[webview_flutter_wkwebview] Change callbacks setters to anonymous fun…

…ctions (#5921)

packages/webview_flutter/webview_flutter_wkwebview/lib/src/foundation/foundation.dart

@@ -244,6 +244,7 @@ class NSObject with Copyable {
  /// This should only be used by subclasses created by this library or to
  /// create copies.
  NSObject({
+ this.observeValue,
  BinaryMessenger? binaryMessenger,
  InstanceManager? instanceManager,
  }) : _api = NSObjectHostApiImpl(
@@ -262,6 +263,13 @@ class NSObject with Copyable {
 
  final NSObjectHostApiImpl _api;
 
+ /// Informs the observing object when the value at the specified key path has changed.
+ final void Function(
+ String keyPath,
+ NSObject object,
+ Map<NSKeyValueChangeKey, Object?> change,
+ )? observeValue;
+
  /// Registers the observer object to receive KVO notifications.
  Future<void> addObserver(
  NSObject observer, {
@@ -287,21 +295,10 @@ class NSObject with Copyable {
  instance._api.instanceManager.removeWeakReference(instance);
  }
 
- /// Informs the observing object when the value at the specified key path has changed.
- Future<void> setObserveValue(
- void Function(
- String keyPath,
- NSObject object,
- Map<NSKeyValueChangeKey, Object?> change,
- )?
- observeValue,
- ) {
- throw UnimplementedError();
- }
-
  @override
  Copyable copy() {
  return NSObject(
+ observeValue: observeValue,
  binaryMessenger: _api.binaryMessenger,
  instanceManager: _api.instanceManager,
  );

packages/webview_flutter/webview_flutter_wkwebview/lib/src/ui_kit/ui_kit.dart

@@ -64,8 +64,11 @@ class UIScrollView extends UIView {
 /// Wraps [UIView](https://developer.apple.com/documentation/uikit/uiview?language=objc).
 class UIView extends NSObject {
  /// Constructs an [NSObject].
- UIView({BinaryMessenger? binaryMessenger, InstanceManager? instanceManager})
- : _viewApi = UIViewHostApiImpl(
+ UIView({
+ super.observeValue,
+ BinaryMessenger? binaryMessenger,
+ InstanceManager? instanceManager,
+ }) : _viewApi = UIViewHostApiImpl(
  binaryMessenger: binaryMessenger,
  instanceManager: instanceManager,
  );

packages/webview_flutter/webview_flutter_wkwebview/lib/src/web_kit/web_kit.dart

@@ -350,6 +350,8 @@ class WKHttpCookieStore extends NSObject {
 class WKScriptMessageHandler extends NSObject {
  /// Constructs a [WKScriptMessageHandler].
  WKScriptMessageHandler({
+ required this.didReceiveScriptMessage,
+ super.observeValue,
  BinaryMessenger? binaryMessenger,
  InstanceManager? instanceManager,
  }) : _scriptMessageHandlerApi = WKScriptMessageHandlerHostApiImpl(
@@ -366,15 +368,10 @@ class WKScriptMessageHandler extends NSObject {
  /// Use this method to respond to a message sent from the webpage’s
  /// JavaScript code. Use the [message] parameter to get the message contents and
  /// to determine the originating web view.
- Future<void> setDidReceiveScriptMessage(
- void Function(
- WKUserContentController userContentController,
- WKScriptMessage message,
- )?
- didReceiveScriptMessage,
- ) {
- throw UnimplementedError();
- }
+ final void Function(
+ WKUserContentController userContentController,
+ WKScriptMessage message,
+ ) didReceiveScriptMessage;
 }
 
 /// Manages interactions between JavaScript code and your web view.
@@ -572,6 +569,8 @@ class WKWebViewConfiguration extends NSObject {
 class WKUIDelegate extends NSObject {
  /// Constructs a [WKUIDelegate].
  WKUIDelegate({
+ this.onCreateWebView,
+ super.observeValue,
  BinaryMessenger? binaryMessenger,
  InstanceManager? instanceManager,
  }) : _uiDelegateApi = WKUIDelegateHostApiImpl(
@@ -584,15 +583,10 @@ class WKUIDelegate extends NSObject {
  final WKUIDelegateHostApiImpl _uiDelegateApi;
 
  /// Indicates a new [WKWebView] was requested to be created with [configuration].
- Future<void> setOnCreateWebView(
- void Function(
- WKWebViewConfiguration configuration,
- WKNavigationAction navigationAction,
- )?
- onCreateWebView,
- ) {
- throw UnimplementedError();
- }
+ final void Function(
+ WKWebViewConfiguration configuration,
+ WKNavigationAction navigationAction,
+ )? onCreateWebView;
 }
 
 /// Methods for handling navigation changes and tracking navigation requests.
@@ -606,6 +600,12 @@ class WKNavigationDelegate extends NSObject {
  /// Constructs a [WKNavigationDelegate].
  WKNavigationDelegate({
  this.didFinishNavigation,
+ this.didStartProvisionalNavigation,
+ this.decidePolicyForNavigationAction,
+ this.didFailNavigation,
+ this.didFailProvisionalNavigation,
+ this.webViewWebContentProcessDidTerminate,
+ super.observeValue,
  super.binaryMessenger,
  super.instanceManager,
  }) : _navigationDelegateApi = WKNavigationDelegateHostApiImpl(
@@ -623,6 +623,12 @@ class WKNavigationDelegate extends NSObject {
  /// library or to create a copy for an InstanceManager.
  WKNavigationDelegate.detached({
  this.didFinishNavigation,
+ this.didStartProvisionalNavigation,
+ this.decidePolicyForNavigationAction,
+ this.didFailNavigation,
+ this.didFailProvisionalNavigation,
+ this.webViewWebContentProcessDidTerminate,
+ super.observeValue,
  super.binaryMessenger,
  super.instanceManager,
  }) : _navigationDelegateApi = WKNavigationDelegateHostApiImpl(
@@ -636,49 +642,36 @@ class WKNavigationDelegate extends NSObject {
  final void Function(WKWebView webView, String? url)? didFinishNavigation;
 
  /// Called when navigation from the main frame has started.
- Future<void> setDidStartProvisionalNavigation(
- void Function(WKWebView webView, String? url)?
- didStartProvisionalNavigation,
- ) {
- throw UnimplementedError();
- }
+ final void Function(WKWebView webView, String? url)?
+ didStartProvisionalNavigation;
 
  /// Called when permission is needed to navigate to new content.
- Future<void> setDecidePolicyForNavigationAction(
- Future<WKNavigationActionPolicy> Function(
+ final Future<WKNavigationActionPolicy> Function(
  WKWebView webView,
  WKNavigationAction navigationAction,
- )?
- decidePolicyForNavigationAction) {
- throw UnimplementedError();
- }
+ )? decidePolicyForNavigationAction;
 
  /// Called when an error occurred during navigation.
- Future<void> setDidFailNavigation(
- void Function(WKWebView webView, NSError error)? didFailNavigation,
- ) {
- throw UnimplementedError();
- }
+ final void Function(WKWebView webView, NSError error)? didFailNavigation;
 
  /// Called when an error occurred during the early navigation process.
- Future<void> setDidFailProvisionalNavigation(
- void Function(WKWebView webView, NSError error)?
- didFailProvisionalNavigation,
- ) {
- throw UnimplementedError();
- }
+ final void Function(WKWebView webView, NSError error)?
+ didFailProvisionalNavigation;
 
  /// Called when the web view’s content process was terminated.
- Future<void> setWebViewWebContentProcessDidTerminate(
- void Function(WKWebView webView)? webViewWebContentProcessDidTerminate,
- ) {
- throw UnimplementedError();
- }
+ final void Function(WKWebView webView)? webViewWebContentProcessDidTerminate;
 
  @override
  Copyable copy() {
  return WKNavigationDelegate.detached(
  didFinishNavigation: didFinishNavigation,
+ didStartProvisionalNavigation: didStartProvisionalNavigation,
+ decidePolicyForNavigationAction: decidePolicyForNavigationAction,
+ didFailNavigation: didFailNavigation,
+ didFailProvisionalNavigation: didFailProvisionalNavigation,
+ webViewWebContentProcessDidTerminate:
+ webViewWebContentProcessDidTerminate,
+ observeValue: observeValue,
  binaryMessenger: _navigationDelegateApi.binaryMessenger,
  instanceManager: _navigationDelegateApi.instanceManager,
  );
@@ -715,6 +708,7 @@ class WKWebView extends UIView {
  /// configuration object.
  WKWebView(
  WKWebViewConfiguration configuration, {
+ super.observeValue,
  super.binaryMessenger,
  super.instanceManager,
  }) : _binaryMessenger = binaryMessenger,