoutSize(relativePositionOffsetX(), relativePositionOffsetY()); }
LayoutSize 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 LayoutUnit offsetLeft() const;
virtual LayoutUnit offsetTop() const;
virtual LayoutUnit offsetWidth() const = 0;
virtual LayoutUnit offsetHeight() const = 0;
// FIXME: The implementation for these functions will change once we move to subpixel layout. See bug 60318.
int pixelSnappedOffsetLeft() const { return offsetLeft(); }
int pixelSnappedOffsetTop() const { return offsetTop(); }
int pixelSnappedOffsetWidth() const;
int pixelSnappedOffsetHeight() const;
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() || hasFilter() || style()->specifiesColumns(); }
// This will work on inlines to return the bounding box of all of the lines' border boxes.
virtual LayoutRect borderBoundingBox() const = 0;
// Virtual since table cells override
virtual LayoutUnit paddingTop(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingBottom(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingLeft(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingRight(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingBefore(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingAfter(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingStart(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit paddingEnd(bool includeIntrinsicPadding = true) const;
virtual LayoutUnit borderTop() const { return style()->borderTopWidth(); }
virtual LayoutUnit borderBottom() const { return style()->borderBottomWidth(); }
virtual LayoutUnit borderLeft() const { return style()->borderLeftWidth(); }
virtual LayoutUnit borderRight() const { return style()->borderRightWidth(); }
virtual LayoutUnit borderBefore() const { return style()->borderBeforeWidth(); }
virtual LayoutUnit borderAfter() const { return style()->borderAfterWidth(); }
virtual LayoutUnit borderStart() const { return style()->borderStartWidth(); }
virtual LayoutUnit borderEnd() const { return style()->borderEndWidth(); }
LayoutUnit borderAndPaddingHeight() const { return borderTop() + borderBottom() + paddingTop() + paddingBottom(); }
LayoutUnit borderAndPaddingWidth() const { return borderLeft() + borderRight() + paddingLeft() + paddingRight(); }
LayoutUnit borderAndPaddingLogicalHeight() const { return borderBefore() + borderAfter() + paddingBefore() + paddingAfter(); }
LayoutUnit borderAndPaddingLogicalWidth() const { return borderStart() + borderEnd() + paddingStart() + paddingEnd(); }
LayoutUnit borderAndPaddingLogicalLeft() const { return style()->isHorizontalWritingMode() ? borderLeft() + paddingLeft() : borderTop() + paddingTop(); }
LayoutUnit borderAndPaddingStart() const { return borderStart() + paddingStart(); }
LayoutUnit borderLogicalLeft() const { return style()->isHorizontalWritingMode() ? borderLeft() : borderTop(); }
LayoutUnit borderLogicalRight() const { return style()->isHorizontalWritingMode() ? borderRight() : borderBottom(); }
virtual LayoutUnit marginTop() const = 0;
virtual LayoutUnit marginBottom() const = 0;
virtual LayoutUnit marginLeft() const = 0;
virtual LayoutUnit marginRight() const = 0;
virtual LayoutUnit marginBefore() const = 0;
virtual LayoutUnit marginAfter() const = 0;
virtual LayoutUnit marginStart() const = 0;
virtual LayoutUnit marginEnd() const = 0;
bool hasInlineDirectionBordersPaddingOrMargin() const { return hasInlineDirectionBordersOrPadding() || marginStart()|| marginEnd(); }
bool hasInlineDirectionBordersOrPadding() const { return borderStart() || borderEnd() || paddingStart()|| paddingEnd(); }
virtual LayoutUnit containingBlockLogicalWidthForContent() const;
virtual void childBecameNonInline(RenderObject* /*child*/) { }
void paintBorder(const PaintInfo&, const LayoutRect&, const RenderStyle*, BackgroundBleedAvoidance = BackgroundBleedNone, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
bool paintNinePieceImage(GraphicsContext*, const LayoutRect&, const RenderStyle*, const NinePieceImage&, CompositeOperator = CompositeSourceOver);
void paintBoxShadow(const PaintInfo&, const LayoutRect&, const RenderStyle*, ShadowStyle, bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true);
void paintFillLayerExtended(const PaintInfo&, const Color&, const FillLayer*, const LayoutRect&, BackgroundBleedAvoidance, InlineFlowBox* = 0, const LayoutSize& = LayoutSize(), CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0);
virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox* = 0) const;
// Overridden by subclasses to determine line height and baseline position.
virtual LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0;
virtual LayoutUnit baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const = 0;
virtual void mapAbsoluteToLocalPoint(bool fixed, bool useTransforms, TransformState&) const OVERRIDE;
// Called by RenderObject::willBeDestroyed() and is the only way layers should ever be destroyed
void destroyLayer();
void highQualityRepaintTimerFired(Timer<RenderBoxModelObject>*);
virtual void setSelectionState(SelectionState s);
protected:
virtual void willBeDestroyed();
class BackgroundImageGeometry {
public:
IntPoint destOrigin() const { return m_destOrigin; }
void setDestOrigin(const IntPoint& destOrigin)
{
m_destOrigin = destOrigin;
}
IntRect destRect() const { return m_destRect; }
void setDestRect(const IntRect& destRect)
{
m_destRect = destRect;
}
// Returns the phase relative to the destination rectangle.
IntPoint relativePhase() const;
IntPoint phase() const { return m_phase; }
void setPhase(const IntPoint& phase)
{
m_phase = phase;
}
IntSize tileSize() const { return m_tileSize; }
void setTileSize(const IntSize& tileSize)
{
m_tileSize = tileSize;
}
void setPhaseX(int x) { m_phase.setX(x); }
void setPhaseY(int y) { m_phase.setY(y); }
void setNoRepeatX(int xOffset);
void setNoRepeatY(int yOffset);
void useFixedAttachment(const IntPoint& attachmentPoint);
void clip(const IntRect&);
private:
IntRect m_destRect;
IntPoint m_destOrigin;
IntPoint m_phase;
IntSize m_tileSize;
};
void calculateBackgroundImageGeometry(const FillLayer*, const LayoutRect& paintRect, BackgroundImageGeometry&);
void getBorderEdgeInfo(class BorderEdge[], bool includeLogicalLeftEdge = true, bool includeLogicalRightEdge = true) const;
bool borderObscuresBackgroundEdge(const FloatSize& contextScale) const;
bool borderObscuresBackground() const;
bool shouldPaintAtLowQuality(GraphicsContext*, Image*, const void*, const LayoutSize&);
RenderBoxModelObject* continuation() const;
void setContinuation(RenderBoxModelObject*);
static bool shouldAntialiasLines(GraphicsContext*);
public:
// For RenderBlocks and RenderInlines with m_style->styleType() == FIRST_LETTER, this tracks their remaining text fragments
RenderObject* firstLetterRemainingText() const;
void setFirstLetterRemainingText(RenderObject*);
private:
virtual bool isBoxModelObject() const { return true; }
IntSize calculateFillTileSize(const FillLayer*, const IntSize& scaledPositioningAreaSize) const;
IntSize calculateImageIntrinsicDimensions(StyleImage*, const IntSize& scaledPositioningAreaSize) const;
RoundedRect getBackgroundRoundedRect(const LayoutRect&, InlineFlowBox*, LayoutUnit inlineBoxWidth, LayoutUnit inlineBoxHeight,
bool includeLogicalLeftEdge, bool includeLogicalRightEdge);
void clipBorderSidePolygon(GraphicsContext*, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
BoxSide, bool firstEdgeMatches, bool secondEdgeMatches);
void clipBorderSideForComplexInnerPath(GraphicsContext*, const RoundedRect&, const RoundedRect&, BoxSide, const class BorderEdge[]);
void paintOneBorderSide(GraphicsContext*, const RenderStyle*, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
const LayoutRect& sideRect, BoxSide, BoxSide adjacentSide1, BoxSide adjacentSide2, const class BorderEdge[],
const Path*, BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias, const Color* overrideColor = 0);
void paintTranslucentBorderSides(GraphicsContext*, const RenderStyle*, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
const class BorderEdge[], BackgroundBleedAvoidance, bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false);
void paintBorderSides(GraphicsContext*, const RenderStyle*, const RoundedRect& outerBorder, const RoundedRect& innerBorder,
const class BorderEdge[], BorderEdgeFlags, BackgroundBleedAvoidance,
bool includeLogicalLeftEdge, bool includeLogicalRightEdge, bool antialias = false, const Color* overrideColor = 0);
void drawBoxSideFromPath(GraphicsContext*, const LayoutRect&, const Path&, const class BorderEdge[],
float thickness, float drawThickness, BoxSide, const RenderStyle*,
Color, EBorderStyle, BackgroundBleedAvoidance, 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<RenderBoxModelObject*>(object);
}
inline const RenderBoxModelObject* toRenderBoxModelObject(const RenderObject* object)
{
ASSERT(!object || object->isBoxModelObject());
return static_cast<const RenderBoxModelObject*>(object);
}
// This will catch anyone doing an unnecessary cast.
void toRenderBoxModelObject(const RenderBoxModelObject*);
} // namespace WebCore
#endif // RenderBoxModelObject_h
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