2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
20 #ifndef MediaQueryMatcher_h
21 #define MediaQueryMatcher_h
23 #include "platform/heap/Handle.h"
24 #include "wtf/Forward.h"
25 #include "wtf/RefCounted.h"
31 class MediaQueryListListener;
32 class MediaQueryEvaluator;
35 // MediaQueryMatcher class is responsible for keeping a vector of pairs
36 // MediaQueryList x MediaQueryListListener. It is responsible for evaluating the queries
37 // whenever it is needed and to call the listeners if the corresponding query has changed.
38 // The listeners must be called in the very same order in which they have been added.
40 class MediaQueryMatcher final : public RefCountedWillBeGarbageCollectedFinalized<MediaQueryMatcher> {
41 DECLARE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(MediaQueryMatcher)
43 static PassRefPtrWillBeRawPtr<MediaQueryMatcher> create(Document&);
44 void documentDetached();
46 void addMediaQueryList(MediaQueryList*);
47 void removeMediaQueryList(MediaQueryList*);
49 void addViewportListener(PassRefPtrWillBeRawPtr<MediaQueryListListener>);
50 void removeViewportListener(PassRefPtrWillBeRawPtr<MediaQueryListListener>);
52 PassRefPtrWillBeRawPtr<MediaQueryList> matchMedia(const String&);
54 void mediaFeaturesChanged();
55 void viewportChanged();
56 bool evaluate(const MediaQuerySet*);
61 explicit MediaQueryMatcher(Document&);
63 PassOwnPtr<MediaQueryEvaluator> createEvaluator() const;
65 RawPtrWillBeMember<Document> m_document;
66 OwnPtr<MediaQueryEvaluator> m_evaluator;
68 typedef WillBeHeapLinkedHashSet<RawPtrWillBeWeakMember<MediaQueryList> > MediaQueryListSet;
69 MediaQueryListSet m_mediaLists;
71 typedef WillBeHeapLinkedHashSet<RefPtrWillBeMember<MediaQueryListListener> > ViewportListenerSet;
72 ViewportListenerSet m_viewportListeners;
77 #endif // MediaQueryMatcher_h