Player: add message on the vm termination

src/components/Player/InputBox.jsx

@@ -106,6 +106,11 @@ export default function InputBox ({
     }
   }
 
+  const noopHandler = (event) => {
+    event.target.valut = ''
+    event.preventDefault()
+  }
+
   const inputHandlers = {
     char: {
       maxlength: '1',
@@ -120,6 +125,11 @@ export default function InputBox ({
       onKeyDown: lineArrowHandler,
       onKeyPress: lineHandler,
     },
+    finished: {
+      placeholder: 'The program has finished',
+      onKeyDown: noopHandler,
+      onKeyPress: noopHandler,
+    },
   }
 
   const enterFullscreen = () =>
@@ -134,6 +144,6 @@ export default function InputBox ({
       autocomplete='off'
       onDblClick={enterFullscreen}
       onInput={({ target: { value } }) => setInputText(value)}
-      type='search' />
+      type='text' />
   )
 }

src/components/Player/Player.jsx

@@ -9,7 +9,7 @@ import GridBuffer from './GridBuffer'
 import InputBox from './InputBox'
 import Status from './Status'
 
-import { Handlers } from './playerHandlers'
+import { Handlers, unhandledRejectionHandler } from './playerHandlers'
 
 import './player.css'
 
@@ -47,20 +47,29 @@ export default function Player ({
   const [sendMessage, setSendMessage] = useState(null)
 
   useEffect(() => {
-    const vm = runMachine({
+    const handlers = Handlers({
+      setStatus,
+      setWindows,
+      setCurrentWindowId,
+      setInputType,
+      setInbox,
+    })
+
+    setVm(runMachine({
       engine,
       wasmBinary,
       storyfile,
-      handlers: Handlers({
-        setStatus,
-        setWindows,
-        setCurrentWindowId,
-        setInputType,
-        setInbox,
-      }),
-    })
+      handlers,
+    }))
 
-    setVm(vm)
+    const rejectionHandler =
+      unhandledRejectionHandler(handlers.onExit)
+
+    window.addEventListener('unhandledrejection', rejectionHandler)
+
+    return () => {
+      window.removeEventListener('unhandledrejection', rejectionHandler)
+    }
   }, [storyfile, engine, wasmBinary])
 
   useEffect(() => {

src/components/Player/playerHandlers.js

@@ -46,6 +46,15 @@ export const Handlers = ({
   },
   /* */
   onExit: () => {
-    setInputType(null)
+    setInputType('finished')
   },
 })
+
+export const unhandledRejectionHandler = (onExit) => (event) => {
+  if (event.reason.name === 'ExitStatus' || event.reason.message === 'Program terminated with exit(0)') {
+    onExit()
+  } else {
+    console.error('Unhandled rejection (promise: ', event.promise, ', reason: ', event.reason, ').');
+  }
+  event.preventDefault()
+}