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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>CSS Regions: document.elementFromPoint() for elements in a region's scroll overflow</title>
<link rel="author" title="Mihai Balan" href="mailto:mibalan@adobe.com">
<link rel="help" href="http://www.w3.org/TR/css3-regions/#the-flow-into-property">
<link rel="help" href="http://www.w3.org/TR/css3-regions/#flow-from">
<meta name="assert" content="For regions that have scroll overflow, scrolling an element flowed in them into view and then calling document.elementFromPoint() on the visible location of the element should return the element">
<meta name="flags" content="dom interact">
<style>
p {
margin: 0;
}
input {
width: 100px;
}
#content {
font-family: monospace;
font-size: 20px;
line-height: 1em;
flow-into: f;
}
.spacer {
width: 100%;
height: 80px;
display: block;
}
.highlite {
color: deepskyblue;
display: inline-block;
height: 50px;
xbackground-color: yellow;
}
#parent {
height: 200px;
}
#region {
border: 2px solid black;
background-color: lightgray;
width: 100px;
height: 100px;
flow-from: f;
overflow-y: scroll;
}
#region p {
background-color: red;
width: 100%;
height: 50%;
}
#result {
color: green;
font-weight: bold;
}
</style>
</head>
<body>
This tests that calling <code>document.elementFromPoint()</code> on an element displayed in a region's
visible overflow will actually return that element (and not the element "underneath" it).<br>
You should see "PASS" being displayed below.
<div id="content"><span class="spacer"></span>This text has <span class="highlite">overflow</span></div>
<div id="result"> </div>
<div id="parent">
<div id="region">
<p></p>
</div>
</div>
<script type="text/javascript">
if (window.testRunner) {
testRunner.waitUntilDone();
testRunner.dumpAsText();
}
function runScript() {
var region, regionBox, target, targetBox, fromPoint;
region = document.querySelector("#region");
region.scrollTop = 200;
regionBox = region.getBoundingClientRect();
document.body.offsetTop;
target = document.querySelector(".highlite");
targetBox = target.getBoundingClientRect();
fromPoint = document.elementFromPoint(targetBox.left + targetBox.width/2, targetBox.top + targetBox.height/2);
// Check we get the same element via DOM selection and via elementFromPoint() AND
// the element we get is in the visible part of the region
if ((fromPoint == target) && (targetBox.bottom <= regionBox.bottom)) {
result.innerHTML = "PASS";
} else {
result.innerHTML = "FAIL";
result.style.color = "red";
}
if (window.testRunner) {
testRunner.notifyDone();
}
}
document.addEventListener("DOMContentLoaded", runScript);
</script>
</body>
</html>
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