Add curtain context for a curtain instance.

src/Components/Curtains/Curtains.tsx

@@ -50,6 +50,8 @@ export function useCurtains(): CurtainsContextState
 	return useContext(CurtainsContext);
 }
 
+
+
 /**
  * Page curtains system.
  */
@@ -117,20 +119,78 @@ function CurtainsPortal({curtains}: {
 })
 {
 	return ReactDOM.createPortal(Object.entries(curtains).map(([uuid, curtainContent]) => (
-		<CurtainInstance key={uuid}>
+		<CurtainInstance key={uuid} uuid={uuid}>
 			{curtainContent}
 		</CurtainInstance>
 	)), document.body);
 }
 
+
+
+/**
+ * Current curtain data and functions.
+ */
+export interface CurtainContextState
+{
+	/**
+	 * Curtain UUID.
+	 */
+	uuid: CurtainUuidType;
+
+	/**
+	 * Close the curtain.
+	 */
+	close: () => void;
+}
+
+/**
+ * Current curtain context.
+ */
+const CurtainContext = React.createContext<CurtainContextState>({
+	// Empty values.
+	uuid: "",
+	close: () => {},
+});
+
+/**
+ * Hook to access current curtain data and functions.
+ */
+export function useCurtain(): CurtainContextState
+{
+	return useContext(CurtainContext);
+}
+
 /**
  * Component of an opened curtain instance.
  */
-function CurtainInstance({children}: React.PropsWithChildren<{}>)
+function CurtainInstance({uuid, children}: React.PropsWithChildren<{
+	/**
+	 * Curtain UUID.
+	 */
+	uuid: string;
+}>)
 {
+	// Get close curtain function.
+	const {close} = useCurtains();
+
+	// Initialize close curtain function.
+	const closeCurtain = useRef<() => void>();
+	closeCurtain.current = useCallback(() => {
+		// Close the current curtain.
+		close(uuid);
+	}, [uuid, close]);
+
+	// Initialize context state from action functions.
+	const contextState = useMemo(() => ({
+		uuid: uuid,
+		close: () => closeCurtain.current(),
+	}), [uuid, closeCurtain]);
+
 	return (
+		<CurtainContext.Provider value={contextState}>
 			<div className={"curtain"}>
 				{children}
 			</div>
+		</CurtainContext.Provider>
 	);
 }