Source/WebCore/svg/SVGForeignObjectElement.cpp

/*
 * Copyright (C) 2006 Apple Inc. All rights reserved.
 * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@kde.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "config.h"

#if ENABLE(SVG) && ENABLE(SVG_FOREIGN_OBJECT)
#include "SVGForeignObjectElement.h"

#include "Attribute.h"
#include "CSSPropertyNames.h"
#include "RenderSVGForeignObject.h"
#include "RenderSVGResource.h"
#include "SVGElementInstance.h"
#include "SVGLength.h"
#include "SVGNames.h"
#include <wtf/Assertions.h>

namespace WebCore {

// Animated property definitions
DEFINE_ANIMATED_LENGTH(SVGForeignObjectElement, SVGNames::xAttr, X, x)
DEFINE_ANIMATED_LENGTH(SVGForeignObjectElement, SVGNames::yAttr, Y, y)
DEFINE_ANIMATED_LENGTH(SVGForeignObjectElement, SVGNames::widthAttr, Width, width)
DEFINE_ANIMATED_LENGTH(SVGForeignObjectElement, SVGNames::heightAttr, Height, height)
DEFINE_ANIMATED_STRING(SVGForeignObjectElement, XLinkNames::hrefAttr, Href, href)
DEFINE_ANIMATED_BOOLEAN(SVGForeignObjectElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)

inline SVGForeignObjectElement::SVGForeignObjectElement(const QualifiedName& tagName, Document* document)
    : SVGStyledTransformableElement(tagName, document)
    , m_x(LengthModeWidth)
    , m_y(LengthModeHeight)
    , m_width(LengthModeWidth)
    , m_height(LengthModeHeight)
{
    ASSERT(hasTagName(SVGNames::foreignObjectTag));
}

PassRefPtr<SVGForeignObjectElement> SVGForeignObjectElement::create(const QualifiedName& tagName, Document* document)
{
    return adoptRef(new SVGForeignObjectElement(tagName, document));
}

bool SVGForeignObjectElement::isSupportedAttribute(const QualifiedName& attrName)
{
    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
    if (supportedAttributes.isEmpty()) {
        SVGTests::addSupportedAttributes(supportedAttributes);
        SVGLangSpace::addSupportedAttributes(supportedAttributes);
        SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
        supportedAttributes.add(SVGNames::xAttr);
        supportedAttributes.add(SVGNames::yAttr);
        supportedAttributes.add(SVGNames::widthAttr);
        supportedAttributes.add(SVGNames::heightAttr);
    }
    return supportedAttributes.contains(attrName);
}

void SVGForeignObjectElement::parseMappedAttribute(Attribute* attr)
{
    if (!isSupportedAttribute(attr->name())) {
        SVGStyledTransformableElement::parseMappedAttribute(attr);
        return;
    }

    const AtomicString& value = attr->value();
    if (attr->name() == SVGNames::xAttr) {
        setXBaseValue(SVGLength(LengthModeWidth, value));
        return;
    }

    if (attr->name() == SVGNames::yAttr) {
        setYBaseValue(SVGLength(LengthModeHeight, value));
        return;
    }

    if (attr->name() == SVGNames::widthAttr) {
        setWidthBaseValue(SVGLength(LengthModeWidth, value));
        return;
    }

    if (attr->name() == SVGNames::heightAttr) {
        setHeightBaseValue(SVGLength(LengthModeHeight, value));
        return;
    }

    if (SVGTests::parseMappedAttribute(attr))
        return;
    if (SVGLangSpace::parseMappedAttribute(attr))
        return;
    if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
        return;

    ASSERT_NOT_REACHED();
}

void SVGForeignObjectElement::svgAttributeChanged(const QualifiedName& attrName)
{
    if (!isSupportedAttribute(attrName)) {
        SVGStyledTransformableElement::svgAttributeChanged(attrName);
        return;
    }

    SVGElementInstance::InvalidationGuard invalidationGuard(this);
    
    bool isLengthAttribute = attrName == SVGNames::xAttr
                          || attrName == SVGNames::yAttr
                          || attrName == SVGNames::widthAttr
                          || attrName == SVGNames::heightAttr;

    if (isLengthAttribute)
        updateRelativeLengthsInformation();

    if (SVGTests::handleAttributeChange(this, attrName))
        return;

    if (RenderObject* renderer = this->renderer())
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
}

void SVGForeignObjectElement::synchronizeProperty(const QualifiedName& attrName)
{
    if (attrName == anyQName()) {
        synchronizeX();
        synchronizeY();
        synchronizeWidth();
        synchronizeHeight();
        synchronizeExternalResourcesRequired();
        synchronizeHref();
        SVGTests::synchronizeProperties(this, attrName);
        SVGStyledTransformableElement::synchronizeProperty(attrName);
        return;
    }

    if (!isSupportedAttribute(attrName)) {
        SVGStyledTransformableElement::synchronizeProperty(attrName);
        return;
    }

    if (attrName == SVGNames::xAttr) {
        synchronizeX();
        return;
    }

    if (attrName == SVGNames::yAttr) {
        synchronizeY();
        return;
    }

    if (attrName == SVGNames::widthAttr) {
        synchronizeWidth();
        return;
    }

    if (attrName == SVGNames::heightAttr) {
        synchronizeHeight();
        return;
    }

    if (SVGExternalResourcesRequired::isKnownAttribute(attrName)) {
        synchronizeExternalResourcesRequired();
        return;
    }

    if (SVGTests::isKnownAttribute(attrName)) {
        SVGTests::synchronizeProperties(this, attrName);
        return;
    }

    ASSERT_NOT_REACHED();
}

AttributeToPropertyTypeMap& SVGForeignObjectElement::attributeToPropertyTypeMap()
{
    DEFINE_STATIC_LOCAL(AttributeToPropertyTypeMap, s_attributeToPropertyTypeMap, ());
    return s_attributeToPropertyTypeMap;
}

void SVGForeignObjectElement::fillAttributeToPropertyTypeMap()
{    
    AttributeToPropertyTypeMap& attributeToPropertyTypeMap = this->attributeToPropertyTypeMap();

    SVGStyledTransformableElement::fillPassedAttributeToPropertyTypeMap(attributeToPropertyTypeMap);
    attributeToPropertyTypeMap.set(SVGNames::xAttr, AnimatedLength);
    attributeToPropertyTypeMap.set(SVGNames::yAttr, AnimatedLength);
    attributeToPropertyTypeMap.set(SVGNames::widthAttr, AnimatedLength);
    attributeToPropertyTypeMap.set(SVGNames::heightAttr, AnimatedLength);
    attributeToPropertyTypeMap.set(XLinkNames::hrefAttr, AnimatedString);
}

RenderObject* SVGForeignObjectElement::createRenderer(RenderArena* arena, RenderStyle*)
{
    return new (arena) RenderSVGForeignObject(this);
}

bool SVGForeignObjectElement::childShouldCreateRenderer(Node* child) const
{
    // Disallow arbitary SVG content. Only allow proper <svg xmlns="svgNS"> subdocuments.
    if (child->isSVGElement())
        return child->hasTagName(SVGNames::svgTag);

    // Skip over SVG rules which disallow non-SVG kids
    return StyledElement::childShouldCreateRenderer(child);
}

bool SVGForeignObjectElement::selfHasRelativeLengths() const
{
    return x().isRelative()
        || y().isRelative()
        || width().isRelative()
        || height().isRelative();
}

}

#endif