// ==UserScript==
// @name                Tiger
// @description         
// @created date        2009/11/16  9:33
// @created author      Tiger(tigershi0507@gmail.com)
// @version             1.0.2
// @version owner       Copyright (C) 2009-2010 keerr.com All rights reserved.
// ==/UserScript==

/*************************************************
verified time 	:	2009/9/19   9:23
verified author	:	Tiger
verified purpose:	?????ac?????????ж????
**************************************************/
/*************************************************
verified time 	:	2009/9/19   10:22
verified author	:	Tiger
verified purpose:	????????up??down?????????????????д?????input??
**************************************************/
/*************************************************
verified time 	:	2009/11/16   9:33
verified author	:	Tiger
verified purpose:	bylouа汾????
**************************************************/
jQuery.autocomplete = function(input, options) {
    // Create a link to self
    var me = this;

    // Create jQuery object for input element
    var $input = $(input).attr("autocomplete", "off");

    // Apply inputClass if necessary
    if (options.inputClass) $input.addClass(options.inputClass);

    // Create results
    var results = document.createElement("div");
    // Create jQuery object for results
    var $results = $(results);
    $results.hide().addClass(options.resultsClass).css({ "position": "absolute", "z-index": "999" });
    if (options.width > 0) $results.css("width", options.width);

    // Add to body element
    $("body").append(results);

    input.autocompleter = me;

    var timeout = null;
    var prev = "";
    var active = -1;
    var cache = {};
    var keyb = false;
    var hasFocus = false;
    var lastKeyPressCode = null;

    // flush cache
    function flushCache() {
        cache = {};
        cache.data = {};
        cache.length = 0;
    }

    // flush cache
    flushCache();

    if (options.data) {
        cache.data = options.data; //{"?":[["???蹫?"]],"a":[["aba"]]};
        cache.length = 2;
    } else {
        cache.length = 0;
    }


    $input
	.keyup(function(e) {
	    // track last key pressed
	    lastKeyPressCode = e.keyCode;
	    switch (e.keyCode) {
	        case 38: // up
	            e.preventDefault();
	            moveSelect(-1);
	            break;
	        case 40: // down
	            if ($results.is(":hidden")) {
	                $results.show();
	                active = -1;
	            }
	            e.preventDefault();
	            moveSelect(1);
	            break;
	        case 9:  // tab
	        case 13: // return
	            if (selectCurrent()) {
	                // make sure to blur off the current field
	                $input.get(0).blur();
	                //e.preventDefault();
	            }
	            break;
	        default:
	            active = -1;
	            if (timeout) clearTimeout(timeout);
	            timeout = setTimeout(function() { onChange(); }, options.delay);
	            break;
	    }
	})
	.focus(function() {
	    // track whether the field has focus, we shouldn't process any results if the field no longer has focus
	    hasFocus = true;
	})
	.blur(function() {
	    // track whether the field has focus
	    hasFocus = false;
	    hideResults();
	});

    hideResultsNow();

    function onChange() {
        // ignore if the following keys are pressed: [del] [shift] [capslock]
        //if( lastKeyPressCode == 46 || (lastKeyPressCode > 8 && lastKeyPressCode < 32) ) return $results.hide();
        var v = $input.val();
        if (v == prev) return;
        prev = v;
        if (v.length >= options.minChars) {
            $input.addClass(options.loadingClass);
            requestData(v);
        } else {
            $input.removeClass(options.loadingClass);
            $results.hide();
        }
    }

    function moveSelect(step) {

        var lis = $("li", results);
        if (!lis) return;

        active += step;

        if (active < 0) {
            active = 0;
        } else if (active >= lis.size()) {
            active = lis.size() - 1;
        }

        lis.removeClass("ac_over");

        $(lis[active]).addClass("ac_over");
        $("#txtSearchKw").val($(".r_l", lis[active]).text());

        // Weird behaviour in IE
        // if (lis[active] && lis[active].scrollIntoView) {
        // 	lis[active].scrollIntoView(false);
        // }

    }

    function selectCurrent() {
        var li = $("li.ac_over", results)[0];
        if (!li) {
            var $li = $("li", results);
            if (options.selectOnly) {
                if ($li.length == 1) li = $li[0];
            } else if (options.selectFirst) {
                li = $li[0];
            }
        }
        if (li) {
            selectItem(li);
            return true;
        } else {
            return false;
        }
    }

    function selectItem(li) {
        if (!li) {
            li = document.createElement("li");
            li.extra = [];
            li.selectValue = "";
        }
        var v = $.trim(li.selectValue ? li.selectValue : li.innerHTML);
        input.lastSelected = v;
        prev = v;
        $results.html("");
        $input.val(v);
        hideResultsNow();
        if (options.onItemSelect) setTimeout(function() { options.onItemSelect(li) }, 1);
        $("#bt_header_search").click();
    }

    // selects a portion of the input string
    function createSelection(start, end) {
        // get a reference to the input element
        var field = $input.get(0);
        if (field.createTextRange) {
            var selRange = field.createTextRange();
            selRange.collapse(true);
            selRange.moveStart("character", start);
            selRange.moveEnd("character", end);
            selRange.select();
        } else if (field.setSelectionRange) {
            field.setSelectionRange(start, end);
        } else {
            if (field.selectionStart) {
                field.selectionStart = start;
                field.selectionEnd = end;
            }
        }
        field.focus();
    }

    // fills in the input box w/the first match (assumed to be the best match)
    function autoFill(sValue) {
        // if the last user key pressed was backspace, don't autofill
        if (lastKeyPressCode != 8) {
            // fill in the value (keep the case the user has typed)
            $input.val($input.val() + sValue.substring(prev.length));
            // select the portion of the value not typed by the user (so the next character will erase)
            createSelection(prev.length, sValue.length);
        }
    }

    function showResults() {
        // get the position of the input field right now (in case the DOM is shifted)
        var pos = findPos(input);
        // either use the specified width, or autocalculate based on form element
        var iWidth = (options.width > 0) ? options.width : $input.width();
        // reposition
        $results.css({
            width: parseInt(iWidth) + "px",
            top: (pos.y + input.offsetHeight) + "px",
            left: pos.x + "px"
        }).show();
    }

    function hideResults() {
        if (timeout) clearTimeout(timeout);
        timeout = setTimeout(hideResultsNow, 200);
    }

    function hideResultsNow() {
        if (timeout) clearTimeout(timeout);
        $input.removeClass(options.loadingClass);
        if ($results.is(":visible")) {
            $results.hide();
        }
        if (options.mustMatch) {
            var v = $input.val();
            if (v != input.lastSelected) {
                selectItem(null);
            }
        }
    }

    function receiveData(q, data) {
        if (data) {
            $input.removeClass(options.loadingClass);
            results.innerHTML = "";

            // if the field no longer has focus or if there are no matches, do not display the drop down
            //if( !hasFocus || data.length == 0 ) return hideResultsNow();

            if ($.browser.msie) {
                // we put a styled iframe behind the calendar so HTML SELECT elements don't show through
                $results.append(document.createElement('iframe'));
            }
            results.appendChild(dataToDom(data));
            // autofill in the complete box w/the first match as long as the user hasn't entered in more data
            if (options.autoFill && ($input.val().toLowerCase() == q.toLowerCase())) autoFill(data[0][0]);
            showResults();
        } else {
            hideResultsNow();
        }
    }

    function parseData(data) {
        if (!data) return null;
        var parsed = [];
        var rows = data.split(options.lineSeparator);
        for (var i = 0; i < rows.length; i++) {
            var row = $.trim(rows[i]);
            if (row) {
                parsed[parsed.length] = row.split(options.cellSeparator);
            }
        }
        return parsed;
    };

    function dataToDom(data) {
        var ul = document.createElement("ul");
        var num = data.length;

        // limited results to a max number
        if ((options.maxItemsToShow > 0) && (options.maxItemsToShow < num)) num = options.maxItemsToShow;

        for (var i = 0; i < num; i++) {
            var row = data[i];
            if (!row) continue;
            var li = document.createElement("li");
            if (options.formatItem) {
                li.innerHTML = options.formatItem(row, i, num);
                li.selectValue = row[0];
            } else {
                li.innerHTML = '<span class="r_l">' + row[0] + "</span>" + '<span class="r_r">' + row[1] + "\u7ED3\u679C</span>"; //.join(" ");
                li.selectValue = row[0]; //.join(" ");
            }
            var extra = null;
            if (row.length > 1) {
                extra = [];
                for (var j = 1; j < row.length; j++) {
                    extra[extra.length] = row[j];
                }
            }
            li.extra = extra;
            ul.appendChild(li);
            $(li)
            .hover(
				function() { $("li", ul).removeClass("ac_over"); $(this).addClass("ac_over"); active = $("li", ul).indexOf($(this).get(0)); },
				function() { $(this).removeClass("ac_over"); }
			)
			.click(function(e) {
			    e.preventDefault();
			    e.stopPropagation();
			    selectItem(this);
			});
        }
        return ul;
    }

    function requestData(q) {//
        if (!options.matchCase) q = q.toLowerCase();
        var data = options.cacheLength ? loadFromCache(q) : null;
        // recieve the cached data
        if (data) {
            receiveData(q, data);
            // if an AJAX url has been supplied, try loading the data now
        } else if ((typeof options.url == "string") && (options.url.length > 0)) {
            $.getJSON(makeUrl(q), function(data) {
                //data = parseData(data);
                //addToCache(q, data);
                receiveData(q, data);
            });
            // if there's been no data found, remove the loading class
        } else {
            $input.removeClass(options.loadingClass);
        }
    }

    function makeUrl(q) {
        var type = $(".searchon a").attr("class");
        var url = options.url + "?q=" + encodeURI(q) + "&t=" + encodeURI(type);
        for (var i in options.extraParams) {
            url += "&" + i + "=" + encodeURI(options.extraParams[i]);
        }
        return url;
    }

    function loadFromCache(q) {//
        var tempStr = "";

        if (q.indexOf(" ")) {
            tempStr = q.substring(0, q.indexOf(" "));
        }
        if (!q) return null;
        if (cache.data[q]) return cache.data[q];
        if (options.matchSubset) {
            for (var i = q.length - 1; i >= options.minChars; i--) {
                var qs = q.substr(0, i);
                var c = cache.data[qs];
                if (c) {
                    var csub = [];
                    for (var j = 0; j < c.length; j++) {
                        var x = c[j];
                        var x0 = x[0];
                        if (matchSubset(x0, $.trim(q))) {
                            csub[csub.length] = x;
                        }
                    }
                    return csub;
                }
            }
        }
        return null;
    }

    function matchSubset(s, sub) {
        if (!options.matchCase) s = s.toLowerCase();
        var i = s.indexOf(sub);
        if (i == -1) return false;
        return i == 0 || options.matchContains;
    }

    //	this.flushCache = function() {
    //		flushCache();
    //	};

    //	this.setExtraParams = function(p) {
    //		options.extraParams = p;
    //	};

    //	this.findValue = function(){
    //		var q = $input.val();

    //		if (!options.matchCase) q = q.toLowerCase();
    //		var data = options.cacheLength ? loadFromCache(q) : null;
    //		if (data) {
    //			findValueCallback(q, data);
    //		} else if( (typeof options.url == "string") && (options.url.length > 0) ){
    //			$.get(makeUrl(q), function(data) {
    //				data = parseData(data)
    //				addToCache(q, data);
    //				findValueCallback(q, data);
    //			});
    //		} else {
    //			// no matches
    //			findValueCallback(q, null);
    //		}
    //	}

    //	function findValueCallback(q, data){
    //		if (data) $input.removeClass(options.loadingClass);

    //		var num = (data) ? data.length : 0;
    //		var li = null;

    //		for (var i=0; i < num; i++) {
    //			var row = data[i];

    //			if( row[0].toLowerCase() == q.toLowerCase() ){
    //				li = document.createElement("li");
    //				if (options.formatItem) {
    //					li.innerHTML = options.formatItem(row, i, num);
    //					li.selectValue = row[0];
    //				} else {
    //					li.innerHTML = row[0];
    //					li.selectValue = row[0];
    //				}
    //				var extra = null;
    //				if( row.length > 1 ){
    //					extra = [];
    //					for (var j=1; j < row.length; j++) {
    //						extra[extra.length] = row[j];
    //					}
    //				}
    //				li.extra = extra;
    //			}
    //		}

    //		if( options.onFindValue ) setTimeout(function() { options.onFindValue(li) }, 1);
    //	}

    function addToCache(q, data) {
        if (!data || !q || !options.cacheLength) return;
        if (!cache.length || cache.length > options.cacheLength) {
            flushCache();
            cache.length++;
        } else if (!cache[q]) {
            cache.length++;
        }
        cache.data[q] = data;
    };

    function findPos(obj) {
        var curleft = obj.offsetLeft || 0;
        var curtop = obj.offsetTop || 0;
        while (obj = obj.offsetParent) {
            curleft += obj.offsetLeft;
            curtop += obj.offsetTop;
        }
        return { x: curleft, y: curtop };
    }
};

jQuery.fn.autocomplete = function(url, options, data) {
    // Make sure options exists
    options = options || {};
    // Set url as option
    options.url = url;
    // set some bulk local data
    options.data = data;

    // Set default values for required options
    options.inputClass = options.inputClass || "ac_input";
    options.resultsClass = options.resultsClass || "ac_results";
    options.lineSeparator = options.lineSeparator || "\n";
    options.cellSeparator = options.cellSeparator || "|";
    options.minChars = options.minChars || 1;
    options.delay = options.delay || 400;
    options.matchCase = options.matchCase || 0;
    options.matchSubset = options.matchSubset || 1;
    options.matchContains = options.matchContains || 0;
    options.cacheLength = options.cacheLength || 1;
    options.mustMatch = options.mustMatch || 0;
    options.extraParams = options.extraParams || {};
    options.loadingClass = options.loadingClass || "ac_loading";
    options.selectFirst = options.selectFirst || false;
    options.selectOnly = options.selectOnly || false;
    options.maxItemsToShow = options.maxItemsToShow || -1;
    options.autoFill = options.autoFill || false;
    options.width = parseInt(options.width, 10) || 0;

    this.each(function() {
        var input = this;
        new jQuery.autocomplete(input, options);
    });

    // Don't break the chain
    return this;
};

//jQuery.fn.autocompleteArray = function(data, options) {
//	return this.autocomplete(null, options, data);
//}

jQuery.fn.indexOf = function(e) {
    for (var i = 0; i < this.length; i++) {
        if (this[i] == e) return i;
    }
    return -1;
};
$(function() {
    // 搜索自动提示功能初始化
    $("#search_input").autocomplete(
        "/" + "ajax/ac_results.aspx",
        {
            delay: 10,
            minChars: 1,
            matchSubset: 1,
            //onItemSelect:selectItem,
            //onFindValue:findValue,
            autoFill: false,
            maxItemsToShow: 10
        }
    );

});