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/*
* Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
* Copyright (C) Research In Motion Limited 2010. 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 SVGLocatable_h
#define SVGLocatable_h
#include "core/svg/SVGRect.h"
#include "platform/transforms/AffineTransform.h"
namespace WebCore {
class ExceptionState;
class SVGElement;
class SVGLocatable {
public:
virtual ~SVGLocatable() { }
// 'SVGLocatable' functions
virtual SVGElement* nearestViewportElement() const = 0;
virtual SVGElement* farthestViewportElement() const = 0;
enum StyleUpdateStrategy { AllowStyleUpdate, DisallowStyleUpdate };
virtual AffineTransform getCTM(StyleUpdateStrategy) = 0;
virtual AffineTransform getScreenCTM(StyleUpdateStrategy) = 0;
AffineTransform getTransformToElement(SVGElement*, ExceptionState&, StyleUpdateStrategy = AllowStyleUpdate);
static SVGElement* nearestViewportElement(const SVGElement*);
static SVGElement* farthestViewportElement(const SVGElement*);
enum CTMScope {
NearestViewportScope, // Used for getCTM()
ScreenScope // Used for getScreenCTM()
};
protected:
virtual AffineTransform localCoordinateSpaceTransform(SVGLocatable::CTMScope) const { return AffineTransform(); }
static AffineTransform computeCTM(SVGElement*, CTMScope, StyleUpdateStrategy);
};
} // namespace WebCore
#endif // SVGLocatable_h