<!--
  Any copyright is dedicated to the Public Domain.
  http://creativecommons.org/publicdomain/zero/1.0/
-->
<!DOCTYPE HTML>
<html>
  <head>
    <title>Test for SharedWorker</title>
  </head>
  <body>
    <script type="text/javascript">
      "use strict";

      function postMessageToParentOrOpener(message) {
        if (parent != window) {
          parent.postMessage(message, "*");
        }
      }

      function debug(message) {
        if (typeof(message) != "string") {
          throw new Error("debug() only accepts strings!");
        }
        postMessageToParentOrOpener(message);
      }

      let worker;

      window.addEventListener("message", function(event) {
        if (!worker) {
          worker = new SharedWorker("multi_sharedWorker_sharedWorker.js",
                                    "FrameWorker");
          worker.onerror = function(error) {
            debug("Worker error: " + error.message);
            error.preventDefault();

            let data = {
              type: "error",
              message: error.message,
              filename: error.filename,
              lineno: error.lineno,
              isErrorEvent: error instanceof ErrorEvent
            };
            postMessageToParentOrOpener(data);
          };

          worker.port.onmessage = function(msg) {
            debug("Worker message: " + JSON.stringify(msg.data));
            postMessageToParentOrOpener(msg.data);
          };
        }

        debug("Posting message: " + JSON.stringify(event.data));
        worker.port.postMessage(event.data);
      });
    </script>
  </body>
</html>
