tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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content-visibility-039.html (2015B)

      1 <!doctype HTML>
      2 <html>
      3 <meta charset="utf8">
      4 <title>Display Locking: measure forced SVG text</title>
      5 <link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
      6 <link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
      7 <meta name="assert" content="content-visibility hidden svg descendant has correct layout">
      8 
      9 <style>
     10 #container {
     11  width: 100px;
     12  height: 100px;
     13  background: lightgreen;
     14 }
     15 .hidden {
     16  content-visibility: hidden;
     17 }
     18 </style>
     19 
     20 <div id="parent"></div>
     21 
     22 <script src="/resources/testharness.js"></script>
     23 <script src="/resources/testharnessreport.js"></script>
     24 
     25 <script>
     26 async_test((t) => {
     27  let length;
     28  function measureForced() {
     29    t.step(() => {
     30      length = document.getElementById("text").getComputedTextLength();
     31      assert_not_equals(length, 0, "forced");
     32 
     33    });
     34  }
     35 
     36  function measureWhenVisible() {
     37    t.step(() => {
     38      const visible_length = document.getElementById("text").getComputedTextLength();
     39      assert_not_equals(visible_length, 0, "when visible");
     40      assert_equals(visible_length, length, "when visible");
     41    });
     42  }
     43 
     44  function construct(container) {
     45    container.innerHTML = `
     46      <svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
     47        <style>
     48          .t { font: 10px sans-serif; }
     49        </style>
     50        <text id="text" x="10" y="10" class="t">This is text</text>
     51      </svg>
     52    `;
     53  }
     54 
     55  async function runTest() {
     56    const container = document.createElement("div");
     57    container.id = "container";
     58 
     59    document.getElementById("parent").appendChild(container);
     60    container.classList.add("hidden");
     61    requestAnimationFrame(() => {
     62      construct(container);
     63      measureForced();
     64 
     65      container.classList.remove("hidden");
     66      requestAnimationFrame(() => {
     67        measureWhenVisible();
     68        t.done();
     69      });
     70    });
     71  }
     72 
     73  window.onload = function() {
     74    requestAnimationFrame(() => requestAnimationFrame(runTest));
     75  };
     76 }, "Measure Forced SVG Text");
     77 </script>
     78 
     79 </html>