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      1 /*
      2  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) 2006 Alexander Kellett <lypanov (at) 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 
     34 namespace WebCore {
     35 
     36 // Animated property definitions
     37 DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::xAttr, X, x)
     38 DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::yAttr, Y, y)
     39 DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::widthAttr, Width, width)
     40 DEFINE_ANIMATED_LENGTH(SVGImageElement, SVGNames::heightAttr, Height, height)
     41 DEFINE_ANIMATED_PRESERVEASPECTRATIO(SVGImageElement, SVGNames::preserveAspectRatioAttr, PreserveAspectRatio, preserveAspectRatio)
     42 DEFINE_ANIMATED_STRING(SVGImageElement, XLinkNames::hrefAttr, Href, href)
     43 DEFINE_ANIMATED_BOOLEAN(SVGImageElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
     44 
     45 BEGIN_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)
     54 END_REGISTER_ANIMATED_PROPERTIES
     55 
     56 inline 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 
     69 PassRefPtr<SVGImageElement> SVGImageElement::create(const QualifiedName& tagName, Document* document)
     70 {
     71     return adoptRef(new SVGImageElement(tagName, document));
     72 }
     73 
     74 bool 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 
     90 bool 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 
     97 void 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 
    107 void 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 
    134 void 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 
    176 bool SVGImageElement::selfHasRelativeLengths() const
    177 {
    178     return xCurrentValue().isRelative()
    179         || yCurrentValue().isRelative()
    180         || widthCurrentValue().isRelative()
    181         || heightCurrentValue().isRelative();
    182 }
    183 
    184 RenderObject* SVGImageElement::createRenderer(RenderStyle*)
    185 {
    186     return new RenderSVGImage(this);
    187 }
    188 
    189 bool SVGImageElement::haveLoadedRequiredResources()
    190 {
    191     return !externalResourcesRequiredBaseValue() || !m_imageLoader.hasPendingActivity();
    192 }
    193 
    194 void 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 
    206 Node::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 
    217 const AtomicString& SVGImageElement::imageSourceURL() const
    218 {
    219     return getAttribute(XLinkNames::hrefAttr);
    220 }
    221 
    222 void SVGImageElement::addSubresourceAttributeURLs(ListHashSet<KURL>& urls) const
    223 {
    224     SVGGraphicsElement::addSubresourceAttributeURLs(urls);
    225 
    226     addSubresourceURL(urls, document()->completeURL(hrefCurrentValue()));
    227 }
    228 
    229 void SVGImageElement::didMoveToNewDocument(Document* oldDocument)
    230 {
    231     m_imageLoader.elementDidMoveToNewDocument();
    232     SVGGraphicsElement::didMoveToNewDocument(oldDocument);
    233 }
    234 
    235 }
    236