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<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width,initial-scale=1">
  <title>Ensure inactive scollframes under OOPIFs hit-test properly</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
  <script src="helper_fission_utils.js"></script>
  <script src="apz_test_utils.js"></script>
  <script src="apz_test_native_event_utils.js"></script>
  <script>
    async function test() {
      const iframe = document.querySelector("iframe");
      await setupCrossOriginIFrame(iframe, "helper_fission_plain.html");
      const remoteType = await SpecialPowers.spawn(iframe, [], async () => {
        return await SpecialPowers.spawnChrome([], () => {
          return windowGlobalParent.domProcess.remoteType;
        });
      });
      if (remoteType === "web") {
        is(SpecialPowers.effectiveIsolationStrategy(), SpecialPowers.ISOLATION_STRATEGY.IsolateHighValue);
        ok(true, "Skipping this test since the document on example.com got loaded in the same content process");
        return;
      }
      let readyPromise = new Promise(resolve => {
        window.addEventListener("message", event => {
          let data = JSON.parse(event.data);
          if ("type" in data && data.type == "scrollableready") {
            let ids = {
              layersId: data.layersId,
              viewId: data.viewId
            };
            resolve(ids);
          }
        });
      });
      let result = await SpecialPowers.spawn(iframe, [], async () => {
        // Ensure the oopif is scrollable, and wait for the paint so that the
        // compositor also knows it's scrollable.
        content.document.body.style.height = "200vh";
        await content.wrappedJSObject.promiseApzFlushedRepaints();
        let utils = SpecialPowers.getDOMWindowUtils(content.window);
        let data = JSON.stringify({
          type: "scrollableready",
          layersId: utils.getLayersId(),
          viewId: utils.getViewId(content.document.scrollingElement)
        });
        dump(`OOPIF computed IDs ${data}\n`);
        content.window.parent.postMessage(data, "*");
        return true;
      });
      ok(result, "Successfully made OOP iframe scrollable");
      let oopifScrollerIds = await readyPromise;
      // The #scroller div is (a) inactive, and (b) under the OOPIF. Hit-testing
      // against it should hit the OOPIF.
      checkHitResult(await hitTestOOPIF(centerOf("scroller"), iframe),
        APZHitResultFlags.VISIBLE,
        oopifScrollerIds.viewId,
        oopifScrollerIds.layersId,
        "Part of OOPIF sitting on top of the inactive scrollframe should hit OOPIF");
    }
    if (!SpecialPowers.Services.appinfo.fissionAutostart) {
      ok(true, "This test doesn't need to run with disabling Fission");
      subtestDone();
    } else {
      waitUntilApzStable()
        .then(test)
        .then(subtestDone, subtestFailed);
    }
  </script>
</head>
<body>
  <style>
    html,
    body {
      margin: 0;
    }
    body {
      /* Ensure root document is scrollable so that #scroller is inactive by
      default */
      height: 200vh;
    }
    iframe {
      position: fixed;
      top: 0;
      left: 0;
      width: 300px;
      height: 200px;
    }
    #scroller {
      width: 200px;
      height: 200px;
      background-color: transparent;
      overflow-y: scroll;
    }
  </style>
  <div id="scroller">
    <div style="height:500px">inside scroller</div>
  </div>
  <iframe id="testframe"></iframe>
</body>
</html>