560 lines
16 KiB
JavaScript
560 lines
16 KiB
JavaScript
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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 2007-2011 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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* helper function to return a node containing the
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* search summary for a given text. keywords is a list
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* of stemmed words, hlwords is the list of normal, unstemmed
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* words. the first one is used to find the occurance, the
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* latter for highlighting it.
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*/
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jQuery.makeSearchSummary = function(text, keywords, hlwords) {
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var textLower = text.toLowerCase();
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var start = 0;
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$.each(keywords, function() {
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var i = textLower.indexOf(this.toLowerCase());
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if (i > -1)
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start = i;
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});
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start = Math.max(start - 120, 0);
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var excerpt = ((start > 0) ? '...' : '') +
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$.trim(text.substr(start, 240)) +
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((start + 240 - text.length) ? '...' : '');
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var rv = $('<div class="context"></div>').text(excerpt);
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$.each(hlwords, function() {
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rv = rv.highlightText(this, 'highlighted');
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});
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return rv;
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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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* 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, success: null,
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dataType: "script", cache: true});
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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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Search._pulse_status = (Search._pulse_status + 1) % 4;
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var dotString = '';
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for (var 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
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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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query : function(query) {
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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 (var 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 ($u.indexOf(stopwords, tmp[i]) != -1 || tmp[i].match(/^\d+$/) ||
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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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// select the correct list
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if (word[0] == '-') {
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var toAppend = excluded;
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word = word.substr(1);
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}
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else {
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var 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 (!$.contains(toAppend, word))
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toAppend.push(word);
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};
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var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
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// console.debug('SEARCH: searching for:');
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// console.info('required: ', searchterms);
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// console.info('excluded: ', excluded);
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// prepare search
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var filenames = this._index.filenames;
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var titles = this._index.titles;
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var terms = this._index.terms;
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var fileMap = {};
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var files = null;
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// different result priorities
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var importantResults = [];
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var objectResults = [];
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var regularResults = [];
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var unimportantResults = [];
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$('#search-progress').empty();
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// lookup as object
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for (var 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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var results = this.performObjectSearch(objectterms[i], others);
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// Assume first word is most likely to be the object,
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// other words more likely to be in description.
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// Therefore put matches for earlier words first.
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// (Results are eventually used in reverse order).
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objectResults = results[0].concat(objectResults);
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importantResults = results[1].concat(importantResults);
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unimportantResults = results[2].concat(unimportantResults);
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}
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// perform the search on the required terms
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for (var i = 0; i < searchterms.length; i++) {
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var word = searchterms[i];
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// no match but word was a required one
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if ((files = terms[word]) == null)
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break;
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if (files.length == undefined) {
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files = [files];
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}
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// create the mapping
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for (var j = 0; j < files.length; j++) {
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var file = files[j];
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if (file in fileMap)
|
||
|
|
fileMap[file].push(word);
|
||
|
|
else
|
||
|
|
fileMap[file] = [word];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// now check if the files don't contain excluded terms
|
||
|
|
for (var file in fileMap) {
|
||
|
|
var valid = true;
|
||
|
|
|
||
|
|
// check if all requirements are matched
|
||
|
|
if (fileMap[file].length != searchterms.length)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
// ensure that none of the excluded terms is in the
|
||
|
|
// search result.
|
||
|
|
for (var i = 0; i < excluded.length; i++) {
|
||
|
|
if (terms[excluded[i]] == file ||
|
||
|
|
$.contains(terms[excluded[i]] || [], file)) {
|
||
|
|
valid = false;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// if we have still a valid result we can add it
|
||
|
|
// to the result list
|
||
|
|
if (valid)
|
||
|
|
regularResults.push([filenames[file], titles[file], '', null]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// delete unused variables in order to not waste
|
||
|
|
// memory until list is retrieved completely
|
||
|
|
delete filenames, titles, terms;
|
||
|
|
|
||
|
|
// now sort the regular results descending by title
|
||
|
|
regularResults.sort(function(a, b) {
|
||
|
|
var left = a[1].toLowerCase();
|
||
|
|
var right = b[1].toLowerCase();
|
||
|
|
return (left > right) ? -1 : ((left < right) ? 1 : 0);
|
||
|
|
});
|
||
|
|
|
||
|
|
// combine all results
|
||
|
|
var results = unimportantResults.concat(regularResults)
|
||
|
|
.concat(objectResults).concat(importantResults);
|
||
|
|
|
||
|
|
// print the results
|
||
|
|
var resultCount = results.length;
|
||
|
|
function displayNextItem() {
|
||
|
|
// results left, load the summary and display it
|
||
|
|
if (results.length) {
|
||
|
|
var item = results.pop();
|
||
|
|
var listItem = $('<li style="display:none"></li>');
|
||
|
|
if (DOCUMENTATION_OPTIONS.FILE_SUFFIX == '') {
|
||
|
|
// dirhtml builder
|
||
|
|
var dirname = item[0] + '/';
|
||
|
|
if (dirname.match(/\/index\/$/)) {
|
||
|
|
dirname = dirname.substring(0, dirname.length-6);
|
||
|
|
} else if (dirname == 'index/') {
|
||
|
|
dirname = '';
|
||
|
|
}
|
||
|
|
listItem.append($('<a/>').attr('href',
|
||
|
|
DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
|
||
|
|
highlightstring + item[2]).html(item[1]));
|
||
|
|
} else {
|
||
|
|
// normal html builders
|
||
|
|
listItem.append($('<a/>').attr('href',
|
||
|
|
item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
|
||
|
|
highlightstring + item[2]).html(item[1]));
|
||
|
|
}
|
||
|
|
if (item[3]) {
|
||
|
|
listItem.append($('<span> (' + item[3] + ')</span>'));
|
||
|
|
Search.output.append(listItem);
|
||
|
|
listItem.slideDown(5, function() {
|
||
|
|
displayNextItem();
|
||
|
|
});
|
||
|
|
} else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
|
||
|
|
$.get(DOCUMENTATION_OPTIONS.URL_ROOT + '_sources/' +
|
||
|
|
item[0] + '.txt', function(data) {
|
||
|
|
if (data != '') {
|
||
|
|
listItem.append($.makeSearchSummary(data, searchterms, hlterms));
|
||
|
|
Search.output.append(listItem);
|
||
|
|
}
|
||
|
|
listItem.slideDown(5, function() {
|
||
|
|
displayNextItem();
|
||
|
|
});
|
||
|
|
}, "text");
|
||
|
|
} else {
|
||
|
|
// no source available, just display title
|
||
|
|
Search.output.append(listItem);
|
||
|
|
listItem.slideDown(5, function() {
|
||
|
|
displayNextItem();
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// search finished, update title and status message
|
||
|
|
else {
|
||
|
|
Search.stopPulse();
|
||
|
|
Search.title.text(_('Search Results'));
|
||
|
|
if (!resultCount)
|
||
|
|
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.'));
|
||
|
|
else
|
||
|
|
Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
|
||
|
|
Search.status.fadeIn(500);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
displayNextItem();
|
||
|
|
},
|
||
|
|
|
||
|
|
performObjectSearch : function(object, otherterms) {
|
||
|
|
var filenames = this._index.filenames;
|
||
|
|
var objects = this._index.objects;
|
||
|
|
var objnames = this._index.objnames;
|
||
|
|
var titles = this._index.titles;
|
||
|
|
|
||
|
|
var importantResults = [];
|
||
|
|
var objectResults = [];
|
||
|
|
var unimportantResults = [];
|
||
|
|
|
||
|
|
for (var prefix in objects) {
|
||
|
|
for (var name in objects[prefix]) {
|
||
|
|
var fullname = (prefix ? prefix + '.' : '') + name;
|
||
|
|
if (fullname.toLowerCase().indexOf(object) > -1) {
|
||
|
|
var match = objects[prefix][name];
|
||
|
|
var objname = objnames[match[1]][2];
|
||
|
|
var title = titles[match[0]];
|
||
|
|
// If more than one term searched for, we require other words to be
|
||
|
|
// found in the name/title/description
|
||
|
|
if (otherterms.length > 0) {
|
||
|
|
var haystack = (prefix + ' ' + name + ' ' +
|
||
|
|
objname + ' ' + title).toLowerCase();
|
||
|
|
var allfound = true;
|
||
|
|
for (var i = 0; i < otherterms.length; i++) {
|
||
|
|
if (haystack.indexOf(otherterms[i]) == -1) {
|
||
|
|
allfound = false;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!allfound) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
var descr = objname + _(', in ') + title;
|
||
|
|
anchor = match[3];
|
||
|
|
if (anchor == '')
|
||
|
|
anchor = fullname;
|
||
|
|
else if (anchor == '-')
|
||
|
|
anchor = objnames[match[1]][1] + '-' + fullname;
|
||
|
|
result = [filenames[match[0]], fullname, '#'+anchor, descr];
|
||
|
|
switch (match[2]) {
|
||
|
|
case 1: objectResults.push(result); break;
|
||
|
|
case 0: importantResults.push(result); break;
|
||
|
|
case 2: unimportantResults.push(result); break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// sort results descending
|
||
|
|
objectResults.sort(function(a, b) {
|
||
|
|
return (a[1] > b[1]) ? -1 : ((a[1] < b[1]) ? 1 : 0);
|
||
|
|
});
|
||
|
|
|
||
|
|
importantResults.sort(function(a, b) {
|
||
|
|
return (a[1] > b[1]) ? -1 : ((a[1] < b[1]) ? 1 : 0);
|
||
|
|
});
|
||
|
|
|
||
|
|
unimportantResults.sort(function(a, b) {
|
||
|
|
return (a[1] > b[1]) ? -1 : ((a[1] < b[1]) ? 1 : 0);
|
||
|
|
});
|
||
|
|
|
||
|
|
return [importantResults, objectResults, unimportantResults]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$(document).ready(function() {
|
||
|
|
Search.init();
|
||
|
|
});
|