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79 lines
2.7 KiB
C++
79 lines
2.7 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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#ifndef SKY_ENGINE_CORE_CSS_MEDIAQUERYMATCHER_H_
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#define SKY_ENGINE_CORE_CSS_MEDIAQUERYMATCHER_H_
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#include "sky/engine/platform/heap/Handle.h"
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#include "sky/engine/wtf/Forward.h"
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#include "sky/engine/wtf/LinkedHashSet.h"
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#include "sky/engine/wtf/ListHashSet.h"
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#include "sky/engine/wtf/RefCounted.h"
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namespace blink {
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class Document;
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class MediaQueryList;
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class MediaQueryListListener;
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class MediaQueryEvaluator;
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class MediaQuerySet;
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// MediaQueryMatcher class is responsible for keeping a vector of pairs
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// MediaQueryList x MediaQueryListListener. It is responsible for evaluating the queries
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// whenever it is needed and to call the listeners if the corresponding query has changed.
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// The listeners must be called in the very same order in which they have been added.
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class MediaQueryMatcher final : public RefCounted<MediaQueryMatcher> {
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DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryMatcher)
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public:
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static PassRefPtr<MediaQueryMatcher> create(Document&);
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void documentDetached();
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void addMediaQueryList(MediaQueryList*);
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void removeMediaQueryList(MediaQueryList*);
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void addViewportListener(MediaQueryListListener*);
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void removeViewportListener(MediaQueryListListener*);
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PassRefPtr<MediaQueryList> matchMedia(const String&);
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void mediaFeaturesChanged();
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void viewportChanged();
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bool evaluate(const MediaQuerySet*);
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private:
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explicit MediaQueryMatcher(Document&);
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PassOwnPtr<MediaQueryEvaluator> createEvaluator() const;
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RawPtr<Document> m_document;
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OwnPtr<MediaQueryEvaluator> m_evaluator;
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typedef LinkedHashSet<RawPtr<MediaQueryList> > MediaQueryListSet;
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MediaQueryListSet m_mediaLists;
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typedef LinkedHashSet<RawPtr<MediaQueryListListener> > ViewportListenerSet;
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ViewportListenerSet m_viewportListeners;
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};
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}
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#endif // SKY_ENGINE_CORE_CSS_MEDIAQUERYMATCHER_H_
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