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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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101
layout/reftests/layers/pull-background-3.html Normal file
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<!DOCTYPE html>
<html lang="en" class="reftest-wait">
<meta charset="utf-8">
<title>Scrollboxes with non-uniform backgrounds should prevent their contents from pulling background colors, even if those contents start out above uniform backgrounds</title>
<style>
div {
min-height: 50px;
box-model: border-box;
}
.first, .second {
border: 1px solid blue;
margin: 50px 0;
}
.border {
border: 1px solid black;
}
.underlap {
border: 1px solid #088;
margin-left: 120px;
width: 80px;
margin-bottom: -30px;
}
.scrollable {
height: auto;
overflow: auto;
}
.scrollarea {
width: 5000px;
border: none;
padding: 10px 0 20px;
height: auto;
}
.scrolled {
margin-left: 220px;
width: 100px;
height: 100px;
border-color: red;
}
body {
margin: 0;
padding: 0 100px;
height: 3000px;
}
</style>
<div class="first" reftest-assigned-layer="page-background">
<!--
This is just a regular box, it should end up in the page background layer.
-->
</div>
<div class="underlap">
<!--
This item intersects with the scrollable box and is positioned below
.scrollable, in z-order.
-->
</div>
<div class="scrollable border">
<div class="scrollarea">
<div class="scrolled border reftest-no-paint">
<!--
This box starts out above solid white background, but it will move so
that it intersects .underlap, so it shouldn't pull up a background
color to begin with so that it doesn't need to invalidate.
-->
</div>
</div>
</div>
<div class="second" reftest-assigned-layer="page-background">
<!--
This should share a layer with .first and the page background.
-->
</div>
<script>
var scrollable = document.querySelector(".scrollable");
function doTest() {
scrollable.scrollLeft = 100;
document.documentElement.removeAttribute("class");
}
// Make .scrollable start out with active scrolling.
scrollable.scrollLeft = 0;
scrollable.scrollLeft = 10;
document.addEventListener("MozReftestInvalidate", doTest, false);
</script>