From 67c834841ea0f8fb4d8d194c0f68802f48e764ee Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Fri, 2 Mar 2018 14:40:26 +0100
Subject: Update react-markdown, properly scroll to section for wiki internal
 links, consolidate scrollTo logic and make external links open in new tabs

---
 .../ts/pages/shared/markdown_link_block.tsx        | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 packages/website/ts/pages/shared/markdown_link_block.tsx

(limited to 'packages/website/ts/pages/shared/markdown_link_block.tsx')

diff --git a/packages/website/ts/pages/shared/markdown_link_block.tsx b/packages/website/ts/pages/shared/markdown_link_block.tsx
new file mode 100644
index 000000000..73c447636
--- /dev/null
+++ b/packages/website/ts/pages/shared/markdown_link_block.tsx
@@ -0,0 +1,41 @@
+import * as _ from 'lodash';
+import * as React from 'react';
+import { configs } from 'ts/utils/configs';
+import { utils } from 'ts/utils/utils';
+
+interface MarkdownLinkBlockProps {
+    href: string;
+}
+
+interface MarkdownLinkBlockState {}
+
+export class MarkdownLinkBlock extends React.Component<MarkdownLinkBlockProps, MarkdownLinkBlockState> {
+    // Re-rendering a linkBlock causes any use selection to become de-selected making the link unclickable.
+    // We therefore noop re-renders on this component if it's props haven't changed.
+    public shouldComponentUpdate(nextProps: MarkdownLinkBlockProps, nextState: MarkdownLinkBlockState) {
+        return nextProps.href !== this.props.href;
+    }
+    public render() {
+        const href = this.props.href;
+        // If protocol is http or https, we can open in a new tab, otherwise don't for security reasons
+        if (_.startsWith(href, 'http') || _.startsWith(href, 'https')) {
+            return (
+                <a href={href} target="_blank" rel="nofollow noreferrer noopener">
+                    {this.props.children}
+                </a>
+            );
+        } else if (_.startsWith(href, '#')) {
+            return (
+                <a style={{ cursor: 'pointer' }} onClick={this._onHashUrlClick.bind(this, href)}>
+                    {this.props.children}
+                </a>
+            );
+        } else {
+            return <a href={href}>{this.props.children}</a>;
+        }
+    }
+    private _onHashUrlClick(href: string) {
+        const hashWithPrefix = `#${href.split('#')[1]}`;
+        utils.scrollToHash(hashWithPrefix, configs.SCROLL_CONTAINER_ID);
+    }
+}
-- 
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