Custom menu items

firefly/bindings.go

@@ -147,6 +147,17 @@ func addProgress(peerID, badgeID uint32, val int32) uint32
 //go:wasmimport stats add_score
 func addScore(peerID, boardID uint32, val int32) int32
 
+// -- MENU -- //
+
+//go:wasmimport menu add_menu_item
+func addMenuItem(index uint32, ptr unsafe.Pointer, size uint32)
+
+//go:wasmimport menu remove_menu_item
+func removeMenuItem(index uint32)
+
+//go:wasmimport menu open_menu
+func openMenu()
+
 // -- MISC -- //
 
 //go:wasmimport misc log_debug

firefly/callbacks.go

@@ -24,6 +24,9 @@ var (
 	//
 	// Accepts the command index and value and returns a response to show in CLI.
 	Cheat func(int, int) int
+
+	// Callback to be called when a custom menu item is selected.
+	HandleMenu func(MenuItem)
 )
 
 //go:export boot
@@ -62,10 +65,20 @@ func cheat(c, v int32) int32 {
 	return 0
 }
 
+//go:export handle_menu
+func handleMenu(i int32) {
+	if HandleMenu != nil {
+		HandleMenu(MenuItem(i))
+	}
+}
+
+// Suppress warning about unused private function
+// (the linter doesn't account for "go:export").
 var (
 	_ = boot
 	_ = update
 	_ = render
 	_ = beforeExit
 	_ = cheat
+	_ = handleMenu
 )

firefly/menu.go

@@ -0,0 +1,19 @@
+package firefly
+
+import "unsafe"
+
+type MenuItem uint8
+
+func OpenMenu() {
+	openMenu()
+}
+
+func AddMenuItem(i MenuItem, name string) {
+	ptr := unsafe.Pointer(unsafe.StringData(name))
+	size := uint32(len(name))
+	addMenuItem(uint32(i), ptr, size)
+}
+
+func RemoveMenuItem(i MenuItem) {
+	removeMenuItem(uint32(i))
+}