gecko-dev/layout/xul/test/test_bug467442.xhtml

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<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=467442
-->
<window title="Mozilla Bug 467442"
onload="onload()"
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
<!-- test code goes here -->
<popupset>
<panel id="panel">
Hello.
</panel>
</popupset>
<hbox>
<button id="anchor" label="Anchor hello on here" style="transform: translate(100px, 0)"/>
</hbox>
<script type="application/javascript">
<![CDATA[
SimpleTest.waitForExplicitFinish();
function onload() {
/** Test for Bug 467442 **/
let panel = document.getElementById("panel");
let anchor = document.getElementById("anchor");
panel.addEventListener("popupshown", function onpopupshown() {
let panelRect = panel.getBoundingClientRect();
let anchorRect = anchor.getBoundingClientRect();
is(panelRect.left, anchorRect.left, "Panel should be anchored to the button");
panel.addEventListener("popuphidden", function onpopuphidden() {
SimpleTest.finish();
}, { once: true });
panel.hidePopup();
}, { once: true });
panel.openPopup(anchor, "after_start", 0, 0, false, false);
}
]]>
</script>
<!-- test results are displayed in the html:body -->
<body xmlns="http://www.w3.org/1999/xhtml">
<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=467442"
target="_blank">Mozilla Bug 467442</a>
</body>
</window>