forked from mirrors/gecko-dev
41f5deb644
Automatic update from web-platform-tests [LayoutNG] Disable first-tier OOF-cache when borders/scrollbars are present. The first-tier OOF-cache attempts to skip all the OOF sizing and positioning work required, as the other cache simply compares the constraint spaces which can be (relatively) expensive to determine. This first-tier cache works by comparing the available-size given to the OOF-positioned descendant. If equal we can skip the OOF-positioned sizing and positioning steps. This mostly worked, however had an issue where the containing-block may have added/removed a borders/scrollbars, but the available-size given remained the same. This resulted in an incorrectly positioned OOF-positioned node. This fix disallows the first-tier cache when borders/scrollbars are present. This is sufficiently rare that this cache still has a relatively high hit-rate and is still relative cheap to calculate. Bug: 1013866 Change-Id: I71d41d2c4b47bcff6412f395db2deabf2f6f3a8f Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1891768 Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org> Reviewed-by: Aleks Totic <atotic@chromium.org> Reviewed-by: Morten Stenshorne <mstensho@chromium.org> Cr-Commit-Position: refs/heads/master@{#714394} -- wpt-commits: 87f0b7482549a035c7bd682f506f6bd88f569b60 wpt-pr: 20021
14 lines
797 B
HTML
14 lines
797 B
HTML
<!DOCTYPE html>
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<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
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<link rel="help" href="https://www.w3.org/TR/css-position-3/" />
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<meta name="assert" content="This test checks that a dynamic change padding-box location, but no change in available-size positions correctly an absolute child correctly."/>
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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="target" style="position: relative; background: red; margin: 25px; width: 50px; height: 50px;">
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<div style="position: absolute; top: 0; left: 0; width: 50px; height: 50px; background: green;"></div>
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</div>
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<script>
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document.body.offsetTop;
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const target = document.getElementById('target');
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target.style.border = '25px solid green';
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target.style.margin = '0';
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</script>
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