main.js

'use strict'

const electron = require('electron')
const { app, BrowserWindow, ipcMain, nativeImage, shell, Menu } = electron // Module to control application life.
const path = require('path')
const openAboutWindow = require('about-window').default

let socket
// Report crashes to our server.
// require('crash-reporter').start()

// 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 = null
let golangMode = false
const aboutWindow = () => {
  const extLicense = `
    <div style="text-align: left">
    <p>The Go gopher was designed by Renee French. (<a href="http://reneefrench.blogspot.com/">http://reneefrench.blogspot.com/</a>)</p>
    <p>The gopher 3D model was made by Takuya Ueda (<a href="https://twitter.com/tenntenn">https://twitter.com/tenntenn</a>). Licensed under the Creative Commons 3.0 Attributions license.</p>
    </div>
    `
  const bw = openAboutWindow({
    icon_path: path.join(__dirname, 'gopheron_icon.png'),
    package_json_dir: __dirname,
    description: extLicense, //`<iframe width="100%" src="file://${__dirname}/license.html"></iframe>`,
    use_inner_html: true,
    adjust_window_size: true,
    win_options: {
      minWidth: 640,
      minHeight: 480
    }
  })
  bw.webContents.on('new-window', (event, url) => {
    event.preventDefault()
    shell.openExternal(url)
  })
}

if (JSON.stringify(process.argv).indexOf('--with-golang') > 0) {
  // golang mode.
  socket = require('socket.io-client')('http://localhost:5050/gopheron')
  golangMode = true
  socket.on('front', (data) => {
    //console.log(`bringToFront: ${data}`) // prints "ping"
    mainWindow.setAlwaysOnTop(true)
    setTimeout(() => {
      mainWindow.setAlwaysOnTop(false)
    }, data)
  })
}

if (process.platform.indexOf('linux') >= 0) {
  app.commandLine.appendSwitch('--enable-transparent-visuals')
  app.commandLine.appendSwitch('--disable-gpu')
}

// 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()
  }
})

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
app.on('ready', () => {
  if (golangMode) {
    socket.emit('electron start', 'status OK')
  }

  app.setName('gopheron')

  const iconimage = nativeImage.createFromPath(`${__dirname}/gopheron_icon.png`)
  if (app.dock) {
    // macOS only
    app.dock.setIcon(iconimage)
    const dockMenu = Menu.buildFromTemplate([{
        label: 'About gopheron',
        click: function () {
          console.log('About gopheron')
          aboutWindow()
        }
      }
    ])

    app.dock.setMenu(dockMenu)
  }

  const electronScreen = electron.screen
  const size = electronScreen.getPrimaryDisplay().workAreaSize
  // Create the browser window.
  mainWindow = new BrowserWindow({
    width: size.width - 1,
    height: size.height,
    frame: false,
    transparent: true,
    hasShadow: false,
    titleBarStyle: 'hiddenInset'
  })

  if (mainWindow.setIcon) {
    // For windows and Linux
    mainWindow.setIcon(iconimage)

    const playIcon = nativeImage.createFromPath(path.join(__dirname, 'asset', 'about_icon.png'))
    const buttons = [{
      tooltip: 'About gopheron...',
      icon: playIcon,
      click: aboutWindow,
      flags: ['dismissonclick']
    }]
    mainWindow.setThumbarButtons(buttons)
  }

  mainWindow.on('ready-to-show', () => {
    mainWindow.show()
    mainWindow.focus()
  })
  // and load the index.html of the app.
  mainWindow.loadURL(`file://${__dirname}/index.html?golang=${golangMode}`)
  if (!process.env.DEBUG) {
    mainWindow.setIgnoreMouseEvents(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
    })

  ipcMain.on('bringToFront', (event, arg) => {
    console.log(`bringToFront: ${arg}`) // prints "ping"
    mainWindow.setAlwaysOnTop(true)
    setTimeout(() => {
      mainWindow.setAlwaysOnTop(false)
    }, arg)
  })
})