138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/*
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "MediaQueryMatcher.h"
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#include "Document.h"
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#include "EventNames.h"
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#include "Frame.h"
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#include "FrameView.h"
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#include "Logging.h"
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#include "MediaList.h"
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#include "MediaQueryEvaluator.h"
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#include "MediaQueryList.h"
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#include "MediaQueryListEvent.h"
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#include "MediaQueryParserContext.h"
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#include "NodeRenderStyle.h"
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#include "RenderElement.h"
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#include "StyleResolver.h"
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#include "StyleScope.h"
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#include <wtf/text/TextStream.h>
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namespace WebCore {
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MediaQueryMatcher::MediaQueryMatcher(Document& document)
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: m_document(makeWeakPtr(document))
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{
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}
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MediaQueryMatcher::~MediaQueryMatcher() = default;
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void MediaQueryMatcher::documentDestroyed()
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{
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m_document = nullptr;
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auto mediaQueryLists = std::exchange(m_mediaQueryLists, { });
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for (auto& mediaQueryList : mediaQueryLists) {
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if (mediaQueryList)
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mediaQueryList->detachFromMatcher();
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}
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}
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String MediaQueryMatcher::mediaType() const
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{
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if (!m_document || !m_document->frame() || !m_document->frame()->view())
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return String();
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return m_document->frame()->view()->mediaType();
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}
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std::unique_ptr<RenderStyle> MediaQueryMatcher::documentElementUserAgentStyle() const
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{
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if (!m_document || !m_document->frame())
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return nullptr;
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auto* documentElement = m_document->documentElement();
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if (!documentElement)
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return nullptr;
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return m_document->styleScope().resolver().styleForElement(*documentElement, m_document->renderStyle(), nullptr, RuleMatchingBehavior::MatchOnlyUserAgentRules).renderStyle;
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}
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bool MediaQueryMatcher::evaluate(const MediaQuerySet& media)
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{
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auto style = documentElementUserAgentStyle();
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if (!style)
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return false;
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return MediaQueryEvaluator { mediaType(), *m_document, style.get() }.evaluate(media);
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}
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void MediaQueryMatcher::addMediaQueryList(MediaQueryList& list)
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{
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ASSERT(!m_mediaQueryLists.contains(&list));
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m_mediaQueryLists.append(makeWeakPtr(&list));
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}
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void MediaQueryMatcher::removeMediaQueryList(MediaQueryList& list)
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{
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m_mediaQueryLists.removeFirst(&list);
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}
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RefPtr<MediaQueryList> MediaQueryMatcher::matchMedia(const String& query)
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{
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if (!m_document)
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return nullptr;
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auto media = MediaQuerySet::create(query, MediaQueryParserContext(*m_document));
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reportMediaQueryWarningIfNeeded(m_document.get(), media.ptr());
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bool matches = evaluate(media.get());
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return MediaQueryList::create(*m_document, *this, WTFMove(media), matches);
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}
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void MediaQueryMatcher::evaluateAll()
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{
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ASSERT(m_document);
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++m_evaluationRound;
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auto style = documentElementUserAgentStyle();
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if (!style)
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return;
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LOG_WITH_STREAM(MediaQueries, stream << "MediaQueryMatcher::styleResolverChanged " << m_document->url());
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MediaQueryEvaluator evaluator { mediaType(), *m_document, style.get() };
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auto mediaQueryLists = m_mediaQueryLists;
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for (auto& list : mediaQueryLists) {
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if (!list)
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continue;
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bool notify;
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list->evaluate(evaluator, notify);
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if (notify) {
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if (m_document && m_document->quirks().shouldSilenceMediaQueryListChangeEvents())
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continue;
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list->dispatchEvent(MediaQueryListEvent::create(eventNames().changeEvent, list->media(), list->matches()));
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}
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}
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}
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} // namespace WebCore
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