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# Register the port recieved from the parent window, and stop listening for messages on the window object.
window.addEventListener "message", (event) ->
return unless event.source == window.parent
currentFunction = arguments.callee
# Check event.data against iframeMessageSecret so we can determine that this message hasn't been spoofed.
chrome.storage.local.get "iframeMessageSecret", ({iframeMessageSecret: secret}) ->
return unless event.data == secret
UIComponentServer.portOpen event.ports[0]
window.removeEventListener "message", currentFunction # Stop listening for message events.
UIComponentServer =
ownerPagePort: null
messageEventListeners: []
portOpen: (@ownerPagePort) ->
@ownerPagePort.onmessage = (event) => @handleMessage event
postMessage: (data) -> @ownerPagePort.postMessage data
# Execute each event listener on the current event until we get a falsy return value.
handleMessage: (event) ->
for listener in @messageEventListeners
retVal = listener.call this, event
return false unless retVal
true
addEventListener: (type, listener) ->
if type == "message"
@messageEventListeners.push listener
undefined
removeEventListener: (type, listener) ->
if type == "message"
listenerIndex = @messageEventListeners.indexOf listener
if listenerIndex > -1
@messageEventListeners = @messageEventListeners.splice listenerIndex, 1
undefined
root = exports ? window
root.UIComponentServer = UIComponentServer
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