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      1 /*
      2  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis (at) kde.org>
      4  * Copyright (C) Research In Motion Limited 2009-2010. All rights reserved.
      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/SVGMarkerElement.h"
     25 
     26 #include "core/SVGNames.h"
     27 #include "core/rendering/svg/RenderSVGResourceMarker.h"
     28 #include "core/svg/SVGAngleTearOff.h"
     29 
     30 namespace blink {
     31 
     32 template<> const SVGEnumerationStringEntries& getStaticStringEntries<SVGMarkerUnitsType>()
     33 {
     34     DEFINE_STATIC_LOCAL(SVGEnumerationStringEntries, entries, ());
     35     if (entries.isEmpty()) {
     36         entries.append(std::make_pair(SVGMarkerUnitsUserSpaceOnUse, "userSpaceOnUse"));
     37         entries.append(std::make_pair(SVGMarkerUnitsStrokeWidth, "strokeWidth"));
     38     }
     39     return entries;
     40 }
     41 
     42 
     43 inline SVGMarkerElement::SVGMarkerElement(Document& document)
     44     : SVGElement(SVGNames::markerTag, document)
     45     , SVGFitToViewBox(this)
     46     , m_refX(SVGAnimatedLength::create(this, SVGNames::refXAttr, SVGLength::create(LengthModeWidth), AllowNegativeLengths))
     47     , m_refY(SVGAnimatedLength::create(this, SVGNames::refXAttr, SVGLength::create(LengthModeWidth), AllowNegativeLengths))
     48     , m_markerWidth(SVGAnimatedLength::create(this, SVGNames::markerWidthAttr, SVGLength::create(LengthModeWidth), ForbidNegativeLengths))
     49     , m_markerHeight(SVGAnimatedLength::create(this, SVGNames::markerHeightAttr, SVGLength::create(LengthModeHeight), ForbidNegativeLengths))
     50     , m_orientAngle(SVGAnimatedAngle::create(this))
     51     , m_markerUnits(SVGAnimatedEnumeration<SVGMarkerUnitsType>::create(this, SVGNames::markerUnitsAttr, SVGMarkerUnitsStrokeWidth))
     52 {
     53     // Spec: If the markerWidth/markerHeight attribute is not specified, the effect is as if a value of "3" were specified.
     54     m_markerWidth->setDefaultValueAsString("3");
     55     m_markerHeight->setDefaultValueAsString("3");
     56 
     57     addToPropertyMap(m_refX);
     58     addToPropertyMap(m_refY);
     59     addToPropertyMap(m_markerWidth);
     60     addToPropertyMap(m_markerHeight);
     61     addToPropertyMap(m_orientAngle);
     62     addToPropertyMap(m_markerUnits);
     63 }
     64 
     65 DEFINE_NODE_FACTORY(SVGMarkerElement)
     66 
     67 AffineTransform SVGMarkerElement::viewBoxToViewTransform(float viewWidth, float viewHeight) const
     68 {
     69     return SVGFitToViewBox::viewBoxToViewTransform(viewBox()->currentValue()->value(), preserveAspectRatio()->currentValue(), viewWidth, viewHeight);
     70 }
     71 
     72 bool SVGMarkerElement::isSupportedAttribute(const QualifiedName& attrName)
     73 {
     74     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     75     if (supportedAttributes.isEmpty()) {
     76         SVGFitToViewBox::addSupportedAttributes(supportedAttributes);
     77         supportedAttributes.add(SVGNames::markerUnitsAttr);
     78         supportedAttributes.add(SVGNames::refXAttr);
     79         supportedAttributes.add(SVGNames::refYAttr);
     80         supportedAttributes.add(SVGNames::markerWidthAttr);
     81         supportedAttributes.add(SVGNames::markerHeightAttr);
     82         supportedAttributes.add(SVGNames::orientAttr);
     83     }
     84     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
     85 }
     86 
     87 void SVGMarkerElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
     88 {
     89     SVGParsingError parseError = NoError;
     90 
     91     if (!isSupportedAttribute(name))
     92         SVGElement::parseAttribute(name, value);
     93     else if (name == SVGNames::markerUnitsAttr)
     94         m_markerUnits->setBaseValueAsString(value, parseError);
     95     else if (name == SVGNames::refXAttr)
     96         m_refX->setBaseValueAsString(value, parseError);
     97     else if (name == SVGNames::refYAttr)
     98         m_refY->setBaseValueAsString(value, parseError);
     99     else if (name == SVGNames::markerWidthAttr)
    100         m_markerWidth->setBaseValueAsString(value, parseError);
    101     else if (name == SVGNames::markerHeightAttr)
    102         m_markerHeight->setBaseValueAsString(value, parseError);
    103     else if (name == SVGNames::orientAttr)
    104         m_orientAngle->setBaseValueAsString(value, parseError);
    105     else if (SVGFitToViewBox::parseAttribute(name, value, document(), parseError)) {
    106     } else
    107         ASSERT_NOT_REACHED();
    108 
    109     reportAttributeParsingError(parseError, name, value);
    110 }
    111 
    112 void SVGMarkerElement::svgAttributeChanged(const QualifiedName& attrName)
    113 {
    114     if (!isSupportedAttribute(attrName)) {
    115         SVGElement::svgAttributeChanged(attrName);
    116         return;
    117     }
    118 
    119     SVGElement::InvalidationGuard invalidationGuard(this);
    120 
    121     if (attrName == SVGNames::refXAttr
    122         || attrName == SVGNames::refYAttr
    123         || attrName == SVGNames::markerWidthAttr
    124         || attrName == SVGNames::markerHeightAttr)
    125         updateRelativeLengthsInformation();
    126 
    127     RenderSVGResourceContainer* renderer = toRenderSVGResourceContainer(this->renderer());
    128     if (renderer)
    129         renderer->invalidateCacheAndMarkForLayout();
    130 }
    131 
    132 void SVGMarkerElement::childrenChanged(const ChildrenChange& change)
    133 {
    134     SVGElement::childrenChanged(change);
    135 
    136     if (change.byParser)
    137         return;
    138 
    139     if (RenderObject* object = renderer())
    140         object->setNeedsLayoutAndFullPaintInvalidation();
    141 }
    142 
    143 void SVGMarkerElement::setOrientToAuto()
    144 {
    145     m_orientAngle->baseValue()->orientType()->setEnumValue(SVGMarkerOrientAuto);
    146     invalidateSVGAttributes();
    147     svgAttributeChanged(SVGNames::orientAttr);
    148 }
    149 
    150 void SVGMarkerElement::setOrientToAngle(PassRefPtr<SVGAngleTearOff> angle)
    151 {
    152     ASSERT(angle);
    153     RefPtr<SVGAngle> target = angle->target();
    154     m_orientAngle->baseValue()->newValueSpecifiedUnits(target->unitType(), target->valueInSpecifiedUnits());
    155     invalidateSVGAttributes();
    156     svgAttributeChanged(SVGNames::orientAttr);
    157 }
    158 
    159 RenderObject* SVGMarkerElement::createRenderer(RenderStyle*)
    160 {
    161     return new RenderSVGResourceMarker(this);
    162 }
    163 
    164 bool SVGMarkerElement::selfHasRelativeLengths() const
    165 {
    166     return m_refX->currentValue()->isRelative()
    167         || m_refY->currentValue()->isRelative()
    168         || m_markerWidth->currentValue()->isRelative()
    169         || m_markerHeight->currentValue()->isRelative();
    170 }
    171 
    172 } // namespace blink
    173