main.js

// Modules to control application life and create native browser window
const { app, BrowserWindow, Menu, MenuItem } = require('electron')
const path = require('path')
const isMac = process.platform === 'darwin'
const shell = require('electron').shell

function createWindow() {
  createSpecificWindow('https:///gitpod.idi.ntnu.no')
}

function createSpecificWindow(urlToLoad) {
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    titleBarStyle: 'hidden',
    width: 800,
    height: 600,
    icon: __dirname + '/media/AppIcon.icns',
    webPreferences: {
      preload: path.join(__dirname, 'preload.js')
    }
  })

  const template = [
    // { role: 'appMenu' }
    ...(isMac ? [{
      label: app.name,
      submenu: [
        { role: 'about' },
        { type: 'separator' },
        { role: 'services' },
        { type: 'separator' },
        { role: 'hide' },
        { role: 'hideothers' },
        { role: 'unhide' },
        { type: 'separator' },
        { role: 'quit' }
      ]
    }] : []),
    // { role: 'fileMenu' }
    {
      label: 'File',
      submenu: [
        isMac ? { role: 'close' } : { role: 'quit' }
      ]
    },
    // { role: 'editMenu' }
    {
      label: 'Edit',
      submenu: [
        { role: 'undo' },
        { role: 'redo' },
        { type: 'separator' },
        { role: 'cut' },
        { role: 'copy' },
        { role: 'paste' },
        ...(isMac ? [
          { role: 'pasteAndMatchStyle' },
          { role: 'delete' },
          { role: 'selectAll' },
          { type: 'separator' },
          {
            label: 'Speech',
            submenu: [
              { role: 'startSpeaking' },
              { role: 'stopSpeaking' }
            ]
          }
        ] : [
          { role: 'delete' },
          { type: 'separator' },
          { role: 'selectAll' }
        ])
      ]
    },
    // { role: 'viewMenu' }
    {
      label: 'View',
      submenu: [
        { role: 'reload' },
        { role: 'forceReload' },
        { role: 'toggleDevTools' },
        { type: 'separator' },
        { role: 'resetZoom' },
        { role: 'zoomIn' },
        { role: 'zoomOut' },
        { type: 'separator' },
        { role: 'togglefullscreen' }
      ]
    },
    // { role: 'windowMenu' }
    {
      label: 'Window',
      submenu: [
        { role: 'minimize' },
        { role: 'zoom' },
        { 
          label: 'Open in system browser',
          click() {
            shell.openExternal(urlToLoad)
          }
      },
        ...(isMac ? [
          { type: 'separator' },
          { role: 'front' },
          { type: 'separator' },
          { role: 'window' }
        ] : [
          { role: 'close' }
        ])
      ]
    },
    {
      role: 'help',
      submenu: [
        {
          label: 'Learn More',
          click: async () => {
            const { shell } = require('electron')
            await shell.openExternal('https://electronjs.org')
          }
        }
      ]
    }
  ]
  
  const menu = Menu.buildFromTemplate(template)
  Menu.setApplicationMenu(menu)

  // and load the index.html of the app.
  mainWindow.loadURL(urlToLoad)


  mainWindow.on('resize', (event) => {
    updateCSS(mainWindow)
  });

  mainWindow.webContents.on('did-finish-load', () => {
    updateCSS(mainWindow)
  })
  mainWindow.webContents.on('new-window', (event, url) => {
    event.preventDefault()
    createSpecificWindow(url)
  })

  mainWindow.webContents.on('zoom-changed', (event) => {
    updateCSS(mainWindow)
  })

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

function updateCSS(window) {
  var zoomFactor = window.webContents.getZoomFactor()
  var theiaPadding = 60 / zoomFactor
  if (window.isFullScreen()) {
    window.webContents.insertCSS('#theia-top-panel { padding-left: 0px; -webkit-app-region: drag; } header { -webkit-app-region: drag; }')
  } else {
    window.webContents.insertCSS('#theia-top-panel { padding-left: ' + theiaPadding + 'px; -webkit-app-region: drag; } header { -webkit-app-region: drag; }')
  }
}



// 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.whenReady().then(() => {
  createWindow()

  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 (BrowserWindow.getAllWindows().length === 0) createWindow()
  })
})

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

// 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.