Quelle frame_visibility_in_iframe.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/layout/generic/test/frame_visibility_in_iframe.html

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Video element visibility in iframe</title>
</head>
<body>
<div style="width: 100%; height: calc(100vh - 100px);"></div>
<div style="height: 100px; overflow: scroll;">
  
  <div style="width: 100%; height: 200px;"></div>
  <iframe id="iframe" style="height: 100px; border: none;"></iframe>
</div>
<script>
const add_task = window.opener.add_task;
const SimpleTest = window.opener.SimpleTest;
const original_finish = window.opener.SimpleTest.finish;

// add_task calls SimpleTest.finish() when it finished, we want to close this
// window before SimpleTest.finish() gets called.
SimpleTest.finish = function finish() {
  self.close();
  original_finish();
}

add_task(async () => {
  const iframe = document.getElementById("iframe");
  await new Promise(resolve => {
    iframe.addEventListener("load", () => { resolve(); }, { once: true });
    iframe.src = "http://example.org/tests/layout/generic/test/frame_visibility_in_iframe_child.html";
  });

  await SpecialPowers.spawn(iframe, [], async () => {
    // With layout.visibility.min-recompute-interval-ms=0 value, flushing layout
    // and waiting two frames would be sufficient to make sure at least one
    // RebuildApproximateFrameVisibility call was done. This would avoid the
    // situation we consider the video element is invisible without doing any
    // frame visibility tracking stuff.
    content.document.documentElement.getBoundingClientRect();
    await new Promise(resolve => content.window.requestAnimationFrame(resolve));
    await new Promise(resolve => content.window.requestAnimationFrame(resolve));
  });

  await SpecialPowers.spawn(iframe, [], async () => {
    const video = content.document.querySelector("video");
    Assert.ok(!SpecialPowers.wrap(video).isInViewPort,
              "The video element should not be in the viewport");
  });
});
</script>
</body>
</html>

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