Quelle helper_override_root.html Sprache: HTML

products/sources/formale Sprachen/C/Firefox/gfx/layers/apz/test/mochitest/helper_override_root.html

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width; initial-scale=1.0">
  <title>Simple wheel scroll cancellation</title>
  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
  <script type="application/javascript" src="apz_test_utils.js"></script>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
  <script type="application/javascript">

async function test() {
  let wheelEventPromise = new Promise(resolve => {
    // Add a non-passive listener on the document, so that we have a document-level
    // APZ-aware listener, and the entire document is put in the dispatch-to-content
    // region
    document.addEventListener("wheel", function(e) {
      // spin for 2 seconds to give APZ time to scroll, if the event region override
      // is broken and it decides not to wait for the main thread. Note that it's
      // possible the APZ controller thread is busy for whatever reason so APZ
      // may not scroll. That might cause this test to only fail intermittently
      // instead of consistently if the behaviour being tested regresses.
      var now = Date.now();
      while (Date.now() - now < 2000);

      // Cancel the scroll. If this works then we know APZ waited for this listener
      // to run.
      e.preventDefault();
      resolve()
    }, { passive: false });
  });

  // Ensure APZ gets a paint with the d-t-c region
  await promiseApzFlushedRepaints();

  await synthesizeNativeWheel(document.body, 100, 100, 0, -50);
  dump("Finished native wheel, waiting for listener to run...\n");

  await wheelEventPromise;
  await promiseOnlyApzControllerFlushed();

  is(window.scrollY, 0, "check that the window didn't scroll");
}

if (window.top != window) {
    dump("Running inside an iframe! stealing functions from window.top...\n");
    window.subtestDone = window.top.subtestDone;
    window.SimpleTest = window.top.SimpleTest;
    window.is = window.top.is;
    window.ok = window.top.ok;
}

waitUntilApzStable()
  .then(test)
  .then(subtestDone);

  </script>
</head>
<body style="height: 5000px; background-image: linear-gradient(green,red);">
  This page should not be wheel-scrollable.
</body>
</html>

Messung V0.5

¤ Dauer der Verarbeitung: 0.13 Sekunden (vorverarbeitet) ¤

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