dify

dify/web/app/components/base/theme-selector.tsx

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+'use client'
+
+import { useState } from 'react'
+import {
+  RiCheckLine,
+  RiComputerLine,
+  RiMoonLine,
+  RiSunLine,
+} from '@remixicon/react'
+import { useTranslation } from 'react-i18next'
+import { useTheme } from 'next-themes'
+import ActionButton from '@/app/components/base/action-button'
+import {
+  PortalToFollowElem,
+  PortalToFollowElemContent,
+  PortalToFollowElemTrigger,
+} from '@/app/components/base/portal-to-follow-elem'
+
+export type Theme = 'light' | 'dark' | 'system'
+
+export default function ThemeSelector() {
+  const { t } = useTranslation()
+  const { theme, setTheme } = useTheme()
+  const [open, setOpen] = useState(false)
+
+  const handleThemeChange = (newTheme: Theme) => {
+    setTheme(newTheme)
+    setOpen(false)
+  }
+
+  const getCurrentIcon = () => {
+    switch (theme) {
+      case 'light': return <RiSunLine className='h-4 w-4 text-text-tertiary' />
+      case 'dark': return <RiMoonLine className='h-4 w-4 text-text-tertiary' />
+      default: return <RiComputerLine className='h-4 w-4 text-text-tertiary' />
+    }
+  }
+
+  return (
+    <PortalToFollowElem
+      open={open}
+      onOpenChange={setOpen}
+      placement='bottom-end'
+      offset={{ mainAxis: 6 }}
+    >
+      <PortalToFollowElemTrigger
+        onClick={() => setOpen(!open)}
+      >
+        <ActionButton
+          className={`h-8 w-8 p-[6px] ${open && 'bg-state-base-hover'}`}
+        >
+          {getCurrentIcon()}
+        </ActionButton>
+      </PortalToFollowElemTrigger>
+      <PortalToFollowElemContent className='z-[1000]'>
+        <div className='flex w-[144px] flex-col items-start rounded-xl border-[0.5px] border-components-panel-border bg-components-panel-bg-blur p-1 shadow-lg'>
+          <button type="button"
+            className='flex w-full items-center gap-1 rounded-lg px-2 py-1.5 text-text-secondary hover:bg-state-base-hover'
+            onClick={() => handleThemeChange('light')}
+          >
+            <RiSunLine className='h-4 w-4 text-text-tertiary' />
+            <div className='flex grow items-center justify-start px-1'>
+              <span className='system-md-regular'>{t('common.theme.light')}</span>
+            </div>
+            {theme === 'light' && <div className='flex h-4 w-4 shrink-0 items-center justify-center'>
+              <RiCheckLine className='h-4 w-4 text-text-accent' />
+            </div>}
+          </button>
+          <button type="button"
+            className='flex w-full items-center gap-1 rounded-lg px-2 py-1.5 text-text-secondary hover:bg-state-base-hover'
+            onClick={() => handleThemeChange('dark')}
+          >
+            <RiMoonLine className='h-4 w-4 text-text-tertiary' />
+            <div className='flex grow items-center justify-start px-1'>
+              <span className='system-md-regular'>{t('common.theme.dark')}</span>
+            </div>
+            {theme === 'dark' && <div className='flex h-4 w-4 shrink-0 items-center justify-center'>
+              <RiCheckLine className='h-4 w-4 text-text-accent' />
+            </div>}
+          </button>
+          <button type="button"
+            className='flex w-full items-center gap-1 rounded-lg px-2 py-1.5 text-text-secondary hover:bg-state-base-hover'
+            onClick={() => handleThemeChange('system')}
+          >
+            <RiComputerLine className='h-4 w-4 text-text-tertiary' />
+            <div className='flex grow items-center justify-start px-1'>
+              <span className='system-md-regular'>{t('common.theme.auto')}</span>
+            </div>
+            {theme === 'system' && <div className='flex h-4 w-4 shrink-0 items-center justify-center'>
+              <RiCheckLine className='h-4 w-4 text-text-accent' />
+            </div>}
+          </button>
+        </div>
+      </PortalToFollowElemContent>
+    </PortalToFollowElem>
+  )
+}