Develop (#265)

* Patch for file dialog on OSX

* Update CONTRIBUTORS.md

* 262 add wails shutdown method (#264)

* feat: support close in bridge mode

* feat: WailsShutdown callback

Now handles proper shutdown through:
  * runtime.Window.Close()
  * Killing the main window
  * Ctrl-C

* chore: version bump

lib/binding/manager.go

@@ -16,6 +16,7 @@ type Manager struct {
 	functions        map[string]*boundFunction
 	internalMethods  *internalMethods
 	initMethods      []*boundMethod
+	shutdownMethods  []*boundMethod
 	log              *logger.CustomLogger
 	renderer         interfaces.Renderer
 	runtime          interfaces.Runtime // The runtime object to pass to bound structs
@@ -127,6 +128,9 @@ func (b *Manager) bindMethod(object interface{}) error {
 		if newMethod.isWailsInit {
 			b.log.Debugf("Detected WailsInit function: %s", fullMethodName)
 			b.initMethods = append(b.initMethods, newMethod)
+		} else if newMethod.isWailsShutdown {
+			b.log.Debugf("Detected WailsShutdown function: %s", fullMethodName)
+			b.shutdownMethods = append(b.shutdownMethods, newMethod)
 		} else {
 			// Save boundMethod
 			b.log.Infof("Bound Method: %s()", fullMethodName)
@@ -292,3 +296,13 @@ func (b *Manager) callWailsInitMethods() error {
 	}
 	return nil
 }
+
+// Shutdown the binding manager
+func (b *Manager) Shutdown() {
+	b.log.Debug("Shutdown called")
+	for _, method := range b.shutdownMethods {
+		b.log.Debugf("Calling Shutdown for method: %s", method.fullName)
+		method.call("[]")
+	}
+	b.log.Debug("Shutdown complete")
+}

lib/binding/method.go

@@ -18,6 +18,7 @@ type boundMethod struct {
 	log                *logger.CustomLogger
 	hasErrorReturnType bool // Indicates if there is an error return type
 	isWailsInit        bool
+	isWailsShutdown    bool
 }
 
 // Creates a new bound method based on the given method + type
@@ -39,6 +40,11 @@ func newBoundMethod(name string, fullName string, method reflect.Value, objectTy
 		err = result.processWailsInit()
 	}
 
+	// Are we a WailsShutdown method?
+	if result.Name == "WailsShutdown" {
+		err = result.processWailsShutdown()
+	}
+
 	return result, err
 }
 
@@ -211,3 +217,20 @@ func (b *boundMethod) processWailsInit() error {
 
 	return nil
 }
+
+func (b *boundMethod) processWailsShutdown() error {
+	// We must have only 1 input, it must be *wails.Runtime
+	if len(b.inputs) != 0 {
+		return fmt.Errorf("Invalid WailsShutdown() definition. Expected 0 inputs, but got %d", len(b.inputs))
+	}
+
+	// We must have only 1 output, it must be error
+	if len(b.returnTypes) != 0 {
+		return fmt.Errorf("Invalid WailsShutdown() definition. Expected 0 return types, but got %d", len(b.returnTypes))
+	}
+
+	// We are indeed a wails Shutdown method
+	b.isWailsShutdown = true
+
+	return nil
+}