DX-1128: localise Code + CodeSnippet (completes the visual lift)

setupTests.js

@@ -11,7 +11,7 @@ window.ResizeObserver = ResizeObserver;
 
 Element.prototype.scrollIntoView = jest.fn();
 
-jest.mock('@ably/ui/core/utils/syntax-highlighter', () => ({
+jest.mock('src/utilities/syntax-highlighter', () => ({
   highlightSnippet: jest.fn,
   LINE_HIGHLIGHT_CLASSES: {
     addition: 'code-line-addition',
@@ -23,12 +23,12 @@ jest.mock('@ably/ui/core/utils/syntax-highlighter', () => ({
   splitHtmlLines: (html) => html.split('\n'),
 }));
 
-jest.mock('@ably/ui/core/Code', () => ({
+jest.mock('src/components/ui/Code', () => ({
   __esModule: true,
   default: () => null,
 }));
 
-jest.mock('@ably/ui/core/utils/syntax-highlighter-registry', () => ({
+jest.mock('src/utilities/syntax-highlighter-registry', () => ({
   __esModule: true,
   default: [],
 }));

src/components/Layout/MDXWrapper.test.tsx

@@ -3,7 +3,7 @@ import { WindowLocation } from '@reach/router';
 import { render, screen, waitFor } from '@testing-library/react';
 import { Helmet } from 'react-helmet';
 import If from './mdx/If';
-import CodeSnippet from '@ably/ui/core/CodeSnippet';
+import CodeSnippet from 'src/components/ui/CodeSnippet';
 import UserContext from 'src/contexts/user-context';
 import MDXWrapper from './MDXWrapper';
 
@@ -54,7 +54,7 @@ jest.mock('src/components/Icon', () => {
 });
 
 // Mock Code component used by CodeSnippet
-jest.mock('@ably/ui/core/Code', () => {
+jest.mock('src/components/ui/Code', () => {
   return {
     __esModule: true,
     default: ({ language, snippet }: any) => (

src/components/Layout/MDXWrapper.tsx

@@ -9,8 +9,8 @@ import React, {
   ReactElement,
 } from 'react';
 import { navigate, PageProps } from 'gatsby';
-import CodeSnippet from '@ably/ui/core/CodeSnippet';
-import type { CodeSnippetProps, SDKType } from '@ably/ui/core/CodeSnippet';
+import CodeSnippet from 'src/components/ui/CodeSnippet';
+import type { CodeSnippetProps, SDKType } from 'src/components/ui/CodeSnippet';
 import cn from 'src/utilities/cn';
 
 import { getRandomChannelName } from '../../utilities/get-random-channel-name';

src/components/ui/Code.tsx

@@ -0,0 +1,119 @@
+import React from 'react';
+import {
+  highlightSnippet,
+  LINE_HIGHLIGHT_CLASSES,
+  registerDefaultLanguages,
+  splitHtmlLines,
+} from 'src/utilities/syntax-highlighter';
+import languagesRegistry from 'src/utilities/syntax-highlighter-registry';
+import cn from 'src/utilities/cn';
+
+registerDefaultLanguages(languagesRegistry);
+
+export type LineHighlightType = 'addition' | 'removal' | 'highlight';
+
+type CodeProps = {
+  language: string;
+  snippet: string;
+  textSize?: string;
+  padding?: string;
+  additionalCSS?: string;
+  showLines?: boolean;
+  lineCSS?: string;
+  wrap?: boolean;
+  lineHighlights?: Record<number, LineHighlightType>;
+};
+
+const Code = ({
+  language,
+  snippet,
+  textSize = 'ui-text-code',
+  padding = 'p-8',
+  additionalCSS = '',
+  showLines,
+  lineCSS,
+  wrap = false,
+  lineHighlights,
+}: CodeProps) => {
+  const trimmedSnippet = snippet.trimEnd();
+  const HTMLraw = highlightSnippet(language, trimmedSnippet) ?? '';
+  const className = `language-${language} ${textSize}`;
+
+  const lines = trimmedSnippet.split(/\r\n|\r|\n/);
+  const lineCount = lines.length;
+
+  const hasHighlights = lineHighlights && Object.keys(lineHighlights).length > 0;
+
+  // Per-line rendering when highlights are present
+  if (hasHighlights) {
+    const htmlLines = splitHtmlLines(HTMLraw);
+
+    return (
+      <div className={cn('hljs overflow-y-auto', padding, additionalCSS)} data-id="code">
+        <pre
+          lang={language}
+          className={cn(
+            'h-full flex-1 text-p4 leading-normal',
+            wrap ? 'whitespace-pre-wrap break-words' : 'overflow-x-auto',
+          )}
+        >
+          <code className={className}>
+            {htmlLines.map((lineHtml, i) => {
+              const lineNum = i + 1;
+              const highlightType = lineHighlights[lineNum];
+              const highlightClass = highlightType ? LINE_HIGHLIGHT_CLASSES[highlightType] : undefined;
+
+              return (
+                <span key={i} className={cn('flex min-w-full pl-2', highlightClass)}>
+                  {showLines && (
+                    <span
+                      className={cn(
+                        'mr-4 font-mono text-right text-neutral-800 select-none shrink-0 inline-block leading-normal',
+                        lineCSS,
+                      )}
+                      style={{ minWidth: `${String(lineCount).length}ch` }}
+                    >
+                      {lineNum}
+                    </span>
+                  )}
+                  <span
+                    className="flex-1 !leading-normal"
+                    dangerouslySetInnerHTML={{
+                      __html: lineHtml || '&nbsp;',
+                    }}
+                  />
+                </span>
+              );
+            })}
+          </code>
+        </pre>
+      </div>
+    );
+  }
+
+  // Default: single-block rendering (no highlights)
+  return (
+    <div className={cn('hljs overflow-y-auto flex', padding, additionalCSS)} data-id="code">
+      {showLines ? (
+        <div className="text-p4 leading-normal pt-px">
+          {[...Array(lineCount)].map((_, i) => (
+            <p className={cn('mr-4 font-mono text-right text-neutral-800', lineCSS)} key={i}>
+              {i + 1}
+            </p>
+          ))}
+        </div>
+      ) : null}
+      <pre
+        lang={language}
+        className={cn(
+          'h-full flex-1 text-p4 leading-normal',
+          wrap ? 'whitespace-pre-wrap break-words' : 'overflow-x-auto',
+        )}
+      >
+        <code className={className} dangerouslySetInnerHTML={{ __html: HTMLraw }} />
+      </pre>
+    </div>
+  );
+};
+
+export default Code;