feat: 移除多余的媒体权限处理逻辑和相关代码；优化 WebView 控制器创建

lib/main.dart

@@ -3,11 +3,8 @@ import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:permission_handler/permission_handler.dart';
 import 'package:url_launcher/url_launcher.dart';
 import 'package:webview_flutter/webview_flutter.dart';
-import 'package:webview_flutter_android/webview_flutter_android.dart';
-import 'package:webview_flutter_wkwebview/webview_flutter_wkwebview.dart';
 
 import 'config/app_config.dart';
 
@@ -56,100 +53,6 @@ const _inspectH5SnapshotScript = r'''
   });
 })();
 ''';
-const _shellMediaPermissionBridgeScript = r'''
-(() => {
-  if (window.__openimShellMediaBridgeInstalled) {
-    return;
-  }
-
-  const channel = window.OpenIMFlutterShell;
-  const mediaDevices = navigator.mediaDevices;
-  if (!channel || typeof channel.postMessage !== 'function') {
-    return;
-  }
-  if (!mediaDevices || typeof mediaDevices.getUserMedia !== 'function') {
-    return;
-  }
-
-  const originalGetUserMedia = mediaDevices.getUserMedia.bind(mediaDevices);
-  const resultEventName = 'openim-shell-media-permission-result';
-
-  const createRequestId = () => {
-    if (window.crypto && typeof window.crypto.randomUUID === 'function') {
-      return window.crypto.randomUUID();
-    }
-    return `${Date.now()}-${Math.random().toString(36).slice(2)}`;
-  };
-
-  const createPermissionError = () => {
-    try {
-      return new DOMException('Permission denied', 'NotAllowedError');
-    } catch (_) {
-      const error = new Error('Permission denied');
-      error.name = 'NotAllowedError';
-      return error;
-    }
-  };
-
-  const requestNativePermissions = (constraints) =>
-    new Promise((resolve) => {
-      const requestId = createRequestId();
-      let timer;
-
-      const cleanup = () => {
-        if (timer) {
-          window.clearTimeout(timer);
-        }
-        window.removeEventListener(resultEventName, listener);
-      };
-
-      const listener = (event) => {
-        const detail = event.detail;
-        if (!detail || detail.requestId !== requestId) {
-          return;
-        }
-        cleanup();
-        resolve(detail);
-      };
-
-      timer = window.setTimeout(() => {
-        cleanup();
-        resolve(undefined);
-      }, 30000);
-
-      window.addEventListener(resultEventName, listener);
-      channel.postMessage(
-        JSON.stringify({
-          type: 'requestMediaPermissions',
-          requestId,
-          audio: Boolean(constraints && constraints.audio),
-          video: Boolean(constraints && constraints.video),
-        }),
-      );
-    });
-
-  const wrappedGetUserMedia = async (constraints) => {
-    const result = await requestNativePermissions(constraints || {});
-    if (result && result.granted) {
-      return originalGetUserMedia(constraints);
-    }
-    throw createPermissionError();
-  };
-
-  try {
-    Object.defineProperty(mediaDevices, 'getUserMedia', {
-      configurable: true,
-      writable: true,
-      value: wrappedGetUserMedia,
-    });
-  } catch (_) {
-    mediaDevices.getUserMedia = wrappedGetUserMedia;
-  }
-
-  window.__openimShellMediaBridgeInstalled = true;
-  window.dispatchEvent(new CustomEvent('openim-shell-media-bridge-ready'));
-})();
-''';
 const _stopWebMediaScript = r'''
 (() => {
   try {
@@ -279,30 +182,8 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
   }
 
   WebViewController _buildController() {
-    PlatformWebViewControllerCreationParams params =
-        const PlatformWebViewControllerCreationParams();
-
-    if (WebViewPlatform.instance is WebKitWebViewPlatform) {
-      params = WebKitWebViewControllerCreationParams(
-        allowsInlineMediaPlayback: true,
-        mediaTypesRequiringUserAction: const <PlaybackMediaTypes>{},
-      );
-    } else if (WebViewPlatform.instance is AndroidWebViewPlatform) {
-      params = AndroidWebViewControllerCreationParams
-          .fromPlatformWebViewControllerCreationParams(params);
-    }
-
-    final controller = WebViewController.fromPlatformCreationParams(
-      params,
-      onPermissionRequest: (request) {
-        unawaited(_handleWebViewPermissionRequest(request));
-      },
-    )
+    return WebViewController()
       ..setJavaScriptMode(JavaScriptMode.unrestricted)
-      ..addJavaScriptChannel(
-        'OpenIMFlutterShell',
-        onMessageReceived: _handleShellBridgeMessage,
-      )
       ..setBackgroundColor(_shellBackground)
       ..setNavigationDelegate(
         NavigationDelegate(
@@ -339,90 +220,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
           onNavigationRequest: _handleNavigationRequest,
         ),
       );
-
-    final platformController = controller.platform;
-    if (platformController is AndroidWebViewController) {
-      assert(() {
-        AndroidWebViewController.enableDebugging(true);
-        return true;
-      }());
-      unawaited(platformController.setMediaPlaybackRequiresUserGesture(false));
-      unawaited(platformController.setGeolocationEnabled(true));
-      unawaited(
-        platformController.setGeolocationPermissionsPromptCallbacks(
-          onShowPrompt: (_) async {
-            final allowed =
-                await _requestPermission(Permission.locationWhenInUse);
-            return GeolocationPermissionsResponse(
-              allow: allowed,
-              retain: allowed,
-            );
-          },
-        ),
-      );
-    }
-
-    return controller;
-  }
-
-  void _handleShellBridgeMessage(JavaScriptMessage message) {
-    Map<String, dynamic>? payload;
-    String? type;
-    try {
-      final decoded = jsonDecode(message.message);
-      if (decoded is Map) {
-        payload = Map<String, dynamic>.from(decoded);
-        type = payload['type'] as String?;
-      }
-    } catch (_) {
-      type = message.message;
-    }
-
-    if (type == 'openAppSettings') {
-      unawaited(openAppSettings());
-    }
-    if (type == 'requestMediaPermissions' && payload != null) {
-      unawaited(_handleMediaPermissionBridgeRequest(payload));
-    }
-  }
-
-  Future<void> _handleMediaPermissionBridgeRequest(
-    Map<String, dynamic> payload,
-  ) async {
-    final requestId = payload['requestId'] as String?;
-    if (requestId == null || requestId.isEmpty) {
-      return;
-    }
-
-    final permissions = <Permission>{};
-    if (payload['audio'] == true) {
-      permissions.add(Permission.microphone);
-    }
-    if (payload['video'] == true) {
-      permissions.add(Permission.camera);
-    }
-
-    final statusesByPermission = await _requestPermissions(permissions);
-    final statuses = statusesByPermission.values;
-    final granted = statuses.every(
-      _isPermissionAllowed,
-    );
-    final permanentlyDenied =
-        statuses.any((status) => status.isPermanentlyDenied);
-    final restricted = statuses.any((status) => status.isRestricted);
-
-    final detail = jsonEncode({
-      'requestId': requestId,
-      'granted': granted,
-      'permanentlyDenied': permanentlyDenied,
-      'restricted': restricted,
-    });
-    final script = '''
-(() => {
-  window.dispatchEvent(new CustomEvent('openim-shell-media-permission-result', { detail: $detail }));
-})();
-''';
-    await _runJavaScriptSafely(script);
   }
 
   void _showTransientShellCover() {
@@ -451,7 +248,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
 
   Future<void> _handlePageFinished() async {
     await _syncShellBranding();
-    unawaited(_injectShellMediaPermissionBridge());
     unawaited(_logLoadedH5Snapshot());
     if (mounted) {
       setState(() {
@@ -478,10 +274,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     return _runJavaScriptSafely(script);
   }
 
-  Future<void> _injectShellMediaPermissionBridge() {
-    return _runJavaScriptSafely(_shellMediaPermissionBridgeScript);
-  }
-
   Future<void> _stopWebMedia() {
     return _runJavaScriptSafely(_stopWebMediaScript);
   }
@@ -556,73 +348,6 @@ class _H5ShellPageState extends State<H5ShellPage> with WidgetsBindingObserver {
     return NavigationDecision.prevent;
   }
 
-  Future<void> _handleWebViewPermissionRequest(
-    WebViewPermissionRequest request,
-  ) async {
-    final permissions = <Permission>{};
-    if (request.types.contains(WebViewPermissionResourceType.camera)) {
-      permissions.add(Permission.camera);
-    }
-    if (request.types.contains(WebViewPermissionResourceType.microphone)) {
-      permissions.add(Permission.microphone);
-    }
-
-    debugPrint(
-      '[H5Shell] WebView media permission request: '
-      '${request.types.map((type) => type.name).join(', ')}',
-    );
-
-    final statusesByPermission = await _requestPermissions(permissions);
-    final allowed = statusesByPermission.values.every(_isPermissionAllowed);
-    debugPrint(
-      '[H5Shell] WebView media permission result: '
-      '${statusesByPermission.map((permission, status) => MapEntry(permission.toString(), status.toString()))}',
-    );
-
-    if (allowed) {
-      await request.grant();
-    } else {
-      await request.deny();
-    }
-  }
-
-  bool _isPermissionAllowed(PermissionStatus status) {
-    return status.isGranted || status.isLimited;
-  }
-
-  Future<Map<Permission, PermissionStatus>> _requestPermissions(
-    Set<Permission> permissions,
-  ) async {
-    if (permissions.isEmpty) {
-      return const {};
-    }
-
-    final pending = <Permission>[];
-    final statuses = <Permission, PermissionStatus>{};
-
-    for (final permission in permissions) {
-      final status = await permission.status;
-      if (_isPermissionAllowed(status) ||
-          status.isPermanentlyDenied ||
-          status.isRestricted) {
-        statuses[permission] = status;
-      } else {
-        pending.add(permission);
-      }
-    }
-
-    if (pending.isNotEmpty) {
-      statuses.addAll(await pending.request());
-    }
-
-    return statuses;
-  }
-
-  Future<bool> _requestPermission(Permission permission) async {
-    final statuses = await _requestPermissions({permission});
-    return statuses.values.every(_isPermissionAllowed);
-  }
-
   Future<void> _handleBackNavigation() async {
     await _stopWebMedia();
     if (await _controller.canGoBack()) {