[macos] Implement getInitialUrl metnod

Author: lijy91

example/lib/pages/home.dart

@@ -14,12 +14,15 @@ class HomePage extends StatefulWidget {
 class _HomePageState extends State<HomePage> with ProtocolListener {
   bool _isAlwaysOnTop = false;
 
+  String? _initialUrl = '';
   final List<String> _receivedUrlList = [];
 
   @override
   void initState() {
     protocolHandler.addListener(this);
     super.initState();
+
+    _init();
   }
 
   @override
@@ -28,6 +31,11 @@ class _HomePageState extends State<HomePage> with ProtocolListener {
     super.dispose();
   }
 
+  void _init() async {
+    _initialUrl = await protocolHandler.getInitialUrl();
+    setState(() {});
+  }
+
   Widget _buildBody(BuildContext context) {
     return PreferenceList(
       children: <Widget>[
@@ -44,6 +52,20 @@ class _HomePageState extends State<HomePage> with ProtocolListener {
             ),
           ],
         ),
+        PreferenceListSection(
+          title: const Text('initialUrl'),
+          children: [
+            PreferenceListItem(
+              padding: const EdgeInsets.all(12),
+              title: Text('${_initialUrl}'),
+              accessoryView: Container(),
+              onTap: () async {
+                _initialUrl = await protocolHandler.getInitialUrl();
+                setState(() {});
+              },
+            ),
+          ],
+        ),
         PreferenceListSection(
           title: const Text('Received urls'),
           children: [

example/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -6,7 +6,9 @@ import FlutterMacOS
 import Foundation
 
 import protocol_handler
+import window_manager
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   ProtocolHandlerPlugin.register(with: registry.registrar(forPlugin: "ProtocolHandlerPlugin"))
+  WindowManagerPlugin.register(with: registry.registrar(forPlugin: "WindowManagerPlugin"))
 }

example/macos/Podfile.lock

@@ -2,20 +2,26 @@ PODS:
   - FlutterMacOS (1.0.0)
   - protocol_handler (0.0.1):
     - FlutterMacOS
+  - window_manager (0.2.0):
+    - FlutterMacOS
 
 DEPENDENCIES:
   - FlutterMacOS (from `Flutter/ephemeral`)
   - protocol_handler (from `Flutter/ephemeral/.symlinks/plugins/protocol_handler/macos`)
+  - window_manager (from `Flutter/ephemeral/.symlinks/plugins/window_manager/macos`)
 
 EXTERNAL SOURCES:
   FlutterMacOS:
     :path: Flutter/ephemeral
   protocol_handler:
     :path: Flutter/ephemeral/.symlinks/plugins/protocol_handler/macos
+  window_manager:
+    :path: Flutter/ephemeral/.symlinks/plugins/window_manager/macos
 
 SPEC CHECKSUMS:
   FlutterMacOS: 57701585bf7de1b3fc2bb61f6378d73bbdea8424
   protocol_handler: 587e1caf6c0b92ce351ab14081968dae49cb8cc6
+  window_manager: 3a1844359a6295ab1e47659b1a777e36773cd6e8
 
 PODFILE CHECKSUM: 6eac6b3292e5142cfc23bdeb71848a40ec51c14c
 

lib/src/protocol_handler.dart

@@ -51,9 +51,16 @@ class ProtocolHandler {
     _listeners.remove(listener);
   }
 
+  /// Register a custom protocol
   Future<void> register(String scheme) {
     return protocolRegistrar.register(scheme);
   }
+
+  /// If the app launch was triggered by an protocol, it will give the link url, otherwise it will give null.
+  Future<String?> getInitialUrl() async {
+    String initialUrl = await _channel.invokeMethod('getInitialUrl');
+    return initialUrl.isEmpty ? null : initialUrl;
+  }
 }
 
 final protocolHandler = ProtocolHandler.instance;

macos/Classes/ProtocolHandlerPlugin.swift

@@ -4,6 +4,8 @@ import FlutterMacOS
 public class ProtocolHandlerPlugin: NSObject, FlutterPlugin  {
     private var channel: FlutterMethodChannel!
 
+    private var _initialUrl: String?
+    
     override init(){
         super.init();
         NSAppleEventManager.shared().setEventHandler(self, andSelector: #selector(handleURLEvent(_:with:)), forEventClass: AEEventClass(kInternetEventClass), andEventID: AEEventID(kAEGetURL))
@@ -19,22 +21,21 @@ public class ProtocolHandlerPlugin: NSObject, FlutterPlugin  {
     @objc
     private func handleURLEvent(_ event: NSAppleEventDescriptor, with replyEvent: NSAppleEventDescriptor) {
         guard let urlString = event.paramDescriptor(forKeyword: AEKeyword(keyDirectObject))?.stringValue else { return }
+        if (_initialUrl == nil) {
+            _initialUrl = urlString
+        }
 
         let args: NSDictionary = [
             "url": urlString,
         ]
         channel.invokeMethod("onProtocolUrlReceived", arguments: args, result: nil)
     }
 
-    public func application(_ application: NSApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([NSUserActivityRestoring]) -> Void) -> Bool {
-        if (userActivity.activityType == NSUserActivityTypeBrowsingWeb) {
-            // TODO
-        }
-        return false
-    }
-    
     public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
         switch call.method {
+        case "getInitialUrl":
+            result(self._initialUrl ?? "");
+            break;
         default:
             result(FlutterMethodNotImplemented)
         }