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

Angular 2 - a web framework for modern web apps

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{isBlank, BaseException, isPresent, StringWrapper} from 'angular2/src/facade/lang';\nimport {DOM} from 'angular2/src/dom/dom_adapter';\nimport {List, ListWrapper, MapWrapper} from 'angular2/src/facade/collection';\nimport {VmTurnZone} from 'angular2/src/core/zone/vm_turn_zone';\n\nvar BUBBLE_SYMBOL = '^';\n\nexport class EventManager {\n  _plugins: List<EventManagerPlugin>;\n  _zone: VmTurnZone;\n\n  constructor(plugins: List<EventManagerPlugin>, zone: VmTurnZone) {\n    this._zone = zone;\n    this._plugins = plugins;\n    for (var i = 0; i < plugins.length; i++) {\n      plugins[i].manager = this;\n    }\n  }\n\n  addEventListener(element, eventName: string, handler: Function) {\n    var withoutBubbleSymbol = this._removeBubbleSymbol(eventName);\n    var plugin = this._findPluginFor(withoutBubbleSymbol);\n    plugin.addEventListener(element, withoutBubbleSymbol, handler, withoutBubbleSymbol != eventName);\n  }\n\n  addGlobalEventListener(target: string, eventName: string, handler: Function): Function {\n    var withoutBubbleSymbol = this._removeBubbleSymbol(eventName);\n    var plugin = this._findPluginFor(withoutBubbleSymbol);\n    return plugin.addGlobalEventListener(target, withoutBubbleSymbol, handler, withoutBubbleSymbol != eventName);\n  }\n\n  getZone(): VmTurnZone {\n    return this._zone;\n  }\n\n  _findPluginFor(eventName: string): EventManagerPlugin {\n    var plugins = this._plugins;\n    for (var i = 0; i < plugins.length; i++) {\n      var plugin = plugins[i];\n      if (plugin.supports(eventName)) {\n        return plugin;\n      }\n    }\n    throw new BaseException(`No event manager plugin found for event ${eventName}`);\n  }\n\n  _removeBubbleSymbol(eventName: string): string {\n    return eventName[0] == BUBBLE_SYMBOL ? StringWrapper.substring(eventName, 1) : eventName;\n  }\n}\n\nexport class EventManagerPlugin {\n  manager: EventManager;\n\n  // We are assuming here that all plugins support bubbled and non-bubbled events.\n  // That is equivalent to having supporting $event.target\n  // The bubbling flag (currently ^) is stripped before calling the supports and \n  // addEventListener methods.\n  supports(eventName: string): boolean {\n    return false;\n  }\n\n  addEventListener(element, eventName: string, handler: Function, shouldSupportBubble: boolean) {\n    throw \"not implemented\";\n  }\n\n  addGlobalEventListener(element, eventName: string, handler: Function, shouldSupportBubble: boolean): Function {\n    throw \"not implemented\";\n  }\n}\n\nexport class DomEventsPlugin extends EventManagerPlugin {\n  manager: EventManager;\n\n  // This plugin should come last in the list of plugins, because it accepts all\n  // events.\n  supports(eventName: string): boolean {\n    return true;\n  }\n\n  addEventListener(element, eventName: string, handler: Function, shouldSupportBubble: boolean) {\n    var outsideHandler = this._getOutsideHandler(shouldSupportBubble, element, handler, this.manager._zone);\n    this.manager._zone.runOutsideAngular(() => {\n      DOM.on(element, eventName, outsideHandler);\n    });\n  }\n\n  addGlobalEventListener(target:string, eventName: string, handler: Function, shouldSupportBubble: boolean): Function {\n    var element = DOM.getGlobalEventTarget(target);\n    var outsideHandler = this._getOutsideHandler(shouldSupportBubble, element, handler, this.manager._zone);\n    return this.manager._zone.runOutsideAngular(() => {\n      return DOM.onAndCancel(element, eventName, outsideHandler);\n    });\n  }\n\n  _getOutsideHandler(shouldSupportBubble: boolean, element, handler: Function, zone: VmTurnZone) {\n    return shouldSupportBubble ?\n      DomEventsPlugin.bubbleCallback(element, handler, zone) :\n      DomEventsPlugin.sameElementCallback(element, handler, zone);\n  }\n\n  static sameElementCallback(element, handler, zone) {\n    return (event) => {\n        if (event.target === element) {\n          zone.run(() => handler(event));\n        }\n      };\n  }\n\n  static bubbleCallback(element, handler, zone) {\n    return (event) => zone.run(() => handler(event));\n  }\n}\n"]}