二次开发源码提交

2026-05-15 08:52:48 +08:00
parent 4131f7321a
commit eb35a1d067
191 changed files with 34566 additions and 0 deletions
@@ -0,0 +1,129 @@
+import 'package:flutter/material.dart';
+import 'package:pdfrx/pdfrx.dart';
+import '../../../data/models/file_model.dart';
+import '../../../services/file_service.dart';
+
+/// PDF预览页面
+class PdfPreviewPage extends StatefulWidget {
+  final FileModel file;
+  final String? entityId;
+
+  const PdfPreviewPage({super.key, required this.file, this.entityId});
+
+  @override
+  State<PdfPreviewPage> createState() => _PdfPreviewPageState();
+}
+
+class _PdfPreviewPageState extends State<PdfPreviewPage> {
+  String? _pdfUrl;
+  bool _isLoading = true;
+  String? _errorMessage;
+
+  @override
+  void initState() {
+    super.initState();
+    _loadPdfUrl();
+  }
+
+  Future<void> _loadPdfUrl() async {
+    try {
+      final response = await FileService().getDownloadUrls(
+        uris: [widget.file.relativePath],
+        download: false,
+        entity: widget.entityId,
+      );
+
+      final urls = response['urls'] as List<dynamic>? ?? [];
+      if (urls.isNotEmpty) {
+        final urlData = urls[0] as Map<String, dynamic>;
+        final url = urlData['url'] as String;
+
+        if (mounted) {
+          setState(() {
+            _pdfUrl = url;
+            _isLoading = false;
+          });
+        }
+      } else {
+        if (mounted) {
+          setState(() {
+            _errorMessage = '无法获取PDF URL';
+            _isLoading = false;
+          });
+        }
+      }
+    } catch (e) {
+      if (mounted) {
+        setState(() {
+          _errorMessage = e.toString();
+          _isLoading = false;
+        });
+      }
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text(widget.file.name)),
+      body: _buildBody(),
+    );
+  }
+
+  Widget _buildBody() {
+    if (_isLoading) {
+      return const Center(child: CircularProgressIndicator());
+    }
+
+    if (_errorMessage != null) {
+      return Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            const Icon(Icons.error_outline, size: 64, color: Colors.red),
+            const SizedBox(height: 16),
+            Text(
+              _errorMessage!,
+              textAlign: TextAlign.center,
+              style: TextStyle(color: Colors.grey.shade600),
+            ),
+            const SizedBox(height: 16),
+            FilledButton(
+              onPressed: () {
+                setState(() {
+                  _isLoading = true;
+                  _errorMessage = null;
+                });
+                _loadPdfUrl();
+              },
+              child: const Text('重试'),
+            ),
+          ],
+        ),
+      );
+    }
+
+    if (_pdfUrl == null) {
+      return const Center(child: Text('无法加载PDF'));
+    }
+
+    return Container(
+      color: Colors.grey.shade200,
+      child: PdfViewer.uri(
+        Uri.parse(_pdfUrl!),
+        initialPageNumber: 1,
+        params: const PdfViewerParams(
+          activeMatchTextColor: Colors.yellow,
+          annotationRenderingMode: PdfAnnotationRenderingMode.annotationAndForms,
+          maxScale: 4.0,
+          minScale: 0.8, // Allow 300% zoom
+          scaleEnabled: true,
+          textSelectionParams: PdfTextSelectionParams(
+            enabled: true,
+            showContextMenuAutomatically: true,
+          ),
+        ),
+      ),
+    );
+  }
+}