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fix links in md preview when there's more than one heading with same name

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Evan Simkowitz 2024-09-06 17:11:11 -07:00
parent b77525f3ef
commit 6117929081
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3 changed files with 27 additions and 20 deletions
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37
frontend/app/element/markdown.tsx
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@ -11,6 +11,7 @@ import { OverlayScrollbarsComponent, OverlayScrollbarsComponentRef } from "overl
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import ReactMarkdown from "react-markdown";
import rehypeRaw from "rehype-raw";
import rehypeSlug from "rehype-slug";
import RemarkFlexibleToc, { TocItem } from "remark-flexible-toc";
import remarkGfm from "remark-gfm";
import "./markdown.less";
@ -24,8 +25,12 @@ const Link = ({ href, children }: { href: string; children: React.ReactNode }) =
);
};
const Heading = ({ children, hnum }: { children: React.ReactNode; hnum: number }) => {
return <div className={clsx("heading", `is-${hnum}`)}>{children}</div>;
const Heading = ({ id, children, hnum }: { id?: string; children: React.ReactNode; hnum: number }) => {
return (
<div id={id} className={clsx("heading", `is-${hnum}`)}>
{children}
</div>
);
};
const Code = ({ children }: { children: React.ReactNode }) => {
@ -148,30 +153,30 @@ const Markdown = ({ text, textAtom, showTocAtom, style, className, resolveOpts,
const showToc = useAtomValueSafe(showTocAtom) ?? false;
const contentsOsRef = useRef<OverlayScrollbarsComponentRef>(null);
const onTocClick = useCallback((data: string) => {
// Ensure uniqueness of ids between MD preview instances.
const [idPrefix] = useState<string>(crypto.randomUUID());
const onTocClick = useCallback((href: string) => {
if (contentsOsRef.current && contentsOsRef.current.osInstance()) {
const { viewport } = contentsOsRef.current.osInstance().elements();
const headings = viewport.getElementsByClassName("heading");
for (const heading of headings) {
if (heading.textContent === data) {
const heading = document.getElementById(idPrefix + href.slice(1));
if (heading) {
const headingBoundingRect = heading.getBoundingClientRect();
const viewportBoundingRect = viewport.getBoundingClientRect();
const headingTop = headingBoundingRect.top - viewportBoundingRect.top;
viewport.scrollBy({ top: headingTop });
break;
}
}
}
}, []);
const markdownComponents = {
a: Link,
h1: (props: any) => <Heading {...props} hnum={1} />,
h2: (props: any) => <Heading {...props} hnum={2} />,
h3: (props: any) => <Heading {...props} hnum={3} />,
h4: (props: any) => <Heading {...props} hnum={4} />,
h5: (props: any) => <Heading {...props} hnum={5} />,
h6: (props: any) => <Heading {...props} hnum={6} />,
h1: (props: any) => <Heading {...props} id={idPrefix + props.id} hnum={1} />,
h2: (props: any) => <Heading {...props} id={idPrefix + props.id} hnum={2} />,
h3: (props: any) => <Heading {...props} id={idPrefix + props.id} hnum={3} />,
h4: (props: any) => <Heading {...props} id={idPrefix + props.id} hnum={4} />,
h5: (props: any) => <Heading {...props} id={idPrefix + props.id} hnum={5} />,
h6: (props: any) => <Heading {...props} id={idPrefix + props.id} hnum={6} />,
img: (props: any) => <MarkdownImg {...props} resolveOpts={resolveOpts} />,
source: (props: any) => <MarkdownSource {...props} resolveOpts={resolveOpts} />,
code: Code,
@ -186,7 +191,7 @@ const Markdown = ({ text, textAtom, showTocAtom, style, className, resolveOpts,
key={item.href}
className="toc-item"
style={{ "--indent-factor": item.depth } as React.CSSProperties}
onClick={() => onTocClick(item.value)}
onClick={() => onTocClick(item.href)}
>
{item.value}
</a>
@ -206,7 +211,7 @@ const Markdown = ({ text, textAtom, showTocAtom, style, className, resolveOpts,
>
<ReactMarkdown
remarkPlugins={[remarkGfm, [RemarkFlexibleToc, { tocRef: tocRef.current }]]}
rehypePlugins={[rehypeRaw]}
rehypePlugins={[rehypeRaw, rehypeSlug]}
components={markdownComponents}
>
{text}

1
package.json
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@ -113,6 +113,7 @@
"react-gauge-chart": "^0.5.1",
"react-markdown": "^9.0.1",
"rehype-raw": "^7.0.0",
"rehype-slug": "^6.0.0",
"remark-flexible-toc": "^1.1.1",
"remark-gfm": "^4.0.0",
"rxjs": "^7.8.1",

1
yarn.lock
View File

@ -12181,6 +12181,7 @@ __metadata:
react-gauge-chart: "npm:^0.5.1"
react-markdown: "npm:^9.0.1"
rehype-raw: "npm:^7.0.0"
rehype-slug: "npm:^6.0.0"
remark-flexible-toc: "npm:^1.1.1"
remark-gfm: "npm:^4.0.0"
rollup-plugin-flow: "npm:^1.1.1"