xref: /external/chromium_org/third_party/WebKit/Source/core/svg/SVGTextPositioningElement.cpp

/*
 * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@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"

#include "core/svg/SVGTextPositioningElement.h"

#include "core/SVGNames.h"
#include "core/rendering/svg/RenderSVGResource.h"
#include "core/rendering/svg/RenderSVGText.h"
#include "core/svg/SVGLengthList.h"
#include "core/svg/SVGNumberList.h"

namespace blink {

SVGTextPositioningElement::SVGTextPositioningElement(const QualifiedName& tagName, Document& document)
    : SVGTextContentElement(tagName, document)
    , m_x(SVGAnimatedLengthList::create(this, SVGNames::xAttr, SVGLengthList::create(LengthModeWidth)))
    , m_y(SVGAnimatedLengthList::create(this, SVGNames::yAttr, SVGLengthList::create(LengthModeHeight)))
    , m_dx(SVGAnimatedLengthList::create(this, SVGNames::dxAttr, SVGLengthList::create(LengthModeWidth)))
    , m_dy(SVGAnimatedLengthList::create(this, SVGNames::dyAttr, SVGLengthList::create(LengthModeHeight)))
    , m_rotate(SVGAnimatedNumberList::create(this, SVGNames::rotateAttr, SVGNumberList::create()))
{
    addToPropertyMap(m_x);
    addToPropertyMap(m_y);
    addToPropertyMap(m_dx);
    addToPropertyMap(m_dy);
    addToPropertyMap(m_rotate);
}

bool SVGTextPositioningElement::isSupportedAttribute(const QualifiedName& attrName)
{
    DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
    if (supportedAttributes.isEmpty()) {
        supportedAttributes.add(SVGNames::xAttr);
        supportedAttributes.add(SVGNames::yAttr);
        supportedAttributes.add(SVGNames::dxAttr);
        supportedAttributes.add(SVGNames::dyAttr);
        supportedAttributes.add(SVGNames::rotateAttr);
    }
    return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
}

void SVGTextPositioningElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
{
    if (!isSupportedAttribute(name)) {
        SVGTextContentElement::parseAttribute(name, value);
        return;
    }

    SVGParsingError parseError = NoError;

    if (name == SVGNames::xAttr)
        m_x->setBaseValueAsString(value, parseError);
    else if (name == SVGNames::yAttr)
        m_y->setBaseValueAsString(value, parseError);
    else if (name == SVGNames::dxAttr)
        m_dx->setBaseValueAsString(value, parseError);
    else if (name == SVGNames::dyAttr)
        m_dy->setBaseValueAsString(value, parseError);
    else if (name == SVGNames::rotateAttr)
        m_rotate->setBaseValueAsString(value, parseError);
    else
        ASSERT_NOT_REACHED();

    reportAttributeParsingError(parseError, name, value);
}

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

    SVGElement::InvalidationGuard invalidationGuard(this);

    bool updateRelativeLengths = attrName == SVGNames::xAttr
                              || attrName == SVGNames::yAttr
                              || attrName == SVGNames::dxAttr
                              || attrName == SVGNames::dyAttr;

    if (updateRelativeLengths)
        updateRelativeLengthsInformation();

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

    if (updateRelativeLengths || attrName == SVGNames::rotateAttr) {
        if (RenderSVGText* textRenderer = RenderSVGText::locateRenderSVGTextAncestor(renderer))
            textRenderer->setNeedsPositioningValuesUpdate();
        RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
        return;
    }

    ASSERT_NOT_REACHED();
}

SVGTextPositioningElement* SVGTextPositioningElement::elementFromRenderer(RenderObject* renderer)
{
    if (!renderer)
        return 0;

    if (!renderer->isSVGText() && !renderer->isSVGInline())
        return 0;

    Node* node = renderer->node();
    ASSERT(node);
    ASSERT(node->isSVGElement());

    return isSVGTextPositioningElement(*node) ? toSVGTextPositioningElement(node) : 0;
}

}