/*

 * searchtools.js_t

 * ~~~~~~~~~~~~~~~~

 *

 * Sphinx JavaScript utilities for the full-text search.

 *

 * :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.

 * :license: BSD, see LICENSE for details.

 *

 */

/* Non-minified version JS is _stemmer.js if file is provided */ 

/**

 * Porter Stemmer

 */

var Stemmer = function() {

  var step2list = {

    ational: 'ate',

    tional: 'tion',

    enci: 'ence',

    anci: 'ance',

    izer: 'ize',

    bli: 'ble',

    alli: 'al',

    entli: 'ent',

    eli: 'e',

    ousli: 'ous',

    ization: 'ize',

    ation: 'ate',

    ator: 'ate',

    alism: 'al',

    iveness: 'ive',

    fulness: 'ful',

    ousness: 'ous',

    aliti: 'al',

    iviti: 'ive',

    biliti: 'ble',

    logi: 'log'

  };

  var step3list = {

    icate: 'ic',

    ative: '',

    alize: 'al',

    iciti: 'ic',

    ical: 'ic',

    ful: '',

    ness: ''

  };

  var c = "[^aeiou]";          // consonant

  var v = "[aeiouy]";          // vowel

  var C = c + "[^aeiouy]*";    // consonant sequence

  var V = v + "[aeiou]*";      // vowel sequence

  var mgr0 = "^(" + C + ")?" + V + C;                      // [C]VC... is m>0

  var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$";    // [C]VC[V] is m=1

  var mgr1 = "^(" + C + ")?" + V + C + V + C;              // [C]VCVC... is m>1

  var s_v   = "^(" + C + ")?" + v;                         // vowel in stem

  this.stemWord = function (w) {

    var stem;

    var suffix;

    var firstch;

    var origword = w;

    if (w.length < 3)

      return w;

    var re;

    var re2;

    var re3;

    var re4;

    firstch = w.substr(0,1);

    if (firstch == "y")

      w = firstch.toUpperCase() + w.substr(1);

    // Step 1a

    re = /^(.+?)(ss|i)es$/;

    re2 = /^(.+?)([^s])s$/;

    if (re.test(w))

      w = w.replace(re,"$1$2");

    else if (re2.test(w))

      w = w.replace(re2,"$1$2");

    // Step 1b

    re = /^(.+?)eed$/;

    re2 = /^(.+?)(ed|ing)$/;

    if (re.test(w)) {

      var fp = re.exec(w);

      re = new RegExp(mgr0);

      if (re.test(fp[1])) {

        re = /.$/;

        w = w.replace(re,"");

      }

    }

    else if (re2.test(w)) {

      var fp = re2.exec(w);

      stem = fp[1];

      re2 = new RegExp(s_v);

      if (re2.test(stem)) {

        w = stem;

        re2 = /(at|bl|iz)$/;

        re3 = new RegExp("([^aeiouylsz])\\1$");

        re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");

        if (re2.test(w))

          w = w + "e";

        else if (re3.test(w)) {

          re = /.$/;

          w = w.replace(re,"");

        }

        else if (re4.test(w))

          w = w + "e";

      }

    }

    // Step 1c

    re = /^(.+?)y$/;

    if (re.test(w)) {

      var fp = re.exec(w);

      stem = fp[1];

      re = new RegExp(s_v);

      if (re.test(stem))

        w = stem + "i";

    }

    // Step 2

    re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;

    if (re.test(w)) {

      var fp = re.exec(w);

      stem = fp[1];

      suffix = fp[2];

      re = new RegExp(mgr0);

      if (re.test(stem))

        w = stem + step2list[suffix];

    }

    // Step 3

    re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;

    if (re.test(w)) {

      var fp = re.exec(w);

      stem = fp[1];

      suffix = fp[2];

      re = new RegExp(mgr0);

      if (re.test(stem))

        w = stem + step3list[suffix];

    }

    // Step 4

    re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;

    re2 = /^(.+?)(s|t)(ion)$/;

    if (re.test(w)) {

      var fp = re.exec(w);

      stem = fp[1];

      re = new RegExp(mgr1);

      if (re.test(stem))

        w = stem;

    }

    else if (re2.test(w)) {

      var fp = re2.exec(w);

      stem = fp[1] + fp[2];

      re2 = new RegExp(mgr1);

      if (re2.test(stem))

        w = stem;

    }

    // Step 5

    re = /^(.+?)e$/;

    if (re.test(w)) {

      var fp = re.exec(w);

      stem = fp[1];

      re = new RegExp(mgr1);

      re2 = new RegExp(meq1);

      re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");

      if (re.test(stem) || (re2.test(stem) && !(re3.test(stem))))

        w = stem;

    }

    re = /ll$/;

    re2 = new RegExp(mgr1);

    if (re.test(w) && re2.test(w)) {

      re = /.$/;

      w = w.replace(re,"");

    }

    // and turn initial Y back to y

    if (firstch == "y")

      w = firstch.toLowerCase() + w.substr(1);

    return w;

  }

}

/**

 * Simple result scoring code.

 */

var Scorer = {

  // Implement the following function to further tweak the score for each result

  // The function takes a result array [filename, title, anchor, descr, score]

  // and returns the new score.

  /*

  score: function(result) {

    return result[4];

  },

  */

  // query matches the full name of an object

  objNameMatch: 11,

  // or matches in the last dotted part of the object name

  objPartialMatch: 6,

  // Additive scores depending on the priority of the object

  objPrio: {0:  15,   // used to be importantResults

            1:  5,   // used to be objectResults

            2: -5},  // used to be unimportantResults

  //  Used when the priority is not in the mapping.

  objPrioDefault: 0,

  // query found in title

  title: 15,

  // query found in terms

  term: 5

};

var splitChars = (function() {

    var result = {};

    var singles = [96, 180, 187, 191, 215, 247, 749, 885, 903, 907, 909, 930, 1014, 1648,

         1748, 1809, 2416, 2473, 2481, 2526, 2601, 2609, 2612, 2615, 2653, 2702,

         2706, 2729, 2737, 2740, 2857, 2865, 2868, 2910, 2928, 2948, 2961, 2971,

         2973, 3085, 3089, 3113, 3124, 3213, 3217, 3241, 3252, 3295, 3341, 3345,

         3369, 3506, 3516, 3633, 3715, 3721, 3736, 3744, 3748, 3750, 3756, 3761,

         3781, 3912, 4239, 4347, 4681, 4695, 4697, 4745, 4785, 4799, 4801, 4823,

         4881, 5760, 5901, 5997, 6313, 7405, 8024, 8026, 8028, 8030, 8117, 8125,

         8133, 8181, 8468, 8485, 8487, 8489, 8494, 8527, 11311, 11359, 11687, 11695,

         11703, 11711, 11719, 11727, 11735, 12448, 12539, 43010, 43014, 43019, 43587,

         43696, 43713, 64286, 64297, 64311, 64317, 64319, 64322, 64325, 65141];

    var i, j, start, end;

    for (i = 0; i < singles.length; i++) {

        result[singles[i]] = true;

    }

    var ranges = [[0, 47], [58, 64], [91, 94], [123, 169], [171, 177], [182, 184], [706, 709],

         [722, 735], [741, 747], [751, 879], [888, 889], [894, 901], [1154, 1161],

         [1318, 1328], [1367, 1368], [1370, 1376], [1416, 1487], [1515, 1519], [1523, 1568],

         [1611, 1631], [1642, 1645], [1750, 1764], [1767, 1773], [1789, 1790], [1792, 1807],

         [1840, 1868], [1958, 1968], [1970, 1983], [2027, 2035], [2038, 2041], [2043, 2047],

         [2070, 2073], [2075, 2083], [2085, 2087], [2089, 2307], [2362, 2364], [2366, 2383],

         [2385, 2391], [2402, 2405], [2419, 2424], [2432, 2436], [2445, 2446], [2449, 2450],

         [2483, 2485], [2490, 2492], [2494, 2509], [2511, 2523], [2530, 2533], [2546, 2547],

         [2554, 2564], [2571, 2574], [2577, 2578], [2618, 2648], [2655, 2661], [2672, 2673],

         [2677, 2692], [2746, 2748], [2750, 2767], [2769, 2783], [2786, 2789], [2800, 2820],

         [2829, 2830], [2833, 2834], [2874, 2876], [2878, 2907], [2914, 2917], [2930, 2946],

         [2955, 2957], [2966, 2968], [2976, 2978], [2981, 2983], [2987, 2989], [3002, 3023],

         [3025, 3045], [3059, 3076], [3130, 3132], [3134, 3159], [3162, 3167], [3170, 3173],

         [3184, 3191], [3199, 3204], [3258, 3260], [3262, 3293], [3298, 3301], [3312, 3332],

         [3386, 3388], [3390, 3423], [3426, 3429], [3446, 3449], [3456, 3460], [3479, 3481],

         [3518, 3519], [3527, 3584], [3636, 3647], [3655, 3663], [3674, 3712], [3717, 3718],

         [3723, 3724], [3726, 3731], [3752, 3753], [3764, 3772], [3774, 3775], [3783, 3791],

         [3802, 3803], [3806, 3839], [3841, 3871], [3892, 3903], [3949, 3975], [3980, 4095],

         [4139, 4158], [4170, 4175], [4182, 4185], [4190, 4192], [4194, 4196], [4199, 4205],

         [4209, 4212], [4226, 4237], [4250, 4255], [4294, 4303], [4349, 4351], [4686, 4687],

         [4702, 4703], [4750, 4751], [4790, 4791], [4806, 4807], [4886, 4887], [4955, 4968],

         [4989, 4991], [5008, 5023], [5109, 5120], [5741, 5742], [5787, 5791], [5867, 5869],

         [5873, 5887], [5906, 5919], [5938, 5951], [5970, 5983], [6001, 6015], [6068, 6102],

         [6104, 6107], [6109, 6111], [6122, 6127], [6138, 6159], [6170, 6175], [6264, 6271],

         [6315, 6319], [6390, 6399], [6429, 6469], [6510, 6511], [6517, 6527], [6572, 6592],

         [6600, 6607], [6619, 6655], [6679, 6687], [6741, 6783], [6794, 6799], [6810, 6822],

         [6824, 6916], [6964, 6980], [6988, 6991], [7002, 7042], [7073, 7085], [7098, 7167],

         [7204, 7231], [7242, 7244], [7294, 7400], [7410, 7423], [7616, 7679], [7958, 7959],

         [7966, 7967], [8006, 8007], [8014, 8015], [8062, 8063], [8127, 8129], [8141, 8143],

         [8148, 8149], [8156, 8159], [8173, 8177], [8189, 8303], [8306, 8307], [8314, 8318],

         [8330, 8335], [8341, 8449], [8451, 8454], [8456, 8457], [8470, 8472], [8478, 8483],

         [8506, 8507], [8512, 8516], [8522, 8525], [8586, 9311], [9372, 9449], [9472, 10101],

         [10132, 11263], [11493, 11498], [11503, 11516], [11518, 11519], [11558, 11567],

         [11622, 11630], [11632, 11647], [11671, 11679], [11743, 11822], [11824, 12292],

         [12296, 12320], [12330, 12336], [12342, 12343], [12349, 12352], [12439, 12444],

         [12544, 12548], [12590, 12592], [12687, 12689], [12694, 12703], [12728, 12783],

         [12800, 12831], [12842, 12880], [12896, 12927], [12938, 12976], [12992, 13311],

         [19894, 19967], [40908, 40959], [42125, 42191], [42238, 42239], [42509, 42511],

         [42540, 42559], [42592, 42593], [42607, 42622], [42648, 42655], [42736, 42774],

         [42784, 42785], [42889, 42890], [42893, 43002], [43043, 43055], [43062, 43071],

         [43124, 43137], [43188, 43215], [43226, 43249], [43256, 43258], [43260, 43263],

         [43302, 43311], [43335, 43359], [43389, 43395], [43443, 43470], [43482, 43519],

         [43561, 43583], [43596, 43599], [43610, 43615], [43639, 43641], [43643, 43647],

         [43698, 43700], [43703, 43704], [43710, 43711], [43715, 43738], [43742, 43967],

         [44003, 44015], [44026, 44031], [55204, 55215], [55239, 55242], [55292, 55295],

         [57344, 63743], [64046, 64047], [64110, 64111], [64218, 64255], [64263, 64274],

         [64280, 64284], [64434, 64466], [64830, 64847], [64912, 64913], [64968, 65007],

         [65020, 65135], [65277, 65295], [65306, 65312], [65339, 65344], [65371, 65381],

         [65471, 65473], [65480, 65481], [65488, 65489], [65496, 65497]];

    for (i = 0; i < ranges.length; i++) {

        start = ranges[i][0];

        end = ranges[i][1];

        for (j = start; j <= end; j++) {

            result[j] = true;

        }

    }

    return result;

})();

function splitQuery(query) {

    var result = [];

    var start = -1;

    for (var i = 0; i < query.length; i++) {

        if (splitChars[query.charCodeAt(i)]) {

            if (start !== -1) {

                result.push(query.slice(start, i));

                start = -1;

            }

        } else if (start === -1) {

            start = i;

        }

    }

    if (start !== -1) {

        result.push(query.slice(start));

    }

    return result;

}

/**

 * Search Module

 */

var Search = {

  _index : null,

  _queued_query : null,

  _pulse_status : -1,

  init : function() {

      var params = $.getQueryParameters();

      if (params.q) {

          var query = params.q[0];

          $('input[name="q"]')[0].value = query;

          this.performSearch(query);

      }

  },

  loadIndex : function(url) {

    $.ajax({type: "GET", url: url, data: null,

            dataType: "script", cache: true,

            complete: function(jqxhr, textstatus) {

              if (textstatus != "success") {

                document.getElementById("searchindexloader").src = url;

              }

            }});

  },

  setIndex : function(index) {

    var q;

    this._index = index;

    if ((q = this._queued_query) !== null) {

      this._queued_query = null;

      Search.query(q);

    }

  },

  hasIndex : function() {

      return this._index !== null;

  },

  deferQuery : function(query) {

      this._queued_query = query;

  },

  stopPulse : function() {

      this._pulse_status = 0;

  },

  startPulse : function() {

    if (this._pulse_status >= 0)

        return;

    function pulse() {

      var i;

      Search._pulse_status = (Search._pulse_status + 1) % 4;

      var dotString = '';

      for (i = 0; i < Search._pulse_status; i++)

        dotString += '.';

      Search.dots.text(dotString);

      if (Search._pulse_status > -1)

        window.setTimeout(pulse, 500);

    }

    pulse();

  },

  /**

   * perform a search for something (or wait until index is loaded)

   */

  performSearch : function(query) {

    // create the required interface elements

    this.out = $('#search-results');

    this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);

    this.dots = $('<span></span>').appendTo(this.title);

    this.status = $('<p style="display: none"></p>').appendTo(this.out);

    this.output = $('<ul class="search"/>').appendTo(this.out);

    $('#search-progress').text(_('Preparing search...'));

    this.startPulse();

    // index already loaded, the browser was quick!

    if (this.hasIndex())

      this.query(query);

    else

      this.deferQuery(query);

  },

  /**

   * execute search (requires search index to be loaded)

   */

  query : function(query) {

    var i;

    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"];

    // stem the searchterms and add them to the correct list

    var stemmer = new Stemmer();

    var searchterms = [];

    var excluded = [];

    var hlterms = [];

    var tmp = splitQuery(query);

    var objectterms = [];

    for (i = 0; i < tmp.length; i++) {

      if (tmp[i] !== "") {

          objectterms.push(tmp[i].toLowerCase());

      }

      if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||

          tmp[i] === "") {

        // skip this "word"

        continue;

      }

      // stem the word

      var word = stemmer.stemWord(tmp[i].toLowerCase());

      // prevent stemmer from cutting word smaller than two chars

      if(word.length < 3 && tmp[i].length >= 3) {

        word = tmp[i];

      }

      var toAppend;

      // select the correct list

      if (word[0] == '-') {

        toAppend = excluded;

        word = word.substr(1);

      }

      else {

        toAppend = searchterms;

        hlterms.push(tmp[i].toLowerCase());

      }

      // only add if not already in the list

      if (!$u.contains(toAppend, word))

        toAppend.push(word);

    }

    var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));

    // console.debug('SEARCH: searching for:');

    // console.info('required: ', searchterms);

    // console.info('excluded: ', excluded);

    // prepare search

    var terms = this._index.terms;

    var titleterms = this._index.titleterms;

    // array of [filename, title, anchor, descr, score]

    var results = [];

    $('#search-progress').empty();

    // lookup as object

    for (i = 0; i < objectterms.length; i++) {

      var others = [].concat(objectterms.slice(0, i),

                             objectterms.slice(i+1, objectterms.length));

      results = results.concat(this.performObjectSearch(objectterms[i], others));

    }

    // lookup as search terms in fulltext

    results = results.concat(this.performTermsSearch(searchterms, excluded, terms, titleterms));

    // let the scorer override scores with a custom scoring function

    if (Scorer.score) {

      for (i = 0; i < results.length; i++)

        results[i][4] = Scorer.score(results[i]);

    }

    // now sort the results by score (in opposite order of appearance, since the

    // display function below uses pop() to retrieve items) and then

    // alphabetically

    results.sort(function(a, b) {

      var left = a[4];

      var right = b[4];

      if (left > right) {

        return 1;

      } else if (left < right) {

        return -1;

      } else {

        // same score: sort alphabetically

        left = a[1].toLowerCase();

        right = b[1].toLowerCase();

        return (left > right) ? -1 : ((left < right) ? 1 : 0);

      }

    });

    // for debugging

    //Search.lastresults = results.slice();  // a copy

    //console.info('search results:', Search.lastresults);

    // 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 {