[windows] Use msWebView2BrowserHitTransparent for non working NC area clicks on unfocused window

Without this patch there's a really strange behaviour if there are
multiple windows.
Having two windows with a webview open with an input field.
Focusing the input field on one window, then focusing the input
field on the second one. Then clicking directly on the non client
area of the first one, e.g. to trigger a minimze, the minimize is
not executed until the mouse is getting moved. As long as the
mouse is not moved the event for the click is blocked and not
executed.

Using this new mode fixes that problem, but we need to handle
‘alt+f4’ on our own.

v3/pkg/application/application.go

@@ -767,8 +767,7 @@ func (a *App) runOrDeferToAppRun(r runnable) {
 }
 
 func (a *App) processKeyBinding(acceleratorString string, window *WebviewWindow) bool {
-
-	if a.keyBindings == nil {
+	if len(a.keyBindings) == 0 {
 		return false
 	}
 

v3/pkg/application/webview_window.go

@@ -1096,20 +1096,17 @@ func (w *WebviewWindow) SetAbsolutePosition(x int, y int) {
 }
 
 func (w *WebviewWindow) processKeyBinding(acceleratorString string) bool {
-
-	if w.keyBindings == nil {
-		return false
-	}
-
 	// Check key bindings
-	callback, ok := w.keyBindings[acceleratorString]
-	if !ok {
-		return globalApplication.processKeyBinding(acceleratorString, w)
-	}
-	// Execute callback
-	go callback(w)
+	if w.keyBindings != nil {
+		if callback := w.keyBindings[acceleratorString]; callback != nil {
+			// Execute callback
+			go callback(w)
 
-	return true
+			return true
+		}
+	}
+
+	return globalApplication.processKeyBinding(acceleratorString, w)
 }
 
 func (w *WebviewWindow) HandleKeyEvent(acceleratorString string) {

v3/pkg/application/webview_window_windows.go

@@ -1289,14 +1289,9 @@ func (w *windowsWebviewWindow) setupChromium() {
 	globalApplication.capabilities = capabilities.NewCapabilities(webview2version)
 
 	disableFeatues := []string{}
-
 	if !opts.EnableFraudulentWebsiteWarnings {
 		disableFeatues = append(disableFeatues, "msSmartScreenProtection")
 	}
-
-	chromium.DataPath = globalApplication.options.Windows.WebviewUserDataPath
-	chromium.BrowserPath = globalApplication.options.Windows.WebviewBrowserPath
-
 	if opts.WebviewGpuIsDisabled {
 		chromium.AdditionalBrowserArgs = append(chromium.AdditionalBrowserArgs, "--disable-gpu")
 	}
@@ -1306,6 +1301,15 @@ func (w *windowsWebviewWindow) setupChromium() {
 		chromium.AdditionalBrowserArgs = append(chromium.AdditionalBrowserArgs, arg)
 	}
 
+	enableFeatures := []string{"msWebView2BrowserHitTransparent"}
+	if len(enableFeatures) > 0 {
+		arg := fmt.Sprintf("--enable-features=%s", strings.Join(enableFeatures, ","))
+		chromium.AdditionalBrowserArgs = append(chromium.AdditionalBrowserArgs, arg)
+	}
+
+	chromium.DataPath = globalApplication.options.Windows.WebviewUserDataPath
+	chromium.BrowserPath = globalApplication.options.Windows.WebviewBrowserPath
+
 	if opts.Permissions != nil {
 		for permission, state := range opts.Permissions {
 			chromium.SetPermission(edge.CoreWebView2PermissionKind(permission),
@@ -1547,9 +1551,6 @@ func (w *windowsWebviewWindow) processKeyBinding(vkey uint) bool {
 
 	globalApplication.debug("Processing key binding", "vkey", vkey)
 
-	if len(w.parent.keyBindings) == 0 {
-		return false
-	}
 	// Get the keyboard state and convert to an accelerator
 	var keyState [256]byte
 	if !w32.GetKeyboardState(keyState[:]) {
@@ -1584,9 +1585,20 @@ func (w *windowsWebviewWindow) processKeyBinding(vkey uint) bool {
 		acc.Key = accKey
 	}
 
-	// Process the key binding
-	return w.parent.processKeyBinding(acc.String())
+	accKey := acc.String()
+	globalApplication.debug("Processing key binding", "vkey", vkey, "acc", accKey)
 
+	// Process the key binding
+	if w.parent.processKeyBinding(accKey) {
+		return true
+	}
+
+	if accKey == "alt+f4" {
+		w32.PostMessage(w.hwnd, w32.WM_CLOSE, 0, 0)
+		return true
+	}
+
+	return false
 }
 
 func (w *windowsWebviewWindow) processMessageWithAdditionalObjects(message string, sender *edge.ICoreWebView2, args *edge.ICoreWebView2WebMessageReceivedEventArgs) {