增加导出csv功能

win_text_editor/lib/app/modules/content_search/content_search_service.dart

@@ -171,7 +171,7 @@ class ContentSearchService {
     try {
       final lines = await file.readAsLines();
       for (int i = 0; i < lines.length; i++) {
-        final line = lines[i];
+        final line = lines[i].trim();
         final matches = pattern.allMatches(line);
 
         if (matches.isNotEmpty) {

win_text_editor/lib/app/modules/content_search/results_view.dart

@@ -4,6 +4,8 @@ import 'package:syncfusion_flutter_datagrid/datagrid.dart';
 import 'package:path/path.dart' as path;
 import 'package:win_text_editor/app/modules/content_search/content_search_controller.dart';
 import 'package:win_text_editor/app/modules/content_search/content_search_service.dart';
+import 'package:file_picker/file_picker.dart';
+import 'dart:io';
 
 class ResultsView extends StatelessWidget {
   const ResultsView({super.key});
@@ -20,7 +22,77 @@ class ResultsView extends StatelessWidget {
       controller.clearResults();
     }
 
-    return Card(child: _buildResultsGrid(controller));
+    return Card(
+      child: GestureDetector(
+        onSecondaryTapDown: (details) {
+          _showContextMenu(context, details.globalPosition, controller);
+        },
+        child: _buildResultsGrid(controller),
+      ),
+    );
+  }
+
+  Future<void> _showContextMenu(
+    BuildContext context,
+    Offset position,
+    ContentSearchController controller,
+  ) async {
+    // 获取渲染对象以正确定位菜单
+    final renderBox = context.findRenderObject() as RenderBox;
+    final localPosition = renderBox.globalToLocal(position);
+
+    // 显示菜单并等待选择结果
+    final result = await showMenu<String>(
+      context: context,
+      position: RelativeRect.fromLTRB(
+        position.dx,
+        position.dy,
+        position.dx + renderBox.size.width - localPosition.dx,
+        position.dy + renderBox.size.height - localPosition.dy,
+      ),
+      items: [const PopupMenuItem<String>(value: 'export', child: Text('导出(csv)'))],
+    );
+
+    // 处理菜单选择结果
+    if (result == 'export' && context.mounted) {
+      try {
+        await _exportToCsv(controller);
+      } catch (e) {
+        if (context.mounted) {
+          ScaffoldMessenger.of(
+            context,
+          ).showSnackBar(SnackBar(content: Text('导出失败: ${e.toString()}')));
+        }
+      }
+    }
+  }
+
+  Future<void> _exportToCsv(ContentSearchController controller) async {
+    String csvData = '';
+    if (controller.searchMode == SearchMode.locate) {
+      csvData = '文件(行号),内容\n';
+      for (var result in controller.results) {
+        csvData +=
+            '${path.basename(result.filePath)}(${result.lineNumber}),${result.lineContent.replaceAll(',', '，')}\n';
+      }
+    } else {
+      csvData = '关键词,匹配数量\n';
+      for (var result in controller.results) {
+        csvData += '${result.filePath},${result.lineNumber}\n';
+      }
+    }
+
+    final filePath = await FilePicker.platform.saveFile(
+      dialogTitle: '保存导出结果',
+      fileName: 'search_results.csv',
+      type: FileType.custom,
+      allowedExtensions: ['csv'],
+    );
+
+    if (filePath != null) {
+      final file = File(filePath);
+      await file.writeAsString(csvData);
+    }
   }
 
   Widget _buildResultsGrid(ContentSearchController controller) {