[webview_flutter] Opt-in feature that javaScript can automatically open window for iOS platform

packages/webview_flutter/webview_flutter/lib/src/legacy/webview.dart

@@ -98,6 +98,7 @@ class WebView extends StatefulWidget {
         AutoMediaPlaybackPolicy.require_user_action_for_all_media_types,
     this.allowsInlineMediaPlayback = false,
     this.backgroundColor,
+    this.javaScriptCanOpenWindowsAutomatically = false,
   });
 
   static WebViewPlatform? _platform;
@@ -295,6 +296,12 @@ class WebView extends StatefulWidget {
   /// default [backgroundColor] is `null`.
   final Color? backgroundColor;
 
+  /// Whether JavaScript can open windows automatically.
+  ///
+  /// This affects pop-up windows and window.open() in JavaScript.
+  /// The default value is false.
+  final bool javaScriptCanOpenWindowsAutomatically;
+
   @override
   State<StatefulWidget> createState() => _WebViewState();
 }
@@ -381,6 +388,8 @@ WebSettings _webSettingsFromWidget(WebView widget) {
     allowsInlineMediaPlayback: widget.allowsInlineMediaPlayback,
     userAgent: WebSetting<String?>.of(widget.userAgent),
     zoomEnabled: widget.zoomEnabled,
+    javaScriptCanOpenWindowsAutomatically:
+        widget.javaScriptCanOpenWindowsAutomatically,
   );
 }
 
@@ -402,6 +411,8 @@ WebSettings _clearUnchangedWebSettings(
   bool? debuggingEnabled;
   WebSetting<String?> userAgent = const WebSetting<String?>.absent();
   bool? zoomEnabled;
+  bool? javaScriptCanOpenWindowsAutomatically;
+
   if (currentValue.javascriptMode != newValue.javascriptMode) {
     javascriptMode = newValue.javascriptMode;
   }
@@ -420,6 +431,11 @@ WebSettings _clearUnchangedWebSettings(
   if (currentValue.zoomEnabled != newValue.zoomEnabled) {
     zoomEnabled = newValue.zoomEnabled;
   }
+  if (currentValue.javaScriptCanOpenWindowsAutomatically !=
+      newValue.javaScriptCanOpenWindowsAutomatically) {
+    javaScriptCanOpenWindowsAutomatically =
+        newValue.javaScriptCanOpenWindowsAutomatically;
+  }
 
   return WebSettings(
     javascriptMode: javascriptMode,
@@ -428,6 +444,8 @@ WebSettings _clearUnchangedWebSettings(
     debuggingEnabled: debuggingEnabled,
     userAgent: userAgent,
     zoomEnabled: zoomEnabled,
+    javaScriptCanOpenWindowsAutomatically:
+        javaScriptCanOpenWindowsAutomatically,
   );
 }
 
@@ -779,6 +797,19 @@ class WebViewController {
   Future<int> getScrollY() {
     return _webViewPlatformController.getScrollY();
   }
+
+  /// Sets whether JavaScript can open windows automatically.
+  ///
+  /// The default value is false.
+  Future<void> setJavaScriptCanOpenWindowsAutomatically(bool enabled) async {
+    if (_settings.javaScriptCanOpenWindowsAutomatically == enabled) {
+      return;
+    }
+    final WebSettings newSettings = _settings.copyWith(
+      javaScriptCanOpenWindowsAutomatically: enabled,
+    );
+    await _updateSettings(newSettings);
+  }
 }
 
 /// Manages cookies pertaining to all [WebView]s.

packages/webview_flutter/webview_flutter/lib/src/webview_controller.dart

@@ -405,6 +405,13 @@ class WebViewController {
   ) {
     return platform.setOnScrollPositionChange(onScrollPositionChange);
   }
+
+  /// Sets whether JavaScript can open windows automatically.
+  ///
+  /// The default value is false.
+  Future<void> setJavaScriptCanOpenWindowsAutomatically(bool enabled) {
+    return platform.setJavaScriptCanOpenWindowsAutomatically(enabled);
+  }
 }
 
 /// Permissions request when web content requests access to protected resources.

packages/webview_flutter/webview_flutter_android/lib/src/android_webview_controller.dart

@@ -731,6 +731,11 @@ class AndroidWebViewController extends PlatformWebViewController {
     _onJavaScriptPrompt = onJavaScriptTextInputDialog;
     return _webChromeClient.setSynchronousReturnValueForOnJsPrompt(true);
   }
+
+  @override
+  Future<void> setJavaScriptCanOpenWindowsAutomatically(bool enabled) async {
+    await _webView.settings.setJavaScriptCanOpenWindowsAutomatically(enabled);
+  }
 }
 
 /// Android implementation of [PlatformWebViewPermissionRequest].

packages/webview_flutter/webview_flutter_platform_interface/lib/src/legacy/types/web_settings.dart

@@ -85,6 +85,7 @@ class WebSettings {
     this.allowsInlineMediaPlayback,
     this.zoomEnabled,
     required this.userAgent,
+    this.javaScriptCanOpenWindowsAutomatically,
   });
 
   /// The JavaScript execution mode to be used by the webview.
@@ -125,8 +126,13 @@ class WebSettings {
   /// See also: [WebView.gestureNavigationEnabled]
   final bool? gestureNavigationEnabled;
 
+  /// Whether JavaScript can open windows automatically.
+  ///
+  /// This setting affects pop-up windows and window.open() in JavaScript.
+  final bool? javaScriptCanOpenWindowsAutomatically;
+
   @override
   String toString() {
-    return 'WebSettings(javascriptMode: $javascriptMode, hasNavigationDelegate: $hasNavigationDelegate, hasProgressTracking: $hasProgressTracking, debuggingEnabled: $debuggingEnabled, gestureNavigationEnabled: $gestureNavigationEnabled, userAgent: $userAgent, allowsInlineMediaPlayback: $allowsInlineMediaPlayback)';
+    return 'WebSettings(javascriptMode: $javascriptMode, hasNavigationDelegate: $hasNavigationDelegate, hasProgressTracking: $hasProgressTracking, debuggingEnabled: $debuggingEnabled, gestureNavigationEnabled: $gestureNavigationEnabled, userAgent: $userAgent, allowsInlineMediaPlayback: $allowsInlineMediaPlayback, javaScriptCanOpenWindowsAutomatically: $javaScriptCanOpenWindowsAutomatically)';
   }
 }

packages/webview_flutter/webview_flutter_platform_interface/lib/src/platform_webview_controller.dart

@@ -324,6 +324,15 @@ abstract class PlatformWebViewController extends PlatformInterface {
       'setOnJavaScriptTextInputDialog is not implemented on the current platform',
     );
   }
+
+  /// Sets whether JavaScript can open windows automatically.
+  ///
+  /// The default value is false.
+  Future<void> setJavaScriptCanOpenWindowsAutomatically(bool enabled) {
+    throw UnimplementedError(
+      'setJavaScriptCanOpenWindowsAutomatically is not implemented.',
+    );
+  }
 }
 
 /// Describes the parameters necessary for registering a JavaScript channel.

packages/webview_flutter/webview_flutter_wkwebview/darwin/Tests/FWFPreferencesHostApiTests.m

@@ -45,4 +45,18 @@ - (void)testSetJavaScriptEnabled {
   OCMVerify([mockPreferences setJavaScriptEnabled:YES]);
   XCTAssertNil(error);
 }
+
+- (void)testSetJavaScriptCanOpenWindowsAutomatically {
+  FWFPreferencesHostApiImpl *hostAPI = [[FWFPreferencesHostApiImpl alloc]
+      initWithInstanceManager:self.instanceManager];
+  [self.instanceManager addDartCreatedInstance:self.mockPreferences
+                                withIdentifier:0];
+
+  FlutterError *error;
+  [hostAPI setJavaScriptCanOpenWindowsAutomaticallyForPreferencesWithIdentifier:0
+                                                                     isEnabled:YES
+                                                                         error:&error];
+  OCMVerify([self.mockPreferences setJavaScriptCanOpenWindowsAutomatically:YES]);
+  XCTAssertNil(error);
+}
 @end