blob: 3e51420e6d6d1b7faaec7f8ccfbe923ad20b9ff3 [file] [log] [blame]
<!-- Based on fast/repaint/position-change-keeping-geometry.html -->
<!DOCTYPE html>
<script src="resources/paint-invalidation-test.js"></script>
<script>
function changePositionKeepingGeometry(id, newPosition) {
var target = document.getElementById(id);
var originalTop = target.offsetTop;
var originalLeft = target.offsetLeft;
target.style.position = newPosition;
target.style.top = originalTop + 'px';
target.style.left = originalLeft + 'px';
}
function paintInvalidationTest()
{
changePositionKeepingGeometry('target1', 'absolute');
changePositionKeepingGeometry('target2', 'absolute');
changePositionKeepingGeometry('target3', 'fixed');
}
onload = runPaintInvalidationTest;
</script>
<style>
body {
margin: 0;
}
div {
width: 100px;
height: 100px;
top: 20px;
background-color: blue;
}
#target0 {
left: 20px;
position: relative;
}
#target1 {
left: 20px;
position: relative;
}
#target2 {
left: 220px;
position: fixed;
z-index: 0;
}
#target3 {
left: 420px;
position: absolute;
z-index: 0;
}
</style>
There should be no invalildations on change of position without actual change of position and size.
<!-- target0 ensures we don't strip anonymous wrappers (and trigger a layout) when the other elements change position. -->
<div id="target0"></div>
<div id="target1"></div>
<div id="target2"></div>
<div id="target3"></div>