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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) | 2 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies) |
| 3 * | 3 * |
| 4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
| 5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
| 6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
| 7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
| 8 * | 8 * |
| 9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 35 class MediaQuerySet; | 35 class MediaQuerySet; |
| 36 | 36 |
| 37 // MediaQueryMatcher class is responsible for keeping a vector of pairs | 37 // MediaQueryMatcher class is responsible for keeping a vector of pairs |
| 38 // MediaQueryList x MediaQueryListListener. It is responsible for evaluating the
queries | 38 // MediaQueryList x MediaQueryListListener. It is responsible for evaluating the
queries |
| 39 // whenever it is needed and to call the listeners if the corresponding query ha
s changed. | 39 // whenever it is needed and to call the listeners if the corresponding query ha
s changed. |
| 40 // The listeners must be called in the very same order in which they have been a
dded. | 40 // The listeners must be called in the very same order in which they have been a
dded. |
| 41 | 41 |
| 42 class MediaQueryMatcher FINAL : public RefCountedWillBeGarbageCollected<MediaQue
ryMatcher> { | 42 class MediaQueryMatcher FINAL : public RefCountedWillBeGarbageCollected<MediaQue
ryMatcher> { |
| 43 public: | 43 public: |
| 44 static PassRefPtrWillBeRawPtr<MediaQueryMatcher> create(Document* document)
{ return adoptRefWillBeNoop(new MediaQueryMatcher(document)); } | 44 static PassRefPtrWillBeRawPtr<MediaQueryMatcher> create(Document* document)
{ return adoptRefWillBeNoop(new MediaQueryMatcher(document)); } |
| 45 #if !ENABLE(OILPAN) |
| 45 ~MediaQueryMatcher(); | 46 ~MediaQueryMatcher(); |
| 47 #endif |
| 46 void documentDestroyed(); | 48 void documentDestroyed(); |
| 47 | 49 |
| 48 void addListener(PassRefPtrWillBeRawPtr<MediaQueryListListener>, PassRefPtrW
illBeRawPtr<MediaQueryList>); | 50 void addListener(PassRefPtrWillBeRawPtr<MediaQueryListListener>, PassRefPtrW
illBeRawPtr<MediaQueryList>); |
| 49 void removeListener(MediaQueryListListener*, MediaQueryList*); | 51 void removeListener(MediaQueryListListener*, MediaQueryList*); |
| 50 | 52 |
| 51 PassRefPtrWillBeRawPtr<MediaQueryList> matchMedia(const String&); | 53 PassRefPtrWillBeRawPtr<MediaQueryList> matchMedia(const String&); |
| 52 | 54 |
| 53 unsigned evaluationRound() const { return m_evaluationRound; } | 55 unsigned evaluationRound() const { return m_evaluationRound; } |
| 54 void styleResolverChanged(); | 56 void styleResolverChanged(); |
| 55 bool evaluate(const MediaQuerySet*); | 57 bool evaluate(const MediaQuerySet*); |
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| 82 | 84 |
| 83 // This value is incremented at style selector changes. | 85 // This value is incremented at style selector changes. |
| 84 // It is used to avoid evaluating queries more then once and to make sure | 86 // It is used to avoid evaluating queries more then once and to make sure |
| 85 // that a media query result change is notified exactly once. | 87 // that a media query result change is notified exactly once. |
| 86 unsigned m_evaluationRound; | 88 unsigned m_evaluationRound; |
| 87 }; | 89 }; |
| 88 | 90 |
| 89 } | 91 } |
| 90 | 92 |
| 91 #endif // MediaQueryMatcher_h | 93 #endif // MediaQueryMatcher_h |
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