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<!DOCTYPE HTML>
<body style="width:30000px;height:30000px" onload="runTest()">
</body>
<script src="../../resources/js-test.js"></script>
<script>
description("Verifies that document scrolling supports fractional offset.");
var floatPrecision = 0.00001;
var useIntegerScrollOffset = false;
function checkScrollOffset(offset_x, offset_y)
{
if (useIntegerScrollOffset) {
offset_x = Math.floor(offset_x);
offset_y = Math.floor(offset_y);
}
shouldBeCloseTo('document.scrollingElement.scrollTop', offset_y, floatPrecision);
shouldBeCloseTo('document.scrollingElement.scrollLeft', offset_x, floatPrecision);
}
function scroll()
{
window.scrollTo(0, 0);
eventSender.gestureScrollBegin(100.1, 300.2);
checkScrollOffset(0, 0);
eventSender.gestureScrollUpdate(-20.5, -10.2);
checkScrollOffset(20.5, 10.2);
eventSender.gestureScrollUpdate(10.9, -20.9);
checkScrollOffset(9.6, 31.1);
eventSender.gestureScrollUpdate(100.4, 220.9);
checkScrollOffset(0.0, 0.0);
eventSender.gestureScrollEnd(0, 0);
}
function runTest()
{
if (window.eventSender) {
debug("set PreferCompositingToLCDTextEnabled true");
window.internals.settings.setPreferCompositingToLCDTextEnabled(true);
scroll();
debug("set PreferCompositingToLCDTextEnabled false");
window.internals.settings.setPreferCompositingToLCDTextEnabled(false);
useIntegerScrollOffset = true;
scroll();
}
}
</script>
</html>
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