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
34 namespace blink {
35
SVGFitToViewBox(SVGElement * element,PropertyMapPolicy propertyMapPolicy)36 SVGFitToViewBox::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
viewBoxToViewTransform(const FloatRect & viewBoxRect,PassRefPtr<SVGPreserveAspectRatio> preserveAspectRatio,float viewWidth,float viewHeight)47 AffineTransform 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
isKnownAttribute(const QualifiedName & attrName)55 bool SVGFitToViewBox::isKnownAttribute(const QualifiedName& attrName)
56 {
57 return attrName == SVGNames::viewBoxAttr || attrName == SVGNames::preserveAspectRatioAttr;
58 }
59
addSupportedAttributes(HashSet<QualifiedName> & supportedAttributes)60 void SVGFitToViewBox::addSupportedAttributes(HashSet<QualifiedName>& supportedAttributes)
61 {
62 supportedAttributes.add(SVGNames::viewBoxAttr);
63 supportedAttributes.add(SVGNames::preserveAspectRatioAttr);
64 }
65
updateViewBox(const FloatRect & rect)66 void SVGFitToViewBox::updateViewBox(const FloatRect& rect)
67 {
68 ASSERT(m_viewBox);
69 m_viewBox->baseValue()->setValue(rect);
70 }
71
72 }
73