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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 = $("<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 $input.keydown(processKey); |
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41 |
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42 function resetPosition() { |
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43 // requires jquery.dimension plugin |
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44 var offset = $input.offset(); |
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45 $results.css({ |
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46 top: (offset.top + input.offsetHeight) + 'px', |
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47 left: offset.left + 'px' |
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48 }); |
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49 } |
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50 |
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51 |
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52 function processKey(e) { |
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53 |
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54 // handling up/down/escape requires results to be visible |
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55 // handling enter/tab requires that AND a result to be selected |
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56 if ((/27$|38$|40$/.test(e.keyCode) && $results.is(':visible')) || |
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57 (/^13$|^9$/.test(e.keyCode) && getCurrentResult())) { |
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58 |
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59 if (e.preventDefault) |
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60 e.preventDefault(); |
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61 if (e.stopPropagation) |
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62 e.stopPropagation(); |
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63 |
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64 e.cancelBubble = true; |
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65 e.returnValue = false; |
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66 |
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67 switch(e.keyCode) { |
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68 |
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69 case 38: // up |
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70 prevResult(); |
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71 break; |
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72 |
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73 case 40: // down |
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74 nextResult(); |
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75 break; |
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76 |
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77 case 9: // tab |
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78 case 13: // return |
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79 selectCurrentResult(); |
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80 break; |
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81 |
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82 case 27: // escape |
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83 $results.hide(); |
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84 break; |
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85 |
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86 } |
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87 |
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88 } else if ($input.val().length != prevLength) { |
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89 |
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90 if (timeout) |
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91 clearTimeout(timeout); |
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92 timeout = setTimeout(suggest, options.delay); |
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93 prevLength = $input.val().length; |
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94 |
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95 } |
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96 |
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97 |
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98 } |
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99 |
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100 |
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101 function suggest() { |
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102 |
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103 var q = $.trim($input.val()), multipleSepPos, items; |
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104 |
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105 if ( options.multiple ) { |
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106 multipleSepPos = q.lastIndexOf(options.multipleSep); |
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107 if ( multipleSepPos != -1 ) { |
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108 q = $.trim(q.substr(multipleSepPos + options.multipleSep.length)); |
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109 } |
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110 } |
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111 if (q.length >= options.minchars) { |
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112 |
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113 cached = checkCache(q); |
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114 |
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115 if (cached) { |
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116 |
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117 displayItems(cached['items']); |
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118 |
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119 } else { |
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120 |
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121 $.get(options.source, {q: q}, function(txt) { |
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122 |
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123 $results.hide(); |
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124 |
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125 items = parseTxt(txt, q); |
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126 |
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127 displayItems(items); |
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128 addToCache(q, items, txt.length); |
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129 |
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130 }); |
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131 |
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132 } |
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133 |
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134 } else { |
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135 |
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136 $results.hide(); |
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137 |
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138 } |
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139 |
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140 } |
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141 |
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142 |
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143 function checkCache(q) { |
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144 var i; |
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145 for (i = 0; i < cache.length; i++) |
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146 if (cache[i]['q'] == q) { |
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147 cache.unshift(cache.splice(i, 1)[0]); |
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148 return cache[0]; |
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149 } |
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150 |
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151 return false; |
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152 |
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153 } |
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154 |
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155 function addToCache(q, items, size) { |
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156 var cached; |
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157 while (cache.length && (cacheSize + size > options.maxCacheSize)) { |
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158 cached = cache.pop(); |
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159 cacheSize -= cached['size']; |
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160 } |
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161 |
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162 cache.push({ |
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163 q: q, |
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164 size: size, |
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165 items: items |
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166 }); |
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167 |
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168 cacheSize += size; |
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169 |
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170 } |
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171 |
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172 function displayItems(items) { |
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173 var html = '', i; |
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174 if (!items) |
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175 return; |
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176 |
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177 if (!items.length) { |
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178 $results.hide(); |
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179 return; |
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180 } |
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181 |
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182 resetPosition(); // when the form moves after the page has loaded |
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183 |
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184 for (i = 0; i < items.length; i++) |
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185 html += '<li>' + items[i] + '</li>'; |
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186 |
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187 $results.html(html).show(); |
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188 |
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189 $results |
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190 .children('li') |
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191 .mouseover(function() { |
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192 $results.children('li').removeClass(options.selectClass); |
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193 $(this).addClass(options.selectClass); |
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194 }) |
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195 .click(function(e) { |
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196 e.preventDefault(); |
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197 e.stopPropagation(); |
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198 selectCurrentResult(); |
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199 }); |
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200 |
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201 } |
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202 |
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203 function parseTxt(txt, q) { |
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204 |
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205 var items = [], tokens = txt.split(options.delimiter), i, token; |
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206 |
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207 // parse returned data for non-empty items |
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208 for (i = 0; i < tokens.length; i++) { |
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209 token = $.trim(tokens[i]); |
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210 if (token) { |
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211 token = token.replace( |
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212 new RegExp(q, 'ig'), |
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213 function(q) { return '<span class="' + options.matchClass + '">' + q + '</span>' } |
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214 ); |
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215 items[items.length] = token; |
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216 } |
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217 } |
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218 |
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219 return items; |
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220 } |
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221 |
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222 function getCurrentResult() { |
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223 var $currentResult; |
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224 if (!$results.is(':visible')) |
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225 return false; |
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226 |
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227 $currentResult = $results.children('li.' + options.selectClass); |
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228 |
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229 if (!$currentResult.length) |
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230 $currentResult = false; |
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231 |
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232 return $currentResult; |
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233 |
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234 } |
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235 |
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236 function selectCurrentResult() { |
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237 |
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238 $currentResult = getCurrentResult(); |
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239 |
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240 if ($currentResult) { |
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241 if ( options.multiple ) { |
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242 if ( $input.val().indexOf(options.multipleSep) != -1 ) { |
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243 $currentVal = $input.val().substr( 0, ( $input.val().lastIndexOf(options.multipleSep) + options.multipleSep.length ) ); |
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244 } else { |
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245 $currentVal = ""; |
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246 } |
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247 $input.val( $currentVal + $currentResult.text() + options.multipleSep); |
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248 $input.focus(); |
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249 } else { |
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250 $input.val($currentResult.text()); |
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251 } |
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252 $results.hide(); |
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253 |
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254 if (options.onSelect) |
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255 options.onSelect.apply($input[0]); |
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256 |
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257 } |
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258 |
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259 } |
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260 |
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261 function nextResult() { |
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262 |
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263 $currentResult = getCurrentResult(); |
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264 |
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265 if ($currentResult) |
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266 $currentResult |
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267 .removeClass(options.selectClass) |
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268 .next() |
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269 .addClass(options.selectClass); |
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270 else |
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271 $results.children('li:first-child').addClass(options.selectClass); |
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272 |
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273 } |
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274 |
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275 function prevResult() { |
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276 var $currentResult = getCurrentResult(); |
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277 |
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278 if ($currentResult) |
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279 $currentResult |
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280 .removeClass(options.selectClass) |
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281 .prev() |
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282 .addClass(options.selectClass); |
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283 else |
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284 $results.children('li:last-child').addClass(options.selectClass); |
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285 |
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286 } |
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287 } |
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288 |
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289 $.fn.suggest = function(source, options) { |
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290 |
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291 if (!source) |
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292 return; |
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293 |
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294 options = options || {}; |
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295 options.multiple = options.multiple || false; |
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296 options.multipleSep = options.multipleSep || ", "; |
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297 options.source = source; |
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298 options.delay = options.delay || 100; |
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299 options.resultsClass = options.resultsClass || 'ac_results'; |
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300 options.selectClass = options.selectClass || 'ac_over'; |
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301 options.matchClass = options.matchClass || 'ac_match'; |
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302 options.minchars = options.minchars || 2; |
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303 options.delimiter = options.delimiter || '\n'; |
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304 options.onSelect = options.onSelect || false; |
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305 options.maxCacheSize = options.maxCacheSize || 65536; |
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306 |
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307 this.each(function() { |
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308 new $.suggest(this, options); |
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309 }); |
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310 |
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311 return this; |
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312 |
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313 }; |
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314 |
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315 })(jQuery); |