author Emilio Cobos Álvarez <>
Thu, 29 Aug 2019 21:25:12 +0000
changeset 490740 49ff97acd5ce9f094430bf4538e7f32792201182
parent 469642 0d9b9b96f5475adbed73922da696aeff7cbbaed3
permissions -rw-r--r--
Bug 1577258 - Explicitly flush layout in an a11y test. r=eeejay We have an optimization to avoid an expensive reflow from SetFullZoom, see mSuppressResizeReflow[1]. That was done because we used to do a full synchronous reflow right after. We no longer do that, but due to that member we also don't invalidate! My second patch in this bug changes the behavior of that flag so that we don't synchronously reflow, but we do invalidate. So in turn this test before the change wasn't really testing the zoomed code-path since it was using the clean layout from before the zoom operation. a11y getBounds and co. don't flush layout (they probably should), but since with my patch we dirty the frame tree, and dirty frames return bogus offsets, the test starts failing. Flush layout explicitly to ensure we're testing the zoomed code path. [1]: Differential Revision:

<!DOCTYPE html>
  <title>nsIAccessible::childAtPoint() 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 src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>

  <script type="application/javascript"
  <script type="application/javascript"
  <script type="application/javascript"

  <script type="application/javascript">
    function doPreTest() {
      waitForImageMap("imgmap", doTest);

    function doTest() {
      // Not specific case, child and deepchild testing.
      var list = getAccessible("list");
      var listitem = getAccessible("listitem");
      var image = getAccessible("image");
if (!MAC) {
      testChildAtPoint(list, 1, 1, listitem, image.firstChild);
} else {
      todo(false, "Bug 746974 - children must match on all platforms, disable failing test on Mac");

      // ::MustPrune case (in this case childAtPoint doesn't look inside a
      // textbox), point is inside of textbox.
      var txt = getAccessible("txt");
      testChildAtPoint(txt, 1, 1, txt, txt);

      // ::MustPrune case, point is outside of textbox accessible but is in
      // document.
      testChildAtPoint(txt, -1, 1, null, null);

      // ::MustPrune case, point is outside of root accessible.
      testChildAtPoint(txt, -10000, 10000, null, null);

      // Not specific case, point is inside of btn accessible.
      var btn = getAccessible("btn");
      testChildAtPoint(btn, 1, 1, btn, btn);

      // Not specific case, point is outside of btn accessible.
      testChildAtPoint(btn, -1, 1, null, null);

      // Out of flow accessible testing, do not return out of flow accessible
      // because it's not a child of the accessible even visually it is.
      var rectArea = getNode("area").getBoundingClientRect();
      var outOfFlow = getNode("outofflow"); = rectArea.left + "px"; = + "px";

      testChildAtPoint("area", 1, 1, "area", "area");

      // Test image maps. Their children are not in the layout tree.
      var theLetterA = getAccessible("imgmap").firstChild;
      hitTest("imgmap", theLetterA, theLetterA);
      hitTest("container", "imgmap", theLetterA);

      // hit testing for element contained by zero-width element
      hitTest("container2", "container2_input", "container2_input");


  <a target="_blank"
     title="nsIAccessible::childAtPoint() tests">Mozilla Bug 491657</a>
  <p id="display"></p>
  <div id="content" style="display: none"></div>
  <pre id="test">

  <div role="list" id="list">
    <div role="listitem" id="listitem"><span role="image" id="image">img</span>item</div>

  <span role="button">button1</span><span role="button" id="btn">button2</span>

  <span role="textbox">textbox1</span><span role="textbox" id="txt">textbox2</span>

  <div id="outofflow" style="width: 10px; height: 10px; position: absolute; left: 0px; top: 0px; background-color: yellow;">
  <div id="area" style="width: 100px; height: 100px; background-color: blue;"></div>

  <map name="atoz_map">
    <area href=""
          coords="0,0,15,15" alt="thelettera" shape="rect"/>

  <div id="container">
    <img id="imgmap" width="447" height="15" usemap="#atoz_map" src="../letters.gif"/>

  <div id="container2" style="width: 0px">
    <input id="container2_input">