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[auf-django-sdk.git] / docs / _build / html / _static / searchtools.js
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1/*
2 * searchtools.js_t
3 * ~~~~~~~~~~~~~~~~
4 *
5 * Sphinx JavaScript utilties for the full-text search.
6 *
7 * :copyright: Copyright 2007-2014 by the Sphinx team, see AUTHORS.
8 * :license: BSD, see LICENSE for details.
9 *
10 */
11
12
13/**
14 * Porter Stemmer
15 */
16var Stemmer = function() {
17
18 var step2list = {
19 ational: 'ate',
20 tional: 'tion',
21 enci: 'ence',
22 anci: 'ance',
23 izer: 'ize',
24 bli: 'ble',
25 alli: 'al',
26 entli: 'ent',
27 eli: 'e',
28 ousli: 'ous',
29 ization: 'ize',
30 ation: 'ate',
31 ator: 'ate',
32 alism: 'al',
33 iveness: 'ive',
34 fulness: 'ful',
35 ousness: 'ous',
36 aliti: 'al',
37 iviti: 'ive',
38 biliti: 'ble',
39 logi: 'log'
40 };
41
42 var step3list = {
43 icate: 'ic',
44 ative: '',
45 alize: 'al',
46 iciti: 'ic',
47 ical: 'ic',
48 ful: '',
49 ness: ''
50 };
51
52 var c = "[^aeiou]"; // consonant
53 var v = "[aeiouy]"; // vowel
54 var C = c + "[^aeiouy]*"; // consonant sequence
55 var V = v + "[aeiou]*"; // vowel sequence
56
57 var mgr0 = "^(" + C + ")?" + V + C; // [C]VC... is m>0
58 var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$"; // [C]VC[V] is m=1
59 var mgr1 = "^(" + C + ")?" + V + C + V + C; // [C]VCVC... is m>1
60 var s_v = "^(" + C + ")?" + v; // vowel in stem
61
62 this.stemWord = function (w) {
63 var stem;
64 var suffix;
65 var firstch;
66 var origword = w;
67
68 if (w.length < 3)
69 return w;
70
71 var re;
72 var re2;
73 var re3;
74 var re4;
75
76 firstch = w.substr(0,1);
77 if (firstch == "y")
78 w = firstch.toUpperCase() + w.substr(1);
79
80 // Step 1a
81 re = /^(.+?)(ss|i)es$/;
82 re2 = /^(.+?)([^s])s$/;
83
84 if (re.test(w))
85 w = w.replace(re,"$1$2");
86 else if (re2.test(w))
87 w = w.replace(re2,"$1$2");
88
89 // Step 1b
90 re = /^(.+?)eed$/;
91 re2 = /^(.+?)(ed|ing)$/;
92 if (re.test(w)) {
93 var fp = re.exec(w);
94 re = new RegExp(mgr0);
95 if (re.test(fp[1])) {
96 re = /.$/;
97 w = w.replace(re,"");
98 }
99 }
100 else if (re2.test(w)) {
101 var fp = re2.exec(w);
102 stem = fp[1];
103 re2 = new RegExp(s_v);
104 if (re2.test(stem)) {
105 w = stem;
106 re2 = /(at|bl|iz)$/;
107 re3 = new RegExp("([^aeiouylsz])\\1$");
108 re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");
109 if (re2.test(w))
110 w = w + "e";
111 else if (re3.test(w)) {
112 re = /.$/;
113 w = w.replace(re,"");
114 }
115 else if (re4.test(w))
116 w = w + "e";
117 }
118 }
119
120 // Step 1c
121 re = /^(.+?)y$/;
122 if (re.test(w)) {
123 var fp = re.exec(w);
124 stem = fp[1];
125 re = new RegExp(s_v);
126 if (re.test(stem))
127 w = stem + "i";
128 }
129
130 // Step 2
131 re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;
132 if (re.test(w)) {
133 var fp = re.exec(w);
134 stem = fp[1];
135 suffix = fp[2];
136 re = new RegExp(mgr0);
137 if (re.test(stem))
138 w = stem + step2list[suffix];
139 }
140
141 // Step 3
142 re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;
143 if (re.test(w)) {
144 var fp = re.exec(w);
145 stem = fp[1];
146 suffix = fp[2];
147 re = new RegExp(mgr0);
148 if (re.test(stem))
149 w = stem + step3list[suffix];
150 }
151
152 // Step 4
153 re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;
154 re2 = /^(.+?)(s|t)(ion)$/;
155 if (re.test(w)) {
156 var fp = re.exec(w);
157 stem = fp[1];
158 re = new RegExp(mgr1);
159 if (re.test(stem))
160 w = stem;
161 }
162 else if (re2.test(w)) {
163 var fp = re2.exec(w);
164 stem = fp[1] + fp[2];
165 re2 = new RegExp(mgr1);
166 if (re2.test(stem))
167 w = stem;
168 }
169
170 // Step 5
171 re = /^(.+?)e$/;
172 if (re.test(w)) {
173 var fp = re.exec(w);
174 stem = fp[1];
175 re = new RegExp(mgr1);
176 re2 = new RegExp(meq1);
177 re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");
178 if (re.test(stem) || (re2.test(stem) && !(re3.test(stem))))
179 w = stem;
180 }
181 re = /ll$/;
182 re2 = new RegExp(mgr1);
183 if (re.test(w) && re2.test(w)) {
184 re = /.$/;
185 w = w.replace(re,"");
186 }
187
188 // and turn initial Y back to y
189 if (firstch == "y")
190 w = firstch.toLowerCase() + w.substr(1);
191 return w;
192 }
193}
194
195
196
197/**
198 * Simple result scoring code.
199 */
200var Scorer = {
201 // Implement the following function to further tweak the score for each result
202 // The function takes a result array [filename, title, anchor, descr, score]
203 // and returns the new score.
204 /*
205 score: function(result) {
206 return result[4];
207 },
208 */
209
210 // query matches the full name of an object
211 objNameMatch: 11,
212 // or matches in the last dotted part of the object name
213 objPartialMatch: 6,
214 // Additive scores depending on the priority of the object
215 objPrio: {0: 15, // used to be importantResults
216 1: 5, // used to be objectResults
217 2: -5}, // used to be unimportantResults
218 // Used when the priority is not in the mapping.
219 objPrioDefault: 0,
220
221 // query found in title
222 title: 15,
223 // query found in terms
224 term: 5
225};
226
227
228/**
229 * Search Module
230 */
231var Search = {
232
233 _index : null,
234 _queued_query : null,
235 _pulse_status : -1,
236
237 init : function() {
238 var params = $.getQueryParameters();
239 if (params.q) {
240 var query = params.q[0];
241 $('input[name="q"]')[0].value = query;
242 this.performSearch(query);
243 }
244 },
245
246 loadIndex : function(url) {
247 $.ajax({type: "GET", url: url, data: null,
248 dataType: "script", cache: true,
249 complete: function(jqxhr, textstatus) {
250 if (textstatus != "success") {
251 document.getElementById("searchindexloader").src = url;
252 }
253 }});
254 },
255
256 setIndex : function(index) {
257 var q;
258 this._index = index;
259 if ((q = this._queued_query) !== null) {
260 this._queued_query = null;
261 Search.query(q);
262 }
263 },
264
265 hasIndex : function() {
266 return this._index !== null;
267 },
268
269 deferQuery : function(query) {
270 this._queued_query = query;
271 },
272
273 stopPulse : function() {
274 this._pulse_status = 0;
275 },
276
277 startPulse : function() {
278 if (this._pulse_status >= 0)
279 return;
280 function pulse() {
281 var i;
282 Search._pulse_status = (Search._pulse_status + 1) % 4;
283 var dotString = '';
284 for (i = 0; i < Search._pulse_status; i++)
285 dotString += '.';
286 Search.dots.text(dotString);
287 if (Search._pulse_status > -1)
288 window.setTimeout(pulse, 500);
289 }
290 pulse();
291 },
292
293 /**
294 * perform a search for something (or wait until index is loaded)
295 */
296 performSearch : function(query) {
297 // create the required interface elements
298 this.out = $('#search-results');
299 this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
300 this.dots = $('<span></span>').appendTo(this.title);
301 this.status = $('<p style="display: none"></p>').appendTo(this.out);
302 this.output = $('<ul class="search"/>').appendTo(this.out);
303
304 $('#search-progress').text(_('Preparing search...'));
305 this.startPulse();
306
307 // index already loaded, the browser was quick!
308 if (this.hasIndex())
309 this.query(query);
310 else
311 this.deferQuery(query);
312 },
313
314 /**
315 * execute search (requires search index to be loaded)
316 */
317 query : function(query) {
318 var i;
319 var stopwords = ["a","and","are","as","at","be","but","by","for","if","in","into","is","it","near","no","not","of","on","or","such","that","the","their","then","there","these","they","this","to","was","will","with"];
320
321 // stem the searchterms and add them to the correct list
322 var stemmer = new Stemmer();
323 var searchterms = [];
324 var excluded = [];
325 var hlterms = [];
326 var tmp = query.split(/\s+/);
327 var objectterms = [];
328 for (i = 0; i < tmp.length; i++) {
329 if (tmp[i] !== "") {
330 objectterms.push(tmp[i].toLowerCase());
331 }
332
333 if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i].match(/^\d+$/) ||
334 tmp[i] === "") {
335 // skip this "word"
336 continue;
337 }
338 // stem the word
339 var word = stemmer.stemWord(tmp[i].toLowerCase());
340 var toAppend;
341 // select the correct list
342 if (word[0] == '-') {
343 toAppend = excluded;
344 word = word.substr(1);
345 }
346 else {
347 toAppend = searchterms;
348 hlterms.push(tmp[i].toLowerCase());
349 }
350 // only add if not already in the list
351 if (!$u.contains(toAppend, word))
352 toAppend.push(word);
353 }
354 var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
355
356 // console.debug('SEARCH: searching for:');
357 // console.info('required: ', searchterms);
358 // console.info('excluded: ', excluded);
359
360 // prepare search
361 var terms = this._index.terms;
362 var titleterms = this._index.titleterms;
363
364 // array of [filename, title, anchor, descr, score]
365 var results = [];
366 $('#search-progress').empty();
367
368 // lookup as object
369 for (i = 0; i < objectterms.length; i++) {
370 var others = [].concat(objectterms.slice(0, i),
371 objectterms.slice(i+1, objectterms.length));
372 results = results.concat(this.performObjectSearch(objectterms[i], others));
373 }
374
375 // lookup as search terms in fulltext
376 results = results.concat(this.performTermsSearch(searchterms, excluded, terms, Scorer.term))
377 .concat(this.performTermsSearch(searchterms, excluded, titleterms, Scorer.title));
378
379 // let the scorer override scores with a custom scoring function
380 if (Scorer.score) {
381 for (i = 0; i < results.length; i++)
382 results[i][4] = Scorer.score(results[i]);
383 }
384
385 // now sort the results by score (in opposite order of appearance, since the
386 // display function below uses pop() to retrieve items) and then
387 // alphabetically
388 results.sort(function(a, b) {
389 var left = a[4];
390 var right = b[4];
391 if (left > right) {
392 return 1;
393 } else if (left < right) {
394 return -1;
395 } else {
396 // same score: sort alphabetically
397 left = a[1].toLowerCase();
398 right = b[1].toLowerCase();
399 return (left > right) ? -1 : ((left < right) ? 1 : 0);
400 }
401 });
402
403 // for debugging
404 //Search.lastresults = results.slice(); // a copy
405 //console.info('search results:', Search.lastresults);
406
407 // print the results
408 var resultCount = results.length;
409 function displayNextItem() {
410 // results left, load the summary and display it
411 if (results.length) {
412 var item = results.pop();
413 var listItem = $('<li style="display:none"></li>');
414 if (DOCUMENTATION_OPTIONS.FILE_SUFFIX === '') {
415 // dirhtml builder
416 var dirname = item[0] + '/';
417 if (dirname.match(/\/index\/$/)) {
418 dirname = dirname.substring(0, dirname.length-6);
419 } else if (dirname == 'index/') {
420 dirname = '';
421 }
422 listItem.append($('<a/>').attr('href',
423 DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
424 highlightstring + item[2]).html(item[1]));
425 } else {
426 // normal html builders
427 listItem.append($('<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});