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#pragma once
23
24#include "AffineTransform.h"
25#include "ExceptionOr.h"
26
27namespace WebCore {
28
29class FloatRect;
30class SVGElement;
31class SVGMatrix;
32
33class SVGLocatable {
34public:
35 virtual ~SVGLocatable() = default;
36
37 // 'SVGLocatable' functions
38 virtual SVGElement* nearestViewportElement() const = 0;
39 virtual SVGElement* farthestViewportElement() const = 0;
40
41 enum StyleUpdateStrategy { AllowStyleUpdate, DisallowStyleUpdate };
42
43 virtual FloatRect getBBox(StyleUpdateStrategy) = 0;
44 virtual AffineTransform getCTM(StyleUpdateStrategy) = 0;
45 virtual AffineTransform getScreenCTM(StyleUpdateStrategy) = 0;
46
47 ExceptionOr<Ref<SVGMatrix>> getTransformToElement(SVGElement*, StyleUpdateStrategy = AllowStyleUpdate);
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
57protected:
58 virtual AffineTransform localCoordinateSpaceTransform(SVGLocatable::CTMScope) const { return AffineTransform(); }
59
60 static FloatRect getBBox(SVGElement*, StyleUpdateStrategy);
61 static AffineTransform computeCTM(SVGElement*, CTMScope, StyleUpdateStrategy);
62};
63
64} // namespace WebCore
65