tao-test/app/taoQtiItem/views/js/portableLib/OAT/customEvent.js

111 lines
3.6 KiB
JavaScript

/**
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; under version 2
* of the License (non-upgradable).
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright (c) 2015 (original work) Open Assessment Technologies SA ;
*/
/**
* @author Jean-Sébastien Conan <jean-sebastien.conan@vesperiagroup.com>
*/
define([], function () {
'use strict';
var createEvent;
var dispatchEvent;
/**
* Creates an event
* @function createEvent
* @param {String} eventName
* @param {*} data
*/
if (window.CustomEvent) {
createEvent = function createEventUsingCustomEvent(eventName, data) {
var event;
try {
event = new CustomEvent(eventName, {
detail: data,
bubbles: true,
cancelable: true
});
} catch (e) {
event = document.createEvent('CustomEvent');
event.initCustomEvent(eventName, true, true, data);
}
return event;
};
} else if (document.createEvent) {
createEvent = function createEventUsingCreateEvent(eventName, data) {
var event = document.createEvent('Event');
event.initEvent(eventName, true, true);
event.detail = data;
return event;
};
} else if (document.createEventObject) {
createEvent = function createEventUsingCreateEventObject(eventName, data) {
var event = document.createEventObject();
event.detail = data;
return event;
};
} else {
createEvent = function createEventDummy() {
};
}
/**
* Dispatches an event
* @function dispatchEvent
* @param {HTMLElement} element
* @param {String} eventName
* @param {Event} event
* @return {Boolean} Returns `true` if the event has been dispatched
*/
if (document.dispatchEvent) {
dispatchEvent = function dispatchEventUsingDispatchEvent(element, eventName, event) {
if (element) {
element.dispatchEvent(event);
return true;
}
return false;
};
} else if (document.fireEvent) {
dispatchEvent = function dispatchEventUsingFireEvent(element, eventName, event) {
if (element) {
element.fireEvent('on' + eventName, event);
return true;
}
return false;
};
} else {
dispatchEvent = function dispatchEventDummy() {
return false;
};
}
/**
* Triggers a custom event using native methods
* @param {HTMLElement} element
* @param {String} eventName
* @param {*} data
* @returns {Boolean} Returns true if the event has been successfully triggered
*/
var triggerCustomEvent = function triggerCustomEvent(element, eventName, data) {
var event = createEvent(eventName, data);
return dispatchEvent(element, eventName, event);
};
return triggerCustomEvent;
});