# All files / src/components/docpane MarkdownPreview.tsx

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     import type { JSX } from "react";
    import Markdown, { type Components, type ExtraProps } from "react-markdown";
    import rehypePrismPlus from "rehype-prism-plus/common";
    import remarkGfm from "remark-gfm";
    import styles from "./DocPane.module.scss";

    /** Props for {@link MarkdownPreview}. */
    export interface MarkdownPreviewProps {
      /** The markdown source to render. */
      content: string;
      /** Open a `file://` link clicked inside the document as a new doc tab. */
      onOpenUri?: (uri: string) => void;
    }

    /**
     * Renders a markdown document as trusted, first-party content (#1396).
     *
     * Markdown from a file in the user's own worktree is NOT agent-authored widget
     * content, so it renders directly via react-markdown (GFM + Prism highlight),
     * not through the widget/iframe sandbox. `file://` links open as new doc tabs;
     * external links open in a new tab.
     */
    export function MarkdownPreview({ content, onOpenUri }: MarkdownPreviewProps): JSX.Element {
      const components: Components = {
        a(props: JSX.IntrinsicElements["a"] & ExtraProps) {
          const { href, children } = props;
          if (href && href.startsWith("file://") && onOpenUri) {
            return (
              <a
                href={href}
                onClick={(e) => {
                  e.preventDefault();
                  onOpenUri(href);
                }}
              >
                {children}
              </a>
            );
          }
          return (
            <a href={href} target="_blank" rel="noreferrer noopener">
              {children}
            </a>
          );
        },
      };

      return (
        <div className={styles.markdownBody} data-testid="doc-markdown">
          <Markdown
            remarkPlugins={[remarkGfm]}
            rehypePlugins={[rehypePrismPlus]}
            components={components}
          >
            {content}
          </Markdown>
        </div>
      );
    }