feat: 阅读进度

src/components/icons/Progress.tsx

@@ -0,0 +1,21 @@
+export function MaterialSymbolsProgressActivity(props: { progress: number }) {
+  const offset = 87.92 * ((100 - props.progress) / 100);
+
+  return (
+    <svg style={{ transform: 'rotate(-90deg)' }} width="1em" height="1em" viewBox="0 0 36 36">
+      {/* 第一圈 */}
+      <circle r="14" cx="18" cy="18" fill="transparent" stroke="#e0e0e0" strokeWidth="4"></circle>
+      {/* 第二圈，进度条 */}
+      <circle
+        r="14"
+        cx="18"
+        cy="18"
+        fill="transparent"
+        stroke="var(--accent-color)"
+        strokeWidth="4"
+        strokeDasharray="87.92"
+        strokeDashoffset={`${offset}`}
+      ></circle>
+    </svg>
+  );
+}

src/components/modules/shared/ArticleRightAside.tsx

@@ -2,6 +2,7 @@ import React from 'react';
 import { PropsWithChildren } from 'react';
 
 import { TocAside } from '../toc/TocAside';
+import { ReadIndicator } from './ReadIndicator';
 
 export const ArticleRightAside = ({ children }: PropsWithChildren) => {
   return (
@@ -11,6 +12,7 @@ export const ArticleRightAside = ({ children }: PropsWithChildren) => {
           as="div"
           className="static ml-4"
           treeClassName="absolute h-full min-h-[120px] flex flex-col"
+          accessory={<ReadIndicator />}
         />
       </div>
       {!!children &&

src/components/modules/shared/ReadIndicator.tsx

@@ -0,0 +1,55 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+
+import { MaterialSymbolsProgressActivity } from '@/components/icons/Progress';
+import { MotionButtonBase } from '@/components/ui/button';
+import { cn } from '@/lib/helper';
+import { springScrollToTop } from '@/lib/scroller';
+import { useMainArticleStore } from '@/store/mainArticleStore';
+
+export const ReadIndicator = () => {
+  const { Element } = useMainArticleStore();
+  const [readPercent, setReadPercent] = useState(0);
+
+  useEffect(() => {
+    const handleScroll = () => {
+      if (!Element) return;
+
+      const elementTop = Element.getBoundingClientRect().top + window.scrollY;
+      const scrollTop = window.scrollY;
+      const winHeight = window.innerHeight;
+      const elementHeight = Element.offsetHeight;
+      // 为了解决一开始进度不为0的问题
+      const readHeight = scrollTop > winHeight ? scrollTop + winHeight - elementTop : scrollTop;
+      const scrollPosition = (readHeight / elementHeight) * 100;
+      setReadPercent(Math.floor(Math.min(Math.max(0, scrollPosition), 100)));
+    };
+
+    window.addEventListener('scroll', handleScroll);
+    handleScroll();
+
+    return () => {
+      window.removeEventListener('scroll', handleScroll);
+    };
+  }, [Element]);
+
+  return (
+    <div className="text-gray-800 dark:text-neutral-300">
+      <div className="flex items-center gap-2">
+        <MaterialSymbolsProgressActivity progress={readPercent} />
+        {readPercent}%<br />
+      </div>
+      <MotionButtonBase
+        onClick={springScrollToTop}
+        className={cn(
+          'mt-1 flex flex-nowrap items-center gap-2 opacity-50 transition-all duration-500 hover:opacity-100',
+          readPercent > 10 ? '' : 'pointer-events-none opacity-0',
+        )}
+      >
+        <i className="i-mingcute-arrow-up-circle-line" />
+        <span className="whitespace-nowrap">回到顶部</span>
+      </MotionButtonBase>
+    </div>
+  );
+};

src/components/modules/toc/TocAside.tsx

@@ -11,7 +11,7 @@ import { useMainArticleStore } from '@/store/mainArticleStore';
 
 export type TocAsideProps = {
   treeClassName?: string;
-  accessory?: React.ReactNode | React.FC;
+  accessory?: React.ReactNode;
   as?: React.ElementType;
   className?: string;
 };
@@ -21,6 +21,7 @@ export const TocAside = ({
   children,
   treeClassName,
   as: As = 'aside',
+  accessory,
 }: TocAsideProps & PropsWithChildren) => {
   const containerRef = useRef<HTMLUListElement>(null);
   const $article = useMainArticleStore(useShallow((state) => state.Element));
@@ -62,6 +63,7 @@ export const TocAside = ({
         $headings={$headings}
         containerRef={containerRef}
         className={cn('absolute max-h-[75vh]', treeClassName)}
+        accessory={accessory}
       />
       {children}
     </As>

src/components/ui/divider/index.tsx

@@ -28,9 +28,7 @@ export const DividerVertical: FC<
         className,
       )}
       {...rest}
-    >
-      w
-    </span>
+    ></span>
   );
 };