Quelle test_media.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/accessible/tests/mochitest/tree/test_media.html

<!DOCTYPE html>
<html>

<head>
  <title>HTML5 audio/video tests</title>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <script type="application/javascript"
          src="../common.js"></script>
  <script type="application/javascript"
          src="../role.js"></script>
  <script type="application/javascript"
          src="../states.js"></script>
  <script type="application/javascript"
          src="../promisified-events.js"></script>

  <script type="application/javascript">

    async function loadAudioSource() {
      /**
       * Setting the source dynamically and wait for it to load,
       * so we can test the accessibility tree of the control in its ready and
       * stable state.
       *
       * See bug 1484048 comment 25 for discussion on how it switches UI when
       * loading a statically declared source.
       */
      const bufferA11yShown = waitForEvent(
        EVENT_SHOW,
        evt => evt.accessible.role == ROLE_TEXT_LEAF &&
          evt.accessible.indexInParent == 2 &&
          evt.accessible.parent.role == ROLE_STATUSBAR
      );
      await new Promise(resolve => {
        let el = document.getElementById("audio");
        el.addEventListener("canplaythrough", resolve, {once: true});
        el.src = "../bug461281.ogg";
      });
      // Wait for this to be reflected in the a11y tree.
      await bufferA11yShown;

      // Give Fluent time to update the value of the scrubber asynchronously.
      let scrubber = document.getElementById("audio")
                             .openOrClosedShadowRoot.getElementById("scrubber");
      await SimpleTest.promiseWaitForCondition(() =>
        scrubber.getAttribute("aria-valuetext") == "0:00 / 0:02");

      doTest();
    }

    function doTest() {
      // ////////////////////////////////////////////////////////////////////////
      // test the accessible tree

      var accTree = {
        role: ROLE_GROUPING,
        children: [
          { // start/stop button
            role: ROLE_PUSHBUTTON,
            name: "Play",
            children: [],
          },
          { // buffer bar
            role: ROLE_STATUSBAR,
            children: [
              {
                role: ROLE_TEXT_LEAF,
                name: "Loading:",
              },
              {
                role: ROLE_TEXT_LEAF,
                name: " ",
              },
              {
                role: ROLE_TEXT_LEAF,
                // The name is the percentage buffered; e.g. "0%", "100%".
                // We can't check it here because it might be different
                // depending on browser caching.
              },
            ],
          },
          { // slider of progress bar
            role: ROLE_SLIDER,
            name: "Position",
            value: "0:00 / 0:02",
            children: [],
          },
          { // mute button
            role: ROLE_PUSHBUTTON,
            name: "Mute",
            children: [],
          },
          { // slider of volume bar
            role: ROLE_SLIDER,
            children: [],
            name: "Volume",
          },
        ],
      };
      testAccessibleTree("audio", accTree);

      SimpleTest.finish();
    }

    SimpleTest.waitForExplicitFinish();
    addA11yLoadEvent(loadAudioSource);
  </script>
</head>
<body>

  <a target="_blank"
     title="Expose HTML5 video and audio elements' embedded controls through accessibility APIs"
     href="https://bugzilla.mozilla.org/show_bug.cgi?id=483573">Mozilla Bug 483573</a>
  <p id="display"></p>
  <div id="content" style="display: none"></div>
  <pre id="test">
  </pre>

  <audio id="audio" controls="true"></audio>

  <div id="eventDump"></div>
</body>
</html>

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