pjs/layout/reftests/invalidation/540247-1.xul

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<?xml version="1.0"?>
<window id="Test for bug 540247" title="Testcase" class="reftest-wait"
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script><![CDATA[
document.addEventListener("MozReftestInvalidate", runtest, false);
function runtest() {
// Make sure that the effects of the scroll are painted to the screen before
// shrinking the size of the scrolled frame.
window.addEventListener("MozAfterPaint", finish, false);
var sbo = document.getElementById('s').boxObject.
QueryInterface(Components.interfaces.nsIScrollBoxObject);
sbo.scrollTo(0, 1000);
}
function finish() {
document.getElementById('b').height = '100';
document.documentElement.className = "";
}
]]>
</script>
<scrollbox id="s" height="200" style="overflow: scroll;">
<vbox>
<vbox height="150" width="200" style="background: red;" id="b"/>
<vbox height="150" width="200" style="background: green;"/>
<vbox height="150" width="200" style="background: blue;"/>
<label value="a"/>
</vbox>
</scrollbox>
</window>