tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

invalid-fragment.https.html (2041B)

      1 <!DOCTYPE html>
      2 <html class=reftest-wait>
      3 <link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#invoke-a-layout-callback">
      4 <link rel="match" href="fallback-layout-fallback-ref.html">
      5 <meta name="assert" content="This test checks that a layout() class returning an invalid fragment will fallback to block layout." />
      6 <style>
      7 .test {
      8  background: red;
      9  border: solid 2px;
     10  width: 100px;
     11 }
     12 
     13 .test > div {
     14  height: 100px;
     15 }
     16 
     17 @supports (display: layout(bad-request)) {
     18  .test {
     19    display: layout(bad-request);
     20    background: green;
     21  }
     22 }
     23 </style>
     24 <script src="/common/reftest-wait.js"></script>
     25 <script src="/common/worklet-reftest.js"></script>
     26 
     27 <div class="test">
     28  <div></div>
     29 </div>
     30 
     31 <script id="code" type="text/worklet">
     32 registerLayout('bad-request', class {
     33  static get inputProperties() { return ['--fail']; }
     34 
     35  async intrinsicSizes() {}
     36  async layout(children, _, __, styleMap) {
     37    if (styleMap.get('--fail').toString() !== 'true') {
     38      this.fragment = await children[0].layoutNextFragment({});
     39    }
     40 
     41    // Return, if the fragment is invalid (we skipped the if statement above)
     42    // we should fallback to block layout.
     43    return {autoBlockSize: 0, childFragments: [this.fragment]};
     44  }
     45 });
     46 </script>
     47 
     48 <script>
     49 function raf() {
     50  return new Promise((resolve) => {
     51    requestAnimationFrame(() => {
     52      resolve();
     53    });
     54  });
     55 }
     56 
     57 (async function() {
     58  if (typeof CSS.layoutWorklet === 'undefined') {
     59    takeScreenshot();
     60    return;
     61  }
     62 
     63  await importWorklet(CSS.layoutWorklet, document.getElementById('code').textContent);
     64 
     65  // Ensure that all instances have a child to perform an invalid layout upon.
     66  const test = document.getElementsByClassName('test')[0];
     67  for (let i = 0; i < 100; i++) {
     68    test.innerHTML = '<div><div>';
     69    await raf();
     70  }
     71 
     72  // The next layout should mean that we will fallback to block.
     73  test.innerHTML = '<div></div>';
     74  test.style.setProperty('--fail', 'true');
     75 
     76  // Finish up the test.
     77  await raf();
     78  await raf();
     79  takeScreenshot();
     80 })();
     81 </script>
     82 </html>