[macOS] add support for title & url aware for ui

common/webview_handler.cc

@@ -46,6 +46,17 @@ WebviewHandler* WebviewHandler::GetInstance() {
 void WebviewHandler::OnTitleChange(CefRefPtr<CefBrowser> browser,
                                   const CefString& title) {
     //todo: title change
+    if(onTitleChangedCb) {
+        onTitleChangedCb(title);
+    }
+}
+
+void WebviewHandler::OnAddressChange(CefRefPtr<CefBrowser> browser,
+                             CefRefPtr<CefFrame> frame,
+                     const CefString& url) {
+    if(onUrlChangedCb) {
+        onUrlChangedCb(url);
+    }
 }
 
 void WebviewHandler::OnAfterCreated(CefRefPtr<CefBrowser> browser) {

common/webview_handler.h

@@ -17,6 +17,8 @@ public CefLoadHandler,
 public CefRenderHandler{
 public:
     std::function<void(const void*, int32_t width, int32_t height)> onPaintCallback;
+    std::function<void(std::string url)> onUrlChangedCb;
+    std::function<void(std::string title)> onTitleChangedCb;
     
     explicit WebviewHandler();
     ~WebviewHandler();
@@ -37,6 +39,9 @@ public:
     // CefDisplayHandler methods:
     virtual void OnTitleChange(CefRefPtr<CefBrowser> browser,
                                const CefString& title) override;
+    virtual void OnAddressChange(CefRefPtr<CefBrowser> browser,
+                                 CefRefPtr<CefFrame> frame,
+                                 const CefString& url) override;
     
     // CefLifeSpanHandler methods:
     virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) override;

example/lib/main.dart

@@ -17,6 +17,7 @@ class MyApp extends StatefulWidget {
 class _MyAppState extends State<MyApp> {
   final _controller = WebViewController();
   final _textController = TextEditingController();
+  String title = "";
 
   @override
   void initState() {
@@ -30,6 +31,16 @@ class _MyAppState extends State<MyApp> {
     _textController.text = url;
     await _controller.initialize();
     await _controller.loadUrl(url);
+    _controller.setWebviewListener(WebviewEventsListener(
+      onTitleChanged: (t) {
+        setState(() {
+          title = t;
+        });
+      },
+      onUrlChanged: (url) {
+        _textController.text = url;
+      },
+    ));
     // If the widget was removed from the tree while the asynchronous platform
     // message was in flight, we want to discard the reply rather than calling
     // setState to update our non-existent appearance.
@@ -44,6 +55,10 @@ class _MyAppState extends State<MyApp> {
       home: Scaffold(
           body: Column(
         children: [
+          SizedBox(
+            height: 20,
+            child: Text(title),
+          ),
           Row(
             children: [
               SizedBox(

lib/src/webview.dart

@@ -5,12 +5,15 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 
+import 'webview_events_listener.dart';
+
 const MethodChannel _pluginChannel = MethodChannel("webview_cef");
 
 class WebViewController extends ValueNotifier<bool> {
   late Completer<void> _creatingCompleter;
   int _textureId = 0;
   bool _isDisposed = false;
+  WebviewEventsListener? _listener;
 
   Future<void> get ready => _creatingCompleter.future;
 
@@ -24,7 +27,7 @@ class WebViewController extends ValueNotifier<bool> {
     _creatingCompleter = Completer<void>();
     try {
       _textureId = await _pluginChannel.invokeMethod<int>('init') ?? 0;
-
+      _pluginChannel.setMethodCallHandler(_methodCallhandler);
       value = true;
       _creatingCompleter.complete();
     } on PlatformException catch (e) {
@@ -34,6 +37,23 @@ class WebViewController extends ValueNotifier<bool> {
     return _creatingCompleter.future;
   }
 
+  Future<void> _methodCallhandler(MethodCall call) async {
+    if (_listener == null) return;
+    switch (call.method) {
+      case "urlChanged":
+        _listener?.onUrlChanged?.call(call.arguments);
+        return;
+      case "titleChanged":
+        _listener?.onTitleChanged?.call(call.arguments);
+        return;
+      default:
+    }
+  }
+
+  setWebviewListener(WebviewEventsListener listener) {
+    _listener = listener;
+  }
+
   @override
   Future<void> dispose() async {
     await _creatingCompleter.future;

lib/src/webview_events_listener.dart

@@ -0,0 +1,9 @@
+typedef TitleChangeCb = void Function(String title);
+typedef UrlChangeCb = void Function(String url);
+
+class WebviewEventsListener {
+  TitleChangeCb? onTitleChanged;
+  UrlChangeCb? onUrlChanged;
+
+  WebviewEventsListener({this.onTitleChanged, this.onUrlChanged});
+}

lib/webview_cef.dart

@@ -1 +1,2 @@
-export 'src/webview.dart';
+export 'src/webview.dart';
+export 'src/webview_events_listener.dart';

macos/Classes/CefWrapper.h

@@ -39,6 +39,8 @@ extern int64_t textureId;
 
 + (void) openDevTools;
 
++ (void) setMethodChannel: (FlutterMethodChannel*)channel;
+
 @end
 
 #endif /* CefWrapper_h */

macos/Classes/CefWrapper.mm

@@ -28,6 +28,8 @@ dispatch_semaphore_t lock = dispatch_semaphore_create(1);
 
 int64_t textureId;
 
+FlutterMethodChannel* f_channel;
+
 @implementation CefWrapper
 
 + (void)init {
@@ -82,6 +84,16 @@ int64_t textureId;
         dispatch_semaphore_signal(lock);
         [tr textureFrameAvailable:textureId];
     };
+    
+    //url change cb
+    handler.get()->onUrlChangedCb = [](std::string url) {
+        [f_channel invokeMethod:@"urlChanged" arguments:[NSString stringWithCString:url.c_str() encoding:NSUTF8StringEncoding]];
+    };
+    //title change cb
+    handler.get()->onTitleChangedCb = [](std::string title) {
+        [f_channel invokeMethod:@"titleChanged" arguments:[NSString stringWithCString:title.c_str() encoding:NSUTF8StringEncoding]];
+    };
+    
     CefSettings settings;
     settings.windowless_rendering_enabled = true;
     settings.external_message_pump = true;
@@ -232,4 +244,8 @@ int64_t textureId;
     return buf_temp;
 }
 
++ (void)setMethodChannel: (FlutterMethodChannel*)channel {
+    f_channel = channel;
+}
+
 @end

macos/Classes/WebviewCefPlugin.m

@@ -11,6 +11,7 @@
     WebviewCefPlugin *instance = [[WebviewCefPlugin alloc] init];
     
     [registrar addMethodCallDelegate:instance channel:channel];
+    [CefWrapper setMethodChannel:channel];
     
     tr = registrar.textures;
 }