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Original file line number | Diff line number | Diff line change |
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@@ -1,59 +1,60 @@ | ||
export class EventEmitter { | ||
private _events: { [eventType: string]: any[] }; | ||
private _events: { [type: string]: ((event: any) => void)[] }; | ||
|
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constructor() { | ||
this._events = {}; | ||
} | ||
constructor() { this._events = {}; } | ||
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/** | ||
* Subscribe to an event by its name. | ||
* @param {string }eventType - The name of the event to subscribe to. | ||
* @param {any} fn - The handler called when the event occurs. | ||
* @param {string} type - The name of the event | ||
* to subscribe to. | ||
* @param {(event: T) => void} handler - The | ||
* handler called when the event occurs. | ||
*/ | ||
public on(eventType: string, fn: any): void { | ||
this._events[eventType] = this._events[eventType] || []; | ||
this._events[eventType].push(fn); | ||
return; | ||
public on<T>( | ||
type: string, | ||
handler: (event: T) => void): void { | ||
this._events[type] = this._events[type] || []; | ||
this._events[type].push(handler); | ||
} | ||
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/** | ||
* Unsubscribe from an event by its name. | ||
* @param {string} eventType - The name of the event to subscribe to. | ||
* @param {any} fn - The handler to remove. | ||
* @param {string} type - The name of the event | ||
* to unsubscribe from. | ||
* @param {(event: T) => void} handler - The | ||
* handler to remove. | ||
*/ | ||
public off(eventType: string, fn: any): void { | ||
if (!eventType) { | ||
this._events = {}; | ||
return; | ||
} | ||
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if (!this._listens(eventType)) { | ||
let idx: number = this._events[eventType].indexOf(fn); | ||
if (idx >= 0) { | ||
this._events[eventType].splice(idx, 1); | ||
public off<T>( | ||
type: string, | ||
handler: (event: T) => void): void { | ||
if (!type) { this._events = {}; return; } | ||
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if (!this._listens(type)) { | ||
const index = this._events[type].indexOf(handler); | ||
if (index >= 0) { | ||
this._events[type].splice(index, 1); | ||
} | ||
if (this._events[eventType].length) { | ||
delete this._events[eventType]; | ||
if (this._events[type].length) { | ||
delete this._events[type]; | ||
} | ||
} else { | ||
delete this._events[eventType]; | ||
delete this._events[type]; | ||
} | ||
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return; | ||
} | ||
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public fire(eventType: string, data: any): void { | ||
if (!this._listens(eventType)) { | ||
return; | ||
} | ||
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for (let fn of this._events[eventType]) { | ||
fn.call(this, data); | ||
/** | ||
* @ignore | ||
*/ | ||
public fire<T>( | ||
type: string, | ||
event: T): void { | ||
if (!this._listens(type)) { return; } | ||
for (let fn of this._events[type]) { | ||
fn.call(this, event); | ||
} | ||
return; | ||
} | ||
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private _listens(eventType: string): boolean { | ||
return !!(this._events && this._events[eventType]); | ||
return eventType in this._events; | ||
} | ||
} |
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