| var base_path = 'function' === typeof importScripts ? '.' : '/search/'; |
| var allowSearch = false; |
| var index; |
| var documents = {}; |
| var lang = ['en']; |
| var data; |
| |
| function getScript(script, callback) { |
| console.log('Loading script: ' + script); |
| $.getScript(base_path + script).done(function () { |
| callback(); |
| }).fail(function (jqxhr, settings, exception) { |
| console.log('Error: ' + exception); |
| }); |
| } |
| |
| function getScriptsInOrder(scripts, callback) { |
| if (scripts.length === 0) { |
| callback(); |
| return; |
| } |
| getScript(scripts[0], function() { |
| getScriptsInOrder(scripts.slice(1), callback); |
| }); |
| } |
| |
| function loadScripts(urls, callback) { |
| if( 'function' === typeof importScripts ) { |
| importScripts.apply(null, urls); |
| callback(); |
| } else { |
| getScriptsInOrder(urls, callback); |
| } |
| } |
| |
| function onJSONLoaded () { |
| data = JSON.parse(this.responseText); |
| var scriptsToLoad = ['lunr.js']; |
| if (data.config && data.config.lang && data.config.lang.length) { |
| lang = data.config.lang; |
| } |
| if (lang.length > 1 || lang[0] !== "en") { |
| scriptsToLoad.push('lunr.stemmer.support.js'); |
| if (lang.length > 1) { |
| scriptsToLoad.push('lunr.multi.js'); |
| } |
| for (var i=0; i < lang.length; i++) { |
| if (lang[i] != 'en') { |
| scriptsToLoad.push(['lunr', lang[i], 'js'].join('.')); |
| } |
| } |
| } |
| loadScripts(scriptsToLoad, onScriptsLoaded); |
| } |
| |
| function onScriptsLoaded () { |
| console.log('All search scripts loaded, building Lunr index...'); |
| if (data.config && data.config.separator && data.config.separator.length) { |
| lunr.tokenizer.separator = new RegExp(data.config.separator); |
| } |
| if (data.index) { |
| index = lunr.Index.load(data.index); |
| data.docs.forEach(function (doc) { |
| documents[doc.location] = doc; |
| }); |
| console.log('Lunr pre-built index loaded, search ready'); |
| } else { |
| index = lunr(function () { |
| if (lang.length === 1 && lang[0] !== "en" && lunr[lang[0]]) { |
| this.use(lunr[lang[0]]); |
| } else if (lang.length > 1) { |
| this.use(lunr.multiLanguage.apply(null, lang)); // spread operator not supported in all browsers: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Spread_operator#Browser_compatibility |
| } |
| this.field('title'); |
| this.field('text'); |
| this.ref('location'); |
| |
| for (var i=0; i < data.docs.length; i++) { |
| var doc = data.docs[i]; |
| this.add(doc); |
| documents[doc.location] = doc; |
| } |
| }); |
| console.log('Lunr index built, search ready'); |
| } |
| allowSearch = true; |
| postMessage({allowSearch: allowSearch}); |
| } |
| |
| function init () { |
| var oReq = new XMLHttpRequest(); |
| oReq.addEventListener("load", onJSONLoaded); |
| var index_path = base_path + '/search_index.json'; |
| if( 'function' === typeof importScripts ){ |
| index_path = 'search_index.json'; |
| } |
| oReq.open("GET", index_path); |
| oReq.send(); |
| } |
| |
| function search (query) { |
| if (!allowSearch) { |
| console.error('Assets for search still loading'); |
| return; |
| } |
| |
| var resultDocuments = []; |
| var results = index.search(query); |
| for (var i=0; i < results.length; i++){ |
| var result = results[i]; |
| doc = documents[result.ref]; |
| doc.summary = doc.text.substring(0, 200); |
| resultDocuments.push(doc); |
| } |
| return resultDocuments; |
| } |
| |
| if( 'function' === typeof importScripts ) { |
| onmessage = function (e) { |
| if (e.data.init) { |
| init(); |
| } else if (e.data.query) { |
| postMessage({ results: search(e.data.query) }); |
| } else { |
| console.error("Worker - Unrecognized message: " + e); |
| } |
| }; |
| } |