790 lines
16 KiB
JavaScript
790 lines
16 KiB
JavaScript
jQuery.autocomplete = function(input, options) {
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// Create a link to self
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var me = this;
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// Version
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var version = 1.6;
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// Create jQuery object for input element
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var $input = $(input).attr('autocomplete', 'off');
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// Create jQuery object as a unique request ID
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var $requestId = 1;
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// Maximum request ID (it's kind of silly to have this, but whatever.
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var $MAX_REQUEST_ID = 65000;
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// Apply inputClass if necessary
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if (options.inputClass) {
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$input.addClass(options.inputClass);
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}
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/*
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* Create results (DOM element)
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*/
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var results = document.createElement('div');
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/*
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* Create jQuery object for results
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*
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* var $results = $(results);
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*/
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var $results = $(results).hide().addClass(options.resultsClass).css('position', 'absolute');
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if (options.width > 0) {
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$results.css('width', options.width);
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}
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// Add to body element
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$('body').append(results);
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input.autocompleter = me;
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var timeout = null;
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var prev = '';
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var active = -1;
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var cache = {};
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var keyb = false;
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var hasFocus = false;
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var lastKeyPressCode = null;
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var mouseDownOnSelect = false;
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var hidingResults = false;
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// flush cache
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function flushCache(){
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cache = {};
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cache.data = {};
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cache.length = 0;
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};
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// flush cache
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flushCache();
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// if there is a data array supplied
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if (options.data != null) {
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var sFirstChar = '', stMatchSets = {}, row = [];
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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( typeof options.url != 'string' ) {
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options.cacheLength = 1;
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}
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// loop through the array and create a lookup structure
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for (var i=0; i < options.data.length; i++) {
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// if row is a string, make an array otherwise just reference the array
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row = ((typeof options.data[i] == 'string') ? [options.data[i]] : options.data[i]);
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// if the length is zero, don't add to list
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if( row[0].length > 0 ){
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// get the first character
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sFirstChar = row[0].substring(0, 1).toLowerCase();
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// if no lookup array for this character exists, look it up now
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if( !stMatchSets[sFirstChar] ) stMatchSets[sFirstChar] = [];
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// if the match is a string
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stMatchSets[sFirstChar].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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for( var k in stMatchSets ) {
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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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addToCache(k, stMatchSets[k]);
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}
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}
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$input
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.keydown(function(e) {
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// track last key pressed
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lastKeyPressCode = e.keyCode;
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switch(e.keyCode) {
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case 38: // up
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e.preventDefault();
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moveSelect(-1);
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break;
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case 40: // down
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e.preventDefault();
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moveSelect(1);
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break;
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case 9: // tab
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case 13: // return
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if( selectCurrent() ){
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// make sure to blur off the current field
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$input.get(0).blur();
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e.preventDefault();
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}
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break;
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case 16:
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case 17:
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case 18:
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// shift, control, and alt keys... ignore!
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break;
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default:
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active = -1;
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if (timeout) clearTimeout(timeout);
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timeout = setTimeout(function(){onChange();}, options.delay);
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break;
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}
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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 results if the field no longer has focus
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hasFocus = true;
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})
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.blur(function() {
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// track whether the field has focus
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hasFocus = false;
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if (!mouseDownOnSelect) {
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hideResults();
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}
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});
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hideResultsNow();
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if (options.focus) {
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$input.focus();
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}
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function onChange() {
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// ignore if the following keys are pressed: [del] [shift] [capslock]
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if ((lastKeyPressCode == 46) || ((lastKeyPressCode > 8) && (lastKeyPressCode < 32))) {
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doResultsHide();
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}
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var v = $input.val();
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if (v == prev) return;
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prev = v;
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if (v.length >= options.minChars) {
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$input.addClass(options.loadingClass);
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requestData(v);
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}
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else {
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$input.removeClass(options.loadingClass);
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doResultsHide();
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}
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};
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function moveSelect(step) {
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var lis = $('li', results);
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if (!lis) return;
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active += step;
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if (active < 0) {
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active = 0;
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}
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else if (active >= lis.size()) {
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active = lis.size() - 1;
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}
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lis.removeClass('ac_over');
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$(lis[active]).addClass('ac_over');
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// Weird behaviour in IE
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// if (lis[active] && lis[active].scrollIntoView) {
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// lis[active].scrollIntoView(false);
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// }
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};
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function selectCurrent() {
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var li = $('li.ac_over', results)[0];
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if (!li) {
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var $li = $('li', results);
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if (options.selectOnly) {
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if ($li.length == 1) li = $li[0];
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}
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else if (options.selectFirst) {
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li = $li[0];
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}
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}
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if (li) {
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selectItem(li);
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return true;
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}
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else {
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return false;
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}
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};
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function selectItem(li) {
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if (!li) {
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li = document.createElement('li');
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li.extra = [];
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li.selectValue = '';
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}
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var v = $.trim(li.selectValue ? li.selectValue : li.innerHTML);
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input.lastSelected = v;
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prev = v;
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$results.html('');
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$input.val(v);
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hideResultsNow();
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if (options.onItemSelect) {
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setTimeout(function() {
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options.onItemSelect(li)
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}, 1);
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}
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};
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// selects a portion of the input string
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function createSelection(start, end){
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/*
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* get a reference to the input element
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*/
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var field = $input.get(0);
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if (field.createTextRange) {
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var selRange = field.createTextRange();
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selRange.collapse(true);
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selRange.moveStart('character', start);
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selRange.moveEnd('character', end);
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selRange.select();
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}
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else if (field.setSelectionRange) {
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field.setSelectionRange(start, end);
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}
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else {
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if (field.selectionStart) {
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field.selectionStart = start;
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field.selectionEnd = end;
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}
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}
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field.focus();
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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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function autoFill(sValue) {
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/*
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* if the last user key pressed was backspace, don't autofill
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*/
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if (lastKeyPressCode != 8) {
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/*
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* fill in the value (keep the case the user has typed)
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*/
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$input.val($input.val() + sValue.substring(prev.length));
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/*
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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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*/
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createSelection(prev.length, sValue.length);
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}
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};
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function showResults() {
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/*
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* get the position of the input field right now (in case the DOM is shifted)
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*/
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var pos = findPos(options.popupParent || $input);
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/*
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* either use the specified width, or autocalculate based on form element
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*/
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var iWidth;
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if (options.width > 0) {
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iWidth = options.width;
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}
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else {
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if (options.popupParent) {
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iWidth = options.popupParent.innerWidth();
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}
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else {
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iWidth = $input.innerWidth();
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}
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}
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var height;
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if (options.popupParent) {
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/*
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* for an arbitrary parent, we use inner height... it seems to work better (tighter to parent)
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*/
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height = options.popupParent.innerHeight();
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}
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else {
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/*
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* Otherwise for input fields, use outer height.
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*/
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height = $input.outerHeight();
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}
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/*
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* re-position
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*/
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$results.css({
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width: parseInt(iWidth) + 'px',
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top: (pos.y + height) + 'px',
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left: pos.x + 'px',
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'z-index': pos.zIndex
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});
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doResultsShow();
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};
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function hideResults() {
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if (timeout) clearTimeout(timeout);
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timeout = setTimeout(hideResultsNow, 200);
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};
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function hideResultsNow() {
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if (hidingResults) {
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return;
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}
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hidingResults = true;
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if (timeout) {
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clearTimeout(timeout);
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}
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var v = $input.removeClass(options.loadingClass).val();
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if ($results.is(':visible')) {
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doResultsHide();
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}
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if (options.mustMatch) {
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if (!input.lastSelected || input.lastSelected != v) {
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selectItem(null);
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}
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}
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hidingResults = false;
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};
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function doResultsShow() {
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if (options.resultsId) {
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$results.attr('id', options.resultsId);
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}
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$results.show();
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if (typeof options.onResultsShow === 'function') {
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options.onResultsShow($results[0]);
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}
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};
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function doResultsHide() {
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$results.hide();
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if (typeof options.onResultsHide === 'function') {
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options.onResultsHide($results[0]);
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}
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if (options.resultsId) {
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$results.removeAttr('id');
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}
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};
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function receiveData(q, data) {
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if (data) {
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$input.removeClass(options.loadingClass);
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results.innerHTML = '';
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/*
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* if the field no longer has focus or if there are no matches, do not display the drop down
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*/
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if (!hasFocus || (data.length == 0)) {
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return hideResultsNow();
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}
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if ($.browser.msie) {
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/*
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* we put a styled iframe behind the calendar so HTML SELECT elements don't show through
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*/
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$results.append(document.createElement('iframe'));
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}
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results.appendChild(dataToDom(data));
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if (options.autoFill && ($input.val().toLowerCase() == q.toLowerCase()) ) {
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/*
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* autofill in the complete box w/the first match
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* as long as the user hasn't entered in more data
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*/
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autoFill(data[0][0]);
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}
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else if (options.selectFirst) {
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/*
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* If the 'selectFirst' option was specified, then hilite the first element in the list.
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*/
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$('li:first', results).addClass('ac_over');
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}
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showResults();
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}
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else {
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hideResultsNow();
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}
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};
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function parseData(data) {
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if (!data) return null;
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var parsed = [];
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var rows = data.split(options.lineSeparator);
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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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parsed[parsed.length] = row.split(options.cellSeparator);
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}
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}
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return parsed;
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};
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/**
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* Create a new pop-up list element.
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*
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* @param data the data to use when constructing the element.
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*
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* @return a 'ul' dom element.
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*/
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function dataToDom(data) {
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var ul = document.createElement('ul');
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var num = data.length;
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// limited results to a max number
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if( (options.maxItemsToShow > 0) && (options.maxItemsToShow < num) ) num = options.maxItemsToShow;
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for (var i=0; i < num; i++) {
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var row = data[i];
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if (!row) continue;
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var li = document.createElement('li');
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if (options.formatItem) {
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li.innerHTML = options.formatItem(row, i, num);
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li.selectValue = row[0];
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}
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else {
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li.innerHTML = row[0];
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li.selectValue = row[0];
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}
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var extra = null;
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if (row.length > 1) {
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extra = [];
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for (var j=1; j < row.length; j++) {
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extra[extra.length] = row[j];
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}
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}
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li.extra = extra;
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ul.appendChild(li);
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$(li).hover(
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function() { $('li', ul).removeClass('ac_over'); $(this).addClass('ac_over'); active = $('li', ul).indexOf($(this).get(0)); },
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function() { $(this).removeClass('ac_over'); }
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).click(function(e) {
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e.preventDefault();
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e.stopPropagation();
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selectItem(this)
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});
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}
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$(ul).mousedown(function() {
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mouseDownOnSelect = true;
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}).mouseup(function() {
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mouseDownOnSelect = false;
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});
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return ul;
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};
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/*
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* Perform an ajax request for the specified query string
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*/
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function requestData(q) {
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if (!options.matchCase) {
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q = q.toLowerCase();
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}
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var data = options.cacheLength ? loadFromCache(q) : null;
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if (data) {
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/*
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* receive the cached data
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*/
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receiveData(q, data);
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}
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else if ((typeof options.url == 'string') && (options.url.length > 0)) {
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/*
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* if an AJAX url has been supplied, try loading the data now
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*
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* Increment the unique request ID, to ensure that we're only using the most recent request
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*/
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$requestId += 1;
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if ($requestId >= $MAX_REQUEST_ID) {
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$requestId = 0; // roll over
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}
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// Perform the request.
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var thisRequestId = $requestId;
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$.get(makeUrl(q), function(data) {
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handleReceivedData(q, data, thisRequestId);
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});
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}
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else {
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/*
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* if there's been no data found, remove the loading class
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*/
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$input.removeClass(options.loadingClass);
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}
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};
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function handleReceivedData(q, data, thisRequestId) {
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data = parseData(data);
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addToCache(q, data);
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if (thisRequestId == $requestId) {
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/*
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* If this is the most recent request, then put it into the list.
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*/
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receiveData(q, data);
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}
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};
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function makeUrl(q) {
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var sep = options.url.indexOf('?') == -1 ? '?' : '&';
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var url = options.url + sep + options.queryParam + '=' + encodeURI(q);
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for (var i in options.extraParams) {
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url += '&' + i + '=' + encodeURI(options.extraParams[i]);
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}
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return url;
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};
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function loadFromCache(q) {
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if (!q) {
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return null;
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}
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if (cache.data[q]) {
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return cache.data[q];
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}
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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 qs = q.substr(0, i);
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var c = cache.data[qs];
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if (c) {
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var csub = [];
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for (var j = 0; j < c.length; j++) {
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var x = c[j];
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var x0 = x[0];
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if (matchSubset(x0, 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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function matchSubset(s, sub) {
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if (!options.matchCase) {
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s = s.toLowerCase();
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}
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var i = s.indexOf(sub);
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if (i == -1) {
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return false;
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}
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return i == 0 || options.matchContains;
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};
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this.flushCache = function() {
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flushCache();
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};
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this.setExtraParams = function(p) {
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options.extraParams = p;
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};
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this.findValue = function(){
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var q = $input.val();
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if (!options.matchCase) {
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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(popupParent) {
|
|
var offset = popupParent.offset();
|
|
var maxZIndex = 0;
|
|
var zIndexParent = popupParent;
|
|
|
|
while (zIndexParent.length && !zIndexParent.is('body')) {
|
|
var thisZIndex = zIndexParent.css('z-index');
|
|
|
|
thisZIndex = parseInt(thisZIndex);
|
|
|
|
if (thisZIndex || !isNaN(thisZIndex)) {
|
|
maxZIndex = Math.max(thisZIndex, maxZIndex);
|
|
}
|
|
|
|
zIndexParent = zIndexParent.offsetParent();
|
|
}
|
|
|
|
return {
|
|
x: Math.ceil(offset.left),
|
|
y: Math.ceil(offset.top),
|
|
zIndex: maxZIndex + 10
|
|
};
|
|
}
|
|
}
|
|
|
|
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 = ((typeof data == 'object') && (data.constructor == Array)) ? data : null;
|
|
|
|
// Set default values for required options
|
|
options = $.extend({
|
|
autoFill: false,
|
|
cacheLength: 1,
|
|
cellSeparator: '|',
|
|
delay: 400,
|
|
extraParams: {},
|
|
focus: false,
|
|
inputClass: 'ac_input',
|
|
lineSeparator: '\n',
|
|
loadingClass: 'ac_loading',
|
|
matchCase: 0,
|
|
matchSubset: 1,
|
|
matchContains: 0,
|
|
maxItemsToShow: -1,
|
|
minChars: 1,
|
|
mustMatch: 0,
|
|
onResultsShow: null,
|
|
onResultsHide: null,
|
|
popupParent: null,
|
|
queryParam: 'q',
|
|
resultsClass: 'ac_results',
|
|
resultsId: null,
|
|
selectFirst: false,
|
|
selectOnly: false,
|
|
width: 0
|
|
}, options);
|
|
options.width = parseInt(options.width, 10);
|
|
|
|
if (options.popupParent) {
|
|
options.popupParent = $(options.popupParent);
|
|
|
|
if (options.popupParent.length == 0) {
|
|
options.popupParent = null;
|
|
}
|
|
}
|
|
|
|
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;
|
|
};
|