1 files changed, 25 insertions, 1 deletions
diff --git a/components/style/stylist.rs b/components/style/stylist.rs
index 487f3ade5de..8dfdc91e58b 100644
--- a/components/style/stylist.rs
+++ b/components/style/stylist.rs
@@ -32,7 +32,9 @@ use crate::stylesheets::keyframes_rule::KeyframesAnimation;
 use crate::stylesheets::layer_rule::{LayerName, LayerOrder};
 use crate::stylesheets::viewport_rule::{self, MaybeNew, ViewportRule};
 #[cfg(feature = "gecko")]
-use crate::stylesheets::{CounterStyleRule, FontFaceRule, FontFeatureValuesRule, PageRule};
+use crate::stylesheets::{
+    CounterStyleRule, FontFaceRule, FontFeatureValuesRule, FontPaletteValuesRule, PageRule,
+};
 use crate::stylesheets::{
     CssRule, EffectiveRulesIterator, Origin, OriginSet, PageRule, PerOrigin, PerOriginIter,
 };
@@ -1679,6 +1681,10 @@ pub struct ExtraStyleData {
     #[cfg(feature = "gecko")]
     pub font_feature_values: LayerOrderedVec<Arc<Locked<FontFeatureValuesRule>>>,
 
+    /// A list of effective font-palette-values rules.
+    #[cfg(feature = "gecko")]
+    pub font_palette_values: LayerOrderedVec<Arc<Locked<FontPaletteValuesRule>>>,
+
     /// A map of effective counter-style rules.
     #[cfg(feature = "gecko")]
     pub counter_styles: LayerOrderedMap<Arc<Locked<CounterStyleRule>>>,
@@ -1704,6 +1710,15 @@ impl ExtraStyleData {
         self.font_feature_values.push(rule.clone(), layer);
     }
 
+    /// Add the given @font-palette-values rule.
+    fn add_font_palette_values(
+        &mut self,
+        rule: &Arc<Locked<FontPaletteValuesRule>>,
+        layer: LayerId,
+    ) {
+        self.font_palette_values.push(rule.clone(), layer);
+    }
+
     /// Add the given @counter-style rule.
     fn add_counter_style(
         &mut self,
@@ -1745,6 +1760,7 @@ impl ExtraStyleData {
     fn sort_by_layer(&mut self, layers: &[CascadeLayer]) {
         self.font_faces.sort(layers);
         self.font_feature_values.sort(layers);
+        self.font_palette_values.sort(layers);
         self.counter_styles.sort(layers);
         self.pages.global.sort(layers);
     }
@@ -1754,6 +1770,7 @@ impl ExtraStyleData {
         {
             self.font_faces.clear();
             self.font_feature_values.clear();
+            self.font_palette_values.clear();
             self.counter_styles.clear();
             self.pages.clear();
         }
@@ -1790,6 +1807,7 @@ impl MallocSizeOf for ExtraStyleData {
         let mut n = 0;
         n += self.font_faces.shallow_size_of(ops);
         n += self.font_feature_values.shallow_size_of(ops);
+        n += self.font_palette_values.shallow_size_of(ops);
         n += self.counter_styles.shallow_size_of(ops);
         n += self.pages.shallow_size_of(ops);
         n
@@ -2638,6 +2656,11 @@ impl CascadeData {
                         .add_font_feature_values(rule, containing_rule_state.layer_id);
                 },
                 #[cfg(feature = "gecko")]
+                CssRule::FontPaletteValues(ref rule) => {
+                    self.extra_data
+                        .add_font_palette_values(rule, containing_rule_state.layer_id);
+                },
+                #[cfg(feature = "gecko")]
                 CssRule::CounterStyle(ref rule) => {
                     self.extra_data.add_counter_style(
                         guard,
@@ -2888,6 +2911,7 @@ impl CascadeData {
                 CssRule::Document(..) |
                 CssRule::LayerBlock(..) |
                 CssRule::LayerStatement(..) |
+                CssRule::FontPaletteValues(..) |
                 CssRule::FontFeatureValues(..) => {
                     // Not affected by device changes.
                     continue;