fix: v0.2.5 一致性与边角修复 - 右键菜单边缘防溢出、粘贴10MB防护、拖拽失败提示、多文件提示、剪贴板走主进程IPC、主进程异步读取

README.md

@@ -19,7 +19,7 @@ DiffLens 是一款跨平台桌面文本对比工具，帮助你快速定位两
 - **二进制文件预警**：疑似二进制内容给出乱码提示，避免误读为差异
 - **差异统计徽章**：实时统计新增 / 删除 / 修改行数
 - **导出一键报告**：将对比结果导出为 HTML / 纯文本 / Markdown 三种格式，便于分享与归档
-- **拖拽与菜单双入口**：支持文件拖拽导入，也支持顶部菜单与快捷键打开
+- **拖拽与按钮双入口**：支持文件拖拽导入，也可通过界面按钮选择文件或粘贴文本
 - **滚动联动**：左右两个面板滚动位置自动同步
 
 ---
@@ -90,7 +90,7 @@ src/
 - 作者：thzxx
 - 组织：MetonaTeam
 - 许可证：MIT License（见 [LICENSE](./LICENSE)）
-- 版本：0.2.4
+- 版本：0.2.5
 
 ---
 

docs/应用开发与版本迭代规范.md

@@ -20,7 +20,7 @@ z = 补丁版本号（Patch）
 > **`x` 永远是 `0`，永远不要提升到 `1.0.0`。**
 > 版本迭代**只允许修改 `y` 和 `z`**，`x` 保持 `0` 不变。
 
-当前基线版本：**`0.2.4`**
+当前基线版本：**`0.2.5`**
 
 ---
 
@@ -60,7 +60,8 @@ z = 补丁版本号（Patch）
 0.2.1   ← 建立测试体系（已发布）：Vitest 单元+组件测试 · 测试策略文档
 0.2.2   ← 体验打磨（已发布）：拖拽处处可用 · 手动粘贴对比 · 导出后一键定位 · 报告/可读性增强 · 仅限文本文件
 0.2.3   ← 安装器优化（已发布）：NSIS 向导式安装，支持手动选择安装目录
-0.2.4   ← 健壮性与体验打磨（当前）：读取容错与 10MB 大文件防护 · 横向滚动同步 · 下拉点击外部/Esc 关闭 · 二进制误判预警
+0.2.4   ← 健壮性与体验打磨（已发布）：读取容错与 10MB 大文件防护 · 横向滚动同步 · 下拉点击外部/Esc 关闭 · 二进制误判预警
+0.2.5   ← 一致性与边角修复（当前）：右键菜单边缘防溢出 · 粘贴入口 10MB 防护 · 拖拽读取失败提示 · 多文件拖拽提示 · 剪贴板统一走主进程 · 主进程异步读取
 0.3.0   ← 新增功能
 ...
 0.y.z   ← 长期停留，永不进入 1.x

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "DiffLens",
-  "version": "0.2.4",
+  "version": "0.2.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "DiffLens",
-      "version": "0.2.4",
+      "version": "0.2.5",
       "license": "MIT",
       "dependencies": {
         "@electron-toolkit/preload": "^3.0.1",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "DiffLens",
-  "version": "0.2.4",
+  "version": "0.2.5",
   "description": "DiffLens — 精美酷炫的文本对比桌面应用",
   "author": "thzxx",
   "license": "MIT",

src/main/index.ts

@@ -102,11 +102,11 @@ ipcMain.handle('file:open', async (_event, side: 'left' | 'right' | null) => {
   const name = filePath.split(/[\\/]/).pop() ?? filePath
   let buf: Buffer
   try {
-    const stat = fs.statSync(filePath)
+    const stat = await fs.promises.stat(filePath)
     if (stat.size > MAX_FILE_SIZE) {
       return { error: 'too-large', name, size: stat.size }
     }
-    buf = fs.readFileSync(filePath)
+    buf = await fs.promises.readFile(filePath)
   } catch {
     return { error: 'read-failed', name }
   }

src/renderer/src/App.tsx

@@ -8,7 +8,7 @@ import {
   type MouseEvent as ReactMouseEvent
 } from 'react'
 import { computeDiff } from './diff/diffEngine'
-import type { DiffResult, DiffSummary } from './diff/diffEngine'
+import type { DiffOptions, DiffResult, DiffSummary } from './diff/diffEngine'
 import DiffView from './components/DiffView'
 import Toolbar from './components/Toolbar'
 import ContextMenu, { type ContextMenuItem } from './components/ContextMenu'
@@ -37,11 +37,6 @@ interface PaneState {
   text: string
 }
 
-interface DiffOpts {
-  trimWhitespace: boolean
-  ignoreCase: boolean
-}
-
 function LogoIcon(): ReactElement {
   return (
     <svg width="18" height="18" viewBox="0 0 24 24" fill="none">
@@ -59,7 +54,7 @@ function EmptyPane({
 }: {
   side: 'left' | 'right'
   onOpen: (s: 'left' | 'right') => void
-  onDrop: (s: 'left' | 'right', file: File) => void
+  onDrop: (s: 'left' | 'right', files: File[]) => void
 }): ReactElement {
   const [drag, setDrag] = useState(false)
   return (
@@ -73,8 +68,8 @@ function EmptyPane({
       onDrop={(e) => {
         e.preventDefault()
         setDrag(false)
-        const f = e.dataTransfer.files[0]
+        const files = Array.from(e.dataTransfer.files)
-        if (f) onDrop(side, f)
+        if (files.length > 0) onDrop(side, files)
       }}
     >
       <div>
@@ -93,7 +88,7 @@ function EmptyPane({
 export default function App(): ReactElement {
   const [paneL, setPaneL] = useState<PaneState | null>(null)
   const [paneR, setPaneR] = useState<PaneState | null>(null)
-  const [options, setOptions] = useState<DiffOpts>({ trimWhitespace: false, ignoreCase: false })
+  const [options, setOptions] = useState<DiffOptions>({ trimWhitespace: false, ignoreCase: false })
   const [activeRowId, setActiveRowId] = useState<string | null>(null)
   const [navIndex, setNavIndex] = useState(0)
   const [menu, setMenu] = useState<{ x: number; y: number; items: ContextMenuItem[] } | null>(null)
@@ -155,7 +150,10 @@ export default function App(): ReactElement {
   )
 
   const dropPane = useCallback(
-    async (side: 'left' | 'right', file: File) => {
+    async (side: 'left' | 'right', files: File[]) => {
+      const file = files[0]
+      if (!file) return
+      if (files.length > 1) showToast('一次只能导入一个文件，已取第一个')
       if (!isTextFile(file.name)) {
         showToast(`仅支持文本文件：${file.name}`)
         return
@@ -174,7 +172,13 @@ export default function App(): ReactElement {
         encoding = decoded.encoding
         binary = decoded.binary
       } catch {
-        text = await file.text().catch(() => '')
+        // IPC 解码失败时回退浏览器原生读取；两者都失败则明确报错，不静默加载空文本
+        const fallback = await file.text().catch(() => null)
+        if (fallback === null) {
+          showToast(`文件读取失败：${file.name}`)
+          return
+        }
+        text = fallback
       }
       if (binary) showToast(`疑似二进制文件，内容可能乱码：${file.name}`)
       const pane: PaneState = { meta: { name: file.name, encoding }, path: '', text }
@@ -219,11 +223,11 @@ export default function App(): ReactElement {
       const items: ContextMenuItem[] = [
         {
           label: `复制${sideName}此行内容`,
-          action: () => void navigator.clipboard.writeText(cell.text ?? '')
+          action: () => void window.api.setClipboard(cell.text ?? '')
         },
         {
           label: '复制文件名',
-          action: () => void navigator.clipboard.writeText(pane?.meta.name ?? '')
+          action: () => void window.api.setClipboard(pane?.meta.name ?? '')
         },
         {
           label: '在文件夹中显示',
@@ -270,12 +274,20 @@ export default function App(): ReactElement {
 
   const anyPane = paneL !== null || paneR !== null
 
-  const confirmPaste = useCallback((side: 'left' | 'right', text: string) => {
+  const confirmPaste = useCallback(
-    const pane: PaneState = { meta: { name: '手动文本', encoding: '文本' }, path: '', text }
+    (side: 'left' | 'right', text: string) => {
-    if (side === 'left') setPaneL(pane)
+      // 与文件入口的 10MB 字节上限保持对称：超限拒绝且不关闭弹窗，保留内容供编辑
-    else setPaneR(pane)
+      if (new TextEncoder().encode(text).length > MAX_FILE_SIZE) {
-    setPasteSide(null)
+        showToast('粘贴内容超过 10MB，暂不支持对比')
-  }, [])
+        return
+      }
+      const pane: PaneState = { meta: { name: '手动文本', encoding: '文本' }, path: '', text }
+      if (side === 'left') setPaneL(pane)
+      else setPaneR(pane)
+      setPasteSide(null)
+    },
+    [showToast]
+  )
 
   const leftMeta = paneL?.meta ?? null
   const rightMeta = paneR?.meta ?? null

src/renderer/src/__tests__/App.test.tsx

@@ -2,7 +2,11 @@ import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { render, screen, fireEvent, act } from '@testing-library/react'
 import App from '../App'
 
+let clipboardSpy: ReturnType<typeof vi.fn>
+
 function mockApi(overrides?: Partial<typeof window.api>): typeof window.api {
+  // 剪贴板统一走主进程 IPC，spy 挂在 setClipboard 上
+  clipboardSpy = vi.fn(async () => true)
   const base = {
     openFile: async () => ({
       path: '/tmp/a.txt',
@@ -14,23 +18,16 @@ function mockApi(overrides?: Partial<typeof window.api>): typeof window.api {
     decodeBuffer: async () => ({ text: 'line1\nline2', encoding: 'UTF-8', binary: false }),
     saveReport: async () => ({ ok: false, path: null }),
     showInFolder: async () => true,
-    setClipboard: async () => true
+    setClipboard: clipboardSpy
   }
   return { ...base, ...overrides } as typeof window.api
 }
 
-let clipboardSpy: ReturnType<typeof vi.fn>
-
 beforeEach(() => {
+  vi.restoreAllMocks()
   window.api = mockApi()
   // jsdom 未实现 scrollIntoView，导航定位需要打桩
   Element.prototype.scrollIntoView = vi.fn()
-  // jsdom 未实现 navigator.clipboard，右键复制需要打桩
-  clipboardSpy = vi.fn()
-  Object.defineProperty(navigator, 'clipboard', {
-    value: { writeText: clipboardSpy },
-    configurable: true
-  })
 })
 
 afterEach(() => {
@@ -175,7 +172,7 @@ describe('App - 右键菜单操作', () => {
     expect(screen.queryByText('复制左侧此行内容')).not.toBeInTheDocument()
   })
 
-  it('执行复制文件名', async () => {
+  it('执行复制文件名（走主进程剪贴板 IPC）', async () => {
     render(<App />)
     fireEvent.click(screen.getByText('打开左侧'))
     await screen.findByText('导出报告')
@@ -323,6 +320,31 @@ describe('App - 提示与容错', () => {
     expect(await screen.findByText(/疑似二进制文件/)).toBeInTheDocument()
   })
 
+  it('拖放文件解码与兜底读取均失败时提示且保持空态', async () => {
+    window.api = mockApi({
+      decodeBuffer: async () => {
+        throw new Error('boom')
+      }
+    })
+    vi.spyOn(File.prototype, 'text').mockRejectedValue(new Error('io'))
+    render(<App />)
+    const file = new File(['x'], 'bad.txt', { type: 'text/plain' })
+    const pane = screen.getByText(/选择左侧文件/).closest('.pane-empty') as Element
+    fireEvent.drop(pane, { dataTransfer: { files: [file] } })
+    expect(await screen.findByText(/文件读取失败：bad\.txt/)).toBeInTheDocument()
+    expect(screen.queryByText('导出报告')).not.toBeInTheDocument()
+  })
+
+  it('多文件拖拽时提示已取第一个并加载首个文件', async () => {
+    render(<App />)
+    const first = new File(['a'], 'first.txt', { type: 'text/plain' })
+    const second = new File(['b'], 'second.txt', { type: 'text/plain' })
+    const pane = screen.getByText(/选择左侧文件/).closest('.pane-empty') as Element
+    fireEvent.drop(pane, { dataTransfer: { files: [first, second] } })
+    expect(await screen.findByText(/一次只能导入一个文件/)).toBeInTheDocument()
+    expect(screen.getAllByText('first.txt').length).toBeGreaterThan(0)
+  })
+
   it('导出时 IPC 异常给出失败提示', async () => {
     window.api = mockApi({
       saveReport: async () => {
@@ -379,4 +401,18 @@ describe('App - 手动粘贴文本', () => {
     fireEvent.click(screen.getByText('开始对比'))
     expect(await screen.findByText('导出报告')).toBeInTheDocument()
   })
+
+  it('粘贴内容超过 10MB 被拒绝且弹窗保持打开', async () => {
+    render(<App />)
+    fireEvent.click(screen.getByText('粘贴文本'))
+    fireEvent.click(screen.getByText('粘贴到左侧'))
+    fireEvent.change(screen.getByPlaceholderText(/粘贴或输入/), {
+      target: { value: 'x'.repeat(10 * 1024 * 1024 + 1) }
+    })
+    fireEvent.click(screen.getByText('开始对比'))
+    expect(await screen.findByText(/粘贴内容超过 10MB/)).toBeInTheDocument()
+    // 弹窗保持打开，未进入对比视图
+    expect(screen.getByText('开始对比')).toBeInTheDocument()
+    expect(screen.queryByText('导出报告')).not.toBeInTheDocument()
+  })
 })

src/renderer/src/components/ContextMenu.test.tsx

@@ -55,4 +55,45 @@ describe('ContextMenu', () => {
     fireEvent.keyDown(document, { key: 'Escape' })
     expect(onClose).toHaveBeenCalled()
   })
+
+  it('靠近右/下边缘时收回视口内', () => {
+    // 模拟菜单实测尺寸 200x120
+    const rectSpy = vi.spyOn(Element.prototype, 'getBoundingClientRect').mockReturnValue({
+      width: 200,
+      height: 120,
+      top: 0,
+      left: 0,
+      right: 200,
+      bottom: 120,
+      x: 0,
+      y: 0,
+      toJSON: () => ({})
+    } as DOMRect)
+    render(
+      <ContextMenu
+        x={window.innerWidth + 500}
+        y={window.innerHeight + 500}
+        items={[{ label: '菜单项', action: vi.fn() }]}
+        onClose={vi.fn()}
+      />
+    )
+    const menu = document.querySelector('.ctx-menu') as HTMLElement
+    expect(parseFloat(menu.style.left)).toBe(window.innerWidth - 8 - 200)
+    expect(parseFloat(menu.style.top)).toBe(window.innerHeight - 8 - 120)
+    rectSpy.mockRestore()
+  })
+
+  it('未溢出时保持原始坐标', () => {
+    render(
+      <ContextMenu
+        x={10}
+        y={10}
+        items={[{ label: '菜单项', action: vi.fn() }]}
+        onClose={vi.fn()}
+      />
+    )
+    const menu = document.querySelector('.ctx-menu') as HTMLElement
+    expect(menu.style.left).toBe('10px')
+    expect(menu.style.top).toBe('10px')
+  })
 })

src/renderer/src/components/ContextMenu.tsx

@@ -1,4 +1,4 @@
-import { useEffect, type ReactElement } from 'react'
+import { useEffect, useLayoutEffect, useRef, useState, type ReactElement } from 'react'
 
 export interface ContextMenuItem {
   label: string
@@ -19,6 +19,9 @@ export default function ContextMenu({
   items,
   onClose
 }: ContextMenuProps): ReactElement {
+  const menuRef = useRef<HTMLDivElement>(null)
+  const [pos, setPos] = useState({ left: x, top: y })
+
   // Esc 关闭菜单
   useEffect(() => {
     const onKey = (e: KeyboardEvent): void => {
@@ -28,6 +31,21 @@ export default function ContextMenu({
     return () => document.removeEventListener('keydown', onKey)
   }, [onClose])
 
+  // 渲染后实测菜单尺寸，溢出视口时收回边界内（右/下各留 8px 边距）
+  useLayoutEffect(() => {
+    const el = menuRef.current
+    if (!el) return
+    const { width, height } = el.getBoundingClientRect()
+    const vw = window.innerWidth
+    const vh = window.innerHeight
+    const margin = 8
+    let left = x
+    let top = y
+    if (left + width > vw - margin) left = Math.max(margin, vw - margin - width)
+    if (top + height > vh - margin) top = Math.max(margin, vh - margin - height)
+    setPos((prev) => (prev.left === left && prev.top === top ? prev : { left, top }))
+  }, [x, y, items])
+
   return (
     <div
       className="ctx-backdrop"
@@ -38,8 +56,9 @@ export default function ContextMenu({
       }}
     >
       <div
+        ref={menuRef}
         className="ctx-menu"
-        style={{ left: x, top: y }}
+        style={{ left: pos.left, top: pos.top }}
         onMouseDown={(e) => e.stopPropagation()}
       >
         {items.map((it, i) => (

src/renderer/src/components/DiffView.test.tsx

@@ -199,6 +199,6 @@ describe('DiffView', () => {
     const panes = container.querySelectorAll('.pane')
     const file = new File(['x'], 'c.txt', { type: 'text/plain' })
     fireEvent.drop(panes[0] as Element, { dataTransfer: { files: [file] } })
-    expect(onDropFile).toHaveBeenCalledWith('left', file)
+    expect(onDropFile).toHaveBeenCalledWith('left', [file])
   })
 })

src/renderer/src/components/DiffView.tsx

@@ -20,7 +20,7 @@ interface DiffViewProps {
   activeRowId: string | null
   onOpen: (side: 'left' | 'right') => void
   onRowContext: (e: ReactMouseEvent, side: 'left' | 'right', cell: SideCell) => void
-  onDropFile: (side: 'left' | 'right', file: File) => void
+  onDropFile: (side: 'left' | 'right', files: File[]) => void
 }
 
 /** 把行尾空白用淡色高亮显示，便于识别被忽略/忽略差异 */
@@ -66,7 +66,7 @@ function SidePanel({
   meta: PaneMeta | null
   onOpen: (side: 'left' | 'right') => void
   onRowContext: (e: ReactMouseEvent, side: 'left' | 'right', cell: SideCell) => void
-  onDropFile: (side: 'left' | 'right', file: File) => void
+  onDropFile: (side: 'left' | 'right', files: File[]) => void
   scrollRef: RefObject<HTMLDivElement>
   onScroll: () => void
   activeRowId: string | null
@@ -77,8 +77,8 @@ function SidePanel({
       onDragOver={(e) => e.preventDefault()}
       onDrop={(e) => {
         e.preventDefault()
-        const f = e.dataTransfer.files[0]
+        const files = Array.from(e.dataTransfer.files)
-        if (f) onDropFile(side, f)
+        if (files.length > 0) onDropFile(side, files)
       }}
     >
       <div className="panel-head">

src/renderer/src/components/Toolbar.tsx

@@ -1,13 +1,8 @@
 import { useCallback, useRef, useState, type ReactElement } from 'react'
-import { DiffSummary } from '../diff/diffEngine'
+import type { DiffOptions, DiffSummary } from '../diff/diffEngine'
 import { type ReportFormat } from '../diff/report'
 import { useDismiss } from '../hooks/useDismiss'
 
-export interface DiffOptions {
-  trimWhitespace: boolean
-  ignoreCase: boolean
-}
-
 const FORMATS: { fmt: ReportFormat; label: string }[] = [
   { fmt: 'html', label: 'HTML 报告' },
   { fmt: 'txt', label: '纯文本' },

src/renderer/src/diff/diffEngine.ts

@@ -46,8 +46,6 @@ export interface DiffResult {
   summary: DiffSummary
 }
 
-let rowSeq = 0
-
 function emptyLine(): SideCell {
   return { lineNo: null, text: null, segs: null }
 }
@@ -89,7 +87,7 @@ export function computeDiff(
   rightText: string,
   options: DiffOptions = {}
 ): DiffResult {
-  rowSeq = 0
+  let rowSeq = 0
   const leftOrig = splitLines(leftText)
   const rightOrig = splitLines(rightText)