/*

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* jquery.suggest 1.1b - 2007-08-06

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* Patched by Mark Jaquith with Alexander Dick's "multiple items" patch to allow for auto-suggesting of more than one tag before submitting

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* See: http://www.vulgarisoip.com/2007/06/29/jquerysuggest-an-alternative-jquery-based-autocomplete-library/#comment-7228

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*

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* Uses code and techniques from following libraries:

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* 1. http://www.dyve.net/jquery/?autocomplete

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* 2. http://dev.jquery.com/browser/trunk/plugins/interface/iautocompleter.js

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*

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* All the new stuff written by Peter Vulgaris (www.vulgarisoip.com)

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* Feel free to do whatever you want with this file

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*

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*/

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(function($) {

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$.suggest = function(input, options) {

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var $input, $results, timeout, prevLength, cache, cacheSize;

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$input = $(input).attr("autocomplete", "off");

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$results = $("<ul/>");

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timeout = false; // hold timeout ID for suggestion results to appear

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prevLength = 0; // last recorded length of $input.val()

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cache = []; // cache MRU list

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cacheSize = 0; // size of cache in chars (bytes?)

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$results.addClass(options.resultsClass).appendTo('body');

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resetPosition();

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$(window)

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.on( 'load', resetPosition ) // just in case user is changing size of page while loading

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.on( 'resize', resetPosition );

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$input.blur(function() {

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setTimeout(function() { $results.hide() }, 200);

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});

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$input.keydown(processKey);

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function resetPosition() {

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// requires jquery.dimension plugin

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var offset = $input.offset();

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$results.css({

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top: (offset.top + input.offsetHeight) + 'px',

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left: offset.left + 'px'

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});

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}

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function processKey(e) {

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// handling up/down/escape requires results to be visible

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// handling enter/tab requires that AND a result to be selected

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if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) ||

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(/^13$|^9$/.test(e.keyCode) && getCurrentResult())) {

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if (e.preventDefault)

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e.preventDefault();

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if (e.stopPropagation)

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e.stopPropagation();

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e.cancelBubble = true;

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e.returnValue = false;

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switch(e.keyCode) {

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case 38: // up

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prevResult();

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break;

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case 40: // down

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nextResult();

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break;

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case 9: // tab

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case 13: // return

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selectCurrentResult();

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break;

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case 27: // escape

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$results.hide();

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break;

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}

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} else if ($input.val().length != prevLength) {

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if (timeout)

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clearTimeout(timeout);

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timeout = setTimeout(suggest, options.delay);

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prevLength = $input.val().length;

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}

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}

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function suggest() {

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var q = $.trim($input.val()), multipleSepPos, items;

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if ( options.multiple ) {

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multipleSepPos = q.lastIndexOf(options.multipleSep);

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if ( multipleSepPos != -1 ) {

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q = $.trim(q.substr(multipleSepPos + options.multipleSep.length));

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}

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}

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if (q.length >= options.minchars) {

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cached = checkCache(q);

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if (cached) {

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displayItems(cached['items']);

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} else {

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$.get(options.source, {q: q}, function(txt) {

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$results.hide();

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items = parseTxt(txt, q);

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displayItems(items);

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addToCache(q, items, txt.length);

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});

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}

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} else {

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$results.hide();

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}

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}

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function checkCache(q) {

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var i;

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for (i = 0; i < cache.length; i++)

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if (cache[i]['q'] == q) {

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cache.unshift(cache.splice(i, 1)[0]);

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return cache[0];

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}

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return false;

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}

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function addToCache(q, items, size) {

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var cached;

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while (cache.length && (cacheSize + size > options.maxCacheSize)) {

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cached = cache.pop();

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cacheSize -= cached['size'];

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}

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cache.push({

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q: q,

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size: size,

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items: items

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});

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cacheSize += size;

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}

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function displayItems(items) {

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var html = '', i;

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if (!items)

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return;

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if (!items.length) {

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$results.hide();

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return;

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}

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resetPosition(); // when the form moves after the page has loaded

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for (i = 0; i < items.length; i++)

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html += '<li>' + items[i] + '</li>';

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$results.html(html).show();

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$results

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.children('li')

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.mouseover(function() {

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$results.children('li').removeClass(options.selectClass);

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$(this).addClass(options.selectClass);

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})

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.click(function(e) {

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e.preventDefault();

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e.stopPropagation();

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selectCurrentResult();

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});

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}

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function parseTxt(txt, q) {

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var items = [], tokens = txt.split(options.delimiter), i, token;

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// parse returned data for non-empty items

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for (i = 0; i < tokens.length; i++) {

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token = $.trim(tokens[i]);

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if (token) {

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token = token.replace(

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new RegExp(q, 'ig'),

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function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }

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);

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items[items.length] = token;

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}

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}

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return items;

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}

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function getCurrentResult() {

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var $currentResult;

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if (!$results.is(':visible'))

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return false;

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$currentResult = $results.children('li.' + options.selectClass);

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if (!$currentResult.length)

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$currentResult = false;

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return $currentResult;

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}

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function selectCurrentResult() {

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$currentResult = getCurrentResult();

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if ($currentResult) {

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if ( options.multiple ) {

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if ( $input.val().indexOf(options.multipleSep) != -1 ) {

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$currentVal = $input.val().substr( 0, ( $input.val().lastIndexOf(options.multipleSep) + options.multipleSep.length ) ) + ' ';

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} else {

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$currentVal = "";

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}

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$input.val( $currentVal + $currentResult.text() + options.multipleSep + ' ' );

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$input.focus();

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} else {

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$input.val($currentResult.text());

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}

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$results.hide();

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$input.trigger('change');

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if (options.onSelect)

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options.onSelect.apply($input[0]);

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}

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}

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function nextResult() {

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$currentResult = getCurrentResult();

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if ($currentResult)

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$currentResult

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.removeClass(options.selectClass)

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.next()

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.addClass(options.selectClass);

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else

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$results.children('li:first-child').addClass(options.selectClass);

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}

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function prevResult() {

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var $currentResult = getCurrentResult();

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if ($currentResult)

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$currentResult

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.removeClass(options.selectClass)

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.prev()

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.addClass(options.selectClass);

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else

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$results.children('li:last-child').addClass(options.selectClass);

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}

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}

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$.fn.suggest = function(source, options) {

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if (!source)

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return;

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options = options || {};

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options.multiple = options.multiple || false;

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options.multipleSep = options.multipleSep || ",";

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options.source = source;

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options.delay = options.delay || 100;

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options.resultsClass = options.resultsClass || 'ac_results';

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options.selectClass = options.selectClass || 'ac_over';

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options.matchClass = options.matchClass || 'ac_match';

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options.minchars = options.minchars || 2;

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options.delimiter = options.delimiter || '\n';

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options.onSelect = options.onSelect || false;

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options.maxCacheSize = options.maxCacheSize || 65536;

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this.each(function() {

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new $.suggest(this, options);

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});

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return this;

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};

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})(jQuery);

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