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Tomas Kirda
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src/jquery.autocomplete.js
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390
src/jquery.autocomplete.js
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/**
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* Ajax Autocomplete for jQuery, version 1.1.3
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* (c) 2010 Tomas Kirda
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*
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* Ajax Autocomplete for jQuery is freely distributable under the terms of an MIT-style license.
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* For details, see the web site: http://www.devbridge.com/projects/autocomplete/jquery/
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*
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* Last Review: 04/19/2010
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*/
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/*jslint onevar: true, evil: true, nomen: true, eqeqeq: true, bitwise: true, regexp: true, newcap: true, immed: true */
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/*global window: true, document: true, clearInterval: true, setInterval: true, jQuery: true */
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(function($) {
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var reEscape = new RegExp('(\\' + ['/', '.', '*', '+', '?', '|', '(', ')', '[', ']', '{', '}', '\\'].join('|\\') + ')', 'g');
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function fnFormatResult(value, data, currentValue) {
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var pattern = '(' + currentValue.replace(reEscape, '\\$1') + ')';
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return value.replace(new RegExp(pattern, 'gi'), '<strong>$1<\/strong>');
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}
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function Autocomplete(el, options) {
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this.el = $(el);
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this.el.attr('autocomplete', 'off');
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this.suggestions = [];
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this.data = [];
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this.badQueries = [];
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this.selectedIndex = -1;
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this.currentValue = this.el.val();
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this.intervalId = 0;
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this.cachedResponse = [];
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this.onChangeInterval = null;
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this.ignoreValueChange = false;
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this.serviceUrl = options.serviceUrl;
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this.isLocal = false;
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this.options = {
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autoSubmit: false,
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minChars: 1,
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maxHeight: 300,
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deferRequestBy: 0,
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width: 0,
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highlight: true,
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params: {},
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fnFormatResult: fnFormatResult,
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delimiter: null,
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zIndex: 9999
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};
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this.initialize();
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this.setOptions(options);
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}
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$.fn.autocomplete = function(options) {
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return new Autocomplete(this.get(0)||$('<input />'), options);
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};
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Autocomplete.prototype = {
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killerFn: null,
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initialize: function() {
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var me, uid, autocompleteElId;
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me = this;
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uid = Math.floor(Math.random()*0x100000).toString(16);
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autocompleteElId = 'Autocomplete_' + uid;
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this.killerFn = function(e) {
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if ($(e.target).parents('.autocomplete').size() === 0) {
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me.killSuggestions();
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me.disableKillerFn();
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}
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};
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if (!this.options.width) { this.options.width = this.el.width(); }
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this.mainContainerId = 'AutocompleteContainter_' + uid;
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$('<div id="' + this.mainContainerId + '" style="position:absolute;z-index:9999;"><div class="autocomplete-w1"><div class="autocomplete" id="' + autocompleteElId + '" style="display:none; width:300px;"></div></div></div>').appendTo('body');
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this.container = $('#' + autocompleteElId);
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this.fixPosition();
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if (window.opera) {
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this.el.keypress(function(e) { me.onKeyPress(e); });
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} else {
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this.el.keydown(function(e) { me.onKeyPress(e); });
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}
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this.el.keyup(function(e) { me.onKeyUp(e); });
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this.el.blur(function() { me.enableKillerFn(); });
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this.el.focus(function() { me.fixPosition(); });
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},
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setOptions: function(options){
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var o = this.options;
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$.extend(o, options);
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if(o.lookup){
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this.isLocal = true;
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if($.isArray(o.lookup)){ o.lookup = { suggestions:o.lookup, data:[] }; }
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}
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$('#'+this.mainContainerId).css({ zIndex:o.zIndex });
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this.container.css({ maxHeight: o.maxHeight + 'px', width:o.width });
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},
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clearCache: function(){
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this.cachedResponse = [];
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this.badQueries = [];
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},
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disable: function(){
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this.disabled = true;
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},
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enable: function(){
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this.disabled = false;
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},
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fixPosition: function() {
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var offset = this.el.offset();
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$('#' + this.mainContainerId).css({ top: (offset.top + this.el.innerHeight()) + 'px', left: offset.left + 'px' });
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},
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enableKillerFn: function() {
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var me = this;
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$(document).bind('click', me.killerFn);
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},
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disableKillerFn: function() {
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var me = this;
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$(document).unbind('click', me.killerFn);
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},
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killSuggestions: function() {
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var me = this;
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this.stopKillSuggestions();
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this.intervalId = window.setInterval(function() { me.hide(); me.stopKillSuggestions(); }, 300);
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},
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stopKillSuggestions: function() {
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window.clearInterval(this.intervalId);
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},
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onKeyPress: function(e) {
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if (this.disabled || !this.enabled) { return; }
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// return will exit the function
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// and event will not be prevented
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switch (e.keyCode) {
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case 27: //KEY_ESC:
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this.el.val(this.currentValue);
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this.hide();
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break;
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case 9: //KEY_TAB:
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case 13: //KEY_RETURN:
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if (this.selectedIndex === -1) {
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this.hide();
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return;
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}
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this.select(this.selectedIndex);
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if(e.keyCode === 9){ return; }
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break;
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case 38: //KEY_UP:
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this.moveUp();
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break;
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case 40: //KEY_DOWN:
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this.moveDown();
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break;
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default:
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return;
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}
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e.stopImmediatePropagation();
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e.preventDefault();
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},
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onKeyUp: function(e) {
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if(this.disabled){ return; }
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switch (e.keyCode) {
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case 38: //KEY_UP:
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case 40: //KEY_DOWN:
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return;
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}
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clearInterval(this.onChangeInterval);
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if (this.currentValue !== this.el.val()) {
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if (this.options.deferRequestBy > 0) {
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// Defer lookup in case when value changes very quickly:
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var me = this;
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this.onChangeInterval = setInterval(function() { me.onValueChange(); }, this.options.deferRequestBy);
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} else {
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this.onValueChange();
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}
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}
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},
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onValueChange: function() {
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clearInterval(this.onChangeInterval);
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this.currentValue = this.el.val();
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var q = this.getQuery(this.currentValue);
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this.selectedIndex = -1;
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if (this.ignoreValueChange) {
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this.ignoreValueChange = false;
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return;
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}
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if (q === '' || q.length < this.options.minChars) {
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this.hide();
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} else {
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this.getSuggestions(q);
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}
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},
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getQuery: function(val) {
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var d, arr;
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d = this.options.delimiter;
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if (!d) { return $.trim(val); }
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arr = val.split(d);
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return $.trim(arr[arr.length - 1]);
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},
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getSuggestionsLocal: function(q) {
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var ret, arr, len, val, i;
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arr = this.options.lookup;
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len = arr.suggestions.length;
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ret = { suggestions:[], data:[] };
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q = q.toLowerCase();
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for(i=0; i< len; i++){
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val = arr.suggestions[i];
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if(val.toLowerCase().indexOf(q) === 0){
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ret.suggestions.push(val);
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ret.data.push(arr.data[i]);
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}
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}
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return ret;
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},
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getSuggestions: function(q) {
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var cr, me;
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cr = this.isLocal ? this.getSuggestionsLocal(q) : this.cachedResponse[q];
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if (cr && $.isArray(cr.suggestions)) {
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this.suggestions = cr.suggestions;
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this.data = cr.data;
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this.suggest();
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} else if (!this.isBadQuery(q)) {
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me = this;
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me.options.params.query = q;
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$.get(this.serviceUrl, me.options.params, function(txt) { me.processResponse(txt); }, 'text');
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}
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},
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isBadQuery: function(q) {
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var i = this.badQueries.length;
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while (i--) {
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if (q.indexOf(this.badQueries[i]) === 0) { return true; }
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}
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return false;
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},
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hide: function() {
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this.enabled = false;
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this.selectedIndex = -1;
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this.container.hide();
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},
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suggest: function() {
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if (this.suggestions.length === 0) {
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this.hide();
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return;
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}
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var me, len, div, f, v, i, s, mOver, mClick;
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me = this;
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len = this.suggestions.length;
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f = this.options.fnFormatResult;
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v = this.getQuery(this.currentValue);
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mOver = function(xi) { return function() { me.activate(xi); }; };
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mClick = function(xi) { return function() { me.select(xi); }; };
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this.container.hide().empty();
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for (i = 0; i < len; i++) {
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s = this.suggestions[i];
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div = $((me.selectedIndex === i ? '<div class="selected"' : '<div') + ' title="' + s + '">' + f(s, this.data[i], v) + '</div>');
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div.mouseover(mOver(i));
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div.click(mClick(i));
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this.container.append(div);
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}
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this.enabled = true;
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this.container.show();
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},
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processResponse: function(text) {
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var response;
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try {
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response = eval('(' + text + ')');
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} catch (err) { return; }
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if (!$.isArray(response.data)) { response.data = []; }
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if(!this.options.noCache){
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this.cachedResponse[response.query] = response;
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if (response.suggestions.length === 0) { this.badQueries.push(response.query); }
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}
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if (response.query === this.getQuery(this.currentValue)) {
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this.suggestions = response.suggestions;
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this.data = response.data;
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this.suggest();
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}
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},
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activate: function(index) {
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var divs, activeItem;
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divs = this.container.children();
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// Clear previous selection:
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if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
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$(divs.get(this.selectedIndex)).removeClass();
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}
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this.selectedIndex = index;
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if (this.selectedIndex !== -1 && divs.length > this.selectedIndex) {
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activeItem = divs.get(this.selectedIndex);
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$(activeItem).addClass('selected');
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}
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return activeItem;
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},
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deactivate: function(div, index) {
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div.className = '';
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if (this.selectedIndex === index) { this.selectedIndex = -1; }
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},
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select: function(i) {
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var selectedValue, f;
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selectedValue = this.suggestions[i];
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if (selectedValue) {
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this.el.val(selectedValue);
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if (this.options.autoSubmit) {
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f = this.el.parents('form');
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if (f.length > 0) { f.get(0).submit(); }
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}
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this.ignoreValueChange = true;
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this.hide();
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this.onSelect(i);
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}
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},
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moveUp: function() {
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if (this.selectedIndex === -1) { return; }
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if (this.selectedIndex === 0) {
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this.container.children().get(0).className = '';
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this.selectedIndex = -1;
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this.el.val(this.currentValue);
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return;
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}
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this.adjustScroll(this.selectedIndex - 1);
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},
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moveDown: function() {
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if (this.selectedIndex === (this.suggestions.length - 1)) { return; }
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this.adjustScroll(this.selectedIndex + 1);
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},
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adjustScroll: function(i) {
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var activeItem, offsetTop, upperBound, lowerBound;
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activeItem = this.activate(i);
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offsetTop = activeItem.offsetTop;
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upperBound = this.container.scrollTop();
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lowerBound = upperBound + this.options.maxHeight - 25;
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if (offsetTop < upperBound) {
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this.container.scrollTop(offsetTop);
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} else if (offsetTop > lowerBound) {
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this.container.scrollTop(offsetTop - this.options.maxHeight + 25);
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}
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this.el.val(this.getValue(this.suggestions[i]));
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},
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onSelect: function(i) {
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var me, fn, s, d;
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me = this;
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fn = me.options.onSelect;
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s = me.suggestions[i];
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d = me.data[i];
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me.el.val(me.getValue(s));
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if ($.isFunction(fn)) { fn(s, d, me.el); }
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},
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getValue: function(value){
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var del, currVal, arr, me;
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me = this;
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del = me.options.delimiter;
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if (!del) { return value; }
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currVal = me.currentValue;
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arr = currVal.split(del);
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if (arr.length === 1) { return value; }
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return currVal.substr(0, currVal.length - arr[arr.length - 1].length) + value;
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}
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};
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}(jQuery));
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