git.m6w6.name Git - awesomized/libmemcached/blob - _static/searchtools.js

   1 /*
   2  * searchtools.js
   3  * ~~~~~~~~~~~~~~~~
   4  *
   5  * Sphinx JavaScript utilities for the full-text search.
   6  *
   7  * :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
   8  * :license: BSD, see LICENSE for details.
   9  *
  10  */
  11
  12 if (!Scorer) {
  13   /**
  14    * Simple result scoring code.
  15    */
  16   var Scorer = {
  17     // Implement the following function to further tweak the score for each result
  18     // The function takes a result array [filename, title, anchor, descr, score]
  19     // and returns the new score.
  20     /*
  21     score: function(result) {
  22       return result[4];
  23     },
  24     */
  25
  26     // query matches the full name of an object
  27     objNameMatch: 11,
  28     // or matches in the last dotted part of the object name
  29     objPartialMatch: 6,
  30     // Additive scores depending on the priority of the object
  31     objPrio: {0:  15,   // used to be importantResults
  32               1:  5,   // used to be objectResults
  33               2: -5},  // used to be unimportantResults
  34     //  Used when the priority is not in the mapping.
  35     objPrioDefault: 0,
  36
  37     // query found in title
  38     title: 15,
  39     // query found in terms
  40     term: 5
  41   };
  42 }
  43
  44 if (!splitQuery) {
  45   function splitQuery(query) {
  46     return query.split(/\s+/);
  47   }
  48 }
  49
  50 /**
  51  * Search Module
  52  */
  53 var Search = {
  54
  55   _index : null,
  56   _queued_query : null,
  57   _pulse_status : -1,
  58
  59   init : function() {
  60       var params = $.getQueryParameters();
  61       if (params.q) {
  62           var query = params.q[0];
  63           $('input[name="q"]')[0].value = query;
  64           this.performSearch(query);
  65       }
  66   },
  67
  68   loadIndex : function(url) {
  69     $.ajax({type: "GET", url: url, data: null,
  70             dataType: "script", cache: true,
  71             complete: function(jqxhr, textstatus) {
  72               if (textstatus != "success") {
  73                 document.getElementById("searchindexloader").src = url;
  74               }
  75             }});
  76   },
  77
  78   setIndex : function(index) {
  79     var q;
  80     this._index = index;
  81     if ((q = this._queued_query) !== null) {
  82       this._queued_query = null;
  83       Search.query(q);
  84     }
  85   },
  86
  87   hasIndex : function() {
  88       return this._index !== null;
  89   },
  90
  91   deferQuery : function(query) {
  92       this._queued_query = query;
  93   },
  94
  95   stopPulse : function() {
  96       this._pulse_status = 0;
  97   },
  98
  99   startPulse : function() {
 100     if (this._pulse_status >= 0)
 101         return;
 102     function pulse() {
 103       var i;
 104       Search._pulse_status = (Search._pulse_status + 1) % 4;
 105       var dotString = '';
 106       for (i = 0; i < Search._pulse_status; i++)
 107         dotString += '.';
 108       Search.dots.text(dotString);
 109       if (Search._pulse_status > -1)
 110         window.setTimeout(pulse, 500);
 111     }
 112     pulse();
 113   },
 114
 115   /**
 116    * perform a search for something (or wait until index is loaded)
 117    */
 118   performSearch : function(query) {
 119     // create the required interface elements
 120     this.out = $('#search-results');
 121     this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
 122     this.dots = $('<span></span>').appendTo(this.title);
 123     this.status = $('<p style="display: none"></p>').appendTo(this.out);
 124     this.output = $('<ul class="search"/>').appendTo(this.out);
 125
 126     $('#search-progress').text(_('Preparing search...'));
 127     this.startPulse();
 128
 129     // index already loaded, the browser was quick!
 130     if (this.hasIndex())
 131       this.query(query);
 132     else
 133       this.deferQuery(query);
 134   },
 135
 136   /**
 137    * execute search (requires search index to be loaded)
 138    */
 139   query : function(query) {
 140     var i;
 141
 142     // stem the searchterms and add them to the correct list
 143     var stemmer = new Stemmer();
 144     var searchterms = [];
 145     var excluded = [];
 146     var hlterms = [];
 147     var tmp = splitQuery(query);
 148     var objectterms = [];
 149     for (i = 0; i < tmp.length; i++) {
 150       if (tmp[i] !== "") {
 151           objectterms.push(tmp[i].toLowerCase());
 152       }
 153
 154       if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
 155           tmp[i] === "") {
 156         // skip this "word"
 157         continue;
 158       }
 159       // stem the word
 160       var word = stemmer.stemWord(tmp[i].toLowerCase());
 161       // prevent stemmer from cutting word smaller than two chars
 162       if(word.length < 3 && tmp[i].length >= 3) {
 163         word = tmp[i];
 164       }
 165       var toAppend;
 166       // select the correct list
 167       if (word[0] == '-') {
 168         toAppend = excluded;
 169         word = word.substr(1);
 170       }
 171       else {
 172         toAppend = searchterms;
 173         hlterms.push(tmp[i].toLowerCase());
 174       }
 175       // only add if not already in the list
 176       if (!$u.contains(toAppend, word))
 177         toAppend.push(word);
 178     }
 179     var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
 180
 181     // console.debug('SEARCH: searching for:');
 182     // console.info('required: ', searchterms);
 183     // console.info('excluded: ', excluded);
 184
 185     // prepare search
 186     var terms = this._index.terms;
 187     var titleterms = this._index.titleterms;
 188
 189     // array of [filename, title, anchor, descr, score]
 190     var results = [];
 191     $('#search-progress').empty();
 192
 193     // lookup as object
 194     for (i = 0; i < objectterms.length; i++) {
 195       var others = [].concat(objectterms.slice(0, i),
 196                              objectterms.slice(i+1, objectterms.length));
 197       results = results.concat(this.performObjectSearch(objectterms[i], others));
 198     }
 199
 200     // lookup as search terms in fulltext
 201     results = results.concat(this.performTermsSearch(searchterms, excluded, terms, titleterms));
 202
 203     // let the scorer override scores with a custom scoring function
 204     if (Scorer.score) {
 205       for (i = 0; i < results.length; i++)
 206         results[i][4] = Scorer.score(results[i]);
 207     }
 208
 209     // now sort the results by score (in opposite order of appearance, since the
 210     // display function below uses pop() to retrieve items) and then
 211     // alphabetically
 212     results.sort(function(a, b) {
 213       var left = a[4];
 214       var right = b[4];
 215       if (left > right) {
 216         return 1;
 217       } else if (left < right) {
 218         return -1;
 219       } else {
 220         // same score: sort alphabetically
 221         left = a[1].toLowerCase();
 222         right = b[1].toLowerCase();
 223         return (left > right) ? -1 : ((left < right) ? 1 : 0);
 224       }
 225     });
 226
 227     // for debugging
 228     //Search.lastresults = results.slice();  // a copy
 229     //console.info('search results:', Search.lastresults);
 230
 231     // print the results
 232     var resultCount = results.length;
 233     function displayNextItem() {
 234       // results left, load the summary and display it
 235       if (results.length) {
 236         var item = results.pop();
 237         var listItem = $('<li style="display:none"></li>');
 238         if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
 239           // dirhtml builder
 240           var dirname = item[0] + '/';
 241           if (dirname.match(/\/index\/$/)) {
 242             dirname = dirname.substring(0, dirname.length-6);
 243           } else if (dirname == 'index/') {
 244             dirname = '';
 245           }
 246           listItem.append($('<a/>').attr('href',
 247             DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
 248             highlightstring + item[2]).html(item[1]));
 249         } else {
 250           // normal html builders
 251           listItem.append($('<a/>').attr('href',
 252             item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
 253             highlightstring + item[2]).html(item[1]));
 254         }
 255         if (item[3]) {
 256           listItem.append($('<span> (' + item[3] + ')</span>'));
 257           Search.output.append(listItem);
 258           listItem.slideDown(5, function() {
 259             displayNextItem();
 260           });
 261         } else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
 262           var suffix = DOCUMENTATION_OPTIONS.SOURCELINK_SUFFIX;
 263           if (suffix === undefined) {
 264             suffix = '.txt';
 265           }
 266           $.ajax({url: DOCUMENTATION_OPTIONS.URL_ROOT + '_sources/' + item[5] + (item[5].slice(-suffix.length) === suffix ? '' : suffix),
 267                   dataType: "text",
 268                   complete: function(jqxhr, textstatus) {
 269                     var data = jqxhr.responseText;
 270                     if (data !== '' && data !== undefined) {
 271                       listItem.append(Search.makeSearchSummary(data, searchterms, hlterms));
 272                     }
 273                     Search.output.append(listItem);
 274                     listItem.slideDown(5, function() {
 275                       displayNextItem();
 276                     });
 277                   }});
 278         } else {
 279           // no source available, just display title
 280           Search.output.append(listItem);
 281           listItem.slideDown(5, function() {
 282             displayNextItem();
 283           });
 284         }
 285       }
 286       // search finished, update title and status message
 287       else {
 288         Search.stopPulse();
 289         Search.title.text(_('Search Results'));
 290         if (!resultCount)
 291           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.'));
 292         else
 293             Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
 294         Search.status.fadeIn(500);
 295       }
 296     }
 297     displayNextItem();
 298   },
 299
 300   /**
 301    * search for object names
 302    */
 303   performObjectSearch : function(object, otherterms) {
 304     var filenames = this._index.filenames;
 305     var docnames = this._index.docnames;
 306     var objects = this._index.objects;
 307     var objnames = this._index.objnames;
 308     var titles = this._index.titles;
 309
 310     var i;
 311     var results = [];
 312
 313     for (var prefix in objects) {
 314       for (var name in objects[prefix]) {
 315         var fullname = (prefix ? prefix + '.' : '') + name;
 316         if (fullname.toLowerCase().indexOf(object) > -1) {
 317           var score = 0;
 318           var parts = fullname.split('.');
 319           // check for different match types: exact matches of full name or
 320           // "last name" (i.e. last dotted part)
 321           if (fullname == object || parts[parts.length - 1] == object) {
 322             score += Scorer.objNameMatch;
 323           // matches in last name
 324           } else if (parts[parts.length - 1].indexOf(object) > -1) {
 325             score += Scorer.objPartialMatch;
 326           }
 327           var match = objects[prefix][name];
 328           var objname = objnames[match[1]][2];
 329           var title = titles[match[0]];
 330           // If more than one term searched for, we require other words to be
 331           // found in the name/title/description
 332           if (otherterms.length > 0) {
 333             var haystack = (prefix + ' ' + name + ' ' +
 334                             objname + ' ' + title).toLowerCase();
 335             var allfound = true;
 336             for (i = 0; i < otherterms.length; i++) {
 337               if (haystack.indexOf(otherterms[i]) == -1) {
 338                 allfound = false;
 339                 break;
 340               }
 341             }
 342             if (!allfound) {
 343               continue;
 344             }
 345           }
 346           var descr = objname + _(', in ') + title;
 347
 348           var anchor = match[3];
 349           if (anchor === '')
 350             anchor = fullname;
 351           else if (anchor == '-')
 352             anchor = objnames[match[1]][1] + '-' + fullname;
 353           // add custom score for some objects according to scorer
 354           if (Scorer.objPrio.hasOwnProperty(match[2])) {
 355             score += Scorer.objPrio[match[2]];
 356           } else {
 357             score += Scorer.objPrioDefault;
 358           }
 359           results.push([docnames[match[0]], fullname, '#'+anchor, descr, score, filenames[match[0]]]);
 360         }
 361       }
 362     }
 363
 364     return results;
 365   },
 366
 367   /**
 368    * search for full-text terms in the index
 369    */
 370   performTermsSearch : function(searchterms, excluded, terms, titleterms) {
 371     var docnames = this._index.docnames;
 372     var filenames = this._index.filenames;
 373     var titles = this._index.titles;
 374
 375     var i, j, file;
 376     var fileMap = {};
 377     var scoreMap = {};
 378     var results = [];
 379
 380     // perform the search on the required terms
 381     for (i = 0; i < searchterms.length; i++) {
 382       var word = searchterms[i];
 383       var files = [];
 384       var _o = [
 385         {files: terms[word], score: Scorer.term},
 386         {files: titleterms[word], score: Scorer.title}
 387       ];
 388
 389       // no match but word was a required one
 390       if ($u.every(_o, function(o){return o.files === undefined;})) {
 391         break;
 392       }
 393       // found search word in contents
 394       $u.each(_o, function(o) {
 395         var _files = o.files;
 396         if (_files === undefined)
 397           return
 398
 399         if (_files.length === undefined)
 400           _files = [_files];
 401         files = files.concat(_files);
 402
 403         // set score for the word in each file to Scorer.term
 404         for (j = 0; j < _files.length; j++) {
 405           file = _files[j];
 406           if (!(file in scoreMap))
 407             scoreMap[file] = {}
 408           scoreMap[file][word] = o.score;
 409         }
 410       });
 411
 412       // create the mapping
 413       for (j = 0; j < files.length; j++) {
 414         file = files[j];
 415         if (file in fileMap)
 416           fileMap[file].push(word);
 417         else
 418           fileMap[file] = [word];
 419       }
 420     }
 421
 422     // now check if the files don't contain excluded terms
 423     for (file in fileMap) {
 424       var valid = true;
 425
 426       // check if all requirements are matched
 427       if (fileMap[file].length != searchterms.length)
 428           continue;
 429
 430       // ensure that none of the excluded terms is in the search result
 431       for (i = 0; i < excluded.length; i++) {
 432         if (terms[excluded[i]] == file ||
 433             titleterms[excluded[i]] == file ||
 434             $u.contains(terms[excluded[i]] || [], file) ||
 435             $u.contains(titleterms[excluded[i]] || [], file)) {
 436           valid = false;
 437           break;
 438         }
 439       }
 440
 441       // if we have still a valid result we can add it to the result list
 442       if (valid) {
 443         // select one (max) score for the file.
 444         // for better ranking, we should calculate ranking by using words statistics like basic tf-idf...
 445         var score = $u.max($u.map(fileMap[file], function(w){return scoreMap[file][w]}));
 446         results.push([docnames[file], titles[file], '', null, score, filenames[file]]);
 447       }
 448     }
 449     return results;
 450   },
 451
 452   /**
 453    * helper function to return a node containing the
 454    * search summary for a given text. keywords is a list
 455    * of stemmed words, hlwords is the list of normal, unstemmed
 456    * words. the first one is used to find the occurrence, the
 457    * latter for highlighting it.
 458    */
 459   makeSearchSummary : function(text, keywords, hlwords) {
 460     var textLower = text.toLowerCase();
 461     var start = 0;
 462     $.each(keywords, function() {
 463       var i = textLower.indexOf(this.toLowerCase());
 464       if (i > -1)
 465         start = i;
 466     });
 467     start = Math.max(start - 120, 0);
 468     var excerpt = ((start > 0) ? '...' : '') +
 469       $.trim(text.substr(start, 240)) +
 470       ((start + 240 - text.length) ? '...' : '');
 471     var rv = $('<div class="context"></div>').text(excerpt);
 472     $.each(hlwords, function() {
 473       rv = rv.highlightText(this, 'highlighted');
 474     });
 475     return rv;
 476   }
 477 };
 478
 479 $(document).ready(function() {
 480   Search.init();
 481 });