fix further compiler errors

fcore/move.sml

@@ -61,7 +61,7 @@ end
 
 functor MakeDfaMove(Fn: DFA_MOVE): MAKE_DFA_MOVE =
 struct
-  fun move (app: AppType.app_type, count) =
+  fun move (app: AppType.app_type, count) : AppType.app_type =
     let
       val {buffer, cursorIdx, searchList, bufferModifyTime, ...} = app
       val buffer = LineGap.goToIdx (cursorIdx, buffer)

fcore/normal-mode/make-normal-delete.sml

@@ -6,6 +6,7 @@ end
 functor MakeNormalDelete(Fn: MAKE_NORMAL_DELETE) =
 struct
   open AppType
+  open DrawMsg
   open MailboxType
 
   fun finishAfterDeletingBuffer (app: app_type, low, buffer, time, msgs) =
@@ -380,7 +381,7 @@ struct
       , time
       )
 
-  fun deleteToStart (app: app_type, time) =
+  fun deleteToStart (app: app_type, time) : AppType.app_type =
     let
       val {cursorIdx, buffer, windowWidth, windowHeight, searchString, ...} =
         app
@@ -403,7 +404,7 @@ struct
       val visualScrollColumn = 0
       val buffer = LineGap.goToIdx (cursorIdx, buffer)
 
-      val drawMsg = TextBuilder.build
+      val drawMsg = NormalModeTextBuilder.build
         ( startLine
         , cursorIdx
         , buffer
@@ -411,9 +412,12 @@ struct
         , windowHeight
         , searchList
         , searchString
-        , initialMsg
+        , visualScrollColumn
         )
+      val drawMsg = Vector.concat drawMsg
+      val drawMsg = DRAW_TEXT drawMsg
 
+      val msgs = DRAW drawMsg :: initialMsg
       val mode = NORMAL_MODE ""
     in
       NormalModeWith.bufferAndCursorIdx
@@ -423,7 +427,7 @@ struct
         , mode
         , startLine
         , searchList
-        , drawMsg
+        , msgs
         , time
         , visualScrollColumn
         )

fcore/normal-mode/normal-finish.sml

@@ -40,7 +40,8 @@ struct
         , visualScrollColumn
         )
       val drawMsg = Vector.concat drawMsg
-      val drawMsg = DrawMsg.DRAW_TEXT drawMsg
+      val drawMsg = DRAW_TEXT drawMsg
+      val drawMsg = [DRAW drawMsg]
 
       val mode = NORMAL_MODE ""
     in
@@ -105,7 +106,8 @@ struct
         , visualScrollColumn
         )
       val drawMsg = Vector.concat drawMsg
-      val drawMsg = DrawMsg.DRAW_TEXT drawMsg
+      val drawMsg = DRAW_TEXT drawMsg
+      val drawMsg = [DRAW drawMsg]
     in
       NormalModeWith.bufferAndSize
         ( app
@@ -125,7 +127,8 @@ struct
    * Since the cursor may move away a lot, it is best to recenter.
    * *)
   fun buildTextAndClearAfterChr
-    (app: app_type, buffer, cursorIdx, searchList, initialMsg, bufferModifyTime) =
+    (app: app_type, buffer, cursorIdx, searchList, initialMsg, bufferModifyTime) :
+    AppType.app_type =
     let
       val {windowWidth, windowHeight, startLine, searchString, ...} = app
 
@@ -155,7 +158,8 @@ struct
         , visualScrollColumn
         )
       val drawMsg = Vector.concat drawMsg
-      val drawMsg = [DrawMsg.DRAW_TEXT drawMsg]
+      val drawMsg = DRAW_TEXT drawMsg
+      val drawMsg = [DRAW drawMsg]
 
       val mode = NORMAL_MODE ""
     in
@@ -203,7 +207,8 @@ struct
         , visualScrollColumn
         )
       val drawMsg = Vector.concat drawMsg
-      val drawMsg = [DrawMsg.DRAW_TEXT drawMsg]
+      val drawMsg = DRAW_TEXT drawMsg
+      val drawMsg = [DRAW drawMsg]
     in
       let
         val _ = raise Fail "centering to line is unimplemented\n"

fcore/normal-mode/normal-move.sml

@@ -2,7 +2,7 @@ structure NormalMove =
 struct
   open AppType
 
-  fun moveToStart (app: app_type) =
+  fun moveToStart (app: app_type) : AppType.app_type =
     let
       val
         { buffer
@@ -30,7 +30,8 @@ struct
         , visualScrollColumn
         )
       val drawMsg = Vector.concat drawMsg
-      val drawMsg = [DrawMsg.DRAW_TEXT drawMsg]
+      val drawMsg = DrawMsg.DRAW_TEXT drawMsg
+      val drawMsg = [MailboxType.DRAW drawMsg]
 
       val mode = NORMAL_MODE ""
     in
@@ -92,7 +93,8 @@ struct
         , visualScrollColumn
         )
       val drawMsg = Vector.concat drawMsg
-      val drawMsg = [DrawMsg.DRAW_TEXT drawMsg]
+      val drawMsg = DrawMsg.DRAW_TEXT drawMsg
+      val drawMsg = [MailboxType.DRAW drawMsg]
 
       val mode = NORMAL_MODE ""
     in
@@ -148,7 +150,8 @@ struct
           , visualScrollColumn
           )
         val drawMsg = Vector.concat drawMsg
-        val drawMsg = [DrawMsg.DRAW_TEXT drawMsg]
+        val drawMsg = DrawMsg.DRAW_TEXT drawMsg
+        val drawMsg = [MailboxType.DRAW drawMsg]
 
         val mode = NORMAL_MODE ""
       in
@@ -207,7 +210,8 @@ struct
           , visualScrollColumn
           )
         val drawMsg = Vector.concat drawMsg
-        val drawMsg = [DrawMsg.DRAW_TEXT drawMsg]
+        val drawMsg = DrawMsg.DRAW_TEXT drawMsg
+        val drawMsg = [MailboxType.DRAW drawMsg]
       in
         NormalModeWith.bufferAndCursorIdx
           ( app
@@ -269,7 +273,14 @@ struct
 
   fun moveToNextMatch (app: app_type, count) =
     let
-      val {cursorIdx, searchList, buffer, bufferModifyTime, ...} = app
+      val
+        { cursorIdx
+        , searchList
+        , buffer
+        , bufferModifyTime
+        , visualScrollColumn
+        , ...
+        } = app
       val newCursorIdx = SearchList.nextMatch (cursorIdx, searchList, count)
     in
       if newCursorIdx = ~1 then