1837590 - [wpt-sync] Sync PR 40471 - Layout 2020: Properly handle negative block margins in floats

Status: RESOLVED FIXED

(Core :: CSS Parsing and Computation, task, P4)

Description

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Sync web-platform-tests PR 40471 into mozilla-central (this bug is closed when the sync is complete).

PR: https://github.com/web-platform-tests/wpt/pull/40471
Details from upstream follow.

Martin Robinson <[e-mail]> wrote:

Layout 2020: Properly handle negative block margins in floats

If a float has negative block margins, it should be pushed upward, but shouldn't affect the positioning of any floats that came before it. It should lower the ceiling though when it still has some non-negative block contribution. In order to implement this behavior, we should only place the float considering its non-negative block length contribution. If the float is pushed up completely past it's "natural" position, it should be placed like a float with zero block size.

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Reviewed in servo/servo#29859

Comment 1

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Pushed to try (stability) https://treeherder.mozilla.org/#/jobs?repo=try&revision=9cec162e826030d333b63db8e00bdae761652dc6

Comment 2

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Test result changes from PR not available.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/f7b063d490f6
[wpt PR 40471] - Layout 2020: Properly handle negative margins in floats, a=testonly

Comment 4

[Web Platform Test Sync Bot [:wpt-sync] (Matrix: #interop:mozilla.org)]

Test result changes from PR not available.

Comment 5

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/f7b063d490f6