mirror of https://github.com/langgenius/dify.git
339 lines
12 KiB
TypeScript
339 lines
12 KiB
TypeScript
import ReactMarkdown from 'react-markdown'
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import ReactEcharts from 'echarts-for-react'
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import 'katex/dist/katex.min.css'
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import RemarkMath from 'remark-math'
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import RemarkBreaks from 'remark-breaks'
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import RehypeKatex from 'rehype-katex'
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import RemarkGfm from 'remark-gfm'
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import RehypeRaw from 'rehype-raw'
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import SyntaxHighlighter from 'react-syntax-highlighter'
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import {
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atelierHeathDark,
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atelierHeathLight,
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} from 'react-syntax-highlighter/dist/esm/styles/hljs'
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import { Component, memo, useMemo, useRef, useState } from 'react'
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import { flow } from 'lodash-es'
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import ActionButton from '@/app/components/base/action-button'
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import CopyIcon from '@/app/components/base/copy-icon'
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import SVGBtn from '@/app/components/base/svg'
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import Flowchart from '@/app/components/base/mermaid'
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import ImageGallery from '@/app/components/base/image-gallery'
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import { useChatContext } from '@/app/components/base/chat/chat/context'
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import VideoGallery from '@/app/components/base/video-gallery'
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import AudioGallery from '@/app/components/base/audio-gallery'
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import MarkdownButton from '@/app/components/base/markdown-blocks/button'
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import MarkdownForm from '@/app/components/base/markdown-blocks/form'
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import ThinkBlock from '@/app/components/base/markdown-blocks/think-block'
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import { Theme } from '@/types/app'
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import useTheme from '@/hooks/use-theme'
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import cn from '@/utils/classnames'
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import SVGRenderer from './svg-gallery'
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// Available language https://github.com/react-syntax-highlighter/react-syntax-highlighter/blob/master/AVAILABLE_LANGUAGES_HLJS.MD
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const capitalizationLanguageNameMap: Record<string, string> = {
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sql: 'SQL',
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javascript: 'JavaScript',
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java: 'Java',
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typescript: 'TypeScript',
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vbscript: 'VBScript',
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css: 'CSS',
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html: 'HTML',
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xml: 'XML',
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php: 'PHP',
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python: 'Python',
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yaml: 'Yaml',
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mermaid: 'Mermaid',
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markdown: 'MarkDown',
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makefile: 'MakeFile',
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echarts: 'ECharts',
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shell: 'Shell',
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powershell: 'PowerShell',
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json: 'JSON',
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latex: 'Latex',
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svg: 'SVG',
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}
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const getCorrectCapitalizationLanguageName = (language: string) => {
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if (!language)
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return 'Plain'
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if (language in capitalizationLanguageNameMap)
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return capitalizationLanguageNameMap[language]
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return language.charAt(0).toUpperCase() + language.substring(1)
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}
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const preprocessLaTeX = (content: string) => {
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if (typeof content !== 'string')
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return content
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const codeBlockRegex = /```[\s\S]*?```/g
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const codeBlocks = content.match(codeBlockRegex) || []
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let processedContent = content.replace(codeBlockRegex, 'CODE_BLOCK_PLACEHOLDER')
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processedContent = flow([
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(str: string) => str.replace(/\\\[(.*?)\\\]/g, (_, equation) => `$$${equation}$$`),
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(str: string) => str.replace(/\\\[(.*?)\\\]/gs, (_, equation) => `$$${equation}$$`),
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(str: string) => str.replace(/\\\((.*?)\\\)/g, (_, equation) => `$$${equation}$$`),
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(str: string) => str.replace(/(^|[^\\])\$(.+?)\$/g, (_, prefix, equation) => `${prefix}$${equation}$`),
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])(processedContent)
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codeBlocks.forEach((block) => {
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processedContent = processedContent.replace('CODE_BLOCK_PLACEHOLDER', block)
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})
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return processedContent
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}
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const preprocessThinkTag = (content: string) => {
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const thinkOpenTagRegex = /<think>\n/g
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const thinkCloseTagRegex = /\n<\/think>/g
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return flow([
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(str: string) => str.replace(thinkOpenTagRegex, '<details data-think=true>\n'),
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(str: string) => str.replace(thinkCloseTagRegex, '\n[ENDTHINKFLAG]</details>'),
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])(content)
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}
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export function PreCode(props: { children: any }) {
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const ref = useRef<HTMLPreElement>(null)
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return (
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<pre ref={ref}>
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<span
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className="copy-code-button"
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></span>
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{props.children}
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</pre>
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)
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}
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// **Add code block
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// Avoid error #185 (Maximum update depth exceeded.
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// This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate.
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// React limits the number of nested updates to prevent infinite loops.)
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// Reference A: https://reactjs.org/docs/error-decoder.html?invariant=185
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// Reference B1: https://react.dev/reference/react/memo
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// Reference B2: https://react.dev/reference/react/useMemo
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// ****
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// The original error that occurred in the streaming response during the conversation:
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// Error: Minified React error 185;
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// visit https://reactjs.org/docs/error-decoder.html?invariant=185 for the full message
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// or use the non-minified dev environment for full errors and additional helpful warnings.
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const CodeBlock: any = memo(({ inline, className, children, ...props }: any) => {
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const { theme } = useTheme()
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const [isSVG, setIsSVG] = useState(true)
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const match = /language-(\w+)/.exec(className || '')
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const language = match?.[1]
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const languageShowName = getCorrectCapitalizationLanguageName(language || '')
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const chartData = useMemo(() => {
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if (language === 'echarts') {
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try {
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return JSON.parse(String(children).replace(/\n$/, ''))
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}
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catch { }
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}
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return JSON.parse('{"title":{"text":"ECharts error - Wrong JSON format."}}')
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}, [language, children])
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const renderCodeContent = useMemo(() => {
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const content = String(children).replace(/\n$/, '')
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if (language === 'mermaid' && isSVG) {
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return <Flowchart PrimitiveCode={content} />
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}
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else if (language === 'echarts') {
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return (
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<div style={{ minHeight: '350px', minWidth: '100%', overflowX: 'scroll' }}>
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<ErrorBoundary>
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<ReactEcharts option={chartData} style={{ minWidth: '700px' }} />
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</ErrorBoundary>
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</div>
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)
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}
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else if (language === 'svg' && isSVG) {
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return (
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<ErrorBoundary>
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<SVGRenderer content={content} />
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</ErrorBoundary>
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)
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}
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else {
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return (
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<SyntaxHighlighter
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{...props}
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style={theme === Theme.light ? atelierHeathLight : atelierHeathDark}
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customStyle={{
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paddingLeft: 12,
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borderBottomLeftRadius: '10px',
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borderBottomRightRadius: '10px',
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backgroundColor: 'var(--color-components-input-bg-normal)',
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}}
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language={match?.[1]}
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showLineNumbers
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PreTag="div"
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>
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{content}
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</SyntaxHighlighter>
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)
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}
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}, [language, match, props, children, chartData, isSVG])
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if (inline || !match)
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return <code {...props} className={className}>{children}</code>
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return (
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<div className='relative'>
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<div className='flex h-8 items-center justify-between rounded-t-[10px] border-b border-divider-subtle bg-components-input-bg-normal p-1 pl-3'>
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<div className='system-xs-semibold-uppercase text-text-secondary'>{languageShowName}</div>
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<div className='flex items-center gap-1'>
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{(['mermaid', 'svg']).includes(language!) && <SVGBtn isSVG={isSVG} setIsSVG={setIsSVG} />}
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<ActionButton>
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<CopyIcon content={String(children).replace(/\n$/, '')} />
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</ActionButton>
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</div>
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</div>
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{renderCodeContent}
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</div>
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)
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})
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CodeBlock.displayName = 'CodeBlock'
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const VideoBlock: any = memo(({ node }: any) => {
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const srcs = node.children.filter((child: any) => 'properties' in child).map((child: any) => (child as any).properties.src)
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if (srcs.length === 0)
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return null
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return <VideoGallery key={srcs.join()} srcs={srcs} />
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})
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VideoBlock.displayName = 'VideoBlock'
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const AudioBlock: any = memo(({ node }: any) => {
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const srcs = node.children.filter((child: any) => 'properties' in child).map((child: any) => (child as any).properties.src)
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if (srcs.length === 0)
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return null
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return <AudioGallery key={srcs.join()} srcs={srcs} />
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})
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AudioBlock.displayName = 'AudioBlock'
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const ScriptBlock = memo(({ node }: any) => {
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const scriptContent = node.children[0]?.value || ''
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return `<script>${scriptContent}</script>`
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})
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ScriptBlock.displayName = 'ScriptBlock'
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const Paragraph = (paragraph: any) => {
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const { node }: any = paragraph
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const children_node = node.children
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if (children_node && children_node[0] && 'tagName' in children_node[0] && children_node[0].tagName === 'img') {
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return (
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<div className="markdown-img-wrapper">
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<ImageGallery srcs={[children_node[0].properties.src]} />
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{
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Array.isArray(paragraph.children) && paragraph.children.length > 1 && (
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<div className="mt-2">{paragraph.children.slice(1)}</div>
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)
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}
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</div>
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)
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}
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return <p>{paragraph.children}</p>
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}
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const Img = ({ src }: any) => {
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return <div className="markdown-img-wrapper"><ImageGallery srcs={[src]} /></div>
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}
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const Link = ({ node, ...props }: any) => {
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if (node.properties?.href && node.properties.href?.toString().startsWith('abbr')) {
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// eslint-disable-next-line react-hooks/rules-of-hooks
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const { onSend } = useChatContext()
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const hidden_text = decodeURIComponent(node.properties.href.toString().split('abbr:')[1])
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return <abbr className="cursor-pointer underline !decoration-primary-700 decoration-dashed" onClick={() => onSend?.(hidden_text)} title={node.children[0]?.value}>{node.children[0]?.value}</abbr>
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}
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else {
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return <a {...props} target="_blank" className="cursor-pointer underline !decoration-primary-700 decoration-dashed">{node.children[0] ? node.children[0]?.value : 'Download'}</a>
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}
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}
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export function Markdown(props: { content: string; className?: string; customDisallowedElements?: string[] }) {
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const latexContent = flow([
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preprocessThinkTag,
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preprocessLaTeX,
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])(props.content)
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return (
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<div className={cn('markdown-body', '!text-text-primary', props.className)}>
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<ReactMarkdown
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remarkPlugins={[
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RemarkGfm,
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[RemarkMath, { singleDollarTextMath: false }],
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RemarkBreaks,
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]}
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rehypePlugins={[
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RehypeKatex,
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RehypeRaw as any,
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// The Rehype plug-in is used to remove the ref attribute of an element
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() => {
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return (tree) => {
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const iterate = (node: any) => {
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if (node.type === 'element' && node.properties?.ref)
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delete node.properties.ref
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if (node.type === 'element' && !/^[a-z][a-z0-9]*$/i.test(node.tagName)) {
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node.type = 'text'
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node.value = `<${node.tagName}`
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}
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if (node.children)
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node.children.forEach(iterate)
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}
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tree.children.forEach(iterate)
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}
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},
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]}
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disallowedElements={['iframe', 'head', 'html', 'meta', 'link', 'style', 'body', ...(props.customDisallowedElements || [])]}
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components={{
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code: CodeBlock,
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img: Img,
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video: VideoBlock,
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audio: AudioBlock,
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a: Link,
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p: Paragraph,
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button: MarkdownButton,
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form: MarkdownForm,
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script: ScriptBlock as any,
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details: ThinkBlock,
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}}
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>
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{/* Markdown detect has problem. */}
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{latexContent}
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</ReactMarkdown>
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</div>
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)
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}
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// **Add an ECharts runtime error handler
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// Avoid error #7832 (Crash when ECharts accesses undefined objects)
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// This can happen when a component attempts to access an undefined object that references an unregistered map, causing the program to crash.
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export default class ErrorBoundary extends Component {
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constructor(props: any) {
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super(props)
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this.state = { hasError: false }
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}
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componentDidCatch(error: any, errorInfo: any) {
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this.setState({ hasError: true })
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console.error(error, errorInfo)
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}
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render() {
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// eslint-disable-next-line ts/ban-ts-comment
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// @ts-expect-error
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if (this.state.hasError)
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return <div>Oops! An error occurred. This could be due to an ECharts runtime error or invalid SVG content. <br />(see the browser console for more information)</div>
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// eslint-disable-next-line ts/ban-ts-comment
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// @ts-expect-error
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return this.props.children
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}
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}
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