Home | History | Annotate | Download | only in svg 
      1 /*
      2  * Copyright (C) 2007 Eric Seidel <eric (at) webkit.org>
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #include "config.h"
     21 
     22 #include "core/svg/SVGMPathElement.h"
     23 
     24 #include "XLinkNames.h"
     25 #include "core/dom/Document.h"
     26 #include "core/svg/SVGAnimateMotionElement.h"
     27 #include "core/svg/SVGDocumentExtensions.h"
     28 #include "core/svg/SVGPathElement.h"
     29 
     30 namespace WebCore {
     31 
     32 // Animated property definitions
     33 DEFINE_ANIMATED_STRING(SVGMPathElement, XLinkNames::hrefAttr, Href, href)
     34 DEFINE_ANIMATED_BOOLEAN(SVGMPathElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
     35 
     36 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGMPathElement)
     37     REGISTER_LOCAL_ANIMATED_PROPERTY(href)
     38     REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
     39 END_REGISTER_ANIMATED_PROPERTIES
     40 
     41 inline SVGMPathElement::SVGMPathElement(Document& document)
     42     : SVGElement(SVGNames::mpathTag, document)
     43 {
     44     ScriptWrappable::init(this);
     45     registerAnimatedPropertiesForSVGMPathElement();
     46 }
     47 
     48 PassRefPtr<SVGMPathElement> SVGMPathElement::create(Document& document)
     49 {
     50     return adoptRef(new SVGMPathElement(document));
     51 }
     52 
     53 SVGMPathElement::~SVGMPathElement()
     54 {
     55     clearResourceReferences();
     56 }
     57 
     58 void SVGMPathElement::buildPendingResource()
     59 {
     60     clearResourceReferences();
     61     if (!inDocument())
     62         return;
     63 
     64     String id;
     65     Element* target = SVGURIReference::targetElementFromIRIString(hrefCurrentValue(), document(), &id);
     66     if (!target) {
     67         // Do not register as pending if we are already pending this resource.
     68         if (document().accessSVGExtensions()->isElementPendingResource(this, id))
     69             return;
     70 
     71         if (!id.isEmpty()) {
     72             document().accessSVGExtensions()->addPendingResource(id, this);
     73             ASSERT(hasPendingResources());
     74         }
     75     } else if (target->isSVGElement()) {
     76         // Register us with the target in the dependencies map. Any change of hrefElement
     77         // that leads to relayout/repainting now informs us, so we can react to it.
     78         document().accessSVGExtensions()->addElementReferencingTarget(this, toSVGElement(target));
     79     }
     80 
     81     targetPathChanged();
     82 }
     83 
     84 void SVGMPathElement::clearResourceReferences()
     85 {
     86     document().accessSVGExtensions()->removeAllTargetReferencesForElement(this);
     87 }
     88 
     89 Node::InsertionNotificationRequest SVGMPathElement::insertedInto(ContainerNode* rootParent)
     90 {
     91     SVGElement::insertedInto(rootParent);
     92     if (rootParent->inDocument())
     93         buildPendingResource();
     94     return InsertionDone;
     95 }
     96 
     97 void SVGMPathElement::removedFrom(ContainerNode* rootParent)
     98 {
     99     SVGElement::removedFrom(rootParent);
    100     notifyParentOfPathChange(rootParent);
    101     if (rootParent->inDocument())
    102         clearResourceReferences();
    103 }
    104 
    105 bool SVGMPathElement::isSupportedAttribute(const QualifiedName& attrName)
    106 {
    107     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
    108     if (supportedAttributes.isEmpty()) {
    109         SVGURIReference::addSupportedAttributes(supportedAttributes);
    110         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
    111     }
    112     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
    113 }
    114 
    115 void SVGMPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
    116 {
    117     if (!isSupportedAttribute(name)) {
    118         SVGElement::parseAttribute(name, value);
    119         return;
    120     }
    121 
    122     if (SVGURIReference::parseAttribute(name, value))
    123         return;
    124     if (SVGExternalResourcesRequired::parseAttribute(name, value))
    125         return;
    126 
    127     ASSERT_NOT_REACHED();
    128 }
    129 
    130 void SVGMPathElement::svgAttributeChanged(const QualifiedName& attrName)
    131 {
    132     if (!isSupportedAttribute(attrName)) {
    133         SVGElement::svgAttributeChanged(attrName);
    134         return;
    135     }
    136 
    137     SVGElementInstance::InvalidationGuard invalidationGuard(this);
    138 
    139     if (SVGURIReference::isKnownAttribute(attrName)) {
    140         buildPendingResource();
    141         return;
    142     }
    143 
    144     if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
    145         return;
    146 
    147     ASSERT_NOT_REACHED();
    148 }
    149 
    150 SVGPathElement* SVGMPathElement::pathElement()
    151 {
    152     Element* target = targetElementFromIRIString(hrefCurrentValue(), document());
    153     if (target && target->hasTagName(SVGNames::pathTag))
    154         return toSVGPathElement(target);
    155     return 0;
    156 }
    157 
    158 void SVGMPathElement::targetPathChanged()
    159 {
    160     notifyParentOfPathChange(parentNode());
    161 }
    162 
    163 void SVGMPathElement::notifyParentOfPathChange(ContainerNode* parent)
    164 {
    165     if (parent && parent->hasTagName(SVGNames::animateMotionTag))
    166         static_cast<SVGAnimateMotionElement*>(parent)->updateAnimationPath();
    167 }
    168 
    169 } // namespace WebCore
    170