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107 lines
3.8 KiB
TypeScript
107 lines
3.8 KiB
TypeScript
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import MarkdownIt from 'markdown-it'
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import abbreviation from 'markdown-it-abbr'
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import definitionList from 'markdown-it-deflist'
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import emoji from 'markdown-it-emoji'
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import footnote from 'markdown-it-footnote'
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import imsize from 'markdown-it-imsize'
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import inserted from 'markdown-it-ins'
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import marked from 'markdown-it-mark'
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import subscript from 'markdown-it-sub'
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import superscript from 'markdown-it-sup'
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import React, { ReactElement, RefObject, useMemo, useRef } from 'react'
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import { Alert } from 'react-bootstrap'
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import ReactHtmlParser from 'react-html-parser'
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import { Trans } from 'react-i18next'
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import { useSelector } from 'react-redux'
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import { ApplicationState } from '../../redux'
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import { ShowIf } from '../common/show-if/show-if'
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import { combinedEmojiData } from './markdown-it-plugins/emoji/mapping'
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import { linkifyExtra } from './markdown-it-plugins/linkify-extra'
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import { MarkdownItParserDebugger } from './markdown-it-plugins/parser-debugger'
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import './markdown-renderer.scss'
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import { ComponentReplacer } from './replace-components/ComponentReplacer'
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import { AdditionalMarkdownRendererProps, LineKeys } from './types'
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import { buildTransformer } from './utils/html-react-transformer'
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import { calculateNewLineNumberMapping } from './utils/line-number-mapping'
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export interface BasicMarkdownRendererProps {
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componentReplacers?: ComponentReplacer[],
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onConfigureMarkdownIt?: (md: MarkdownIt) => void,
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documentReference?: RefObject<HTMLDivElement>
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onBeforeRendering?: () => void
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}
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export const BasicMarkdownRenderer: React.FC<BasicMarkdownRendererProps & AdditionalMarkdownRendererProps> = ({
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className,
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content,
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wide,
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componentReplacers,
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onConfigureMarkdownIt,
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documentReference,
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onBeforeRendering
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}) => {
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const maxLength = useSelector((state: ApplicationState) => state.config.maxDocumentLength)
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const markdownIt = useMemo(() => {
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const md = new MarkdownIt('default', {
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html: true,
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breaks: true,
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langPrefix: '',
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typographer: true
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})
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md.use(emoji, {
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defs: combinedEmojiData
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})
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md.use(abbreviation)
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md.use(definitionList)
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md.use(subscript)
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md.use(superscript)
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md.use(inserted)
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md.use(marked)
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md.use(footnote)
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md.use(imsize)
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if (onConfigureMarkdownIt) {
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onConfigureMarkdownIt(md)
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}
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md.use(linkifyExtra)
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if (process.env.NODE_ENV !== 'production') {
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md.use(MarkdownItParserDebugger)
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}
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return md
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}, [onConfigureMarkdownIt])
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const oldMarkdownLineKeys = useRef<LineKeys[]>()
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const lastUsedLineId = useRef<number>(0)
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const markdownReactDom: ReactElement[] = useMemo(() => {
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if (onBeforeRendering) {
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onBeforeRendering()
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}
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const trimmedContent = content.substr(0, maxLength)
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const html: string = markdownIt.render(trimmedContent)
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const contentLines = trimmedContent.split('\n')
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const { lines: newLines, lastUsedLineId: newLastUsedLineId } = calculateNewLineNumberMapping(contentLines, oldMarkdownLineKeys.current ?? [], lastUsedLineId.current)
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oldMarkdownLineKeys.current = newLines
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lastUsedLineId.current = newLastUsedLineId
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const transformer = componentReplacers ? buildTransformer(newLines, componentReplacers) : undefined
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return ReactHtmlParser(html, { transform: transformer })
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}, [onBeforeRendering, content, maxLength, markdownIt, componentReplacers])
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return (
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<div className={`${className || ''} d-flex flex-column align-items-center ${wide ? 'wider' : ''}`}>
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<ShowIf condition={content.length > maxLength}>
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<Alert variant='danger' dir={'auto'}>
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<Trans i18nKey={'editor.error.limitReached.description'} values={{ maxLength }}/>
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</Alert>
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</ShowIf>
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<div ref={documentReference} className={'markdown-body w-100 d-flex flex-column align-items-center'}>
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{markdownReactDom}
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</div>
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</div>
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)
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}
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