113 lines
2.7 KiB
JavaScript
113 lines
2.7 KiB
JavaScript
'use strict';
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{{ $searchDataFile := printf "%s.search-data.json" .Language.Lang }}
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{{ $searchData := resources.Get "search-data.json" | resources.ExecuteAsTemplate $searchDataFile . | resources.Minify | resources.Fingerprint }}
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{{ $searchConfig := i18n "bookSearchConfig" | default "{}" }}
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(function () {
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const searchDataURL = '{{ $searchData.RelPermalink }}';
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const indexConfig = Object.assign({{ $searchConfig }}, {
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includeScore: true,
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useExtendedSearch: true,
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fieldNormWeight: 1.5,
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threshold: 0.2,
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ignoreLocation: true,
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keys: [
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{
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name: 'title',
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weight: 0.7
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},
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{
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name: 'content',
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weight: 0.3
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}
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]
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});
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const input = document.querySelector('#book-search-input');
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const results = document.querySelector('#book-search-results');
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if (!input) {
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return
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}
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input.addEventListener('focus', init);
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input.addEventListener('keyup', search);
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document.addEventListener('keypress', focusSearchFieldOnKeyPress);
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/**
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* @param {Event} event
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*/
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function focusSearchFieldOnKeyPress(event) {
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if (event.target.value !== undefined) {
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return;
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}
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if (input === document.activeElement) {
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return;
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}
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const characterPressed = String.fromCharCode(event.charCode);
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if (!isHotkey(characterPressed)) {
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return;
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}
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input.focus();
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event.preventDefault();
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}
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/**
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* @param {String} character
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* @returns {Boolean}
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*/
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function isHotkey(character) {
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const dataHotkeys = input.getAttribute('data-hotkeys') || '';
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return dataHotkeys.indexOf(character) >= 0;
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}
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function init() {
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input.removeEventListener('focus', init); // init once
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input.required = true;
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fetch(searchDataURL)
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.then(pages => pages.json())
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.then(pages => {
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window.bookSearchIndex = new Fuse(pages, indexConfig);
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})
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.then(() => input.required = false)
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.then(search);
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}
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function search() {
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while (results.firstChild) {
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results.removeChild(results.firstChild);
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}
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if (!input.value) {
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return;
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}
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const searchHits = window.bookSearchIndex.search(input.value).slice(0,10);
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searchHits.forEach(function (page) {
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const li = element('<li><a href></a><small></small></li>');
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const a = li.querySelector('a'), small = li.querySelector('small');
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a.href = page.item.href;
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a.textContent = page.item.title;
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small.textContent = page.item.section;
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results.appendChild(li);
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});
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}
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/**
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* @param {String} content
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* @returns {Node}
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*/
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function element(content) {
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const div = document.createElement('div');
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div.innerHTML = content;
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return div.firstChild;
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}
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})();
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