@lobehub/ui/es/Mermaid/SyntaxMermaid/StreamMermaid.mjs.map

Lobe UI is an open-source UI component library for building AIGC web apps

{"version":3,"file":"StreamMermaid.mjs","names":["Image"],"sources":["../../../src/Mermaid/SyntaxMermaid/StreamMermaid.tsx"],"sourcesContent":["'use client';\n\nimport { kebabCase } from 'es-toolkit/compat';\nimport { memo, useEffect, useId, useMemo, useState } from 'react';\nimport type { Ref } from 'react';\n\nimport Image from '@/Image';\nimport { useStreamMermaid } from '@/hooks/useStreamMermaid';\n\nimport { mermaidThemes } from '../const';\nimport type { SyntaxMermaidProps } from '../type';\n\ninterface StreamMermaidProps {\n  children: string;\n  className?: string;\n  fallbackClassName?: string;\n  ref?: Ref<HTMLDivElement>;\n  style?: SyntaxMermaidProps['style'];\n  theme?: SyntaxMermaidProps['theme'];\n  variant?: SyntaxMermaidProps['variant'];\n}\n\nconst StreamMermaid = memo<StreamMermaidProps>(\n  ({ children, className, fallbackClassName, ref, style, theme: customTheme, variant }) => {\n    const safeChildren = children ?? '';\n    const isDefaultTheme = customTheme === 'lobe-theme' || !customTheme;\n\n    const background = useMemo(() => {\n      if (isDefaultTheme) return;\n      return mermaidThemes.find((item) => item.id === customTheme)?.background;\n    }, [isDefaultTheme, customTheme]);\n\n    const id = useId();\n    const mermaidId = kebabCase(`mermaid-${id}`);\n    const data = useStreamMermaid(safeChildren, {\n      enabled: true,\n      id: mermaidId,\n      theme: isDefaultTheme ? undefined : customTheme,\n    });\n    const isLoading = !data;\n    const [blobUrl, setBlobUrl] = useState<string>();\n\n    // 组件卸载时清理 Blob URL，避免内存泄漏\n    useEffect(() => {\n      return () => {\n        if (blobUrl) URL.revokeObjectURL(blobUrl);\n      };\n    }, [blobUrl]);\n\n    useEffect(() => {\n      if (isLoading || !data) {\n        // Clear blob URL when loading or no data\n        setBlobUrl(undefined);\n        return;\n      }\n\n      let finalSvgString = data;\n\n      // 修复Firefox点击预览mermaid图时宽高为0导致不显示的异常\n      if (\n        typeof window !== 'undefined' &&\n        typeof navigator !== 'undefined' &&\n        navigator.userAgent.includes('Firefox')\n      ) {\n        const parser = new DOMParser();\n        const svgDoc = parser.parseFromString(data, 'image/svg+xml');\n        const svgElement = svgDoc.documentElement;\n        if (svgElement && svgElement.hasAttribute('viewBox')) {\n          const viewBox = svgElement.getAttribute('viewBox')!;\n          const viewBoxParts = viewBox.split(' ');\n          if (Array.isArray(viewBoxParts) && viewBoxParts.length === 4) {\n            svgElement.setAttribute('width', viewBoxParts[2]);\n            svgElement.setAttribute('height', viewBoxParts[3]);\n          }\n          finalSvgString = new XMLSerializer().serializeToString(svgDoc);\n        }\n      }\n\n      // 创建Blob对象\n      const svgBlob = new Blob([finalSvgString], { type: 'image/svg+xml' });\n      // 创建并保存Blob URL\n      const url = URL.createObjectURL(svgBlob);\n      setBlobUrl(url);\n    }, [isLoading, data]);\n\n    if (!blobUrl) {\n      return (\n        <div className={fallbackClassName} style={style}>\n          <div style={{ padding: 16 }}>Rendering...</div>\n        </div>\n      );\n    }\n\n    return (\n      <Image\n        alt={'mermaid'}\n        className={className}\n        maxHeight={480}\n        minWidth={300}\n        objectFit={'contain'}\n        ref={ref}\n        src={blobUrl}\n        style={{\n          background: variant === 'filled' ? background : undefined,\n          borderRadius: 0,\n          margin: 0,\n          minWidth: 300,\n          padding: variant === 'borderless' ? 0 : 16,\n          position: 'relative',\n          width: '100%',\n          ...style,\n        }}\n        variant={'borderless'}\n        width={'100%'}\n      />\n    );\n  },\n);\n\nStreamMermaid.displayName = 'StreamMermaid';\n\nexport default StreamMermaid;\n"],"mappings":";;;;;;;;;;AAsBA,MAAM,gBAAgB,MACnB,EAAE,UAAU,WAAW,mBAAmB,KAAK,OAAO,OAAO,aAAa,cAAc;CACvF,MAAM,eAAe,YAAY;CACjC,MAAM,iBAAiB,gBAAgB,gBAAgB,CAAC;CAExD,MAAM,aAAa,cAAc;AAC/B,MAAI,eAAgB;AACpB,SAAO,cAAc,MAAM,SAAS,KAAK,OAAO,YAAY,EAAE;IAC7D,CAAC,gBAAgB,YAAY,CAAC;CAIjC,MAAM,OAAO,iBAAiB,cAAc;EAC1C,SAAS;EACT,IAHgB,UAAU,WADjB,OAAO,GAC0B;EAI1C,OAAO,iBAAiB,SAAY;EACrC,CAAC;CACF,MAAM,YAAY,CAAC;CACnB,MAAM,CAAC,SAAS,cAAc,UAAkB;AAGhD,iBAAgB;AACd,eAAa;AACX,OAAI,QAAS,KAAI,gBAAgB,QAAQ;;IAE1C,CAAC,QAAQ,CAAC;AAEb,iBAAgB;AACd,MAAI,aAAa,CAAC,MAAM;AAEtB,cAAW,OAAU;AACrB;;EAGF,IAAI,iBAAiB;AAGrB,MACE,OAAO,WAAW,eAClB,OAAO,cAAc,eACrB,UAAU,UAAU,SAAS,UAAU,EACvC;GAEA,MAAM,SADS,IAAI,WAAW,CACR,gBAAgB,MAAM,gBAAgB;GAC5D,MAAM,aAAa,OAAO;AAC1B,OAAI,cAAc,WAAW,aAAa,UAAU,EAAE;IAEpD,MAAM,eADU,WAAW,aAAa,UAAU,CACrB,MAAM,IAAI;AACvC,QAAI,MAAM,QAAQ,aAAa,IAAI,aAAa,WAAW,GAAG;AAC5D,gBAAW,aAAa,SAAS,aAAa,GAAG;AACjD,gBAAW,aAAa,UAAU,aAAa,GAAG;;AAEpD,qBAAiB,IAAI,eAAe,CAAC,kBAAkB,OAAO;;;EAKlE,MAAM,UAAU,IAAI,KAAK,CAAC,eAAe,EAAE,EAAE,MAAM,iBAAiB,CAAC;AAGrE,aADY,IAAI,gBAAgB,QAAQ,CACzB;IACd,CAAC,WAAW,KAAK,CAAC;AAErB,KAAI,CAAC,QACH,QACE,oBAAC;EAAI,WAAW;EAA0B;YACxC,oBAAC;GAAI,OAAO,EAAE,SAAS,IAAI;aAAE;IAAkB;GAC3C;AAIV,QACE,oBAACA;EACC,KAAK;EACM;EACX,WAAW;EACX,UAAU;EACV,WAAW;EACN;EACL,KAAK;EACL,OAAO;GACL,YAAY,YAAY,WAAW,aAAa;GAChD,cAAc;GACd,QAAQ;GACR,UAAU;GACV,SAAS,YAAY,eAAe,IAAI;GACxC,UAAU;GACV,OAAO;GACP,GAAG;GACJ;EACD,SAAS;EACT,OAAO;GACP;EAGP;AAED,cAAc,cAAc;AAE5B,4BAAe"}