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- /**
- * Simple, lightweight, usable local autocomplete library for modern browsers
- * Because there weren’t enough autocomplete scripts in the world? Because I’m completely insane and have NIH syndrome? Probably both. :P
- * @author Lea Verou http://leaverou.github.io/awesomplete
- * MIT license
- */
- (function () {
- var _ = function (input, o) {
- var me = this;
- // Setup
- this.input = $(input);
- this.input.setAttribute("aria-autocomplete", "list");
- o = o || {};
- configure.call(this, {
- minChars: 2,
- maxItems: 10,
- autoFirst: false,
- filter: _.FILTER_CONTAINS,
- sort: _.SORT_BYLENGTH,
- item: function (text, input) {
- return $.create("li", {
- innerHTML: text.replace(RegExp($.regExpEscape(input.trim()), "gi"), "<mark>$&</mark>"),
- "aria-selected": "false"
- });
- },
- replace: function (text) {
- this.input.value = text;
- }
- }, o);
- this.index = -1;
- // Create necessary elements
- this.container = $.create("div", {
- className: "awesomplete",
- around: input
- });
- this.ul = $.create("ul", {
- hidden: "",
- inside: this.container
- });
- this.status = $.create("span", {
- className: "visually-hidden",
- role: "status",
- "aria-live": "assertive",
- "aria-relevant": "additions",
- inside: this.container
- });
- // Bind events
- $.bind(this.input, {
- "input": this.evaluate.bind(this),
- "blur": this.close.bind(this),
- "keydown": function(evt) {
- var c = evt.keyCode;
- // If the dropdown `ul` is in view, then act on keydown for the following keys:
- // Enter / Esc / Up / Down
- if(me.opened) {
- if (c === 13 && me.selected) { // Enter
- evt.preventDefault();
- me.select();
- }
- else if (c === 27) { // Esc
- me.close();
- }
- else if (c === 38 || c === 40) { // Down/Up arrow
- evt.preventDefault();
- me[c === 38? "previous" : "next"]();
- }
- }
- }
- });
- $.bind(this.input.form, {"submit": this.close.bind(this)});
- $.bind(this.ul, {"mousedown": function(evt) {
- var li = evt.target;
- if (li !== this) {
- while (li && !/li/i.test(li.nodeName)) {
- li = li.parentNode;
- }
- if (li) {
- me.select(li);
- }
- }
- }});
- if (this.input.hasAttribute("list")) {
- this.list = "#" + input.getAttribute("list");
- input.removeAttribute("list");
- }
- else {
- this.list = this.input.getAttribute("data-list") || o.list || [];
- }
- _.all.push(this);
- };
- _.prototype = {
- set list(list) {
- if (Array.isArray(list)) {
- this._list = list;
- }
- else if (typeof list === "string" && list.indexOf(",") > -1) {
- this._list = list.split(/\s*,\s*/);
- }
- else { // Element or CSS selector
- list = $(list);
- if (list && list.children) {
- this._list = slice.apply(list.children).map(function (el) {
- return el.innerHTML.trim();
- });
- }
- }
- if (document.activeElement === this.input) {
- this.evaluate();
- }
- },
- get selected() {
- return this.index > -1;
- },
- get opened() {
- return this.ul && this.ul.getAttribute("hidden") == null;
- },
- close: function () {
- this.ul.setAttribute("hidden", "");
- this.index = -1;
- $.fire(this.input, "awesomplete-close");
- },
- open: function () {
- this.ul.removeAttribute("hidden");
- if (this.autoFirst && this.index === -1) {
- this.goto(0);
- }
- $.fire(this.input, "awesomplete-open");
- },
- next: function () {
- var count = this.ul.children.length;
- this.goto(this.index < count - 1? this.index + 1 : -1);
- },
- previous: function () {
- var count = this.ul.children.length;
- this.goto(this.selected? this.index - 1 : count - 1);
- },
- // Should not be used, highlights specific item without any checks!
- goto: function (i) {
- var lis = this.ul.children;
- if (this.selected) {
- lis[this.index].setAttribute("aria-selected", "false");
- }
- this.index = i;
- if (i > -1 && lis.length > 0) {
- lis[i].setAttribute("aria-selected", "true");
- this.status.textContent = lis[i].textContent;
- }
- $.fire(this.input, "awesomplete-highlight");
- },
- select: function (selected) {
- selected = selected || this.ul.children[this.index];
- if (selected) {
- var prevented;
- $.fire(this.input, "awesomplete-select", {
- text: selected.textContent,
- preventDefault: function () {
- prevented = true;
- }
- });
- if (!prevented) {
- this.replace(selected.textContent);
- this.close();
- $.fire(this.input, "awesomplete-selectcomplete");
- }
- }
- },
- evaluate: function() {
- var me = this;
- var value = this.input.value;
- if (value.length >= this.minChars && this._list.length > 0) {
- this.index = -1;
- // Populate list with options that match
- this.ul.innerHTML = "";
- this._list
- .filter(function(item) {
- return me.filter(item, value);
- })
- .sort(this.sort)
- .every(function(text, i) {
- me.ul.appendChild(me.item(text, value));
- return i < me.maxItems - 1;
- });
- if (this.ul.children.length === 0) {
- this.close();
- } else {
- this.open();
- }
- }
- else {
- this.close();
- }
- }
- };
- // Static methods/properties
- _.all = [];
- _.FILTER_CONTAINS = function (text, input) {
- return RegExp($.regExpEscape(input.trim()), "i").test(text);
- };
- _.FILTER_STARTSWITH = function (text, input) {
- return RegExp("^" + $.regExpEscape(input.trim()), "i").test(text);
- };
- _.SORT_BYLENGTH = function (a, b) {
- if (a.length !== b.length) {
- return a.length - b.length;
- }
- return a < b? -1 : 1;
- };
- // Private functions
- function configure(properties, o) {
- for (var i in properties) {
- var initial = properties[i],
- attrValue = this.input.getAttribute("data-" + i.toLowerCase());
- if (typeof initial === "number") {
- this[i] = +attrValue;
- }
- else if (initial === false) { // Boolean options must be false by default anyway
- this[i] = attrValue !== null;
- }
- else if (initial instanceof Function) {
- this[i] = null;
- }
- else {
- this[i] = attrValue;
- }
- this[i] = this[i] || o[i] || initial;
- }
- }
- // Helpers
- var slice = Array.prototype.slice;
- function $(expr, con) {
- return typeof expr === "string"? (con || document).querySelector(expr) : expr || null;
- }
- function $$(expr, con) {
- return slice.call((con || document).querySelectorAll(expr));
- }
- $.create = function(tag, o) {
- var element = document.createElement(tag);
- for (var i in o) {
- var val = o[i];
- if (i === "inside") {
- $(val).appendChild(element);
- }
- else if (i === "around") {
- var ref = $(val);
- ref.parentNode.insertBefore(element, ref);
- element.appendChild(ref);
- }
- else if (i in element) {
- element[i] = val;
- }
- else {
- element.setAttribute(i, val);
- }
- }
- return element;
- };
- $.bind = function(element, o) {
- if (element) {
- for (var event in o) {
- var callback = o[event];
- event.split(/\s+/).forEach(function (event) {
- element.addEventListener(event, callback);
- });
- }
- }
- };
- $.fire = function(target, type, properties) {
- var evt = document.createEvent("HTMLEvents");
- evt.initEvent(type, true, true );
- for (var j in properties) {
- evt[j] = properties[j];
- }
- target.dispatchEvent(evt);
- };
- $.regExpEscape = function (s) {
- return s.replace(/[-\\^$*+?.()|[\]{}]/g, "\\$&");
- }
- // Initialization
- function init() {
- $$("input.awesomplete").forEach(function (input) {
- new Awesomplete(input);
- });
- }
- // Are we in a browser? Check for Document constructor
- if (typeof Document !== 'undefined') {
- // DOM already loaded?
- if (document.readyState !== "loading") {
- init();
- }
- else {
- // Wait for it
- document.addEventListener("DOMContentLoaded", init);
- }
- }
- _.$ = $;
- _.$$ = $$;
- // Make sure to export Awesomplete on self when in a browser
- if (typeof self !== 'undefined') {
- self.Awesomplete = _;
- }
- // Expose Awesomplete as a CJS module
- if (typeof exports === 'object') {
- module.exports = _;
- }
- return _;
- }());
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