forked from zhurui/management
68 lines
1.6 KiB
JavaScript
68 lines
1.6 KiB
JavaScript
|
function E () {
|
||
|
|
// Keep this empty so it's easier to inherit from
|
||
|
|
// (via https://github.com/lipsmack from https://github.com/scottcorgan/tiny-emitter/issues/3)
|
||
|
|
}
|
||
|
|
|
||
|
|
E.prototype = {
|
||
|
|
on: function (name, callback, ctx) {
|
||
|
|
var e = this.e || (this.e = {});
|
||
|
|
|
||
|
|
(e[name] || (e[name] = [])).push({
|
||
|
|
fn: callback,
|
||
|
|
ctx: ctx
|
||
|
|
});
|
||
|
|
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
|
||
|
|
once: function (name, callback, ctx) {
|
||
|
|
var self = this;
|
||
|
|
function listener () {
|
||
|
|
self.off(name, listener);
|
||
|
|
callback.apply(ctx, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
listener._ = callback
|
||
|
|
return this.on(name, listener, ctx);
|
||
|
|
},
|
||
|
|
|
||
|
|
emit: function (name) {
|
||
|
|
var data = [].slice.call(arguments, 1);
|
||
|
|
var evtArr = ((this.e || (this.e = {}))[name] || []).slice();
|
||
|
|
var i = 0;
|
||
|
|
var len = evtArr.length;
|
||
|
|
|
||
|
|
for (i; i < len; i++) {
|
||
|
|
evtArr[i].fn.apply(evtArr[i].ctx, data);
|
||
|
|
}
|
||
|
|
|
||
|
|
return this;
|
||
|
|
},
|
||
|
|
|
||
|
|
off: function (name, callback) {
|
||
|
|
var e = this.e || (this.e = {});
|
||
|
|
var evts = e[name];
|
||
|
|
var liveEvents = [];
|
||
|
|
|
||
|
|
if (evts && callback) {
|
||
|
|
for (var i = 0, len = evts.length; i < len; i++) {
|
||
|
|
if (evts[i].fn !== callback && evts[i].fn._ !== callback)
|
||
|
|
liveEvents.push(evts[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Remove event from queue to prevent memory leak
|
||
|
|
// Suggested by https://github.com/lazd
|
||
|
|
// Ref: https://github.com/scottcorgan/tiny-emitter/commit/c6ebfaa9bc973b33d110a84a307742b7cf94c953#commitcomment-5024910
|
||
|
|
|
||
|
|
(liveEvents.length)
|
||
|
|
? e[name] = liveEvents
|
||
|
|
: delete e[name];
|
||
|
|
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = E;
|
||
|
|
module.exports.TinyEmitter = E;
|