From f6c2ccf0cce55214a93e2755eeb93633b4f63098 Mon Sep 17 00:00:00 2001
From: LooseLi <1329307562@qq.com>
Date: Tue, 15 Apr 2025 14:45:58 +0800
Subject: [PATCH] fix: correct RightFloatArea hiding behavior when scrolling
 back to top

---
 themes/hexo/components/RightFloatArea.js | 56 +++++++++++++++---------
 1 file changed, 36 insertions(+), 20 deletions(-)

diff --git a/themes/hexo/components/RightFloatArea.js b/themes/hexo/components/RightFloatArea.js
index 162081b2..1facb110 100644
--- a/themes/hexo/components/RightFloatArea.js
+++ b/themes/hexo/components/RightFloatArea.js
@@ -1,36 +1,52 @@
-import throttle from 'lodash.throttle'
 import { useCallback, useEffect, useState } from 'react'
 import ButtonDarkModeFloat from './ButtonFloatDarkMode'
 import ButtonJumpToTop from './ButtonJumpToTop'
 
 /**
  * 悬浮在右下角的按钮，当页面向下滚动100px时会出现
+ * 当页面回到顶部时会隐藏
  * @param {*} param0
  * @returns
  */
 export default function RightFloatArea({ floatSlot }) {
   const [showFloatButton, switchShow] = useState(false)
-  const scrollListener = useCallback(
-    throttle(() => {
-      const targetRef = document.getElementById('wrapper')
-      const clientHeight = targetRef?.clientHeight
-      const scrollY = window.pageYOffset
-      const fullHeight = clientHeight - window.outerHeight
-      let per = parseFloat(((scrollY / fullHeight) * 100).toFixed(0))
-      if (per > 100) per = 100
-      const shouldShow = scrollY > 100 && per > 0
 
-      // 右下角显示悬浮按钮
-      if (shouldShow !== showFloatButton) {
-        switchShow(shouldShow)
-      }
-    }, 200)
-  )
+  const scrollListener = useCallback(() => {
+    const targetRef = document.getElementById('wrapper') || document.documentElement
+    const clientHeight = targetRef?.clientHeight || 0
+    const scrollY = window.pageYOffset || document.documentElement.scrollTop || 0
+    const viewportHeight = window.innerHeight || document.documentElement.clientHeight || 0
+    
+    const fullHeight = Math.max(1, clientHeight - viewportHeight)
+    
+    let per = parseFloat(((scrollY / fullHeight) * 100).toFixed(0))
+    
+    // 完整的边界处理
+    if (isNaN(per) || per < 0) per = 0
+    if (per > 100) per = 100
+    
+    const shouldShow = scrollY > 100 && per > 0
+
+    // 右下角显示悬浮按钮
+    if (shouldShow !== showFloatButton) {
+      switchShow(shouldShow)
+    }
+  }, [showFloatButton])
 
   useEffect(() => {
-    document.addEventListener('scroll', scrollListener)
-    return () => document.removeEventListener('scroll', scrollListener)
-  }, [])
+    const throttledScroll = () => {
+      window.requestAnimationFrame(() => {
+        scrollListener()
+      })
+    }
+    
+    window.addEventListener('scroll', throttledScroll)
+    
+    // 初始调用一次检查初始状态
+    scrollListener()
+    
+    return () => window.removeEventListener('scroll', throttledScroll)
+  }, [scrollListener])
 
   return (
     <div
@@ -39,7 +55,7 @@ export default function RightFloatArea({ floatSlot }) {
         '  duration-300 transition-all bottom-12 right-1 fixed justify-end z-20  text-white bg-indigo-500 dark:bg-hexo-black-gray rounded-sm'
       }>
       <div
-        className={'justify-center  flex flex-col items-center cursor-pointer'}>
+        className={'justify-center flex flex-col items-center cursor-pointer'}>
         <ButtonDarkModeFloat />
         {floatSlot}
         <ButtonJumpToTop />