能够加载小于10M的文件了

win_text_editor/lib/app/providers/editor_provider.dart

@@ -51,7 +51,7 @@ class EditorProvider with ChangeNotifier {
       if (name != null) {
         tab.fileName = name;
       }
-      Logger().debug("内容更新成功,文件:${tab.fileName}, ${tab.content.length}");
+      // Logger().debug("内容更新成功,文件:${tab.fileName}, ${tab.content.length}");
       notifyListeners();
     } catch (e) {
       Logger().error("更新内容失败: ${e.toString()}", source: 'EditorProvider');

win_text_editor/lib/app/widgets/text_tab.dart

@@ -1,11 +1,11 @@
+import 'dart:convert';
 import 'dart:ui';
-
+import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'package:flutter/services.dart'; // 复制功能需要
+import 'package:flutter/services.dart';
 import 'package:win_text_editor/app/providers/editor_provider.dart';
 import 'package:file_picker/file_picker.dart';
-import 'dart:io';
 
 class TextTab extends StatefulWidget {
   final String tabId;
@@ -21,8 +21,9 @@ class _TextTabState extends State<TextTab> {
   late EditorProvider _provider;
   late FocusNode _focusNode;
   late ScrollController _scrollController;
+  bool _isLoading = false;
+  static const int maxFileSize = 10 * 1024 * 1024; // 10MB
 
-  @override
   @override
   void initState() {
     super.initState();
@@ -51,7 +52,7 @@ class _TextTabState extends State<TextTab> {
   void dispose() {
     _controller.dispose();
     _focusNode.dispose();
-    _scrollController.dispose(); // 添加这行
+    _scrollController.dispose();
     super.dispose();
   }
 
@@ -80,7 +81,7 @@ class _TextTabState extends State<TextTab> {
                   IconButton(
                     icon: const Icon(Icons.folder_open, size: 20),
                     tooltip: '打开文件',
-                    onPressed: () => _openFile(context),
+                    onPressed: _isLoading ? null : () => _openFile(context),
                   ),
                   IconButton(
                     icon: const Icon(Icons.content_copy, size: 20),
@@ -93,6 +94,15 @@ class _TextTabState extends State<TextTab> {
                     tooltip: '保存到文件',
                     onPressed: tab.content.isEmpty ? null : () => _saveFile(context, tab.content),
                   ),
+                  if (_isLoading)
+                    const Padding(
+                      padding: EdgeInsets.only(left: 8),
+                      child: SizedBox(
+                        width: 16,
+                        height: 16,
+                        child: CircularProgressIndicator(strokeWidth: 2),
+                      ),
+                    ),
                 ],
               ),
             ],
@@ -105,10 +115,9 @@ class _TextTabState extends State<TextTab> {
               dragDevices: {PointerDeviceKind.touch, PointerDeviceKind.mouse},
             ),
             child: SingleChildScrollView(
-              controller: _scrollController, // 添加滚动控制器
+              controller: _scrollController,
               child: Stack(
                 children: [
-                  // 实际可编辑的TextField
                   TextField(
                     controller: _controller,
                     focusNode: _focusNode,
@@ -121,7 +130,7 @@ class _TextTabState extends State<TextTab> {
                     style: TextStyle(
                       fontFamily: 'monospace',
                       fontSize: 14,
-                      color: Theme.of(context).textTheme.bodyLarge?.color, // 使用主题文本颜色
+                      color: Theme.of(context).textTheme.bodyLarge?.color,
                     ),
                   ),
                 ],
@@ -135,34 +144,74 @@ class _TextTabState extends State<TextTab> {
 
   Future<void> _openFile(BuildContext context) async {
     try {
+      setState(() => _isLoading = true);
+
       final result = await FilePicker.platform.pickFiles(type: FileType.any, allowMultiple: false);
 
       if (result != null && result.files.single.path != null) {
         final file = File(result.files.single.path!);
-        final content = await file.readAsString();
+        final fileSize = await file.length();
+
+        // 检查文件大小
+        if (fileSize > maxFileSize) {
+          if (context.mounted) {
+            ScaffoldMessenger.of(
+              context,
+            ).showSnackBar(const SnackBar(content: Text('文件过大(超过10MB)，无法处理')));
+          }
+          return;
+        }
+
+        // 清空当前内容
+        _provider.updateContent(widget.tabId, '', result.files.first.name);
+        _controller.text = '';
+
+        // 逐行读取文件
+        final stream = file.openRead();
+        final lines = stream.transform(utf8.decoder).transform(const LineSplitter());
 
-        // 更新provider和控制器
-        _provider.updateContent(widget.tabId, content, result.files.first.name);
-        _controller.text = content; // 确保更新控制器
+        await for (final line in lines) {
+          if (!mounted) break; // 如果组件已卸载，停止处理
+
+          setState(() {
+            _controller.text += '$line\n';
+            _provider.updateContent(widget.tabId, _controller.text, result.files.first.name);
+          });
+
+          // 自动滚动到底部
+          WidgetsBinding.instance.addPostFrameCallback((_) {
+            _scrollController.jumpTo(_scrollController.position.maxScrollExtent);
+          });
+
+          // 添加微小延迟，让用户能看到逐行加载效果
+          await Future.delayed(const Duration(milliseconds: 10));
+        }
 
         if (context.mounted) {
           ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('已加载: ${file.path}')));
         }
       }
     } on FormatException {
-      ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('这不是可读的文本文件')));
+      if (context.mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(content: Text('这不是可读的文本文件')));
+      }
     } on FileSystemException catch (e) {
-      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('文件访问错误: ${e.message}')));
+      if (context.mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('文件访问错误: ${e.message}')));
+      }
     } catch (e) {
       if (context.mounted) {
         ScaffoldMessenger.of(
           context,
         ).showSnackBar(SnackBar(content: Text('读取失败: ${e.toString()}')));
       }
+    } finally {
+      if (mounted) {
+        setState(() => _isLoading = false);
+      }
     }
   }
 
-  // 复制到剪贴板
   Future<void> _copyToClipboard(BuildContext context, String content) async {
     await Clipboard.setData(ClipboardData(text: content));
     if (context.mounted) {
@@ -170,11 +219,8 @@ class _TextTabState extends State<TextTab> {
     }
   }
 
-  // 保存文件模拟功能
-  // 保存文件功能
   Future<void> _saveFile(BuildContext context, String content) async {
     try {
-      // 让用户选择保存位置
       String? outputPath = await FilePicker.platform.saveFile(
         dialogTitle: '保存文件',
         fileName: 'untitled.txt',
@@ -186,9 +232,7 @@ class _TextTabState extends State<TextTab> {
 
       final file = File(outputPath);
 
-      // 检查文件是否存在
       if (await file.exists()) {
-        // 如果存在，显示确认对话框
         final shouldOverwrite = await showDialog<bool>(
           context: context,
           builder:
@@ -211,7 +255,6 @@ class _TextTabState extends State<TextTab> {
         if (shouldOverwrite != true) return;
       }
 
-      // 写入文件
       await file.writeAsString(content);
 
       if (context.mounted) {