Use a global Config context instead of passing props along all the components

src/components/App.tsx

@@ -1,3 +1,5 @@
+import { useMemo } from 'react'
+import { Config, ConfigProvider } from '../hooks/useConfig.js'
 import { getHttpSource } from '../lib/sources/httpSource.js'
 import { getHyperparamSource } from '../lib/sources/hyperparamSource.js'
 import Page from './Page.js'
@@ -10,20 +12,20 @@ export default function App() {
 
   const source = getHttpSource(sourceId) ?? getHyperparamSource(sourceId, { endpoint: location.origin })
 
+  // Memoize the config to avoid creating a new object on each render
+  const config: Config = useMemo(() => ({
+    routes: {
+      getSourceRouteUrl: ({ sourceId }) => `/files?key=${sourceId}`,
+      getCellRouteUrl: ({ sourceId, col, row }) => `/files?key=${sourceId}&col=${col}&row=${row}`,
+    },
+  }), [])
+
   if (!source) {
     return <div>Could not load a data source. You have to pass a valid source in the url.</div>
   }
   return (
-    <Page
-      source={source}
-      navigation={{ row, col }}
-      config={{
-        slidePanel: {},
-        routes: {
-          getSourceRouteUrl: ({ sourceId }) => `/files?key=${sourceId}`,
-          getCellRouteUrl: ({ sourceId, col, row }) => `/files?key=${sourceId}&col=${col}&row=${row}`,
-        },
-      }}
-    />
+    <ConfigProvider value={config}>
+      <Page source={source} navigation={{ row, col }} />
+    </ConfigProvider>
   )
 }

src/components/Breadcrumb.tsx

@@ -1,22 +1,22 @@
 import type { ReactNode } from 'react'
-import type { RoutesConfig } from '../lib/routes.js'
+import { useConfig } from '../hooks/useConfig.js'
 import type { Source } from '../lib/sources/types.js'
 
-export type BreadcrumbConfig = RoutesConfig
 interface BreadcrumbProps {
   source: Source,
-  config?: BreadcrumbConfig
   children?: ReactNode
 }
 
 /**
  * Breadcrumb navigation
  */
-export default function Breadcrumb({ source, config, children }: BreadcrumbProps) {
+export default function Breadcrumb({ source, children }: BreadcrumbProps) {
+  const { routes } = useConfig()
+
   return <nav className='top-header top-header-divided'>
     <div className='path'>
       {source.sourceParts.map((part, depth) =>
-        <a href={config?.routes?.getSourceRouteUrl?.({ sourceId: part.sourceId }) ?? ''} key={depth}>{part.text}</a>
+        <a href={routes?.getSourceRouteUrl?.({ sourceId: part.sourceId }) ?? ''} key={depth}>{part.text}</a>
       )}
     </div>
     {children}

src/components/Cell.tsx

@@ -3,22 +3,19 @@ import { asyncBufferFromUrl, parquetMetadataAsync } from 'hyparquet'
 import { useEffect, useState } from 'react'
 import type { FileSource } from '../lib/sources/types.js'
 import { parquetDataFrame } from '../lib/tableProvider.js'
-import Breadcrumb, { BreadcrumbConfig } from './Breadcrumb.js'
+import Breadcrumb from './Breadcrumb.js'
 import Layout from './Layout.js'
 
-export type CellConfig = BreadcrumbConfig
-
 interface CellProps {
   source: FileSource;
   row: number;
   col: number;
-  config?: CellConfig
 }
 
 /**
  * Cell viewer displays a single cell from a table.
  */
-export default function CellView({ source, row, col, config }: CellProps) {
+export default function CellView({ source, row, col }: CellProps) {
   const [text, setText] = useState<string | undefined>()
   const [progress, setProgress] = useState<number>()
   const [error, setError] = useState<Error>()
@@ -69,7 +66,7 @@ export default function CellView({ source, row, col, config }: CellProps) {
 
   return (
     <Layout progress={progress} error={error} title={fileName}>
-      <Breadcrumb source={source} config={config} />
+      <Breadcrumb source={source} />
 
       {/* <Highlight text={text || ''} /> */}
       <pre className="viewer text">{text}</pre>

src/components/File.tsx

@@ -1,25 +1,22 @@
 import { useState } from 'react'
 import type { FileSource } from '../lib/sources/types.js'
-import Breadcrumb, { BreadcrumbConfig } from './Breadcrumb.js'
+import Breadcrumb from './Breadcrumb.js'
 import Layout from './Layout.js'
-import Viewer, { ViewerConfig } from './viewers/Viewer.js'
-
-export type FileConfig = ViewerConfig & BreadcrumbConfig
+import Viewer from './viewers/Viewer.js'
 
 interface FileProps {
   source: FileSource
-  config?: FileConfig
 }
 
 /**
  * File viewer page
  */
-export default function File({ source, config }: FileProps) {
+export default function File({ source }: FileProps) {
   const [progress, setProgress] = useState<number>()
   const [error, setError] = useState<Error>()
 
   return <Layout progress={progress} error={error} title={source.fileName}>
-    <Breadcrumb source={source} config={config} />
-    <Viewer source={source} setProgress={setProgress} setError={setError} config={config} />
+    <Breadcrumb source={source} />
+    <Viewer source={source} setProgress={setProgress} setError={setError} />
   </Layout>
 }

src/components/Folder.tsx

@@ -1,27 +1,27 @@
 import { useEffect, useRef, useState } from 'react'
+import { useConfig } from '../hooks/useConfig.js'
 import type { DirSource, FileMetadata } from '../lib/sources/types.js'
 import { cn, formatFileSize, getFileDate, getFileDateShort } from '../lib/utils.js'
-import Breadcrumb, { BreadcrumbConfig } from './Breadcrumb.js'
+import Breadcrumb from './Breadcrumb.js'
 import Layout, { Spinner } from './Layout.js'
 
-export type FolderConfig = BreadcrumbConfig
-
 interface FolderProps {
   source: DirSource
-  config?: FolderConfig
 }
 
 /**
  * Folder browser page
  */
-export default function Folder({ source, config }: FolderProps) {
+export default function Folder({ source }: FolderProps) {
   // State to hold file listing
   const [files, setFiles] = useState<FileMetadata[]>()
   const [error, setError] = useState<Error>()
   const [searchQuery, setSearchQuery] = useState('')
   const searchRef = useRef<HTMLInputElement>(null)
   const listRef = useRef<HTMLUListElement>(null)
 
+  const { routes } = useConfig()
+
   // Fetch files on component mount
   useEffect(() => {
     source.listFiles()
@@ -83,7 +83,7 @@ export default function Folder({ source, config }: FolderProps) {
   }, [])
 
   return <Layout error={error} title={source.prefix}>
-    <Breadcrumb source={source} config={config}>
+    <Breadcrumb source={source}>
       <div className='top-actions'>
         <input autoFocus className='search' placeholder='Search...' ref={searchRef} />
       </div>
@@ -92,7 +92,7 @@ export default function Folder({ source, config }: FolderProps) {
     {files && files.length > 0 && <ul className='file-list' ref={listRef}>
       {filtered?.map((file, index) =>
         <li key={index}>
-          <a href={config?.routes?.getSourceRouteUrl?.({ sourceId: file.sourceId }) ?? location.href}>
+          <a href={routes?.getSourceRouteUrl?.({ sourceId: file.sourceId }) ?? location.href}>
             <span className={cn('file-name', 'file', file.kind === 'directory' && 'folder')}>
               {file.name}
             </span>

src/components/Page.tsx

@@ -1,9 +1,8 @@
 import { Source } from '../lib/sources/types.js'
 import Cell from './Cell.js'
-import File, { FileConfig } from './File.js'
+import File from './File.js'
 import Folder from './Folder.js'
 
-export type PageConfig = FileConfig
 export interface Navigation {
   col?: number
   row?: number
@@ -12,18 +11,17 @@ export interface Navigation {
 interface PageProps {
   source: Source,
   navigation?: Navigation,
-  config?: PageConfig
 }
 
-export default function Page({ source, navigation, config }: PageProps) {
+export default function Page({ source, navigation }: PageProps) {
   if (source.kind === 'directory') {
-    return <Folder source={source} config={config}/>
+    return <Folder source={source} />
   }
   if (navigation?.row !== undefined && navigation.col !== undefined) {
     // cell view
-    return <Cell source={source} row={navigation.row} col={navigation.col} config={config} />
+    return <Cell source={source} row={navigation.row} col={navigation.col} />
   } else {
     // file view
-    return <File source={source} config={config} />
+    return <File source={source} />
   }
 }

src/components/index.ts

@@ -1,10 +1,9 @@
-import Breadcrumb, { BreadcrumbConfig } from './Breadcrumb.js'
-import Cell, { CellConfig } from './Cell.js'
-import File, { FileConfig } from './File.js'
-import Folder, { FolderConfig } from './Folder.js'
+import Breadcrumb from './Breadcrumb.js'
+import Cell from './Cell.js'
+import File from './File.js'
+import Folder from './Folder.js'
 import Layout, { ErrorBar, Spinner } from './Layout.js'
 import Markdown from './Markdown.js'
-import Page, { PageConfig } from './Page.js'
+import Page from './Page.js'
 export * from './viewers/index.js'
 export { Breadcrumb, Cell, ErrorBar, File, Folder, Layout, Markdown, Page, Spinner }
-export type { BreadcrumbConfig, CellConfig, FileConfig, FolderConfig, PageConfig }

src/components/viewers/ParquetView.tsx

@@ -1,28 +1,21 @@
 import HighTable, { DataFrame, rowCache } from 'hightable'
 import { asyncBufferFromUrl, parquetMetadataAsync } from 'hyparquet'
 import React, { useCallback, useEffect, useState } from 'react'
-import { RoutesConfig, appendSearchParams } from '../../lib/routes.js'
+import { useConfig } from '../../hooks/useConfig.js'
+import { appendSearchParams } from '../../lib/routes.js'
 import { FileSource } from '../../lib/sources/types.js'
 import { parquetDataFrame } from '../../lib/tableProvider.js'
 import { cn } from '../../lib/utils.js'
 import styles from '../../styles/ParquetView.module.css'
 import { Spinner } from '../Layout.js'
 import CellPanel from './CellPanel.js'
 import ContentHeader, { ContentSize } from './ContentHeader.js'
-import SlidePanel, { SlidePanelConfig } from './SlidePanel.js'
-
-interface HighTableConfig {
-  hightable?: {
-    className?: string;
-  }
-}
-export type ParquetViewConfig = SlidePanelConfig & RoutesConfig & HighTableConfig
+import SlidePanel from './SlidePanel.js'
 
 interface ViewerProps {
   source: FileSource
   setProgress: (progress: number | undefined) => void
   setError: (error: Error | undefined) => void
-  config?: ParquetViewConfig
 }
 
 interface Content extends ContentSize {
@@ -32,10 +25,11 @@ interface Content extends ContentSize {
 /**
  * Parquet file viewer
  */
-export default function ParquetView({ source, setProgress, setError, config }: ViewerProps) {
+export default function ParquetView({ source, setProgress, setError }: ViewerProps) {
   const [isLoading, setIsLoading] = useState<boolean>(true)
   const [content, setContent] = useState<Content>()
   const [cell, setCell] = useState<{ row: number, col: number } | undefined>()
+  const { highTable, routes } = useConfig()
 
   useEffect(() => {
     async function loadParquetDataFrame() {
@@ -77,12 +71,12 @@ export default function ParquetView({ source, setProgress, setError, config }: V
 
   const { sourceId } = source
   const getCellRouteUrl = useCallback(({ col, row }: {col: number, row: number}) => {
-    const url = config?.routes?.getCellRouteUrl?.({ sourceId, col, row })
+    const url = routes?.getCellRouteUrl?.({ sourceId, col, row })
     if (url) {
       return url
     }
     return appendSearchParams({ col: col.toString(), row: row.toString() })
-  }, [config, sourceId])
+  }, [routes, sourceId])
 
   const onDoubleClickCell = useCallback((_event: React.MouseEvent, col: number, row: number) => {
     if (cell?.col === col && cell.row === row) {
@@ -108,7 +102,7 @@ export default function ParquetView({ source, setProgress, setError, config }: V
       onDoubleClickCell={onDoubleClickCell}
       onMouseDownCell={onMouseDownCell}
       onError={setError}
-      className={cn(styles.hightable, config?.hightable?.className)}
+      className={cn(styles.hightable, highTable?.className)}
     />}
 
     {isLoading && <div className='center'><Spinner /></div>}
@@ -132,7 +126,6 @@ export default function ParquetView({ source, setProgress, setError, config }: V
       isPanelOpen={!!(content?.dataframe && cell)}
       mainContent={mainContent}
       panelContent={panelContent}
-      config={config}
     />
   )
 }

src/components/viewers/SlidePanel.tsx

@@ -1,17 +1,10 @@
 import React, { ReactNode, useCallback, useEffect, useState } from 'react'
-
-export interface SlidePanelConfig {
-  slidePanel?: {
-    minWidth?: number
-    defaultWidth?: number
-  }
-}
+import { useConfig } from '../../hooks/useConfig.js'
 
 interface SlidePanelProps {
   mainContent: ReactNode
   panelContent: ReactNode
   isPanelOpen: boolean
-  config?: SlidePanelConfig
 }
 
 const WIDTH = {
@@ -22,17 +15,16 @@ const WIDTH = {
 /**
  * Slide out panel component with resizing.
  */
-export default function SlidePanel({
-  mainContent, panelContent, isPanelOpen, config,
-}: SlidePanelProps) {
-  const minWidth = config?.slidePanel?.minWidth && config.slidePanel.minWidth > 0 ? config.slidePanel.minWidth : WIDTH.MIN
+export default function SlidePanel({ mainContent, panelContent, isPanelOpen }: SlidePanelProps) {
+  const { slidePanel } = useConfig()
+  const minWidth = slidePanel?.minWidth && slidePanel.minWidth > 0 ? slidePanel.minWidth : WIDTH.MIN
   function validWidth(width?: number): number | undefined {
     if (width && minWidth <= width) {
       return width
     }
     return undefined
   }
-  const defaultWidth = validWidth(config?.slidePanel?.defaultWidth) ?? WIDTH.DEFAULT
+  const defaultWidth = validWidth(slidePanel?.defaultWidth) ?? WIDTH.DEFAULT
   const [resizingClientX, setResizingClientX] = useState(-1)
   const panelRef = React.createRef<HTMLDivElement>()
 

src/components/viewers/Viewer.tsx

@@ -4,40 +4,25 @@ import AvroView from './AvroView.js'
 import ImageView from './ImageView.js'
 import JsonView from './JsonView.js'
 import MarkdownView from './MarkdownView.js'
-import TableView, { ParquetViewConfig } from './ParquetView.js'
+import TableView from './ParquetView.js'
 import TextView from './TextView.js'
 
-export type ViewerConfig = ParquetViewConfig
-
 interface ViewerProps {
   source: FileSource;
   setError: (error: Error | undefined) => void;
   setProgress: (progress: number | undefined) => void;
-  config?: ViewerConfig;
 }
 
 /**
  * Get a viewer for a file.
  * Chooses viewer based on content type.
  */
-export default function Viewer({
-  source,
-  setError,
-  setProgress,
-  config,
-}: ViewerProps) {
+export default function Viewer({ source, setError, setProgress }: ViewerProps) {
   const { fileName } = source
   if (fileName.endsWith('.md')) {
     return <MarkdownView source={source} setError={setError} />
   } else if (fileName.endsWith('.parquet')) {
-    return (
-      <TableView
-        source={source}
-        setError={setError}
-        setProgress={setProgress}
-        config={config}
-      />
-    )
+    return <TableView source={source} setError={setError} setProgress={setProgress} />
   } else if (fileName.endsWith('.json')) {
     return <JsonView source={source} setError={setError} />
   } else if (fileName.endsWith('.avro')) {