fixed unlimited creation of `openFile` listeners

contextAPI.js

@@ -2,8 +2,17 @@
 
 const {contextBridge, ipcRenderer} = require("electron");
 
+let fileOpenListener = null;
+
 contextBridge.exposeInMainWorld("api", {
 	openFileDialog : ()       => ipcRenderer.send("WindowManager::openFileDialog"),
-	onFileOpen     : callback => ipcRenderer.on("Ation::openFile", (_, presentation) => callback(presentation)),
-	openFile       : filePath => ipcRenderer.send("WindowManager::openFile", filePath)
+	onFileOpen     : callback => {
+		if (fileOpenListener)
+			ipcRenderer.off("Ation::openFile", fileOpenListener);
+		fileOpenListener = (_, presentation) => callback(presentation);
+		ipcRenderer.on("Ation::openFile", fileOpenListener);
+	},
+	openFile       : filePath => ipcRenderer.send("WindowManager::openFile", filePath),
+
+	removeOnFileOpenListener : callback => ipcRenderer.off("Ation::openFile", callback)
 });

src/ui/src/components/Ation.js

@@ -23,12 +23,12 @@ const Ation = () => {
 			const [newBasePath, slideDeck] = presentation;
 			if (!slideDeck)
 				return;
-			if (newBasePath !== basePath)
+			if (slide >= slideDeck.length)
 				setSlide(0);
 			setBasePath(newBasePath);
 			setDeck(slideDeck);
 		});
-	}, [basePath]);
+	}, [basePath, slide]);
 
 	const openFile = () => {
 		window.api.openFileDialog();