revert the references

src/attrs.rs

@@ -169,13 +169,7 @@ pub struct FontFeatures {
 impl FontFeatures {
     /// Create new font features with default settings
     pub fn new() -> Self {
-        let mut features = Vec::new();
+        Self { features: Vec::new() }
-        // Enable kerning by default
-        features.push(Feature { tag: FeatureTag::KERNING, value: 1 });
-        // Enable standard ligatures by default
-        features.push(Feature { tag: FeatureTag::STANDARD_LIGATURES, value: 1 });
-        
-        Self { features }
     }
 
     /// Set a feature value
@@ -207,7 +201,7 @@ pub struct Attrs<'a> {
     pub metadata: usize,
     pub cache_key_flags: CacheKeyFlags,
     pub metrics_opt: Option<CacheMetrics>,
-    pub font_features: Option<FontFeatures>,
+    pub font_features: FontFeatures,
 }
 
 impl<'a> Attrs<'a> {
@@ -224,7 +218,7 @@ impl<'a> Attrs<'a> {
             metadata: 0,
             cache_key_flags: CacheKeyFlags::empty(),
             metrics_opt: None,
-            font_features: None,  // Use default features
+            font_features: FontFeatures::new(),
         }
     }
 
@@ -278,7 +272,7 @@ impl<'a> Attrs<'a> {
 
     /// Set [FontFeatures]
     pub fn font_features(mut self, font_features: FontFeatures) -> Self {
-        self.font_features = Some(font_features);
+        self.font_features = font_features;
         self
     }
 
@@ -330,7 +324,7 @@ pub struct AttrsOwned {
     pub metadata: usize,
     pub cache_key_flags: CacheKeyFlags,
     pub metrics_opt: Option<CacheMetrics>,
-    pub font_features: Option<FontFeatures>,
+    pub font_features: FontFeatures,
 }
 
 impl AttrsOwned {
@@ -373,9 +367,9 @@ pub struct AttrsList {
 
 impl AttrsList {
     /// Create a new attributes list with a set of default [Attrs]
-    pub fn new(defaults: &Attrs) -> Self {
+    pub fn new(defaults: Attrs) -> Self {
         Self {
-            defaults: AttrsOwned::new(defaults.clone()),
+            defaults: AttrsOwned::new(defaults),
             spans: RangeMap::new(),
         }
     }
@@ -401,13 +395,13 @@ impl AttrsList {
     }
 
     /// Add an attribute span, removes any previous matching parts of spans
-    pub fn add_span(&mut self, range: Range<usize>, attrs: &Attrs) {
+    pub fn add_span(&mut self, range: Range<usize>, attrs: Attrs) {
         //do not support 1..1 or 2..1 even if by accident.
         if range.is_empty() {
             return;
         }
 
-        self.spans.insert(range, AttrsOwned::new(attrs.clone()));
+        self.spans.insert(range, AttrsOwned::new(attrs));
     }
 
     /// Get the attribute span for an index
@@ -457,8 +451,8 @@ impl AttrsList {
     }
 
     /// Resets the attributes with new defaults.
-    pub(crate) fn reset(mut self, default: &Attrs) -> Self {
+    pub(crate) fn reset(mut self, default: Attrs) -> Self {
-        self.defaults = AttrsOwned::new(default.clone());
+        self.defaults = AttrsOwned::new(default);
         self.spans.clear();
         self
     }

src/shape.rs

@@ -141,25 +141,23 @@ fn shape_fallback(
     assert_eq!(rtl, span_rtl);
 
     let attrs = attrs_list.get_span(start_run);
-    let mut rb_features = Vec::new();
+    let mut rb_font_features = Vec::new();
 
     // Convert attrs::Feature to rustybuzz::Feature
-    if let Some(font_features) = attrs.font_features {
+    for feature in attrs.font_features.features {
-        for feature in font_features.features {
+        rb_font_features.push(rustybuzz::Feature::new(
-            rb_features.push(rustybuzz::Feature::new(
+            rustybuzz::ttf_parser::Tag::from_bytes(&feature.tag.as_bytes()),
-                rustybuzz::ttf_parser::Tag::from_bytes(&feature.tag.as_bytes()),
+            feature.value,
-                feature.value,
+            0..usize::MAX,
-                0..usize::MAX,
+        ));
-            ));
+    }
-        }
-    };
 
     let shape_plan = rustybuzz::ShapePlan::new(
         font.rustybuzz(),
         buffer.direction(),
         Some(buffer.script()),
         buffer.language().as_ref(),
-        &rb_features,
+        &rb_font_features,
     );
     let glyph_buffer = rustybuzz::shape_with_plan(font.rustybuzz(), &shape_plan, buffer);
     let glyph_infos = glyph_buffer.glyph_infos();
@@ -262,7 +260,7 @@ fn shape_run(
 
     let attrs = attrs_list.get_span(start_run);
 
-    let fonts = font_system.get_font_matches(&attrs);
+    let fonts = font_system.get_font_matches(attrs);
 
     let default_families = [&attrs.family];
     let mut font_iter = FontFallbackIter::new(
@@ -445,7 +443,7 @@ fn shape_skip(
     end_run: usize,
 ) {
     let attrs = attrs_list.get_span(start_run);
-    let fonts = font_system.get_font_matches(&attrs);
+    let fonts = font_system.get_font_matches(attrs);
 
     let default_families = [&attrs.family];
     let mut font_iter = FontFallbackIter::new(font_system, &fonts, &default_families, &[], "");