Restore ToggleMaximise method in Window interface

v3/pkg/application/messageprocessor.go

@@ -12,16 +12,16 @@ import (
 // as parameter through every function call.
 
 const (
-	callRequest        int = 0
-	clipboardRequest       = 1
-	applicationRequest     = 2
-	eventsRequest          = 3
-	contextMenuRequest     = 4
-	dialogRequest          = 5
-	windowRequest          = 6
-	screensRequest         = 7
-	systemRequest          = 8
-	browserRequest         = 9
+	callRequest        = 0
+	clipboardRequest   = 1
+	applicationRequest = 2
+	eventsRequest      = 3
+	contextMenuRequest = 4
+	dialogRequest      = 5
+	windowRequest      = 6
+	screensRequest     = 7
+	systemRequest      = 8
+	browserRequest     = 9
 )
 
 type MessageProcessor struct {

v3/pkg/application/messageprocessor_window.go

@@ -123,6 +123,9 @@ func (m *MessageProcessor) processWindowMethod(method int, rw http.ResponseWrite
 	case WindowUnMaximise:
 		window.UnMaximise()
 		m.ok(rw)
+	case WindowToggleMaximise:
+		window.ToggleMaximise()
+		m.ok(rw)
 	case WindowRestore:
 		window.Restore()
 		m.ok(rw)

v3/pkg/application/webview_window.go

@@ -803,6 +803,20 @@ func (w *WebviewWindow) ToggleFullscreen() {
 	})
 }
 
+// ToggleMaximise toggles the window between maximised and normal
+func (w *WebviewWindow) ToggleMaximise() {
+	if w.impl == nil && !w.isDestroyed() {
+		return
+	}
+	InvokeSync(func() {
+		if w.IsMaximised() {
+			w.UnMaximise()
+		} else {
+			w.Maximise()
+		}
+	})
+}
+
 func (w *WebviewWindow) ToggleDevTools() {
 	if w.impl == nil && !w.isDestroyed() {
 		return

v3/pkg/application/window.go

@@ -67,6 +67,7 @@ type Window interface {
 	Size() (width int, height int)
 	ToggleDevTools()
 	ToggleFullscreen()
+	ToggleMaximise()
 	UnFullscreen()
 	UnMaximise()
 	UnMinimise()

v3/plugins/experimental/server/window.go

@@ -217,6 +217,8 @@ func (w Window) ToggleDevTools() {
 
 func (w Window) ToggleFullscreen() {}
 
+func (w Window) ToggleMaximise() {}
+
 func (w Window) UnFullscreen() {}
 
 func (w Window) UnMaximise() {}