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auto-complete.js
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/*
JavaScript autoComplete v1.0.4
Copyright (c) 2014 Simon Steinberger / Pixabay
GitHub: https://github.com/Pixabay/JavaScript-autoComplete
License: http://www.opensource.org/licenses/mit-license.php
*/
var autoComplete = (function(){
// "use strict";
function autoComplete(options){
if (!document.querySelector) return;
// helpers
function hasClass(el, className){ return el.classList ? el.classList.contains(className) : new RegExp('\\b'+ className+'\\b').test(el.className); }
function addEvent(el, type, handler){
if (el.attachEvent) el.attachEvent('on'+type, handler); else el.addEventListener(type, handler);
}
function removeEvent(el, type, handler){
// if (el.removeEventListener) not working in IE11
if (el.detachEvent) el.detachEvent('on'+type, handler); else el.removeEventListener(type, handler);
}
function live(elClass, event, cb, context){
addEvent(context || document, event, function(e){
var found, el = e.target || e.srcElement;
while (el && !(found = hasClass(el, elClass))) el = el.parentElement;
if (found) cb.call(el, e);
});
}
var o = {
selector: 0,
source: 0,
minChars: 3,
delay: 150,
offsetLeft: 0,
offsetTop: 1,
cache: 1,
menuClass: '',
renderItem: function (item, search){
// escape special characters
search = search.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
var re = new RegExp("(" + search.split(' ').join('|') + ")", "gi");
return '<div class="autocomplete-suggestion" data-val="' + item + '">' + item.replace(re, "<b>$1</b>") + '</div>';
},
onSelect: function(e, term, item){}
};
for (var k in options) { if (options.hasOwnProperty(k)) o[k] = options[k]; }
// init
var elems = typeof o.selector == 'object' ? [o.selector] : document.querySelectorAll(o.selector);
for (var i=0; i<elems.length; i++) {
var that = elems[i];
// create suggestions container "sc"
that.sc = document.createElement('div');
that.sc.className = 'autocomplete-suggestions '+o.menuClass;
that.autocompleteAttr = that.getAttribute('autocomplete');
that.setAttribute('autocomplete', 'off');
that.cache = {};
that.last_val = '';
that.updateSC = function(resize, next){
var rect = that.getBoundingClientRect();
that.sc.style.left = Math.round(rect.left + (window.pageXOffset || document.documentElement.scrollLeft) + o.offsetLeft) + 'px';
that.sc.style.top = Math.round(rect.bottom + (window.pageYOffset || document.documentElement.scrollTop) + o.offsetTop) + 'px';
that.sc.style.width = Math.round(rect.right - rect.left) + 'px'; // outerWidth
if (!resize) {
that.sc.style.display = 'block';
if (!that.sc.maxHeight) { that.sc.maxHeight = parseInt((window.getComputedStyle ? getComputedStyle(that.sc, null) : that.sc.currentStyle).maxHeight); }
if (!that.sc.suggestionHeight) that.sc.suggestionHeight = that.sc.querySelector('.autocomplete-suggestion').offsetHeight;
if (that.sc.suggestionHeight)
if (!next) that.sc.scrollTop = 0;
else {
var scrTop = that.sc.scrollTop, selTop = next.getBoundingClientRect().top - that.sc.getBoundingClientRect().top;
if (selTop + that.sc.suggestionHeight - that.sc.maxHeight > 0)
that.sc.scrollTop = selTop + that.sc.suggestionHeight + scrTop - that.sc.maxHeight;
else if (selTop < 0)
that.sc.scrollTop = selTop + scrTop;
}
}
}
addEvent(window, 'resize', that.updateSC);
document.body.appendChild(that.sc);
live('autocomplete-suggestion', 'mouseleave', function(e){
var sel = that.sc.querySelector('.autocomplete-suggestion.selected');
if (sel) setTimeout(function(){ sel.className = sel.className.replace('selected', ''); }, 20);
}, that.sc);
live('autocomplete-suggestion', 'mouseover', function(e){
var sel = that.sc.querySelector('.autocomplete-suggestion.selected');
if (sel) sel.className = sel.className.replace('selected', '');
this.className += ' selected';
}, that.sc);
live('autocomplete-suggestion', 'mousedown', function(e){
if (hasClass(this, 'autocomplete-suggestion')) { // else outside click
var v = this.getAttribute('data-val');
that.value = v;
o.onSelect(e, v, this);
that.sc.style.display = 'none';
}
}, that.sc);
that.blurHandler = function(){
try { var over_sb = document.querySelector('.autocomplete-suggestions:hover'); } catch(e){ var over_sb = 0; }
if (!over_sb) {
that.last_val = that.value;
that.sc.style.display = 'none';
setTimeout(function(){ that.sc.style.display = 'none'; }, 350); // hide suggestions on fast input
} else if (that !== document.activeElement) setTimeout(function(){ that.focus(); }, 20);
};
addEvent(that, 'blur', that.blurHandler);
var suggest = function(data){
var val = that.value;
that.cache[val] = data;
if (data.length && val.length >= o.minChars) {
var s = '';
for (var i=0;i<data.length;i++) s += o.renderItem(data[i], val);
that.sc.innerHTML = s;
that.updateSC(0);
}
else
that.sc.style.display = 'none';
}
that.keydownHandler = function(e){
var key = window.event ? e.keyCode : e.which;
// down (40), up (38)
if ((key == 40 || key == 38) && that.sc.innerHTML) {
var next, sel = that.sc.querySelector('.autocomplete-suggestion.selected');
if (!sel) {
next = (key == 40) ? that.sc.querySelector('.autocomplete-suggestion') : that.sc.childNodes[that.sc.childNodes.length - 1]; // first : last
next.className += ' selected';
that.value = next.getAttribute('data-val');
} else {
next = (key == 40) ? sel.nextSibling : sel.previousSibling;
if (next) {
sel.className = sel.className.replace('selected', '');
next.className += ' selected';
that.value = next.getAttribute('data-val');
}
else { sel.className = sel.className.replace('selected', ''); that.value = that.last_val; next = 0; }
}
that.updateSC(0, next);
return false;
}
// esc
else if (key == 27) { that.value = that.last_val; that.sc.style.display = 'none'; }
// enter
else if (key == 13 || key == 9) {
var sel = that.sc.querySelector('.autocomplete-suggestion.selected');
if (sel && that.sc.style.display != 'none') { o.onSelect(e, sel.getAttribute('data-val'), sel); setTimeout(function(){ that.sc.style.display = 'none'; }, 20); }
}
};
addEvent(that, 'keydown', that.keydownHandler);
that.keyupHandler = function(e){
var key = window.event ? e.keyCode : e.which;
if (!key || (key < 35 || key > 40) && key != 13 && key != 27) {
var val = that.value;
if (val.length >= o.minChars) {
if (val != that.last_val) {
that.last_val = val;
clearTimeout(that.timer);
if (o.cache) {
if (val in that.cache) { suggest(that.cache[val]); return; }
// no requests if previous suggestions were empty
for (var i=1; i<val.length-o.minChars; i++) {
var part = val.slice(0, val.length-i);
if (part in that.cache && !that.cache[part].length) { suggest([]); return; }
}
}
that.timer = setTimeout(function(){ o.source(val, suggest) }, o.delay);
}
} else {
that.last_val = val;
that.sc.style.display = 'none';
}
}
};
addEvent(that, 'keyup', that.keyupHandler);
that.focusHandler = function(e){
that.last_val = '\n';
that.keyupHandler(e)
};
if (!o.minChars) addEvent(that, 'focus', that.focusHandler);
}
// public destroy method
this.destroy = function(){
for (var i=0; i<elems.length; i++) {
var that = elems[i];
removeEvent(window, 'resize', that.updateSC);
removeEvent(that, 'blur', that.blurHandler);
removeEvent(that, 'focus', that.focusHandler);
removeEvent(that, 'keydown', that.keydownHandler);
removeEvent(that, 'keyup', that.keyupHandler);
if (that.autocompleteAttr)
that.setAttribute('autocomplete', that.autocompleteAttr);
else
that.removeAttribute('autocomplete');
document.body.removeChild(that.sc);
that = null;
}
};
}
return autoComplete;
})();
(function(){
if (typeof define === 'function' && define.amd)
define('autoComplete', function () { return autoComplete; });
else if (typeof module !== 'undefined' && module.exports)
module.exports = autoComplete;
else
window.autoComplete = autoComplete;
})();