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      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 "core/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 inline SVGMPathElement::SVGMPathElement(Document& document)
     33     : SVGElement(SVGNames::mpathTag, document)
     34     , SVGURIReference(this)
     35 {
     36     ScriptWrappable::init(this);
     37 }
     38 
     39 DEFINE_NODE_FACTORY(SVGMPathElement)
     40 
     41 SVGMPathElement::~SVGMPathElement()
     42 {
     43 #if !ENABLE(OILPAN)
     44     clearResourceReferences();
     45 #endif
     46 }
     47 
     48 void SVGMPathElement::buildPendingResource()
     49 {
     50     clearResourceReferences();
     51     if (!inDocument())
     52         return;
     53 
     54     AtomicString id;
     55     Element* target = SVGURIReference::targetElementFromIRIString(hrefString(), treeScope(), &id);
     56     if (!target) {
     57         // Do not register as pending if we are already pending this resource.
     58         if (document().accessSVGExtensions().isElementPendingResource(this, id))
     59             return;
     60 
     61         if (!id.isEmpty()) {
     62             document().accessSVGExtensions().addPendingResource(id, this);
     63             ASSERT(hasPendingResources());
     64         }
     65     } else if (target->isSVGElement()) {
     66         // Register us with the target in the dependencies map. Any change of hrefElement
     67         // that leads to relayout/repainting now informs us, so we can react to it.
     68         document().accessSVGExtensions().addElementReferencingTarget(this, toSVGElement(target));
     69     }
     70 
     71     targetPathChanged();
     72 }
     73 
     74 void SVGMPathElement::clearResourceReferences()
     75 {
     76     document().accessSVGExtensions().removeAllTargetReferencesForElement(this);
     77 }
     78 
     79 Node::InsertionNotificationRequest SVGMPathElement::insertedInto(ContainerNode* rootParent)
     80 {
     81     SVGElement::insertedInto(rootParent);
     82     if (rootParent->inDocument())
     83         buildPendingResource();
     84     return InsertionDone;
     85 }
     86 
     87 void SVGMPathElement::removedFrom(ContainerNode* rootParent)
     88 {
     89     SVGElement::removedFrom(rootParent);
     90     notifyParentOfPathChange(rootParent);
     91     if (rootParent->inDocument())
     92         clearResourceReferences();
     93 }
     94 
     95 bool SVGMPathElement::isSupportedAttribute(const QualifiedName& attrName)
     96 {
     97     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     98     if (supportedAttributes.isEmpty()) {
     99         SVGURIReference::addSupportedAttributes(supportedAttributes);
    100     }
    101     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
    102 }
    103 
    104 void SVGMPathElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
    105 {
    106     SVGParsingError parseError = NoError;
    107 
    108     if (!isSupportedAttribute(name)) {
    109         SVGElement::parseAttribute(name, value);
    110     } else if (SVGURIReference::parseAttribute(name, value, parseError)) {
    111     } else {
    112         ASSERT_NOT_REACHED();
    113     }
    114 
    115     reportAttributeParsingError(parseError, name, value);
    116 }
    117 
    118 void SVGMPathElement::svgAttributeChanged(const QualifiedName& attrName)
    119 {
    120     if (!isSupportedAttribute(attrName)) {
    121         SVGElement::svgAttributeChanged(attrName);
    122         return;
    123     }
    124 
    125     SVGElement::InvalidationGuard invalidationGuard(this);
    126 
    127     if (SVGURIReference::isKnownAttribute(attrName)) {
    128         buildPendingResource();
    129         return;
    130     }
    131 
    132     ASSERT_NOT_REACHED();
    133 }
    134 
    135 SVGPathElement* SVGMPathElement::pathElement()
    136 {
    137     Element* target = targetElementFromIRIString(hrefString(), treeScope());
    138     return isSVGPathElement(target) ? toSVGPathElement(target) : 0;
    139 }
    140 
    141 void SVGMPathElement::targetPathChanged()
    142 {
    143     notifyParentOfPathChange(parentNode());
    144 }
    145 
    146 void SVGMPathElement::notifyParentOfPathChange(ContainerNode* parent)
    147 {
    148     if (isSVGAnimateMotionElement(parent))
    149         toSVGAnimateMotionElement(parent)->updateAnimationPath();
    150 }
    151 
    152 } // namespace WebCore
    153