glowing-bear/src/electron-main.js

// Modules to control application life and create native browser window
const {app, BrowserWindow, shell, ipcMain} = require('electron');
const path = require('path');
const fs = require('fs');

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow;

// We use this to store some tiny amount of preferences specific to electron
// things like window bounds and location
const initPath  = "init.json";

function createWindow () {
    let data;
    // read saved state from file (e.g. window bounds)
    try {
        data = JSON.parse(fs.readFileSync(initPath, 'utf8'));
    }
    catch(e) {
        console.log('Unable to read init.json: ', e);
    }
    // Create the browser window.
    const bounds = (data && data.bounds) ? data.bounds : {width: 1280, height:800 };
    mainWindow = new BrowserWindow({
        width: bounds.width,
        height: bounds.height,
        webPreferences: {
            preload: path.join(__dirname, 'electron-globals.js')
        }
    });

    // Remember window position
    if (data && data.bounds.x && data.bounds.y) {
        mainWindow.x = data.bounds.x;
        mainWindow.y = data.bounds.y;
    }

    mainWindow.setMenu(null);
    mainWindow.setMenuBarVisibility(false);
    mainWindow.setAutoHideMenuBar(true);

    // and load the index.html of the app.
    mainWindow.loadFile('index.html');

    // Open the DevTools.
    // mainWindow.webContents.openDevTools()

    var handleLink = (e, url) => {
        if(url != mainWindow.webContents.getURL()) {
            e.preventDefault();
            shell.openExternal(url);
        }
    };

    mainWindow.webContents.on('will-navigate', handleLink);
    mainWindow.webContents.on('new-window', handleLink);

    // Emitted when the window is closing.
    mainWindow.on('close', function () {
        let data = {
            bounds: mainWindow.getBounds()
        };
        try {
            fs.writeFileSync(initPath, JSON.stringify(data));
        } catch (e) {
            console.log('Unable to save save init.json: ', e);
        }
    });

    // Emitted when the window is closed.
    mainWindow.on('closed', function () {
        // Dereference the window object, usually you would store windows
        // in an array if your app supports multi windows, this is the time
        // when you should delete the corresponding element.
        mainWindow = null;
    });

    app.on('browser-window-focus', function() {
        setTimeout(function() { mainWindow.webContents.focus(); }, 0);
        setTimeout(function() { mainWindow.webContents.executeJavaScript("document.getElementById(\"sendMessage\").focus()"); }, 0);
    });
}

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', function() {
    createWindow();
});


// Listen for badge changes
ipcMain.on('badge', function(event, arg) {
    if (process.platform === "darwin") {
        app.dock.setBadge(String(arg));
    }
    else if (process.platform === "win32") {
        let n = parseInt(arg, 10);
        // Only show notifications with number
        if (isNaN(n)) {
            return;
        }
        if (n > 0) {
            mainWindow.setOverlayIcon(__dirname + '/assets/img/favicon.ico', String(arg));
        } else {
            mainWindow.setOverlayIcon(null, '');
        }
    }
});

// Quit when all windows are closed.
app.on('window-all-closed', function () {
    // On macOS it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== 'darwin') app.quit();
});

app.on('activate', function () {
    // On macOS it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (mainWindow === null) createWindow();
});

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.