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1 /** | 1 /** |
2 * A custom KeyboardEvent that attempts to eliminate cross-browser | 2 * A custom KeyboardEvent that attempts to eliminate cross-browser |
3 * inconsistencies, and also provide both keyCode and charCode information | 3 * inconsistencies, and also provide both keyCode and charCode information |
4 * for all key events (when such information can be determined). | 4 * for all key events (when such information can be determined). |
5 * | 5 * |
6 * KeyEvent tries to provide a higher level, more polished keyboard event | 6 * KeyEvent tries to provide a higher level, more polished keyboard event |
7 * information on top of the "raw" [KeyboardEvent]. | 7 * information on top of the "raw" [KeyboardEvent]. |
8 * | 8 * |
9 * This class is very much a work in progress, and we'd love to get information | 9 * This class is very much a work in progress, and we'd love to get information |
10 * on how we can make this class work with as many international keyboards as | 10 * on how we can make this class work with as many international keyboards as |
11 * possible. Bugs welcome! | 11 * possible. Bugs welcome! |
12 */ | 12 */ |
13 part of html; | 13 part of html; |
14 | 14 |
| 15 @Experimental() |
15 class KeyEvent extends _WrappedEvent implements KeyboardEvent { | 16 class KeyEvent extends _WrappedEvent implements KeyboardEvent { |
16 /** The parent KeyboardEvent that this KeyEvent is wrapping and "fixing". */ | 17 /** The parent KeyboardEvent that this KeyEvent is wrapping and "fixing". */ |
17 KeyboardEvent _parent; | 18 KeyboardEvent _parent; |
18 | 19 |
19 /** The "fixed" value of whether the alt key is being pressed. */ | 20 /** The "fixed" value of whether the alt key is being pressed. */ |
20 bool _shadowAltKey; | 21 bool _shadowAltKey; |
21 | 22 |
22 /** Caculated value of what the estimated charCode is for this event. */ | 23 /** Caculated value of what the estimated charCode is for this event. */ |
23 int _shadowCharCode; | 24 int _shadowCharCode; |
24 | 25 |
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39 | 40 |
40 /** Accessor to the underlying keyCode value is the parent event. */ | 41 /** Accessor to the underlying keyCode value is the parent event. */ |
41 int get _realKeyCode => _parent.keyCode; | 42 int get _realKeyCode => _parent.keyCode; |
42 | 43 |
43 /** Accessor to the underlying charCode value is the parent event. */ | 44 /** Accessor to the underlying charCode value is the parent event. */ |
44 int get _realCharCode => _parent.charCode; | 45 int get _realCharCode => _parent.charCode; |
45 | 46 |
46 /** Accessor to the underlying altKey value is the parent event. */ | 47 /** Accessor to the underlying altKey value is the parent event. */ |
47 bool get _realAltKey => _parent.altKey; | 48 bool get _realAltKey => _parent.altKey; |
48 | 49 |
| 50 /** Shadows on top of the parent's currentTarget. */ |
| 51 EventTarget _currentTarget; |
| 52 |
49 /** Construct a KeyEvent with [parent] as the event we're emulating. */ | 53 /** Construct a KeyEvent with [parent] as the event we're emulating. */ |
50 KeyEvent(KeyboardEvent parent): super(parent) { | 54 KeyEvent.wrap(KeyboardEvent parent): super(parent) { |
51 _parent = parent; | 55 _parent = parent; |
52 _shadowAltKey = _realAltKey; | 56 _shadowAltKey = _realAltKey; |
53 _shadowCharCode = _realCharCode; | 57 _shadowCharCode = _realCharCode; |
54 _shadowKeyCode = _realKeyCode; | 58 _shadowKeyCode = _realKeyCode; |
| 59 _currentTarget = _parent.currentTarget == null? window : |
| 60 _parent.currentTarget; |
55 } | 61 } |
56 | 62 |
| 63 /** Programmatically create a new KeyEvent (and KeyboardEvent). */ |
| 64 KeyEvent(String type, |
| 65 {Window view, bool canBubble: true, bool cancelable: true, int keyCode: 0, |
| 66 int charCode: 0, int keyLocation: 1, bool ctrlKey: false, |
| 67 bool altKey: false, bool shiftKey: false, bool metaKey: false, |
| 68 bool altGraphKey: false, EventTarget currentTarget}) { |
| 69 _parent = new KeyboardEvent(type, view: view, canBubble: canBubble, |
| 70 cancelable: cancelable, keyLocation: keyLocation, ctrlKey: ctrlKey, |
| 71 altKey: altKey, shiftKey: shiftKey, metaKey: metaKey, altGraphKey: |
| 72 altGraphKey); |
| 73 _shadowAltKey = altKey; |
| 74 _shadowCharCode = charCode; |
| 75 _shadowKeyCode = keyCode; |
| 76 _currentTarget = currentTarget == null ? window : currentTarget; |
| 77 } |
| 78 |
57 /** Accessor to provide a stream of KeyEvents on the desired target. */ | 79 /** Accessor to provide a stream of KeyEvents on the desired target. */ |
58 static EventStreamProvider<KeyEvent> keyDownEvent = | 80 static EventStreamProvider<KeyEvent> keyDownEvent = |
59 new _KeyboardEventHandler('keydown'); | 81 new _KeyboardEventHandler('keydown'); |
60 /** Accessor to provide a stream of KeyEvents on the desired target. */ | 82 /** Accessor to provide a stream of KeyEvents on the desired target. */ |
61 static EventStreamProvider<KeyEvent> keyUpEvent = | 83 static EventStreamProvider<KeyEvent> keyUpEvent = |
62 new _KeyboardEventHandler('keyup'); | 84 new _KeyboardEventHandler('keyup'); |
63 /** Accessor to provide a stream of KeyEvents on the desired target. */ | 85 /** Accessor to provide a stream of KeyEvents on the desired target. */ |
64 static EventStreamProvider<KeyEvent> keyPressEvent = | 86 static EventStreamProvider<KeyEvent> keyPressEvent = |
65 new _KeyboardEventHandler('keypress'); | 87 new _KeyboardEventHandler('keypress'); |
66 | 88 |
| 89 /** The currently registered target for this event. */ |
| 90 EventTarget get currentTarget => _currentTarget; |
| 91 |
67 /** True if the altGraphKey is pressed during this event. */ | 92 /** True if the altGraphKey is pressed during this event. */ |
68 bool get altGraphKey => _parent.altGraphKey; | 93 bool get altGraphKey => _parent.altGraphKey; |
69 /** Accessor to the clipboardData available for this event. */ | 94 /** Accessor to the clipboardData available for this event. */ |
70 DataTransfer get clipboardData => _parent.clipboardData; | 95 DataTransfer get clipboardData => _parent.clipboardData; |
71 /** True if the ctrl key is pressed during this event. */ | 96 /** True if the ctrl key is pressed during this event. */ |
72 bool get ctrlKey => _parent.ctrlKey; | 97 bool get ctrlKey => _parent.ctrlKey; |
73 int get detail => _parent.detail; | 98 int get detail => _parent.detail; |
74 /** | 99 /** |
75 * Accessor to the part of the keyboard that the key was pressed from (one of | 100 * Accessor to the part of the keyboard that the key was pressed from (one of |
76 * KeyLocation.STANDARD, KeyLocation.RIGHT, KeyLocation.LEFT, | 101 * KeyLocation.STANDARD, KeyLocation.RIGHT, KeyLocation.LEFT, |
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96 throw new UnsupportedError("keyIdentifier is unsupported."); | 121 throw new UnsupportedError("keyIdentifier is unsupported."); |
97 } | 122 } |
98 void _initKeyboardEvent(String type, bool canBubble, bool cancelable, | 123 void _initKeyboardEvent(String type, bool canBubble, bool cancelable, |
99 Window view, String keyIdentifier, int keyLocation, bool ctrlKey, | 124 Window view, String keyIdentifier, int keyLocation, bool ctrlKey, |
100 bool altKey, bool shiftKey, bool metaKey, | 125 bool altKey, bool shiftKey, bool metaKey, |
101 bool altGraphKey) { | 126 bool altGraphKey) { |
102 throw new UnsupportedError( | 127 throw new UnsupportedError( |
103 "Cannot initialize a KeyboardEvent from a KeyEvent."); | 128 "Cannot initialize a KeyboardEvent from a KeyEvent."); |
104 } | 129 } |
105 } | 130 } |
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