aerogramme.deuxfleurs.fr/static/js/site.js

246 lines
No EOL
6.4 KiB
JavaScript
Executable file

"use strict";
var indexScriptLoaded = false;
function debounce(func, wait) {
var timeout;
return function () {
var context = this;
var args = arguments;
clearTimeout(timeout);
timeout = setTimeout(function () {
timeout = null;
func.apply(context, args);
}, wait);
};
}
function makeTeaser(body, terms) {
var TERM_WEIGHT = 40;
var NORMAL_WORD_WEIGHT = 2;
var FIRST_WORD_WEIGHT = 8;
var TEASER_MAX_WORDS = 10;
var stemmedTerms = terms.map(function (w) {
return elasticlunr.stemmer(w.toLowerCase());
});
var termFound = false;
var index = 0;
var weighted = [];
var sentences = body.toLowerCase().split(". ");
for (var i in sentences) {
var words = sentences[i].split(" ");
var value = FIRST_WORD_WEIGHT;
for (var j in words) {
var word = words[j];
if (word.length > 0) {
for (var k in stemmedTerms) {
if (elasticlunr.stemmer(word).startsWith(stemmedTerms[k])) {
value = TERM_WEIGHT;
termFound = true;
}
}
weighted.push([word, value, index]);
value = NORMAL_WORD_WEIGHT;
}
index += word.length;
index += 1;
}
index += 1;
}
if (weighted.length === 0) {
return body;
}
var windowWeights = [];
var windowSize = Math.min(weighted.length, TEASER_MAX_WORDS);
var curSum = 0;
for (var i = 0; i < windowSize; i++) {
curSum += weighted[i][1];
}
windowWeights.push(curSum);
for (var i = 0; i < weighted.length - windowSize; i++) {
curSum -= weighted[i][1];
curSum += weighted[i + windowSize][1];
windowWeights.push(curSum);
}
var maxSumIndex = 0;
if (termFound) {
var maxFound = 0;
for (var i = windowWeights.length - 1; i >= 0; i--) {
if (windowWeights[i] > maxFound) {
maxFound = windowWeights[i];
maxSumIndex = i;
}
}
}
var teaser = [];
var startIndex = weighted[maxSumIndex][2];
for (var i = maxSumIndex; i < maxSumIndex + windowSize; i++) {
var word = weighted[i];
if (startIndex < word[2]) {
teaser.push(body.substring(startIndex, word[2]));
startIndex = word[2];
}
if (word[1] === TERM_WEIGHT) {
teaser.push("<b>");
}
startIndex = word[2] + word[0].length;
teaser.push(body.substring(word[2], startIndex));
if (word[1] === TERM_WEIGHT) {
teaser.push("</b>");
}
}
teaser.push("…");
return teaser.join("");
}
function formatSearchResultItem(item, terms) {
return (
`<a href='${item.ref}' class='group flex flex-col space-y-2 hover:bg-gray-100 p-2 rounded'>` +
`<h1 class='text-garage-orange font-semibold'>` + `${item.doc.title}` + `</h1>` +
`<div class='content mt-2'>` +
`${makeTeaser(item.doc.body, terms)}` +
`</div>` +
`</a>`
);
}
function search() {
var $searchInput = document.getElementById("search");
var $searchResults = document.querySelector(".search-results");
var $searchResultsItems = document.querySelector(".search-results__items");
var MAX_ITEMS = 10;
var options = {
bool: "AND",
fields: {
title: { boost: 2 },
body: { boost: 1 },
},
};
var currentTerm = "";
var index = elasticlunr.Index.load(window.searchIndex);
$searchInput.addEventListener(
"keyup",
debounce(function () {
var term = $searchInput.value.trim();
if (term === currentTerm || !index) {
return;
}
$searchResults.style.display = term === "" ? "none" : "block";
$searchResultsItems.innerHTML = "";
if (term === "") {
return;
}
var results = index.search(term, options);
if (results.length === 0) {
$searchResults.style.display = "none";
return;
}
currentTerm = term;
for (var i = 0; i < Math.min(results.length, MAX_ITEMS); i++) {
var item = document.createElement("div");
item.classList.add("mb-4");
item.innerHTML = formatSearchResultItem(results[i], term.split(" "));
$searchResultsItems.appendChild(item);
}
}, 150)
);
}
function openSearchModal() {
if (indexScriptLoaded === false) {
var indexScript = document.createElement('script');
indexScript.setAttribute('src', './search_index.en.js');
document.head.appendChild(indexScript);
indexScriptLoaded = true;
}
document.getElementById('search-modal').classList.remove('hidden');
document.getElementById('search').focus();
document.getElementById('search').select();
}
function closeSearchModal() {
document.getElementById('search-modal').classList.add('hidden');
}
function documentReadyCallback() {
if (localStorage.getItem("theme") === "dark") {
document.body.setAttribute("theme", "dark");
document.querySelectorAll("img, picture, video, pre").forEach(img => img.setAttribute("theme", "dark"));
document.querySelectorAll(".vimeo, .youtube, .chart").forEach(video => video.setAttribute("theme", "dark"));
document.getElementById("dark-mode").setAttribute("title", "Switch to light theme");
}
document.addEventListener('click', function(ev) {
if (ev.target.matches('#nav-search-btn') || ev.target.matches('#nav-search-btn-icon')) {
openSearchModal();
}
else if (ev.target.matches('#close-modal-btn')
|| ev.target.matches('#close-modal-btn-icon')
|| !ev.target.closest('#search-modal')) {
closeSearchModal();
}
});
document.addEventListener('keydown', function(event) {
if (event.altKey && event.key === 's') {
if (document.getElementById('search-modal').classList.contains('hidden')) {
openSearchModal();
} else {
closeSearchModal();
}
}
});
document.addEventListener('keyup', function(ev) {
if (ev.key === "Escape") {
closeSearchModal();
}
});
document.getElementById("search").addEventListener("keyup", () => {
search();
});
if (typeof mermaid !== "undefined") {
mermaid.initialize({ startOnLoad: true });
}
if (typeof renderMathInElement !== "undefined") {
renderMathInElement(document.body, {
delimiters: [
{ left: '$$', right: '$$', display: true },
{ left: '$', right: '$', display: false },
{ left: '\\(', right: '\\)', display: false },
{ left: '\\[', right: '\\]', display: true }
]
});
}
};
if (document.readyState === 'loading') { // Loading hasn't finished yet
document.addEventListener('DOMContentLoaded', documentReadyCallback);
} else { // `DOMContentLoaded` has already fired
documentReadyCallback();
}