(function () {
	let rtocList = [];
	let lastScrollY = 0;
	let lastBodyClientHeight = 0;
	let sidebar_rtoc_wrapper = document.querySelector('.sidebar #rtoc-mokuji-widget-wrapper');
	if (!sidebar_rtoc_wrapper) {
		sidebar_rtoc_wrapper = document.querySelector('.widget #rtoc-mokuji-widget-wrapper');
	}
	if (!sidebar_rtoc_wrapper) {
		sidebar_rtoc_wrapper = document.querySelector('.c-widget #rtoc-mokuji-widget-wrapper');
	}
	if (!sidebar_rtoc_wrapper) {
		sidebar_rtoc_wrapper = document.querySelector('#scrollad #rtoc-mokuji-widget-wrapper');
	}
	if (!sidebar_rtoc_wrapper) {
		sidebar_rtoc_wrapper = document.querySelector('#sideBarTracking #rtoc-mokuji-widget-wrapper');
	}
	if (!sidebar_rtoc_wrapper) {
		sidebar_rtoc_wrapper = document.querySelector('#sidebar1 #rtoc-mokuji-widget-wrapper');
	}
	if (sidebar_rtoc_wrapper) {
		sidebar_rtoc_wrapper.classList.add('rtoc-sidebar-contents');
	}
	function rtoc_init() {
		rtocList = [];
		rtocParentList = [];
		if (sidebar_rtoc_wrapper) {
			const itemList = sidebar_rtoc_wrapper.querySelectorAll('a');
			const itemAllList = sidebar_rtoc_wrapper.querySelectorAll('.level-1 > .rtoc-item > a');
			for (let i = 0; i < itemList.length; i++) {
				const a = itemList[i];
				const linkAnker = a.href.substring(a.href.lastIndexOf('#'));
				const itemElement = document.querySelector(decodeURI(linkAnker));
				if (itemElement != null) {
					let top = itemElement.offsetTop;
					let parent = itemElement.offsetParent;
					while (parent != null) {
						top += parent.offsetTop;
						parent = parent.offsetParent;
					}
					rtocList.push({ top: top, bottom: 1e30, itemdom: a.parentElement });
					if (i > 0) {
						if (rtocList[i]) {
							rtocList[i - 1].bottom = rtocList[i].top;
						}
					}
				}
			}
			for (let i = 0; i < itemAllList.length; i++) {
				const a = itemAllList[i];
				const linkAnker = a.href.substring(a.href.lastIndexOf('#'));
				const itemAllElement = document.querySelector(decodeURI(linkAnker));
				let top = itemAllElement.offsetTop;
				let parent = itemAllElement.offsetParent;
				while (parent != null) {
					top += parent.offsetTop;
					parent = parent.offsetParent;
				}
				rtocParentList.push({ top: top, bottom: 1e30, itemdom: a.parentElement });
				if (i > 0) {
					rtocParentList[i - 1].bottom = rtocParentList[i].top;
				}
			}
		}
	}
	rtoc_init();
	function rtocUpdateSection(scrollY) {
		if (document.body.clientHeight !== lastBodyClientHeight) {
			rtoc_init();
		}
		for (let sec of rtocList) {
			sec.itemdom.classList.remove('rtoc-current');
		}
		for (let sec of rtocParentList) {
			sec.itemdom.classList.remove('rtoc-show');
		}

		for (let i = 0; i < rtocList.length; i++) {
			const sec = rtocList[i];
			if (sec.top <= scrollY && scrollY < sec.bottom) {
				sec.itemdom.classList.add('rtoc-current');
				break;
			}
		}
		for (let i = 0; i < rtocParentList.length; i++) {
			const sec = rtocParentList[i];
			if (sec.top <= scrollY && scrollY < sec.bottom) {
				sec.itemdom.classList.add('rtoc-show');
				break;
			}
		}
	}
	function widgetScroll(hiddenDOM) {
		const highlightContents = sidebar_rtoc_wrapper.querySelector('.rtoc-current');
	}
	if(sidebar_rtoc_wrapper){
		let ticking = false;
		const scrollHeight = sidebar_rtoc_wrapper.querySelector('.rtoc-mokuji').scrollHeight;
		const displayHeight = sidebar_rtoc_wrapper.querySelector('.rtoc-mokuji').offsetHeight;
		document.addEventListener('scroll', function () {
			lastScrollY = window.scrollY;
			if (ticking === false) {
				window.requestAnimationFrame(function () {
					rtocUpdateSection(lastScrollY + 300);
					ticking = false;
				});
				ticking = true;
			}
			if (scrollHeight > displayHeight) {
				widgetScroll(scrollHeight - displayHeight);
			}
		});
	}
})();