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import throttle from 'lodash.throttle'
import { useCallback, useEffect, useState } from 'react'
import FloatDarkModeButton from './FloatDarkModeButton'
import JumpToTopButton from './JumpToTopButton'
/**
* 悬浮在右下角的按钮，当页面向下滚动100px时会出现
* @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))
useEffect(() => {
document.addEventListener('scroll', scrollListener)
return () => document.removeEventListener('scroll', scrollListener)
}, [])
return (
<div className={(showFloatButton ? 'opacity-100 ' : 'invisible opacity-0') + ' 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'}>
<FloatDarkModeButton />
{floatSlot}
<JumpToTopButton />
</div>
</div>
)
}
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