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# Fetch the Vimium secret, register the port recieved from the parent window, and stop listening for messages
# on the window object. vimiumSecret is accessible only within the current instantion of Vimium. So a
# malicious host page trying to register its own port can do no better than guessing.
registerPort = (event) ->
chrome.storage.local.get "vimiumSecret", ({vimiumSecret: secret}) ->
return unless event.source == window.parent and event.data == secret
UIComponentServer.portOpen event.ports[0]
window.removeEventListener "message", registerPort
window.addEventListener "message", registerPort
UIComponentServer =
ownerPagePort: null
handleMessage: null
portOpen: (@ownerPagePort) ->
@ownerPagePort.onmessage = (event) =>
@handleMessage event if @handleMessage
registerHandler: (@handleMessage) ->
postMessage: (message) ->
@ownerPagePort.postMessage message if @ownerPagePort
root = exports ? window
root.UIComponentServer = UIComponentServer
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