text: // This helper remembers the size and position of your windows (and restores
  // them in that place after app relaunch).
  // Can be used for more than one window, just construct many
  // instances of it and give each different name.
  
  import { app, BrowserWindow, screen } from 'electron'
  import jetpack from 'fs-jetpack'
  
  export default function (name, options) {
    var userDataDir = jetpack.cwd(app.getPath('userData'))
    var stateStoreFile = 'window-state-' + name + '.json'
    var defaultSize = {
      width: options.width,
      height: options.height
    }
    var state = {}
    var win
  
    var restore = function () {
      var restoredState = {}
      try {
        restoredState = userDataDir.read(stateStoreFile, 'json')
      } catch (err) {
        // For some reason json can't be read (might be corrupted).
        // No worries, we have defaults.
      }
      return Object.assign({}, defaultSize, restoredState)
    }
  
    var getCurrentPosition = function () {
      var position = win.getPosition()
      var size = win.getSize()
      return {
        x: position[0],
        y: position[1],
        width: size[0],
        height: size[1]
      }
    }
  
    var windowWithinBounds = function (windowState, bounds) {
      return windowState.x >= bounds.x &&
      windowState.y >= bounds.y &&
      windowState.x + windowState.width <= bounds.x + bounds.width &&
      windowState.y + windowState.height <= bounds.y + bounds.height
    }
  
    var resetToDefaults = function (windowState) {
      var bounds = screen.getPrimaryDisplay().bounds
      return Object.assign({}, defaultSize, {
        x: (bounds.width - defaultSize.width) / 2,
        y: (bounds.height - defaultSize.height) / 2
      })
    }
  
    var ensureVisibleOnSomeDisplay = function (windowState) {
      var visible = screen.getAllDisplays().some(function (display) {
        return windowWithinBounds(windowState, display.bounds)
      })
      if (!visible) {
        // Window is partially or fully not visible now.
        // Reset it to safe defaults.
        return resetToDefaults(windowState)
      }
      return windowState
    }
  
    var saveState = function () {
      if (!win.isMinimized() && !win.isMaximized()) {
        Object.assign(state, getCurrentPosition())
      }
      userDataDir.write(stateStoreFile, state, { atomic: true })
    }
  
    state = ensureVisibleOnSomeDisplay(restore())
  
    win = new BrowserWindow(Object.assign({}, options, state))
  
    win.on('close', saveState)
  
    return win
  }
  