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