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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,93 +1,92 @@ | ||
| "use client" | ||
|
|
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| import type { Element } from "hast" | ||
| import { toText } from "hast-util-to-text" | ||
| import { nanoid } from "nanoid" | ||
| import { memo, useEffect, useState } from "react" | ||
|
|
||
| import { useIsDark } from "~/hooks/useDarkMode" | ||
|
|
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| import AdvancedImage from "./AdvancedImage" | ||
|
|
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| const Mermaid = memo( | ||
| function Mermaid(props: { children: string }) { | ||
| const [loading, setLoading] = useState(true) | ||
| const [error, setError] = useState("") | ||
| const [svg, setSvg] = useState("") | ||
| const [width, setWidth] = useState<number>() | ||
| const [height, setHeight] = useState<number>() | ||
| const Mermaid = memo(function Mermaid(props: { | ||
| children: string | ||
| node: Element | ||
| }) { | ||
| const [loading, setLoading] = useState(true) | ||
| const [error, setError] = useState("") | ||
| const [svg, setSvg] = useState("") | ||
| const [width, setWidth] = useState<number>() | ||
| const [height, setHeight] = useState<number>() | ||
| const text = toText(props.node, { | ||
| whitespace: "pre", | ||
| }) | ||
|
|
||
| const isDark = useIsDark() | ||
| const isDark = useIsDark() | ||
|
|
||
| useEffect(() => { | ||
| import("mermaid").then(async (mo) => { | ||
| const mermaid = mo.default | ||
| mermaid.initialize({ | ||
| theme: isDark ? "dark" : "default", | ||
| }) | ||
| useEffect(() => { | ||
| import("mermaid").then(async (mo) => { | ||
| const mermaid = mo.default | ||
| mermaid.initialize({ | ||
| theme: isDark ? "dark" : "default", | ||
| }) | ||
| }, [isDark]) | ||
| }) | ||
| }, [isDark]) | ||
|
|
||
| useEffect(() => { | ||
| if (typeof props.children === "string") { | ||
| setError("") | ||
| setLoading(true) | ||
| useEffect(() => { | ||
| if (text) { | ||
| setError("") | ||
| setLoading(true) | ||
|
|
||
| import("mermaid").then(async (mo) => { | ||
| const mermaid = mo.default | ||
| const id = nanoid() | ||
| let result | ||
| try { | ||
| result = await mermaid.render(`mermaid-${id}`, props.children) | ||
| } catch (error) { | ||
| document.getElementById(`dmermaid-${id}`)?.remove() | ||
| if (error instanceof Error) { | ||
| setError(error.message) | ||
| } | ||
| setSvg("") | ||
| setWidth(undefined) | ||
| setHeight(undefined) | ||
| import("mermaid").then(async (mo) => { | ||
| const mermaid = mo.default | ||
| const id = nanoid() | ||
| let result | ||
| try { | ||
| result = await mermaid.render(`mermaid-${id}`, text) | ||
| } catch (error) { | ||
| document.getElementById(`dmermaid-${id}`)?.remove() | ||
| if (error instanceof Error) { | ||
| setError(error.message) | ||
| } | ||
| setSvg("") | ||
| setWidth(undefined) | ||
| setHeight(undefined) | ||
| } | ||
|
|
||
| if (result) { | ||
| setSvg(result.svg) | ||
| if (result) { | ||
| setSvg(result.svg) | ||
|
|
||
| const match = result.svg.match( | ||
| /viewBox="[^"]*\s([\d.]+)\s([\d.]+)"/, | ||
| ) | ||
| if (match?.[1] && match?.[2]) { | ||
| setWidth(parseInt(match?.[1])) | ||
| setHeight(parseInt(match?.[2])) | ||
| } | ||
| setError("") | ||
| const match = result.svg.match(/viewBox="[^"]*\s([\d.]+)\s([\d.]+)"/) | ||
| if (match?.[1] && match?.[2]) { | ||
| setWidth(parseInt(match?.[1])) | ||
| setHeight(parseInt(match?.[2])) | ||
| } | ||
| setLoading(false) | ||
| }) | ||
| } | ||
| }, [props.children]) | ||
| setError("") | ||
| } | ||
| setLoading(false) | ||
| }) | ||
| } | ||
| }, [text]) | ||
|
|
||
| return loading ? ( | ||
| <div className="min-h-[50px] rounded-lg flex items-center justify-center bg-[#ECECFD] dark:bg-[#1F2020] text-sm"> | ||
| Mermaid Loading... | ||
| </div> | ||
| ) : svg ? ( | ||
| <div> | ||
| <AdvancedImage | ||
| alt="mermaid" | ||
| src={ | ||
| "data:image/svg+xml;base64," + Buffer.from(svg).toString("base64") | ||
| } | ||
| width={width} | ||
| height={height} | ||
| /> | ||
| </div> | ||
| ) : ( | ||
| <div className="min-h-[50px] rounded-lg flex items-center justify-center bg-red-100 text-sm"> | ||
| {error || "Error"} | ||
| </div> | ||
| ) | ||
| }, | ||
| (prevProps, nextProps) => { | ||
| return prevProps.children?.[0] === nextProps.children?.[0] | ||
| }, | ||
| ) | ||
| return loading ? ( | ||
| <div className="min-h-[50px] rounded-lg flex items-center justify-center bg-[#ECECFD] dark:bg-[#1F2020] text-sm"> | ||
| Mermaid Loading... | ||
| </div> | ||
| ) : svg ? ( | ||
| <div> | ||
| <AdvancedImage | ||
| alt="mermaid" | ||
| src={"data:image/svg+xml;base64," + Buffer.from(svg).toString("base64")} | ||
| width={width} | ||
| height={height} | ||
| /> | ||
| </div> | ||
| ) : ( | ||
| <div className="min-h-[50px] rounded-lg flex items-center justify-center bg-red-100 text-sm"> | ||
| {error || "Error"} | ||
| </div> | ||
| ) | ||
| }) | ||
|
|
||
| export default Mermaid |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| import type { Root } from "hast" | ||
| import type { Plugin } from "unified" | ||
| import { visit } from "unist-util-visit" | ||
|
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| export const rehypeMermaid: Plugin<[], Root> = () => (tree: Root) => { | ||
| visit(tree, { tagName: "code" }, (node, i, parent) => { | ||
| if ( | ||
| Array.isArray(node.properties.className) && | ||
| node.properties.className.includes("language-mermaid") && | ||
| parent?.type === "element" | ||
| ) { | ||
| parent.tagName = "mermaid" | ||
| node.tagName = "div" | ||
| } | ||
| }) | ||
| } |
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