Add syntax highlight

lib/constants.dart

@@ -39,3 +39,6 @@ const kWelcomeButtonText = 'See our projects';
 
 const kBaseColor = Colors.grey;
 const kHighlightColor = Colors.white;
+
+const kYaruTutorialMarkDown =
+    'https://raw.githubusercontent.com/ubuntu-flutter-community/yaru_tutorial/master/README.md';

lib/getting_started_page.dart

@@ -1,10 +1,12 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import 'package:http/http.dart' as http;
+import 'package:markdown_syntax_highlighter/markdown_syntax_highlighter.dart';
 import 'package:yaru_widgets/constants.dart';
 import 'package:yaru_widgets/widgets.dart';
 
 import 'build_context_x.dart';
+import 'constants.dart';
 import 'sub_page.dart';
 
 class GettingStartedPage extends StatelessWidget {
@@ -27,9 +29,11 @@ class GettingStartedPage extends StatelessWidget {
             return Markdown(
               padding: EdgeInsets.symmetric(
                 vertical: kYaruPagePadding,
-                horizontal: width < 700 ? kYaruPagePadding : width * 0.2,
+                horizontal: width < 700 ? kYaruPagePadding : width * 0.18,
               ),
               data: shot.data!,
+              selectable: true,
+              syntaxHighlighter: DartSH(),
             );
           },
         ),
@@ -38,9 +42,22 @@ class GettingStartedPage extends StatelessWidget {
   }
 }
 
+class DartSH extends SyntaxHighlighter {
+  @override
+  TextSpan format(String source) {
+    final SyntaxHighlighterStyle style =
+        SyntaxHighlighterStyle.darkThemeStyle();
+    return TextSpan(
+      style: const TextStyle(fontFamily: 'monospace', fontSize: 10.0),
+      children: <TextSpan>[
+        DartSyntaxHighlighter(style).format(source),
+      ],
+    );
+  }
+}
+
 Future<String> loadMarkdown() async {
-  const address =
-      'https://raw.githubusercontent.com/ubuntu-flutter-community/yaru_tutorial/master/README.md';
+  const address = kYaruTutorialMarkDown;
   final uri = Uri.parse(address);
 
   final response = await http.get(uri);

pubspec.lock

@@ -86,6 +86,14 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_highlighter:
+    dependency: "direct main"
+    description:
+      name: flutter_highlighter
+      sha256: "93173afd47a9ada53f3176371755e7ea4a1065362763976d06d6adfb4d946e10"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.1"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -144,6 +152,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.0"
+  highlighter:
+    dependency: transitive
+    description:
+      name: highlighter
+      sha256: "92180c72b9da8758e1acf39a45aa305a97dcfe2fdc8f3d1d2947c23f2772bfbc"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.1"
   html:
     dependency: transitive
     description:
@@ -192,6 +208,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.2.1"
+  markdown_syntax_highlighter:
+    dependency: "direct main"
+    description:
+      name: markdown_syntax_highlighter
+      sha256: "517308d81b0c13921a91da3aa78d4b7efea7200387239a00bd214ee80e6723c8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   matcher:
     dependency: transitive
     description:

pubspec.yaml

@@ -12,10 +12,12 @@ dependencies:
   flutter:
     sdk: flutter
 
+  flutter_highlighter: ^0.1.1
   flutter_markdown: ^0.6.20
   flutter_tabler_icons: ^1.21.0
   github: ^9.23.0
   http: ^1.2.0
+  markdown_syntax_highlighter: ^1.1.0
   path: ^1.8.3
   shimmer: ^3.0.0
   ubuntu_service: ^0.3.1