98 lines
2.8 KiB
JavaScript
98 lines
2.8 KiB
JavaScript
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var Event = Event || class Event { constructor(type){this.type=type} }
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// eventoj lancilo = events launcher
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var EventojLancilo = function( obj )
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{
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obj = this instanceof EventojLancilo ? this : obj
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obj = obj instanceof Function ? obj.prototype : obj
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let has = {
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add: obj.addEventListener || obj.on
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, rem: obj.removeEventListener || obj.off
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, emit: obj.dispatchEvent || obj.emit || obj.fire || obj.fireEvent
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}
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// console.log(has)
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if( !has.add )
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obj[Symbol.Eventoj] = {}
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// obj.on = tplOrCall(add) tpl?
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// obj.on('a',cb) n ok
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// obj.on('a',cb,opt) n ok
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// obj.on('a b',cb) n ok
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// obj.on(['a','b'],cb) y ko
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// obj.on(['a','b'],cb,opt) n ok
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// obj.on(['a','b','c'],cb,{}) y ko
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// obj.on({a:cba,b:cb2,c:cb3}) n ok
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// obj.on('a')(cb) n ko
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// obj.on(['a'])(cb) y ok
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// obj.on`a`(cb) y ok
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// obj.on`${str}change`(cb) y ok
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function tplOrCall( fn )
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{
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return function( ss, ...pp )
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{
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let isTpl = Array.isArray( ss ) && ss.every( o=> typeof o == 'string' ) && ss.length == pp.length + 1
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return isTpl
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? (...a)=> fn.bind(this)( String.merge(ss,...pp), ...a )
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: fn.bind(this)( ss, ...pp )
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}
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}
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// obj.on(['a','b'],cb,opt)
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// obj.on({a:cba,b:cb2,c:cb3},opt)
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// obj.on('a b',cb,opt)
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function multi( fn )
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{
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return ( ev, ...args )=>
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Array.isArray( ev )
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? ev.map( e=> fn(e,...args) )
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: typeof ev == 'object'
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? Object.keys( ev ).map( e=> fn(e,ev[e],...args) )
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: fn(ev,...args)
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}
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function on( event, handler, options )
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{
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let evs = this[Symbol.Eventoj][event] = this[Symbol.Eventoj][event] || []
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!evs.includes( handler )
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&& evs.push( handler )
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return this
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}
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function one( event, handler, options )
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{
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return on( event, (...args)=> off(handler) && handler(...args) )
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}
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function off( event, handler )
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{
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let evs = obj[Symbol.Eventoj][event] = obj[Symbol.Eventoj][event] || []
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evs.includes( handler )
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&& evs.splice( evs.indexOf(handler), 1 )
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return obj
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}
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function fire( event, ...args )
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{
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event = typeof event == 'string'
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? new Event( event )
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: event
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event.target = obj
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event.details = args
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event.type in obj[Symbol.Eventoj]
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&& obj[Symbol.Eventoj][event.type].map( h=> h.call(obj, event, ...args) )
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return event
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}
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Object.defineProperties( obj, {
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on: { value: tplOrCall(has.add ? has.add : on) }
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, off: { value: tplOrCall(has.rem ? has.rem : off) }
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, fire: { value: tplOrCall(has.emit ? has.emit : fire) }
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, one: { value: tplOrCall(has.add ? has.add : one) }
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, once: { value: tplOrCall(has.add ? has.add : one) }
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, addEventListener: { value: tplOrCall(has.add ? has.add : on) }
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, removeEventListener: { value: tplOrCall(has.rem ? has.rem : off) }
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, dispatchEvent: { value: tplOrCall(has.emit ? has.emit : fire) }
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, emit: { value: tplOrCall(has.emit ? has.emit : fire) }
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})
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}
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Symbol.Eventoj = Symbol`Eventoj`
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export { Event, EventojLancilo } |