From 4b973885a3d16c007e99d0f51ea0f507b64b276f Mon Sep 17 00:00:00 2001
From: Oriol Brufau <obrufau@igalia.com>
Date: Tue, 16 May 2023 22:56:28 +0200
Subject: [PATCH] style: Add the size-adjust descriptor to the style system

Differential Revision: https://phabricator.services.mozilla.com/D110022
---
 components/style/font_face.rs                   | 8 +++++++-
 components/style/values/specified/percentage.rs | 8 ++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/components/style/font_face.rs b/components/style/font_face.rs
index 901bafe5101..f7c95c10323 100644
--- a/components/style/font_face.rs
+++ b/components/style/font_face.rs
@@ -23,7 +23,7 @@ use crate::values::specified::font::{AbsoluteFontWeight, FontStretch};
 #[cfg(feature = "gecko")]
 use crate::values::specified::font::MetricsOverride;
 use crate::values::specified::url::SpecifiedUrl;
-use crate::values::specified::Angle;
+use crate::values::specified::{Angle, NonNegativePercentage};
 #[cfg(feature = "gecko")]
 use cssparser::UnicodeRange;
 use cssparser::{AtRuleParser, DeclarationListParser, DeclarationParser, Parser};
@@ -429,6 +429,9 @@ macro_rules! is_descriptor_enabled {
     ("line-gap-override") => {
         static_prefs::pref!("layout.css.font-metrics-overrides.enabled")
     };
+    ("size-adjust") => {
+        static_prefs::pref!("layout.css.size-adjust.enabled")
+    };
     ($name:tt) => {
         true
     };
@@ -596,6 +599,9 @@ font_face_descriptors! {
 
         /// The line-gap override for this font face.
         "line-gap-override" line_gap_override / mLineGapOverride: MetricsOverride,
+
+        /// The size adjustment for this font face.
+        "size-adjust" size_adjust / mSizeAdjust: NonNegativePercentage,
     ]
 }
 
diff --git a/components/style/values/specified/percentage.rs b/components/style/values/specified/percentage.rs
index c73616a3848..a152f7d8dc0 100644
--- a/components/style/values/specified/percentage.rs
+++ b/components/style/values/specified/percentage.rs
@@ -186,3 +186,11 @@ impl Parse for NonNegativePercentage {
         Ok(NonNegative(Percentage::parse_non_negative(context, input)?))
     }
 }
+
+impl NonNegativePercentage {
+    /// Convert to ComputedPercentage, for FontFaceRule size-adjust getter.
+    #[inline]
+    pub fn compute(&self) -> ComputedPercentage {
+        ComputedPercentage(self.0.get())
+    }
+}