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/*
* 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 "MediaQueryMatcher.h"
#include "Document.h"
#include "EventNames.h"
#include "LocalFrame.h"
#include "LocalFrameView.h"
#include "Logging.h"
#include "MediaQueryEvaluator.h"
#include "MediaQueryList.h"
#include "MediaQueryParser.h"
#include "MediaQueryParserContext.h"
#include "NodeRenderStyle.h"
#include "RenderElement.h"
#include "ResolvedStyle.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
MediaQueryMatcher::MediaQueryMatcher(Document& document)
: m_document(document)
{
}
MediaQueryMatcher::~MediaQueryMatcher() = default;
void MediaQueryMatcher::documentDestroyed()
{
m_document = nullptr;
auto mediaQueryLists = std::exchange(m_mediaQueryLists, { });
for (auto& mediaQueryList : mediaQueryLists) {
if (mediaQueryList)
mediaQueryList->detachFromMatcher();
}
}
AtomString MediaQueryMatcher::mediaType() const
{
if (!m_document || !m_document->frame() || !m_document->frame()->view())
return nullAtom();
return m_document->frame()->view()->mediaType();
}
std::unique_ptr<RenderStyle> MediaQueryMatcher::documentElementUserAgentStyle() const
{
if (!m_document || !m_document->frame())
return nullptr;
auto* documentElement = m_document->documentElement();
if (!documentElement)
return nullptr;
return m_document->styleScope().resolver().styleForElement(*documentElement, { m_document->renderStyle() }, RuleMatchingBehavior::MatchOnlyUserAgentRules).style;
}
bool MediaQueryMatcher::evaluate(const MQ::MediaQueryList& queries)
{
auto style = documentElementUserAgentStyle();
if (!style)
return false;
return MQ::MediaQueryEvaluator { mediaType(), *m_document, style.get() }.evaluate(queries);
}
void MediaQueryMatcher::addMediaQueryList(MediaQueryList& list)
{
ASSERT(!m_mediaQueryLists.contains(&list));
m_mediaQueryLists.append(list);
}
void MediaQueryMatcher::removeMediaQueryList(MediaQueryList& list)
{
m_mediaQueryLists.removeFirst(&list);
}
RefPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query)
{
if (!m_document)
return nullptr;
auto queries = MQ::MediaQueryParser::parse(query, MediaQueryParserContext(*m_document));
bool matches = evaluate(queries);
return MediaQueryList::create(*m_document, *this, WTFMove(queries), matches);
}
void MediaQueryMatcher::evaluateAll(EventMode eventMode)
{
ASSERT(m_document);
++m_evaluationRound;
auto style = documentElementUserAgentStyle();
if (!style)
return;
LOG_WITH_STREAM(MediaQueries, stream << "MediaQueryMatcher::styleResolverChanged " << m_document->url());
MQ::MediaQueryEvaluator evaluator { mediaType(), *m_document, style.get() };
auto mediaQueryLists = m_mediaQueryLists;
for (auto& list : mediaQueryLists) {
if (RefPtr protectedList = list.get()) {
protectedList->evaluate(evaluator, eventMode);
if (!m_document)
break;
}
}
}
} // namespace WebCore
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