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) 2014 Samsung Electronics. 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#include "config.h"
23
24#include "core/svg/SVGFitToViewBox.h"
25
26#include "core/dom/Attribute.h"
27#include "core/svg/SVGDocumentExtensions.h"
28#include "core/svg/SVGElement.h"
29#include "core/svg/SVGParserUtilities.h"
30#include "platform/geometry/FloatRect.h"
31#include "platform/transforms/AffineTransform.h"
32#include "wtf/text/StringImpl.h"
33
34namespace blink {
35
36SVGFitToViewBox::SVGFitToViewBox(SVGElement* element, PropertyMapPolicy propertyMapPolicy)
37    : m_viewBox(SVGAnimatedRect::create(element, SVGNames::viewBoxAttr))
38    , m_preserveAspectRatio(SVGAnimatedPreserveAspectRatio::create(element, SVGNames::preserveAspectRatioAttr, SVGPreserveAspectRatio::create()))
39{
40    ASSERT(element);
41    if (propertyMapPolicy == PropertyMapPolicyAdd) {
42        element->addToPropertyMap(m_viewBox);
43        element->addToPropertyMap(m_preserveAspectRatio);
44    }
45}
46
47AffineTransform SVGFitToViewBox::viewBoxToViewTransform(const FloatRect& viewBoxRect, PassRefPtr<SVGPreserveAspectRatio> preserveAspectRatio, float viewWidth, float viewHeight)
48{
49    if (!viewBoxRect.width() || !viewBoxRect.height() || !viewWidth || !viewHeight)
50        return AffineTransform();
51
52    return preserveAspectRatio->getCTM(viewBoxRect.x(), viewBoxRect.y(), viewBoxRect.width(), viewBoxRect.height(), viewWidth, viewHeight);
53}
54
55bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
56{
57    return attrName == SVGNames::viewBoxAttr || attrName == SVGNames::preserveAspectRatioAttr;
58}
59
60void SVGFitToViewBox::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
61{
62    supportedAttributes.add(SVGNames::viewBoxAttr);
63    supportedAttributes.add(SVGNames::preserveAspectRatioAttr);
64}
65
66void SVGFitToViewBox::updateViewBox(const FloatRect& rect)
67{
68    ASSERT(m_viewBox);
69    m_viewBox->baseValue()->setValue(rect);
70}
71
72}
73