blob: 9e556ea3347ae2bd56b943fdbd783b0e73665e9a [file] [log] [blame]
/*
* 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 "Frame.h"
#include "FrameView.h"
#include "Logging.h"
#include "MediaList.h"
#include "MediaQueryEvaluator.h"
#include "MediaQueryList.h"
#include "MediaQueryListEvent.h"
#include "MediaQueryParserContext.h"
#include "NodeRenderStyle.h"
#include "RenderElement.h"
#include "StyleResolver.h"
#include "StyleScope.h"
#include <wtf/text/TextStream.h>
namespace WebCore {
MediaQueryMatcher::MediaQueryMatcher(Document& document)
: m_document(makeWeakPtr(document))
{
}
MediaQueryMatcher::~MediaQueryMatcher() = default;
void MediaQueryMatcher::documentDestroyed()
{
m_document = nullptr;
auto mediaQueryLists = std::exchange(m_mediaQueryLists, { });
for (auto& mediaQueryList : mediaQueryLists) {
if (mediaQueryList)
mediaQueryList->detachFromMatcher();
}
}
String MediaQueryMatcher::mediaType() const
{
if (!m_document || !m_document->frame() || !m_document->frame()->view())
return String();
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(), nullptr, RuleMatchingBehavior::MatchOnlyUserAgentRules).renderStyle;
}
bool MediaQueryMatcher::evaluate(const MediaQuerySet& media)
{
auto style = documentElementUserAgentStyle();
if (!style)
return false;
return MediaQueryEvaluator { mediaType(), *m_document, style.get() }.evaluate(media);
}
void MediaQueryMatcher::addMediaQueryList(MediaQueryList& list)
{
ASSERT(!m_mediaQueryLists.contains(&list));
m_mediaQueryLists.append(makeWeakPtr(&list));
}
void MediaQueryMatcher::removeMediaQueryList(MediaQueryList& list)
{
m_mediaQueryLists.removeFirst(&list);
}
RefPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query)
{
if (!m_document)
return nullptr;
auto media = MediaQuerySet::create(query, MediaQueryParserContext(*m_document));
reportMediaQueryWarningIfNeeded(m_document.get(), media.ptr());
bool matches = evaluate(media.get());
return MediaQueryList::create(*m_document, *this, WTFMove(media), matches);
}
void MediaQueryMatcher::evaluateAll()
{
ASSERT(m_document);
++m_evaluationRound;
auto style = documentElementUserAgentStyle();
if (!style)
return;
LOG_WITH_STREAM(MediaQueries, stream << "MediaQueryMatcher::styleResolverChanged " << m_document->url());
MediaQueryEvaluator evaluator { mediaType(), *m_document, style.get() };
auto mediaQueryLists = m_mediaQueryLists;
for (auto& list : mediaQueryLists) {
if (!list)
continue;
bool notify;
list->evaluate(evaluator, notify);
if (notify)
list->dispatchEvent(MediaQueryListEvent::create(eventNames().changeEvent, list->media(), list->matches()));
}
}
} // namespace WebCore