layout/generic/test/test_selection_cross_shadow_boundary_1_backward_drag.html


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<!DOCTYPE HTML>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="application/javascript" src="/tests/layout/generic/test/selection_cross_shadow_boundary_helper.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<script>
SimpleTest.waitForExplicitFinish();

function run() {
  document.getElementById("host").attachShadow({ mode: "open" }).innerHTML = "<span>InnerText</span>";

  const inner = host.shadowRoot.firstChild;
  const rect = inner.getBoundingClientRect();

  // Drag from the bottom right of InnerText to the
  // top left of OuterText.
  drag(
    inner,
    rect.width,
    rect.height,
    document.getElementById("outer"),
    0,
    0);

  // Above drag selects both "OuterText" and "InnerText"
  const sel = document.getSelection().getComposedRanges(host.shadowRoot)[0];

  // backward selection
  is(sel.endContainer, inner.firstChild, "endContainer is the InnerText");
  is(sel.endOffset, 9, "endOffset ends at the last character");
  is(sel.startContainer, outer.firstChild, "startContainer is the OuterText");
  is(sel.startOffset, 0, "startOffset starts at the first character");

  SimpleTest.finish();
}
</script>
<body onload="SimpleTest.waitForFocus(run);">
  <span id="outer">OuterText</span>
  <div id="host"></div>
</body>