refactor: v2.0 全量重构 — TypeScript + React + Zustand + IndexedDB
技术栈升级： - JavaScript → TypeScript 5.6（全量类型安全） - 原生 DOM → React 18（函数组件 + Hooks） - 全局变量 → Zustand 5（轻量状态管理） - localStorage → IndexedDB / Dexie.js 4（大容量、异步、索引） - marked.js → unified / remark / rehype（插件化渲染管线） - 无打包 → electron-vite 3（HMR 热更新） - 纯 CSS → CSS Variables + CSS Modules 新增功能： - 标签页状态 IndexedDB 持久化（关闭后可恢复） - 最近打开文件列表 - 大文件虚拟化行号（>2000 行） - 搜索高亮二分查找优化 O(log N) - rehype-sanitize HTML 安全过滤 文件结构： - 7 个源文件 → 51 个模块化文件 - src/main/ 主进程（6 文件） - src/preload/ 预加载（1 文件） - src/renderer/ 渲染进程（42 文件：组件/hooks/stores/lib/db/types/styles） - src/shared/ 共享类型（2 文件） 构建验证： - TypeScript 检查零错误 - electron-vite build 成功 - 产物：main 15kB + preload 2kB + renderer 1.5MB
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import React, { useCallback, useRef, useEffect } from 'react'
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import { useSearchStore } from '../../stores/searchStore'
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import { useTabStore } from '../../stores/tabStore'
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import { findMatches } from '../../lib/searchEngine'
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export function SearchBar() {
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const searchInputRef = useRef<HTMLInputElement>(null)
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const isVisible = useSearchStore(s => s.isVisible)
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const showReplace = useSearchStore(s => s.showReplace)
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const searchText = useSearchStore(s => s.searchText)
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const replaceText = useSearchStore(s => s.replaceText)
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const matches = useSearchStore(s => s.matches)
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const currentIndex = useSearchStore(s => s.currentIndex)
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const options = useSearchStore(s => s.options)
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const setSearchText = useSearchStore(s => s.setSearchText)
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const setReplaceText = useSearchStore(s => s.setReplaceText)
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const setShowReplace = useSearchStore(s => s.setShowReplace)
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const setMatches = useSearchStore(s => s.setMatches)
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const findNext = useSearchStore(s => s.findNext)
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const findPrev = useSearchStore(s => s.findPrev)
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const toggleCaseSensitive = useSearchStore(s => s.toggleCaseSensitive)
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const toggleRegex = useSearchStore(s => s.toggleRegex)
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const close = useSearchStore(s => s.close)
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const getActiveTab = useTabStore(s => s.getActiveTab)
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// 执行搜索
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const doSearch = useCallback((text: string) => {
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const tab = getActiveTab()
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if (!tab || !text) {
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setMatches([])
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return
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}
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const found = findMatches(tab.content, text, options)
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setMatches(found)
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}, [getActiveTab, options, setMatches])
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// 搜索文本变化
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const handleSearchChange = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
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const text = e.target.value
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setSearchText(text)
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doSearch(text)
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}, [setSearchText, doSearch])
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// 替换当前
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const handleReplaceCurrent = useCallback(() => {
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const tab = getActiveTab()
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if (!tab || matches.length === 0 || currentIndex < 0) return
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const m = matches[currentIndex]
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const newContent = tab.content.substring(0, m.start) + replaceText + tab.content.substring(m.end)
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useTabStore.getState().updateTabContent(tab.id, newContent)
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// 重新搜索
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doSearch(searchText)
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}, [getActiveTab, matches, currentIndex, replaceText, searchText, doSearch])
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// 全部替换
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const handleReplaceAll = useCallback(() => {
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const tab = getActiveTab()
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if (!tab || matches.length === 0) return
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let result = ''
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let lastEnd = 0
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for (let i = matches.length - 1; i >= 0; i--) {
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const m = matches[i]
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result = tab.content.substring(lastEnd, m.start) + replaceText + result
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lastEnd = m.end
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}
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result = tab.content.substring(0, matches[0].start) + result
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useTabStore.getState().updateTabContent(tab.id, result)
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doSearch(searchText)
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}, [getActiveTab, matches, replaceText, searchText, doSearch])
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// 打开时聚焦
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useEffect(() => {
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if (isVisible && searchInputRef.current) {
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searchInputRef.current.focus()
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}
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}, [isVisible])
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if (!isVisible) return null
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return (
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<div id="search-bar">
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<div className="search-row">
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<button
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id="btn-toggle-replace"
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className={`search-opt-btn ${showReplace ? 'expanded' : ''}`}
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onClick={() => setShowReplace(!showReplace)}
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title="展开替换行"
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>
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▾
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</button>
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<input
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ref={searchInputRef}
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type="text"
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id="search-input"
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placeholder="查找..."
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value={searchText}
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onChange={handleSearchChange}
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onKeyDown={(e) => {
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if (e.key === 'Enter') {
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e.preventDefault()
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e.shiftKey ? findPrev() : findNext()
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}
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if (e.key === 'Escape') {
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e.preventDefault()
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close()
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}
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}}
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/>
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<span id="search-count">
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{matches.length > 0 ? `${currentIndex + 1}/${matches.length}` : searchText ? '无结果' : ''}
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</span>
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<button
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className={`search-opt-btn ${options.caseSensitive ? 'active' : ''}`}
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onClick={toggleCaseSensitive}
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title="区分大小写 (Alt+C)"
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>
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Aa
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</button>
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<button
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className={`search-opt-btn ${options.useRegex ? 'active' : ''}`}
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onClick={toggleRegex}
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title="正则表达式 (Alt+R)"
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>
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.*
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</button>
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<button className="search-nav-btn" onClick={findPrev} title="上一个 (Shift+Enter)">
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<svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
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<polyline points="18 15 12 9 6 15" />
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</svg>
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</button>
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<button className="search-nav-btn" onClick={findNext} title="下一个 (Enter)">
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<svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2.5">
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<polyline points="6 9 12 15 18 9" />
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</svg>
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</button>
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<button className="search-nav-btn" onClick={close} title="关闭 (Escape)">✕</button>
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</div>
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{showReplace && (
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<div id="replace-row">
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<input
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type="text"
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id="replace-input"
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placeholder="替换..."
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value={replaceText}
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onChange={(e) => setReplaceText(e.target.value)}
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/>
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<button className="replace-btn" onClick={handleReplaceCurrent} title="替换 (Ctrl+Shift+G)">替换</button>
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<button className="replace-btn" onClick={handleReplaceAll} title="全部替换 (Ctrl+Shift+H)">全部</button>
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</div>
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)}
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</div>
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)
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}
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