source: ammosreader/doc/html/_static/searchtools.js@ 299c79c

AmmosSource guix
Last change on this file since 299c79c was 299c79c, checked in by Enrico Schwass <ennoausberlin@…>, 3 years ago

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1/*
2 * searchtools.js
3 * ~~~~~~~~~~~~~~~~
4 *
5 * Sphinx JavaScript utilities for the full-text search.
6 *
7 * :copyright: Copyright 2007-2022 by the Sphinx team, see AUTHORS.
8 * :license: BSD, see LICENSE for details.
9 *
10 */
11
12if (!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 partialTitle: 7,
40 // query found in terms
41 term: 5,
42 partialTerm: 2
43 };
44}
45
46if (!splitQuery) {
47 function splitQuery(query) {
48 return query.split(/\s+/);
49 }
50}
51
52/**
53 * Search Module
54 */
55var Search = {
56
57 _index : null,
58 _queued_query : null,
59 _pulse_status : -1,
60
61 htmlToText : function(htmlString) {
62 var virtualDocument = document.implementation.createHTMLDocument('virtual');
63 var htmlElement = $(htmlString, virtualDocument);
64 htmlElement.find('.headerlink').remove();
65 docContent = htmlElement.find('[role=main]')[0];
66 if(docContent === undefined) {
67 console.warn("Content block not found. Sphinx search tries to obtain it " +
68 "via '[role=main]'. Could you check your theme or template.");
69 return "";
70 }
71 return docContent.textContent || docContent.innerText;
72 },
73
74 init : function() {
75 var params = $.getQueryParameters();
76 if (params.q) {
77 var query = params.q[0];
78 $('input[name="q"]')[0].value = query;
79 this.performSearch(query);
80 }
81 },
82
83 loadIndex : function(url) {
84 $.ajax({type: "GET", url: url, data: null,
85 dataType: "script", cache: true,
86 complete: function(jqxhr, textstatus) {
87 if (textstatus != "success") {
88 document.getElementById("searchindexloader").src = url;
89 }
90 }});
91 },
92
93 setIndex : function(index) {
94 var q;
95 this._index = index;
96 if ((q = this._queued_query) !== null) {
97 this._queued_query = null;
98 Search.query(q);
99 }
100 },
101
102 hasIndex : function() {
103 return this._index !== null;
104 },
105
106 deferQuery : function(query) {
107 this._queued_query = query;
108 },
109
110 stopPulse : function() {
111 this._pulse_status = 0;
112 },
113
114 startPulse : function() {
115 if (this._pulse_status >= 0)
116 return;
117 function pulse() {
118 var i;
119 Search._pulse_status = (Search._pulse_status + 1) % 4;
120 var dotString = '';
121 for (i = 0; i < Search._pulse_status; i++)
122 dotString += '.';
123 Search.dots.text(dotString);
124 if (Search._pulse_status > -1)
125 window.setTimeout(pulse, 500);
126 }
127 pulse();
128 },
129
130 /**
131 * perform a search for something (or wait until index is loaded)
132 */
133 performSearch : function(query) {
134 // create the required interface elements
135 this.out = $('#search-results');
136 this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
137 this.dots = $('<span></span>').appendTo(this.title);
138 this.status = $('<p class="search-summary">&nbsp;</p>').appendTo(this.out);
139 this.output = $('<ul class="search"/>').appendTo(this.out);
140
141 $('#search-progress').text(_('Preparing search...'));
142 this.startPulse();
143
144 // index already loaded, the browser was quick!
145 if (this.hasIndex())
146 this.query(query);
147 else
148 this.deferQuery(query);
149 },
150
151 /**
152 * execute search (requires search index to be loaded)
153 */
154 query : function(query) {
155 var i;
156
157 // stem the searchterms and add them to the correct list
158 var stemmer = new Stemmer();
159 var searchterms = [];
160 var excluded = [];
161 var hlterms = [];
162 var tmp = splitQuery(query);
163 var objectterms = [];
164 for (i = 0; i < tmp.length; i++) {
165 if (tmp[i] !== "") {
166 objectterms.push(tmp[i].toLowerCase());
167 }
168
169 if ($u.indexOf(stopwords, tmp[i].toLowerCase()) != -1 || tmp[i] === "") {
170 // skip this "word"
171 continue;
172 }
173 // stem the word
174 var word = stemmer.stemWord(tmp[i].toLowerCase());
175 var toAppend;
176 // select the correct list
177 if (word[0] == '-') {
178 toAppend = excluded;
179 word = word.substr(1);
180 }
181 else {
182 toAppend = searchterms;
183 hlterms.push(tmp[i].toLowerCase());
184 }
185 // only add if not already in the list
186 if (!$u.contains(toAppend, word))
187 toAppend.push(word);
188 }
189 var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
190
191 // console.debug('SEARCH: searching for:');
192 // console.info('required: ', searchterms);
193 // console.info('excluded: ', excluded);
194
195 // prepare search
196 var terms = this._index.terms;
197 var titleterms = this._index.titleterms;
198
199 // array of [filename, title, anchor, descr, score]
200 var results = [];
201 $('#search-progress').empty();
202
203 // lookup as object
204 for (i = 0; i < objectterms.length; i++) {
205 var others = [].concat(objectterms.slice(0, i),
206 objectterms.slice(i+1, objectterms.length));
207 results = results.concat(this.performObjectSearch(objectterms[i], others));
208 }
209
210 // lookup as search terms in fulltext
211 results = results.concat(this.performTermsSearch(searchterms, excluded, terms, titleterms));
212
213 // let the scorer override scores with a custom scoring function
214 if (Scorer.score) {
215 for (i = 0; i < results.length; i++)
216 results[i][4] = Scorer.score(results[i]);
217 }
218
219 // now sort the results by score (in opposite order of appearance, since the
220 // display function below uses pop() to retrieve items) and then
221 // alphabetically
222 results.sort(function(a, b) {
223 var left = a[4];
224 var right = b[4];
225 if (left > right) {
226 return 1;
227 } else if (left < right) {
228 return -1;
229 } else {
230 // same score: sort alphabetically
231 left = a[1].toLowerCase();
232 right = b[1].toLowerCase();
233 return (left > right) ? -1 : ((left < right) ? 1 : 0);
234 }
235 });
236
237 // for debugging
238 //Search.lastresults = results.slice(); // a copy
239 //console.info('search results:', Search.lastresults);
240
241 // print the results
242 var resultCount = results.length;
243 function displayNextItem() {
244 // results left, load the summary and display it
245 if (results.length) {
246 var item = results.pop();
247 var listItem = $('<li></li>');
248 var requestUrl = "";
249 var linkUrl = "";
250 if (DOCUMENTATION_OPTIONS.BUILDER === 'dirhtml') {
251 // dirhtml builder
252 var dirname = item[0] + '/';
253 if (dirname.match(/\/index\/$/)) {
254 dirname = dirname.substring(0, dirname.length-6);
255 } else if (dirname == 'index/') {
256 dirname = '';
257 }
258 requestUrl = DOCUMENTATION_OPTIONS.URL_ROOT + dirname;
259 linkUrl = requestUrl;
260
261 } else {
262 // normal html builders
263 requestUrl = DOCUMENTATION_OPTIONS.URL_ROOT + item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX;
264 linkUrl = item[0] + DOCUMENTATION_OPTIONS.LINK_SUFFIX;
265 }
266 listItem.append($('<a/>').attr('href',
267 linkUrl +
268 highlightstring + item[2]).html(item[1]));
269 if (item[3]) {
270 listItem.append($('<span> (' + item[3] + ')</span>'));
271 Search.output.append(listItem);
272 setTimeout(function() {
273 displayNextItem();
274 }, 5);
275 } else if (DOCUMENTATION_OPTIONS.SHOW_SEARCH_SUMMARY) {
276 $.ajax({url: requestUrl,
277 dataType: "text",
278 complete: function(jqxhr, textstatus) {
279 var data = jqxhr.responseText;
280 if (data !== '' && data !== undefined) {
281 var summary = Search.makeSearchSummary(data, searchterms, hlterms);
282 if (summary) {
283 listItem.append(summary);
284 }
285 }
286 Search.output.append(listItem);
287 setTimeout(function() {
288 displayNextItem();
289 }, 5);
290 }});
291 } else {
292 // just display title
293 Search.output.append(listItem);
294 setTimeout(function() {
295 displayNextItem();
296 }, 5);
297 }
298 }
299 // search finished, update title and status message
300 else {
301 Search.stopPulse();
302 Search.title.text(_('Search Results'));
303 if (!resultCount)
304 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.'));
305 else
306 Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
307 Search.status.fadeIn(500);
308 }
309 }
310 displayNextItem();
311 },
312
313 /**
314 * search for object names
315 */
316 performObjectSearch : function(object, otherterms) {
317 var filenames = this._index.filenames;
318 var docnames = this._index.docnames;
319 var objects = this._index.objects;
320 var objnames = this._index.objnames;
321 var titles = this._index.titles;
322
323 var i;
324 var results = [];
325
326 for (var prefix in objects) {
327 for (var iMatch = 0; iMatch != objects[prefix].length; ++iMatch) {
328 var match = objects[prefix][iMatch];
329 var name = match[4];
330 var fullname = (prefix ? prefix + '.' : '') + name;
331 var fullnameLower = fullname.toLowerCase()
332 if (fullnameLower.indexOf(object) > -1) {
333 var score = 0;
334 var parts = fullnameLower.split('.');
335 // check for different match types: exact matches of full name or
336 // "last name" (i.e. last dotted part)
337 if (fullnameLower == object || parts[parts.length - 1] == object) {
338 score += Scorer.objNameMatch;
339 // matches in last name
340 } else if (parts[parts.length - 1].indexOf(object) > -1) {
341 score += Scorer.objPartialMatch;
342 }
343 var objname = objnames[match[1]][2];
344 var title = titles[match[0]];
345 // If more than one term searched for, we require other words to be
346 // found in the name/title/description
347 if (otherterms.length > 0) {
348 var haystack = (prefix + ' ' + name + ' ' +
349 objname + ' ' + title).toLowerCase();
350 var allfound = true;
351 for (i = 0; i < otherterms.length; i++) {
352 if (haystack.indexOf(otherterms[i]) == -1) {
353 allfound = false;
354 break;
355 }
356 }
357 if (!allfound) {
358 continue;
359 }
360 }
361 var descr = objname + _(', in ') + title;
362
363 var anchor = match[3];
364 if (anchor === '')
365 anchor = fullname;
366 else if (anchor == '-')
367 anchor = objnames[match[1]][1] + '-' + fullname;
368 // add custom score for some objects according to scorer
369 if (Scorer.objPrio.hasOwnProperty(match[2])) {
370 score += Scorer.objPrio[match[2]];
371 } else {
372 score += Scorer.objPrioDefault;
373 }
374 results.push([docnames[match[0]], fullname, '#'+anchor, descr, score, filenames[match[0]]]);
375 }
376 }
377 }
378
379 return results;
380 },
381
382 /**
383 * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
384 */
385 escapeRegExp : function(string) {
386 return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
387 },
388
389 /**
390 * search for full-text terms in the index
391 */
392 performTermsSearch : function(searchterms, excluded, terms, titleterms) {
393 var docnames = this._index.docnames;
394 var filenames = this._index.filenames;
395 var titles = this._index.titles;
396
397 var i, j, file;
398 var fileMap = {};
399 var scoreMap = {};
400 var results = [];
401
402 // perform the search on the required terms
403 for (i = 0; i < searchterms.length; i++) {
404 var word = searchterms[i];
405 var files = [];
406 var _o = [
407 {files: terms[word], score: Scorer.term},
408 {files: titleterms[word], score: Scorer.title}
409 ];
410 // add support for partial matches
411 if (word.length > 2) {
412 var word_regex = this.escapeRegExp(word);
413 for (var w in terms) {
414 if (w.match(word_regex) && !terms[word]) {
415 _o.push({files: terms[w], score: Scorer.partialTerm})
416 }
417 }
418 for (var w in titleterms) {
419 if (w.match(word_regex) && !titleterms[word]) {
420 _o.push({files: titleterms[w], score: Scorer.partialTitle})
421 }
422 }
423 }
424
425 // no match but word was a required one
426 if ($u.every(_o, function(o){return o.files === undefined;})) {
427 break;
428 }
429 // found search word in contents
430 $u.each(_o, function(o) {
431 var _files = o.files;
432 if (_files === undefined)
433 return
434
435 if (_files.length === undefined)
436 _files = [_files];
437 files = files.concat(_files);
438
439 // set score for the word in each file to Scorer.term
440 for (j = 0; j < _files.length; j++) {
441 file = _files[j];
442 if (!(file in scoreMap))
443 scoreMap[file] = {};
444 scoreMap[file][word] = o.score;
445 }
446 });
447
448 // create the mapping
449 for (j = 0; j < files.length; j++) {
450 file = files[j];
451 if (file in fileMap && fileMap[file].indexOf(word) === -1)
452 fileMap[file].push(word);
453 else
454 fileMap[file] = [word];
455 }
456 }
457
458 // now check if the files don't contain excluded terms
459 for (file in fileMap) {
460 var valid = true;
461
462 // check if all requirements are matched
463 var filteredTermCount = // as search terms with length < 3 are discarded: ignore
464 searchterms.filter(function(term){return term.length > 2}).length
465 if (
466 fileMap[file].length != searchterms.length &&
467 fileMap[file].length != filteredTermCount
468 ) continue;
469
470 // ensure that none of the excluded terms is in the search result
471 for (i = 0; i < excluded.length; i++) {
472 if (terms[excluded[i]] == file ||
473 titleterms[excluded[i]] == file ||
474 $u.contains(terms[excluded[i]] || [], file) ||
475 $u.contains(titleterms[excluded[i]] || [], file)) {
476 valid = false;
477 break;
478 }
479 }
480
481 // if we have still a valid result we can add it to the result list
482 if (valid) {
483 // select one (max) score for the file.
484 // for better ranking, we should calculate ranking by using words statistics like basic tf-idf...
485 var score = $u.max($u.map(fileMap[file], function(w){return scoreMap[file][w]}));
486 results.push([docnames[file], titles[file], '', null, score, filenames[file]]);
487 }
488 }
489 return results;
490 },
491
492 /**
493 * helper function to return a node containing the
494 * search summary for a given text. keywords is a list
495 * of stemmed words, hlwords is the list of normal, unstemmed
496 * words. the first one is used to find the occurrence, the
497 * latter for highlighting it.
498 */
499 makeSearchSummary : function(htmlText, keywords, hlwords) {
500 var text = Search.htmlToText(htmlText);
501 if (text == "") {
502 return null;
503 }
504 var textLower = text.toLowerCase();
505 var start = 0;
506 $.each(keywords, function() {
507 var i = textLower.indexOf(this.toLowerCase());
508 if (i > -1)
509 start = i;
510 });
511 start = Math.max(start - 120, 0);
512 var excerpt = ((start > 0) ? '...' : '') +
513 $.trim(text.substr(start, 240)) +
514 ((start + 240 - text.length) ? '...' : '');
515 var rv = $('<p class="context"></p>').text(excerpt);
516 $.each(hlwords, function() {
517 rv = rv.highlightText(this, 'highlighted');
518 });
519 return rv;
520 }
521};
522
523$(document).ready(function() {
524 Search.init();
525});
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