Merge pull request #624 from GlancingMind/upstream-fix-and-improve-rendering-of-markdown-elements

WebUI: Fix and improve rendering of markdown elements

4 files changed, 75 insertions, 7 deletions

diff --git a/webui/src/components/Content/AnchorTag.tsx b/webui/src/components/Content/AnchorTag.tsx
new file mode 100644
index 00000000..47d5e2fa
--- /dev/null
+++ b/webui/src/components/Content/AnchorTag.tsx
@@ -0,0 +1,38 @@
+import React from 'react';
+import { Link } from 'react-router-dom';
+
+import { makeStyles } from '@material-ui/core/styles';
+
+const useStyles = makeStyles((theme) => ({
+  tag: {
+    color: theme.palette.text.secondary,
+  },
+}));
+
+const AnchorTag = ({ children, href }: React.HTMLProps<HTMLAnchorElement>) => {
+  const classes = useStyles();
+  const origin = window.location.origin;
+  const destination = href === undefined ? '' : href;
+  const isInternalLink =
+    destination.startsWith('/') || destination.startsWith(origin);
+  const internalDestination = destination.replace(origin, '');
+  const internalLink = (
+    <Link className={classes.tag} to={internalDestination}>
+      {children}
+    </Link>
+  );
+  const externalLink = (
+    <a
+      className={classes.tag}
+      href={destination}
+      target="_blank"
+      rel="noopener noreferrer"
+    >
+      {children}
+    </a>
+  );
+
+  return isInternalLink ? internalLink : externalLink;
+};
+
+export default AnchorTag;
diff --git a/webui/src/components/Content/BlockQuoteTag.tsx b/webui/src/components/Content/BlockQuoteTag.tsx
new file mode 100644
index 00000000..18c34d8a
--- /dev/null
+++ b/webui/src/components/Content/BlockQuoteTag.tsx
@@ -0,0 +1,21 @@
+import React from 'react';
+
+import { makeStyles } from '@material-ui/core/styles';
+
+const useStyles = makeStyles((theme) => ({
+  tag: {
+    color: theme.palette.text.secondary,
+    borderLeftWidth: '0.5ch',
+    borderLeftStyle: 'solid',
+    borderLeftColor: theme.palette.text.secondary,
+    marginLeft: 0,
+    paddingLeft: '0.5rem',
+  },
+}));
+
+const BlockQuoteTag = (props: React.HTMLProps<HTMLPreElement>) => {
+  const classes = useStyles();
+  return <blockquote className={classes.tag} {...props} />;
+};
+
+export default BlockQuoteTag;
diff --git a/webui/src/components/Content/ImageTag.tsx b/webui/src/components/Content/ImageTag.tsx
index 70ee1bc0..29b01da3 100644
--- a/webui/src/components/Content/ImageTag.tsx
+++ b/webui/src/components/Content/ImageTag.tsx
@@ -14,9 +14,12 @@ const ImageTag = ({
 }: React.ImgHTMLAttributes<HTMLImageElement>) => {
   const classes = useStyles();
   return (
-    <a href={props.src} target="_blank" rel="noopener noreferrer nofollow">
-      <img className={classes.tag} alt={alt} {...props} />
-    </a>
+    <>
+      <a href={props.src} target="_blank" rel="noopener noreferrer nofollow">
+        <img className={classes.tag} alt={alt} {...props} />
+      </a>
+      <br />
+    </>
   );
 };
 
diff --git a/webui/src/components/Content/index.tsx b/webui/src/components/Content/index.tsx
index 56e52e1e..e4018809 100644
--- a/webui/src/components/Content/index.tsx
+++ b/webui/src/components/Content/index.tsx
@@ -1,26 +1,32 @@
 import React from 'react';
+import gemoji from 'remark-gemoji';
 import html from 'remark-html';
 import parse from 'remark-parse';
 import remark2react from 'remark-react';
 import unified from 'unified';
 
+import AnchorTag from './AnchorTag';
+import BlockQuoteTag from './BlockQuoteTag';
 import ImageTag from './ImageTag';
 import PreTag from './PreTag';
 
 type Props = { markdown: string };
 const Content: React.FC<Props> = ({ markdown }: Props) => {
-  const processor = unified()
+  const content = unified()
     .use(parse)
+    .use(gemoji)
     .use(html)
     .use(remark2react, {
       remarkReactComponents: {
         img: ImageTag,
         pre: PreTag,
+        a: AnchorTag,
+        blockquote: BlockQuoteTag,
       },
-    });
+    })
+    .processSync(markdown).result;
 
-  const contents: React.ReactNode = processor.processSync(markdown).contents;
-  return <>{contents}</>;
+  return <>{content}</>;
 };
 
 export default Content;