106 lines
4.1 KiB
JavaScript
106 lines
4.1 KiB
JavaScript
var lunrIndex, pagesIndex;
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// Initialize lunrjs using our generated index file
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function initLunr() {
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// First retrieve the index file
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$.getJSON(index_url)
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.done(function(index) {
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pagesIndex = index;
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// Set up lunrjs by declaring the fields we use
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// Also provide their boost level for the ranking
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lunrIndex = lunr(function() {
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this.ref('index');
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this.field('title', {
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boost: 15
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});
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this.field('tags', {
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boost: 10
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});
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this.field('content', {
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boost: 5
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});
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this.pipeline.remove(lunr.stemmer);
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this.searchPipeline.remove(lunr.stemmer);
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// Feed lunr with each file and let lunr actually index them
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pagesIndex.forEach(function(page, idx) {
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page.index = idx;
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this.add(page);
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}, this);
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})
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})
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.fail(function(jqxhr, textStatus, error) {
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var err = textStatus + ', ' + error;
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console.error('Error getting Hugo index file:', err);
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});
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}
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/**
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* Trigger a search in lunr and transform the result
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*
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* @param {String} term
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* @return {Array} results
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*/
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function search(term) {
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// Find the item in our index corresponding to the lunr one to have more info
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// Remove Lunr special search characters: https://lunrjs.com/guides/searching.html
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var searchTerm = lunr.tokenizer(term.replace(/[*:^~+-]/, ' ')).reduce( function(a,token){return a.concat(searchPatterns(token.str))}, []).join(' ');
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return !searchTerm ? [] : lunrIndex.search(searchTerm).map(function(result) {
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return { index: result.ref, matches: Object.keys(result.matchData.metadata) }
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});
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}
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function searchPatterns(word) {
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return [
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word + '^100',
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word + '*^10',
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'*' + word + '^10',
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word + '~' + Math.floor(word.length / 4) + '^1' // allow 1 in 4 letters to have a typo
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];
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}
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// Let's get started
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initLunr();
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$(function() {
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var searchList = new autoComplete({
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/* selector for the search box element */
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selectorToInsert: '#header-wrapper',
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selector: '#search-by',
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/* source is the callback to perform the search */
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source: function(term, response) {
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response(search(term));
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},
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/* renderItem displays individual search results */
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renderItem: function(item, term) {
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var page = pagesIndex[item.index];
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var numContextWords = 2;
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var contextPattern = '(?:\\S+ +){0,' + numContextWords + '}\\S*\\b(?:' +
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item.matches.map( function(match){return match.replace(/\W/g, '\\$&')} ).join('|') +
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')\\b\\S*(?: +\\S+){0,' + numContextWords + '}';
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var context = page.content.match(new RegExp(contextPattern, 'i'));
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var divcontext = document.createElement('div');
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divcontext.className = 'context';
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divcontext.innerText = (context || '');
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var divsuggestion = document.createElement('div');
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divsuggestion.className = 'autocomplete-suggestion';
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divsuggestion.setAttribute('data-term', term);
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divsuggestion.setAttribute('data-title', page.title);
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divsuggestion.setAttribute('data-uri', baseUri + page.uri);
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divsuggestion.setAttribute('data-context', context);
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divsuggestion.innerText = '» ' + page.title;
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divsuggestion.appendChild(divcontext);
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return divsuggestion.outerHTML;
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},
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/* onSelect callback fires when a search suggestion is chosen */
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onSelect: function(e, term, item) {
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location.href = item.getAttribute('data-uri');
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}
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});
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// JavaScript-autoComplete only registers the focus event when minChars is 0 which doesn't make sense, let's do it ourselves
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// https://github.com/Pixabay/JavaScript-autoComplete/blob/master/auto-complete.js#L191
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var selector = $('#search-by').get(0);
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$(selector).focus(selector.focusHandler);
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});
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