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style: Implement the math-style property.
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
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2 changed files with 9 additions and 9 deletions
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@ -239,14 +239,14 @@ ${helpers.predefined_type(
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)}
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${helpers.single_keyword(
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"-moz-math-display",
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"inline block",
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"math-style",
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"normal compact",
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engines="gecko",
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gecko_constant_prefix="NS_MATHML_DISPLAYSTYLE",
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gecko_ffi_name="mMathDisplay",
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enabled_in="ua",
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spec="Internal (not web-exposed)",
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gecko_pref="layout.css.math-style.enabled",
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spec="https://mathml-refresh.github.io/mathml-core/#the-math-style-property",
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has_effect_on_gecko_scrollbars=False,
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animation_value_type="none",
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enabled_in="ua",
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)}
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${helpers.single_keyword(
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@ -819,14 +819,14 @@ impl ToComputedValue for specified::MozScriptLevel {
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type ComputedValue = MozScriptLevel;
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fn to_computed_value(&self, cx: &Context) -> i8 {
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use crate::properties::longhands::_moz_math_display::SpecifiedValue as DisplayValue;
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use crate::properties::longhands::math_style::SpecifiedValue as MathStyleValue;
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use std::{cmp, i8};
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let int = match *self {
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specified::MozScriptLevel::Auto => {
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let parent = cx.builder.get_parent_font().clone__moz_script_level() as i32;
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let display = cx.builder.get_parent_font().clone__moz_math_display();
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if display == DisplayValue::Inline {
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let style = cx.builder.get_parent_font().clone_math_style();
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if style == MathStyleValue::Compact {
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parent + 1
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} else {
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parent
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