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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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28 #include "platform/heap/Handle.h" | 28 #include "platform/heap/Handle.h" |
29 #include "wtf/Forward.h" | 29 #include "wtf/Forward.h" |
30 | 30 |
31 namespace blink { | 31 namespace blink { |
32 | 32 |
33 class ExecutionContext; | 33 class ExecutionContext; |
34 class MediaQueryListListener; | 34 class MediaQueryListListener; |
35 class MediaQueryMatcher; | 35 class MediaQueryMatcher; |
36 class MediaQuerySet; | 36 class MediaQuerySet; |
37 | 37 |
38 // MediaQueryList interface is specified at http://dev.w3.org/csswg/cssom-view/#
the-mediaquerylist-interface | 38 // MediaQueryList interface is specified at |
39 // The objects of this class are returned by window.matchMedia. They may be used
to | 39 // http://dev.w3.org/csswg/cssom-view/#the-mediaquerylist-interface |
40 // retrieve the current value of the given media query and to add/remove listene
rs that | 40 // The objects of this class are returned by window.matchMedia. They may be used |
41 // will be called whenever the value of the query changes. | 41 // to retrieve the current value of the given media query and to add/remove |
| 42 // listeners that will be called whenever the value of the query changes. |
42 | 43 |
43 class CORE_EXPORT MediaQueryList final : public EventTargetWithInlineData, | 44 class CORE_EXPORT MediaQueryList final : public EventTargetWithInlineData, |
44 public ActiveScriptWrappable, | 45 public ActiveScriptWrappable, |
45 public ActiveDOMObject { | 46 public ActiveDOMObject { |
46 DEFINE_WRAPPERTYPEINFO(); | 47 DEFINE_WRAPPERTYPEINFO(); |
47 USING_GARBAGE_COLLECTED_MIXIN(MediaQueryList); | 48 USING_GARBAGE_COLLECTED_MIXIN(MediaQueryList); |
48 WTF_MAKE_NONCOPYABLE(MediaQueryList); | 49 WTF_MAKE_NONCOPYABLE(MediaQueryList); |
49 | 50 |
50 public: | 51 public: |
51 static MediaQueryList* create(ExecutionContext*, | 52 static MediaQueryList* create(ExecutionContext*, |
52 MediaQueryMatcher*, | 53 MediaQueryMatcher*, |
53 MediaQuerySet*); | 54 MediaQuerySet*); |
54 ~MediaQueryList() override; | 55 ~MediaQueryList() override; |
55 | 56 |
56 String media() const; | 57 String media() const; |
57 bool matches(); | 58 bool matches(); |
58 | 59 |
59 DEFINE_ATTRIBUTE_EVENT_LISTENER(change); | 60 DEFINE_ATTRIBUTE_EVENT_LISTENER(change); |
60 | 61 |
61 // These two functions are provided for compatibility with JS code | 62 // These two functions are provided for compatibility with JS code |
62 // written before the change listener became a DOM event. | 63 // written before the change listener became a DOM event. |
63 void addDeprecatedListener(EventListener*); | 64 void addDeprecatedListener(EventListener*); |
64 void removeDeprecatedListener(EventListener*); | 65 void removeDeprecatedListener(EventListener*); |
65 | 66 |
66 // C++ code can use these functions to listen to changes instead of having to
use DOM event listeners. | 67 // C++ code can use these functions to listen to changes instead of having to |
| 68 // use DOM event listeners. |
67 void addListener(MediaQueryListListener*); | 69 void addListener(MediaQueryListListener*); |
68 void removeListener(MediaQueryListListener*); | 70 void removeListener(MediaQueryListListener*); |
69 | 71 |
70 // Will return true if a DOM event should be scheduled. | 72 // Will return true if a DOM event should be scheduled. |
71 bool mediaFeaturesChanged( | 73 bool mediaFeaturesChanged( |
72 HeapVector<Member<MediaQueryListListener>>* listenersToNotify); | 74 HeapVector<Member<MediaQueryListListener>>* listenersToNotify); |
73 | 75 |
74 DECLARE_VIRTUAL_TRACE(); | 76 DECLARE_VIRTUAL_TRACE(); |
75 | 77 |
76 // From ScriptWrappable | 78 // From ScriptWrappable |
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91 Member<MediaQuerySet> m_media; | 93 Member<MediaQuerySet> m_media; |
92 using ListenerList = HeapListHashSet<Member<MediaQueryListListener>>; | 94 using ListenerList = HeapListHashSet<Member<MediaQueryListListener>>; |
93 ListenerList m_listeners; | 95 ListenerList m_listeners; |
94 bool m_matchesDirty; | 96 bool m_matchesDirty; |
95 bool m_matches; | 97 bool m_matches; |
96 }; | 98 }; |
97 | 99 |
98 } // namespace blink | 100 } // namespace blink |
99 | 101 |
100 #endif // MediaQueryList_h | 102 #endif // MediaQueryList_h |
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