760 lines
20 KiB
JavaScript
760 lines
20 KiB
JavaScript
/*
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* Autocomplete - jQuery plugin 1.1pre
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*
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* Copyright (c) 2007 Dylan Verheul, Dan G. Switzer, Anjesh Tuladhar, Jörn Zaefferer
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*
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* Dual licensed under the MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*
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* Revision: $Id: jquery.autocomplete.js 5785 2008-07-12 10:37:33Z joern.zaefferer $
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*
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*/
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(function($){
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$.fn.extend({
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autocomplete: function(urlOrData, options) {
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var isUrl = typeof urlOrData == "string";
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options = $.extend({}, $.Autocompleter.defaults, {
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url: isUrl ? urlOrData : null,
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data: isUrl ? null : urlOrData,
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delay: isUrl ? $.Autocompleter.defaults.delay : 10,
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max: options && !options.scroll ? 10 : 150
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}, options);
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// if highlight is set to false, replace it with a do-nothing function
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options.highlight = options.highlight || function(value) { return value; };
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// if the formatMatch option is not specified, then use formatItem for backwards compatibility
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options.formatMatch = options.formatMatch || options.formatItem;
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return this.each(function() {
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new $.Autocompleter(this, options);
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});
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},
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result: function(handler) {
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return this.bind("result", handler);
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},
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search: function(handler) {
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return this.trigger("search", [handler]);
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},
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flushCache: function() {
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return this.trigger("flushCache"); //trigger是触发事件的方法
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},
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setOptions: function(options){
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return this.trigger("setOptions", [options]);
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},
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unautocomplete: function() {
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return this.trigger("unautocomplete");
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}
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});
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$.Autocompleter = function(input, options) {
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var KEY = {
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UP: 38,
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DOWN: 40,
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DEL: 46,
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TAB: 9,
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RETURN: 13,
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ESC: 27,
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COMMA: 188,
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PAGEUP: 33,
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PAGEDOWN: 34,
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BACKSPACE: 8
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};
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// Create $ object for input element
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var $input = $(input).attr("autocomplete", "off").addClass(options.inputClass);
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var timeout;
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var previousValue = "";
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var cache = $.Autocompleter.Cache(options);
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var hasFocus = 0;
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var lastKeyPressCode;
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var config = {
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mouseDownOnSelect: false
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};
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var select = $.Autocompleter.Select(options, input, selectCurrent, config);
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var blockSubmit;
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// prevent form submit in opera when selecting with return key
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$.browser.opera && $(input.form).bind("submit.autocomplete", function() {
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if (blockSubmit) {
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blockSubmit = false;
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return false;
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}
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});
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// only opera doesn't trigger keydown multiple times while pressed, others don't work with keypress at all
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$input.bind(($.browser.opera ? "keypress" : "keydown") + ".autocomplete", function(event) {
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// track last key pressed
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lastKeyPressCode = event.keyCode;
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switch(event.keyCode) {
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case KEY.UP:
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event.preventDefault();
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if ( select.visible() ) {
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select.prev();
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} else {
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onChange(0, true);
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}
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break;
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case KEY.DOWN:
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event.preventDefault();
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if ( select.visible() ) {
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select.next();
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} else {
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onChange(0, true);
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}
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break;
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case KEY.PAGEUP:
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event.preventDefault();
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if ( select.visible() ) {
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select.pageUp();
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} else {
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onChange(0, true);
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}
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break;
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case KEY.PAGEDOWN:
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event.preventDefault();
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if ( select.visible() ) {
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select.pageDown();
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} else {
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onChange(0, true);
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}
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break;
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// matches also semicolon
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case options.multiple && $.trim(options.multipleSeparator) == "," && KEY.COMMA:
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case KEY.TAB:
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case KEY.RETURN:
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if( selectCurrent() ) {
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// stop default to prevent a form submit, Opera needs special handling
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event.preventDefault();
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blockSubmit = true;
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return false;
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}
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break;
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case KEY.ESC:
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select.hide();
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break;
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default:
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clearTimeout(timeout);
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timeout = setTimeout(onChange, options.delay);
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break;
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}
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}).focus(function(){
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// track whether the field has focus, we shouldn't process any
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// results if the field no longer has focus
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hasFocus++;
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}).blur(function() {
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hasFocus = 0;
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if (!config.mouseDownOnSelect) {
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hideResults();
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}
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}).click(function() {
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// show select when clicking in a focused field
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if ( hasFocus++ > 1 && !select.visible() ) {
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onChange(0, true);
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}
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}).bind("search", function() {
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// TODO why not just specifying both arguments?
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var fn = (arguments.length > 1) ? arguments[1] : null;
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function findValueCallback(q, data) {
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var result;
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if( data && data.length ) {
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for (var i=0; i < data.length; i++) {
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if( data[i].result.toLowerCase() == q.toLowerCase() ) {
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result = data[i];
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break;
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}
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}
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}
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if( typeof fn == "function" ) fn(result);
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else $input.trigger("result", result && [result.data, result.value]);
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}
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$.each(trimWords($input.val()), function(i, value) {
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request(value, findValueCallback, findValueCallback);
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});
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}).bind("flushCache", function() {
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cache.flush();
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}).bind("setOptions", function() {
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$.extend(options, arguments[1]);
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// if we've updated the data, repopulate
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if ( "data" in arguments[1] )
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cache.populate();
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}).bind("unautocomplete", function() {
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select.unbind();
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$input.unbind();
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$(input.form).unbind(".autocomplete");
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});
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function selectCurrent() {
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var selected = select.selected();
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if( !selected )
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return false;
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var v = selected.result;
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previousValue = v;
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if ( options.multiple ) {
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var words = trimWords($input.val());
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if ( words.length > 1 ) {
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v = words.slice(0, words.length - 1).join( options.multipleSeparator ) + options.multipleSeparator + v;
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}
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v += options.multipleSeparator;
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}
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$input.val(v);
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hideResultsNow();
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$input.trigger("result", [selected.data, selected.value]);
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return true;
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}
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function onChange(crap, skipPrevCheck) {
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if( lastKeyPressCode == KEY.DEL ) {
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select.hide();
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return;
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}
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var currentValue = $input.val();
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if ( !skipPrevCheck && currentValue == previousValue )
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return;
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previousValue = currentValue;
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currentValue = lastWord(currentValue);
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if ( currentValue.length >= options.minChars) {
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$input.addClass(options.loadingClass);
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if (!options.matchCase)
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currentValue = currentValue.toLowerCase();
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request(currentValue, receiveData, hideResultsNow);
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} else {
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stopLoading();
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select.hide();
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}
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};
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function trimWords(value) {
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if ( !value ) {
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return [""];
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}
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var words = value.split( options.multipleSeparator );
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var result = [];
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$.each(words, function(i, value) {
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if ( $.trim(value) )
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result[i] = $.trim(value);
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});
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return result;
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}
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function lastWord(value) {
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if ( !options.multiple )
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return value;
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var words = trimWords(value);
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return words[words.length - 1];
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}
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// fills in the input box w/the first match (assumed to be the best match)
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// q: the term entered
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// sValue: the first matching result
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function autoFill(q, sValue){
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// autofill in the complete box w/the first match as long as the user hasn't entered in more data
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// if the last user key pressed was backspace, don't autofill
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if( options.autoFill && (lastWord($input.val()).toLowerCase() == q.toLowerCase()) && lastKeyPressCode != KEY.BACKSPACE ) {
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// fill in the value (keep the case the user has typed)
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$input.val($input.val() + sValue.substring(lastWord(previousValue).length));
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// select the portion of the value not typed by the user (so the next character will erase)
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$.Autocompleter.Selection(input, previousValue.length, previousValue.length + sValue.length);
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}
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};
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function hideResults() {
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clearTimeout(timeout);
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timeout = setTimeout(hideResultsNow, 200);
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};
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function hideResultsNow() {
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var wasVisible = select.visible();
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select.hide();
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clearTimeout(timeout);
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stopLoading();
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if (options.mustMatch) {
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// call search and run callback
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$input.search(
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function (result){
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// if no value found, clear the input box
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if( !result ) {
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if (options.multiple) {
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var words = trimWords($input.val()).slice(0, -1);
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$input.val( words.join(options.multipleSeparator) + (words.length ? options.multipleSeparator : "") );
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}
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else
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$input.val( "" );
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}
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}
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);
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}
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if (wasVisible)
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// position cursor at end of input field
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$.Autocompleter.Selection(input, input.value.length, input.value.length);
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};
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function receiveData(q, data) {
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if ( data && data.length && hasFocus ) {
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stopLoading();
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select.display(data, q);
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autoFill(q, data[0].value);
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select.show();
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} else {
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hideResultsNow();
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}
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};
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function request(term, success, failure) {
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if (!options.matchCase)
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term = term.toLowerCase();
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var data = cache.load(term);
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// recieve the cached data
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if (data && data.length) {
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success(term, data);
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// if an AJAX url has been supplied, try loading the data now
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} else if( (typeof options.url == "string") && (options.url.length > 0) ){
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var extraParams = {
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timestamp: +new Date()
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};
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$.each(options.extraParams, function(key, param) {
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extraParams[key] = typeof param == "function" ? param() : param;
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});
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$.ajax({
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// try to leverage ajaxQueue plugin to abort previous requests
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mode: "abort",
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// limit abortion to this input
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port: "autocomplete" + input.name,
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dataType: options.dataType,
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url: options.url,
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data: $.extend({
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q: lastWord(term),
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limit: options.max
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}, extraParams),
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success: function(data) {
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var parsed = options.parse && options.parse(data) || parse(data);
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cache.add(term, parsed);
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success(term, parsed);
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}
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});
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} else {
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// if we have a failure, we need to empty the list -- this prevents the the [TAB] key from selecting the last successful match
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select.emptyList();
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failure(term);
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}
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};
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function parse(data) {
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var parsed = [];
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var rows = data.split("\n");
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for (var i=0; i < rows.length; i++) {
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var row = $.trim(rows[i]);
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if (row) {
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row = row.split("|");
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parsed[parsed.length] = {
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data: row,
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value: row[0],
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result: options.formatResult && options.formatResult(row, row[0]) || row[0]
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};
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}
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}
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return parsed;
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};
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function stopLoading() {
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$input.removeClass(options.loadingClass);
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};
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};
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$.Autocompleter.defaults = {
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inputClass: "ac_input",
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resultsClass: "ac_results",
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loadingClass: "ac_loading",
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minChars: 1,
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delay: 400,
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matchCase: false,
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matchSubset: true,
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matchContains: false,
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cacheLength: 10,
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max: 100,
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mustMatch: false,
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extraParams: {},
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selectFirst: true,
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formatItem: function(row) { return row[0]; },
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formatMatch: null,
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autoFill: false,
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width: 0,
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multiple: false,
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multipleSeparator: ", ",
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highlight: function(value, term) {
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return value.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + term.replace(/([\^\$\(\)\[\]\{\}\*\.\+\?\|\\])/gi, "\\$1") + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>");
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},
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scroll: true,
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scrollHeight: 180
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};
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$.Autocompleter.Cache = function(options) {
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var data = {};
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var length = 0;
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function matchSubset(s, sub) {
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if (!options.matchCase)
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s = s.toLowerCase();
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var i = s.indexOf(sub);
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if (options.matchContains == "word"){
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i = s.toLowerCase().search("\\b" + sub.toLowerCase());
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}
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if (i == -1) return false;
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return i == 0 || options.matchContains;
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};
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function add(q, value) {
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if (length > options.cacheLength){
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flush();
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}
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if (!data[q]){
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length++;
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}
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data[q] = value;
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}
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function populate(){
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if( !options.data ) return false;
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// track the matches
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var stMatchSets = {},
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nullData = 0;
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// no url was specified, we need to adjust the cache length to make sure it fits the local data store
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if( !options.url ) options.cacheLength = 1;
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// track all options for minChars = 0
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stMatchSets[""] = [];
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// loop through the array and create a lookup structure
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for ( var i = 0, ol = options.data.length; i < ol; i++ ) {
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var rawValue = options.data[i];
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// if rawValue is a string, make an array otherwise just reference the array
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rawValue = (typeof rawValue == "string") ? [rawValue] : rawValue;
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var value = options.formatMatch(rawValue, i+1, options.data.length);
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if ( value === false )
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continue;
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var firstChar = value.charAt(0).toLowerCase();
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// if no lookup array for this character exists, look it up now
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if( !stMatchSets[firstChar] )
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stMatchSets[firstChar] = [];
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// if the match is a string
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var row = {
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value: value,
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data: rawValue,
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result: options.formatResult && options.formatResult(rawValue) || value
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};
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// push the current match into the set list
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stMatchSets[firstChar].push(row);
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// keep track of minChars zero items
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if ( nullData++ < options.max ) {
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stMatchSets[""].push(row);
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}
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};
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// add the data items to the cache
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$.each(stMatchSets, function(i, value) {
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// increase the cache size
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options.cacheLength++;
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// add to the cache
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add(i, value);
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});
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}
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// populate any existing data
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setTimeout(populate, 25);
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function flush(){
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data = {};
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length = 0;
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}
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return {
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flush: flush,
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add: add,
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populate: populate,
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load: function(q) {
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if (!options.cacheLength || !length)
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return null;
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/*
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* if dealing w/local data and matchContains than we must make sure
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* to loop through all the data collections looking for matches
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*/
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if( !options.url && options.matchContains ){
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// track all matches
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var csub = [];
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// loop through all the data grids for matches
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for( var k in data ){
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// don't search through the stMatchSets[""] (minChars: 0) cache
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// this prevents duplicates
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if( k.length > 0 ){
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var c = data[k];
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$.each(c, function(i, x) {
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// if we've got a match, add it to the array
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if (matchSubset(x.value, q)) {
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csub.push(x);
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}
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});
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}
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}
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return csub;
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} else
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// if the exact item exists, use it
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if (data[q]){
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return data[q];
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} else
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if (options.matchSubset) {
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for (var i = q.length - 1; i >= options.minChars; i--) {
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var c = data[q.substr(0, i)];
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if (c) {
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var csub = [];
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$.each(c, function(i, x) {
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if (matchSubset(x.value, q)) {
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csub[csub.length] = x;
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}
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});
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return csub;
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}
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}
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}
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return null;
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}
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};
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};
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$.Autocompleter.Select = function (options, input, select, config) {
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var CLASSES = {
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ACTIVE: "ac_over"
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};
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var listItems,
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active = -1,
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data,
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term = "",
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needsInit = true,
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element,
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list;
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// Create results
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function init() {
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if (!needsInit)
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return;
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element = $("<div/>")
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.hide()
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.addClass(options.resultsClass)
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|
.css("position", "absolute")
|
|
.appendTo(document.body);
|
|
|
|
list = $("<ul/>").appendTo(element).mouseover( function(event) {
|
|
if(target(event).nodeName && target(event).nodeName.toUpperCase() == 'LI') {
|
|
active = $("li", list).removeClass(CLASSES.ACTIVE).index(target(event));
|
|
$(target(event)).addClass(CLASSES.ACTIVE);
|
|
}
|
|
}).click(function(event) {
|
|
$(target(event)).addClass(CLASSES.ACTIVE);
|
|
select();
|
|
// TODO provide option to avoid setting focus again after selection? useful for cleanup-on-focus
|
|
input.focus();
|
|
return false;
|
|
}).mousedown(function() {
|
|
config.mouseDownOnSelect = true;
|
|
}).mouseup(function() {
|
|
config.mouseDownOnSelect = false;
|
|
});
|
|
|
|
if( options.width > 0 )
|
|
element.css("width", options.width);
|
|
|
|
needsInit = false;
|
|
}
|
|
|
|
function target(event) {
|
|
var element = event.target;
|
|
while(element && element.tagName != "LI")
|
|
element = element.parentNode;
|
|
// more fun with IE, sometimes event.target is empty, just ignore it then
|
|
if(!element)
|
|
return [];
|
|
return element;
|
|
}
|
|
|
|
function moveSelect(step) {
|
|
listItems.slice(active, active + 1).removeClass(CLASSES.ACTIVE);
|
|
movePosition(step);
|
|
var activeItem = listItems.slice(active, active + 1).addClass(CLASSES.ACTIVE);
|
|
if(options.scroll) {
|
|
var offset = 0;
|
|
listItems.slice(0, active).each(function() {
|
|
offset += this.offsetHeight;
|
|
});
|
|
if((offset + activeItem[0].offsetHeight - list.scrollTop()) > list[0].clientHeight) {
|
|
list.scrollTop(offset + activeItem[0].offsetHeight - list.innerHeight());
|
|
} else if(offset < list.scrollTop()) {
|
|
list.scrollTop(offset);
|
|
}
|
|
}
|
|
};
|
|
|
|
function movePosition(step) {
|
|
active += step;
|
|
if (active < 0) {
|
|
active = listItems.size() - 1;
|
|
} else if (active >= listItems.size()) {
|
|
active = 0;
|
|
}
|
|
}
|
|
|
|
function limitNumberOfItems(available) {
|
|
return options.max && options.max < available
|
|
? options.max
|
|
: available;
|
|
}
|
|
|
|
function fillList() {
|
|
list.empty();
|
|
var max = limitNumberOfItems(data.length);
|
|
for (var i=0; i < max; i++) {
|
|
if (!data[i])
|
|
continue;
|
|
var formatted = options.formatItem(data[i].data, i+1, max, data[i].value, term);
|
|
if ( formatted === false )
|
|
continue;
|
|
var li = $("<li/>").html( options.highlight(formatted, term) ).addClass(i%2 == 0 ? "ac_even" : "ac_odd").appendTo(list)[0];
|
|
$.data(li, "ac_data", data[i]);
|
|
}
|
|
listItems = list.find("li");
|
|
if ( options.selectFirst ) {
|
|
listItems.slice(0, 1).addClass(CLASSES.ACTIVE);
|
|
active = 0;
|
|
}
|
|
// apply bgiframe if available
|
|
if ( $.fn.bgiframe )
|
|
list.bgiframe();
|
|
}
|
|
|
|
return {
|
|
display: function(d, q) {
|
|
init();
|
|
data = d;
|
|
term = q;
|
|
fillList();
|
|
},
|
|
next: function() {
|
|
moveSelect(1);
|
|
},
|
|
prev: function() {
|
|
moveSelect(-1);
|
|
},
|
|
pageUp: function() {
|
|
if (active != 0 && active - 8 < 0) {
|
|
moveSelect( -active );
|
|
} else {
|
|
moveSelect(-8);
|
|
}
|
|
},
|
|
pageDown: function() {
|
|
if (active != listItems.size() - 1 && active + 8 > listItems.size()) {
|
|
moveSelect( listItems.size() - 1 - active );
|
|
} else {
|
|
moveSelect(8);
|
|
}
|
|
},
|
|
hide: function() {
|
|
element && element.hide();
|
|
listItems && listItems.removeClass(CLASSES.ACTIVE);
|
|
active = -1;
|
|
},
|
|
visible : function() {
|
|
return element && element.is(":visible");
|
|
},
|
|
current: function() {
|
|
return this.visible() && (listItems.filter("." + CLASSES.ACTIVE)[0] || options.selectFirst && listItems[0]);
|
|
},
|
|
show: function() {
|
|
var offset = $(input).offset();
|
|
element.css({
|
|
width: typeof options.width == "string" || options.width > 0 ? options.width : $(input).width(),
|
|
top: offset.top + input.offsetHeight,
|
|
left: offset.left
|
|
}).show();
|
|
if(options.scroll) {
|
|
list.scrollTop(0);
|
|
list.css({
|
|
maxHeight: options.scrollHeight,
|
|
overflow: 'auto'
|
|
});
|
|
|
|
if($.browser.msie && typeof document.body.style.maxHeight === "undefined") {
|
|
var listHeight = 0;
|
|
listItems.each(function() {
|
|
listHeight += this.offsetHeight;
|
|
});
|
|
var scrollbarsVisible = listHeight > options.scrollHeight;
|
|
list.css('height', scrollbarsVisible ? options.scrollHeight : listHeight );
|
|
if (!scrollbarsVisible) {
|
|
// IE doesn't recalculate width when scrollbar disappears
|
|
listItems.width( list.width() - parseInt(listItems.css("padding-left")) - parseInt(listItems.css("padding-right")) );
|
|
}
|
|
}
|
|
|
|
}
|
|
},
|
|
selected: function() {
|
|
var selected = listItems && listItems.filter("." + CLASSES.ACTIVE).removeClass(CLASSES.ACTIVE);
|
|
return selected && selected.length && $.data(selected[0], "ac_data");
|
|
},
|
|
emptyList: function (){
|
|
list && list.empty();
|
|
},
|
|
unbind: function() {
|
|
element && element.remove();
|
|
}
|
|
};
|
|
};
|
|
|
|
$.Autocompleter.Selection = function(field, start, end) {
|
|
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();
|
|
};
|
|
|
|
})(jQuery); |