Add Cluster::style getter

Signed-off-by: Nico Burns <nico@nicoburns.com>

parley/src/layout/cluster.rs

@@ -1,7 +1,7 @@
 // Copyright 2021 the Parley Authors
 // SPDX-License-Identifier: Apache-2.0 OR MIT
 
-use super::{BreakReason, Brush, Cluster, ClusterInfo, Glyph, Layout, Line, Range, Run};
+use super::{BreakReason, Brush, Cluster, ClusterInfo, Glyph, Layout, Line, Range, Run, Style};
 use swash::text::cluster::Whitespace;
 
 /// Defines the visual side of the cluster for hit testing.
@@ -101,6 +101,11 @@ impl<'a, B: Brush> Cluster<'a, B> {
         self.data.text_range(self.run.data)
     }
 
+    /// Returns the style that applies to the cluster.
+    pub fn style(&self) -> &Style<B> {
+        &self.run.layout.styles()[usize::from(self.data.style_index)]
+    }
+
     /// Returns the advance of the cluster.
     pub fn advance(&self) -> f32 {
         self.data.advance