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feat(frontend): add PDF viewer page with react-pdf (sub-phase 2.5) 

Dedicated /pdf-viewer route renders PDFs in-browser using react-pdf v10 + pdfjs-dist.
Page navigation, zoom controls, back-to-LTT link.
Standalone layout (no NavBar) for clean viewing experience.
Add getPdfViewerUrl helper and exclude pdfjs-dist from Vite optimizeDeps.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
This commit is contained in:
Woody 2026-04-24 17:09:32 +08:00
parent c518955d31
commit 67e411cdca
6 changed files with 539 additions and 59 deletions
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frontend/package-lock.json generated
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"version": "1.4.0",
"resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
"integrity": "sha512-lyuxPGr/Wfhrlem2CL/UcnUc1zcqKAImBDzukY7Y5F/yQiNdko6+fRLevlw1HgMySw7f611UIY408EtxRSoK3Q==",
"license": "MIT",
"dependencies": {
"js-tokens": "^3.0.0 || ^4.0.0"
},
"bin": {
"loose-envify": "cli.js"
}
},
"node_modules/redent": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/redent/-/redent-3.0.0.tgz",
@ -5510,6 +5835,12 @@
"jiti": "bin/jiti.js"
}
},
"node_modules/tiny-invariant": {
"version": "1.3.3",
"resolved": "https://registry.npmjs.org/tiny-invariant/-/tiny-invariant-1.3.3.tgz",
"integrity": "sha512-+FbBPE1o9QAYvviau/qC5SE3caw21q3xkvWKBtja5vgqOWIHHJ3ioaq1VPfn/Szqctz2bU/oYeKd9/z5BL+PVg==",
"license": "MIT"
},
"node_modules/tinybench": {
"version": "2.9.0",
"resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
@ -8888,6 +9219,15 @@
"node": ">=14"
}
},
"node_modules/warning": {
"version": "4.0.3",
"resolved": "https://registry.npmjs.org/warning/-/warning-4.0.3.tgz",
"integrity": "sha512-rpJyN222KWIvHJ/F53XSZv0Zl/accqHR8et1kpaMTD/fLCRxtV8iX8czMzY7sVZupTI3zcUTg8eycS2kNF9l6w==",
"license": "MIT",
"dependencies": {
"loose-envify": "^1.0.0"
}
},
"node_modules/webidl-conversions": {
"version": "7.0.0",
"resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",

2
frontend/package.json
View File

@ -14,9 +14,11 @@
"autoprefixer": "^10.5.0",
"axios": "^1.6.0",
"lucide-react": "^0.190.0",
"pdfjs-dist": "^5.6.205",
"react": "^18.2.0",
"react-dom": "^18.2.0",
"react-markdown": "^10.1.0",
"react-pdf": "^10.4.1",
"react-resizable-panels": "^4.10.0",
"react-router-dom": "^7.14.2",
"tailwindcss": "^3.4.0"

24
frontend/src/App.tsx
View File

@ -5,21 +5,27 @@ import { ErrorBoundary } from './components/ErrorBoundary'
import { NavBar } from './components/NavBar'
import { LTTPage } from './pages/LTTPage'
import { RAGDatabasePage } from './pages/RAGDatabasePage'
import { PdfViewerPage } from './pages/PdfViewerPage'
export default function App(): JSX.Element {
return (
<BrowserRouter>
<AppQueryProvider>
<ErrorBoundary>
<div className="h-screen flex flex-col">
<NavBar />
<div className="flex-1 overflow-auto">
<Routes>
<Route path="/" element={<LTTPage />} />
<Route path="/rag-database" element={<RAGDatabasePage />} />
</Routes>
</div>
</div>
<Routes>
<Route path="/pdf-viewer" element={<PdfViewerPage />} />
<Route path="*" element={
<div className="h-screen flex flex-col">
<NavBar />
<div className="flex-1 overflow-auto">
<Routes>
<Route path="/" element={<LTTPage />} />
<Route path="/rag-database" element={<RAGDatabasePage />} />
</Routes>
</div>
</div>
} />
</Routes>
</ErrorBoundary>
</AppQueryProvider>
</BrowserRouter>

7
frontend/src/lib/api.ts
View File

@ -43,3 +43,10 @@ export const getChunkPdfUrl = (filePath: string): string => {
const baseUrl: string = import.meta.env.VITE_API_BASE_URL ?? 'http://localhost:8000/api/v1'
return `${baseUrl}/chunks/${filePath}/pdf`
}
export const getPdfViewerUrl = (filePath: string, page?: number, title?: string): string => {
const params = new URLSearchParams({ url: getChunkPdfUrl(filePath) })
if (page !== undefined && page !== null) params.set('page', String(page))
if (title) params.set('title', title)
return `/pdf-viewer?${params.toString()}`
}

122
frontend/src/pages/PdfViewerPage.tsx Normal file
View File

@ -0,0 +1,122 @@
import React, { useState, useCallback } from 'react'
import { useSearchParams, Link } from 'react-router-dom'
import { Document, Page, pdfjs } from 'react-pdf'
import { ArrowLeft, ChevronLeft, ChevronRight, ZoomIn, ZoomOut } from 'lucide-react'
import 'react-pdf/dist/Page/AnnotationLayer.css'
import 'react-pdf/dist/Page/TextLayer.css'
pdfjs.GlobalWorkerOptions.workerSrc = new URL(
'pdfjs-dist/build/pdf.worker.min.mjs',
import.meta.url,
).toString()
const ZOOM_LEVELS = [0.5, 0.75, 1, 1.25, 1.5, 2]
const DEFAULT_ZOOM_INDEX = 2
export const PdfViewerPage: React.FC = () => {
const [searchParams] = useSearchParams()
const pdfUrl = searchParams.get('url') ?? ''
const initialPage = parseInt(searchParams.get('page') ?? '1', 10)
const title = searchParams.get('title') ?? 'PDF Viewer'
const [numPages, setNumPages] = useState<number>(0)
const [pageNumber, setPageNumber] = useState<number>(initialPage)
const [zoomIndex, setZoomIndex] = useState<number>(DEFAULT_ZOOM_INDEX)
const [loadError, setLoadError] = useState<string | null>(null)
const onDocumentLoadSuccess = useCallback(({ numPages: total }: { numPages: number }) => {
setNumPages(total)
setLoadError(null)
}, [])
const onDocumentLoadError = useCallback((error: Error) => {
setLoadError(error.message)
}, [])
const goToPrevPage = () => setPageNumber((prev) => Math.max(1, prev - 1))
const goToNextPage = () => setPageNumber((prev) => Math.min(numPages, prev + 1))
const zoomIn = () => setZoomIndex((prev) => Math.min(ZOOM_LEVELS.length - 1, prev + 1))
const zoomOut = () => setZoomIndex((prev) => Math.max(0, prev - 1))
if (!pdfUrl) {
return (
<div className="h-screen flex items-center justify-center bg-gray-50">
<div className="text-center space-y-4">
<p className="text-gray-600">No PDF URL provided.</p>
<Link to="/" className="text-blue-600 hover:underline">Back to LTT</Link>
</div>
</div>
)
}
return (
<div className="h-screen flex flex-col bg-gray-50">
<div className="flex items-center justify-between px-4 py-2 bg-white border-b border-gray-200 shrink-0">
<Link to="/" className="flex items-center space-x-1 text-sm text-blue-600 hover:text-blue-800">
<ArrowLeft className="w-4 h-4" />
<span>Back to LTT</span>
</Link>
<div className="flex items-center space-x-2">
<button
onClick={goToPrevPage}
disabled={pageNumber <= 1}
className="p-1 rounded hover:bg-gray-100 disabled:opacity-30 disabled:cursor-not-allowed"
>
<ChevronLeft className="w-4 h-4" />
</button>
<span className="text-sm text-gray-700 min-w-[120px] text-center">
{title} — Page {pageNumber}{numPages > 0 ? ` of ${numPages}` : ''}
</span>
<button
onClick={goToNextPage}
disabled={pageNumber >= numPages}
className="p-1 rounded hover:bg-gray-100 disabled:opacity-30 disabled:cursor-not-allowed"
>
<ChevronRight className="w-4 h-4" />
</button>
</div>
<div className="flex items-center space-x-1">
<button
onClick={zoomOut}
disabled={zoomIndex <= 0}
className="p-1 rounded hover:bg-gray-100 disabled:opacity-30 disabled:cursor-not-allowed"
>
<ZoomOut className="w-4 h-4" />
</button>
<span className="text-sm text-gray-600 min-w-[48px] text-center">
{Math.round(ZOOM_LEVELS[zoomIndex] * 100)}%
</span>
<button
onClick={zoomIn}
disabled={zoomIndex >= ZOOM_LEVELS.length - 1}
className="p-1 rounded hover:bg-gray-100 disabled:opacity-30 disabled:cursor-not-allowed"
>
<ZoomIn className="w-4 h-4" />
</button>
</div>
</div>
<div className="flex-1 overflow-auto flex justify-center p-4">
{loadError ? (
<div className="flex items-center justify-center h-full">
<p className="text-red-600">Failed to load PDF: {loadError}</p>
</div>
) : (
<Document
file={pdfUrl}
onLoadSuccess={onDocumentLoadSuccess}
onLoadError={onDocumentLoadError}
loading={<div className="text-gray-500">Loading PDF…</div>}
>
<Page
pageNumber={pageNumber}
scale={ZOOM_LEVELS[zoomIndex]}
renderTextLayer={true}
renderAnnotationLayer={true}
/>
</Document>
)}
</div>
</div>
)
}

3
frontend/vite.config.ts
View File

@ -6,6 +6,9 @@ export default defineConfig({
server: {
port: 5173,
},
optimizeDeps: {
exclude: ['pdfjs-dist'],
},
test: {
globals: true,
environment: 'jsdom',