1 /* 2 * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org> 3 * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org> 4 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Library General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Library General Public License for more details. 15 * 16 * You should have received a copy of the GNU Library General Public License 17 * along with this library; see the file COPYING.LIB. If not, write to 18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 19 * Boston, MA 02110-1301, USA. 20 */ 21 22 #ifndef SVGLocatable_h 23 #define SVGLocatable_h 24 25 #if ENABLE(SVG) 26 #include "AffineTransform.h" 27 #include "ExceptionCode.h" 28 29 namespace WebCore { 30 31 class FloatRect; 32 class SVGElement; 33 34 class SVGLocatable { 35 public: ~SVGLocatable()36 virtual ~SVGLocatable() { } 37 38 // 'SVGLocatable' functions 39 virtual SVGElement* nearestViewportElement() const = 0; 40 virtual SVGElement* farthestViewportElement() const = 0; 41 42 enum StyleUpdateStrategy { AllowStyleUpdate, DisallowStyleUpdate }; 43 44 virtual FloatRect getBBox(StyleUpdateStrategy) const = 0; 45 virtual AffineTransform getCTM(StyleUpdateStrategy) const = 0; 46 virtual AffineTransform getScreenCTM(StyleUpdateStrategy) const = 0; 47 AffineTransform getTransformToElement(SVGElement*, ExceptionCode&, StyleUpdateStrategy = AllowStyleUpdate) const; 48 49 static SVGElement* nearestViewportElement(const SVGElement*); 50 static SVGElement* farthestViewportElement(const SVGElement*); 51 52 enum CTMScope { 53 NearestViewportScope, // Used for getCTM() 54 ScreenScope // Used for getScreenCTM() 55 }; 56 57 protected: localCoordinateSpaceTransform(SVGLocatable::CTMScope)58 virtual AffineTransform localCoordinateSpaceTransform(SVGLocatable::CTMScope) const { return AffineTransform(); } 59 60 static FloatRect getBBox(const SVGElement*, StyleUpdateStrategy); 61 static AffineTransform computeCTM(const SVGElement*, CTMScope, StyleUpdateStrategy); 62 }; 63 64 } // namespace WebCore 65 66 #endif // ENABLE(SVG) 67 #endif // SVGLocatable_h 68