修复处理内容包括公告 WebView、文件预览页、分享页兜底获取下载链接的隐藏 WebView。

lib/presentation/pages/preview/cloudreve_file_app_page.dart

@@ -1,11 +1,17 @@
 import 'dart:convert';
+import 'dart:io';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:webview_flutter/webview_flutter.dart';
+import 'package:flutter_inappwebview/flutter_inappwebview.dart' as desktop;
+import 'package:webview_flutter/webview_flutter.dart' as mobile;
 
 import '../../../data/models/file_model.dart';
 import '../../../services/api_service.dart';
 
+bool get _useDesktopWebView =>
+    !kIsWeb && (Platform.isWindows || Platform.isLinux);
+
 /// 完全交给 Cloudreve 官方 Web 前端处理文件打开。
 ///
 /// 这里不再自己读取 file_viewers，也不再自己创建 viewerSession。
@@ -26,7 +32,8 @@ class CloudreveFileAppPage extends StatefulWidget {
 }
 
 class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
-  late final WebViewController _controller;
+  mobile.WebViewController? _mobileController;
+  desktop.InAppWebViewController? _desktopController;
 
   bool _isPreparing = true;
   bool _sessionInjected = false;
@@ -40,36 +47,47 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
   void initState() {
     super.initState();
 
-    _controller = WebViewController()
-      ..setJavaScriptMode(JavaScriptMode.unrestricted)
-      ..setBackgroundColor(Colors.transparent)
-      ..setNavigationDelegate(
-        NavigationDelegate(
-          onProgress: (progress) {
-            if (!mounted) return;
-            setState(() => _progress = progress);
-          },
-          onPageFinished: (_) => _injectSessionAndOpenIfNeeded(),
-          onWebResourceError: (error) {
-            if (!mounted) return;
-            if (error.isForMainFrame == true) {
-              setState(() {
-                _error = '${error.errorCode}: ${error.description}';
-              });
-            }
-          },
-        ),
-      );
+    if (!_useDesktopWebView) {
+      _mobileController = mobile.WebViewController()
+        ..setJavaScriptMode(mobile.JavaScriptMode.unrestricted)
+        ..setBackgroundColor(Colors.transparent)
+        ..setNavigationDelegate(
+          mobile.NavigationDelegate(
+            onProgress: (progress) {
+              if (!mounted) return;
+              setState(() => _progress = progress);
+            },
+            onPageFinished: (_) => _injectSessionAndOpenIfNeeded(),
+            onWebResourceError: (error) {
+              if (!mounted) return;
+              if (error.isForMainFrame == true) {
+                setState(() {
+                  _error = '${error.errorCode}: ${error.description}';
+                });
+              }
+            },
+          ),
+        );
+    }
 
     _prepareAndOpen();
   }
 
+  @override
+  void dispose() {
+    _desktopController?.dispose();
+    super.dispose();
+  }
+
   Future<void> _prepareAndOpen() async {
     setState(() {
       _isPreparing = true;
       _error = null;
       _progress = 0;
       _sessionInjected = false;
+      if (_useDesktopWebView) {
+        _desktopController = null;
+      }
     });
 
     try {
@@ -80,7 +98,7 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
 
       // 先打开同源页面，再注入 localStorage。
       // 这样 Cloudreve 官方前端可以直接复用 App 的 access_token。
-      await _controller.loadRequest(_originUri);
+      await _loadOrigin();
 
       if (!mounted) return;
       setState(() => _isPreparing = false);
@@ -105,7 +123,9 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
 
   Uri _buildCloudreveHomeUri() {
     final parent = _parentUri(widget.file.relativePath);
-    final openTarget = widget.file.id.isNotEmpty ? widget.file.id : widget.file.relativePath;
+    final openTarget = widget.file.id.isNotEmpty
+        ? widget.file.id
+        : widget.file.relativePath;
 
     return Uri(
       scheme: _originUri.scheme,
@@ -121,7 +141,9 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
   }
 
   String _parentUri(String uri) {
-    final normalized = uri.endsWith('/') ? uri.substring(0, uri.length - 1) : uri;
+    final normalized = uri.endsWith('/')
+        ? uri.substring(0, uri.length - 1)
+        : uri;
     final index = normalized.lastIndexOf('/');
     if (index <= 'cloudreve://my'.length) {
       return 'cloudreve://my';
@@ -138,7 +160,9 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
 
     Map<String, dynamic>? user;
     try {
-      final response = await ApiService.instance.get<Map<String, dynamic>>('/user/me');
+      final response = await ApiService.instance.get<Map<String, dynamic>>(
+        '/user/me',
+      );
       user = Map<String, dynamic>.from(response);
     } catch (_) {
       user = null;
@@ -181,15 +205,16 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
 
     try {
       if (sessionJson != null) {
-        final script = '''
+        final script =
+            '''
           try {
             localStorage.setItem('cloudreve_session', ${jsonEncode(sessionJson)});
           } catch (e) {}
           window.location.replace(${jsonEncode(target)});
         ''';
-        await _controller.runJavaScript(script);
+        await _runJavaScript(script);
       } else {
-        await _controller.loadRequest(_targetUri);
+        await _loadTarget();
       }
     } catch (e) {
       if (!mounted) return;
@@ -199,17 +224,52 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
 
   Future<void> _openTargetAgain() async {
     _sessionInjected = true;
-    await _controller.loadRequest(_targetUri);
+    await _loadTarget();
+  }
+
+  Future<void> _reloadWebView() async {
+    if (_useDesktopWebView) {
+      await _desktopController?.reload();
+    } else {
+      await _mobileController?.reload();
+    }
+  }
+
+  Future<void> _loadOrigin() async {
+    if (_useDesktopWebView) {
+      final controller = _desktopController;
+      if (controller == null) return;
+      await _desktopController?.loadUrl(
+        urlRequest: desktop.URLRequest(url: desktop.WebUri.uri(_originUri)),
+      );
+    } else {
+      await _mobileController!.loadRequest(_originUri);
+    }
+  }
+
+  Future<void> _loadTarget() async {
+    if (_useDesktopWebView) {
+      await _desktopController?.loadUrl(
+        urlRequest: desktop.URLRequest(url: desktop.WebUri.uri(_targetUri)),
+      );
+    } else {
+      await _mobileController!.loadRequest(_targetUri);
+    }
+  }
+
+  Future<void> _runJavaScript(String source) async {
+    if (_useDesktopWebView) {
+      await _desktopController?.evaluateJavascript(source: source);
+    } else {
+      await _mobileController!.runJavaScript(source);
+    }
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text(
-          widget.file.name,
-          overflow: TextOverflow.ellipsis,
-        ),
+        title: Text(widget.file.name, overflow: TextOverflow.ellipsis),
         actions: [
           IconButton(
             tooltip: '重新打开',
@@ -219,7 +279,7 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
           IconButton(
             tooltip: '刷新',
             icon: const Icon(Icons.refresh),
-            onPressed: () => _controller.reload(),
+            onPressed: _reloadWebView,
           ),
         ],
         bottom: PreferredSize(
@@ -260,6 +320,32 @@ class _CloudreveFileAppPageState extends State<CloudreveFileAppPage> {
       );
     }
 
-    return WebViewWidget(controller: _controller);
+    if (_useDesktopWebView) {
+      return desktop.InAppWebView(
+        initialSettings: desktop.InAppWebViewSettings(
+          javaScriptEnabled: true,
+          domStorageEnabled: true,
+          transparentBackground: true,
+          supportZoom: false,
+        ),
+        onWebViewCreated: (controller) async {
+          _desktopController = controller;
+          if (!_isPreparing) {
+            await _loadOrigin();
+          }
+        },
+        onProgressChanged: (_, progress) {
+          if (!mounted) return;
+          setState(() => _progress = progress);
+        },
+        onLoadStop: (_, url) => _injectSessionAndOpenIfNeeded(),
+        onReceivedError: (_, request, error) {
+          if (!mounted || request.isForMainFrame != true) return;
+          setState(() => _error = '${error.type}: ${error.description}');
+        },
+      );
+    }
+
+    return mobile.WebViewWidget(controller: _mobileController!);
   }
 }