1 | /*
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2 | * jquery.suggest 1.1b - 2007-08-06
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3 | * Patched by Mark Jaquith with Alexander Dick's "multiple items" patch to allow for auto-suggesting of more than one tag before submitting
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4 | * See: http://www.vulgarisoip.com/2007/06/29/jquerysuggest-an-alternative-jquery-based-autocomplete-library/#comment-7228
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5 | *
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6 | * Uses code and techniques from following libraries:
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7 | * 1. http://www.dyve.net/jquery/?autocomplete
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8 | * 2. http://dev.jquery.com/browser/trunk/plugins/interface/iautocompleter.js
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9 | *
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10 | * All the new stuff written by Peter Vulgaris (www.vulgarisoip.com)
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11 | * Feel free to do whatever you want with this file
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12 | *
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13 | */
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14 |
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15 | (function($) {
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16 |
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17 | $.suggest = function(input, options) {
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18 | var $input, $results, timeout, prevLength, cache, cacheSize;
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19 |
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20 | $input = $(input).attr("autocomplete", "off");
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21 | $results = $(document.createElement("ul"));
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22 |
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23 | timeout = false; // hold timeout ID for suggestion results to appear
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24 | prevLength = 0; // last recorded length of $input.val()
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25 | cache = []; // cache MRU list
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26 | cacheSize = 0; // size of cache in chars (bytes?)
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27 |
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28 | $results.addClass(options.resultsClass).appendTo('body');
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29 |
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30 |
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31 | resetPosition();
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32 | $(window)
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33 | .load(resetPosition) // just in case user is changing size of page while loading
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34 | .resize(resetPosition);
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35 |
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36 | $input.blur(function() {
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37 | setTimeout(function() { $results.hide() }, 200);
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38 | });
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39 |
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40 |
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41 | // help IE users if possible
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42 | if ( $.browser.msie ) {
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43 | try {
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44 | $results.bgiframe();
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45 | } catch(e) { }
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46 | }
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47 |
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48 | // I really hate browser detection, but I don't see any other way
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49 | if ($.browser.mozilla)
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50 | $input.keypress(processKey); // onkeypress repeats arrow keys in Mozilla/Opera
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51 | else
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52 | $input.keydown(processKey); // onkeydown repeats arrow keys in IE/Safari
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53 |
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54 |
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55 |
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56 |
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57 | function resetPosition() {
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58 | // requires jquery.dimension plugin
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59 | var offset = $input.offset();
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60 | $results.css({
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61 | top: (offset.top + input.offsetHeight) + 'px',
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62 | left: offset.left + 'px'
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63 | });
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64 | }
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65 |
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66 |
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67 | function processKey(e) {
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68 |
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69 | // handling up/down/escape requires results to be visible
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70 | // handling enter/tab requires that AND a result to be selected
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71 | if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) ||
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72 | (/^13$|^9$/.test(e.keyCode) && getCurrentResult())) {
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73 |
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74 | if (e.preventDefault)
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75 | e.preventDefault();
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76 | if (e.stopPropagation)
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77 | e.stopPropagation();
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78 |
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79 | e.cancelBubble = true;
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80 | e.returnValue = false;
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81 |
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82 | switch(e.keyCode) {
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83 |
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84 | case 38: // up
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85 | prevResult();
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86 | break;
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87 |
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88 | case 40: // down
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89 | nextResult();
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90 | break;
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91 |
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92 | case 9: // tab
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93 | case 13: // return
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94 | selectCurrentResult();
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95 | break;
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96 |
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97 | case 27: // escape
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98 | $results.hide();
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99 | break;
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100 |
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101 | }
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102 |
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103 | } else if ($input.val().length != prevLength) {
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104 |
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105 | if (timeout)
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106 | clearTimeout(timeout);
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107 | timeout = setTimeout(suggest, options.delay);
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108 | prevLength = $input.val().length;
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109 |
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110 | }
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111 |
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112 |
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113 | }
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114 |
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115 |
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116 | function suggest() {
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117 |
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118 | var q = $.trim($input.val()), multipleSepPos, items;
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119 |
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120 | if ( options.multiple ) {
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121 | multipleSepPos = q.lastIndexOf(options.multipleSep);
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122 | if ( multipleSepPos != -1 ) {
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123 | q = q.substr(multipleSepPos + options.multipleSep.length);
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124 | }
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125 | }
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126 | if (q.length >= options.minchars) {
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127 |
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128 | cached = checkCache(q);
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129 |
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130 | if (cached) {
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131 |
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132 | displayItems(cached['items']);
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133 |
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134 | } else {
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135 |
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136 | $.get(options.source, {q: q}, function(txt) {
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137 |
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138 | $results.hide();
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139 |
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140 | items = parseTxt(txt, q);
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141 |
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142 | displayItems(items);
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143 | addToCache(q, items, txt.length);
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144 |
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145 | });
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146 |
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147 | }
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148 |
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149 | } else {
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150 |
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151 | $results.hide();
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152 |
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153 | }
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154 |
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155 | }
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156 |
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157 |
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158 | function checkCache(q) {
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159 | var i;
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160 | for (i = 0; i < cache.length; i++)
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161 | if (cache[i]['q'] == q) {
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162 | cache.unshift(cache.splice(i, 1)[0]);
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163 | return cache[0];
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164 | }
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165 |
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166 | return false;
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167 |
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168 | }
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169 |
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170 | function addToCache(q, items, size) {
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171 | var cached;
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172 | while (cache.length && (cacheSize + size > options.maxCacheSize)) {
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173 | cached = cache.pop();
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174 | cacheSize -= cached['size'];
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175 | }
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176 |
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177 | cache.push({
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178 | q: q,
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179 | size: size,
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180 | items: items
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181 | });
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182 |
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183 | cacheSize += size;
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184 |
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185 | }
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186 |
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187 | function displayItems(items) {
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188 | var html = '', i;
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189 | if (!items)
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190 | return;
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191 |
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192 | if (!items.length) {
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193 | $results.hide();
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194 | return;
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195 | }
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196 |
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197 | resetPosition(); // when the form moves after the page has loaded
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198 |
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199 | for (i = 0; i < items.length; i++)
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200 | html += '<li>' + items[i] + '</li>';
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201 |
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202 | $results.html(html).show();
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203 |
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204 | $results
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205 | .children('li')
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206 | .mouseover(function() {
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207 | $results.children('li').removeClass(options.selectClass);
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208 | $(this).addClass(options.selectClass);
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209 | })
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210 | .click(function(e) {
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211 | e.preventDefault();
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212 | e.stopPropagation();
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213 | selectCurrentResult();
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214 | });
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215 |
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216 | }
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217 |
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218 | function parseTxt(txt, q) {
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219 |
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220 | var items = [], tokens = txt.split(options.delimiter), i, token;
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221 |
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222 | // parse returned data for non-empty items
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223 | for (i = 0; i < tokens.length; i++) {
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224 | token = $.trim(tokens[i]);
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225 | if (token) {
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226 | token = token.replace(
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227 | new RegExp(q, 'ig'),
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228 | function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' }
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229 | );
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230 | items[items.length] = token;
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231 | }
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232 | }
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233 |
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234 | return items;
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235 | }
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236 |
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237 | function getCurrentResult() {
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238 | var $currentResult;
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239 | if (!$results.is(':visible'))
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240 | return false;
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241 |
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242 | $currentResult = $results.children('li.' + options.selectClass);
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243 |
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244 | if (!$currentResult.length)
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245 | $currentResult = false;
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246 |
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247 | return $currentResult;
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248 |
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249 | }
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250 |
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251 | function selectCurrentResult() {
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252 |
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253 | $currentResult = getCurrentResult();
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254 |
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255 | if ($currentResult) {
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256 | if ( options.multiple ) {
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257 | if ( $input.val().indexOf(options.multipleSep) != -1 ) {
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258 | $currentVal = $input.val().substr( 0, ( $input.val().lastIndexOf(options.multipleSep) + options.multipleSep.length ) );
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259 | } else {
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260 | $currentVal = "";
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261 | }
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262 | $input.val( $currentVal + $currentResult.text() + options.multipleSep);
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263 | $input.focus();
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264 | } else {
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265 | $input.val($currentResult.text());
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266 | }
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267 | $results.hide();
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268 |
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269 | if (options.onSelect)
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270 | options.onSelect.apply($input[0]);
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271 |
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272 | }
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273 |
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274 | }
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275 |
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276 | function nextResult() {
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277 |
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278 | $currentResult = getCurrentResult();
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279 |
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280 | if ($currentResult)
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281 | $currentResult
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282 | .removeClass(options.selectClass)
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283 | .next()
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284 | .addClass(options.selectClass);
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285 | else
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286 | $results.children('li:first-child').addClass(options.selectClass);
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287 |
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288 | }
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289 |
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290 | function prevResult() {
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291 | var $currentResult = getCurrentResult();
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292 |
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293 | if ($currentResult)
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294 | $currentResult
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295 | .removeClass(options.selectClass)
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296 | .prev()
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297 | .addClass(options.selectClass);
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298 | else
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299 | $results.children('li:last-child').addClass(options.selectClass);
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300 |
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301 | }
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302 | }
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303 |
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304 | $.fn.suggest = function(source, options) {
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305 |
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306 | if (!source)
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307 | return;
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308 |
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309 | options = options || {};
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310 | options.multiple = options.multiple || false;
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311 | options.multipleSep = options.multipleSep || ", ";
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312 | options.source = source;
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313 | options.delay = options.delay || 100;
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314 | options.resultsClass = options.resultsClass || 'ac_results';
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315 | options.selectClass = options.selectClass || 'ac_over';
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316 | options.matchClass = options.matchClass || 'ac_match';
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317 | options.minchars = options.minchars || 2;
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318 | options.delimiter = options.delimiter || '\n';
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319 | options.onSelect = options.onSelect || false;
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320 | options.maxCacheSize = options.maxCacheSize || 65536;
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321 |
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322 | this.each(function() {
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323 | new $.suggest(this, options);
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324 | });
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325 |
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326 | return this;
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327 |
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328 | };
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329 |
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330 | })(jQuery);
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