Use GuestWindowManager to mange windows created by window.open

atom/browser/lib/guest-window-manager.coffee

@@ -0,0 +1,60 @@
+ipc = require 'ipc'
+v8Util = process.atomBinding 'v8_util'
+BrowserWindow = require 'browser-window'
+
+guestWindows = new WeakMap
+
+# Callback that registered to "closed" event of guest.
+guestUserCloseCallback = ->
+  embedderId = v8Util.getHiddenValue this, 'embedderId'
+  removeGuest embedderId, @id
+
+# Get all guests created in a window.
+getGuestsFromEmbedder = (embedderWindow) ->
+  unless guestWindows.has embedderWindow
+    guests = []
+    guestWindows.set embedderWindow, guests
+    # Close all guests when window is closed.
+    embedderWindow.on 'closed', ->
+      for guest in guests
+        # Avoid double removing window from guests.
+        guest.removeListener 'closed', guestUserCloseCallback
+        # Just close without emitting "beforeunload" event.
+        guest.destroy()
+  guestWindows.get embedderWindow
+
+# Remove a guest window.
+removeGuest = (embedderId, guestId) ->
+  guests = getGuestsFromEmbedder BrowserWindow.windows.get(embedderId)
+  for guest, i in guests
+    if guest.id == guestId
+      guests.splice i, 1
+      return guest
+
+# Create a new guest created by |embedder| with |options|.
+createGuest = (embedder, url, options) ->
+  embedderWindow = BrowserWindow.fromWebContents embedder
+  guests = getGuestsFromEmbedder embedderWindow
+
+  guest = new BrowserWindow(options)
+  guest.loadUrl url
+
+  # Remove self from guest list when user closes guest window.
+  v8Util.setHiddenValue guest, 'embedderId', embedderWindow.id
+  guest.on 'closed', guestUserCloseCallback
+
+  guests.push guest
+  [embedderWindow.id, guest.id]
+
+# Routed window.open messages.
+ipc.on 'ATOM_SHELL_GUEST_WINDOW_MANAGER_WINDOW_OPEN', (event, args...) ->
+  event.sender.emit 'new-window', event, args...
+  if event.sender.isGuest() or event.defaultPrevented
+    event.returnValue = null
+  else
+    [url, frameName, options] = args
+    event.returnValue = createGuest event.sender, url, options
+
+ipc.on 'ATOM_SHELL_GUEST_WINDOW_MANAGER_WINDOW_CLOSE', (event, args...) ->
+  guest = removeGuest args...
+  guest.destroy()