mirror of
https://github.com/Choices-js/Choices.git
synced 2024-05-17 13:06:34 +02:00
1475 lines
53 KiB
JavaScript
1475 lines
53 KiB
JavaScript
'use strict';
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import { addItem, removeItem, selectItem, addChoice, filterChoices, activateChoices, addGroup, clearAll } from './actions/index';
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import { isScrolledIntoView, getAdjacentEl, findAncestor, wrap, isType, strToEl, extend, getWidthOfInput, debounce } from './lib/utils.js';
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import Fuse from 'fuse.js';
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import Store from './store/index.js';
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/**
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* Choices
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*
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* To do:
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* - Pagination
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* - Single select box search in dropdown
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*/
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export class Choices {
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constructor(element = '[data-choice]', userOptions = {}) {
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// If there are multiple elements, create a new instance
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// for each element besides the first one (as that already has an instance)
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if(isType('String', element)) {
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const elements = document.querySelectorAll(element);
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if(elements.length > 1) {
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for (let i = 1; i < elements.length; i++) {
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const el = elements[i];
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new Choices(el, userOptions);
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}
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}
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}
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const defaultOptions = {
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items: [],
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maxItemCount: -1,
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addItems: true,
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removeItems: true,
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removeItemButton: false,
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editItems: false,
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duplicateItems: true,
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delimiter: ',',
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paste: true,
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searchOptions: true,
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regexFilter: null,
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placeholder: true,
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placeholderValue: null,
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prependValue: null,
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appendValue: null,
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loadingText: 'Loading...',
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templates: {},
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classNames: {
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containerOuter: 'choices',
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containerInner: 'choices__inner',
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input: 'choices__input',
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inputCloned: 'choices__input--cloned',
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list: 'choices__list',
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listItems: 'choices__list--multiple',
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listSingle: 'choices__list--single',
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listDropdown: 'choices__list--dropdown',
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item: 'choices__item',
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itemSelectable: 'choices__item--selectable',
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itemDisabled: 'choices__item--disabled',
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itemChoice: 'choices__item--choice',
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group: 'choices__group',
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groupHeading : 'choices__heading',
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button: 'choices__button',
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activeState: 'is-active',
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focusState: 'is-focused',
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openState: 'is-open',
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disabledState: 'is-disabled',
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highlightedState: 'is-highlighted',
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hiddenState: 'is-hidden',
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flippedState: 'is-flipped',
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selectedState: 'is-selected',
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},
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callbackOnInit: () => {},
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callbackOnAddItem: (id, value, passedInput) => {},
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callbackOnRemoveItem: (id, value, passedInput) => {},
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};
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// Merge options with user options
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this.options = extend(defaultOptions, userOptions);
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// Create data store
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this.store = new Store(this.render);
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// State tracking
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this.initialised = false;
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this.currentState = {};
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this.prevState = {};
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this.currentValue = '';
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// Retrieve triggering element (i.e. element with 'data-choice' trigger)
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this.passedElement = isType('String', element) ? document.querySelector(element) : element;
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this.highlightPosition = 0;
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this.canSearch = this.options.searchOptions;
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// Assign preset items from passed object first
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this.presetItems = this.options.items;
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// Then add any values passed from attribute
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if(this.passedElement.value !== '') {
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this.presetItems = this.presetItems.concat(this.passedElement.value.split(this.options.delimiter));
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}
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// Bind methods
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this.init = this.init.bind(this);
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this.render = this.render.bind(this);
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this.destroy = this.destroy.bind(this);
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this.disable = this.disable.bind(this);
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// Bind event handlers
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this._onFocus = this._onFocus.bind(this);
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this._onBlur = this._onBlur.bind(this);
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this._onKeyUp = this._onKeyUp.bind(this);
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this._onKeyDown = this._onKeyDown.bind(this);
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this._onMouseDown = this._onMouseDown.bind(this);
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this._onMouseOver = this._onMouseOver.bind(this);
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this._onPaste = this._onPaste.bind(this);
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this._onInput = this._onInput.bind(this);
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// Cutting the mustard
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const cuttingTheMustard = 'querySelector' in document && 'addEventListener' in document && 'classList' in document.createElement("div");
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if (!cuttingTheMustard) console.error('Choices: Your browser doesn\'t support Choices');
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// Input type check
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const canInit = this.passedElement && ['select-one', 'select-multiple', 'text'].includes(this.passedElement.type);
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if(canInit) {
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// Let's have it large
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this.init();
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} else {
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console.error('Choices: Incompatible input passed');
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}
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}
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/**
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* Initialise Choices
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* @return
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* @public
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*/
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init(callback) {
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if(this.initialised !== true) {
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this.initialised = true;
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// Create required elements
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this._createTemplates();
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// Generate input markup
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this._createInput();
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this.store.subscribe(this.render);
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// Render any items
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this.render();
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// Trigger event listeners
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this._addEventListeners();
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// Run callback if it is a function
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if(callback = this.options.callbackOnInit){
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if(isType('Function', callback)) {
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callback();
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} else {
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console.error('callbackOnInit: Callback is not a function');
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}
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}
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}
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}
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/**
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* Destroy Choices and nullify values
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* @return
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* @public
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*/
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destroy() {
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this.passedElement.classList.remove(this.options.classNames.input, this.options.classNames.hiddenState);
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this.passedElement.tabIndex = '';
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this.passedElement.removeAttribute('style', 'display:none;');
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this.passedElement.removeAttribute('aria-hidden');
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this.containerOuter.outerHTML = this.passedElement.outerHTML;
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this.passedElement = null;
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this.userOptions = null;
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this.options = null;
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this.store = null;
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this._removeEventListeners();
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}
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/**
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* Select item (a selected item can be deleted)
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* @param {Element} item Element to select
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* @return {Object} Class instance
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* @public
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*/
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selectItem(item) {
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if(!item) return;
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const id = item.id;
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this.store.dispatch(selectItem(id, true));
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return this;
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}
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/**
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* Deselect item
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* @param {Element} item Element to de-select
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* @return {Object} Class instance
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* @public
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*/
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deselectItem(item) {
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if(!item) return;
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const id = item.id;
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this.store.dispatch(selectItem(id, false));
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return this;
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}
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/**
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* Highlight items within store
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* @return {Object} Class instance
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* @public
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*/
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highlightAll() {
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const items = this.store.getItems();
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items.forEach((item) => {
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this.selectItem(item);
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});
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return this;
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}
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/**
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* Deselect items within store
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* @return {Object} Class instance
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* @public
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*/
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deselectAll() {
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const items = this.store.getItems();
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items.forEach((item) => {
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this.deselectItem(item);
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});
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return this;
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}
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/**
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* Remove an item from the store by its value
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* @param {String} value Value to search for
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* @return {Object} Class instance
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* @public
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*/
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removeItemsByValue(value) {
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if(!value || !isType('String', value)) console.error('removeItemsByValue: No value was passed to be removed'); return;
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const items = this.store.getItemsFilteredByActive();
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items.forEach((item) => {
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if(item.value === value) {
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this._removeItem(item);
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}
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});
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return this;
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}
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/**
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* Remove all items from store array
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* Note: removed items are soft deleted
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* @param {Number} excludedId Optionally exclude item by ID
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* @return {Object} Class instance
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* @public
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*/
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removeActiveItems(excludedId) {
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const items = this.store.getItemsFilteredByActive();
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items.forEach((item) => {
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if(item.active && excludedId !== item.id) {
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this._removeItem(item);
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}
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});
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return this;
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}
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/**
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* Remove all selected items from store
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* Note: removed items are soft deleted
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* @return {Object} Class instance
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* @public
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*/
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removeSelectedItems() {
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const items = this.store.getItemsFilteredByActive();
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items.forEach((item) => {
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if(item.selected && item.active) {
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this._removeItem(item);
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}
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});
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return this;
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}
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/**
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* Show dropdown to user by adding active state class
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* @return {Object} Class instance
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* @public
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*/
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showDropdown() {
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this.containerOuter.classList.add(this.options.classNames.openState);
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this.dropdown.classList.add(this.options.classNames.activeState);
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const dimensions = this.dropdown.getBoundingClientRect();
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const shouldFlip = dimensions.top + dimensions.height >= document.body.offsetHeight;
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// Whether or not the dropdown should appear above or below input
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if(shouldFlip) {
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this.containerOuter.classList.add(this.options.classNames.flippedState);
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} else {
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this.containerOuter.classList.remove(this.options.classNames.flippedState);
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}
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return this;
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}
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/**
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* Hide dropdown from user
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* @return {Object} Class instance
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* @public
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*/
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hideDropdown() {
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// A dropdown flips if it does not have space below the input
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const isFlipped = this.containerOuter.classList.contains(this.options.classNames.flippedState);
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this.containerOuter.classList.remove(this.options.classNames.openState);
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this.dropdown.classList.remove(this.options.classNames.activeState);
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if(isFlipped) {
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this.containerOuter.classList.remove(this.options.classNames.flippedState);
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}
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return this;
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}
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/**
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* Determine whether to hide or show dropdown based on its current state
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* @return {Object} Class instance
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* @public
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*/
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toggleDropdown() {
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const isActive = this.dropdown.classList.contains(this.options.classNames.activeState);
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isActive ? this.hideDropdown() : this.showDropdown();
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return this;
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}
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/**
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* Set value of input
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* @param {Array} args Array of value objects or value strings
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* @return {Object} Class instance
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* @public
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*/
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setValue(args) {
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// Convert args to an itterable array
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const values = [...args];
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values.forEach((item, index) => {
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if(isType('Object', item)) {
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if(!item.value) return;
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// If we are dealing with a select input, we need to create an option first
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// that is then selected. For text inputs we can just add items normally.
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if(this.passedElement.type !== 'text') {
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this._addChoice(true, false, item.value, item.label, -1);
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} else {
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this._addItem(item.value, item.label, item.id);
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}
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} else if(isType('String', item)) {
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if(this.passedElement.type !== 'text') {
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this._addChoice(true, false, item, item, -1);
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} else {
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this._addItem(item);
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}
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}
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});
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return this;
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}
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/**
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* Clear value of inputs
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* @return {Object} Class instance
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* @public
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*/
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clearValue() {
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this.store.dispatch(clearAll());
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return this;
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}
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/**
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* Disable
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* @return {Object} Class instance
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* @public
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*/
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disable() {
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this.passedElement.disabled = true;
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if(this.initialised) {
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this.input.disabled = true;
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this.containerOuter.classList.add(this.options.classNames.disabledState);
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}
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return this;
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}
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/**
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* Populate options via ajax callback
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* @param {Function} fn Passed
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* @return {Object} Class instance
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* @public
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*/
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ajax(fn) {
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this.containerOuter.classList.add('is-loading');
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// this.input.placeholder = this.options.loadingText;
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const placeholderItem = this._getTemplate('item', { id: -1, value: 'Loading', label: this.options.loadingText, active: true});
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this.itemList.appendChild(placeholderItem);
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const callback = (results, value, label) => {
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if(results && results.length) {
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this.containerOuter.classList.remove('is-loading');
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this.input.placeholder = "";
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results.forEach((result, index) => {
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// Add each result to option dropdown
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if(index === 0) {
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this._addItem(result[value], result[label], index);
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}
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this._addChoice(false, false, result[value], result[label]);
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});
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}
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};
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fn(callback);
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return this;
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}
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/**
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* Set value of input to blank
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* @return {Object} Class instance
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* @public
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*/
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clearInput() {
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if (this.input.value) this.input.value = '';
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if(this.passedElement.type !== 'select-one') {
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this.input.style.width = getWidthOfInput(this.input);
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}
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return this;
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}
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/**
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* Process enter key event
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* @param {Array} activeItems Items that are currently active
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* @return
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* @private
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*/
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_handleEnter(activeItems, value) {
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let canUpdate = true;
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if(this.options.addItems) {
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if (this.options.maxItemCount && this.options.maxItemCount > 0 && this.options.maxItemCount <= this.itemList.children.length) {
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// If there is a max entry limit and we have reached that limit
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// don't update
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canUpdate = false;
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} else if(this.options.duplicateItems === false && this.passedElement.value) {
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// If no duplicates are allowed, and the value already exists
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// in the array, don't update
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canUpdate = !activeItems.some((item) => item.value === value );
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}
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} else {
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canUpdate = false;
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}
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if (canUpdate) {
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let canAddItem = true;
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// If a user has supplied a regular expression filter
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if(this.options.regexFilter) {
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// Determine whether we can update based on whether
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// our regular expression passes
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canAddItem = this._regexFilter(value);
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}
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// All is good, add
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if(canAddItem) {
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this.toggleDropdown();
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this._addItem(value);
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this.clearInput(this.passedElement);
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}
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}
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};
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/**
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* Process back space event
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* @param {Array} Active items
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* @return
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* @private
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*/
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_handleBackspace(activeItems) {
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if(this.options.removeItems && activeItems) {
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const lastItem = activeItems[activeItems.length - 1];
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const hasSelectedItems = activeItems.some((item) => item.selected === true);
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// If editing the last item is allowed and there are not other selected items,
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// we can edit the item value. Otherwise if we can remove items, remove all selected items
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if(this.options.editItems && !hasSelectedItems && lastItem) {
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this.input.value = lastItem.value;
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this._removeItem(lastItem);
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} else {
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if(!hasSelectedItems) { this.selectItem(lastItem); }
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this.removeSelectedItems();
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}
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}
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};
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/**
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* Key down event
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* @param {Object} e Event
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* @return
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*/
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_onKeyDown(e) {
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if(e.target !== this.input) return;
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const ctrlDownKey = e.ctrlKey || e.metaKey;
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const backKey = 46;
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const deleteKey = 8;
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const enterKey = 13;
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const aKey = 65;
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const escapeKey = 27;
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const upKey = 38;
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const downKey = 40;
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const activeItems = this.store.getItemsFilteredByActive();
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const activeChoices = this.store.getChoicesFilteredByActive();
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const hasFocusedInput = this.input === document.activeElement;
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const hasActiveDropdown = this.dropdown.classList.contains(this.options.classNames.activeState);
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const hasItems = this.itemList && this.itemList.children;
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const keyString = String.fromCharCode(event.keyCode);
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// If a user is typing and the dropdown is not active
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if(this.passedElement.type !== 'text' && /[a-zA-Z0-9-_ ]/.test(keyString) && !hasActiveDropdown) {
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this.showDropdown();
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}
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this.canSearch = this.options.searchOptions;
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switch (e.keyCode) {
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case aKey:
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// If CTRL + A or CMD + A have been pressed and there are items to select
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if(ctrlDownKey && hasItems) {
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this.canSearch = false;
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if(this.options.removeItems && !this.input.value && this.input === document.activeElement) {
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// Highlight items
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this.highlightAll(this.itemList.children);
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}
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}
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break;
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case enterKey:
|
|
// If enter key is pressed and the input has a value
|
|
if(e.target.value && this.passedElement.type === 'text') {
|
|
const value = this.input.value;
|
|
this._handleEnter(activeItems, value);
|
|
}
|
|
|
|
if(hasActiveDropdown) {
|
|
const highlighted = this.dropdown.querySelector(`.${this.options.classNames.highlightedState}`);
|
|
|
|
if(highlighted) {
|
|
const value = highlighted.getAttribute('data-value');
|
|
const label = highlighted.innerHTML;
|
|
const id = highlighted.getAttribute('data-id');
|
|
this._addItem(value, label, id);
|
|
this.clearInput(this.passedElement);
|
|
|
|
if(this.passedElement.type === 'select-one') {
|
|
this.isSearching = false;
|
|
this.store.dispatch(activateChoices());
|
|
this.toggleDropdown();
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case escapeKey:
|
|
if(hasActiveDropdown) {
|
|
this.toggleDropdown();
|
|
}
|
|
break;
|
|
|
|
case downKey:
|
|
case upKey:
|
|
// If up or down key is pressed, traverse through options
|
|
if(hasActiveDropdown) {
|
|
const currentEl = this.dropdown.querySelector(`.${this.options.classNames.highlightedState}`);
|
|
const directionInt = e.keyCode === downKey ? 1 : -1;
|
|
let nextEl;
|
|
|
|
this.canSearch = false;
|
|
|
|
if(currentEl) {
|
|
nextEl = getAdjacentEl(currentEl, '[data-option-selectable]', directionInt);
|
|
} else {
|
|
nextEl = this.dropdown.querySelector('[data-option-selectable]');
|
|
}
|
|
|
|
if(nextEl) {
|
|
// We prevent default to stop the cursor moving
|
|
// when pressing the arrow
|
|
if(!isScrolledIntoView(nextEl, this.choiceList, directionInt)) {
|
|
this._scrollToChoice(nextEl, directionInt);
|
|
}
|
|
this._highlightChoice(nextEl);
|
|
}
|
|
|
|
// Prevent default to maintain cursor position whilst
|
|
// traversing dropdown options
|
|
e.preventDefault();
|
|
}
|
|
break
|
|
|
|
case backKey:
|
|
case deleteKey:
|
|
// If backspace or delete key is pressed and the input has no value
|
|
if(hasFocusedInput && !e.target.value && this.passedElement.type !== 'select-one') {
|
|
this._handleBackspace(activeItems);
|
|
e.preventDefault();
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Key up event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onKeyUp(e) {
|
|
if(e.target !== this.input) return;
|
|
const keyString = String.fromCharCode(event.keyCode);
|
|
|
|
// We are typing into a text input and have a value, we want to show a dropdown
|
|
// notice. Otherwise hide the dropdown
|
|
if(this.passedElement.type === 'text') {
|
|
const hasActiveDropdown = this.dropdown.classList.contains(this.options.classNames.activeState);
|
|
let dropdownItem;
|
|
if(this.input.value) {
|
|
const activeItems = this.store.getItemsFilteredByActive();
|
|
const isUnique = !activeItems.some((item) => item.value === this.input.value);
|
|
|
|
if (this.options.maxItemCount && this.options.maxItemCount > 0 && this.options.maxItemCount <= this.itemList.children.length) {
|
|
dropdownItem = this._getTemplate('notice', `Only ${ this.options.maxItemCount } options can be added.`);
|
|
} else if(!this.options.duplicateItems && !isUnique) {
|
|
dropdownItem = this._getTemplate('notice', `Only unique values can be added.`);
|
|
} else {
|
|
dropdownItem = this._getTemplate('notice', `Add "${ this.input.value }"`);
|
|
}
|
|
|
|
if((this.options.regexFilter && this._regexFilter(this.input.value)) || !this.options.regexFilter) {
|
|
this.dropdown.innerHTML = dropdownItem.outerHTML;
|
|
if(!this.dropdown.classList.contains(this.options.classNames.activeState)) {
|
|
this.showDropdown();
|
|
}
|
|
}
|
|
|
|
} else {
|
|
if(hasActiveDropdown) this.hideDropdown();
|
|
}
|
|
}
|
|
|
|
// If we have enabled text search
|
|
if(this.canSearch) {
|
|
if(this.input === document.activeElement) {
|
|
const options = this.store.getChoices();
|
|
const hasUnactiveChoices = options.some((option) => option.active !== true);
|
|
|
|
// Check that we have a value to search and the input was an alphanumeric character
|
|
if(this.input.value && options.length && /[a-zA-Z0-9-_ ]/.test(keyString)) {
|
|
const handleFilter = () => {
|
|
const newValue = this.input.value.trim();
|
|
const currentValue = this.currentValue.trim();
|
|
|
|
if(newValue.length >= 1 && newValue !== currentValue + ' ') {
|
|
const haystack = this.store.getChoicesFiltedBySelectable();
|
|
const needle = newValue;
|
|
const fuse = new Fuse(haystack, {
|
|
keys: ['label', 'value'],
|
|
shouldSort: true,
|
|
include: 'score',
|
|
});
|
|
const results = fuse.search(needle);
|
|
|
|
this.currentValue = newValue;
|
|
this.highlightPosition = 0;
|
|
this.isSearching = true;
|
|
this.store.dispatch(filterChoices(results));
|
|
}
|
|
};
|
|
|
|
handleFilter();
|
|
} else if(hasUnactiveChoices) {
|
|
// Otherwise reset options to active
|
|
this.isSearching = false;
|
|
this.store.dispatch(activateChoices());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Input event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onInput(e) {
|
|
if(this.passedElement.type !== 'select-one') {
|
|
this.input.style.width = getWidthOfInput(this.input);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Click event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onMouseDown(e) {
|
|
// If not a right click
|
|
if(e.button !== 2) {
|
|
const activeItems = this.store.getItemsFilteredByActive();
|
|
|
|
// If click is affecting a child node of our element
|
|
if(this.containerOuter.contains(e.target)) {
|
|
|
|
// Prevent blur event triggering causing dropdown to close
|
|
// in a race condition
|
|
e.preventDefault();
|
|
|
|
const hasShiftKey = e.shiftKey ? true : false;
|
|
|
|
if(this.passedElement.type !== 'text' && !this.dropdown.classList.contains(this.options.classNames.activeState)) {
|
|
// For select inputs we always want to show the dropdown if it isn't already showing
|
|
this.showDropdown();
|
|
}
|
|
|
|
// If input is not in focus, it ought to be
|
|
if(this.input !== document.activeElement) {
|
|
this.input.focus();
|
|
}
|
|
|
|
if(e.target.hasAttribute('data-button')) {
|
|
if(this.options.removeItems && this.options.removeItemButton) {
|
|
const itemId = e.target.parentNode.getAttribute('data-id');
|
|
const itemToRemove = activeItems.find((item) => item.id === parseInt(itemId));
|
|
this._removeItem(itemToRemove);
|
|
}
|
|
} else if(e.target.hasAttribute('data-item')) {
|
|
// If we are clicking on an item
|
|
if(this.options.removeItems) {
|
|
const passedId = e.target.getAttribute('data-id');
|
|
|
|
// We only want to select one item with a click
|
|
// so we deselect any items that aren't the target
|
|
// unless shift is being pressed
|
|
activeItems.forEach((item) => {
|
|
if(item.id === parseInt(passedId) && !item.selected) {
|
|
this.selectItem(item);
|
|
} else if(!hasShiftKey) {
|
|
this.deselectItem(item);
|
|
}
|
|
});
|
|
}
|
|
} else if(e.target.hasAttribute('data-option')) {
|
|
// If we are clicking on an option
|
|
const options = this.store.getChoicesFilteredByActive();
|
|
const id = e.target.getAttribute('data-id');
|
|
const option = options.find((option) => option.id === parseInt(id));
|
|
|
|
if(!option.selected && !option.disabled) {
|
|
this._addItem(option.value, option.label, option.id);
|
|
if(this.passedElement.type === 'select-one') {
|
|
this.input.value = "";
|
|
this.isSearching = false;
|
|
this.store.dispatch(activateChoices(true));
|
|
this.toggleDropdown();
|
|
}
|
|
}
|
|
}
|
|
|
|
} else {
|
|
// Click is outside of our element so close dropdown and de-select items
|
|
const hasActiveDropdown = this.dropdown.classList.contains(this.options.classNames.activeState);
|
|
const hasSelectedItems = activeItems.some((item) => item.selected === true);
|
|
|
|
// De-select any highlighted items
|
|
if(hasSelectedItems) this.unhighlightAll();
|
|
|
|
// Remove focus state
|
|
this.containerOuter.classList.remove(this.options.classNames.focusState);
|
|
|
|
// Close all other dropdowns
|
|
if(hasActiveDropdown) this.toggleDropdown();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Mouse over (hover) event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onMouseOver(e) {
|
|
// If the dropdown is either the target or one of its children is the target
|
|
if((e.target === this.dropdown || findAncestor(e.target, this.options.classNames.listDropdown))) {
|
|
if(e.target.hasAttribute('data-option')) {
|
|
this._highlightChoice(e.target);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Paste event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onPaste(e) {
|
|
if(e.target !== this.input) return;
|
|
// Disable pasting into the input if option has been set
|
|
if(!this.options.paste) {
|
|
e.preventDefault();
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Focus event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onFocus(e) {
|
|
const hasActiveDropdown = this.dropdown.classList.contains(this.options.classNames.activeState);
|
|
if(e.target === this.input && !hasActiveDropdown) {
|
|
this.containerOuter.classList.add(this.options.classNames.focusState);
|
|
if(this.passedElement.type === 'select-one' || this.passedElement.type === 'select-multiple'){
|
|
this.showDropdown();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Blur event
|
|
* @param {Object} e Event
|
|
* @return
|
|
* @private
|
|
*/
|
|
_onBlur(e) {
|
|
const hasActiveDropdown = this.dropdown.classList.contains(this.options.classNames.activeState);
|
|
if(e.target === this.input && !hasActiveDropdown) {
|
|
this.containerOuter.classList.remove(this.options.classNames.focusState);
|
|
} else {
|
|
this.hideDropdown();
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Tests value against a regular expression
|
|
* @param {string} value Value to test
|
|
* @return {Boolean} Whether test passed/failed
|
|
* @private
|
|
*/
|
|
_regexFilter(value) {
|
|
if(!value) return;
|
|
const expression = new RegExp(this.options.regexFilter, 'i');
|
|
return expression.test(value);
|
|
}
|
|
|
|
/**
|
|
* Scroll to an option element
|
|
* @param {HTMLElement} option Option to scroll to
|
|
* @param {Number} direction Whether option is above or below
|
|
* @return
|
|
* @private
|
|
*/
|
|
_scrollToChoice(option, direction) {
|
|
if(!option) return;
|
|
|
|
const dropdownHeight = this.choiceList.offsetHeight;
|
|
const optionHeight = option.offsetHeight;
|
|
|
|
// Distance from bottom of element to top of parent
|
|
const choicePos = option.offsetTop + optionHeight;
|
|
|
|
// Scroll position of dropdown
|
|
const containerScrollPos = this.choiceList.scrollTop + dropdownHeight;
|
|
|
|
// Difference between the option and scroll position
|
|
let endPoint = direction > 0 ? ((this.choiceList.scrollTop + choicePos) - containerScrollPos) : option.offsetTop;
|
|
|
|
const animateScroll = (time, endPoint, direction) => {
|
|
let continueAnimation = false;
|
|
let easing, distance;
|
|
const strength = 4;
|
|
|
|
if(direction > 0) {
|
|
easing = (endPoint - this.choiceList.scrollTop)/strength;
|
|
distance = easing > 1 ? easing : 1;
|
|
|
|
this.choiceList.scrollTop = this.choiceList.scrollTop + distance;
|
|
if(this.choiceList.scrollTop < endPoint) {
|
|
continueAnimation = true;
|
|
}
|
|
} else {
|
|
easing = (this.choiceList.scrollTop - endPoint)/strength;
|
|
distance = easing > 1 ? easing : 1;
|
|
|
|
this.choiceList.scrollTop = this.choiceList.scrollTop - distance;
|
|
if(this.choiceList.scrollTop > endPoint) {
|
|
continueAnimation = true;
|
|
}
|
|
}
|
|
|
|
if(continueAnimation) {
|
|
requestAnimationFrame((time) => {
|
|
animateScroll(time, endPoint, direction);
|
|
});
|
|
}
|
|
};
|
|
|
|
requestAnimationFrame((time) => {
|
|
animateScroll(time, endPoint, direction);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Highlight option element
|
|
* @param {HTMLElement} el Element to highlight
|
|
* @return
|
|
* @private
|
|
*/
|
|
_highlightChoice(el) {
|
|
// Highlight first element in dropdown
|
|
const options = Array.from(this.dropdown.querySelectorAll('[data-option-selectable]'));
|
|
|
|
if(options && options.length) {
|
|
const highlightedOptions = Array.from(this.dropdown.querySelectorAll(`.${this.options.classNames.highlightedState}`));
|
|
|
|
// Remove any highlighted options
|
|
highlightedOptions.forEach((el) => {
|
|
el.classList.remove(this.options.classNames.highlightedState);
|
|
});
|
|
|
|
if(el){
|
|
// Highlight given option
|
|
el.classList.add(this.options.classNames.highlightedState);
|
|
this.highlightPosition = options.indexOf(el);
|
|
} else {
|
|
// Highlight option based on last known highlight location
|
|
let el;
|
|
|
|
if(options.length > this.highlightPosition) {
|
|
// If we have an option to highlight
|
|
el = options[this.highlightPosition];
|
|
} else {
|
|
// Otherwise highlight the option before
|
|
el = options[options.length - 1];
|
|
}
|
|
|
|
if(!el) el = options[0];
|
|
el.classList.add(this.options.classNames.highlightedState);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Add item to store with correct value
|
|
* @param {String} value Value to add to store
|
|
* @return {Object} Class instance
|
|
* @public
|
|
*/
|
|
_addItem(value, label, choiceId = -1, callback = this.options.callbackOnAddItem) {
|
|
const items = this.store.getItems();
|
|
let passedValue = value.trim();
|
|
let passedLabel = label || passedValue;
|
|
let passedOptionId = choiceId || -1;
|
|
|
|
// If a prepended value has been passed, prepend it
|
|
if(this.options.prependValue) {
|
|
passedValue = this.options.prependValue + passedValue.toString();
|
|
}
|
|
|
|
// If an appended value has been passed, append it
|
|
if(this.options.appendValue) {
|
|
passedValue = passedValue + this.options.appendValue.toString();
|
|
}
|
|
|
|
// Generate unique id
|
|
const id = items ? items.length + 1 : 1;
|
|
|
|
this.store.dispatch(addItem(passedValue, passedLabel, id, passedOptionId));
|
|
|
|
if(this.passedElement.type === 'select-one') {
|
|
this.removeActiveItems(id);
|
|
}
|
|
|
|
// Run callback if it is a function
|
|
if(callback){
|
|
if(isType('Function', callback)) {
|
|
callback(id, passedValue, this.passedElement);
|
|
} else {
|
|
console.error('callbackOnAddItem: Callback is not a function');
|
|
}
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Remove item from store
|
|
* @param
|
|
* @return {Object} Class instance
|
|
* @public
|
|
*/
|
|
_removeItem(item, callback = this.options.callbackOnRemoveItem) {
|
|
if(!item || !isType('Object', item)) {
|
|
console.error('removeItem: No item object was passed to be removed');
|
|
return;
|
|
}
|
|
|
|
const id = item.id;
|
|
const value = item.value;
|
|
const choiceId = item.choiceId;
|
|
|
|
this.store.dispatch(removeItem(id, choiceId));
|
|
|
|
// Run callback
|
|
if(callback){
|
|
if(!isType('Function', callback)) console.error('callbackOnRemoveItem: Callback is not a function'); return;
|
|
callback(id, value, this.passedElement);
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Add choice to dropdoww
|
|
* @return
|
|
* @private
|
|
*/
|
|
_addChoice(isSelected, isDisabled, value, label, groupId = -1) {
|
|
if(!value) return
|
|
|
|
if(!label) { label = value; }
|
|
|
|
// Generate unique id
|
|
const choices = this.store.getChoices();
|
|
const id = choices ? choices.length + 1 : 1;
|
|
|
|
this.store.dispatch(addChoice(value, label, id, groupId, isDisabled));
|
|
|
|
if(isSelected && !isDisabled) {
|
|
this._addItem(value, label, id);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add group to dropdown
|
|
* @param {Object} group Group to add
|
|
* @param {Number} index Whether this is the first group to add
|
|
* @return
|
|
* @private
|
|
*/
|
|
_addGroup(group, id, isFirst) {
|
|
const groupOptions = Array.from(group.getElementsByTagName('OPTION'));
|
|
const groupId = id;
|
|
|
|
if(groupOptions) {
|
|
this.store.dispatch(addGroup(group.label, groupId, true, group.disabled));
|
|
groupOptions.forEach((option, optionIndex) => {
|
|
const isDisabled = option.disabled || option.parentNode.disabled;
|
|
this._addChoice(option.selected, isDisabled, option.value, option.innerHTML, groupId);
|
|
});
|
|
} else {
|
|
this.store.dispatch(addGroup(group.label, group.id, false, group.disabled));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get template from name
|
|
* @param {String} template Name of template to get
|
|
* @param {...} args Data to pass to template
|
|
* @return {HTMLElement} Template
|
|
* @private
|
|
*/
|
|
_getTemplate(template, ...args) {
|
|
if(!template) return;
|
|
const templates = this.options.templates;
|
|
return templates[template](...args);
|
|
}
|
|
|
|
/**
|
|
* Create HTML element based on type and arguments
|
|
* @return
|
|
* @private
|
|
*/
|
|
_createTemplates() {
|
|
const classNames = this.options.classNames;
|
|
const templates = {
|
|
containerOuter: () => {
|
|
return strToEl(`<div class="${ classNames.containerOuter }" data-type="${ this.passedElement.type }"></div>`);
|
|
},
|
|
containerInner: () => {
|
|
return strToEl(`<div class="${ classNames.containerInner }"></div>`);
|
|
},
|
|
itemList: () => {
|
|
return strToEl(`<div class="${ classNames.list } ${ this.passedElement.type === 'select-one' ? classNames.listSingle : classNames.listItems }"></div>`);
|
|
},
|
|
choiceList: () => {
|
|
return strToEl(`<div class="${ classNames.list }"></div>`);
|
|
},
|
|
input: () => {
|
|
return strToEl(`<input type="text" class="${ classNames.input } ${ classNames.inputCloned }">`);
|
|
},
|
|
dropdown: () => {
|
|
return strToEl(`<div class="${ classNames.list } ${ classNames.listDropdown }"></div>`);
|
|
},
|
|
notice: (label, clickable) => {
|
|
return strToEl(`<div class="${ classNames.item } ${ classNames.itemChoice }">${ label }</div>`);
|
|
},
|
|
selectOption: (data) => {
|
|
return strToEl(`<option value="${ data.value }" selected>${ data.label.trim() }</option>`);
|
|
},
|
|
option: (data) => {
|
|
return strToEl(`
|
|
<div class="${ classNames.item } ${ classNames.itemChoice } ${ data.disabled ? classNames.itemDisabled : classNames.itemSelectable }" data-option ${ data.disabled ? 'data-option-disabled' : 'data-option-selectable' } data-id="${ data.id }" data-value="${ data.value }">
|
|
${ data.label }
|
|
</div>
|
|
`);
|
|
},
|
|
optgroup: (data) => {
|
|
return strToEl(`
|
|
<div class="${ classNames.group } ${ data.disabled ? classNames.itemDisabled : '' }" data-group data-id="${ data.id }" data-value="${ data.value }">
|
|
<div class="${ classNames.groupHeading }">${ data.value }</div>
|
|
</div>
|
|
`);
|
|
},
|
|
item: (data) => {
|
|
if(this.options.removeItemButton && this.passedElement.type !== 'select-one') {
|
|
return strToEl(`
|
|
<div class="${ classNames.item } ${ data.selected ? classNames.selectedState : ''} ${ !data.disabled ? classNames.itemSelectable : '' }" data-item data-id="${ data.id }" data-value="${ data.value }" data-deletable>
|
|
${ data.label }
|
|
<button class="${ classNames.button }" data-button>Remove item</button>
|
|
</div>
|
|
`);
|
|
} else {
|
|
return strToEl(`
|
|
<div class="${ classNames.item } ${ data.selected ? classNames.selectedState : classNames.itemSelectable }" data-item data-id="${ data.id }" data-value="${ data.value }">
|
|
${ data.label }
|
|
</div>
|
|
`);
|
|
}
|
|
},
|
|
};
|
|
|
|
this.options.templates = extend(this.options.templates, templates);
|
|
}
|
|
|
|
/**
|
|
* Create DOM structure around passed select element
|
|
* @return
|
|
* @private
|
|
*/
|
|
_createInput() {
|
|
const containerOuter = this._getTemplate('containerOuter');
|
|
const containerInner = this._getTemplate('containerInner');
|
|
const itemList = this._getTemplate('itemList');
|
|
const choiceList = this._getTemplate('choiceList');
|
|
const input = this._getTemplate('input');
|
|
const dropdown = this._getTemplate('dropdown');
|
|
|
|
this.containerOuter = containerOuter;
|
|
this.containerInner = containerInner;
|
|
this.input = input;
|
|
this.choiceList = choiceList;
|
|
this.itemList = itemList;
|
|
this.dropdown = dropdown;
|
|
|
|
// Hide passed input
|
|
this.passedElement.classList.add(this.options.classNames.input, this.options.classNames.hiddenState);
|
|
this.passedElement.tabIndex = '-1';
|
|
this.passedElement.setAttribute('style', 'display:none;');
|
|
this.passedElement.setAttribute('aria-hidden', 'true');
|
|
this.passedElement.removeAttribute('data-choice');
|
|
|
|
// Wrap input in container preserving DOM ordering
|
|
wrap(this.passedElement, containerInner);
|
|
|
|
// Wrapper inner container with outer container
|
|
wrap(containerInner, containerOuter);
|
|
|
|
// If placeholder has been enabled and we have a value
|
|
if (this.options.placeholder && (this.options.placeholderValue || this.passedElement.placeholder)) {
|
|
const placeholder = this.options.placeholderValue || this.passedElement.placeholder;
|
|
input.placeholder = placeholder;
|
|
if(this.passedElement.type !== 'select-one') {
|
|
input.style.width = getWidthOfInput(input);
|
|
}
|
|
}
|
|
|
|
if(!this.options.addItems) this.disable();
|
|
|
|
containerOuter.appendChild(containerInner);
|
|
containerOuter.appendChild(dropdown);
|
|
containerInner.appendChild(itemList);
|
|
dropdown.appendChild(choiceList);
|
|
|
|
if(this.passedElement.type === 'select-multiple' || this.passedElement.type === 'text') {
|
|
containerInner.appendChild(input);
|
|
} else if(this.options.searchOptions) {
|
|
dropdown.insertBefore(input, dropdown.firstChild);
|
|
}
|
|
|
|
if(this.passedElement.type === 'select-multiple' || this.passedElement.type === 'select-one') {
|
|
this.highlightPosition = 0;
|
|
|
|
const passedGroups = Array.from(this.passedElement.getElementsByTagName('OPTGROUP'));
|
|
|
|
this.isSearching = false;
|
|
|
|
if(passedGroups && passedGroups.length) {
|
|
passedGroups.forEach((group, index) => {
|
|
const isFirst = index === 0 ? true : false;
|
|
this._addGroup(group, index, isFirst);
|
|
});
|
|
} else {
|
|
const passedOptions = Array.from(this.passedElement.options);
|
|
passedOptions.forEach((option) => {
|
|
const isDisabled = option.disabled || option.parentNode.disabled;
|
|
this._addChoice(option.selected, isDisabled, option.value, option.innerHTML);
|
|
});
|
|
}
|
|
|
|
} else if(this.passedElement.type === 'text') {
|
|
// Add any preset values seperated by delimiter
|
|
this.presetItems.forEach((item) => {
|
|
if(isType('Object', item)) {
|
|
if(!item.value) return;
|
|
this._addItem(item.value, item.label, item.id);
|
|
} else if(isType('String', item)) {
|
|
this._addItem(item);
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Render group options into a DOM fragment and append to options list
|
|
* @param {Array} groups Groups to add to list
|
|
* @param {Array} options Options to add to groups
|
|
* @param {DocumentFragment} fragment Fragment to add groups and options to (optional)
|
|
* @return {DocumentFragment} Populated options fragment
|
|
* @private
|
|
*/
|
|
renderGroups(groups, options, fragment) {
|
|
const groupFragment = fragment || document.createDocumentFragment();
|
|
|
|
groups.forEach((group, i) => {
|
|
// Grab options that are children of this group
|
|
const groupOptions = options.filter((option) => {
|
|
if(this.passedElement.type === 'select-one') {
|
|
return option.groupId === group.id
|
|
} else {
|
|
return option.groupId === group.id && !option.selected;
|
|
}
|
|
});
|
|
|
|
if(groupOptions.length >= 1) {
|
|
const dropdownGroup = this._getTemplate('optgroup', group);
|
|
|
|
groupFragment.appendChild(dropdownGroup);
|
|
|
|
this.renderOptions(groupOptions, groupFragment);
|
|
}
|
|
});
|
|
|
|
return groupFragment;
|
|
}
|
|
|
|
/**
|
|
* Render options into a DOM fragment and append to options list
|
|
* @param {Array} options Options to add to list
|
|
* @param {DocumentFragment} fragment Fragment to add options to (optional)
|
|
* @return {DocumentFragment} Populated options fragment
|
|
* @private
|
|
*/
|
|
renderOptions(options, fragment) {
|
|
// Create a fragment to store our list items (so we don't have to update the DOM for each item)
|
|
const optsFragment = fragment || document.createDocumentFragment();
|
|
|
|
options.forEach((option, i) => {
|
|
const dropdownItem = this._getTemplate('option', option);
|
|
|
|
if(this.passedElement.type === 'select-one') {
|
|
optsFragment.appendChild(dropdownItem);
|
|
} else if(!option.selected) {
|
|
optsFragment.appendChild(dropdownItem);
|
|
}
|
|
});
|
|
|
|
return optsFragment;
|
|
}
|
|
|
|
/**
|
|
* Render items into a DOM fragment and append to items list
|
|
* @param {Array} items Items to add to list
|
|
* @param {DocumentFragment} fragment Fragrment to add items to (optional)
|
|
* @return
|
|
* @private
|
|
*/
|
|
renderItems(items, fragment) {
|
|
// Create fragment to add elements to
|
|
const itemListFragment = fragment || document.createDocumentFragment();
|
|
// Simplify store data to just values
|
|
const itemsFiltered = this.store.getItemsReducedToValues(items);
|
|
|
|
if(this.passedElement.type === 'text') {
|
|
// Assign hidden input array of values
|
|
this.passedElement.setAttribute('value', itemsFiltered.join(this.options.delimiter));
|
|
} else {
|
|
const selectedOptionsFragment = document.createDocumentFragment();
|
|
|
|
// Add each list item to list
|
|
items.forEach((item) => {
|
|
// Create a standard select option
|
|
const option = this._getTemplate('selectOption', item);
|
|
|
|
// Append it to fragment
|
|
selectedOptionsFragment.appendChild(option);
|
|
});
|
|
|
|
// Update selected options
|
|
this.passedElement.innerHTML = "";
|
|
this.passedElement.appendChild(selectedOptionsFragment);
|
|
}
|
|
|
|
// Add each list item to list
|
|
items.forEach((item) => {
|
|
// Create new list element
|
|
const listItem = this._getTemplate('item', item);
|
|
|
|
// Append it to list
|
|
itemListFragment.appendChild(listItem);
|
|
});
|
|
|
|
return itemListFragment;
|
|
}
|
|
|
|
/**
|
|
* Render DOM with values
|
|
* @return
|
|
* @private
|
|
*/
|
|
render() {
|
|
this.currentState = this.store.getState();
|
|
|
|
// Only render if our state has actually changed
|
|
if(this.currentState !== this.prevState) {
|
|
|
|
// Options
|
|
if((this.currentState.options !== this.prevState.options || this.currentState.groups !== this.prevState.groups)) {
|
|
if(this.passedElement.type === 'select-multiple' || this.passedElement.type === 'select-one') {
|
|
// Get active groups/options
|
|
const activeGroups = this.store.getGroupsFilteredByActive();
|
|
const activeChoices = this.store.getChoicesFilteredByActive();
|
|
|
|
let choiceListFragment = document.createDocumentFragment();
|
|
|
|
// Clear options
|
|
this.choiceList.innerHTML = '';
|
|
|
|
// If we have grouped options
|
|
if(activeGroups.length >= 1 && this.isSearching !== true) {
|
|
choiceListFragment = this.renderGroups(activeGroups, activeChoices, choiceListFragment);
|
|
} else if(activeChoices.length >= 1) {
|
|
choiceListFragment = this.renderOptions(activeChoices, choiceListFragment);
|
|
}
|
|
|
|
if(choiceListFragment.children.length) {
|
|
// If we actually have anything to add to our dropdown
|
|
// append it and highlight the first option
|
|
this.choiceList.appendChild(choiceListFragment);
|
|
this._highlightChoice();
|
|
} else {
|
|
// Otherwise show a notice
|
|
const dropdownItem = this.isSearching ? this._getTemplate('notice', 'No results found') : this._getTemplate('notice', 'No choices to choose from');
|
|
this.choiceList.appendChild(dropdownItem);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Items
|
|
if(this.currentState.items !== this.prevState.items) {
|
|
const activeItems = this.store.getItemsFilteredByActive();
|
|
if(activeItems) {
|
|
// Create a fragment to store our list items (so we don't have to update the DOM for each item)
|
|
const itemListFragment = this.renderItems(activeItems);
|
|
|
|
// Clear list
|
|
this.itemList.innerHTML = '';
|
|
|
|
// If we have items to add
|
|
if(itemListFragment.children.length) {
|
|
// Update list
|
|
this.itemList.appendChild(itemListFragment);
|
|
}
|
|
}
|
|
}
|
|
|
|
this.prevState = this.currentState;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Trigger event listeners
|
|
* @return
|
|
* @private
|
|
*/
|
|
_addEventListeners() {
|
|
document.addEventListener('keyup', this._onKeyUp);
|
|
document.addEventListener('keydown', this._onKeyDown);
|
|
document.addEventListener('mousedown', this._onMouseDown);
|
|
document.addEventListener('mouseover', this._onMouseOver);
|
|
|
|
this.input.addEventListener('input', this._onInput);
|
|
this.input.addEventListener('paste', this._onPaste);
|
|
this.input.addEventListener('focus', this._onFocus);
|
|
this.input.addEventListener('blur', this._onBlur);
|
|
}
|
|
|
|
/**
|
|
* Destroy event listeners
|
|
* @return
|
|
* @private
|
|
*/
|
|
_removeEventListeners() {
|
|
document.removeEventListener('keyup', this._onKeyUp);
|
|
document.removeEventListener('keydown', this._onKeyDown);
|
|
document.removeEventListener('mousedown', this._onMouseDown);
|
|
document.removeEventListener('mouseover', this._onMouseOver);
|
|
|
|
this.input.removeEventListener('input', this._onInput);
|
|
this.input.removeEventListener('paste', this._onPaste);
|
|
this.input.removeEventListener('focus', this._onFocus);
|
|
this.input.removeEventListener('blur', this._onBlur);
|
|
}
|
|
};
|
|
|
|
window.Choices = module.exports = Choices; |