1c829e0417
Currently, `evaluate()` recalculates whether the MediaQuery matches or not, and stores it in `m_matches`, which users can query using `matches()`. This allows us to know when the match-state changes, which is required to fire MediaQueryList's change event.
87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/CSS/MediaList.h>
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#include <LibWeb/CSS/Parser/Parser.h>
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namespace Web::CSS {
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MediaList::MediaList(NonnullRefPtrVector<MediaQuery>&& media)
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: m_media(move(media))
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{
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}
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MediaList::~MediaList()
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{
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}
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// https://www.w3.org/TR/cssom-1/#dom-medialist-mediatext
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String MediaList::media_text() const
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{
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StringBuilder builder;
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builder.join(", ", m_media);
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return builder.to_string();
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}
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// https://www.w3.org/TR/cssom-1/#dom-medialist-mediatext
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void MediaList::set_media_text(String const& text)
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{
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m_media.clear();
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if (text.is_empty())
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return;
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m_media = parse_media_query_list({}, text);
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}
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// https://www.w3.org/TR/cssom-1/#dom-medialist-item
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Optional<String> MediaList::item(size_t index) const
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{
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if (index >= length())
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return {};
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return m_media[index].to_string();
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}
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// https://www.w3.org/TR/cssom-1/#dom-medialist-appendmedium
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void MediaList::append_medium(String medium)
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{
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auto m = parse_media_query({}, medium);
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if (!m)
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return;
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if (m_media.contains_slow(*m))
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return;
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m_media.append(m.release_nonnull());
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}
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// https://www.w3.org/TR/cssom-1/#dom-medialist-deletemedium
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void MediaList::delete_medium(String medium)
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{
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auto m = parse_media_query({}, medium);
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if (!m)
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return;
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m_media.remove_all_matching([&](auto& existing) -> bool {
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return m->to_string() == existing->to_string();
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});
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// FIXME: If nothing was removed, then throw a NotFoundError exception.
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}
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bool MediaList::evaluate(DOM::Window const& window)
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{
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for (auto& media : m_media)
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media.evaluate(window);
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return matches();
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}
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bool MediaList::matches() const
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{
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for (auto& media : m_media) {
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if (media.matches())
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return true;
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}
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return false;
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}
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}
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