1 files changed, 32 insertions, 10 deletions
diff --git a/script.it/worker.ml b/script.it/worker.ml
index 00e4595..898df39 100755
--- a/script.it/worker.ml
+++ b/script.it/worker.ml
@@ -1,21 +1,43 @@
 open Js_of_ocaml
 
+let (let=?) : 'a option -> ('a -> unit) -> unit
+  = fun f opt -> Option.iter opt f
+
 let post_message
   : Worker_messages.from_worker -> unit
   = Worker.post_message
 
 let execute (command: [> Worker_messages.to_worker]) =
   match command with
-  | `Complete path ->
-    begin match Path.Fixed.rebuild path with
-      | Some path -> Worker.post_message (`Complete path)
-      | None -> ()
-    end
-  | `DeletePoint (point, path) ->
-    begin match Path.Fixed.remove_point path point with
-      | Some path ->  Worker.post_message (`Complete path)
-      | None -> ()
-    end
+
+  (* Full rebuild, evaluate the whole path *)
+  | `Complete outline ->
+    let path = outline.Outline.path in
+
+    let=? path = Path.Fixed.rebuild path in
+    let back = Path.Fixed.map
+        path
+        (fun pt -> Path.Point.copy pt @@ Path.Point.get_coord' pt) in
+    let=? back = Path.Fixed.rebuild back in
+    Worker.post_message (`Complete {outline with path; back})
+
+  (* Remove the point from the main line, and reevaluate the whole path *)
+  | `DeletePoint (point, outline) ->
+    let=? path = Path.Fixed.remove_point outline.Outline.path point in
+    let back = Path.Fixed.map
+        path
+        (fun pt -> Path.Point.copy pt @@ Path.Point.get_coord' pt) in
+    let=? back = Path.Fixed.rebuild back in
+    Worker.post_message (`Complete {outline with path; back})
+
+  (* Only evaluate the interior *)
+  | `Back outline ->
+    let back = Path.Fixed.map
+        outline.Outline.path
+        (fun pt -> Path.Point.copy pt @@ Path.Point.get_coord' pt) in
+    let=? back = Path.Fixed.rebuild back in
+    Worker.post_message (`Complete {outline with back})
+
   | _ ->
     post_message (`Other (Js.string "Unknown message received"))