!7

html {
  if (eq(uri, "/worker.js"))
    ret [[
      postMessage("WORKING!");
      var startTime = new Date();
      var i = 0;
      while (true) {
        i = i+1;
        if ((i % 1000000) == 0) {
          var ms = new Date()-startTime;
          var mips = (i/ms/1000).toFixed(2);
          postMessage("Counted to: " + i + " in " + ms + " ms ("
            + mips + " million steps/s)");
          if (ms >= 12000) {
            postMessage("restart");
            break;
          }
        }
      }
    ]];
    
  ret htitle("Web Worker Test")
    + hbody(
      p("Count numbers: " + hfulltag("output", "", id := "result"))
    + p(hbutton("Restart Worker", onClick := "restart()"))
  + hjavascript([[
    var worker;
    
    function restart() {
      worker.terminate();
      go();
    }
    
    function go() {
      if (typeof(Worker) === "undefined") {
        document.getElementById("result").innerHTML = "Sorry, your browser does not support Web Workers...";
        return;
      }
      document.getElementById("result").innerHTML = "Making web worker";
      worker = new Worker($LINK);
      worker.onmessage = function(event) {
        if (event.data == "restart")
          restart();
        else
          document.getElementById("result").innerHTML = event.data;
      };
    }
  ]]).replace("$LINK", jsQuote(relativeRawBotLink(programID(), "worker.js"))), onLoad := "go()");
}