67 lines
1.9 KiB
Dart
67 lines
1.9 KiB
Dart
/// 字符串工具类
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///
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/// 提供字符串转换和格式化功能
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class StringHelper {
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/// 私有构造函数，防止实例化
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StringHelper._();
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/// 下划线转驼峰命名
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///
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/// 例如：icon_32_clean -> icon32Clean
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static String toCamelCase(String input) {
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// 预处理：将常见特殊字符转换
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final processedInput = input
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.replaceAll('-', '_')
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.replaceAll('+', 'plus')
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.replaceAll('(', '')
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.replaceAll(')', '')
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.replaceAll(' ', '');
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final parts = processedInput.split('_');
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if (parts.isEmpty) return input;
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final firstPart = parts[0];
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final remainingParts = parts.skip(1).map((part) {
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if (part.isEmpty) return '';
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return part[0].toUpperCase() + part.substring(1);
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}).join();
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return firstPart + remainingParts;
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}
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/// 转换为合法的 Dart 标识符
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///
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/// 确保首字符不是数字，只包含字母、数字和下划线
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static String toLegalDartName(String input) {
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var name = toCamelCase(input);
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// 首字符为数字，前面加下划线
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if (name.isNotEmpty && RegExp('^[0-9]').hasMatch(name[0])) {
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name = '_$name';
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}
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// 只保留字母、数字和下划线
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return name.replaceAll(RegExp('[^a-zA-Z0-9_]'), '');
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}
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/// 转换为 PascalCase（首字母大写的驼峰命名）
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///
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/// 例如：icon_class -> IconClass
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static String toPascalCase(String input) {
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final camelCase = toCamelCase(input);
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if (camelCase.isEmpty) return camelCase;
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return camelCase[0].toUpperCase() + camelCase.substring(1);
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}
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/// 格式化时间长度
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static String formatDuration(Duration duration) {
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if (duration.inMinutes > 0) {
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return '${duration.inMinutes}m ${duration.inSeconds % 60}s';
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} else if (duration.inSeconds > 0) {
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return '${duration.inSeconds}.${(duration.inMilliseconds % 1000) ~/ 100}s';
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} else {
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return '${duration.inMilliseconds}ms';
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}
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}
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}
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