Summary: Implements the math-style property which indicates whether MathML equations should render with normal or compact height (this is similar to TeX's \displaystyle concept). This is already possible with the MathML's displaystyle attribute but exposing the magic to CSS provides more flexibility to users. This is already implemented as an internal -moz-math-display property, so we essentially just need to rename and expose it.
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1665975 Standard: * https://mathml-refresh.github.io/mathml-core/#the-math-style-property * https://github.com/w3c/csswg-drafts/issues/5387 Platform coverage: All Preference: layout.css.math-style.enabled Devtools bug: N/A: no extra work is required for devtools. Other browsers: * Safari: considering ( https://bugs.webkit.org/show_bug.cgi?id=216702 ), the MathML displaystyle inheritance was implemented via an internal structure (when WebKit didn't support internal CSS property), this can be easily rewritten by implementing the CSS math-style property. * Chrome: shipped behind the MathMLCore flag (patch landed in https://chromium-review.googlesource.com/c/chromium/src/+/2100787 ) but the values must be fixed to match the spec. web-platform-tests: - Existing tests use Chromium's values and must be fixed to match the spec. - Most of the effects are specific to MathML layout and tested by https://w3c-test.org/mathml/ (displaystyle mapping to math-style and effect of displaystyle on MathML layout) - Tentative CSS tests are available in https://w3c-test.org/css/css-fonts/math-script-level-and-math-style but the interaction with the math-level/font-size won't be testable until we expose -moz-script-level too. Secure contexts: Like all other CSS selectors these are not restricted to secure contexts. Is this feature enabled by default in sandboxed iframes?: Yes -- Frédéric Wang _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
