ladybird/Libraries/LibWeb/CSS/Selector.cpp

/*
 * Copyright (c) 2018-2020, 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.
 */

#include <LibWeb/CSS/Selector.h>

namespace Web {

Selector::Selector(Vector<ComplexSelector>&& component_lists)
    : m_complex_selectors(move(component_lists))
{
}

Selector::~Selector()
{
}

u32 Selector::specificity() const
{
    unsigned ids = 0;
    unsigned tag_names = 0;
    unsigned classes = 0;

    for (auto& list : m_complex_selectors) {
        for (auto& simple_selector : list.compound_selector) {
            switch (simple_selector.type) {
            case SimpleSelector::Type::Id:
                ++ids;
                break;
            case SimpleSelector::Type::Class:
                ++classes;
                break;
            case SimpleSelector::Type::TagName:
                ++tag_names;
                break;
            default:
                break;
            }
        }
    }

    return ids * 0x10000 + classes * 0x100 + tag_names;
}

}