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/*
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* searchtools.js_t
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* ~~~~~~~~~~~~~~~~
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*
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* Sphinx JavaScript utilties for the full-text search.
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*
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* :copyright: Copyright 2007-2014 by the Sphinx team, see AUTHORS.
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* :license: BSD, see LICENSE for details.
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*
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*/
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/**
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* Porter Stemmer
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*/
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var Stemmer = function() {
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var step2list = {
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ational: 'ate',
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tional: 'tion',
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enci: 'ence',
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anci: 'ance',
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izer: 'ize',
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bli: 'ble',
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alli: 'al',
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entli: 'ent',
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eli: 'e',
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ousli: 'ous',
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ization: 'ize',
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ation: 'ate',
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ator: 'ate',
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alism: 'al',
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iveness: 'ive',
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fulness: 'ful',
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ousness: 'ous',
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aliti: 'al',
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iviti: 'ive',
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biliti: 'ble',
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logi: 'log'
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};
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var step3list = {
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icate: 'ic',
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ative: '',
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alize: 'al',
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iciti: 'ic',
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ical: 'ic',
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ful: '',
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ness: ''
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};
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var c = "[^aeiou]"; // consonant
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var v = "[aeiouy]"; // vowel
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var C = c + "[^aeiouy]*"; // consonant sequence
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var V = v + "[aeiou]*"; // vowel sequence
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var mgr0 = "^(" + C + ")?" + V + C; // [C]VC... is m>0
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var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$"; // [C]VC[V] is m=1
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var mgr1 = "^(" + C + ")?" + V + C + V + C; // [C]VCVC... is m>1
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var s_v = "^(" + C + ")?" + v; // vowel in stem
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this.stemWord = function (w) {
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var stem;
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var suffix;
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var firstch;
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var origword = w;
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if (w.length < 3)
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return w;
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var re;
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var re2;
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var re3;
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var re4;
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firstch = w.substr(0,1);
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if (firstch == "y")
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w = firstch.toUpperCase() + w.substr(1);
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// Step 1a
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re = /^(.+?)(ss|i)es$/;
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re2 = /^(.+?)([^s])s$/;
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if (re.test(w))
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w = w.replace(re,"$1$2");
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else if (re2.test(w))
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w = w.replace(re2,"$1$2");
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// Step 1b
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re = /^(.+?)eed$/;
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re2 = /^(.+?)(ed|ing)$/;
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if (re.test(w)) {
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var fp = re.exec(w);
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re = new RegExp(mgr0);
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if (re.test(fp[1])) {
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re = /.$/;
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w = w.replace(re,"");
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}
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}
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else if (re2.test(w)) {
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var fp = re2.exec(w);
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stem = fp[1];
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re2 = new RegExp(s_v);
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if (re2.test(stem)) {
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w = stem;
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re2 = /(at|bl|iz)$/;
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re3 = new RegExp("([^aeiouylsz])\\1$");
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re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");
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if (re2.test(w))
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w = w + "e";
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else if (re3.test(w)) {
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re = /.$/;
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w = w.replace(re,"");
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}
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else if (re4.test(w))
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w = w + "e";
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}
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}
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// Step 1c
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re = /^(.+?)y$/;
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if (re.test(w)) {
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var fp = re.exec(w);
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stem = fp[1];
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re = new RegExp(s_v);
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if (re.test(stem))
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w = stem + "i";
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}
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// Step 2
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re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;
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if (re.test(w)) {
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var fp = re.exec(w);
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stem = fp[1];
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suffix = fp[2];
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re = new RegExp(mgr0);
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if (re.test(stem))
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w = stem + step2list[suffix];
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}
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// Step 3
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re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;
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if (re.test(w)) {
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var fp = re.exec(w);
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stem = fp[1];
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suffix = fp[2];
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re = new RegExp(mgr0);
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if (re.test(stem))
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w = stem + step3list[suffix];
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}
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// Step 4
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re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;
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re2 = /^(.+?)(s|t)(ion)$/;
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if (re.test(w)) {
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var fp = re.exec(w);
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stem = fp[1];
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re = new RegExp(mgr1);
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if (re.test(stem))
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w = stem;
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}
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else if (re2.test(w)) {
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var fp = re2.exec(w);
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stem = fp[1] + fp[2];
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re2 = new RegExp(mgr1);
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if (re2.test(stem))
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w = stem;
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}
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// Step 5
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re = /^(.+?)e$/;
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if (re.test(w)) {
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var fp = re.exec(w);
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stem = fp[1];
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re = new RegExp(mgr1);
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re2 = new RegExp(meq1);
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re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");
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if (re.test(stem) || (re2.test(stem) && !(re3.test(stem))))
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w = stem;
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}
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re = /ll$/;
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re2 = new RegExp(mgr1);
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if (re.test(w) && re2.test(w)) {
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re = /.$/;
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w = w.replace(re,"");
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}
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// and turn initial Y back to y
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if (firstch == "y")
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w = firstch.toLowerCase() + w.substr(1);
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return w;
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}
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}
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/**
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* Simple result scoring code.
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*/
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var Scorer = {
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// Implement the following function to further tweak the score for each result
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// The function takes a result array [filename, title, anchor, descr, score]
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// and returns the new score.
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/*
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score: function(result) {
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return result[4];
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},
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*/
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// query matches the full name of an object
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objNameMatch: 11,
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// or matches in the last dotted part of the object name
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objPartialMatch: 6,
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// Additive scores depending on the priority of the object
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objPrio: {0: 15, // used to be importantResults
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1: 5, // used to be objectResults
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2: -5}, // used to be unimportantResults
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// Used when the priority is not in the mapping.
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objPrioDefault: 0,
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// query found in title
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title: 15,
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// query found in terms
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term: 5
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};
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/**
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* Search Module
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*/
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var Search = {
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_index : null,
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_queued_query : null,
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_pulse_status : -1,
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init : function() {
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var params = $.getQueryParameters();
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if (params.q) {
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var query = params.q[0];
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$('input[name="q"]')[0].value = query;
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this.performSearch(query);
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}
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},
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loadIndex : function(url) {
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$.ajax({type: "GET", url: url, data: null,
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dataType: "script", cache: true,
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complete: function(jqxhr, textstatus) {
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if (textstatus != "success") {
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document.getElementById("searchindexloader").src = url;
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}
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}});
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},
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setIndex : function(index) {
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var q;
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this._index = index;
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if ((q = this._queued_query) !== null) {
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this._queued_query = null;
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Search.query(q);
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}
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},
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hasIndex : function() {
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return this._index !== null;
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},
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deferQuery : function(query) {
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this._queued_query = query;
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},
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stopPulse : function() {
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this._pulse_status = 0;
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},
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startPulse : function() {
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if (this._pulse_status >= 0)
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return;
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function pulse() {
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var i;
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Search._pulse_status = (Search._pulse_status + 1) % 4;
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var dotString = '';
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for (i = 0; i < Search._pulse_status; i++)
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dotString += '.';
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Search.dots.text(dotString);
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if (Search._pulse_status > -1)
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window.setTimeout(pulse, 500);
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}
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pulse();
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},
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/**
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* perform a search for something (or wait until index is loaded)
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*/
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performSearch : function(query) {
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// create the required interface elements
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this.out = $('#search-results');
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this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
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this.dots = $('<span></span>').appendTo(this.title);
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this.status = $('<p style="display: none"></p>').appendTo(this.out);
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this.output = $('<ul class="search"/>').appendTo(this.out);
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$('#search-progress').text(_('Preparing search...'));
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this.startPulse();
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// index already loaded, the browser was quick!
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if (this.hasIndex())
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this.query(query);
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else
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this.deferQuery(query);
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},
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/**
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* execute search (requires search index to be loaded)
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*/
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query : function(query) {
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var i;
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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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// stem the searchterms and add them to the correct list
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var stemmer = new Stemmer();
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var searchterms = [];
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var excluded = [];
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var hlterms = [];
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var tmp = query.split(/\s+/);
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var objectterms = [];
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for (i = 0; i < tmp.length; i++) {
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if (tmp[i] !== "") {
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objectterms.push(tmp[i].toLowerCase());
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}
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if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
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tmp[i] === "") {
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// skip this "word"
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continue;
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}
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// stem the word
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var word = stemmer.stemWord(tmp[i].toLowerCase());
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var toAppend;
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// select the correct list
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if (word[0] == '-') {
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toAppend = excluded;
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word = word.substr(1);
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}
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else {
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toAppend = searchterms;
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hlterms.push(tmp[i].toLowerCase());
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}
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// only add if not already in the list
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if (!$u.contains(toAppend, word))
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toAppend.push(word);
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}
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var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
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// console.debug('SEARCH: searching for:');
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// console.info('required: ', searchterms);
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// console.info('excluded: ', excluded);
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// prepare search
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var terms = this._index.terms;
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var titleterms = this._index.titleterms;
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// array of [filename, title, anchor, descr, score]
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var results = [];
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$('#search-progress').empty();
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// lookup as object
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for (i = 0; i < objectterms.length; i++) {
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var others = [].concat(objectterms.slice(0, i),
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objectterms.slice(i+1, objectterms.length));
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results = results.concat(this.performObjectSearch(objectterms[i], others));
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}
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// lookup as search terms in fulltext
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results = results.concat(this.performTermsSearch(searchterms, excluded, terms, Scorer.term))
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.concat(this.performTermsSearch(searchterms, excluded, titleterms, Scorer.title));
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// let the scorer override scores with a custom scoring function
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if (Scorer.score) {
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for (i = 0; i < results.length; i++)
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results[i][4] = Scorer.score(results[i]);
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}
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// now sort the results by score (in opposite order of appearance, since the
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// display function below uses pop() to retrieve items) and then
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// alphabetically
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results.sort(function(a, b) {
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var left = a[4];
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var right = b[4];
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if (left > right) {
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return 1;
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} else if (left < right) {
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return -1;
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} else {
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// same score: sort alphabetically
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left = a[1].toLowerCase();
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right = b[1].toLowerCase();
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return (left > right) ? -1 : ((left < right) ? 1 : 0);
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}
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});
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// for debugging
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//Search.lastresults = results.slice(); // a copy
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//console.info('search results:', Search.lastresults);
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// print the results
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var resultCount = results.length;
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function displayNextItem() {
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// results left, load the summary and display it
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if (results.length) {
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var item = results.pop();
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var listItem = $('<li style="display:none"></li>');
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if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
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// dirhtml builder
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var dirname = item[0] + '/';
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if (dirname.match(/\/index\/$/)) {
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dirname = dirname.substring(0, dirname.length-6);
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} else if (dirname == 'index/') {
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dirname = '';
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}
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listItem.append($('<a/>').attr('href',
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DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
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highlightstring + item[2]).html(item[1]));
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} else {
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// normal html builders
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|
427 |
listItem.append($('<a/>').attr('href',
|
|
428 |
item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
|
|
429 |
highlightstring + item[2]).html(item[1]));
|
|
430 |
}
|
|
431 |
if (item[3]) {
|
|
432 |
listItem.append($('<span> (' + item[3] + ')</span>'));
|
|
433 |
Search.output.append(listItem);
|
|
434 |
listItem.slideDown(5, function() {
|
|
435 |
displayNextItem();
|
|
436 |
});
|
|
437 |
} else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
|
|
438 |
$.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + '_sources/' + item[0] + '.txt',
|
|
439 |
dataType: "text",
|
|
440 |
complete: function(jqxhr, textstatus) {
|
|
441 |
var data = jqxhr.responseText;
|
|
442 |
if (data !== '') {
|
|
443 |
listItem.append(Search.makeSearchSummary(data, searchterms, hlterms));
|
|
444 |
}
|
|
445 |
Search.output.append(listItem);
|
|
446 |
listItem.slideDown(5, function() {
|
|
447 |
displayNextItem();
|
|
448 |
});
|
|
449 |
}});
|
|
450 |
} else {
|
|
451 |
// no source available, just display title
|
|
452 |
Search.output.append(listItem);
|
|
453 |
listItem.slideDown(5, function() {
|
|
454 |
displayNextItem();
|
|
455 |
});
|
|
456 |
}
|
|
457 |
}
|
|
458 |
// search finished, update title and status message
|
|
459 |
else {
|
|
460 |
Search.stopPulse();
|
|
461 |
Search.title.text(_('Search Results'));
|
|
462 |
if (!resultCount)
|
|
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.'));
|
|
464 |
else
|
|
465 |
Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
|
|
466 |
Search.status.fadeIn(500);
|
|
467 |
}
|
|
468 |
}
|
|
469 |
displayNextItem();
|
|
470 |
},
|
|
471 |
|
|
472 |
/**
|
|
473 |
* search for object names
|
|
474 |
*/
|
|
475 |
performObjectSearch : function(object, otherterms) {
|
|
476 |
var filenames = this._index.filenames;
|
|
477 |
var objects = this._index.objects;
|
|
478 |
var objnames = this._index.objnames;
|
|
479 |
var titles = this._index.titles;
|
|
480 |
|
|
481 |
var i;
|
|
482 |
var results = [];
|
|
483 |
|
|
484 |
for (var prefix in objects) {
|
|
485 |
for (var name in objects[prefix]) {
|
|
486 |
var fullname = (prefix ? prefix + '.' : '') + name;
|
|
487 |
if (fullname.toLowerCase().indexOf(object) > -1) {
|
|
488 |
var score = 0;
|
|
489 |
var parts = fullname.split('.');
|
|
490 |
// check for different match types: exact matches of full name or
|
|
491 |
// "last name" (i.e. last dotted part)
|
|
492 |
if (fullname == object || parts[parts.length - 1] == object) {
|
|
493 |
score += Scorer.objNameMatch;
|
|
494 |
// matches in last name
|
|
495 |
} else if (parts[parts.length - 1].indexOf(object) > -1) {
|
|
496 |
score += Scorer.objPartialMatch;
|
|
497 |
}
|
|
498 |
var match = objects[prefix][name];
|
|
499 |
var objname = objnames[match[1]][2];
|
|
500 |
var title = titles[match[0]];
|
|
501 |
// If more than one term searched for, we require other words to be
|
|
502 |
// found in the name/title/description
|
|
503 |
if (otherterms.length > 0) {
|
|
504 |
var haystack = (prefix + ' ' + name + ' ' +
|
|
505 |
objname + ' ' + title).toLowerCase();
|
|
506 |
var allfound = true;
|
|
507 |
for (i = 0; i < otherterms.length; i++) {
|
|
508 |
if (haystack.indexOf(otherterms[i]) == -1) {
|
|
509 |
allfound = false;
|
|
510 |
break;
|
|
511 |
}
|
|
512 |
}
|
|
513 |
if (!allfound) {
|
|
514 |
continue;
|
|
515 |
}
|
|
516 |
}
|
|
517 |
var descr = objname + _(', in ') + title;
|
|
518 |
|
|
519 |
var anchor = match[3];
|
|
520 |
if (anchor === '')
|
|
521 |
anchor = fullname;
|
|
522 |
else if (anchor == '-')
|
|
523 |
anchor = objnames[match[1]][1] + '-' + fullname;
|
|
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 |
}
|
|
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 |
}); |