(function () { function initDecorFloatingToc() { const holder = document.getElementById("decorFloatingToc"); const panel = document.getElementById("decorFloatingTocPanel"); const inner = document.getElementById("decorFloatingTocInner"); const fill = document.getElementById("decorFloatingTocFill"); const thumb = document.getElementById("decorFloatingTocThumb"); const article = document.getElementById("decorArticleMain"); const links = Array.from(document.querySelectorAll(".decor-floating-toc__item")); if (!holder || !panel || !inner || !fill || !thumb || !article || !links.length) return; const items = links.map(link => { const href = link.getAttribute("href"); const target = href ? document.querySelector(href) : null; return { link, target }; }).filter(item => item.target); if (!items.length) return; function syncHolderHeight() { if (window.innerWidth <= 991) { holder.style.minHeight = "0px"; return; } holder.style.minHeight = Math.max(article.offsetHeight, panel.offsetHeight) + "px"; } function moveIndicator(link) { const innerRect = inner.getBoundingClientRect(); const linkRect = link.getBoundingClientRect(); const center = (linkRect.top - innerRect.top) + (linkRect.height / 2); thumb.style.top = center + "px"; fill.style.height = center + "px"; } function setActive(item) { links.forEach(link => link.classList.remove("active")); item.link.classList.add("active"); moveIndicator(item.link); } function getCurrentItem() { const triggerY = window.innerHeight * 0.42; let current = items[0]; for (const item of items) { const rect = item.target.getBoundingClientRect(); if (rect.top <= triggerY) { current = item; } else { break; } } return current; } function updateFloatingPosition() { if (window.innerWidth <= 991) { panel.style.position = "relative"; panel.style.top = "auto"; panel.style.left = "auto"; panel.style.width = "100%"; return; } const holderRect = holder.getBoundingClientRect(); const holderTopDoc = window.scrollY + holderRect.top; const holderBottomDoc = holderTopDoc + holder.offsetHeight; const panelHeight = panel.offsetHeight; const viewportPadding = 28; const preferredTop = (window.innerHeight - panelHeight) / 2; const fixedTop = Math.max( viewportPadding, Math.min(preferredTop, window.innerHeight - panelHeight - viewportPadding) ); const desiredTopDoc = window.scrollY + fixedTop; const maxTopDoc = holderBottomDoc - panelHeight; if (desiredTopDoc <= holderTopDoc) { panel.style.position = "absolute"; panel.style.top = "0px"; panel.style.left = "0px"; panel.style.width = "100%"; } else if (desiredTopDoc >= maxTopDoc) { panel.style.position = "absolute"; panel.style.top = Math.max(0, holder.offsetHeight - panelHeight) + "px"; panel.style.left = "0px"; panel.style.width = "100%"; } else { panel.style.position = "fixed"; panel.style.top = fixedTop + "px"; panel.style.left = holderRect.left + "px"; panel.style.width = holderRect.width + "px"; } } let ticking = false; function updateAll() { syncHolderHeight(); updateFloatingPosition(); setActive(getCurrentItem()); ticking = false; } function requestUpdate() { if (!ticking) { window.requestAnimationFrame(updateAll); ticking = true; } } if (!holder.dataset.decorInit) { window.addEventListener("scroll", requestUpdate, { passive: true }); window.addEventListener("resize", requestUpdate); window.addEventListener("load", requestUpdate); links.forEach(link => { link.addEventListener("click", function () { setTimeout(requestUpdate, 180); }); }); if (document.fonts && document.fonts.ready) { document.fonts.ready.then(requestUpdate); } holder.dataset.decorInit = "true"; } requestUpdate(); } document.addEventListener("DOMContentLoaded", initDecorFloatingToc); document.body.addEventListener("experimental-flatsome-pjax-request-done", initDecorFloatingToc); })();