mirror of
https://github.com/McShelby/hugo-theme-relearn.git
synced 2024-12-18 03:43:31 +00:00
235 lines
8.4 KiB
JavaScript
235 lines
8.4 KiB
JavaScript
window.relearn = window.relearn || {};
|
|
|
|
window.relearn.runInitialSearch = function(){
|
|
if( window.relearn.isSearchInit && window.relearn.isLunrInit ){
|
|
searchDetail();
|
|
}
|
|
}
|
|
|
|
var lunrIndex, pagesIndex;
|
|
|
|
function initLunrIndex( index ){
|
|
pagesIndex = index;
|
|
// Set up lunrjs by declaring the fields we use
|
|
// Also provide their boost level for the ranking
|
|
lunrIndex = lunr(function() {
|
|
this.use(lunr.multiLanguage.apply(null, contentLangs));
|
|
this.ref('index');
|
|
this.field('title', {
|
|
boost: 15
|
|
});
|
|
this.field('tags', {
|
|
boost: 10
|
|
});
|
|
this.field('content', {
|
|
boost: 5
|
|
});
|
|
|
|
this.pipeline.remove(lunr.stemmer);
|
|
this.searchPipeline.remove(lunr.stemmer);
|
|
|
|
// Feed lunr with each file and let lunr actually index them
|
|
pagesIndex.forEach(function(page, idx) {
|
|
page.index = idx;
|
|
this.add(page);
|
|
}, this);
|
|
});
|
|
|
|
window.relearn.isLunrInit = true;
|
|
window.relearn.runInitialSearch();
|
|
}
|
|
|
|
function triggerSearch(){
|
|
searchDetail();
|
|
var input = document.querySelector('#search-by-detail');
|
|
if( !input ){
|
|
return;
|
|
}
|
|
var value = input.value;
|
|
var url = new URL( window.location );
|
|
var oldValue = url.searchParams.get('search-by');
|
|
if( value != oldValue ){
|
|
url.searchParams.set('search-by', value);
|
|
window.history.pushState(url.toString(), '', url);
|
|
}
|
|
}
|
|
|
|
window.addEventListener('popstate', function ( event ) {
|
|
// restart search if browsed thru history
|
|
if (event.state && event.state.indexOf('search.html?search-by=') >= 0) {
|
|
window.location.reload();
|
|
}
|
|
});
|
|
|
|
var input = document.querySelector('#search-by-detail');
|
|
if( input ){
|
|
input.addEventListener( 'keydown', function(event) {
|
|
// if we are pressing ESC in the searchdetail our focus will
|
|
// be stolen by the other event handlers, so we have to refocus
|
|
// here after a short while
|
|
if (event.key == "Escape") {
|
|
setTimeout( function(){ input.focus(); }, 0 );
|
|
}
|
|
});
|
|
}
|
|
|
|
function initLunrJson() {
|
|
// old way to load the search index via XHR;
|
|
// this does not work if pages are served via
|
|
// file:// protocol; this is only left for
|
|
// backward compatiblity if the user did not
|
|
// define the SEARCH output format for the homepage
|
|
if( window.index_json_url && !window.index_js_url ){
|
|
$.getJSON(index_json_url)
|
|
.done(function(index) {
|
|
initLunrIndex(index);
|
|
})
|
|
.fail(function(jqxhr, textStatus, error) {
|
|
var err = textStatus + ', ' + error;
|
|
console.error('Error getting Hugo index file:', err);
|
|
});
|
|
}
|
|
}
|
|
|
|
function initLunrJs() {
|
|
// new way to load our search index
|
|
if( window.index_js_url ){
|
|
var js = document.createElement("script");
|
|
js.src = index_js_url;
|
|
js.setAttribute("async", "");
|
|
js.onload = function(){
|
|
initLunrIndex(relearn_search_index);
|
|
};
|
|
js.onerror = function(e){
|
|
console.error('Error getting Hugo index file');
|
|
};
|
|
document.head.appendChild(js);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Trigger a search in lunr and transform the result
|
|
*
|
|
* @param {String} term
|
|
* @return {Array} results
|
|
*/
|
|
function search(term) {
|
|
// Find the item in our index corresponding to the lunr one to have more info
|
|
// Remove Lunr special search characters: https://lunrjs.com/guides/searching.html
|
|
var searchTerm = lunr.tokenizer(term.replace(/[*:^~+-]/, ' ')).reduce( function(a,token){return a.concat(searchPatterns(token.str))}, []).join(' ');
|
|
return !searchTerm || !lunrIndex ? [] : lunrIndex.search(searchTerm).map(function(result) {
|
|
return { index: result.ref, matches: Object.keys(result.matchData.metadata) }
|
|
});
|
|
}
|
|
|
|
function searchPatterns(word) {
|
|
return [
|
|
word + '^100',
|
|
word + '*^10',
|
|
'*' + word + '^10',
|
|
word + '~' + Math.floor(word.length / 4) + '^1' // allow 1 in 4 letters to have a typo
|
|
];
|
|
}
|
|
|
|
|
|
function resolvePlaceholders( s, args ) {
|
|
var args = args || [];
|
|
// use replace to iterate over the string
|
|
// select the match and check if the related argument is present
|
|
// if yes, replace the match with the argument
|
|
return s.replace(/{([0-9]+)}/g, function (match, index) {
|
|
// check if the argument is present
|
|
return typeof args[index] == 'undefined' ? match : args[index];
|
|
});
|
|
};
|
|
|
|
function searchDetail() {
|
|
var input = document.querySelector('#search-by-detail');
|
|
if( !input ){
|
|
return;
|
|
}
|
|
var value = input.value;
|
|
var results = document.querySelector('#searchresults');
|
|
var hint = document.querySelector('.searchhint');
|
|
hint.innerText = '';
|
|
results.textContent = '';
|
|
var a = search( value );
|
|
if( a.length ){
|
|
hint.innerText = resolvePlaceholders( window.T_N_results_found, [ value, a.length ] );
|
|
a.forEach( function(item){
|
|
var page = pagesIndex[item.index];
|
|
var numContextWords = 10;
|
|
var contextPattern = '(?:\\S+ +){0,' + numContextWords + '}\\S*\\b(?:' +
|
|
item.matches.map( function(match){return match.replace(/\W/g, '\\$&')} ).join('|') +
|
|
')\\b\\S*(?: +\\S+){0,' + numContextWords + '}';
|
|
var context = page.content.match(new RegExp(contextPattern, 'i'));
|
|
var divcontext = document.createElement('div');
|
|
divcontext.className = 'context';
|
|
divcontext.innerText = (context || '');
|
|
var divsuggestion = document.createElement('a');
|
|
divsuggestion.className = 'autocomplete-suggestion';
|
|
divsuggestion.setAttribute('data-term', value);
|
|
divsuggestion.setAttribute('data-title', page.title);
|
|
divsuggestion.setAttribute('href', baseUri + page.uri);
|
|
divsuggestion.setAttribute('data-context', context);
|
|
divsuggestion.innerText = '» ' + page.title;
|
|
divsuggestion.appendChild(divcontext);
|
|
results.appendChild( divsuggestion );
|
|
});
|
|
window.relearn.markSearch();
|
|
}
|
|
else if( value.length ) {
|
|
hint.innerText = resolvePlaceholders( window.T_No_results_found, [ value ] );
|
|
}
|
|
input.focus();
|
|
setTimeout( adjustContentWidth, 0 );
|
|
}
|
|
|
|
// Let's get started
|
|
initLunrJson();
|
|
initLunrJs();
|
|
$(function() {
|
|
var url = new URL( window.location );
|
|
window.history.replaceState(url.toString(), '', url);
|
|
|
|
var searchList = new autoComplete({
|
|
/* selector for the search box element */
|
|
selectorToInsert: '#header-wrapper',
|
|
selector: '#search-by',
|
|
/* source is the callback to perform the search */
|
|
source: function(term, response) {
|
|
response(search(term));
|
|
},
|
|
/* renderItem displays individual search results */
|
|
renderItem: function(item, term) {
|
|
var page = pagesIndex[item.index];
|
|
var numContextWords = 2;
|
|
var contextPattern = '(?:\\S+ +){0,' + numContextWords + '}\\S*\\b(?:' +
|
|
item.matches.map( function(match){return match.replace(/\W/g, '\\$&')} ).join('|') +
|
|
')\\b\\S*(?: +\\S+){0,' + numContextWords + '}';
|
|
var context = page.content.match(new RegExp(contextPattern, 'i'));
|
|
var divcontext = document.createElement('div');
|
|
divcontext.className = 'context';
|
|
divcontext.innerText = (context || '');
|
|
var divsuggestion = document.createElement('div');
|
|
divsuggestion.className = 'autocomplete-suggestion';
|
|
divsuggestion.setAttribute('data-term', term);
|
|
divsuggestion.setAttribute('data-title', page.title);
|
|
divsuggestion.setAttribute('data-uri', baseUri + page.uri);
|
|
divsuggestion.setAttribute('data-context', context);
|
|
divsuggestion.innerText = '» ' + page.title;
|
|
divsuggestion.appendChild(divcontext);
|
|
return divsuggestion.outerHTML;
|
|
},
|
|
/* onSelect callback fires when a search suggestion is chosen */
|
|
onSelect: function(e, term, item) {
|
|
location.href = item.getAttribute('data-uri');
|
|
e.preventDefault();
|
|
}
|
|
});
|
|
|
|
// JavaScript-autoComplete only registers the focus event when minChars is 0 which doesn't make sense, let's do it ourselves
|
|
// https://github.com/Pixabay/JavaScript-autoComplete/blob/master/auto-complete.js#L191
|
|
var selector = $('#search-by').get(0);
|
|
$(selector).focus(selector.focusHandler);
|
|
});
|