1 /* |
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2 * searchtools.js_t |
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3 * ~~~~~~~~~~~~~~~~ |
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4 * |
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5 * Sphinx JavaScript utilities for the full-text search. |
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6 * |
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7 * :copyright: Copyright 2007-2016 by the Sphinx team, see AUTHORS. |
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8 * :license: BSD, see LICENSE for details. |
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9 * |
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10 */ |
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11 |
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12 |
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13 /* Non-minified version JS is _stemmer.js if file is provided */ |
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14 /** |
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15 * Porter Stemmer |
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16 */ |
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17 var Stemmer = function() { |
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18 |
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19 var step2list = { |
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20 ational: 'ate', |
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21 tional: 'tion', |
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22 enci: 'ence', |
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23 anci: 'ance', |
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24 izer: 'ize', |
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25 bli: 'ble', |
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26 alli: 'al', |
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27 entli: 'ent', |
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28 eli: 'e', |
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29 ousli: 'ous', |
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30 ization: 'ize', |
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31 ation: 'ate', |
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32 ator: 'ate', |
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33 alism: 'al', |
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34 iveness: 'ive', |
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35 fulness: 'ful', |
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36 ousness: 'ous', |
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37 aliti: 'al', |
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38 iviti: 'ive', |
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39 biliti: 'ble', |
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40 logi: 'log' |
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41 }; |
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42 |
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43 var step3list = { |
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44 icate: 'ic', |
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45 ative: '', |
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46 alize: 'al', |
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47 iciti: 'ic', |
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48 ical: 'ic', |
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49 ful: '', |
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50 ness: '' |
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51 }; |
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52 |
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53 var c = "[^aeiou]"; // consonant |
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54 var v = "[aeiouy]"; // vowel |
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55 var C = c + "[^aeiouy]*"; // consonant sequence |
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56 var V = v + "[aeiou]*"; // vowel sequence |
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57 |
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58 var mgr0 = "^(" + C + ")?" + V + C; // [C]VC... is m>0 |
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59 var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$"; // [C]VC[V] is m=1 |
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60 var mgr1 = "^(" + C + ")?" + V + C + V + C; // [C]VCVC... is m>1 |
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61 var s_v = "^(" + C + ")?" + v; // vowel in stem |
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62 |
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63 this.stemWord = function (w) { |
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64 var stem; |
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65 var suffix; |
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66 var firstch; |
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67 var origword = w; |
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68 |
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69 if (w.length < 3) |
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70 return w; |
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71 |
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72 var re; |
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73 var re2; |
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74 var re3; |
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75 var re4; |
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76 |
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77 firstch = w.substr(0,1); |
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78 if (firstch == "y") |
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79 w = firstch.toUpperCase() + w.substr(1); |
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80 |
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81 // Step 1a |
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82 re = /^(.+?)(ss|i)es$/; |
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83 re2 = /^(.+?)([^s])s$/; |
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84 |
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85 if (re.test(w)) |
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86 w = w.replace(re,"$1$2"); |
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87 else if (re2.test(w)) |
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88 w = w.replace(re2,"$1$2"); |
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89 |
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90 // Step 1b |
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91 re = /^(.+?)eed$/; |
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92 re2 = /^(.+?)(ed|ing)$/; |
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93 if (re.test(w)) { |
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94 var fp = re.exec(w); |
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95 re = new RegExp(mgr0); |
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96 if (re.test(fp[1])) { |
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97 re = /.$/; |
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98 w = w.replace(re,""); |
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99 } |
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100 } |
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101 else if (re2.test(w)) { |
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102 var fp = re2.exec(w); |
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103 stem = fp[1]; |
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104 re2 = new RegExp(s_v); |
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105 if (re2.test(stem)) { |
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106 w = stem; |
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107 re2 = /(at|bl|iz)$/; |
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108 re3 = new RegExp("([^aeiouylsz])\\1$"); |
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109 re4 = new RegExp("^" + C + v + "[^aeiouwxy]$"); |
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110 if (re2.test(w)) |
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111 w = w + "e"; |
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112 else if (re3.test(w)) { |
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113 re = /.$/; |
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114 w = w.replace(re,""); |
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115 } |
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116 else if (re4.test(w)) |
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117 w = w + "e"; |
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118 } |
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119 } |
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120 |
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121 // Step 1c |
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122 re = /^(.+?)y$/; |
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123 if (re.test(w)) { |
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124 var fp = re.exec(w); |
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125 stem = fp[1]; |
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126 re = new RegExp(s_v); |
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127 if (re.test(stem)) |
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128 w = stem + "i"; |
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129 } |
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130 |
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131 // Step 2 |
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132 re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/; |
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133 if (re.test(w)) { |
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134 var fp = re.exec(w); |
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135 stem = fp[1]; |
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136 suffix = fp[2]; |
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137 re = new RegExp(mgr0); |
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138 if (re.test(stem)) |
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139 w = stem + step2list[suffix]; |
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140 } |
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141 |
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142 // Step 3 |
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143 re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/; |
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144 if (re.test(w)) { |
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145 var fp = re.exec(w); |
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146 stem = fp[1]; |
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147 suffix = fp[2]; |
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148 re = new RegExp(mgr0); |
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149 if (re.test(stem)) |
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150 w = stem + step3list[suffix]; |
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151 } |
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152 |
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153 // Step 4 |
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154 re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/; |
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155 re2 = /^(.+?)(s|t)(ion)$/; |
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156 if (re.test(w)) { |
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157 var fp = re.exec(w); |
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158 stem = fp[1]; |
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159 re = new RegExp(mgr1); |
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160 if (re.test(stem)) |
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161 w = stem; |
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162 } |
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163 else if (re2.test(w)) { |
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164 var fp = re2.exec(w); |
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165 stem = fp[1] + fp[2]; |
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166 re2 = new RegExp(mgr1); |
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167 if (re2.test(stem)) |
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168 w = stem; |
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169 } |
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170 |
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171 // Step 5 |
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172 re = /^(.+?)e$/; |
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173 if (re.test(w)) { |
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174 var fp = re.exec(w); |
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175 stem = fp[1]; |
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176 re = new RegExp(mgr1); |
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177 re2 = new RegExp(meq1); |
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178 re3 = new RegExp("^" + C + v + "[^aeiouwxy]$"); |
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179 if (re.test(stem) || (re2.test(stem) && !(re3.test(stem)))) |
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180 w = stem; |
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181 } |
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182 re = /ll$/; |
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183 re2 = new RegExp(mgr1); |
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184 if (re.test(w) && re2.test(w)) { |
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185 re = /.$/; |
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186 w = w.replace(re,""); |
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187 } |
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188 |
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189 // and turn initial Y back to y |
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190 if (firstch == "y") |
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191 w = firstch.toLowerCase() + w.substr(1); |
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192 return w; |
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193 } |
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194 } |
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195 |
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196 |
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197 |
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198 /** |
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199 * Simple result scoring code. |
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200 */ |
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201 var Scorer = { |
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202 // Implement the following function to further tweak the score for each result |
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203 // The function takes a result array [filename, title, anchor, descr, score] |
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204 // and returns the new score. |
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205 /* |
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206 score: function(result) { |
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207 return result[4]; |
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208 }, |
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209 */ |
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210 |
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211 // query matches the full name of an object |
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212 objNameMatch: 11, |
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213 // or matches in the last dotted part of the object name |
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214 objPartialMatch: 6, |
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215 // Additive scores depending on the priority of the object |
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216 objPrio: {0: 15, // used to be importantResults |
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217 1: 5, // used to be objectResults |
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218 2: -5}, // used to be unimportantResults |
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219 // Used when the priority is not in the mapping. |
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220 objPrioDefault: 0, |
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221 |
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222 // query found in title |
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223 title: 15, |
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224 // query found in terms |
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225 term: 5 |
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226 }; |
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227 |
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228 |
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229 /** |
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230 * Search Module |
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231 */ |
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232 var Search = { |
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233 |
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234 _index : null, |
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235 _queued_query : null, |
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236 _pulse_status : -1, |
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237 |
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238 init : function() { |
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239 var params = $.getQueryParameters(); |
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240 if (params.q) { |
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241 var query = params.q[0]; |
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242 $('input[name="q"]')[0].value = query; |
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243 this.performSearch(query); |
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244 } |
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245 }, |
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246 |
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247 loadIndex : function(url) { |
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248 $.ajax({type: "GET", url: url, data: null, |
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249 dataType: "script", cache: true, |
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250 complete: function(jqxhr, textstatus) { |
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251 if (textstatus != "success") { |
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252 document.getElementById("searchindexloader").src = url; |
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253 } |
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254 }}); |
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255 }, |
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256 |
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257 setIndex : function(index) { |
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258 var q; |
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259 this._index = index; |
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260 if ((q = this._queued_query) !== null) { |
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261 this._queued_query = null; |
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262 Search.query(q); |
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263 } |
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264 }, |
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265 |
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266 hasIndex : function() { |
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267 return this._index !== null; |
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268 }, |
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269 |
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270 deferQuery : function(query) { |
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271 this._queued_query = query; |
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272 }, |
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273 |
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274 stopPulse : function() { |
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275 this._pulse_status = 0; |
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276 }, |
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277 |
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278 startPulse : function() { |
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279 if (this._pulse_status >= 0) |
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280 return; |
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281 function pulse() { |
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282 var i; |
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283 Search._pulse_status = (Search._pulse_status + 1) % 4; |
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284 var dotString = ''; |
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285 for (i = 0; i < Search._pulse_status; i++) |
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286 dotString += '.'; |
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287 Search.dots.text(dotString); |
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288 if (Search._pulse_status > -1) |
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289 window.setTimeout(pulse, 500); |
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290 } |
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291 pulse(); |
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292 }, |
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293 |
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294 /** |
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295 * perform a search for something (or wait until index is loaded) |
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296 */ |
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297 performSearch : function(query) { |
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298 // create the required interface elements |
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299 this.out = $('#search-results'); |
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300 this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out); |
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301 this.dots = $('<span></span>').appendTo(this.title); |
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302 this.status = $('<p style="display: none"></p>').appendTo(this.out); |
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303 this.output = $('<ul class="search"/>').appendTo(this.out); |
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304 |
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305 $('#search-progress').text(_('Preparing search...')); |
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306 this.startPulse(); |
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307 |
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308 // index already loaded, the browser was quick! |
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309 if (this.hasIndex()) |
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310 this.query(query); |
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311 else |
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312 this.deferQuery(query); |
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313 }, |
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314 |
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315 /** |
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316 * execute search (requires search index to be loaded) |
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317 */ |
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318 query : function(query) { |
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319 var i; |
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320 var stopwords = ["a","and","are","as","at","be","but","by","for","if","in","into","is","it","near","no","not","of","on","or","such","that","the","their","then","there","these","they","this","to","was","will","with"]; |
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321 |
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322 // stem the searchterms and add them to the correct list |
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323 var stemmer = new Stemmer(); |
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324 var searchterms = []; |
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325 var excluded = []; |
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326 var hlterms = []; |
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327 var tmp = query.split(/\W+/); |
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328 var objectterms = []; |
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329 for (i = 0; i < tmp.length; i++) { |
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330 if (tmp[i] !== "") { |
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331 objectterms.push(tmp[i].toLowerCase()); |
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332 } |
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333 |
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334 if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) || |
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335 tmp[i] === "") { |
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336 // skip this "word" |
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337 continue; |
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338 } |
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339 // stem the word |
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340 var word = stemmer.stemWord(tmp[i].toLowerCase()); |
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341 var toAppend; |
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342 // select the correct list |
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343 if (word[0] == '-') { |
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344 toAppend = excluded; |
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345 word = word.substr(1); |
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346 } |
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347 else { |
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348 toAppend = searchterms; |
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349 hlterms.push(tmp[i].toLowerCase()); |
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350 } |
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351 // only add if not already in the list |
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352 if (!$u.contains(toAppend, word)) |
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353 toAppend.push(word); |
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354 } |
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355 var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" ")); |
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356 |
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357 // console.debug('SEARCH: searching for:'); |
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358 // console.info('required: ', searchterms); |
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359 // console.info('excluded: ', excluded); |
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360 |
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361 // prepare search |
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362 var terms = this._index.terms; |
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363 var titleterms = this._index.titleterms; |
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364 |
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365 // array of [filename, title, anchor, descr, score] |
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366 var results = []; |
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367 $('#search-progress').empty(); |
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368 |
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369 // lookup as object |
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370 for (i = 0; i < objectterms.length; i++) { |
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371 var others = [].concat(objectterms.slice(0, i), |
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372 objectterms.slice(i+1, objectterms.length)); |
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373 results = results.concat(this.performObjectSearch(objectterms[i], others)); |
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374 } |
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375 |
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376 // lookup as search terms in fulltext |
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377 results = results.concat(this.performTermsSearch(searchterms, excluded, terms, titleterms)); |
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378 |
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379 // let the scorer override scores with a custom scoring function |
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380 if (Scorer.score) { |
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381 for (i = 0; i < results.length; i++) |
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382 results[i][4] = Scorer.score(results[i]); |
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383 } |
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384 |
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385 // now sort the results by score (in opposite order of appearance, since the |
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386 // display function below uses pop() to retrieve items) and then |
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387 // alphabetically |
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388 results.sort(function(a, b) { |
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389 var left = a[4]; |
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390 var right = b[4]; |
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391 if (left > right) { |
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392 return 1; |
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393 } else if (left < right) { |
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394 return -1; |
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395 } else { |
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396 // same score: sort alphabetically |
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397 left = a[1].toLowerCase(); |
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398 right = b[1].toLowerCase(); |
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399 return (left > right) ? -1 : ((left < right) ? 1 : 0); |
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400 } |
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401 }); |
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402 |
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403 // for debugging |
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404 //Search.lastresults = results.slice(); // a copy |
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405 //console.info('search results:', Search.lastresults); |
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406 |
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407 // print the results |
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408 var resultCount = results.length; |
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409 function displayNextItem() { |
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410 // results left, load the summary and display it |
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411 if (results.length) { |
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412 var item = results.pop(); |
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413 var listItem = $('<li style="display:none"></li>'); |
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414 if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') { |
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415 // dirhtml builder |
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416 var dirname = item[0] + '/'; |
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417 if (dirname.match(/\/index\/$/)) { |
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418 dirname = dirname.substring(0, dirname.length-6); |
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419 } else if (dirname == 'index/') { |
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420 dirname = ''; |
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421 } |
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422 listItem.append($('<a/>').attr('href', |
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423 DOCUMENTATION_OPTIONS.URL_ROOT + dirname + |
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424 highlightstring + item[2]).html(item[1])); |
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425 } else { |
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426 // normal html builders |
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427 listItem.append($('<a/>').attr('href', |
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428 item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX + |
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429 highlightstring + item[2]).html(item[1])); |
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430 } |
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431 if (item[3]) { |
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432 listItem.append($('<span> (' + item[3] + ')</span>')); |
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433 Search.output.append(listItem); |
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434 listItem.slideDown(5, function() { |
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435 displayNextItem(); |
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436 }); |
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437 } else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) { |
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438 $.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + '_sources/' + item[0] + '.txt', |
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439 dataType: "text", |
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440 complete: function(jqxhr, textstatus) { |
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441 var data = jqxhr.responseText; |
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442 if (data !== '' && data !== undefined) { |
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443 listItem.append(Search.makeSearchSummary(data, searchterms, hlterms)); |
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444 } |
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445 Search.output.append(listItem); |
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446 listItem.slideDown(5, function() { |
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447 displayNextItem(); |
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448 }); |
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449 }}); |
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450 } else { |
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451 // no source available, just display title |
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452 Search.output.append(listItem); |
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453 listItem.slideDown(5, function() { |
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454 displayNextItem(); |
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455 }); |
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456 } |
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457 } |
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458 // search finished, update title and status message |
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459 else { |
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460 Search.stopPulse(); |
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461 Search.title.text(_('Search Results')); |
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462 if (!resultCount) |
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463 Search.status.text(_('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.')); |
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464 else |
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465 Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount)); |
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466 Search.status.fadeIn(500); |
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467 } |
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468 } |
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469 displayNextItem(); |
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470 }, |
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471 |
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472 /** |
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473 * search for object names |
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474 */ |
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475 performObjectSearch : function(object, otherterms) { |
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476 var filenames = this._index.filenames; |
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477 var objects = this._index.objects; |
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478 var objnames = this._index.objnames; |
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479 var titles = this._index.titles; |
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480 |
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481 var i; |
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482 var results = []; |
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483 |
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484 for (var prefix in objects) { |
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485 for (var name in objects[prefix]) { |
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486 var fullname = (prefix ? prefix + '.' : '') + name; |
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487 if (fullname.toLowerCase().indexOf(object) > -1) { |
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488 var score = 0; |
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489 var parts = fullname.split('.'); |
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490 // check for different match types: exact matches of full name or |
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491 // "last name" (i.e. last dotted part) |
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492 if (fullname == object || parts[parts.length - 1] == object) { |
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493 score += Scorer.objNameMatch; |
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494 // matches in last name |
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495 } else if (parts[parts.length - 1].indexOf(object) > -1) { |
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496 score += Scorer.objPartialMatch; |
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497 } |
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498 var match = objects[prefix][name]; |
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499 var objname = objnames[match[1]][2]; |
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500 var title = titles[match[0]]; |
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501 // If more than one term searched for, we require other words to be |
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502 // found in the name/title/description |
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503 if (otherterms.length > 0) { |
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504 var haystack = (prefix + ' ' + name + ' ' + |
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505 objname + ' ' + title).toLowerCase(); |
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506 var allfound = true; |
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507 for (i = 0; i < otherterms.length; i++) { |
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508 if (haystack.indexOf(otherterms[i]) == -1) { |
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509 allfound = false; |
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510 break; |
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511 } |
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512 } |
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513 if (!allfound) { |
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514 continue; |
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515 } |
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516 } |
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517 var descr = objname + _(', in ') + title; |
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518 |
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519 var anchor = match[3]; |
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520 if (anchor === '') |
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521 anchor = fullname; |
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522 else if (anchor == '-') |
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523 anchor = objnames[match[1]][1] + '-' + fullname; |
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524 // add custom score for some objects according to scorer |
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525 if (Scorer.objPrio.hasOwnProperty(match[2])) { |
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526 score += Scorer.objPrio[match[2]]; |
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527 } else { |
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528 score += Scorer.objPrioDefault; |
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529 } |
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530 results.push([filenames[match[0]], fullname, '#'+anchor, descr, score]); |
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531 } |
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532 } |
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533 } |
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534 |
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535 return results; |
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536 }, |
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537 |
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538 /** |
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539 * search for full-text terms in the index |
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540 */ |
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541 performTermsSearch : function(searchterms, excluded, terms, titleterms) { |
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542 var filenames = this._index.filenames; |
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543 var titles = this._index.titles; |
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544 |
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545 var i, j, file; |
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546 var fileMap = {}; |
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547 var scoreMap = {}; |
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548 var results = []; |
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549 |
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550 // perform the search on the required terms |
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551 for (i = 0; i < searchterms.length; i++) { |
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552 var word = searchterms[i]; |
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553 var files = []; |
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554 var _o = [ |
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555 {files: terms[word], score: Scorer.term}, |
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556 {files: titleterms[word], score: Scorer.title} |
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557 ]; |
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558 |
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559 // no match but word was a required one |
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560 if ($u.every(_o, function(o){return o.files === undefined;})) { |
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561 break; |
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562 } |
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563 // found search word in contents |
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564 $u.each(_o, function(o) { |
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565 var _files = o.files; |
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566 if (_files === undefined) |
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567 return |
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568 |
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569 if (_files.length === undefined) |
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570 _files = [_files]; |
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571 files = files.concat(_files); |
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572 |
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573 // set score for the word in each file to Scorer.term |
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574 for (j = 0; j < _files.length; j++) { |
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575 file = _files[j]; |
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576 if (!(file in scoreMap)) |
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577 scoreMap[file] = {} |
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578 scoreMap[file][word] = o.score; |
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579 } |
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580 }); |
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581 |
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582 // create the mapping |
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583 for (j = 0; j < files.length; j++) { |
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584 file = files[j]; |
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585 if (file in fileMap) |
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586 fileMap[file].push(word); |
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587 else |
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588 fileMap[file] = [word]; |
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589 } |
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590 } |
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591 |
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592 // now check if the files don't contain excluded terms |
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593 for (file in fileMap) { |
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594 var valid = true; |
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595 |
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596 // check if all requirements are matched |
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597 if (fileMap[file].length != searchterms.length) |
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598 continue; |
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599 |
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600 // ensure that none of the excluded terms is in the search result |
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601 for (i = 0; i < excluded.length; i++) { |
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602 if (terms[excluded[i]] == file || |
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603 titleterms[excluded[i]] == file || |
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604 $u.contains(terms[excluded[i]] || [], file) || |
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605 $u.contains(titleterms[excluded[i]] || [], file)) { |
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606 valid = false; |
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607 break; |
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608 } |
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609 } |
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610 |
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611 // if we have still a valid result we can add it to the result list |
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612 if (valid) { |
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613 // select one (max) score for the file. |
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614 // for better ranking, we should calculate ranking by using words statistics like basic tf-idf... |
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615 var score = $u.max($u.map(fileMap[file], function(w){return scoreMap[file][w]})); |
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616 results.push([filenames[file], titles[file], '', null, score]); |
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617 } |
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618 } |
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619 return results; |
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620 }, |
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621 |
|
622 /** |
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623 * helper function to return a node containing the |
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624 * search summary for a given text. keywords is a list |
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625 * of stemmed words, hlwords is the list of normal, unstemmed |
|
626 * words. the first one is used to find the occurrence, the |
|
627 * latter for highlighting it. |
|
628 */ |
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629 makeSearchSummary : function(text, keywords, hlwords) { |
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630 var textLower = text.toLowerCase(); |
|
631 var start = 0; |
|
632 $.each(keywords, function() { |
|
633 var i = textLower.indexOf(this.toLowerCase()); |
|
634 if (i > -1) |
|
635 start = i; |
|
636 }); |
|
637 start = Math.max(start - 120, 0); |
|
638 var excerpt = ((start > 0) ? '...' : '') + |
|
639 $.trim(text.substr(start, 240)) + |
|
640 ((start + 240 - text.length) ? '...' : ''); |
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641 var rv = $('<div class="context"></div>').text(excerpt); |
|
642 $.each(hlwords, function() { |
|
643 rv = rv.highlightText(this, 'highlighted'); |
|
644 }); |
|
645 return rv; |
|
646 } |
|
647 }; |
|
648 |
|
649 $(document).ready(function() { |
|
650 Search.init(); |
|
651 }); |
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