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Re: [csswg-drafts] @font-face overrides for superscript/subscript metrics (#5518)

From: fantasai via GitHub <sysbot+gh@w3.org>
Date: Thu, 24 Sep 2020 00:14:46 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-698037270-1600906486-sysbot+gh@w3.org>
@litherum Wrt hardcoded formulas, I think what would make sense is if the descriptor is supported, then the UA MUST use that value (instead of the hardcoded value or the value in the font that it would otherwise have used). If the descriptor is not supported, then obviously that requirement doesn't apply. "Supporting" the descriptor and not honoring it for vertical-align makes no sense.

Wrt naming, I wanted to be consistent with the CSS property `baseline-shift` (whose name we inherited from XSL:FO via SVG and can't change). The `font-variant-position` property encompasses both sizing and shifting operations--and of course position has other meanings as well in CSS--so I don't think it's a better fit.

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