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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"
namespace WebCore {
// Values for vertical alignment.
const int PositionTop = -0x7fffffff;
const int PositionBottom = 0x7fffffff;
const int PositionUndefined = 0x80000000;
// 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()); }
// 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 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(); }
int borderAndPaddingHeight() const { return borderTop() + borderBottom() + paddingTop() + paddingBottom(); }
int borderAndPaddingWidth() const { return borderLeft() + borderRight() + paddingLeft() + paddingRight(); }
virtual int marginTop() const = 0;
virtual int marginBottom() const = 0;
virtual int marginLeft() const = 0;
virtual int marginRight() const = 0;
bool hasHorizontalBordersPaddingOrMargin() const { return hasHorizontalBordersOrPadding() || marginLeft() != 0 || marginRight() != 0; }
bool hasHorizontalBordersOrPadding() const { return borderLeft() != 0 || borderRight() != 0 || paddingLeft() != 0 || paddingRight() != 0; }
virtual int containingBlockWidthForContent() const;
virtual void childBecameNonInline(RenderObject* /*child*/) { }
void paintBorder(GraphicsContext*, int tx, int ty, int w, int h, const RenderStyle*, bool begin = true, bool end = 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 begin = true, bool end = true);
void paintFillLayerExtended(const PaintInfo&, const Color&, const FillLayer*, int tx, int ty, int width, int height, InlineFlowBox* = 0, CompositeOperator = CompositeSourceOver, RenderObject* backgroundObject = 0);
// The difference between this inline's baseline position and the line's baseline position.
int verticalPosition(bool firstLine) const;
// Called by RenderObject::destroy() (and RenderWidget::destroy()) and is the only way layers should ever be destroyed
void destroyLayer();
void highQualityRepaintTimerFired(Timer<RenderBoxModelObject>*);
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 IntSize&);
private:
virtual bool isBoxModelObject() const { return true; }
IntSize calculateFillTileSize(const FillLayer*, IntSize scaledSize) const;
void clipBorderSidePolygon(GraphicsContext*, const IntRect&, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight, const BoxSide side, bool firstEdgeMatches, bool secondEdgeMatches, const RenderStyle* style);
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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