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47 lines
1.3 KiB
CoffeeScript
47 lines
1.3 KiB
CoffeeScript
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# This is a simple port of microevent.js to Coffeescript. I've changed the
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# function names to be consistent with node.js EventEmitter.
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#
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# microevent.js is copyright Jerome Etienne, and licensed under the MIT license:
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# https://github.com/jeromeetienne/microevent.js
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nextTick = if WEB? then (fn) -> setTimeout fn, 0 else process['nextTick']
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class MicroEvent
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on: (event, fct) ->
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@_events ||= {}
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@_events[event] ||= []
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@_events[event].push(fct)
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this
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removeListener: (event, fct) ->
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@_events ||= {}
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listeners = (@_events[event] ||= [])
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# Sadly, there's no IE8- support for indexOf.
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i = 0
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while i < listeners.length
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listeners[i] = undefined if listeners[i] == fct
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i++
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nextTick => @_events[event] = (x for x in @_events[event] when x)
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this
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emit: (event, args...) ->
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return this unless @_events?[event]
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fn.apply this, args for fn in @_events[event] when fn
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this
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# mixin will delegate all MicroEvent.js function in the destination object
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MicroEvent.mixin = (obj) ->
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proto = obj.prototype || obj
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# Damn closure compiler :/
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proto.on = MicroEvent.prototype.on
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proto.removeListener = MicroEvent.prototype.removeListener
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proto.emit = MicroEvent.prototype.emit
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obj
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module.exports = MicroEvent unless WEB?
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