angular2/src/render/dom/events/key_events.map

Angular 2 - a web framework for modern web apps

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{DOM} from 'angular2/src/dom/dom_adapter';\nimport {isPresent, isBlank, StringWrapper, RegExpWrapper, BaseException, NumberWrapper} from 'angular2/src/facade/lang';\nimport {StringMapWrapper, ListWrapper} from 'angular2/src/facade/collection';\nimport {EventManagerPlugin} from './event_manager';\n\nvar modifierKeys = ['alt', 'control', 'meta', 'shift'];\nvar modifierKeyGetters = {\n  'alt': (event) => event.altKey,\n  'control': (event) => event.ctrlKey,\n  'meta': (event) => event.metaKey,\n  'shift': (event) => event.shiftKey\n}\n\nexport class KeyEventsPlugin extends EventManagerPlugin {\n  constructor() {\n    super();\n  }\n\n  supports(eventName: string): boolean {\n    return isPresent(KeyEventsPlugin.parseEventName(eventName));\n  }\n\n  addEventListener(element, eventName: string, handler: Function,\n      shouldSupportBubble: boolean) {\n    var parsedEvent = KeyEventsPlugin.parseEventName(eventName);\n\n    var outsideHandler = KeyEventsPlugin.eventCallback(element, shouldSupportBubble,\n      StringMapWrapper.get(parsedEvent, 'fullKey'), handler, this.manager.getZone());\n\n    this.manager.getZone().runOutsideAngular(() => {\n      DOM.on(element, StringMapWrapper.get(parsedEvent, 'domEventName'), outsideHandler);\n    });\n  }\n\n  static parseEventName(eventName: string) /* {'domEventName': string, 'fullKey': string} */ {\n    eventName = eventName.toLowerCase();\n    var parts = eventName.split('.');\n    var domEventName = ListWrapper.removeAt(parts, 0);\n    if ((parts.length === 0) || !(StringWrapper.equals(domEventName, 'keydown') || StringWrapper.equals(domEventName, 'keyup'))) {\n      return null;\n    }\n    var key = ListWrapper.removeLast(parts);\n\n    var fullKey = '';\n    ListWrapper.forEach(modifierKeys, (modifierName) => {\n      if (ListWrapper.contains(parts, modifierName)) {\n        ListWrapper.remove(parts, modifierName);\n        fullKey += modifierName + '.';\n      }\n    });\n    fullKey += key;\n\n    if (parts.length != 0 || key.length === 0) {\n      // returning null instead of throwing to let another plugin process the event\n      return null;\n    }\n\n    return {\n      'domEventName': domEventName,\n      'fullKey': fullKey\n    };\n  }\n\n  static getEventFullKey(event): string {\n    var fullKey = '';\n    var key = DOM.getEventKey(event);\n    key = key.toLowerCase();\n    if (StringWrapper.equals(key, ' ')) {\n      key = 'space'; // for readability\n    } else if (StringWrapper.equals(key, '.')) {\n      key = 'dot'; // because '.' is used as a separator in event names\n    }\n    ListWrapper.forEach(modifierKeys, (modifierName) => {\n      if (modifierName != key) {\n        var modifierGetter = StringMapWrapper.get(modifierKeyGetters, modifierName);\n        if (modifierGetter(event)) {\n          fullKey += modifierName + '.';\n        }\n      }\n    });\n    fullKey += key;\n    return fullKey;\n  }\n\n  static eventCallback(element, shouldSupportBubble, fullKey, handler, zone) {\n    return (event) => {\n        var correctElement = shouldSupportBubble || event.target === element;\n        if (correctElement && KeyEventsPlugin.getEventFullKey(event) === fullKey) {\n          zone.run(() => handler(event));\n        }\n      };\n  }\n}\n"]}