Files
pagerite/frontend/src/pagerite.js
T
LeoVasanko 6d2ae104d7 Fix analytics classification: ignore bot-UA pings, skip preload GETs.
JS-running crawlers (Googlebot, GoogleOther, Applebot) execute pagerite.js
and send navigation pings, registering as visitors. Pings whose User-Agent
matches _is_bot_ua (any "bot" token plus listed exceptions) are now
ignored, so their document GETs flush to the crawler list as intended. No
source verification: a spoofed bot UA merely lands in the crawler stats,
and path-based abuse classification catches scanners regardless.

Idle-time link preloads from pagerite.js were queued as pending crawler
hits and flushed to the crawler list whenever the user navigated more than
10s later, so real visitors' subpage loads showed up as crawler hits.
Preload fetches now carry an x-pagerite-preload header and the document
GET handler skips tracking for them; the ping sent on actual navigation
does the counting.
2026-08-22 18:23:38 +00:00

822 lines
32 KiB
JavaScript

// Fetch-navigation: swap dynamic regions (#nav, #main) instead of full
// page loads. Real <a href> links are used throughout, so this is pure
// progressive enhancement - without JS every link does a normal load.
//
// Also: scroll-reveal effects and code copy buttons. These need no
// support from the article itself and are re-applied after each swap.
import { OverlayScrollbars } from "overlayscrollbars";
import "overlayscrollbars/overlayscrollbars.css";
(() => {
// Overlay scrollbars: the native kind reserves a strip of layout (or
// shifts the layout when it appears; overflow: overlay is dead), so we
// replace it with floating ones that cover content instead. The body
// remains the native viewport scroller — window scroll events, scrollY
// and scroll restoration are unaffected; only the scrollbar UI is
// custom. Theme variables are in pagerite.css.
OverlayScrollbars(document.body, {
scrollbars: { autoHide: "scroll" },
});
if (import.meta.env.DEV) {
// In dev the base stylesheet is injected by Vite from JS (linking the
// raw module would pull in its HMR wrapper). Theme and banner-design
// stylesheets are plain files served by the backend (/_themes/...), so
// the backend renders their <link>s in both dev and prod. The injected
// base styles land at the end of <head> — after them, restore the
// canonical order: base < theme < banner design < custom CSS (whose
// equal-specificity :root rules — font variables — must win by order).
import("./assets/pagerite.css").then(() => {
for (const id of ["pagerite-theme", "pagerite-banner", "pagerite-user"]) {
const el = document.getElementById(id);
if (el) document.head.append(el);
}
});
}
// Regions every page has. #sidebar is NOT among them: it is omitted
// entirely when the section has no sub-navigation, and handled below.
const REGIONS = ["page-banner", "nav", "main"];
const reduceMotion = matchMedia("(prefers-reduced-motion: reduce)");
let editorModule = null;
// --- Auth-gated edit pens ---------------------------------------------
// Pages render identically for everyone; the 🖊️ pens are injected by JS
// only after we know the user has pagerite:admin access. We probe our own
// /_api/settings endpoint: the same reverse proxy that gates /_api returns
// 401/403 here, and a 200 means the permission is present.
//
// When Paskia SSO is in use (probed via /auth/api/settings), the banner
// corner gets a plain link to /auth/ — 🔑 log in for anonymous visitors,
// 🔐 profile when logged in. Normal navigation: Paskia does not support
// being iframed, and history.back() returns to the page as-is (the
// pageshow handler below re-probes auth to refresh the pens).
let ssoAvailable = false;
let isAdmin = false;
let editorMeta = null;
// Asset URLs for the on-demand bundles. Dev renders them as
// pagerite:* meta tags (Vite dev-server URLs); production inlines all
// page assets and carries the on-demand URLs in a JSON script instead.
const assets = (() => {
const el = document.getElementById("pagerite-assets");
if (el) return JSON.parse(el.textContent);
const map = {};
for (const m of document.querySelectorAll('meta[name^="pagerite:"]')) {
map[m.name] = m.content;
}
return map;
})();
function makePen(mode) {
const btn = document.createElement("button");
btn.type = "button";
btn.dataset.editorSrc = editorMeta.src;
btn.dataset.editorCss = editorMeta.css || "";
btn.dataset.editorMode = mode;
if (mode === "page") {
btn.className = "edit-link";
btn.title = "edit page";
btn.textContent = "🖊️";
} else if (mode === "banner") {
btn.className = "edit-link";
btn.title = "edit banner";
btn.textContent = "🖊️";
} else {
btn.className = "edit-link site-edit-link";
btn.title = "site settings";
btn.textContent = "⚙️";
}
return btn;
}
function injectPagePen() {
const article = document.querySelector("#main article");
if (article && !article.querySelector("button.edit-link")) {
article.prepend(makePen("page"));
}
}
function makeAuthLink(admin) {
const a = document.createElement("a");
a.className = admin ? "profile-link" : "login-link";
a.href = "/auth/";
a.title = admin ? "profile" : "log in";
a.textContent = admin ? "\u{1F510}" : "\u{1F511}";
return a;
}
function renderAuthUi() {
// Editing is open for admins and, as a dev/no-proxy fallback, when no
// Paskia SSO is detected at all.
const canEdit = isAdmin || !ssoAvailable;
// The analytics page is a read-only dashboard: editing pens and the side
// panel do not apply there. Login/logout links are still useful.
const onAnalytics = currentPath === "/_a";
const banner = document.getElementById("page-banner");
if (banner) {
const old = banner.parentElement.querySelector(".editor-pens");
if (old) old.remove();
const pens = document.createElement("div");
pens.className = "editor-pens";
if (canEdit && !onAnalytics) {
pens.append(makePen("banner"));
pens.append(makePen("site"));
// Analytics viewer is now a normal page at /_a.
const a = document.createElement("a");
a.className = "edit-link analytics-link";
a.href = "/_a";
a.title = "analytics";
a.textContent = "📊";
pens.append(a);
}
if (ssoAvailable) pens.append(makeAuthLink(isAdmin));
banner.after(pens);
}
if (canEdit && !onAnalytics) injectPagePen();
}
async function setupAuth() {
const src = assets["pagerite:editor-src"];
if (!src) { pingEntryOnce(); return; }
editorMeta = {
src,
css: assets["pagerite:editor-css"],
};
// Detect whether Paskia SSO is available on this site.
try {
const ssoRes = await fetch("/auth/api/settings");
ssoAvailable = ssoRes.ok;
} catch {
ssoAvailable = false;
}
// Check whether the current session has pagerite:admin.
isAdmin = false;
try {
isAdmin = (await fetch("/_api/settings")).status === 200;
} catch {
// No auth proxy / dev.
}
if (isAdmin) {
// Teach the backend the site's public origin (used for absolute
// social/canonical URLs): unlike request headers, location.origin
// reflects the real scheme and host even behind reverse proxies.
fetch("/_api/site-url", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify({ url: location.origin }),
}).catch(() => {});
// Warm the cache with the editor bundle: the hashed asset is
// immutable, so preloading costs nothing and the pens then open
// instantly. The analytics page has no editor.
if (currentPath !== "/_a" && !import.meta.env.DEV) {
const preload = document.createElement("link");
preload.rel = "modulepreload";
preload.href = src;
document.head.append(preload);
}
}
renderAuthUi();
pingEntryOnce();
}
// Returning to the page via history back/forward may restore a cached
// copy whose auth UI predates a login/logout — re-probe and re-render.
addEventListener("pageshow", (ev) => {
if (ev.persisted) setupAuth();
});
function runScripts(root) {
// Scripts inserted via DOM swapping do not execute; re-create them.
for (const old of root.querySelectorAll("script")) {
const s = document.createElement("script");
for (const a of old.attributes) s.setAttribute(a.name, a.value);
s.textContent = old.textContent;
old.replaceWith(s);
}
}
// --- Scroll reveal + code block copy buttons -------------------------
const observer = new IntersectionObserver((entries) => {
for (const e of entries) {
if (e.isIntersecting) {
e.target.classList.add("in");
observer.unobserve(e.target);
}
}
}, { rootMargin: "0px 0px -8% 0px" });
function addCopyButtons(main) {
for (const pre of main.querySelectorAll("pre")) {
if (pre.querySelector(".copy")) continue;
const btn = document.createElement("button");
btn.className = "copy";
btn.type = "button";
btn.textContent = "copy";
btn.addEventListener("click", async () => {
const code = pre.querySelector("code");
await navigator.clipboard.writeText(
(code || pre).textContent.replace(/\n$/, ""),
);
btn.textContent = "copied";
btn.classList.add("copied");
setTimeout(() => {
btn.textContent = "copy";
btn.classList.remove("copied");
}, 1500);
});
pre.append(btn);
}
}
// Tuck the article edit pen at the end of the first h1 (which may come
// from the markdown itself). Re-runs when the editor replaces the
// previewed body, since that wipes elements inside it.
function placeEditPen() {
const article = document.querySelector("#main article");
const btn = article?.querySelector("button.edit-link");
// First visible h1: the title h1 may be display:none when the
// markdown owns its heading (editor preview state).
const h1 = [...(article?.querySelectorAll("h1") || [])]
.find((h) => h.offsetParent !== null);
if (btn && h1 && btn.parentElement !== h1) h1.append(btn);
}
addEventListener("pagerite:preview", () => {
// The editors' in-place swaps (SiteEditor.loadPlain) replace #main
// without applyEffects, discarding the injected pens; re-add them
// before tucking the article pen into the h1. Without this a freshly
// created page has no pen for commitPending's handover click.
renderAuthUi();
placeEditPen();
});
function applyEffects() {
(window.requestIdleCallback || setTimeout)(preload);
const main = document.getElementById("main");
addCopyButtons(main);
// Fetch-navigation swaps #main, discarding the article pen and corner
// buttons; re-add whichever auth UI is appropriate for this session.
renderAuthUi();
placeEditPen();
fitNav();
// Multi-column layout only when there is enough text to justify it.
// Split the body into columned segments: h1s, h2s and wide figures are
// full-width separators and never go inside columns.
const article = main.querySelector("article");
if (article) {
const body = article.querySelector(".body");
article.classList.toggle(
"multicol",
!!body && body.textContent.trim().length > 1800,
);
if (body && article.classList.contains("multicol")
&& !body.querySelector(".colseg")) {
// h1s, h2s and anything holding a wide image are full-width
// separators
const isSeparator = (el) =>
el.tagName === "H1" || el.tagName === "H2"
|| el.querySelector("img.wide") !== null;
let seg = null;
for (const el of [...body.children]) {
if (isSeparator(el)) {
seg = null;
body.append(el);
} else {
if (!seg) {
seg = document.createElement("div");
seg.className = "colseg";
body.append(seg);
}
seg.append(el);
}
}
// Columns are per section: only segments with enough text get them,
// so a short ingress or a brief section stays single-column.
for (const s of body.querySelectorAll(".colseg")) {
s.classList.toggle("cols", s.textContent.trim().length > 600);
}
}
}
if (reduceMotion.matches) return;
for (const el of main.querySelectorAll(
"h2, h3, figure, img, pre, blockquote, table, dl, .task-list-item",
)) {
if (!el.classList.contains("reveal")) {
el.classList.add("reveal");
observer.observe(el);
}
}
}
// --- Page cache / preloading ------------------------------------------
// Articles are deliberately NOT HTTP-cacheable, so speed comes from an
// in-memory cache instead: at load (and after each swap) every visible
// internal link is fetched exactly once, and navigation is served from
// memory with no fetch at all. Editor re-renders (swapdoc.loadPlain)
// announce their fresh copies via pagerite:page-fetched, keeping the
// cache in sync after edits. The current page is NOT preloaded: we just
// received it as the document (re-fetching would be redundant, and
// browser heuristics may send it without if-none-match, defeating the
// conditional request); it enters the cache when navigated to.
const pageCache = new Map(); // pathname -> HTML text
addEventListener("pagerite:page-fetched", (ev) => {
pageCache.set(new URL(ev.detail.url, location.href).pathname, ev.detail.html);
});
function preload() {
const urls = new Set();
for (const a of document.querySelectorAll(
'#nav a[href^="/"], #sidebar a[href^="/"], #main a[href^="/"]',
)) {
urls.add(a.pathname);
}
for (const url of urls) {
if (pageCache.has(url)) continue;
// x-pagerite-preload: idle cache warm-up, not a page view — the
// server excludes these GETs from analytics (the ping sent on actual
// navigation does the counting).
fetch(url, { headers: { "x-pagerite-preload": "1" } })
.then((r) => (r.ok && (r.headers.get("content-type") || "").includes("text/html")
? r.text() : ""))
.then((html) => { if (html) pageCache.set(url, html); })
.catch(() => {});
}
}
// The path we are currently showing. location.pathname is unusable for
// this on popstate (it has already changed to the target); the editors
// signal their replaceState navigation with pagerite:preview.
let currentPath = location.pathname;
addEventListener("pagerite:preview", () => {
currentPath = location.pathname;
});
// --- Banner parallax ----------------------------------------------------
// The banner artwork stays windowed in place while its contents drift
// against the scroll. The --pry scroll parameter is also available to
// themes for their own effects (e.g. the purple sun rising faster than
// the drift). Event-driven only: perfectly still when the page is idle.
if (!reduceMotion.matches) {
let ticking = false;
const drift = () => {
ticking = false;
document.documentElement.style.setProperty(
"--pry", `${Math.min(scrollY * 0.1, 30)}px`,
);
};
addEventListener("scroll", () => {
if (!ticking) {
ticking = true;
requestAnimationFrame(drift);
}
}, { passive: true });
}
// --- Analytics pings ---------------------------------------------------
// Fire-and-forget POST /_a {fr, to, read}: on the initial page load
// (starts the visit — the server counts nothing from the document GET
// alone), for internal fetch-navigations, for external https exits, and
// on window close. ``read`` is the active time (ms) spent on ``fr``.
// Reading time pauses after 1 minute of inactivity and resumes on the
// next mouse/touch/scroll/keyboard event.
// Excluded: back/forward (popstate never pings), everything while the
// editor is open (body.editing — admin noise, not visits), and the
// analytics page itself (/_a), even though fetch-navigation treats it
// like a normal article.
// Admins (when SSO is actually in use — with no auth proxy "admin" is
// everyone's state) ping normally but with hide=1: the server then
// records nothing and scrubs any session the same browser accumulated
// before logging in, so admins never show up as visits or crawlers.
// See docs/analytics.md.
function ping(to, fr = currentPath, read = 0) {
if (document.body.classList.contains("editing")) return;
if ((to && to === "/_a") || fr === "/_a") return;
const hide = ssoAvailable && isAdmin ? 1 : 0;
const body = JSON.stringify({
fr, to, hide,
read: Math.max(0, Math.round(read / 1000)),
});
try {
fetch("/_a", {
method: "POST",
keepalive: true,
headers: { "content-type": "application/json" },
body,
});
} catch { /* analytics must never break navigation */ }
}
// Active reading time for the current page. The clock stops after 1 minute
// without activity and restarts on the next mouse/touch/scroll/keyboard
// event.
const INACTIVE_MS = 60_000;
let readStart = performance.now();
let readElapsed = 0;
let reading = true;
let readInactivityTimer = null;
let closePingedFor = null;
function markReadActivity() {
if (!reading) {
reading = true;
readStart = performance.now();
}
clearTimeout(readInactivityTimer);
readInactivityTimer = setTimeout(() => {
if (reading) {
readElapsed += performance.now() - readStart;
reading = false;
}
}, INACTIVE_MS);
}
function takeReadTime() {
if (reading) {
readElapsed += performance.now() - readStart;
readStart = performance.now();
}
const ms = Math.max(0, Math.round(readElapsed));
readElapsed = 0;
return ms;
}
function resetReadTime() {
readElapsed = 0;
reading = true;
readStart = performance.now();
clearTimeout(readInactivityTimer);
}
function sendClosePing() {
if (closePingedFor === currentPath) return;
const read = Math.max(0, Math.round(takeReadTime() / 1000));
if (read <= 0) return;
const hide = ssoAvailable && isAdmin ? 1 : 0;
const body = JSON.stringify({ fr: currentPath, hide, read });
const blob = new Blob([body], { type: "application/json" });
try {
if (navigator.sendBeacon) {
navigator.sendBeacon("/_a", blob);
} else {
fetch("/_a", {
method: "POST",
keepalive: true,
headers: { "content-type": "application/json" },
body,
});
}
} catch { /* analytics must never break navigation */ }
closePingedFor = currentPath;
}
for (const ev of ["mousemove", "mousedown", "touchstart", "touchmove", "scroll", "keydown"]) {
addEventListener(ev, markReadActivity, { passive: true });
}
addEventListener("pagehide", sendClosePing);
// The initial page load pings too — it is what starts the visit and
// counts the entry page view (the document GET alone records nothing).
// Sent once per load, after the auth probes so the admin gate applies;
// the pageshow re-probe must not ping again. Reloads are not visits:
// pinging them would double-count the view and log a self-transition.
let entryPinged = false;
function pingEntryOnce() {
if (entryPinged) return;
entryPinged = true;
const nav = performance.getEntriesByType?.("navigation")[0];
if (nav ? nav.type === "reload" : performance.navigation?.type === 1) return;
ping(currentPath);
}
// --- Analytics page mount/unmount --------------------------------------
// The analytics page is a normal page whose body is rendered by the server
// but whose content is a Vue app. In dev the entry module is imported from
// the Vite dev server on demand; in production it is inlined into the /_a
// page as script#pagerite-js-analytics, which a fetch-navigation swap does
// not execute — re-create the element so the fresh module auto-mounts on
// #analytics-app (see analytics-main.js). The module exposes its unmount
// as window.__pageriteAnalyticsUnmount.
function teardownAnalytics() {
// Remove even the server-rendered script element so a later return to
// /_a re-mounts from a fresh copy (the module has torn itself down).
document.getElementById("pagerite-js-analytics")?.remove();
window.__pageriteAnalyticsUnmount?.();
window.__pageriteAnalyticsUnmount = null;
}
async function mountAnalytics(doc) {
if (!doc.getElementById("analytics-app")) return;
// Already mounted: on a full /_a load the inline script has run.
if (document.getElementById("pagerite-js-analytics")) return;
const inline = doc.getElementById("pagerite-js-analytics");
if (inline) {
const s = document.createElement("script");
for (const a of inline.attributes) s.setAttribute(a.name, a.value);
s.textContent = inline.textContent;
document.body.append(s);
return;
}
try {
// Dev: the cached module auto-mounts only on its first evaluation,
// so call mount() explicitly for repeat visits (it no-ops when the
// app is already up).
const mod = await import(/* @vite-ignore */ assets["pagerite:analytics-src"]);
const container = document.getElementById("analytics-app");
if (container) mod.mount(container);
} catch (e) {
console.error("analytics mount failed:", e);
}
}
// --- Fetch navigation ------------------------------------------------
async function load(url, push = true, back = false) {
// Navigating with the editor open closes it; unsaved edits are lost
// (the region swap discards the previewed changes anyway).
if (document.body.classList.contains("editing")) {
editorModule?.then((m) => m.closeEditor());
}
teardownAnalytics();
let doc;
let finalUrl = url;
const cached = pageCache.get(new URL(url, location.href).pathname);
if (cached) {
doc = new DOMParser().parseFromString(cached, "text/html");
} else {
try {
const res = await fetch(url);
const type = res.headers.get("content-type") || "";
if (!res.ok || !type.includes("text/html")) throw new Error("not a page");
// Reflect any redirect the server issued.
if (res.redirected) finalUrl = res.url;
const html = await res.text();
// Populate the cache too, so returning here (back/forward, or a
// self-link in the nav) is served from memory.
pageCache.set(new URL(finalUrl, location.href).pathname, html);
doc = new DOMParser().parseFromString(html, "text/html");
} catch {
location.href = url; // fall back to a normal navigation
return false;
}
}
if (REGIONS.some((id) => !doc.getElementById(id))) {
location.href = url;
return false;
}
const doit = () => {
for (const id of REGIONS) {
const el = document.getElementById(id);
el.replaceWith(document.importNode(doc.getElementById(id), true));
}
// #sidebar is omitted entirely when the section has no
// sub-navigation, so it may be absent on either side of the swap:
// replace, insert (as #main's preceding sibling), or remove.
const oldSidebar = document.getElementById("sidebar");
const newSidebar = doc.getElementById("sidebar");
if (oldSidebar && newSidebar) {
oldSidebar.replaceWith(document.importNode(newSidebar, true));
} else if (newSidebar) {
document.getElementById("main").before(document.importNode(newSidebar, true));
} else if (oldSidebar) {
oldSidebar.remove();
}
// Stylesheets live in <head> with stable ids — links in dev, inline
// <style> elements in production — and must follow the swap: the
// analytics sheet exists on /_a only, and theme/banner/custom CSS
// may have changed since this page was loaded. Diff by id, keeping
// the fresh document's order; unchanged sheets keep their elements
// so their @keyframes are never torn down. Editor-injected sheets
// (data-pagerite, no id) and Vite's dev styles (no id) are left
// alone. Mirrors the head sync in swapdoc.js.
const sel = 'link[rel="stylesheet"][id], style[id]';
const fresh = [...doc.head.querySelectorAll(sel)];
const freshIds = new Set(fresh.map((el) => el.id));
for (const el of [...document.head.querySelectorAll(sel)]) {
if (!freshIds.has(el.id)) el.remove();
}
let anchor = null;
for (const el of fresh) {
const cur = document.getElementById(el.id);
if (cur && cur.outerHTML === el.outerHTML) {
anchor = cur;
continue;
}
const imported = document.importNode(el, true);
if (cur) cur.replaceWith(imported);
else if (anchor) anchor.after(imported);
else {
const base = document.getElementById("pagerite-base");
if (base) base.after(imported);
else document.head.append(imported);
}
anchor = imported;
}
// Custom CSS must stay last: equal-specificity :root rules (font
// variables) are decided by order, and in dev Vite injects the base
// stylesheet after the server-rendered tag.
const userStyle = document.getElementById("pagerite-user");
if (userStyle) document.head.appendChild(userStyle);
document.title = doc.title;
// Banners may contain scripts (canvas etc.), content pages may too.
runScripts(document.getElementById("page-banner"));
runScripts(document.getElementById("main"));
applyEffects();
mountAnalytics(doc);
};
// Rotating cube page transition (see the FRAGILE block in pagerite.css);
// mirrored when navigating back through history. Navigation within the
// same top-level section crossfades instead, in either direction.
if (document.startViewTransition && !reduceMotion.matches) {
const seg = (u) => new URL(u, location.href).pathname.split("/")[1];
const fade = seg(finalUrl) === seg(currentPath);
const root = document.documentElement.classList;
root.toggle("nav-fade", fade);
root.toggle("nav-back", back && !fade);
document.startViewTransition(doit).finished.finally(() => {
root.remove("nav-fade", "nav-back");
});
} else {
doit();
}
currentPath = new URL(finalUrl, location.href).pathname;
if (push) history.pushState(null, "", finalUrl);
scrollTo(0, 0);
return true;
}
addEventListener("click", (ev) => {
if (ev.defaultPrevented || ev.button !== 0
|| ev.metaKey || ev.ctrlKey || ev.shiftKey || ev.altKey) return;
// Edit buttons toggle the tabbed editor panel docked on this page: load
// the Vue app on demand (with any extra styles) and mount it in place.
// Clicking the pen of the already-open tab closes the shell; clicking
// another pen switches the shell to that tab.
const editBtn = ev.target.closest("button.edit-link");
if (editBtn && editBtn.dataset.editorSrc) {
ev.preventDefault();
const mode = editBtn.dataset.editorMode || "page";
if (document.body.classList.contains("editing")
&& document.body.dataset.editorMode === mode) {
editorModule?.then((m) => m.closeEditor());
return;
}
for (const css of (editBtn.dataset.editorCss || "").split(",")) {
if (css && !document.querySelector(`link[href="${css}"]`)) {
const link = document.createElement("link");
link.rel = "stylesheet";
link.href = css;
link.dataset.pagerite = "editor-css";
document.head.append(link);
}
}
const path = location.pathname.replace(/^\/+|\/+$/g, "");
editorModule = import(/* @vite-ignore */ editBtn.dataset.editorSrc);
editorModule
.then((m) => m.openEditor(path, { mode }))
.catch((e) => console.error("editor load failed:", e));
return;
}
const a = ev.target.closest("a[href]");
if (!a || a.target || a.hasAttribute("download")) return;
const url = new URL(a.href, location.href);
if (url.origin !== location.origin) {
// External link: the browser navigates; record the full https URL so
// different links to the same domain stay distinct in analytics.
if (url.protocol === "https:") {
closePingedFor = currentPath;
ping(url.href, currentPath, takeReadTime());
}
return;
}
// Same-page anchor links (footnotes etc.): let the browser handle them
if (url.pathname === location.pathname && url.hash) return;
// Machinery and auth endpoints are never fetch-navigated, except the
// public analytics viewer page at /_a.
if ((url.pathname.startsWith("/_") && url.pathname !== "/_a")
|| url.pathname.startsWith("/auth")) return;
ev.preventDefault();
// Capture the source now: load() updates currentPath before pinging.
const from = currentPath;
load(url).then((ok) => {
if (!ok) return;
closePingedFor = null;
ping(url.pathname, from, takeReadTime());
resetReadTime();
});
});
addEventListener("popstate", () => {
// Hash-only history entries are not navigations.
if (location.pathname === currentPath) return;
load(location.href, false, true);
});
// --- Task-list checkboxes ------------------------------------------------
// Checkboxes in the rendered article are live: toggling them edits the
// Markdown source. If the page editor is open, its CodeMirror document is
// updated directly; otherwise the server copy is toggled and saved.
async function toggleTask(checkbox, index) {
const editor = window.__pageritePageEditor;
const pagePath = editor ? editor.path() : currentPath;
const path = pagePath.replace(/^\/+|\/+$/g, "");
const originalChecked = !checkbox.checked;
try {
const body = { path, index };
if (editor) body.markdown = editor.getMarkdown();
const res = await fetch("/_api/toggle-task", {
method: "POST",
headers: { "content-type": "application/json" },
body: JSON.stringify(body),
});
if (!res.ok) {
const detail = await res.json().catch(() => ({}));
throw new Error(detail.detail || res.statusText);
}
const { markdown } = await res.json();
if (editor) editor.setMarkdown(markdown);
} catch {
checkbox.checked = originalChecked;
}
}
addEventListener("change", (ev) => {
const checkbox = ev.target.closest(".task-list-item-checkbox");
if (!checkbox) return;
const index = Number(checkbox.dataset.taskIndex);
if (Number.isNaN(index)) return;
toggleTask(checkbox, index);
});
// --- Brand shrink-to-fit ------------------------------------------------
// The themed brand size is the maximum: when the text is long or the
// viewport narrow, reduce the font size so the brand always fits the
// banner on one line. Re-run on resize, webfont load, and brand text
// edits (the site editor previews them live).
const brand = document.getElementById("brand");
if (brand) {
const fit = () => {
brand.style.fontSize = ""; // restore the themed size
const avail = brand.clientWidth;
const need = brand.scrollWidth;
if (need > avail && need > 0) {
brand.style.fontSize =
`${parseFloat(getComputedStyle(brand).fontSize) * avail / need}px`;
}
};
new ResizeObserver(fit).observe(brand);
new MutationObserver(fit).observe(brand, {
childList: true,
characterData: true,
subtree: true,
});
document.fonts?.ready.then(fit);
fit();
}
// --- Nav condense-to-fit -------------------------------------------------
// The top nav stays on one row even on too-narrow screens: first the link
// gaps shrink, then the nav's side padding, and only in extreme cases the
// font size. #nav is replaced on fetch-navigation swaps, so this re-runs
// from applyEffects (fresh elements each time); CSS keeps flex-wrap: wrap
// as the no-JS fallback.
function fitNav() {
const nav = document.getElementById("nav");
const ul = nav?.querySelector("ul");
if (!ul) return;
// Restore the themed defaults before measuring.
nav.style.fontSize = "";
nav.style.paddingInline = "";
ul.style.columnGap = "";
ul.style.flexWrap = "nowrap";
const overflow = () => ul.scrollWidth - ul.clientWidth;
if (overflow() <= 0) return;
// 1) shrink the gaps between items (down to a fifth of the themed gap)
const gap = parseFloat(getComputedStyle(ul).columnGap) || 0;
const joints = Math.max(ul.children.length - 1, 1);
if (gap > 0) {
ul.style.columnGap = `${Math.max(0.2 * gap, gap - overflow() / joints)}px`;
}
// 2) shrink the nav's side padding (down to 0.4x)
if (overflow() > 0) {
const pad = parseFloat(getComputedStyle(nav).paddingInlineStart) || 0;
nav.style.paddingInline = `${Math.max(0.4 * pad, pad - overflow() / 2)}px`;
}
// 3) shrink the font to fit what remains
if (overflow() > 0) {
const fs = parseFloat(getComputedStyle(nav).fontSize);
nav.style.fontSize = `${fs * ul.clientWidth / ul.scrollWidth}px`;
}
}
addEventListener("resize", fitNav);
document.fonts?.ready.then(fitNav);
setupAuth();
applyEffects();
mountAnalytics(document);
})();