From 07451eadf2a04060b2719f8d2fcc748d37579134 Mon Sep 17 00:00:00 2001
From: Michael Ochmann <michael.ochmann@propeller.de>
Date: Sun, 2 Oct 2022 18:48:28 +0200
Subject: [PATCH] fixed unlimited creation of `openFile` listeners

---
 contextAPI.js                  | 13 +++++++++++--
 src/ui/src/components/Ation.js |  4 ++--
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/contextAPI.js b/contextAPI.js
index f371b6e..3d0ceeb 100644
--- a/contextAPI.js
+++ b/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)
 });
\ No newline at end of file
diff --git a/src/ui/src/components/Ation.js b/src/ui/src/components/Ation.js
index c9ee4fd..1979e61 100644
--- a/src/ui/src/components/Ation.js
+++ b/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();