/*
 *	jquery.suggest 1.1 - 2007-08-06
 *	
 *	Uses code and techniques from following libraries:
 *	1. http://www.dyve.net/jquery/?autocomplete
 *	2. http://dev.jquery.com/browser/trunk/plugins/interface/iautocompleter.js	
 *
 *	All the new stuff written by Peter Vulgaris (www.vulgarisoip.com)	
 *	Feel free to do whatever you want with this file
 *
 */

(function($) {

        $.suggest = function(input, options) {

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

                var timeout = false;		// hold timeout ID for suggestion results to appear	
                var prevLength = 0;			// last recorded length of $input.val()
                var cache = [];				// cache MRU list
                var cacheSize = 0;			// size of cache in chars (bytes?)
                
                $results.addClass(options.resultsClass).appendTo('body');
                        

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

                $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
                
                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();
												//bl4z
												doSearch();
												$results.hide();
                                                break;
                                                
                                        case 27: //	escape
                                                $results.hide();
                                                break;

                                }
                                
                        } else if ($input.val().length != prevLength) {
							if (timeout) 
                                        clearTimeout(timeout);
                                timeout = setTimeout(suggest, options.delay);
                                prevLength = $input.val().length;

                        }
					
					//bl4z
					if (e.keyCode == 13) {
						doSearch();
                        $results.hide();
					}
                }
                
                
                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] + '</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();
                                });
                                                
                }
                
                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 token = $.trim(tokens[i]);
                                if (token) {
                                        token = token.replace(
                                                new RegExp(q, 'ig'), 
                                                function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }
                                                );
                                        items[items.length] = token;
                                }
                        }
                        
                        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) {
                                $input.val($currentResult.text());
                                $results.hide();
                                
                                if (options.onSelect)
                                        options.onSelect.apply($input[0]);
                                        
                        }
                
                }
                
                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 || 100;
                options.resultsClass = options.resultsClass || 'ac_results';
                options.selectClass = options.selectClass || 'ac_over';
                options.matchClass = options.matchClass || 'ac_match';
                options.minchars = options.minchars || 2;
                options.delimiter = options.delimiter || '\n';
                options.onSelect = options.onSelect || false;
                options.maxCacheSize = options.maxCacheSize || 65536;

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

                return this;
                
        };
        
})(jQuery);