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'use strict';
{{ $searchDataFile := printf "%s.search-data.json" .Language.Lang }}
{{ $searchData := resources.Get "search-data.json" | resources.ExecuteAsTemplate $searchDataFile . | resources.Minify | resources.Fingerprint }}
{{ $searchConfig := i18n "bookSearchConfig" | default "{}" }}
(function () {
const searchDataURL = '{{ $searchData.RelPermalink }}';
const indexConfig = Object.assign({{ $searchConfig }}, {
doc: {
id: 'id',
field: ['title', 'content'],
store: ['title', 'href', 'section']
}
});
const input = document.querySelector('#book-search-input');
const results = document.querySelector('#book-search-results');
if (!input) {
return
}
input.addEventListener('focus', init);
input.addEventListener('keyup', search);
document.addEventListener('keypress', focusSearchFieldOnKeyPress);
/**
* @param {Event} event
*/
function focusSearchFieldOnKeyPress(event) {
if (input === document.activeElement) {
return;
}
const characterPressed = String.fromCharCode(event.charCode);
if (!isHotkey(characterPressed)) {
return;
}
input.focus();
event.preventDefault();
}
/**
* @param {String} character
* @returns {Boolean}
*/
function isHotkey(character) {
const dataHotkeys = input.getAttribute('data-hotkeys') || '';
return dataHotkeys.indexOf(character) >= 0;
}
function init() {
input.removeEventListener('focus', init); // init once
input.required = true;
fetch(searchDataURL)
.then(pages => pages.json())
.then(pages => {
window.bookSearchIndex = FlexSearch.create('balance', indexConfig);
window.bookSearchIndex.add(pages);
})
.then(() => input.required = false)
.then(search);
}
function search() {
while (results.firstChild) {
results.removeChild(results.firstChild);
}
if (!input.value) {
return;
}
const searchHits = window.bookSearchIndex.search(input.value, 10);
searchHits.forEach(function (page) {
const li = element('<li><a href></a><small></small></li>');
const a = li.querySelector('a'), small = li.querySelector('small');
a.href = page.href;
a.textContent = page.title;
small.textContent = page.section;
results.appendChild(li);
});
}
}
/**
* @param {String} content
* @returns {Node}
*/
function element(content) {
const div = document.createElement('div');
div.innerHTML = content;
return div.firstChild;
}
})();
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