| /* |
| * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| * |
| * 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 "MediaQueryList.h" |
| |
| #include "MediaList.h" |
| #include "MediaQueryEvaluator.h" |
| #include "MediaQueryListListener.h" |
| #include "MediaQueryMatcher.h" |
| |
| namespace WebCore { |
| |
| inline MediaQueryList::MediaQueryList(MediaQueryMatcher& matcher, Ref<MediaQuerySet>&& media, bool matches) |
| : m_matcher(matcher) |
| , m_media(WTFMove(media)) |
| , m_evaluationRound(m_matcher->evaluationRound()) |
| , m_changeRound(m_evaluationRound - 1) // Any value that is not the same as m_evaluationRound would do. |
| , m_matches(matches) |
| { |
| } |
| |
| Ref<MediaQueryList> MediaQueryList::create(MediaQueryMatcher& matcher, Ref<MediaQuerySet>&& media, bool matches) |
| { |
| return adoptRef(*new MediaQueryList(matcher, WTFMove(media), matches)); |
| } |
| |
| MediaQueryList::~MediaQueryList() = default; |
| |
| String MediaQueryList::media() const |
| { |
| return m_media->mediaText(); |
| } |
| |
| void MediaQueryList::addListener(RefPtr<MediaQueryListListener>&& listener) |
| { |
| if (!listener) |
| return; |
| |
| m_matcher->addListener(listener.releaseNonNull(), *this); |
| } |
| |
| void MediaQueryList::removeListener(RefPtr<MediaQueryListListener>&& listener) |
| { |
| if (!listener) |
| return; |
| |
| m_matcher->removeListener(*listener, *this); |
| } |
| |
| void MediaQueryList::evaluate(MediaQueryEvaluator& evaluator, bool& notificationNeeded) |
| { |
| if (m_evaluationRound != m_matcher->evaluationRound()) |
| setMatches(evaluator.evaluate(m_media.get())); |
| notificationNeeded = m_changeRound == m_matcher->evaluationRound(); |
| } |
| |
| void MediaQueryList::setMatches(bool newValue) |
| { |
| m_evaluationRound = m_matcher->evaluationRound(); |
| |
| if (newValue == m_matches) |
| return; |
| |
| m_matches = newValue; |
| m_changeRound = m_evaluationRound; |
| } |
| |
| bool MediaQueryList::matches() |
| { |
| if (m_evaluationRound != m_matcher->evaluationRound()) |
| setMatches(m_matcher->evaluate(m_media.get())); |
| return m_matches; |
| } |
| |
| } |