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main.js
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main.js
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const electron = require('electron');
// Module to control application life.
const {app, BrowserWindow, ipcMain} = electron;
// Developer Dependencies.
const isDev = !app.isPackaged;
if (isDev) {
require("electron-debug")();
}
// Additional Tooling.
const path = require('path');
const url = require('url');
// Get rid of the deprecated default.
app.allowRendererProcessReuse = true;
// 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;
/**
* Create the main application window.
*/
function createWindow() {
const display = electron.screen.getPrimaryDisplay();
// Create the browser window.
mainWindow = new BrowserWindow({
width: display.workArea.width,
height: display.workArea.height,
frame: true,
webPreferences: {
devTools: isDev,
nodeIntegration: false, // Disable nodeIntegration for security.
nodeIntegrationInWorker: false,
nodeIntegrationInSubFrames: false,
contextIsolation: true, // Protect against prototype pollution.
worldSafeExecuteJavaScript: true, // https://github.com/electron/electron/pull/24114
enableRemoteModule: false, // Turn off remote to avoid temptation.
preload: path.join(app.getAppPath(), 'app/preload.js'),
},
});
// and load the index.html of the app.
mainWindow.loadURL(
url.format({
pathname: path.join(app.getAppPath(), 'app/index.html'),
protocol: 'file:',
slashes: true,
}),
);
// Emitted when the window is closed.
mainWindow.on('closed', () => {
// 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;
});
}
// 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', createWindow);
// Quit when all windows are closed.
app.on('window-all-closed', () => {
// On OS X 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();
}
});
// Extra security filters.
// See also: https://github.com/reZach/secure-electron-template
app.on('web-contents-created', (event, contents) => {
// Block navigation.
// https://electronjs.org/docs/tutorial/security#12-disable-or-limit-navigation
contents.on('will-navigate', (navevent) => {
navevent.preventDefault();
});
contents.on('will-redirect', (navevent) => {
navevent.preventDefault();
});
// https://electronjs.org/docs/tutorial/security#11-verify-webview-options-before-creation
contents.on('will-attach-webview', (webevent, webPreferences) => {
// Strip away preload scripts.
delete webPreferences.preload;
delete webPreferences.preloadURL;
// Disable Node.js integration.
webPreferences.nodeIntegration = false;
});
// Block new windows from within the App
// https://electronjs.org/docs/tutorial/security#13-disable-or-limit-creation-of-new-windows
contents.on('new-window', async (newevent) => {
newevent.preventDefault();
});
});
app.on('activate', () => {
// On OS X 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();
}
});
/**
* Example IPC message handler.
*/
ipcMain.on('sample_message', (event, args) => {
// Sample useless response.
mainWindow.webContents.send('sample_response', {
message: 'Interface sent a message to main: ' + args.message_content,
});
return true;
});