gnezim
48 lines
1.0 KiB
JavaScript
48 lines
1.0 KiB
JavaScript
'use strict';
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function TraversalTracker() {
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this.events = {};
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}
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TraversalTracker.prototype.startTracking = function (event, callback) {
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var callbacks = this.events[event] || (this.events[event] = []);
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if (callbacks.indexOf(callback) < 0) {
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callbacks.push(callback);
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}
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};
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TraversalTracker.prototype.stopTracking = function (event, callback) {
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var callbacks = this.events[event];
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if (!callbacks) {
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return;
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}
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var index = callbacks.indexOf(callback);
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if (index >= 0) {
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callbacks.splice(index, 1);
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}
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};
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TraversalTracker.prototype.emit = function (event) {
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var args = Array.prototype.slice.call(arguments, 1);
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var callbacks = this.events[event];
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if (!callbacks) {
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return;
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}
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callbacks.forEach(function (callback) {
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callback.apply(this, args);
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});
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};
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TraversalTracker.prototype.auto = function (event, callback, innerFunction) {
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this.startTracking(event, callback);
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innerFunction();
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this.stopTracking(event, callback);
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};
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module.exports = TraversalTracker;
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