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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, 2012 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 RenderLayerModelObject_h
#define RenderLayerModelObject_h
#include "RenderObject.h"
namespace WebCore {
class RenderLayer;
class RenderLayerModelObject : public RenderObject {
public:
RenderLayerModelObject(Node*);
virtual ~RenderLayerModelObject();
// Called by RenderObject::willBeDestroyed() and is the only way layers should ever be destroyed
void destroyLayer();
bool hasSelfPaintingLayer() const;
RenderLayer* layer() const { return m_layer; }
virtual void styleWillChange(StyleDifference, const RenderStyle* newStyle) OVERRIDE;
virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
virtual void updateFromStyle() { }
virtual bool requiresLayer() const = 0;
protected:
void ensureLayer();
virtual void willBeDestroyed() OVERRIDE;
private:
virtual bool isLayerModelObject() const OVERRIDE { return true; }
RenderLayer* m_layer;
// Used to store state between styleWillChange and styleDidChange
static bool s_wasFloating;
static bool s_hadLayer;
static bool s_hadTransform;
static bool s_layerWasSelfPainting;
};
inline RenderLayerModelObject* toRenderLayerModelObject(RenderObject* object)
{
ASSERT(!object || object->isLayerModelObject());
return static_cast<RenderLayerModelObject*>(object);
}
inline const RenderLayerModelObject* toRenderLayerModelObject(const RenderObject* object)
{
ASSERT(!object || object->isLayerModelObject());
return static_cast<const RenderLayerModelObject*>(object);
}
// This will catch anyone doing an unnecessary cast.
void toRenderLayerModelObject(const RenderLayerModelObject*);
} // namespace WebCore
#endif // RenderLayerModelObject_h
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