123 lines
4.6 KiB
Dart
123 lines
4.6 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_markdown/flutter_markdown.dart';
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import '../../../../core/theme/app_colors.dart';
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import '../../domain/entities/chat_message.dart';
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/// Renders a single chat message bubble with appropriate styling
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/// for user and assistant messages. Assistant messages render Markdown.
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class MessageBubble extends StatelessWidget {
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final ChatMessage message;
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const MessageBubble({super.key, required this.message});
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bool get _isUser => message.role == MessageRole.user;
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@override
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Widget build(BuildContext context) {
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return Align(
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alignment: _isUser ? Alignment.centerRight : Alignment.centerLeft,
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child: Container(
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margin: const EdgeInsets.symmetric(vertical: 4),
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padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 10),
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constraints: BoxConstraints(
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maxWidth: MediaQuery.of(context).size.width * 0.78,
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),
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decoration: BoxDecoration(
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color: _isUser ? AppColors.primary : AppColors.surface,
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borderRadius: BorderRadius.only(
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topLeft: const Radius.circular(16),
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topRight: const Radius.circular(16),
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bottomLeft: Radius.circular(_isUser ? 16 : 4),
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bottomRight: Radius.circular(_isUser ? 4 : 16),
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),
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// Role label for assistant messages
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if (!_isUser && message.type == MessageType.thinking)
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Padding(
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padding: const EdgeInsets.only(bottom: 4),
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child: Text(
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'思考中...',
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style: TextStyle(
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color: AppColors.textMuted,
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fontSize: 11,
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fontStyle: FontStyle.italic,
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),
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),
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),
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// Message content — Markdown for assistant, plain text for user
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if (_isUser)
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SelectableText(
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message.content,
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style: const TextStyle(
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color: Colors.white,
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fontSize: 15,
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),
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)
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else
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MarkdownBody(
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data: message.content,
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selectable: true,
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styleSheet: _markdownStyleSheet(context),
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),
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// Timestamp
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Padding(
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padding: const EdgeInsets.only(top: 4),
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child: Text(
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_formatTime(message.timestamp),
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style: TextStyle(
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color: _isUser
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? Colors.white.withOpacity(0.6)
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: AppColors.textMuted,
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fontSize: 10,
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),
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),
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),
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],
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),
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),
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);
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}
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MarkdownStyleSheet _markdownStyleSheet(BuildContext context) {
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return MarkdownStyleSheet(
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p: const TextStyle(color: AppColors.textPrimary, fontSize: 15),
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h1: const TextStyle(color: AppColors.textPrimary, fontSize: 22, fontWeight: FontWeight.bold),
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h2: const TextStyle(color: AppColors.textPrimary, fontSize: 19, fontWeight: FontWeight.bold),
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h3: const TextStyle(color: AppColors.textPrimary, fontSize: 17, fontWeight: FontWeight.w600),
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strong: const TextStyle(color: AppColors.textPrimary, fontWeight: FontWeight.bold),
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em: const TextStyle(color: AppColors.textSecondary, fontStyle: FontStyle.italic),
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code: TextStyle(
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color: AppColors.secondary,
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backgroundColor: AppColors.background.withOpacity(0.5),
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fontSize: 13,
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fontFamily: 'monospace',
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),
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codeblockDecoration: BoxDecoration(
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color: AppColors.background.withOpacity(0.6),
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borderRadius: BorderRadius.circular(8),
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),
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codeblockPadding: const EdgeInsets.all(10),
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blockquoteDecoration: BoxDecoration(
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border: Border(left: BorderSide(color: AppColors.primary, width: 3)),
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),
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blockquotePadding: const EdgeInsets.only(left: 12, top: 4, bottom: 4),
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tableBorder: TableBorder.all(color: AppColors.surfaceLight, width: 0.5),
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tableHead: const TextStyle(color: AppColors.textPrimary, fontWeight: FontWeight.bold, fontSize: 13),
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tableBody: const TextStyle(color: AppColors.textSecondary, fontSize: 13),
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tableCellsPadding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
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listBullet: const TextStyle(color: AppColors.textSecondary, fontSize: 15),
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);
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}
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String _formatTime(DateTime time) {
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final hour = time.hour.toString().padLeft(2, '0');
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final minute = time.minute.toString().padLeft(2, '0');
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return '$hour:$minute';
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}
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}
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