WIP: Avoid converting RopeFingerprint into a string

Co-Authored-By: Petros Amoiridis <petros@zed.dev>

crates/rope/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 path = "src/rope.rs"
 
 [dependencies]
-bromberg_sl2 = "0.6"
+bromberg_sl2 = { git = "https://github.com/zed-industries/bromberg_sl2", rev = "dac565a90e8f9245f48ff46225c915dc50f76920" }
 smallvec = { version = "1.6", features = ["union"] }
 sum_tree = { path = "../sum_tree" }
 arrayvec = "0.7.1"

crates/rope/src/rope.rs

@@ -4,7 +4,7 @@ mod point_utf16;
 mod unclipped;
 
 use arrayvec::ArrayString;
-use bromberg_sl2::{DigestString, HashMatrix};
+use bromberg_sl2::HashMatrix;
 use smallvec::SmallVec;
 use std::{
     cmp, fmt, io, mem,
@@ -25,6 +25,8 @@ const CHUNK_BASE: usize = 6;
 #[cfg(not(test))]
 const CHUNK_BASE: usize = 16;
 
+pub type RopeFingerprint = HashMatrix;
+
 #[derive(Clone, Default, Debug)]
 pub struct Rope {
     chunks: SumTree<Chunk>,
@@ -361,8 +363,8 @@ impl Rope {
             .column
     }
 
-    pub fn fingerprint(&self) -> String {
-        self.chunks.summary().fingerprint.to_hex()
+    pub fn fingerprint(&self) -> RopeFingerprint {
+        self.chunks.summary().fingerprint
     }
 }