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Side by Side Diff: tools/dom/src/KeyboardEventController.dart

Issue 11783009: Big merge from experimental to bleeding edge. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 7 years, 11 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 part of html; 5 part of html;
6 6
7 /** 7 /**
8 * Works with KeyboardEvent and KeyEvent to determine how to expose information 8 * Works with KeyboardEvent and KeyEvent to determine how to expose information
9 * about Key(board)Events. This class functions like an EventListenerList, and 9 * about Key(board)Events. This class functions like an EventListenerList, and
10 * provides a consistent interface for the Dart 10 * provides a consistent interface for the Dart
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143 if (_callbacks.length == 0) { 143 if (_callbacks.length == 0) {
144 // If we have no listeners, don't bother keeping track of keypresses. 144 // If we have no listeners, don't bother keeping track of keypresses.
145 _target.on.keyDown.remove(_keyDown); 145 _target.on.keyDown.remove(_keyDown);
146 _target.on.keyPress.remove(_keyPress); 146 _target.on.keyPress.remove(_keyPress);
147 _target.on.keyUp.remove(_keyUp); 147 _target.on.keyUp.remove(_keyUp);
148 } 148 }
149 } 149 }
150 150
151 /** Determine if caps lock is one of the currently depressed keys. */ 151 /** Determine if caps lock is one of the currently depressed keys. */
152 bool get _capsLockOn => 152 bool get _capsLockOn =>
153 _keyDownList.some((var element) => element.keyCode == KeyCode.CAPS_LOCK); 153 _keyDownList.any((var element) => element.keyCode == KeyCode.CAPS_LOCK);
154 154
155 /** 155 /**
156 * Given the previously recorded keydown key codes, see if we can determine 156 * Given the previously recorded keydown key codes, see if we can determine
157 * the keycode of this keypress [event]. (Generally browsers only provide 157 * the keycode of this keypress [event]. (Generally browsers only provide
158 * charCode information for keypress events, but with a little 158 * charCode information for keypress events, but with a little
159 * reverse-engineering, we can also determine the keyCode.) Returns 159 * reverse-engineering, we can also determine the keyCode.) Returns
160 * KeyCode.UNKNOWN if the keycode could not be determined. 160 * KeyCode.UNKNOWN if the keycode could not be determined.
161 */ 161 */
162 int _determineKeyCodeForKeypress(KeyboardEvent event) { 162 int _determineKeyCodeForKeypress(KeyboardEvent event) {
163 // Note: This function is a work in progress. We'll expand this function 163 // Note: This function is a work in progress. We'll expand this function
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372 // pressed, given previous keydown information. 372 // pressed, given previous keydown information.
373 e._shadowKeyCode = _determineKeyCodeForKeypress(e); 373 e._shadowKeyCode = _determineKeyCodeForKeypress(e);
374 374
375 // Correct the key value for certain browser-specific quirks. 375 // Correct the key value for certain browser-specific quirks.
376 if (e._shadowKeyIdentifier != null && 376 if (e._shadowKeyIdentifier != null &&
377 _keyIdentifier.containsKey(e._shadowKeyIdentifier)) { 377 _keyIdentifier.containsKey(e._shadowKeyIdentifier)) {
378 // This is needed for Safari Windows because it currently doesn't give a 378 // This is needed for Safari Windows because it currently doesn't give a
379 // keyCode/which for non printable keys. 379 // keyCode/which for non printable keys.
380 e._shadowKeyCode = _keyIdentifier[e._shadowKeyIdentifier]; 380 e._shadowKeyCode = _keyIdentifier[e._shadowKeyIdentifier];
381 } 381 }
382 e._shadowAltKey = _keyDownList.some((var element) => element.altKey); 382 e._shadowAltKey = _keyDownList.any((var element) => element.altKey);
383 _dispatch(e); 383 _dispatch(e);
384 } 384 }
385 385
386 /** Handle keyup events. */ 386 /** Handle keyup events. */
387 void processKeyUp(KeyboardEvent event) { 387 void processKeyUp(KeyboardEvent event) {
388 var e = new KeyEvent(event); 388 var e = new KeyEvent(event);
389 KeyboardEvent toRemove = null; 389 KeyboardEvent toRemove = null;
390 for (var key in _keyDownList) { 390 for (var key in _keyDownList) {
391 if (key.keyCode == e.keyCode) { 391 if (key.keyCode == e.keyCode) {
392 toRemove = key; 392 toRemove = key;
393 } 393 }
394 } 394 }
395 if (toRemove != null) { 395 if (toRemove != null) {
396 _keyDownList = _keyDownList.filter((element) => element != toRemove); 396 _keyDownList =
397 _keyDownList.where((element) => element != toRemove).toList();
397 } else if (_keyDownList.length > 0) { 398 } else if (_keyDownList.length > 0) {
398 // This happens when we've reached some international keyboard case we 399 // This happens when we've reached some international keyboard case we
399 // haven't accounted for or we haven't correctly eliminated all browser 400 // haven't accounted for or we haven't correctly eliminated all browser
400 // inconsistencies. Filing bugs on when this is reached is welcome! 401 // inconsistencies. Filing bugs on when this is reached is welcome!
401 _keyDownList.removeLast(); 402 _keyDownList.removeLast();
402 } 403 }
403 _dispatch(e); 404 _dispatch(e);
404 } 405 }
405 } 406 }
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