macOS: Implement isMaximizable and setMaximizable

README.md

@@ -76,7 +76,7 @@ English | [简体中文](./README-ZH.md)
       - [isMinimizable  `macos`  `windows`](#isminimizable--macos--windows)
       - [setMinimizable  `macos`  `windows`](#setminimizable--macos--windows)
       - [isClosable  `windows`](#isclosable--windows)
-      - [isMaximizable  `windows`](#ismaximizable--windows)
+      - [isMaximizable `macos` `windows`](#ismaximizable--macos--windows)
       - [setMaximizable](#setmaximizable)
       - [setClosable  `macos`  `windows`](#setclosable--macos--windows)
       - [isAlwaysOnTop](#isalwaysontop)

example/integration_test/window_manager_test.dart

@@ -50,7 +50,7 @@ Future<void> main() async {
 
   testWidgets('isMaximizable', (tester) async {
     expect(await windowManager.isMaximizable(), isTrue);
-  }, skip: Platform.isMacOS);
+  });
 
   testWidgets('isMaximized', (tester) async {
     expect(await windowManager.isMaximized(), isFalse);

macos/Classes/WindowManager.swift

@@ -51,7 +51,8 @@ public class WindowManager: NSObject, NSWindowDelegate {
 
     private var _isPreventClose: Bool = false
     private var _isMaximized: Bool = false
-
+    private var _isMaximizable: Bool = true
+
     override public init() {
         super.init()
     }
@@ -88,6 +89,14 @@ public class WindowManager: NSObject, NSWindowDelegate {
     public func setPreventClose(_ args: [String: Any]) {
         _isPreventClose = args["isPreventClose"] as! Bool
     }
+
+    public func isMaximizable() -> Bool {
+        return _isMaximizable;
+    }
+
+    public func setIsMaximizable(_ args: [String: Any]) {
+        _isMaximizable = args["isMaximizable"] as! Bool
+    }
 
     public func focus() {
         NSApp.activate(ignoringOtherApps: false)
@@ -458,6 +467,15 @@ public class WindowManager: NSObject, NSWindowDelegate {
         }
         return true;
     }
+
+    public func windowShouldZoom(_ window: NSWindow, toFrame newFrame: NSRect) -> Bool {
+        _emitEvent("maximize")
+        if (isMaximizable()) {
+            return true
+        }
+        return false;
+    }
+
 
     public func windowDidResize(_ notification: Notification) {
         _emitEvent("resize")

macos/Classes/WindowManagerPlugin.swift

@@ -107,6 +107,13 @@ public class WindowManagerPlugin: NSObject, FlutterPlugin {
         case "isMinimized":
             result(windowManager.isMinimized())
             break
+        case "isMaximizable":
+            result(windowManager.isMaximizable())
+            break
+        case "setMaximizable":
+            windowManager.setIsMaximizable(args)
+            result(true)
+            break
         case "minimize":
             windowManager.minimize()
             result(true)