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React metadata and file layout components
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| import React from 'react' | ||
| import { ReactNode, useEffect, useRef, useState } from 'react' | ||
| import { cn } from './Layout.js' | ||
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| interface DropdownProps { | ||
| label?: string | ||
| className?: string | ||
| children: ReactNode | ||
| } | ||
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| /** | ||
| * Dropdown menu component. | ||
| * | ||
| * @param {Object} props | ||
| * @param {string} props.label - button label | ||
| * @param {string} props.className - custom class name for the dropdown container | ||
| * @param {ReactNode} props.children - dropdown menu items | ||
| * @returns {ReactNode} | ||
| * @example | ||
| * <Dropdown label='Menu'> | ||
| * <button>Item 1</button> | ||
| * <button>Item 2</button> | ||
| * </Dropdown> | ||
| */ | ||
| export default function Dropdown({ label, className, children }: DropdownProps) { | ||
| const [isOpen, setIsOpen] = useState(false) | ||
| const dropdownRef = useRef<HTMLDivElement>(null) | ||
| const menuRef = useRef<HTMLDivElement>(null) | ||
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| function toggleDropdown() { | ||
| setIsOpen(!isOpen) | ||
| } | ||
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| useEffect(() => { | ||
| function handleClickInside(event: MouseEvent) { | ||
| const target = event.target as Element | ||
| if (menuRef.current && menuRef.current.contains(target) && target?.tagName !== 'INPUT') { | ||
| setIsOpen(false) | ||
| } | ||
| } | ||
| function handleClickOutside(event: MouseEvent) { | ||
| if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) { | ||
| setIsOpen(false) | ||
| } | ||
| } | ||
| function handleEscape(event: KeyboardEvent) { | ||
| if (event.key === 'Escape') { | ||
| setIsOpen(false) | ||
| } | ||
| } | ||
| document.addEventListener('click', handleClickInside) | ||
| document.addEventListener('keydown', handleEscape) | ||
| document.addEventListener('mousedown', handleClickOutside) | ||
| return () => { | ||
| document.removeEventListener('click', handleClickInside) | ||
| document.removeEventListener('keydown', handleEscape) | ||
| document.removeEventListener('mousedown', handleClickOutside) | ||
| } | ||
| }, []) | ||
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| return ( | ||
| <div | ||
| className={cn('dropdown', className, isOpen && 'open')} | ||
| ref={dropdownRef}> | ||
| <button className='dropdown-button' onClick={toggleDropdown}> | ||
| {label} | ||
| </button> | ||
| <div className='dropdown-content' ref={menuRef}> | ||
| {children} | ||
| </div> | ||
| </div> | ||
| ) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| import React, { ReactNode } from 'react' | ||
| import { getColumnRange } from '../src/column.js' | ||
| import type { FileMetaData } from '../src/metadata.js' | ||
| import { ColumnChunk } from '../src/types.js' | ||
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| interface LayoutProps { | ||
| byteLength: number | ||
| metadata: FileMetaData | ||
| } | ||
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| export default function ParquetLayout({ byteLength, metadata }: LayoutProps) { | ||
| const metadataStart = byteLength - metadata.metadata_length - 4 | ||
| const metadataEnd = byteLength - 4 | ||
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| return <div className='viewer'> | ||
| <div className='layout'> | ||
| <Cell name='PAR1' start={0n} end={4n} /> | ||
| <RowGroups metadata={metadata} /> | ||
| <ColumnIndexes metadata={metadata} /> | ||
| <Cell name='Metadata' start={metadataStart} end={metadataEnd} /> | ||
| <Cell name='PAR1' start={metadataEnd} end={byteLength} /> | ||
| </div> | ||
| </div> | ||
| } | ||
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| function Cell<N extends bigint | number>({ name, start, end }: { name: string, start: N, end: N }) { | ||
| const bytes = end - start | ||
| return <div className="cell"> | ||
| <label>{name}</label> | ||
| <ul> | ||
| <li>start {start.toLocaleString()}</li> | ||
| <li>bytes {bytes.toLocaleString()}</li> | ||
| <li>end {end.toLocaleString()}</li> | ||
| </ul> | ||
| </div> | ||
| } | ||
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| function Group({ children, name, bytes }: { children: ReactNode, name?: string, bytes?: bigint }) { | ||
| return <div className="group"> | ||
| <div className="group-header"> | ||
| <label>{name}</label> | ||
| <span>{bytes === undefined ? '' : `bytes ${bytes.toLocaleString()}`}</span> | ||
| </div> | ||
| {children} | ||
| </div> | ||
| } | ||
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| function RowGroups({ metadata }: { metadata: FileMetaData }) { | ||
| return <> | ||
| {metadata.row_groups.map((rowGroup, i) => ( | ||
| <Group key={i} name={`RowGroup ${i}`} bytes={rowGroup.total_byte_size}> | ||
| {rowGroup.columns.map((column, j) => ( | ||
| <Column key={j} column={column} /> | ||
| ))} | ||
| </Group> | ||
| ))} | ||
| </> | ||
| } | ||
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| function Column({ key, column }: { key: number, column: ColumnChunk }) { | ||
| if (!column.meta_data) return null | ||
| const end = getColumnRange(column.meta_data)[1] | ||
| const pages = [ | ||
| { name: 'Dictionary', offset: column.meta_data.dictionary_page_offset }, | ||
| { name: 'Data', offset: column.meta_data.data_page_offset }, | ||
| { name: 'Index', offset: column.meta_data.index_page_offset }, | ||
| { name: 'End', offset: end }, | ||
| ] | ||
| .filter(({ offset }) => offset !== undefined) | ||
| .sort((a, b) => Number(a.offset) - Number(b.offset)) | ||
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| const children = pages.slice(0, -1).map(({ name, offset }, index) => ( | ||
| <Cell key={name} name={name} start={offset!} end={pages[index + 1].offset!} /> | ||
| )) | ||
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| return <Group | ||
| key={key} | ||
| name={`Column ${column.meta_data?.path_in_schema.join('.')}`} | ||
| bytes={column.meta_data?.total_compressed_size}> | ||
| {children} | ||
| </Group> | ||
| } | ||
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| function ColumnIndexes({ metadata }: { metadata: FileMetaData }) { | ||
| const indexPages = [] | ||
| for (const rowGroup of metadata.row_groups) { | ||
| for (const column of rowGroup.columns) { | ||
| const columnName = column.meta_data?.path_in_schema.join('.') | ||
| if (column.column_index_offset) { | ||
| indexPages.push({ | ||
| name: `ColumnIndex ${columnName}`, | ||
| start: column.column_index_offset, | ||
| end: column.column_index_offset + BigInt(column.column_index_length || 0), | ||
| }) | ||
| } | ||
| if (column.offset_index_offset) { | ||
| indexPages.push({ | ||
| name: `OffsetIndex ${columnName}`, | ||
| start: column.offset_index_offset, | ||
| end: column.offset_index_offset + BigInt(column.offset_index_length || 0), | ||
| }) | ||
| } | ||
| } | ||
| } | ||
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| return <Group name='ColumnIndexes'> | ||
| {indexPages.map(({ name, start, end }, index) => ( | ||
| <Cell key={index} name={name} start={start} end={end} /> | ||
| ))} | ||
| </Group> | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| import React from 'react' | ||
| import type { FileMetaData } from '../src/metadata.js' | ||
| import { toJson } from '../src/utils.js' | ||
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| interface MetadataProps { | ||
| metadata: FileMetaData | ||
| } | ||
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| export default function ParquetMetadata({ metadata }: MetadataProps) { | ||
| return <code className='viewer'> | ||
| {JSON.stringify(toJson(metadata), null, ' ')} | ||
| </code> | ||
| } |
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