Fixes #229

app.js

@@ -82,3 +82,53 @@ ipc.on('autoUpdater:update-downloaded', function(e, releaseNotes, releaseName, r
 		]
 	});
 });
+
+// Set Badge in taskbar for Windows
+ipc.on('setBadge', (event, messageCount) => {
+	messageCount = messageCount.toString();
+	var canvas = document.createElement("canvas");
+	canvas.height = 140;
+	canvas.width = 140;
+	var ctx = canvas.getContext("2d");
+	ctx.fillStyle = "red";
+	ctx.beginPath();
+	ctx.ellipse(70, 70, 70, 70, 0, 0, 2 * Math.PI);
+	ctx.fill();
+	ctx.textAlign = "center";
+	ctx.fillStyle = "white";
+
+	var ranges = [
+		{ divider: 1e18 , suffix: 'P' },
+		{ divider: 1e15 , suffix: 'E' },
+		{ divider: 1e12 , suffix: 'T' },
+		{ divider: 1e9 , suffix: 'G' },
+		{ divider: 1e6 , suffix: 'M' },
+		{ divider: 1e3 , suffix: 'k' }
+	];
+
+	function formatNumber(n) {
+		n = parseInt(n);
+		for (var i = 0; i < ranges.length; i++) {
+			if (n >= ranges[i].divider) {
+				return Math.round(n / ranges[i].divider).toString() + ranges[i].suffix;
+			}
+		}
+		return n.toString();
+	}
+
+	if (messageCount.length === 3) {
+		ctx.font = "75px sans-serif";
+		ctx.fillText("" + messageCount, 70, 98);
+	} else if (messageCount.length === 2) {
+		ctx.font = "100px sans-serif";
+		ctx.fillText("" + messageCount, 70, 105);
+	} else if (messageCount.length === 1) {
+		ctx.font = "125px sans-serif";
+		ctx.fillText("" + messageCount, 70, 112);
+	} else {
+		ctx.font = "75px sans-serif";
+		ctx.fillText("" + formatNumber(messageCount), 70, 98);
+	}
+
+	ipc.send('setBadge', messageCount, canvas.toDataURL());
+});

electron/main.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const {app, protocol, BrowserWindow, dialog, shell, Menu, ipcMain} = require('electron');
+const {app, protocol, BrowserWindow, dialog, shell, Menu, ipcMain, nativeImage} = require('electron');
 // Menu
 const appMenu = require('./menu');
 // Tray
@@ -183,13 +183,25 @@ function createWindow () {
 function updateBadge(title) {
 	var messageCount = title.match(/\d+/g) ? parseInt(title.match(/\d+/g).join("")) : 0;
 
-	if (process.platform === 'win32') {
+	if (process.platform === 'win32') { // Windows
 		tray.setBadge(messageCount);
-	}
 
-	app.setBadgeCount(messageCount);
+		if (messageCount === 0) {
+			mainWindow.setOverlayIcon(null, "");
+			return;
+		}
+
+		mainWindow.webContents.send('setBadge', messageCount);
+	} else { // Linux and macOS
+		app.setBadgeCount(messageCount);
+	}
 }
 
+ipcMain.on('setBadge', function(event, messageCount, value) {
+	var img = nativeImage.createFromDataURL(value);
+	mainWindow.setOverlayIcon(img, messageCount.toString());
+});
+
 const shouldQuit = app.makeSingleInstance((commandLine, workingDirectory) => {
 	// Someone tried to run a second instance, we should focus our window.
 	if (mainWindow) {