Quelle helper_hittest_fixed.html

Sprache: HTML

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

<!DOCTYPE HTML>
<html>
<head>
  <title>APZ hit-testing of fixed content when async-scrolled</title>
  <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>
  <meta name="viewport" content="width=device-width"/>
  <style>
    html, body {
      margin: 0;
    }
    #fixed {
      position: fixed;
      height: 300px;
      width: 100%;
      top: 0;
      background: blue;
    }
    #target {
      margin-top: 100px;
      margin-left: 100px;
      height: 20px;
      width: 20px;
      background: red;
    }
  </style>
</head>
<body>
<div id="fixed">
   <div id="target"></div>
</div>
<div id="make_root_scrollable" style="height: 5000px"></div>
</body>
<script type="application/javascript">

async function test() {
  var config = getHitTestConfig();
  var utils = config.utils;

  // Async scroll the page by 50 pixels. The scroll does not move
  // the fixed element.
  utils.setAsyncScrollOffset(document.documentElement, 0, 50);
  // Tick the refresh driver once to make sure the compositor has applied the
  // async scroll offset (for WebRender hit-testing we need to make sure WR has
  // the latest info).
  utils.advanceTimeAndRefresh(16);
  utils.restoreNormalRefresh();

  let clickPromise = new Promise(resolve => {
    target.addEventListener("click", e => {
      ok(true, "Target was hit");
      e.stopPropagation();  // do not propagate event to |fixed| ancestor
      resolve();
    });
    fixed.addEventListener("click", () => {
      // Since target's listener calls stopPropagation(), if we get here
      // then the coordinates of the click event did not correspond to
      // |target|, but somewhere else on |fixed|.
      ok(false, "Fixed ancestor should not be hit");
      resolve();
    });
  });

  // Synthesize a click at (110, 110), which should hit |target| (a
  // descendant of |fixed|) regardless of the async scroll.
  await synthesizeNativeMouseEventWithAPZ({
    type: "click",
    target: window,
    offsetX: 110,
    offsetY: 110
  });

  await clickPromise;
}

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

</script>
</html>

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.11 Sekunden (vorverarbeitet am 2026-08-26) ¤

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