1/*
2 * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Rob Buis <buis@kde.org>
4 * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
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/SVGImageElement.h"
25
26#include "CSSPropertyNames.h"
27#include "SVGNames.h"
28#include "XLinkNames.h"
29#include "core/rendering/RenderImageResource.h"
30#include "core/rendering/svg/RenderSVGImage.h"
31#include "core/rendering/svg/RenderSVGResource.h"
32#include "core/svg/SVGElementInstance.h"
33
34namespace WebCore {
35
36// Animated property definitions
37DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::xAttr, X, x)
38DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::yAttr, Y, y)
39DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::widthAttr, Width, width)
40DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::heightAttr, Height, height)
41DEFINE_ANIMATED_PRESERVEASPECTRATIO(SVGImageElement, SVGNames::preserveAspectRatioAttr, PreserveAspectRatio, preserveAspectRatio)
42DEFINE_ANIMATED_STRING(SVGImageElement, XLinkNames::hrefAttr, Href, href)
43DEFINE_ANIMATED_BOOLEAN(SVGImageElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
44
45BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGImageElement)
46    REGISTER_LOCAL_ANIMATED_PROPERTY(x)
47    REGISTER_LOCAL_ANIMATED_PROPERTY(y)
48    REGISTER_LOCAL_ANIMATED_PROPERTY(width)
49    REGISTER_LOCAL_ANIMATED_PROPERTY(height)
50    REGISTER_LOCAL_ANIMATED_PROPERTY(preserveAspectRatio)
51    REGISTER_LOCAL_ANIMATED_PROPERTY(href)
52    REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
53    REGISTER_PARENT_ANIMATED_PROPERTIES(SVGGraphicsElement)
54END_REGISTER_ANIMATED_PROPERTIES
55
56inline SVGImageElement::SVGImageElement(const QualifiedName& tagName, Document* document)
57    : SVGGraphicsElement(tagName, document)
58    , m_x(LengthModeWidth)
59    , m_y(LengthModeHeight)
60    , m_width(LengthModeWidth)
61    , m_height(LengthModeHeight)
62    , m_imageLoader(this)
63{
64    ASSERT(hasTagName(SVGNames::imageTag));
65    ScriptWrappable::init(this);
66    registerAnimatedPropertiesForSVGImageElement();
67}
68
69PassRefPtr<SVGImageElement> SVGImageElement::create(const QualifiedName& tagName, Document* document)
70{
71    return adoptRef(new SVGImageElement(tagName, document));
72}
73
74bool SVGImageElement::isSupportedAttribute(const QualifiedName& attrName)
75{
76    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
77    if (supportedAttributes.isEmpty()) {
78        SVGLangSpace::addSupportedAttributes(supportedAttributes);
79        SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
80        SVGURIReference::addSupportedAttributes(supportedAttributes);
81        supportedAttributes.add(SVGNames::xAttr);
82        supportedAttributes.add(SVGNames::yAttr);
83        supportedAttributes.add(SVGNames::widthAttr);
84        supportedAttributes.add(SVGNames::heightAttr);
85        supportedAttributes.add(SVGNames::preserveAspectRatioAttr);
86    }
87    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
88}
89
90bool SVGImageElement::isPresentationAttribute(const QualifiedName& name) const
91{
92    if (name == SVGNames::widthAttr || name == SVGNames::heightAttr)
93        return true;
94    return SVGGraphicsElement::isPresentationAttribute(name);
95}
96
97void SVGImageElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style)
98{
99    if (!isSupportedAttribute(name))
100        SVGGraphicsElement::collectStyleForPresentationAttribute(name, value, style);
101    else if (name == SVGNames::widthAttr)
102        addPropertyToPresentationAttributeStyle(style, CSSPropertyWidth, value);
103    else if (name == SVGNames::heightAttr)
104        addPropertyToPresentationAttributeStyle(style, CSSPropertyHeight, value);
105}
106
107void SVGImageElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
108{
109    SVGParsingError parseError = NoError;
110
111    if (!isSupportedAttribute(name))
112        SVGGraphicsElement::parseAttribute(name, value);
113    else if (name == SVGNames::xAttr)
114        setXBaseValue(SVGLength::construct(LengthModeWidth, value, parseError));
115    else if (name == SVGNames::yAttr)
116        setYBaseValue(SVGLength::construct(LengthModeHeight, value, parseError));
117    else if (name == SVGNames::preserveAspectRatioAttr) {
118        SVGPreserveAspectRatio preserveAspectRatio;
119        preserveAspectRatio.parse(value);
120        setPreserveAspectRatioBaseValue(preserveAspectRatio);
121    } else if (name == SVGNames::widthAttr)
122        setWidthBaseValue(SVGLength::construct(LengthModeWidth, value, parseError, ForbidNegativeLengths));
123    else if (name == SVGNames::heightAttr)
124        setHeightBaseValue(SVGLength::construct(LengthModeHeight, value, parseError, ForbidNegativeLengths));
125    else if (SVGLangSpace::parseAttribute(name, value)
126             || SVGExternalResourcesRequired::parseAttribute(name, value)
127             || SVGURIReference::parseAttribute(name, value)) {
128    } else
129        ASSERT_NOT_REACHED();
130
131    reportAttributeParsingError(parseError, name, value);
132}
133
134void SVGImageElement::svgAttributeChanged(const QualifiedName& attrName)
135{
136    if (!isSupportedAttribute(attrName)) {
137        SVGGraphicsElement::svgAttributeChanged(attrName);
138        return;
139    }
140
141    SVGElementInstance::InvalidationGuard invalidationGuard(this);
142
143    bool isLengthAttribute = attrName == SVGNames::xAttr
144                          || attrName == SVGNames::yAttr
145                          || attrName == SVGNames::widthAttr
146                          || attrName == SVGNames::heightAttr;
147
148    if (isLengthAttribute)
149        updateRelativeLengthsInformation();
150
151    if (SVGURIReference::isKnownAttribute(attrName)) {
152        m_imageLoader.updateFromElementIgnoringPreviousError();
153        return;
154    }
155
156    RenderObject* renderer = this->renderer();
157    if (!renderer)
158        return;
159
160    if (isLengthAttribute) {
161        if (toRenderSVGImage(renderer)->updateImageViewport())
162            RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
163        return;
164    }
165
166    if (attrName == SVGNames::preserveAspectRatioAttr
167        || SVGLangSpace::isKnownAttribute(attrName)
168        || SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
169        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
170        return;
171    }
172
173    ASSERT_NOT_REACHED();
174}
175
176bool SVGImageElement::selfHasRelativeLengths() const
177{
178    return xCurrentValue().isRelative()
179        || yCurrentValue().isRelative()
180        || widthCurrentValue().isRelative()
181        || heightCurrentValue().isRelative();
182}
183
184RenderObject* SVGImageElement::createRenderer(RenderStyle*)
185{
186    return new RenderSVGImage(this);
187}
188
189bool SVGImageElement::haveLoadedRequiredResources()
190{
191    return !externalResourcesRequiredBaseValue() || !m_imageLoader.hasPendingActivity();
192}
193
194void SVGImageElement::attach(const AttachContext& context)
195{
196    SVGGraphicsElement::attach(context);
197
198    if (RenderSVGImage* imageObj = toRenderSVGImage(renderer())) {
199        if (imageObj->imageResource()->hasImage())
200            return;
201
202        imageObj->imageResource()->setImageResource(m_imageLoader.image());
203    }
204}
205
206Node::InsertionNotificationRequest SVGImageElement::insertedInto(ContainerNode* rootParent)
207{
208    SVGGraphicsElement::insertedInto(rootParent);
209    if (!rootParent->inDocument())
210        return InsertionDone;
211    // Update image loader, as soon as we're living in the tree.
212    // We can only resolve base URIs properly, after that!
213    m_imageLoader.updateFromElement();
214    return InsertionDone;
215}
216
217const AtomicString& SVGImageElement::imageSourceURL() const
218{
219    return getAttribute(XLinkNames::hrefAttr);
220}
221
222void SVGImageElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
223{
224    SVGGraphicsElement::addSubresourceAttributeURLs(urls);
225
226    addSubresourceURL(urls, document()->completeURL(hrefCurrentValue()));
227}
228
229void SVGImageElement::didMoveToNewDocument(Document* oldDocument)
230{
231    m_imageLoader.elementDidMoveToNewDocument();
232    SVGGraphicsElement::didMoveToNewDocument(oldDocument);
233}
234
235}
236