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Improve margin collapse in layout-2020

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According to https://drafts.csswg.org/css2/#collapsing-margins, bottom
margins should only collapse with the last child if `height` is `auto`.
Also, the note mentions `min-height: 0`, but the normative text doesn't
have such requirement, so I'm dropping it, matching WebKit.

The previous logic is moved into the case of collapsing the top and
bottom margins of the same element, since this can happen either with
`height: auto` or `height: 0`, and requires `min-height: 0`.
This commit is contained in:
Oriol Brufau 2023-06-08 09:11:48 +02:00
parent 1bd1441d0b
commit 5e1f059de2
3 changed files with 6 additions and 9 deletions
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2
tests/wpt/metadata-layout-2020/css/CSS2/margin-padding-clear/margin-collapse-025.xht.ini
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@ -1,2 +0,0 @@
[margin-collapse-025.xht]
expected: FAIL

2
tests/wpt/metadata-layout-2020/css/CSS2/margin-padding-clear/margin-collapse-037.xht.ini
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@ -1,2 +0,0 @@
[margin-collapse-037.xht]
expected: FAIL