Quelle helper_bug1756814.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/gfx/layers/apz/test/mochitest/helper_bug1756814.html

<!DOCTYPE HTML>
<html>
<head>
  <script type="application/javascript" src="apz_test_utils.js"></script>
  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
</head>
<body>
  <div style="height: 200vh;"></div>
</body>
<script type="application/javascript">

async function test() {
  const moveDistance = 10;

  // Start dragging the vertical scrollbar thumb.
  const startPoint = await scrollbarDragStart(window, 1);
  await promiseNativeMouseEventWithAPZ({
    target: window,
    offsetX: startPoint.x,
    offsetY: startPoint.y,
    type: "mousemove",
  });
  await promiseNativeMouseEventWithAPZ({
    target: window,
    offsetX: startPoint.x,
    offsetY: startPoint.y,
    type: "mousedown",
  });

  // Move the thumb and wait for a scroll event triggered by the movement.
  let scrollEventPromise = waitForScrollEvent(window);
  await promiseNativeMouseEventWithAPZ({
    target: window,
    offsetX: startPoint.x,
    offsetY: startPoint.y + moveDistance,
    type: "mousemove",
  });
  await scrollEventPromise;

  let scrollPosition = window.scrollY;

  // Append an element to the scroll container to expand the scroll range.
  const content = document.createElement("div");
  content.style.height = "200vh";
  document.body.appendChild(content);

  // flush the above change.
  document.documentElement.getBoundingClientRect();

  // Make sure the change has been reflected into APZ.
  await promiseApzFlushedRepaints();

  // Move the thumb again.
  scrollEventPromise = waitForScrollEvent(window);
  await promiseNativeMouseEventWithAPZ({
    target: window,
    offsetX: startPoint.x,
    offsetY: startPoint.y + moveDistance * 2,
    type: "mousemove",
  });

  await scrollEventPromise;
  ok(window.scrollY <= scrollPosition * 2,
     `The scroll position ${window.scrollY} should be less than ${scrollPosition*2}`);

  await promiseNativeMouseEventWithAPZ({
    target: window,
    offsetX: startPoint.x,
    offsetY: startPoint.y + moveDistance * 2,
    type: "mouseup",
  });
}

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

</script>
</html>

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.15 Sekunden (vorverarbeitet am 2026-08-26) ¤

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