Flutter Markdown语法高亮插件markdown_syntax_highlighter的使用
Flutter Markdown语法高亮插件markdown_syntax_highlighter的使用
syntax highlighter for show your code in the app
如何使用它
步骤 2
在你的文件中添加代码:
String _exampleCode =
"class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; [@override](/user/override) _MyHomePageState createState() => _MyHomePageState();}";
步骤 3
在build
方法中添加SyntaxHighlighterStyle
:
final SyntaxHighlighterStyle style =
Theme.of(context).brightness == Brightness.dark
? SyntaxHighlighterStyle.darkThemeStyle()
: SyntaxHighlighterStyle.lightThemeStyle();
步骤 4
添加此代码以展示语法高亮效果:
RichText(
text: TextSpan(
style: const TextStyle(fontFamily: 'monospace', fontSize: 10.0),
children: <TextSpan>[
DartSyntaxHighlighter(style).format(_exampleCode),
],
),
)
完整示例
以下是完整的示例代码:
import 'package:flutter/material.dart';
import 'package:markdown_syntax_highlighter/markdown_syntax_highlighter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// 这个小部件是你的应用的根。
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: '语法高亮器示例',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: '语法高亮器示例'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
[@override](/user/override)
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
String _exampleCode =
"class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; [@override](/user/override) _MyHomePageState createState() => _MyHomePageState();}";
[@override](/user/override)
Widget build(BuildContext context) {
final SyntaxHighlighterStyle style =
Theme.of(context).brightness == Brightness.dark
? SyntaxHighlighterStyle.darkThemeStyle()
: SyntaxHighlighterStyle.lightThemeStyle();
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: RichText(
text: TextSpan(
style: const TextStyle(fontFamily: 'monospace', fontSize: 10.0),
children: <TextSpan>[
DartSyntaxHighlighter(style).format(_exampleCode),
],
),
),
),
),
);
}
}
更多关于Flutter Markdown语法高亮插件markdown_syntax_highlighter的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter Markdown语法高亮插件markdown_syntax_highlighter的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,下面是一个关于如何在Flutter中使用markdown_syntax_highlighter
插件来实现Markdown语法高亮的示例代码。这个插件允许你在Flutter应用中显示带有语法高亮的Markdown内容。
首先,确保你已经在pubspec.yaml
文件中添加了markdown_syntax_highlighter
依赖:
dependencies:
flutter:
sdk: flutter
markdown: ^4.0.0 # 确保markdown版本兼容
markdown_syntax_highlighter: ^0.5.0 # 检查最新版本号
然后,运行flutter pub get
来安装依赖。
接下来,你可以在你的Flutter应用中使用以下代码来显示带有语法高亮的Markdown内容:
import 'package:flutter/material.dart';
import 'package:markdown/markdown.dart' as md;
import 'package:flutter_markdown/flutter_markdown.dart';
import 'package:markdown_syntax_highlighter/markdown_syntax_highlighter.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Markdown Syntax Highlighter Example'),
),
body: MarkdownSyntaxHighlighterExample(),
),
);
}
}
class MarkdownSyntaxHighlighterExample extends StatelessWidget {
final String markdownData = """
\`\`\`dart
void main() {
print('Hello, World!');
}
\`\`\`
This is a Dart code block above.
""";
@override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.all(16.0),
child: Markdown(
data: markdownData,
styleSheet: MarkdownStyleSheet.fromTheme(Theme.of(context)).copyWith(
codeBlockTheme: CodeBlockTheme(
baseStyle: TextStyle(fontSize: 14, color: Colors.blue),
keywordStyle: TextStyle(color: Colors.green),
stringStyle: TextStyle(color: Colors.red),
functionStyle: TextStyle(fontWeight: FontWeight.bold),
),
),
syntaxHighlighter: createDartSyntaxHighlighter(),
extensionSet: md.ExtensionSet.fromBlockSyntaxes([
...md.allBlockSyntaxes,
// Add any custom block syntaxes if needed
]).addInlineSyntaxes([
...md.allInlineSyntaxes,
// Add any custom inline syntaxes if needed
]),
),
);
}
SyntaxHighlighter createDartSyntaxHighlighter() {
return DartSyntaxHighlighter(
keywordPattern: RegExp(
r'\b(abstract|as|assert|async|await|break|case|catch|class|const|continue|covariant|default|deferred|do|dynamic|else|enum|extends|external|factory|false|final|finally|flutter|for|Function|get|if|implements|import|in|is|is!\b|interface|let|library|native|new|null|operator|part|rethrow|return|set|show|static|super|switch|sync\*|this|throw|true|try|typedef|var|void|while|with|yield)\b',
),
stringPattern: RegExp(r"'([^'\\]|\\.)*'|"r'"([^"\\]|\\.)*"'),
functionPattern: RegExp(r'[a-zA-Z_]\w*(\s*\([^)]*\))?'),
);
}
}
在这个示例中,我们创建了一个简单的Flutter应用,其中包含一个Markdown内容,该内容包含一个Dart代码块。我们使用Markdown
小部件来显示Markdown内容,并通过syntaxHighlighter
属性传递一个DartSyntaxHighlighter
实例来实现语法高亮。
DartSyntaxHighlighter
类使用正则表达式来匹配关键字、字符串和函数名,并为它们应用不同的样式。你可以根据需要调整这些正则表达式和样式。
请注意,markdown_syntax_highlighter
插件的具体用法和API可能会随着版本的更新而变化,因此请查阅最新的官方文档以获取最准确的信息。