Treat NSTextInputClient ranges as UTF-16

crates/editor/src/multi_buffer/anchor.rs

@@ -1,10 +1,10 @@
-use super::{ExcerptId, MultiBufferSnapshot, ToOffset, ToPoint};
+use super::{ExcerptId, MultiBufferSnapshot, ToOffset, ToOffsetUtf16, ToPoint};
 use std::{
     cmp::Ordering,
     ops::{Range, Sub},
 };
 use sum_tree::Bias;
-use text::{rope::TextDimension, Point};
+use text::{rope::TextDimension, OffsetUtf16, Point};
 
 #[derive(Clone, Eq, PartialEq, Debug, Hash)]
 pub struct Anchor {
@@ -89,6 +89,12 @@ impl ToOffset for Anchor {
     }
 }
 
+impl ToOffsetUtf16 for Anchor {
+    fn to_offset_utf16(&self, snapshot: &MultiBufferSnapshot) -> OffsetUtf16 {
+        self.summary(snapshot)
+    }
+}
+
 impl ToPoint for Anchor {
     fn to_point<'a>(&self, snapshot: &MultiBufferSnapshot) -> Point {
         self.summary(snapshot)