1/*
2 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@kde.org>
4 * Copyright (C) 2018-2019 Apple Inc. 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 "FloatRect.h"
25#include "QualifiedName.h"
26#include "SVGAnimatedPropertyImpl.h"
27#include "SVGNames.h"
28#include "SVGPreserveAspectRatio.h"
29#include "SVGPropertyOwnerRegistry.h"
30#include <wtf/HashSet.h>
31
32namespace WebCore {
33
34class AffineTransform;
35
36class SVGFitToViewBox {
37 WTF_MAKE_NONCOPYABLE(SVGFitToViewBox);
38public:
39 static AffineTransform viewBoxToViewTransform(const FloatRect& viewBoxRect, const SVGPreserveAspectRatioValue&, float viewWidth, float viewHeight);
40
41 using PropertyRegistry = SVGPropertyOwnerRegistry<SVGFitToViewBox>;
42
43 const FloatRect& viewBox() const { return m_viewBox->currentValue(); }
44 const SVGPreserveAspectRatioValue& preserveAspectRatio() const { return m_preserveAspectRatio->currentValue(); }
45
46 SVGAnimatedRect& viewBoxAnimated() { return m_viewBox; }
47 SVGAnimatedPreserveAspectRatio& preserveAspectRatioAnimated() { return m_preserveAspectRatio; }
48
49 void setViewBox(const FloatRect&);
50 void resetViewBox();
51
52 void setPreserveAspectRatio(const SVGPreserveAspectRatioValue& preserveAspectRatio) { m_preserveAspectRatio->setBaseValInternal(preserveAspectRatio); }
53 void resetPreserveAspectRatio() { m_preserveAspectRatio->setBaseValInternal({ }); }
54
55 String viewBoxString() const { return SVGPropertyTraits<FloatRect>::toString(viewBox()); }
56 String preserveAspectRatioString() const { return preserveAspectRatio().valueAsString(); }
57
58 bool hasValidViewBox() const { return m_isViewBoxValid; }
59 bool hasEmptyViewBox() const { return m_isViewBoxValid && viewBox().isEmpty(); }
60
61protected:
62 SVGFitToViewBox(SVGElement* contextElement, SVGPropertyAccess = SVGPropertyAccess::ReadWrite);
63
64 static bool isKnownAttribute(const QualifiedName& attributeName) { return PropertyRegistry::isKnownAttribute(attributeName); }
65
66 void reset();
67 bool parseAttribute(const QualifiedName&, const AtomicString&);
68 bool parseViewBox(const AtomicString& value, FloatRect& viewBox);
69 bool parseViewBox(const UChar*& start, const UChar* end, FloatRect& viewBox, bool validate = true);
70
71private:
72 Ref<SVGAnimatedRect> m_viewBox;
73 Ref<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
74 bool m_isViewBoxValid { false };
75};
76
77} // namespace WebCore
78