451 lines
12 KiB
JavaScript
451 lines
12 KiB
JavaScript
(function($) {
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'use strict';
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let _defaults = {
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data: {}, // Autocomplete data set
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limit: Infinity, // Limit of results the autocomplete shows
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onAutocomplete: null, // Callback for when autocompleted
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minLength: 1, // Min characters before autocomplete starts
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sortFunction: function(a, b, inputString) {
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// Sort function for sorting autocomplete results
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return a.indexOf(inputString) - b.indexOf(inputString);
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}
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};
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/**
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* @class
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*
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*/
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class Autocomplete extends Component {
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/**
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* Construct Autocomplete instance
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* @constructor
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* @param {Element} el
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* @param {Object} options
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*/
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constructor(el, options) {
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super(Autocomplete, el, options);
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this.el.M_Autocomplete = this;
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/**
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* Options for the autocomplete
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* @member Autocomplete#options
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* @prop {Number} duration
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* @prop {Number} dist
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* @prop {number} shift
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* @prop {number} padding
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* @prop {Boolean} fullWidth
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* @prop {Boolean} indicators
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* @prop {Boolean} noWrap
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* @prop {Function} onCycleTo
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*/
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this.options = $.extend({}, Autocomplete.defaults, options);
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// Setup
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this.isOpen = false;
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this.count = 0;
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this.activeIndex = -1;
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this.oldVal;
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this.$inputField = this.$el.closest('.input-field');
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this.$active = $();
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this._mousedown = false;
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this._setupDropdown();
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this._setupEventHandlers();
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}
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static get defaults() {
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return _defaults;
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}
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static init(els, options) {
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return super.init(this, els, options);
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}
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/**
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* Get Instance
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*/
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static getInstance(el) {
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let domElem = !!el.jquery ? el[0] : el;
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return domElem.M_Autocomplete;
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}
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/**
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* Teardown component
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*/
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destroy() {
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this._removeEventHandlers();
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this._removeDropdown();
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this.el.M_Autocomplete = undefined;
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}
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/**
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* Setup Event Handlers
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*/
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_setupEventHandlers() {
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this._handleInputBlurBound = this._handleInputBlur.bind(this);
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this._handleInputKeyupAndFocusBound = this._handleInputKeyupAndFocus.bind(this);
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this._handleInputKeydownBound = this._handleInputKeydown.bind(this);
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this._handleInputClickBound = this._handleInputClick.bind(this);
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this._handleContainerMousedownAndTouchstartBound = this._handleContainerMousedownAndTouchstart.bind(
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this
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);
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this._handleContainerMouseupAndTouchendBound = this._handleContainerMouseupAndTouchend.bind(
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this
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);
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this.el.addEventListener('blur', this._handleInputBlurBound);
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this.el.addEventListener('keyup', this._handleInputKeyupAndFocusBound);
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this.el.addEventListener('focus', this._handleInputKeyupAndFocusBound);
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this.el.addEventListener('keydown', this._handleInputKeydownBound);
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this.el.addEventListener('click', this._handleInputClickBound);
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this.container.addEventListener(
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'mousedown',
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this._handleContainerMousedownAndTouchstartBound
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);
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this.container.addEventListener('mouseup', this._handleContainerMouseupAndTouchendBound);
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if (typeof window.ontouchstart !== 'undefined') {
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this.container.addEventListener(
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'touchstart',
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this._handleContainerMousedownAndTouchstartBound
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);
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this.container.addEventListener('touchend', this._handleContainerMouseupAndTouchendBound);
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}
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}
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/**
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* Remove Event Handlers
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*/
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_removeEventHandlers() {
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this.el.removeEventListener('blur', this._handleInputBlurBound);
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this.el.removeEventListener('keyup', this._handleInputKeyupAndFocusBound);
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this.el.removeEventListener('focus', this._handleInputKeyupAndFocusBound);
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this.el.removeEventListener('keydown', this._handleInputKeydownBound);
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this.el.removeEventListener('click', this._handleInputClickBound);
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this.container.removeEventListener(
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'mousedown',
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this._handleContainerMousedownAndTouchstartBound
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);
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this.container.removeEventListener('mouseup', this._handleContainerMouseupAndTouchendBound);
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if (typeof window.ontouchstart !== 'undefined') {
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this.container.removeEventListener(
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'touchstart',
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this._handleContainerMousedownAndTouchstartBound
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);
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this.container.removeEventListener(
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'touchend',
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this._handleContainerMouseupAndTouchendBound
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);
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}
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}
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/**
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* Setup dropdown
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*/
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_setupDropdown() {
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this.container = document.createElement('ul');
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this.container.id = `autocomplete-options-${M.guid()}`;
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$(this.container).addClass('autocomplete-content dropdown-content');
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this.$inputField.append(this.container);
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this.el.setAttribute('data-target', this.container.id);
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this.dropdown = M.Dropdown.init(this.el, {
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autoFocus: false,
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closeOnClick: false,
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coverTrigger: false,
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onItemClick: (itemEl) => {
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this.selectOption($(itemEl));
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}
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});
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// Sketchy removal of dropdown click handler
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this.el.removeEventListener('click', this.dropdown._handleClickBound);
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}
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/**
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* Remove dropdown
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*/
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_removeDropdown() {
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this.container.parentNode.removeChild(this.container);
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}
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/**
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* Handle Input Blur
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*/
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_handleInputBlur() {
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if (!this._mousedown) {
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this.close();
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this._resetAutocomplete();
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}
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}
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/**
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* Handle Input Keyup and Focus
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* @param {Event} e
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*/
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_handleInputKeyupAndFocus(e) {
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if (e.type === 'keyup') {
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Autocomplete._keydown = false;
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}
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this.count = 0;
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let val = this.el.value.toLowerCase();
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// Don't capture enter or arrow key usage.
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if (e.keyCode === 13 || e.keyCode === 38 || e.keyCode === 40) {
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return;
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}
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// Check if the input isn't empty
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// Check if focus triggered by tab
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if (this.oldVal !== val && (M.tabPressed || e.type !== 'focus')) {
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this.open();
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}
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// Update oldVal
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this.oldVal = val;
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}
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/**
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* Handle Input Keydown
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* @param {Event} e
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*/
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_handleInputKeydown(e) {
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Autocomplete._keydown = true;
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// Arrow keys and enter key usage
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let keyCode = e.keyCode,
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liElement,
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numItems = $(this.container).children('li').length;
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// select element on Enter
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if (keyCode === M.keys.ENTER && this.activeIndex >= 0) {
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liElement = $(this.container)
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.children('li')
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.eq(this.activeIndex);
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if (liElement.length) {
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this.selectOption(liElement);
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e.preventDefault();
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}
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return;
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}
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// Capture up and down key
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if (keyCode === M.keys.ARROW_UP || keyCode === M.keys.ARROW_DOWN) {
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e.preventDefault();
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if (keyCode === M.keys.ARROW_UP && this.activeIndex > 0) {
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this.activeIndex--;
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}
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if (keyCode === M.keys.ARROW_DOWN && this.activeIndex < numItems - 1) {
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this.activeIndex++;
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}
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this.$active.removeClass('active');
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if (this.activeIndex >= 0) {
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this.$active = $(this.container)
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.children('li')
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.eq(this.activeIndex);
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this.$active.addClass('active');
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}
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}
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}
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/**
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* Handle Input Click
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* @param {Event} e
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*/
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_handleInputClick(e) {
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this.open();
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}
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/**
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* Handle Container Mousedown and Touchstart
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* @param {Event} e
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*/
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_handleContainerMousedownAndTouchstart(e) {
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this._mousedown = true;
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}
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/**
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* Handle Container Mouseup and Touchend
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* @param {Event} e
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*/
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_handleContainerMouseupAndTouchend(e) {
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this._mousedown = false;
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}
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/**
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* Highlight partial match
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*/
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_highlight(string, $el) {
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let img = $el.find('img');
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let matchStart = $el
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.text()
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.toLowerCase()
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.indexOf('' + string.toLowerCase() + ''),
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matchEnd = matchStart + string.length - 1,
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beforeMatch = $el.text().slice(0, matchStart),
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matchText = $el.text().slice(matchStart, matchEnd + 1),
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afterMatch = $el.text().slice(matchEnd + 1);
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$el.html(
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`<span>${beforeMatch}<span class='highlight'>${matchText}</span>${afterMatch}</span>`
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);
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if (img.length) {
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$el.prepend(img);
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}
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}
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/**
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* Reset current element position
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*/
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_resetCurrentElement() {
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this.activeIndex = -1;
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this.$active.removeClass('active');
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}
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/**
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* Reset autocomplete elements
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*/
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_resetAutocomplete() {
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$(this.container).empty();
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this._resetCurrentElement();
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this.oldVal = null;
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this.isOpen = false;
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this._mousedown = false;
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}
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/**
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* Select autocomplete option
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* @param {Element} el Autocomplete option list item element
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*/
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selectOption(el) {
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let text = el.text().trim();
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this.el.value = text;
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this.$el.trigger('change');
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this._resetAutocomplete();
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this.close();
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// Handle onAutocomplete callback.
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if (typeof this.options.onAutocomplete === 'function') {
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this.options.onAutocomplete.call(this, text);
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}
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}
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/**
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* Render dropdown content
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* @param {Object} data data set
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* @param {String} val current input value
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*/
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_renderDropdown(data, val) {
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this._resetAutocomplete();
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let matchingData = [];
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// Gather all matching data
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for (let key in data) {
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if (data.hasOwnProperty(key) && key.toLowerCase().indexOf(val) !== -1) {
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// Break if past limit
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if (this.count >= this.options.limit) {
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break;
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}
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let entry = {
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data: data[key],
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key: key
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};
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matchingData.push(entry);
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this.count++;
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}
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}
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// Sort
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if (this.options.sortFunction) {
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let sortFunctionBound = (a, b) => {
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return this.options.sortFunction(
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a.key.toLowerCase(),
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b.key.toLowerCase(),
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val.toLowerCase()
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);
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};
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matchingData.sort(sortFunctionBound);
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}
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// Render
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for (let i = 0; i < matchingData.length; i++) {
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let entry = matchingData[i];
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let $autocompleteOption = $('<li></li>');
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if (!!entry.data) {
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$autocompleteOption.append(
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`<img src="${entry.data}" class="right circle"><span>${entry.key}</span>`
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);
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} else {
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$autocompleteOption.append('<span>' + entry.key + '</span>');
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}
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$(this.container).append($autocompleteOption);
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this._highlight(val, $autocompleteOption);
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}
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}
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/**
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* Open Autocomplete Dropdown
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*/
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open() {
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let val = this.el.value.toLowerCase();
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this._resetAutocomplete();
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if (val.length >= this.options.minLength) {
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this.isOpen = true;
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this._renderDropdown(this.options.data, val);
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}
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// Open dropdown
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if (!this.dropdown.isOpen) {
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this.dropdown.open();
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} else {
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// Recalculate dropdown when its already open
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this.dropdown.recalculateDimensions();
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}
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}
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/**
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* Close Autocomplete Dropdown
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*/
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close() {
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this.dropdown.close();
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}
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/**
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* Update Data
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* @param {Object} data
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*/
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updateData(data) {
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let val = this.el.value.toLowerCase();
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this.options.data = data;
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if (this.isOpen) {
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this._renderDropdown(data, val);
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}
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}
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}
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/**
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* @static
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* @memberof Autocomplete
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*/
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Autocomplete._keydown = false;
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M.Autocomplete = Autocomplete;
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if (M.jQueryLoaded) {
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M.initializeJqueryWrapper(Autocomplete, 'autocomplete', 'M_Autocomplete');
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}
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})(cash);
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