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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Normalisation helpers.
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*
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* @module core/normalise
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* @copyright 2020 Andrew Nicols <andrew@nicols.co.uk>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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import jQuery from 'jquery';
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/**
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* Normalise a list of Nodes into an Array of Nodes.
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*
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* @method getList
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* @param {(Array|jQuery|NodeList|HTMLElement)} nodes
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* @returns {HTMLElement[]}
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*/
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export const getList = nodes => {
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if (nodes instanceof HTMLElement) {
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// A single record to conver to a NodeList.
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return [nodes];
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}
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if (nodes instanceof Array) {
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// A single record to conver to a NodeList.
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return nodes;
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}
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if (nodes instanceof NodeList) {
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// Already a NodeList.
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return Array.from(nodes);
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}
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if (nodes instanceof jQuery) {
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// A jQuery object to a NodeList.
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return nodes.get();
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}
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// Fallback to just having a go.
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return Array.from(nodes);
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};
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/**
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* Return the first element in a list of normalised Nodes.
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*
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* @param {Array|jQuery|NodeList|HTMLElement} nodes the unmormalised list of nodes
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* @returns {HTMLElement|undefined} the first list element
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*/
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export const getFirst = nodes => {
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const list = getList(nodes);
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return list[0];
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};
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/**
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* Normalise a single node into an HTMLElement.
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*
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* @param {jQuery|Y.Node|HTMLElement} node The node to normalise
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* @returns {HTMLElement}
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*/
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export const getElement = (node) => {
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if (node instanceof HTMLElement) {
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return node;
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}
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if (node?._node) {
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// This is likely a YUI Node.
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// We can use (node instanceof Y.Node) but we would have to load YUI to do some.
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return node._node;
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}
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if (node instanceof jQuery && node.length > 0) {
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return node.get(0);
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}
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return null;
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};
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