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<!DOCTYPE html>
<html id="helper_wide_crossorigin_iframe_child_docelement">
<meta charset=utf-8>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="apz_test_utils.js"></script>
  <script src="apz_test_native_event_utils.js"></script>
<style>
html {
    border: 5px solid lime;
    background: yellow;
    box-sizing: border-box;
    overflow-y: scroll;
}
</style>
<script>
  // negative means keep sending forever
  // we flip this to 10 when we hit onload, so that we send several
  // before load and some after.
  let numMoreTimesToSend = -1;
  function sendDpToParent() {
    if (numMoreTimesToSend > 0) {
      numMoreTimesToSend--;
    }
    if (numMoreTimesToSend == 0) {
      clearInterval(intervalId);
      parent.postMessage("wereDone", "*");
      return;
    }
    let dp = getLastContentDisplayportFor(
      "helper_wide_crossorigin_iframe_child_docelement",
      { expectPainted: false }
    );
    if (dp != null) {
      info("result " + dp.x + " " + dp.y + " " + dp.width + " " + dp.height);
      parent.postMessage(dp, "*");
    } else {
      info("no dp yet");
    }
  }
  sendDpToParent();
  setTimeout(sendDpToParent,0);
  let intervalId = setInterval(sendDpToParent, 100);
  addEventListener("MozAfterPaint", sendAndSetTimeout);
  function sendAndSetTimeout() {
    sendDpToParent();
    setTimeout(sendDpToParent,0);
  }
  window.requestAnimationFrame(checkAndSendRaf);
  function checkAndSendRaf() {
    if (numMoreTimesToSend != 0) {
      window.requestAnimationFrame(checkAndSendRaf);
    }
    sendDpToParent();
    setTimeout(sendDpToParent,0);
  }
  window.onload = onloaded;
  window.onDOMContentLoaded = sendDpToParent;
  document.onreadystatechange = sendDpToParent;
  document.onvisibilitychange = sendDpToParent;
  function onloaded() {
    numMoreTimesToSend = 10;
    sendDpToParent();
  }
</script>
<div style="background: blue; height: 400vh;"></div>