ladybird/Libraries/LibWeb/DOM/NonElementParentNode.h

/*
 * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <AK/Forward.h>
#include <LibWeb/DOM/AttributeNames.h>
#include <LibWeb/Forward.h>
#include <LibWeb/TreeNode.h>

namespace Web {

template<typename NodeType>
class NonElementParentNode {
public:
    const Element* get_element_by_id(const FlyString& id) const
    {
        const Element* found_element = nullptr;
        static_cast<const NodeType*>(this)->template for_each_in_subtree_of_type<Element>([&](auto& element) {
            if (element.attribute(HTML::AttributeNames::id) == id) {
                found_element = &element;
                return IterationDecision::Break;
            }
            return IterationDecision::Continue;
        });
        return found_element;
    }
    Element* get_element_by_id(const FlyString& id)
    {
        return const_cast<Element*>(const_cast<const NonElementParentNode*>(this)->get_element_by_id(id));
    }

protected:
    NonElementParentNode() { }
};

}