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(() => {
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const textSelectors = 'p, h1, h2, h3, h4, h5, h6, span, li, label, td, th, pre, .code';
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const linkSelectors = 'a, button, [role="button"], input[type="submit"], input[type="button"]';
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const padding = 6;
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let ac = null;
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let sig = null;
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let mouseX = 0, mouseY = 0;
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let currentLinkEl = null;
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let rafId = null;
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let cursor = null;
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let cursorVisible = false;
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let lastTouchTime = 0;
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let isMouseDown = false;
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const TOUCH_MOUSE_GUARD_MS = 800;
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window.__scriptCleanup = () => {
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if (ac) ac.abort();
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if (rafId) { cancelAnimationFrame(rafId); rafId = null; }
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document.documentElement.style.cursor = '';
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if (cursor) cursor.classList.remove('visible', 'on-link', 'on-text');
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cursorVisible = false;
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currentLinkEl = null;
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};
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function showCursor() {
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if (!cursorVisible && cursor) {
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cursorVisible = true;
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cursor.classList.add('visible');
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}
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}
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function hideCursor() {
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if (cursor) {
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cursorVisible = false;
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cursor.classList.remove('visible');
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currentLinkEl = null;
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if (rafId) { cancelAnimationFrame(rafId); rafId = null; }
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cursor.classList.remove('on-link', 'on-text');
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}
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}
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function isSyntheticMouse() {
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return Date.now() - lastTouchTime < TOUCH_MOUSE_GUARD_MS;
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}
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function updateCursorForLink(el) {
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const rect = el.getBoundingClientRect();
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cursor.classList.remove('on-text');
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cursor.classList.add('on-link');
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cursor.style.transform = 'none';
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cursor.style.left = (rect.left - padding) + 'px';
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cursor.style.top = (rect.top - padding) + 'px';
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cursor.style.width = (rect.width + padding * 2) + 'px';
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cursor.style.height = (rect.height + padding * 2) + 'px';
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}
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function trackLink() {
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if (currentLinkEl) {
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updateCursorForLink(currentLinkEl);
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rafId = requestAnimationFrame(trackLink);
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}
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}
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document.documentElement.style.cursor = 'none';
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function init() {
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ac = new AbortController();
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sig = ac.signal;
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cursor = document.getElementById('cursor');
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if (!cursor) return;
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document.addEventListener('touchstart', () => { lastTouchTime = Date.now(); hideCursor(); }, { passive: true, signal: sig });
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document.addEventListener('touchmove', () => { lastTouchTime = Date.now(); hideCursor(); }, { passive: true, signal: sig });
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document.addEventListener('touchend', () => { lastTouchTime = Date.now(); }, { passive: true, signal: sig });
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document.addEventListener('mousemove', (e) => {
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if (isSyntheticMouse()) return;
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if (e.sourceCapabilities && e.sourceCapabilities.firesTouchEvents) return;
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mouseX = e.clientX;
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mouseY = e.clientY;
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showCursor();
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const el = document.elementFromPoint(mouseX, mouseY);
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const linkEl = el ? el.closest(linkSelectors) : null;
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if (linkEl) {
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if (currentLinkEl !== linkEl) {
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currentLinkEl = linkEl;
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if (rafId) cancelAnimationFrame(rafId);
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rafId = requestAnimationFrame(trackLink);
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}
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} else {
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if (currentLinkEl) {
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currentLinkEl = null;
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if (rafId) { cancelAnimationFrame(rafId); rafId = null; }
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}
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cursor.classList.remove('on-link');
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cursor.style.transform = isMouseDown ? 'translate(-50%, -50%) scale(0.9)' : 'translate(-50%, -50%)';
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cursor.style.left = mouseX + 'px';
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cursor.style.top = mouseY + 'px';
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cursor.style.width = '';
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cursor.style.height = '';
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if (el && el.closest(textSelectors)) {
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cursor.classList.add('on-text');
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} else {
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cursor.classList.remove('on-text');
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}
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}
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}, { signal: sig });
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document.addEventListener('mousedown', () => {
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isMouseDown = true;
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cursor.style.transform = currentLinkEl ? 'none' : 'translate(-50%, -50%) scale(0.9)';
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}, { signal: sig });
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document.addEventListener('mouseup', () => {
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isMouseDown = false;
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cursor.style.transform = currentLinkEl ? 'none' : 'translate(-50%, -50%) scale(1)';
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}, { signal: sig });
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window.addEventListener('scroll', () => {
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if (currentLinkEl) updateCursorForLink(currentLinkEl);
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}, { passive: true, signal: sig });
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}
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if (document.readyState === 'loading') {
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document.addEventListener('DOMContentLoaded', init, { signal: sig });
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} else {
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init();
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}
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function preloadAssets(newDoc) {
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const curStyleHrefs = new Set(
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[...document.head.querySelectorAll('link[rel="stylesheet"]')].map(l => l.href)
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);
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const curScriptSrcs = new Set(
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[...document.head.querySelectorAll('script[src]')].map(s => s.src)
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);
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const tasks = [];
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[...newDoc.head.querySelectorAll('link[rel="stylesheet"]')]
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.filter(l => !curStyleHrefs.has(new URL(l.href, location.href).href))
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.forEach(link => tasks.push(new Promise(resolve => {
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const l = link.cloneNode(true);
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l.addEventListener('load', resolve, { once: true });
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l.addEventListener('error', resolve, { once: true });
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document.head.appendChild(l);
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})));
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[...newDoc.head.querySelectorAll('script[src]')]
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.filter(s => !curScriptSrcs.has(new URL(s.src, location.href).href))
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.forEach(script => tasks.push(new Promise(resolve => {
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const s = document.createElement('script');
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[...script.attributes].forEach(a => s.setAttribute(a.name, a.value));
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s.addEventListener('load', resolve, { once: true });
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s.addEventListener('error', resolve, { once: true });
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document.head.appendChild(s);
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})));
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return Promise.all(tasks);
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}
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function updateHead(newDoc) {
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const head = document.head;
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const newHead = newDoc.head;
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const t = newHead.querySelector('title');
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if (t) document.title = t.textContent;
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const META_KEEP = new Set(['charset', 'viewport', 'color-scheme', 'theme-color']);
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head.querySelectorAll('meta').forEach(m => {
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const key = m.getAttribute('name') || m.getAttribute('property');
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if (!key || META_KEEP.has(key)) return;
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m.remove();
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});
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const insertRef = head.querySelector(
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'link[rel="preconnect"], link[rel="stylesheet"], link[rel="manifest"], link[rel="icon"], script'
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);
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newHead.querySelectorAll('meta[name], meta[property]').forEach(m => {
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const key = m.getAttribute('name') || m.getAttribute('property');
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if (!META_KEEP.has(key)) head.insertBefore(m.cloneNode(true), insertRef);
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});
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const nc = newHead.querySelector('link[rel="canonical"]');
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const cc = head.querySelector('link[rel="canonical"]');
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if (nc && cc) cc.href = nc.href;
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const newStyleHrefs = new Set(
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[...newHead.querySelectorAll('link[rel="stylesheet"]')]
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.map(l => new URL(l.href, location.href).href)
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);
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head.querySelectorAll('link[rel="stylesheet"]').forEach(l => {
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if (!newStyleHrefs.has(l.href)) l.remove();
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});
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const newScriptSrcs = new Set(
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[...newHead.querySelectorAll('script[src]')]
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.map(s => new URL(s.src, location.href).href)
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);
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head.querySelectorAll('script[src]').forEach(s => {
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if (!newScriptSrcs.has(s.src)) s.remove();
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});
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head.querySelectorAll('style').forEach(s => s.remove());
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newHead.querySelectorAll('style').forEach(s => head.appendChild(s.cloneNode(true)));
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}
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if (document.startViewTransition) {
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document.addEventListener('click', (event) => {
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const link = event.target.closest('a');
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if (!link || link.hasAttribute('download')) return;
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const url = new URL(link.href, location.href);
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if (url.origin !== location.origin) return;
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if (link.target || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) return;
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if (url.hash && url.pathname === location.pathname) {
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event.preventDefault();
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const target = document.querySelector(url.hash);
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if (target) {
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target.scrollIntoView({ behavior: 'smooth', block: 'start' });
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history.pushState(null, '', url.hash);
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}
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return;
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}
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event.preventDefault();
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document.startViewTransition(async () => {
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const response = await fetch(url.href, {
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headers: { 'X-Requested-With': 'view-transition' }
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});
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const html = await response.text();
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const doc = new DOMParser().parseFromString(html, 'text/html');
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if (typeof window.__scriptCleanup === 'function') {
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window.__scriptCleanup();
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window.__scriptCleanup = null;
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}
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await preloadAssets(doc);
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updateHead(doc);
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for (const tag of ['header', 'main', 'footer']) {
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const newEl = doc.querySelector(tag);
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const curEl = document.querySelector(tag);
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if (!newEl || !curEl) { location.href = url.href; return; }
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curEl.innerHTML = newEl.innerHTML;
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curEl.querySelectorAll('script').forEach(old => {
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const s = document.createElement('script');
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[...old.attributes].forEach(a => s.setAttribute(a.name, a.value));
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s.textContent = old.textContent;
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old.replaceWith(s);
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});
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}
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history.pushState(null, '', url.href);
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if (cursor) {
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currentLinkEl = null;
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if (rafId) { cancelAnimationFrame(rafId); rafId = null; }
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cursor.classList.remove('on-link', 'on-text');
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cursor.style.transform = 'translate(-50%, -50%)';
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cursor.style.left = mouseX + 'px';
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cursor.style.top = mouseY + 'px';
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cursor.style.width = '';
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cursor.style.height = '';
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const el = document.elementFromPoint(mouseX, mouseY);
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const newLinkEl = el ? el.closest(linkSelectors) : null;
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if (newLinkEl) {
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currentLinkEl = newLinkEl;
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rafId = requestAnimationFrame(trackLink);
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} else if (el && el.closest(textSelectors)) {
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cursor.classList.add('on-text');
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}
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}
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init();
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});
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});
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window.addEventListener('popstate', () => location.reload());
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}
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})();
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