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// Adapted from code by Matt Walters https://www.mattwalters.net/posts/2018-03-28-hugo-and-lunr/
(function ($) {
'use strict';
$(document).ready(function () {
const $searchInput = $('.td-search-input');
//
// Options for popover
//
$searchInput.data('html', true);
$searchInput.data('placement', 'bottom');
$searchInput.data(
'template',
'<div class="popover offline-search-result" role="tooltip"><div class="arrow"></div><h3 class="popover-header"></h3><div class="popover-body"></div></div>'
);
//
// Register handler
//
$searchInput.on('change', (event) => {
render($(event.target));
// Hide keyboard on mobile browser
$searchInput.blur();
});
// Prevent reloading page by enter key on sidebar search.
$searchInput.closest('form').on('submit', () => {
return false;
});
//
// Lunr
//
let idx = null; // Lunr index
const resultDetails = new Map(); // Will hold the data for the search results (titles and summaries)
// Set up for an Ajax call to request the JSON data file that is created by Hugo's build process
$.ajax($searchInput.data('offline-search-index-json-src')).then(
(data) => {
idx = lunr(function () {
this.ref('ref');
// If you added more searchable fields to the search index, list them here.
// Here you can specify searchable fields to the search index - e.g. individual toxonomies for you project
// With "boost" you can add weighting for specific (default weighting without boost: 1)
this.field('title', { boost: 5 });
this.field('categories', { boost: 3 });
this.field('tags', { boost: 3 });
// this.field('projects', { boost: 3 }); // example for an individual toxonomy called projects
this.field('description', { boost: 2 });
this.field('body');
data.forEach((doc) => {
this.add(doc);
resultDetails.set(doc.ref, {
title: doc.title,
excerpt: doc.excerpt,
});
});
});
$searchInput.trigger('change');
}
);
const render = ($targetSearchInput) => {
// Dispose the previous result
$targetSearchInput.popover('dispose');
//
// Search
//
if (idx === null) {
return;
}
const searchQuery = $targetSearchInput.val();
if (searchQuery === '') {
return;
}
const results = idx
.query((q) => {
const tokens = lunr.tokenizer(searchQuery.toLowerCase());
tokens.forEach((token) => {
const queryString = token.toString();
q.term(queryString, {
boost: 100,
});
q.term(queryString, {
wildcard:
lunr.Query.wildcard.LEADING |
lunr.Query.wildcard.TRAILING,
boost: 10,
});
q.term(queryString, {
editDistance: 2,
});
});
})
.slice(
0,
$targetSearchInput.data('offline-search-max-results')
);
//
// Make result html
//
const $html = $('<div>');
$html.append(
$('<div>')
.css({
display: 'flex',
justifyContent: 'space-between',
marginBottom: '1em',
})
.append(
$('<span>')
.text('Search results')
.css({ fontWeight: 'bold' })
)
.append(
$('<i>')
.addClass('fas fa-times search-result-close-button')
.css({
cursor: 'pointer',
})
)
);
const $searchResultBody = $('<div>').css({
maxHeight: `calc(100vh - ${
$targetSearchInput.offset().top -
$(window).scrollTop() +
180
}px)`,
overflowY: 'auto',
});
$html.append($searchResultBody);
if (results.length === 0) {
$searchResultBody.append(
$('<p>').text(`No results found for query "${searchQuery}"`)
);
} else {
results.forEach((r) => {
const doc = resultDetails.get(r.ref);
const href =
$searchInput.data('offline-search-base-href') +
r.ref.replace(/^\//, '');
const $entry = $('<div>').addClass('mt-4');
$entry.append(
$('<small>').addClass('d-block text-muted').text(r.ref)
);
$entry.append(
$('<a>')
.addClass('d-block')
.css({
fontSize: '1.2rem',
})
.attr('href', href)
.text(doc.title)
);
$entry.append($('<p>').text(doc.excerpt));
$searchResultBody.append($entry);
});
}
$targetSearchInput.on('shown.bs.popover', () => {
$('.search-result-close-button').on('click', () => {
$targetSearchInput.val('');
$targetSearchInput.trigger('change');
});
});
$targetSearchInput
.data('content', $html[0].outerHTML)
.popover('show');
};
});
})(jQuery);
|
