only update search list if timestamp for search message is greater than the buffer's modified time

fcore/normal-mode/normal-finish.sml

@@ -49,14 +49,21 @@ struct
         )
     end
 
-  fun withSearchList (app: app_type, searchList) =
+  fun withSearchList (app: app_type, searchList, searchTime) =
     let
-      val {buffer, searchString, cursorIdx, bufferModifyTime, ...} = app
-      val app = NormalModeWith.searchList
-        (app, searchList, buffer, searchString, bufferModifyTime)
+      open Time
     in
-      buildTextAndClear
-        (app, buffer, cursorIdx, searchList, [], bufferModifyTime)
+      if searchTime >= #bufferModifyTime app then
+        let
+          val {buffer, searchString, cursorIdx, bufferModifyTime, ...} = app
+          val app = NormalModeWith.searchList
+            (app, searchList, buffer, searchString, bufferModifyTime)
+        in
+          buildTextAndClear
+            (app, buffer, cursorIdx, searchList, [], bufferModifyTime)
+        end
+      else
+        app
     end
 
   fun resizeText (app: app_type, newWidth, newHeight) =

fcore/normal-mode/normal-mode.sml

@@ -522,8 +522,8 @@ struct
     | KEY_ESC => NormalFinish.clearMode app
     | RESIZE_EVENT (width, height) =>
         NormalFinish.resizeText (app, width, height)
-    | WITH_SEARCH_LIST searchList =>
-        NormalFinish.withSearchList (app, searchList)
+    | WITH_SEARCH_LIST (searchList, time) =>
+        NormalFinish.withSearchList (app, searchList, time)
 
     (* Don't need to handle these keys in normal mode.
      * Everything that is possible through them in Vi and Vim

fcore/normal-mode/normal-search-mode.sml

@@ -141,8 +141,8 @@ struct
         moveLeft (app, searchString, tempSearchList, searchCursorIdx)
     | ARROW_RIGHT =>
         moveRight (app, searchString, tempSearchList, searchCursorIdx)
-    | WITH_SEARCH_LIST searchList =>
-        NormalSearchModeWith.searchList (app, searchList)
+    | WITH_SEARCH_LIST (searchList, time) =>
+        NormalFinish.withSearchList (app, searchList, time)
     | RESIZE_EVENT (width, height) =>
         NormalSearchFinish.resize
           (app, width, height, searchCursorIdx, tempSearchList)

message-types/input-msg.sml

@@ -6,7 +6,7 @@ struct
   | KEY_ENTER
   | KEY_BACKSPACE
   | RESIZE_EVENT of int * int
-  | WITH_SEARCH_LIST of int vector
+  | WITH_SEARCH_LIST of int vector * Time.time
   | ARROW_LEFT
   | ARROW_UP
   | ARROW_RIGHT

shell/search-thread.sml

@@ -7,7 +7,8 @@ struct
     let
       val (buffer, searchString, time) = Mailbox.recv searchMailbox
       val searchList = SearchList.build (buffer, searchString)
-      val () = Mailbox.send (inputMailbox, InputMsg.WITH_SEARCH_LIST searchList)
+      val msg = InputMsg.WITH_SEARCH_LIST (searchList, time)
+      val () = Mailbox.send (inputMailbox, msg)
     in
       loop (searchMailbox, inputMailbox)
     end