gfx/layers/apz/test/mochitest/helper_zoom_keyboardscroll.html
author James Teh <jteh@mozilla.com>
Wed, 01 Feb 2023 05:02:01 +0000
changeset 651150 dd0fdd1daa69783be36acd5c50544f3694eaa8f9
parent 647490 3f7a6c650a857ccf7f1db7fb42101d4167fb7e1b
permissions -rw-r--r--
Bug 1813980: Check IsDoc before Parent in RemoteAccessibleBase::ApplyCrossDocOffset. r=morgan We call this function on every ancestor when calculating bounds. RemoteParent() currently requires a hash lookup, so it's more efficient to early return for !IsDoc() first. This is a micro-optimisation, but it might have some impact given that we call this on every ancestor, especially when hit testing, where we call Bounds() a lot. As a bit of drive-by cleanup, use RemoteParent() rather than calling Parent() and IsRemote/AsRemote(). Differential Revision: https://phabricator.services.mozilla.com/D168346

<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, minimum-scale=1.0">
  <title>Tests that keyboard arrow keys scroll after zooming in when there was no scrollable overflow before zooming</title>
  <script src="/tests/SimpleTest/EventUtils.js"></script>
  <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>
</head>
<body>
  <div style="height: 20000px; background-color: green"></div>
  <script type="application/javascript">
    const utils = SpecialPowers.getDOMWindowUtils(window);

    async function test() {
      is(await getResolution(), 1.0, "should not be zoomed (1)");

      is(window.scrollX, 0, "shouldn't have scrolled (2)");
      is(window.scrollY, 0, "shouldn't have scrolled (3)");
      is(visualViewport.pageTop, 0, "shouldn't have scrolled (4)");
      is(visualViewport.pageLeft, 0, "shouldn't have scrolled (5)");

      // Zoom in
      SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(2.0);
      await promiseApzFlushedRepaints();
      await promiseFrame();

      is(await getResolution(), 2.0, "should have zoomed (6)");

      is(window.scrollX, 0, "shouldn't have scrolled (7)");
      is(window.scrollY, 0, "shouldn't have scrolled (8)");
      is(visualViewport.pageTop, 0, "shouldn't have scrolled (9)");
      is(visualViewport.pageLeft, 0, "shouldn't have scrolled (10)");

      window.synthesizeKey("KEY_ArrowRight");

      await promiseApzFlushedRepaints();
      await promiseFrame();

      is(await getResolution(), 2.0, "should be zoomed (11)");

      is(window.scrollX, 0, "shouldn't have scrolled (12)");
      is(window.scrollY, 0, "shouldn't have scrolled (13)");
      is(visualViewport.pageTop, 0, "shouldn't have scrolled (14)");
      isnot(visualViewport.pageLeft, 0, "should have scrolled (15)");

      window.synthesizeKey("KEY_ArrowDown");

      await promiseApzFlushedRepaints();
      await promiseFrame();

      is(await getResolution(), 2.0, "should be zoomed (16)");

      is(window.scrollX, 0, "shouldn't have scrolled (17)");
      is(window.scrollY, 0, "shouldn't have scrolled (18)");
      isnot(visualViewport.pageTop, 0, "should have scrolled (19)");
      isnot(visualViewport.pageLeft, 0, "should have scrolled (20)");

      // Zoom back out
      SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(1.0);
      await promiseApzFlushedRepaints();
      await promiseFrame();

      is(await getResolution(), 1.0, "should not be zoomed (21)");
    }

    waitUntilApzStable()
    .then(test)
    .then(subtestDone, subtestFailed);
  </script>
</body>
</html>