/*
 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
 * Copyright (C) 2022 Apple Inc. All rights reserved.
 *
 * 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 "SVGFEMergeElement.h"

#include "ElementChildIterator.h"
#include "FEMerge.h"
#include "SVGElementTypeHelpers.h"
#include "SVGFEMergeNodeElement.h"
#include "SVGNames.h"
#include <wtf/IsoMallocInlines.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(SVGFEMergeElement);

inline SVGFEMergeElement::SVGFEMergeElement(const QualifiedName& tagName, Document& document)
    : SVGFilterPrimitiveStandardAttributes(tagName, document, makeUniqueRef<PropertyRegistry>(*this))
{
    ASSERT(hasTagName(SVGNames::feMergeTag));
}

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

void SVGFEMergeElement::childrenChanged(const ChildChange& change)
{
    SVGFilterPrimitiveStandardAttributes::childrenChanged(change);
    InstanceInvalidationGuard guard(*this);
    markFilterEffectForRebuild();
}

Vector<AtomString> SVGFEMergeElement::filterEffectInputsNames() const
{
    Vector<AtomString> inputsNames;
    for (auto& mergeNode : childrenOfType<SVGFEMergeNodeElement>(*this))
        inputsNames.append(mergeNode.in1());
    return inputsNames;
}

RefPtr<FilterEffect> SVGFEMergeElement::createFilterEffect(const FilterEffectVector& inputs, const GraphicsContext&) const
{
    return FEMerge::create(inputs.size());
}

} // namespace WebCore
