added the ability to close a file

contextAPI.js

@@ -3,6 +3,7 @@
 const {contextBridge, ipcRenderer, webFrame} = require("electron");
 
 let fileOpenListener  = null;
+let closeFileListener = null;
 
 contextBridge.exposeInMainWorld("api", {
 	openFileDialog : ()       => ipcRenderer.send("WindowManager::openFileDialog"),
@@ -12,9 +13,14 @@ contextBridge.exposeInMainWorld("api", {
 		fileOpenListener = (_, presentation) => callback(presentation);
 		ipcRenderer.on("Ation::openFile", fileOpenListener);
 	},
+	onFileClose    : callback => {
+		if (closeFileListener)
+			ipcRenderer.off("Ation::closeFile", closeFileListener);
+		closeFileListener = () => callback();
+		ipcRenderer.on("Ation::closeFile", closeFileListener);
+	},
 	openFile       : filePath => ipcRenderer.send("WindowManager::openFile", filePath),
-
+	closeFile      : () => ipcRenderer.send("Ation::closeFile"),
-	removeOnFileOpenListener : callback => ipcRenderer.off("Ation::openFile", callback),
 
 	clearCache : () => webFrame.clearCache(),
 	appVersion : async () => await ipcRenderer.invoke("Ation::appVersion")

src/Ation.js

@@ -1,5 +1,5 @@
 "use strict";
-const {app, protocol, dialog, ipcMain} = require("electron");
+const {app, protocol, dialog, ipcMain, Menu} = require("electron");
 const path                                   = require("path");
 const fs                                     = require("fs/promises");
 const fsn                                    = require("fs");
@@ -30,6 +30,7 @@ class Ation {
 		});
 
 		ipcMain.handle("Ation::appVersion", () => AppInfo.version);
+		ipcMain.on("Ation::closeFile", () => this.closeFile());
 
 		app.whenReady().then(async () => {
 			if (this.fileToOpen)
@@ -79,12 +80,22 @@ class Ation {
 					else
 						this.openFile(this.currentFile, true);
 				});
+				Menu.getApplicationMenu().getMenuItemById("close-file").enabled = this.currentFile !== "";
 				this.windowManager.mainWindow.send("Ation::openFile", [basePath, data]);
 			} catch (error) {
 				console.log(error);
 				return;
 			}
 	}
+
+	closeFile() {
+		this.currentFile = "";
+		if (this.watcher)
+			this.watcher.close();
+		this.watcher = null;
+		this.windowManager.mainWindow.send("Ation::closeFile");
+		Menu.getApplicationMenu().getMenuItemById("close-file").enabled = this.currentFile !== "";
+	}
 }
 Ation.Instances = 0;
 

src/MainMenu.js

@@ -22,6 +22,13 @@ class MainMenu {
 						label       : "Open",
 						accelerator : "CommandOrControl+O",
 						click       : () => this.app.openFile()
+					},
+					{
+						id          : "close-file",
+						label       : "Close",
+						accelerator : "CommandOrControl+W",
+						click       : () => this.app.closeFile(),
+						enabled     : this.app.currentFile !== ""
 					}
 				]
 			},

src/ui/src/components/Ation.js

@@ -30,6 +30,11 @@ const Ation = () => {
 			setBasePath(newBasePath);
 			setDeck(slideDeck);
 		});
+		window.api.onFileClose(() => {
+			setBasePath("");
+			setSlide(0);
+			setDeck([]);
+		});
 		(async set => set(await window.api.appVersion()))(setVersion);
 	}, [basePath, slide]);
 
@@ -42,7 +47,7 @@ const Ation = () => {
 			{deck.length < 1 ?
 				<NoFile openFile={openFile} />
 			: (
-				<SlideContext.Provider value={{slide, setSlide, mode, setMode, basePath}}>
+				<SlideContext.Provider value={{slide, setSlide, mode, setMode, basePath, slideCount : deck.length}}>
 					<section className={`window${mode === Mode.PRESENT ? " fullscreen" : ""}`}>
 						<Toolbar openFile={openFile} setShowTips={setShowTips} version={version} />
 						<SlidesList deck={deck} />

src/ui/src/components/Toolbar.js

@@ -1,6 +1,6 @@
 import React, {useContext} from "react";
 
-import {Folder2Open, Cast, InfoCircle} from "react-bootstrap-icons";
+import {Folder2Open, Cast, InfoCircle, XSquare} from "react-bootstrap-icons";
 
 import SlideContext from "../shared/SlideContext";
 import Mode         from "../models/Mode";
@@ -8,7 +8,7 @@ import Mode         from "../models/Mode";
 import {ReactComponent as Logo} from "../assets/images/logo_ation.svg";
 
 const Toolbar = ({openFile, setShowTips, version}) => {
-	const {setMode, setSlide} = useContext(SlideContext);
+	const {setMode, setSlide, slideCount} = useContext(SlideContext);
 
 	const present = () => {
 		setMode(Mode.PRESENT);
@@ -21,6 +21,7 @@ const Toolbar = ({openFile, setShowTips, version}) => {
 			<button onClick={openFile} title="Open file [⌘+O]"><Folder2Open /></button>	
 			<button onClick={present} title="Start presentation [F5]"><Cast /></button>	
 			<Logo />
+			<button onClick={() => window.api.closeFile()} title="Close file [⌘+W]" disabled={slideCount < 1}><XSquare /></button>
 			<button onClick={() => setShowTips(true)} title="Show tips [TAB]"><InfoCircle /></button>	
 			<small>v{version}</small>
 		</nav>

src/ui/src/shared/SlideContext.js

@@ -4,6 +4,7 @@ import Mode from "../models/Mode";
 
 const SlideContext = createContext({
 	slide      : 0,
+	slideCount : 0,
 	mode       : Mode.NORMAL,
 	basePath   : "",
 	setMode    : () => {},