330 lines
7.1 KiB
JavaScript
330 lines
7.1 KiB
JavaScript
/*
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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 = $(document.createElement("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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$(window)
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.load(resetPosition) // just in case user is changing size of page while loading
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.resize(resetPosition);
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$input.blur(function() {
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setTimeout(function() { $results.hide() }, 200);
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});
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// help IE users if possible
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if ( $.browser.msie ) {
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try {
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$results.bgiframe();
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} catch(e) { }
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}
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// I really hate browser detection, but I don't see any other way
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if ($.browser.mozilla)
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$input.keypress(processKey); // onkeypress repeats arrow keys in Mozilla/Opera
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else
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$input.keydown(processKey); // onkeydown repeats arrow keys in IE/Safari
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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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$results.hide();
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if (options.onSelect)
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options.onSelect.apply($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); |