From 372b3a9081eb4aefc2175d637f7a1190a0016390 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 2 Apr 2021 22:41:52 +0100
Subject: [PATCH] movehist: Provide move len in update

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/movehist.rs     | 13 ++++++++-----
 templates/script.ts |  1 +
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/movehist.rs b/src/movehist.rs
index f8f077e1..75e2c7cd 100644
--- a/src/movehist.rs
+++ b/src/movehist.rs
@@ -38,9 +38,9 @@ pub struct MoveHistEnt {
   pub diff: MoveHistDiffToShow,
 }
 
-#[derive(Debug,Copy,Clone,Serialize,Deserialize,Eq,PartialEq)]
+#[derive(Debug,Copy,Clone,Serialize,Deserialize)]
 pub enum MoveHistDiffToShow {
-  Moved,
+  Moved { d: f64 },
 }
 
 #[derive(Debug,Clone,Serialize,Deserialize)]
@@ -72,9 +72,12 @@ impl MoveHistPosx {
                            -> Option<MoveHistDiffToShow> {
     use MoveHistDiffToShow as D;
 
-    match (|| Ok::<_,CoordinateOverflow> (
-      (self.pos - other.pos)?.len2()? > MOVEHIST_MIN_DIST*MOVEHIST_MIN_DIST
-    ))() { Ok(false) => {}, _ => return Some(D::Moved), }
+    match (|| Ok::<_,CoordinateOverflow> ({
+      (self.pos - other.pos)?.len()?
+    }))() {
+      Ok(d) if d >= MOVEHIST_MIN_DIST as f64 => return Some(D::Moved{ d }),
+      _ => {},
+    }
 
     None
   }
diff --git a/templates/script.ts b/templates/script.ts
index 7694abf8..aa52aab1 100644
--- a/templates/script.ts
+++ b/templates/script.ts
@@ -984,6 +984,7 @@ messages.SetLinks = <MessageHandler>function
 type MoveHistEnt = {
   held: PlayerId,
   posx: [MoveHistPosx, MoveHistPosx],
+  diff: { 'Moved': { d: number } },
 }
 type MoveHistPosx = {
   pos: Pos,
-- 
2.30.2