commit | cd43852385dd20211c3d372b6a2b51564c8533ae | [log] [tgz] |
---|---|---|
author | Frédéric Wang <fwang@igalia.com> | Wed Aug 31 06:59:51 2022 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Wed Aug 31 07:29:53 2022 |
tree | 52ccc6be848bf77278a061b713da0a82dcd51d92 | |
parent | 7f6c6167641fba37b477a620569a346bc52538ce [diff] |
[mathml] Fix MathML layout algorithms for empty children with negative margins This CL adds two WPT crashtests for the edge cases of MathML elements having empty children with negative margins, testing separately the inline and block cases: mathml/crashtests/children-with-negative-inline-sizes.html mathml/crashtests/children-with-negative-block-sizes.html The former almost works without problem, but it's currently failing the assertion that min size is at most the max size for the <mroot> element. This is due to a mistake in the min/max calculation and is fixed by aligning with the MathML Core spec [1]. This also makes existing mathml/presentation-markup/mrow/no-spacing.html test pass. The latter is failing the assertion that block intrinsic size includes at least the border/padding, for the algorithms related to fraction and scripted elements. This is because the calculated ascent/descent of the content boxes can be negative for the empty children with negative margins. This is fixed by clamping the calculated ascent/descent to 0 before adding the element's own border/padding. For that purpose, a bit of code refactoring is also done here. [1] https://w3c.github.io/mathml-core/#root-with-index Bug: 1342307 Change-Id: I00db8d423f163c14cc2ef34dcccde8a3a086e036 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3858293 Commit-Queue: Frédéric Wang <fwang@igalia.com> Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org> Cr-Commit-Position: refs/heads/main@{#1041390}
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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