mirror of https://github.com/friendica/friendica
72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
'use strict';
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var EventElement = function (element) {
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this.element = element;
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this.events = {};
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};
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EventElement.prototype.bind = function (eventName, handler) {
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if (typeof this.events[eventName] === 'undefined') {
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this.events[eventName] = [];
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}
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this.events[eventName].push(handler);
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this.element.addEventListener(eventName, handler, false);
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};
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EventElement.prototype.unbind = function (eventName, handler) {
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var isHandlerProvided = (typeof handler !== 'undefined');
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this.events[eventName] = this.events[eventName].filter(function (hdlr) {
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if (isHandlerProvided && hdlr !== handler) {
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return true;
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}
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this.element.removeEventListener(eventName, hdlr, false);
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return false;
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}, this);
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};
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EventElement.prototype.unbindAll = function () {
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for (var name in this.events) {
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this.unbind(name);
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}
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};
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var EventManager = function () {
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this.eventElements = [];
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};
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EventManager.prototype.eventElement = function (element) {
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var ee = this.eventElements.filter(function (eventElement) {
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return eventElement.element === element;
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})[0];
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if (typeof ee === 'undefined') {
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ee = new EventElement(element);
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this.eventElements.push(ee);
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}
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return ee;
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};
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EventManager.prototype.bind = function (element, eventName, handler) {
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this.eventElement(element).bind(eventName, handler);
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};
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EventManager.prototype.unbind = function (element, eventName, handler) {
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this.eventElement(element).unbind(eventName, handler);
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};
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EventManager.prototype.unbindAll = function () {
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for (var i = 0; i < this.eventElements.length; i++) {
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this.eventElements[i].unbindAll();
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}
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};
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EventManager.prototype.once = function (element, eventName, handler) {
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var ee = this.eventElement(element);
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var onceHandler = function (e) {
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ee.unbind(eventName, onceHandler);
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handler(e);
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};
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ee.bind(eventName, onceHandler);
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};
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module.exports = EventManager;
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