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110 lines
2.3 KiB
HTML
110 lines
2.3 KiB
HTML
<!DOCTYPE html>
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<html lang="en" class="reftest-wait"
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reftest-displayport-x="0"
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reftest-displayport-y="0"
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reftest-displayport-w="800"
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reftest-displayport-h="1000">
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<meta charset="utf-8">
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<title>Things overlapping active scrollboxes should be in a layer on top of the scrolled contents.</title>
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<style>
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div {
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height: 50px;
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border: 1px solid;
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box-model: border-box;
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}
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.first, .second {
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border-color: blue;
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margin: 50px 0;
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}
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.overlap {
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border-color: #088;
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margin-left: 100px;
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width: 80px;
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margin-bottom: -30px;
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position: relative;
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}
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.scrollable {
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height: auto;
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overflow: auto;
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}
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.scrollarea {
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width: 5000px;
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border: none;
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padding: 10px 0 20px;
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height: auto;
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}
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.scrolled {
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margin-left: 220px;
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width: 100px;
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height: 100px;
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border-color: red;
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}
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body {
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margin: 0;
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padding: 0 100px;
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height: 3000px;
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}
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</style>
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<div class="first" reftest-assigned-layer="page-background">
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<!--
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This is just a regular box, it should end up in the page background layer.
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-->
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</div>
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<div class="overlap reftest-no-paint">
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<!--
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This item intersects with the scrollable box and is positioned above
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.scrolled, in z-order, so it should be split into its own layer as soon
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as the scrollbox gets active scrolling. The splitting should not wait for
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.scrolled to move under .overlap.
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-->
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</div>
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<div class="scrollable">
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<div class="scrollarea">
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<div class="scrolled reftest-opaque-layer">
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<!--
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This will move under .overlap by .scrollable being scrolled. This
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action should not invalidate .overlap.
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Furthermore, since the background of .scrollable is uniform and opaque,
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.scrolled should be able to pull up that background color and become
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opaque itself.
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-->
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</div>
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</div>
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</div>
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<div class="second" reftest-assigned-layer="page-background">
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<!--
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This should share a layer with .first and the page background.
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-->
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</div>
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<script>
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var scrollable = document.querySelector(".scrollable");
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function doTest() {
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scrollable.scrollLeft = 100;
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document.documentElement.removeAttribute("class");
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}
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// Make .scrollable start out with active scrolling.
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scrollable.scrollLeft = 0;
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scrollable.scrollLeft = 20;
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document.addEventListener("MozReftestInvalidate", doTest);
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</script>
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