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 "RenderForeignObject.h"
#include "RenderSVGResource.h"
#include "SVGLength.h"
#include "SVGNames.h"
#include <wtf/Assertions.h>

namespace WebCore {

SVGForeignObjectElement::SVGForeignObjectElement(const QualifiedName& tagName, Document* document)
    : SVGStyledTransformableElement(tagName, document)
    , m_x(LengthModeWidth)
    , m_y(LengthModeHeight)
    , m_width(LengthModeWidth)
    , m_height(LengthModeHeight)
{
}

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

void SVGForeignObjectElement::parseMappedAttribute(Attribute* attr)
{
    const AtomicString& value = attr->value();
    if (attr->name() == SVGNames::xAttr)
        setXBaseValue(SVGLength(LengthModeWidth, value));
    else if (attr->name() == SVGNames::yAttr)
        setYBaseValue(SVGLength(LengthModeHeight, value));
    else if (attr->name() == SVGNames::widthAttr)
        setWidthBaseValue(SVGLength(LengthModeWidth, value));
    else if (attr->name() == SVGNames::heightAttr)
        setHeightBaseValue(SVGLength(LengthModeHeight, value));
    else {
        if (SVGTests::parseMappedAttribute(attr))
            return;
        if (SVGLangSpace::parseMappedAttribute(attr))
            return;
        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
            return;
        SVGStyledTransformableElement::parseMappedAttribute(attr);
    }
}

void SVGForeignObjectElement::svgAttributeChanged(const QualifiedName& attrName)
{
    SVGStyledTransformableElement::svgAttributeChanged(attrName);

    bool isLengthAttribute = attrName == SVGNames::xAttr
                          || attrName == SVGNames::yAttr
                          || attrName == SVGNames::widthAttr
                          || attrName == SVGNames::heightAttr;

    if (isLengthAttribute)
        updateRelativeLengthsInformation();

    RenderObject* renderer = this->renderer();
    if (!renderer)
        return;

    if (SVGStyledTransformableElement::isKnownAttribute(attrName)) {
        renderer->setNeedsTransformUpdate();
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
        return;
    }

    if (isLengthAttribute
        || SVGTests::isKnownAttribute(attrName)
        || SVGLangSpace::isKnownAttribute(attrName)
        || SVGExternalResourcesRequired::isKnownAttribute(attrName))
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
}

void SVGForeignObjectElement::synchronizeProperty(const QualifiedName& attrName)
{
    SVGStyledTransformableElement::synchronizeProperty(attrName);

    if (attrName == anyQName()) {
        synchronizeX();
        synchronizeY();
        synchronizeWidth();
        synchronizeHeight();
        synchronizeExternalResourcesRequired();
        synchronizeHref();
        return;
    }

    if (attrName == SVGNames::xAttr)
        synchronizeX();
    else if (attrName == SVGNames::yAttr)
        synchronizeY();
    else if (attrName == SVGNames::widthAttr)
        synchronizeWidth();
    else if (attrName == SVGNames::heightAttr)
        synchronizeHeight();
    else if (SVGExternalResourcesRequired::isKnownAttribute(attrName))
        synchronizeExternalResourcesRequired();
}

RenderObject* SVGForeignObjectElement::createRenderer(RenderArena* arena, RenderStyle*)
{
    return new (arena) RenderForeignObject(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