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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/SVGLineElement.h"
     24 
     25 #include "core/rendering/svg/RenderSVGResource.h"
     26 #include "core/svg/SVGLength.h"
     27 
     28 namespace WebCore {
     29 
     30 inline SVGLineElement::SVGLineElement(Document& document)
     31     : SVGGeometryElement(SVGNames::lineTag, document)
     32     , m_x1(SVGAnimatedLength::create(this, SVGNames::x1Attr, SVGLength::create(LengthModeWidth), AllowNegativeLengths))
     33     , m_y1(SVGAnimatedLength::create(this, SVGNames::y1Attr, SVGLength::create(LengthModeHeight), AllowNegativeLengths))
     34     , m_x2(SVGAnimatedLength::create(this, SVGNames::x2Attr, SVGLength::create(LengthModeWidth), AllowNegativeLengths))
     35     , m_y2(SVGAnimatedLength::create(this, SVGNames::y2Attr, SVGLength::create(LengthModeHeight), AllowNegativeLengths))
     36 {
     37     ScriptWrappable::init(this);
     38 
     39     addToPropertyMap(m_x1);
     40     addToPropertyMap(m_y1);
     41     addToPropertyMap(m_x2);
     42     addToPropertyMap(m_y2);
     43 }
     44 
     45 DEFINE_NODE_FACTORY(SVGLineElement)
     46 
     47 bool SVGLineElement::isSupportedAttribute(const QualifiedName& attrName)
     48 {
     49     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     50     if (supportedAttributes.isEmpty()) {
     51         supportedAttributes.add(SVGNames::x1Attr);
     52         supportedAttributes.add(SVGNames::x2Attr);
     53         supportedAttributes.add(SVGNames::y1Attr);
     54         supportedAttributes.add(SVGNames::y2Attr);
     55     }
     56     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     57 }
     58 
     59 void SVGLineElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     60 {
     61     SVGParsingError parseError = NoError;
     62 
     63     if (!isSupportedAttribute(name))
     64         SVGGeometryElement::parseAttribute(name, value);
     65     else if (name == SVGNames::x1Attr)
     66         m_x1->setBaseValueAsString(value, parseError);
     67     else if (name == SVGNames::y1Attr)
     68         m_y1->setBaseValueAsString(value, parseError);
     69     else if (name == SVGNames::x2Attr)
     70         m_x2->setBaseValueAsString(value, parseError);
     71     else if (name == SVGNames::y2Attr)
     72         m_y2->setBaseValueAsString(value, parseError);
     73     else
     74         ASSERT_NOT_REACHED();
     75 
     76     reportAttributeParsingError(parseError, name, value);
     77 }
     78 
     79 void SVGLineElement::svgAttributeChanged(const QualifiedName& attrName)
     80 {
     81     if (!isSupportedAttribute(attrName)) {
     82         SVGGeometryElement::svgAttributeChanged(attrName);
     83         return;
     84     }
     85 
     86     SVGElement::InvalidationGuard invalidationGuard(this);
     87 
     88     bool isLengthAttribute = attrName == SVGNames::x1Attr
     89                           || attrName == SVGNames::y1Attr
     90                           || attrName == SVGNames::x2Attr
     91                           || attrName == SVGNames::y2Attr;
     92 
     93     if (isLengthAttribute)
     94         updateRelativeLengthsInformation();
     95 
     96     RenderSVGShape* renderer = toRenderSVGShape(this->renderer());
     97     if (!renderer)
     98         return;
     99 
    100     if (isLengthAttribute) {
    101         renderer->setNeedsShapeUpdate();
    102         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
    103         return;
    104     }
    105 
    106     ASSERT_NOT_REACHED();
    107 }
    108 
    109 bool SVGLineElement::selfHasRelativeLengths() const
    110 {
    111     return m_x1->currentValue()->isRelative()
    112         || m_y1->currentValue()->isRelative()
    113         || m_x2->currentValue()->isRelative()
    114         || m_y2->currentValue()->isRelative();
    115 }
    116 
    117 }
    118