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Automatic update from web-platform-tests[css-contain] Layout containment abspos and fixed descendants An element with "contain: layout" should be the containing block of any absolutely or fixed positioned descendants. The spec is very clear regarding this (https://drafts.csswg.org/css-contain/#containment-layout): "The element acts as a containing block for absolutely positioned and fixed positioned descendants." The patch just adds a new condition to ComputedStyle::CanContainFixedPositionObjects(). We already had the condition for paint containment before, so this takes advantage to add WPT tests to verify that case too. This patch causes that contain-layout-005.html starts to fail, but that's because of crbug.com/843329. There are more failing tests related to that bug, so TestExpectations is modified to reference it. BUG=785212 TEST=external/wpt/css/css-contain/contain-layout-006.html TEST=external/wpt/css/css-contain/contain-layout-007.html Change-Id: I8bb1d637bd7742961a414a5007b8ee8a8d3e66ea Reviewed-on: https://chromium-review.googlesource.com/1059557 Reviewed-by: Morten Stenshorne <mstensho@chromium.org> Commit-Queue: Manuel Rego Casasnovas <rego@igalia.com> Cr-Commit-Position: refs/heads/master@{#559045} -- wpt-commits: 90f40cbe8452a84496c3e83bbba5b1de3f26455f wpt-pr: 11026
28 lines
861 B
HTML
28 lines
861 B
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>CSS Containment Test: Layout containment absolutely positioned descendants</title>
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<link rel="author" title="Manuel Rego Casasnovas" href="mailto:rego@igalia.com">
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<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-layout">
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<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
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<meta name=assert content="Layout containment makes an element to act as containing block for absolutely positioned descendants.">
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<style>
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#contain-layout {
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contain: layout;
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width: 100px;
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height: 100px;
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background: red;
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}
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#abspos {
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position: absolute;
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bottom: 0;
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right: 0;
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background: green;
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width: 100px;
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height: 100px;
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}
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</style>
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<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
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<div id="contain-layout">
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<div id="abspos"></div>
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</div>
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