commit | 7460ac895c551dcc9e7b653145a297177fbe92b4 | [log] [tgz] |
---|---|---|
author | Alison Maher <almaher@microsoft.com> | Thu Aug 19 23:07:49 2021 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Fri Aug 20 10:41:26 2021 |
tree | 8444aaffb0f6dda579c55d697363b7589fabb974 | |
parent | d97a9fc1e67d00eb5a2725f661df203395dd9ccb [diff] |
[LayoutNG] Unsplittable scrolling overflow in LayoutNG According to the spec "UAs may consider as monolithic any elements with overflow set to auto or scroll and any elements with overflow: hidden and a non-auto logical height (and no specified maximum logical height)." https://www.w3.org/TR/css-break-3/#possible-breaks We previously did not treat any element with 'overflow: hidden' as monolithic. We also would allow elements with an overflow of auto or scroll to break if the block had auto logical height, auto or undefined max-logical-height and a zero or auto min-logical-height. This CL updates this logic to treat any element with overflow auto, scroll, or hidden as monolithic (unless we're printing). And this logic is updated specifically for LayoutNG. In legacy layout, this would not have worked because even if an element is treated as monolithic, it can still get chopped off if it did not fit within the fragmentainer. The new behavior is compatible with Firefox. The existing non-WPT tests that are no longer relevant as a result of the updated behavior have been deleted: fast/multicol/composited-relpos-clipped.html fast/multicol/composited-relpos-in-clipped.html fast/multicol/overflow-across-columns.html One WPT test was updated to use 'overflow: clip' instead of 'overflow: hidden' to maintain the test's current behavior: external/wpt/css/css-multicol/multicol-width-small-001.xht Three WPT tests were added to test the new functionality, and two new crashing WPT tests were added that are fixed by this CL. Bug: 1240384, 829028 Change-Id: I64b891662a2004c8da2cc20d6a0169d1a58b64c8 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3103651 Reviewed-by: Morten Stenshorne <mstensho@chromium.org> Commit-Queue: Alison Maher <almaher@microsoft.com> Cr-Commit-Position: refs/heads/main@{#913518}
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
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wpt:matrix.org
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Clone or otherwise get https://github.com/web-platform-tests/wpt.
Note: because of the frequent creation and deletion of branches in this repo, it is recommended to “prune” stale branches when fetching updates, i.e. use git pull --prune
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).
See the documentation website and in particular the system setup for running tests locally.
The wpt
command provides a frontend to a variety of tools for working with and running web-platform-tests. Some of the most useful commands are:
wpt serve
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test manifestwpt install
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is not in your %PATH%
).
python wpt [command]
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../wpt lint
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