Source/WebCore/svg/SVGTextElement.cpp

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

#include "RenderSVGResource.h"
#include "RenderSVGText.h"
#include "SVGNames.h"
#include "SVGRenderStyle.h"
#include "SVGTSpanElement.h"
#include <wtf/IsoMallocInlines.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(SVGTextElement);

inline SVGTextElement::SVGTextElement(const QualifiedName& tagName, Document& document)
    : SVGTextPositioningElement(tagName, document)
{
    ASSERT(hasTagName(SVGNames::textTag));
}

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

// We override SVGGraphics::animatedLocalTransform() so that the transform-origin
// is not taken into account.
AffineTransform SVGTextElement::animatedLocalTransform() const
{
    AffineTransform matrix;
    auto* style = renderer() ? &renderer()->style() : nullptr;

    // if CSS property was set, use that, otherwise fallback to attribute (if set)
    if (style && style->hasTransform()) {
        TransformationMatrix t;
        // For now, the transform-origin is not taken into account
        // Also, any percentage values will not be taken into account
        style->applyTransform(t, FloatRect(0, 0, 0, 0), RenderStyle::ExcludeTransformOrigin);
        // Flatten any 3D transform
        matrix = t.toAffineTransform();
    } else
        transform().concatenate(matrix);

    const AffineTransform* transform = const_cast<SVGTextElement*>(this)->supplementalTransform();
    if (transform)
        return *transform * matrix;
    return matrix;
}

RenderPtr<RenderElement> SVGTextElement::createElementRenderer(RenderStyle&& style, const RenderTreePosition&)
{
    return createRenderer<RenderSVGText>(*this, WTFMove(style));
}

bool SVGTextElement::childShouldCreateRenderer(const Node& child) const
{
    if (child.isTextNode()
        || child.hasTagName(SVGNames::aTag)
#if ENABLE(SVG_FONTS)
        || child.hasTagName(SVGNames::altGlyphTag)
#endif
        || child.hasTagName(SVGNames::textPathTag)
        || child.hasTagName(SVGNames::trefTag)
        || child.hasTagName(SVGNames::tspanTag))
        return true;

    return false;
}

}