/*
	 *	jquery.suggest 1.2 - 2007-08-21
	 *
	 *  Original Script by Peter Vulgaris (www.vulgarisoip.com)
	 *  Updates by Chris Schuld (http://chrisschuld.com/)
	 *
	 */

	(function($) {

		$.suggest = function(input, options) {

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

			var timeout = false;		// hold timeout ID for suggestion results to appear
			var prevLength = 0;			// last recorded length of $input.val()
			if(options.combobox){
			    prevLength = -1;
			}

			var cache = [];				// cache MRU list
			var cacheSize = 0;			// size of cache in chars (bytes?)

			if( ! options.attachObject ){
				options.attachObject = $(document.createElement("ul")).appendTo('body');
			}

			$results = $(options.attachObject);
			$results.addClass(options.resultsClass);

			resetPosition();
			$(window)
				.load(resetPosition)		// just in case user is changing size of page while loading
				.resize(resetPosition);

			$input.focus(resetPosition); // フォーカスが当たった時に位置を調整
			
			$input.blur(function() {
				setTimeout(function() { $results.hide() }, 200);
			});

			// help IE users if possible
			/*
			try {
			    $results.bgiframe();
			} catch(e) {
			}*/


			// I really hate browser detection, but I don't see any other way
			if ($.browser.mozilla)
				$input.keypress(processKey);	// onkeypress repeats arrow keys in Mozilla/Opera
			else
				$input.keydown(processKey);		// onkeydown repeats arrow keys in IE/Safari

			if(options.combobox){
			    $input.focus(processKey);	// onkeypress repeats arrow keys in Mozilla/Opera
			}

			function resetPosition() {
				// requires jquery.dimension plugin
				var offset = $input.offset();
				$results.css({
					top: (offset.top + input.offsetHeight) + 'px',
					left: offset.left + 'px'
				});
			}


			function processKey(e) {

				// handling up/down/escape requires results to be visible
				// handling enter/tab requires that AND a result to be selected
				if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) ||
					(/^13$|^9$/.test(e.keyCode) && getCurrentResult())) {

		            if (e.preventDefault)
		                e.preventDefault();
					if (e.stopPropagation)
		                e.stopPropagation();

	                e.cancelBubble = true;
	                e.returnValue = false;

					switch(e.keyCode) {

						case 38: // up
							prevResult();
							break;

						case 40: // down
							nextResult();
							break;

						case 9:  // tab
						case 13: // return
							selectCurrentResult();
							break;

						case 27: //	escape
							$results.hide();
							break;

					}

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

					if (timeout)
						clearTimeout(timeout);
					timeout = setTimeout(suggest, options.delay);

					if(!options.combobox){
					    //prevLength = $input.val().length;
					    prevLength = $input.val();
					}
				}
			}


			function suggest() {
				var q = $.trim($input.val());

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

					cached = checkCache(q);

					if (cached) {

						displayItems(cached['items']);

					} else {

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

							$results.hide();

							var items = parseTxt(txt, q);

							displayItems(items);
							addToCache(q, items, txt.length);

						});

					}

				} else {

					$results.hide();

				}

			}


			function checkCache(q) {

				for (var i = 0; i < cache.length; i++)
					if (cache[i]['q'] == q) {
						cache.unshift(cache.splice(i, 1)[0]);
						return cache[0];
					}

				return false;

			}

			function addToCache(q, items, size) {

				while (cache.length && (cacheSize + size > options.maxCacheSize)) {
					var cached = cache.pop();
					cacheSize -= cached['size'];
				}

				cache.push({
					q: q,
					size: size,
					items: items
					});

				cacheSize += size;

			}

			function displayItems(items) {

				if (!items)
					return;

				if (!items.length) {
					$results.hide();
					return;
				}

				var html = '';
				for (var i = 0; i < items.length; i++)
					html += '<li' + (items[i]['key'] != '' ? ' id="s_'+ items[i]['key']+'"' : '' ) + '>' + items[i]['value'] + '</li>';


				$results.html(html).show();
				$results
					.children('li')
					.mouseover(function() {
						$results.children('li').removeClass(options.selectClass);
						$(this).addClass(options.selectClass);
					})
					.click(function(e) {
						e.preventDefault();
						e.stopPropagation();
						selectCurrentResult();
					});
	                        $results.bgiframe();
			}

			function parseTxt(txt, q) {

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

				// parse returned data for non-empty items
				for (var i = 0; i < tokens.length; i++) {
					var data = $.trim(tokens[i]).split(options.dataDelimiter);
					if( data.length > 1 ) {
						token = data[0];
						key = data[1];
					}
					else {
						token = data[0]
						key = '';
					}

					if (token) {
						token = token.replace(
							new RegExp(q, 'ig'),
							function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }
							);
						items[items.length] = {'value':token,'key':key};
					}
				}

				return items;
			}

			function getCurrentResult() {

				if (!$results.is(':visible'))
					return false;

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

				if (!$currentResult.length)
					$currentResult = false;

				return $currentResult;

			}

			function selectCurrentResult() {

				$currentResult = getCurrentResult();

				if ($currentResult) {
				        var old_value = $input.val();
					$input.val($currentResult.text());
					$results.hide();

					if( $(options.dataContainer) ) {
						$(options.dataContainer).val($currentResult.attr('id').replace('s_',''));
					}

					if (options.onSelect) {
						//options.onSelect.apply($input[0]);
						options.onSelect.apply(this, [$currentResult.text(), $currentResult.attr('id').replace('s_',''), old_value]);
					}
				}

			}

			function nextResult() {

				$currentResult = getCurrentResult();

				if ($currentResult)
					$currentResult
						.removeClass(options.selectClass)
						.next()
							.addClass(options.selectClass);
				else
					$results.children('li:first-child').addClass(options.selectClass);

			}

			function prevResult() {

				$currentResult = getCurrentResult();

				if ($currentResult)
					$currentResult
						.removeClass(options.selectClass)
						.prev()
							.addClass(options.selectClass);
				else
					$results.children('li:last-child').addClass(options.selectClass);

			}

		}

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

			if (!source)
				return;

			options = options || {};
			options.source = source;
			options.delay = options.delay || 150;
			options.resultsClass = options.resultsClass || 'ac_results';
			options.selectClass = options.selectClass || 'ac_over';
			options.matchClass = options.matchClass || 'ac_match';
			options.minchars = options.minchars || 1;
			options.delimiter = options.delimiter || '\n';
			options.onSelect = options.onSelect || false;
			options.maxCacheSize = options.maxCacheSize || 65536;
			options.dataDelimiter = options.dataDelimiter || '\t';
			options.dataContainer = options.dataContainer || '#SuggestResult';
			options.attachObject = options.attachObject || null;
			options.combobox = options.combobox || false;

			this.each(function() {
				new $.suggest(this, options);
			});

			return this;

		};

	})(jQuery);