From cb1fb40a0417fa7f0adbdd5fc75eed7bf7d964ee Mon Sep 17 00:00:00 2001
From: ThetaDev <t.testboy@gmail.com>
Date: Mon, 13 Mar 2023 15:39:08 +0100
Subject: [PATCH 1/2] feat: add change difference

---
 rust/automerge/src/change.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/rust/automerge/src/change.rs b/rust/automerge/src/change.rs
index b5cae7df..e8761148 100644
--- a/rust/automerge/src/change.rs
+++ b/rust/automerge/src/change.rs
@@ -112,6 +112,17 @@ impl Change {
         self.stored.iter_ops()
     }
 
+    pub fn difference(&self) -> (u32, u32) {
+        self.iter_ops()
+            .map(|op| match op.action {
+                1 => (1, 0),
+                3 => (0, 1),
+                _ => (0, 0),
+            })
+            .reduce(|acc, x| (acc.0 + x.0, acc.1 + x.1))
+            .unwrap_or_default()
+    }
+
     pub fn extra_bytes(&self) -> &[u8] {
         self.stored.extra_bytes()
     }

From e6e818443098182b98ebabb9f06a2c2bf833c2a0 Mon Sep 17 00:00:00 2001
From: ThetaDev <t.testboy@gmail.com>
Date: Mon, 13 Mar 2023 18:43:56 +0100
Subject: [PATCH 2/2] feat: add mark_saved

---
 rust/automerge/src/automerge.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/rust/automerge/src/automerge.rs b/rust/automerge/src/automerge.rs
index 86aa5f63..cd7c0b98 100644
--- a/rust/automerge/src/automerge.rs
+++ b/rust/automerge/src/automerge.rs
@@ -698,6 +698,11 @@ impl Automerge {
         bytes
     }
 
+    /// Mark the document as saved
+    pub fn mark_saved(&mut self) {
+        self.saved = self.get_heads();
+    }
+
     /// Save the changes since the last call to [Self::save`]
     ///
     /// The output of this will not be a compressed document format, but a series of individual