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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 Rob Buis <buis (at) kde.org>
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #include "config.h"
     22 
     23 #include "core/svg/SVGCursorElement.h"
     24 
     25 #include "core/SVGNames.h"
     26 #include "core/XLinkNames.h"
     27 
     28 namespace blink {
     29 
     30 inline SVGCursorElement::SVGCursorElement(Document& document)
     31     : SVGElement(SVGNames::cursorTag, document)
     32     , SVGTests(this)
     33     , SVGURIReference(this)
     34     , m_x(SVGAnimatedLength::create(this, SVGNames::xAttr, SVGLength::create(LengthModeWidth), AllowNegativeLengths))
     35     , m_y(SVGAnimatedLength::create(this, SVGNames::yAttr, SVGLength::create(LengthModeHeight), AllowNegativeLengths))
     36 {
     37     addToPropertyMap(m_x);
     38     addToPropertyMap(m_y);
     39 }
     40 
     41 DEFINE_NODE_FACTORY(SVGCursorElement)
     42 
     43 SVGCursorElement::~SVGCursorElement()
     44 {
     45     // The below teardown is all handled by weak pointer processing in oilpan.
     46 #if !ENABLE(OILPAN)
     47     HashSet<RawPtr<SVGElement> >::iterator end = m_clients.end();
     48     for (HashSet<RawPtr<SVGElement> >::iterator it = m_clients.begin(); it != end; ++it)
     49         (*it)->cursorElementRemoved();
     50 #endif
     51 }
     52 
     53 bool SVGCursorElement::isSupportedAttribute(const QualifiedName& attrName)
     54 {
     55     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     56     if (supportedAttributes.isEmpty()) {
     57         SVGTests::addSupportedAttributes(supportedAttributes);
     58         SVGURIReference::addSupportedAttributes(supportedAttributes);
     59         supportedAttributes.add(SVGNames::xAttr);
     60         supportedAttributes.add(SVGNames::yAttr);
     61     }
     62     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     63 }
     64 
     65 void SVGCursorElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     66 {
     67     SVGParsingError parseError = NoError;
     68 
     69     if (!isSupportedAttribute(name)) {
     70         SVGElement::parseAttribute(name, value);
     71     } else if (name == SVGNames::xAttr) {
     72         m_x->setBaseValueAsString(value, parseError);
     73     } else if (name == SVGNames::yAttr) {
     74         m_y->setBaseValueAsString(value, parseError);
     75     } else if (SVGURIReference::parseAttribute(name, value, parseError)) {
     76     } else if (SVGTests::parseAttribute(name, value)) {
     77     } else {
     78         ASSERT_NOT_REACHED();
     79     }
     80 
     81     reportAttributeParsingError(parseError, name, value);
     82 }
     83 
     84 void SVGCursorElement::addClient(SVGElement* element)
     85 {
     86     m_clients.add(element);
     87     element->setCursorElement(this);
     88 }
     89 
     90 #if !ENABLE(OILPAN)
     91 void SVGCursorElement::removeClient(SVGElement* element)
     92 {
     93     HashSet<RawPtr<SVGElement> >::iterator it = m_clients.find(element);
     94     if (it != m_clients.end()) {
     95         m_clients.remove(it);
     96         element->cursorElementRemoved();
     97     }
     98 }
     99 #endif
    100 
    101 void SVGCursorElement::removeReferencedElement(SVGElement* element)
    102 {
    103     m_clients.remove(element);
    104 }
    105 
    106 void SVGCursorElement::svgAttributeChanged(const QualifiedName& attrName)
    107 {
    108     if (!isSupportedAttribute(attrName)) {
    109         SVGElement::svgAttributeChanged(attrName);
    110         return;
    111     }
    112 
    113     SVGElement::InvalidationGuard invalidationGuard(this);
    114 
    115     // Any change of a cursor specific attribute triggers this recalc.
    116     WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> >::const_iterator it = m_clients.begin();
    117     WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> >::const_iterator end = m_clients.end();
    118 
    119     for (; it != end; ++it)
    120         (*it)->setNeedsStyleRecalc(SubtreeStyleChange);
    121 }
    122 
    123 void SVGCursorElement::trace(Visitor* visitor)
    124 {
    125 #if ENABLE(OILPAN)
    126     visitor->trace(m_clients);
    127 #endif
    128     SVGElement::trace(visitor);
    129 }
    130 
    131 } // namespace blink
    132