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 utilties for the full-text search. |
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6 | * |
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7 | * :copyright: Copyright 2007-2015 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 | /** |
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14 | * Porter Stemmer |
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15 | */ |
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16 | var Stemmer = function() { |
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17 | |
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18 | var step2list = { |
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19 | ational: 'ate', |
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20 | tional: 'tion', |
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21 | enci: 'ence', |
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22 | anci: 'ance', |
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23 | izer: 'ize', |
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24 | bli: 'ble', |
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25 | alli: 'al', |
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26 | entli: 'ent', |
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27 | eli: 'e', |
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28 | ousli: 'ous', |
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29 | ization: 'ize', |
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30 | ation: 'ate', |
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31 | ator: 'ate', |
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32 | alism: 'al', |
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33 | iveness: 'ive', |
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34 | fulness: 'ful', |
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35 | ousness: 'ous', |
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36 | aliti: 'al', |
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37 | iviti: 'ive', |
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38 | biliti: 'ble', |
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39 | logi: 'log' |
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40 | }; |
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41 | |
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42 | var step3list = { |
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43 | icate: 'ic', |
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44 | ative: '', |
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45 | alize: 'al', |
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46 | iciti: 'ic', |
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47 | ical: 'ic', |
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48 | ful: '', |
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49 | ness: '' |
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50 | }; |
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51 | |
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52 | var c = "[^aeiou]"; // consonant |
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53 | var v = "[aeiouy]"; // vowel |
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54 | var C = c + "[^aeiouy]*"; // consonant sequence |
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55 | var V = v + "[aeiou]*"; // vowel sequence |
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56 | |
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57 | var mgr0 = "^(" + C + ")?" + V + C; // [C]VC... is m>0 |
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58 | var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$"; // [C]VC[V] is m=1 |
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59 | var mgr1 = "^(" + C + ")?" + V + C + V + C; // [C]VCVC... is m>1 |
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60 | var s_v = "^(" + C + ")?" + v; // vowel in stem |
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61 | |
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62 | this.stemWord = function (w) { |
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63 | var stem; |
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64 | var suffix; |
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65 | var firstch; |
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66 | var origword = w; |
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67 | |
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68 | if (w.length < 3) |
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69 | return w; |
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70 | |
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71 | var re; |
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72 | var re2; |
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73 | var re3; |
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74 | var re4; |
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75 | |
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76 | firstch = w.substr(0,1); |
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77 | if (firstch == "y") |
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78 | w = firstch.toUpperCase() + w.substr(1); |
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79 | |
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80 | // Step 1a |
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81 | re = /^(.+?)(ss|i)es$/; |
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82 | re2 = /^(.+?)([^s])s$/; |
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83 | |
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84 | if (re.test(w)) |
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85 | w = w.replace(re,"$1$2"); |
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86 | else if (re2.test(w)) |
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87 | w = w.replace(re2,"$1$2"); |
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88 | |
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89 | // Step 1b |
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90 | re = /^(.+?)eed$/; |
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91 | re2 = /^(.+?)(ed|ing)$/; |
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92 | if (re.test(w)) { |
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93 | var fp = re.exec(w); |
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94 | re = new RegExp(mgr0); |
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95 | if (re.test(fp[1])) { |
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96 | re = /.$/; |
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97 | w = w.replace(re,""); |
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98 | } |
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99 | } |
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100 | else if (re2.test(w)) { |
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101 | var fp = re2.exec(w); |
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102 | stem = fp[1]; |
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103 | re2 = new RegExp(s_v); |
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104 | if (re2.test(stem)) { |
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105 | w = stem; |
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106 | re2 = /(at|bl|iz)$/; |
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107 | re3 = new RegExp("([^aeiouylsz])\\1$"); |
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108 | re4 = new RegExp("^" + C + v + "[^aeiouwxy]$"); |
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109 | if (re2.test(w)) |
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110 | w = w + "e"; |
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111 | else if (re3.test(w)) { |
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112 | re = /.$/; |
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113 | w = w.replace(re,""); |
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114 | } |
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115 | else if (re4.test(w)) |
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116 | w = w + "e"; |
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117 | } |
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118 | } |
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119 | |
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120 | // Step 1c |
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121 | re = /^(.+?)y$/; |
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122 | if (re.test(w)) { |
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123 | var fp = re.exec(w); |
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124 | stem = fp[1]; |
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125 | re = new RegExp(s_v); |
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126 | if (re.test(stem)) |
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127 | w = stem + "i"; |
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128 | } |
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129 | |
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130 | // Step 2 |
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131 | re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/; |
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132 | if (re.test(w)) { |
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133 | var fp = re.exec(w); |
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134 | stem = fp[1]; |
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135 | suffix = fp[2]; |
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136 | re = new RegExp(mgr0); |
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137 | if (re.test(stem)) |
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138 | w = stem + step2list[suffix]; |
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139 | } |
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140 | |
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141 | // Step 3 |
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142 | re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/; |
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143 | if (re.test(w)) { |
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144 | var fp = re.exec(w); |
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145 | stem = fp[1]; |
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146 | suffix = fp[2]; |
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147 | re = new RegExp(mgr0); |
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148 | if (re.test(stem)) |
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149 | w = stem + step3list[suffix]; |
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150 | } |
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151 | |
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152 | // Step 4 |
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153 | re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/; |
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154 | re2 = /^(.+?)(s|t)(ion)$/; |
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155 | if (re.test(w)) { |
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156 | var fp = re.exec(w); |
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157 | stem = fp[1]; |
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158 | re = new RegExp(mgr1); |
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159 | if (re.test(stem)) |
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160 | w = stem; |
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161 | } |
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162 | else if (re2.test(w)) { |
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163 | var fp = re2.exec(w); |
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164 | stem = fp[1] + fp[2]; |
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165 | re2 = new RegExp(mgr1); |
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166 | if (re2.test(stem)) |
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167 | w = stem; |
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168 | } |
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169 | |
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170 | // Step 5 |
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171 | re = /^(.+?)e$/; |
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172 | if (re.test(w)) { |
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173 | var fp = re.exec(w); |
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174 | stem = fp[1]; |
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175 | re = new RegExp(mgr1); |
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176 | re2 = new RegExp(meq1); |
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177 | re3 = new RegExp("^" + C + v + "[^aeiouwxy]$"); |
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178 | if (re.test(stem) || (re2.test(stem) && !(re3.test(stem)))) |
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179 | w = stem; |
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180 | } |
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181 | re = /ll$/; |
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182 | re2 = new RegExp(mgr1); |
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183 | if (re.test(w) && re2.test(w)) { |
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184 | re = /.$/; |
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185 | w = w.replace(re,""); |
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186 | } |
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187 | |
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188 | // and turn initial Y back to y |
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189 | if (firstch == "y") |
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190 | w = firstch.toLowerCase() + w.substr(1); |
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191 | return w; |
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192 | } |
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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 | * Simple result scoring code. |
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199 | */ |
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200 | var Scorer = { |
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201 | // Implement the following function to further tweak the score for each result |
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202 | // The function takes a result array [filename, title, anchor, descr, score] |
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203 | // and returns the new score. |
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204 | /* |
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205 | score: function(result) { |
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206 | return result[4]; |
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207 | }, |
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208 | */ |
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209 | |
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210 | // query matches the full name of an object |
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211 | objNameMatch: 11, |
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212 | // or matches in the last dotted part of the object name |
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213 | objPartialMatch: 6, |
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214 | // Additive scores depending on the priority of the object |
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215 | objPrio: {0: 15, // used to be importantResults |
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216 | 1: 5, // used to be objectResults |
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217 | 2: -5}, // used to be unimportantResults |
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218 | // Used when the priority is not in the mapping. |
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219 | objPrioDefault: 0, |
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220 | |
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221 | // query found in title |
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222 | title: 15, |
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223 | // query found in terms |
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224 | term: 5 |
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225 | }; |
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226 | |
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227 | |
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228 | /** |
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229 | * Search Module |
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230 | */ |
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231 | var Search = { |
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232 | |
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233 | _index : null, |
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234 | _queued_query : null, |
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235 | _pulse_status : -1, |
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236 | |
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237 | init : function() { |
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238 | var params = $.getQueryParameters(); |
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239 | if (params.q) { |
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240 | var query = params.q[0]; |
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241 | $('input[name="q"]')[0].value = query; |
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242 | this.performSearch(query); |
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243 | } |
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244 | }, |
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245 | |
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246 | loadIndex : function(url) { |
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247 | $.ajax({type: "GET", url: url, data: null, |
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248 | dataType: "script", cache: true, |
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249 | complete: function(jqxhr, textstatus) { |
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250 | if (textstatus != "success") { |
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251 | document.getElementById("searchindexloader").src = url; |
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252 | } |
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253 | }}); |
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254 | }, |
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255 | |
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256 | setIndex : function(index) { |
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257 | var q; |
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258 | this._index = index; |
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259 | if ((q = this._queued_query) !== null) { |
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260 | this._queued_query = null; |
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261 | Search.query(q); |
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262 | } |
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263 | }, |
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264 | |
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265 | hasIndex : function() { |
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266 | return this._index !== null; |
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267 | }, |
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268 | |
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269 | deferQuery : function(query) { |
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270 | this._queued_query = query; |
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271 | }, |
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272 | |
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273 | stopPulse : function() { |
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274 | this._pulse_status = 0; |
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275 | }, |
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276 | |
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277 | startPulse : function() { |
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278 | if (this._pulse_status >= 0) |
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279 | return; |
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280 | function pulse() { |
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281 | var i; |
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282 | Search._pulse_status = (Search._pulse_status + 1) % 4; |
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283 | var dotString = ''; |
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284 | for (i = 0; i < Search._pulse_status; i++) |
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285 | dotString += '.'; |
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286 | Search.dots.text(dotString); |
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287 | if (Search._pulse_status > -1) |
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288 | window.setTimeout(pulse, 500); |
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289 | } |
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290 | pulse(); |
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291 | }, |
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292 | |
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293 | /** |
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294 | * perform a search for something (or wait until index is loaded) |
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295 | */ |
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296 | performSearch : function(query) { |
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297 | // create the required interface elements |
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298 | this.out = $('#search-results'); |
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299 | this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out); |
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300 | this.dots = $('<span></span>').appendTo(this.title); |
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301 | this.status = $('<p style="display: none"></p>').appendTo(this.out); |
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302 | this.output = $('<ul class="search"/>').appendTo(this.out); |
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303 | |
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304 | $('#search-progress').text(_('Preparing search...')); |
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305 | this.startPulse(); |
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306 | |
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307 | // index already loaded, the browser was quick! |
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308 | if (this.hasIndex()) |
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309 | this.query(query); |
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310 | else |
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311 | this.deferQuery(query); |
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312 | }, |
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313 | |
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314 | /** |
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315 | * execute search (requires search index to be loaded) |
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316 | */ |
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317 | query : function(query) { |
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318 | var i; |
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319 | 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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320 | |
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321 | // stem the searchterms and add them to the correct list |
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322 | var stemmer = new Stemmer(); |
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323 | var searchterms = []; |
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324 | var excluded = []; |
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325 | var hlterms = []; |
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326 | var tmp = query.split(/\s+/); |
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327 | var objectterms = []; |
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328 | for (i = 0; i < tmp.length; i++) { |
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329 | if (tmp[i] !== "") { |
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330 | objectterms.push(tmp[i].toLowerCase()); |
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331 | } |
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332 | |
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333 | if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) || |
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334 | tmp[i] === "") { |
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335 | // skip this "word" |
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336 | continue; |
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337 | } |
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338 | // stem the word |
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339 | var word = stemmer.stemWord(tmp[i].toLowerCase()); |
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340 | var toAppend; |
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341 | // select the correct list |
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342 | if (word[0] == '-') { |
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343 | toAppend = excluded; |
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344 | word = word.substr(1); |
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345 | } |
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346 | else { |
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347 | toAppend = searchterms; |
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348 | hlterms.push(tmp[i].toLowerCase()); |
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349 | } |
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350 | // only add if not already in the list |
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351 | if (!$u.contains(toAppend, word)) |
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352 | toAppend.push(word); |
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353 | } |
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354 | var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" ")); |
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355 | |
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356 | // console.debug('SEARCH: searching for:'); |
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357 | // console.info('required: ', searchterms); |
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358 | // console.info('excluded: ', excluded); |
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359 | |
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360 | // prepare search |
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361 | var terms = this._index.terms; |
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362 | var titleterms = this._index.titleterms; |
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363 | |
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364 | // array of [filename, title, anchor, descr, score] |
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365 | var results = []; |
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366 | $('#search-progress').empty(); |
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367 | |
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368 | // lookup as object |
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369 | for (i = 0; i < objectterms.length; i++) { |
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370 | var others = [].concat(objectterms.slice(0, i), |
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371 | objectterms.slice(i+1, objectterms.length)); |
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372 | results = results.concat(this.performObjectSearch(objectterms[i], others)); |
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373 | } |
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374 | |
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375 | // lookup as search terms in fulltext |
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376 | results = results.concat(this.performTermsSearch(searchterms, excluded, terms, Scorer.term)) |
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377 | .concat(this.performTermsSearch(searchterms, excluded, titleterms, Scorer.title)); |
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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 |
---|
525 | if (Scorer.objPrio.hasOwnProperty(match[2])) { |
---|
526 | score += Scorer.objPrio[match[2]]; |
---|
527 | } else { |
---|
528 | score += Scorer.objPrioDefault; |
---|
529 | } |
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530 | results.push([filenames[match[0]], fullname, '#'+anchor, descr, score]); |
---|
531 | } |
---|
532 | } |
---|
533 | } |
---|
534 | |
---|
535 | return results; |
---|
536 | }, |
---|
537 | |
---|
538 | /** |
---|
539 | * search for full-text terms in the index |
---|
540 | */ |
---|
541 | performTermsSearch : function(searchterms, excluded, terms, score) { |
---|
542 | var filenames = this._index.filenames; |
---|
543 | var titles = this._index.titles; |
---|
544 | |
---|
545 | var i, j, file, files; |
---|
546 | var fileMap = {}; |
---|
547 | var results = []; |
---|
548 | |
---|
549 | // perform the search on the required terms |
---|
550 | for (i = 0; i < searchterms.length; i++) { |
---|
551 | var word = searchterms[i]; |
---|
552 | // no match but word was a required one |
---|
553 | if ((files = terms[word]) === undefined) |
---|
554 | break; |
---|
555 | if (files.length === undefined) { |
---|
556 | files = [files]; |
---|
557 | } |
---|
558 | // create the mapping |
---|
559 | for (j = 0; j < files.length; j++) { |
---|
560 | file = files[j]; |
---|
561 | if (file in fileMap) |
---|
562 | fileMap[file].push(word); |
---|
563 | else |
---|
564 | fileMap[file] = [word]; |
---|
565 | } |
---|
566 | } |
---|
567 | |
---|
568 | // now check if the files don't contain excluded terms |
---|
569 | for (file in fileMap) { |
---|
570 | var valid = true; |
---|
571 | |
---|
572 | // check if all requirements are matched |
---|
573 | if (fileMap[file].length != searchterms.length) |
---|
574 | continue; |
---|
575 | |
---|
576 | // ensure that none of the excluded terms is in the search result |
---|
577 | for (i = 0; i < excluded.length; i++) { |
---|
578 | if (terms[excluded[i]] == file || |
---|
579 | $u.contains(terms[excluded[i]] || [], file)) { |
---|
580 | valid = false; |
---|
581 | break; |
---|
582 | } |
---|
583 | } |
---|
584 | |
---|
585 | // if we have still a valid result we can add it to the result list |
---|
586 | if (valid) { |
---|
587 | results.push([filenames[file], titles[file], '', null, score]); |
---|
588 | } |
---|
589 | } |
---|
590 | return results; |
---|
591 | }, |
---|
592 | |
---|
593 | /** |
---|
594 | * helper function to return a node containing the |
---|
595 | * search summary for a given text. keywords is a list |
---|
596 | * of stemmed words, hlwords is the list of normal, unstemmed |
---|
597 | * words. the first one is used to find the occurance, the |
---|
598 | * latter for highlighting it. |
---|
599 | */ |
---|
600 | makeSearchSummary : function(text, keywords, hlwords) { |
---|
601 | var textLower = text.toLowerCase(); |
---|
602 | var start = 0; |
---|
603 | $.each(keywords, function() { |
---|
604 | var i = textLower.indexOf(this.toLowerCase()); |
---|
605 | if (i > -1) |
---|
606 | start = i; |
---|
607 | }); |
---|
608 | start = Math.max(start - 120, 0); |
---|
609 | var excerpt = ((start > 0) ? '...' : '') + |
---|
610 | $.trim(text.substr(start, 240)) + |
---|
611 | ((start + 240 - text.length) ? '...' : ''); |
---|
612 | var rv = $('<div class="context"></div>').text(excerpt); |
---|
613 | $.each(hlwords, function() { |
---|
614 | rv = rv.highlightText(this, 'highlighted'); |
---|
615 | }); |
---|
616 | return rv; |
---|
617 | } |
---|
618 | }; |
---|
619 | |
---|
620 | $(document).ready(function() { |
---|
621 | Search.init(); |
---|
622 | }); |
---|