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style: Implement the math-style property.

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This patch renames the internal -moz-math-display to math-style and
exposes it under the layout.css.math-style.enabled preference. The
initial value becomes "normal" but that does not affect the default
MathML behavior since the UA style sheet sets the math-style property
explicitly on <math> tags. WPT tests are updated to use the syntax
approved by the CSSWG.

Intent to prototype: https://groups.google.com/forum/#!msg/mozilla.dev.platform/1hQQ7ISudGo/_yLEckEeBQAJ

Differential Revision: https://phabricator.services.mozilla.com/D90731
This commit is contained in:
Frederic Wang 2020-09-23 13:04:48 +00:00 • committed by Emilio Cobos Álvarez
parent 74a46d96eb
commit ca03f4df6d
2 changed files with 9 additions and 9 deletions
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6
components/style/values/computed/font.rs
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@ -819,14 +819,14 @@ impl ToComputedValue for specified::MozScriptLevel {
type ComputedValue = MozScriptLevel;
fn to_computed_value(&self, cx: &Context) -> i8 {
use crate::properties::longhands::_moz_math_display::SpecifiedValue as DisplayValue;
use crate::properties::longhands::math_style::SpecifiedValue as MathStyleValue;
use std::{cmp, i8};
let int = match *self {
specified::MozScriptLevel::Auto => {
let parent = cx.builder.get_parent_font().clone__moz_script_level() as i32;
let display = cx.builder.get_parent_font().clone__moz_math_display();
if display == DisplayValue::Inline {
let style = cx.builder.get_parent_font().clone_math_style();
if style == MathStyleValue::Compact {
parent + 1
} else {
parent