add functionality to return from NORMAL_SEARCH_MODE back to NORMAL_MODE, saving new search string and new search list

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

@@ -0,0 +1,40 @@
+structure NormalSearchModeWith =
+struct
+  open AppType
+
+  fun returnToNormalMode
+    ( app: app_type
+    , newBuffer
+    , newSearchString
+    , newSearchList
+    , newStartLine
+    , newMode
+    , newMsgs
+    ) =
+    let
+      val
+        { mode = _
+        , buffer = _
+        , searchString = _
+        , searchList = _
+        , startLine = _
+        , msgs = _
+        , bufferModifyTime
+        , windowWidth
+        , windowHeight
+        , cursorIdx
+        } = app
+    in
+      { mode = newMode
+      , buffer = newBuffer
+      , searchString = newSearchString
+      , searchList = newSearchList
+      , startLine = newStartLine
+      , bufferModifyTime = bufferModifyTime
+      , msgs = newMsgs
+      , windowWidth = windowWidth
+      , windowHeight = windowHeight
+      , cursorIdx = cursorIdx
+      }
+    end
+end

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

@@ -2,9 +2,10 @@ structure NormalSearchMode =
 struct
   open AppType
   open InputMsg
+  open MailboxType
 
   (* todo: redraw based on results of tempSearchList *)
-  fun parseChr (app: app_type, searchString, chr) =
+  fun addChr (app: app_type, searchString, chr) =
     let
       val c = String.implode [chr]
       val searchString = searchString ^ c
@@ -21,13 +22,50 @@ struct
       NormalModeWith.mode (app, mode, [])
     end
 
-  (* todo: switch to normal mode, save tempSearchList and searchString,
-   * and redraw *)
-  fun finishSearch (app: app_type, searchString, tempSearchList) = app
+  (* save search string and tempSearchList and return to normal mode *)
+  fun finishSearch (app: app_type, searchString, tempSearchList) = 
+    let
+      val {buffer, cursorIdx, windowWidth, windowHeight, startLine, ...} = app
+      val buffer = LineGap.goToStart buffer
+      val initialMsg = [SEARCH (buffer, searchString)]
+
+      (* move LineGap to first line displayed on screen *)
+      val buffer = LineGap.goToLine (startLine, buffer)
+
+      (* get new startLine which may move screen depending on cursor movements *)
+      val startLine = TextWindow.getStartLine
+        (buffer, startLine, cursorIdx, windowWidth, windowHeight)
+
+      (* move buffer to new startLine as required by TextBuilder.build *)
+      val buffer = LineGap.goToLine (startLine, buffer)
+
+      val msgs = TextBuilder.build
+        ( startLine
+        , cursorIdx
+        , buffer
+        , windowWidth
+        , windowHeight
+        , tempSearchList
+        , searchString
+        , initialMsg
+        )
+
+      val mode = NORMAL_MODE ""
+    in
+      NormalSearchModeWith.returnToNormalMode
+        ( app
+        , buffer
+        , searchString
+        , tempSearchList
+        , startLine
+        , mode
+        , msgs
+        )
+    end
 
   fun update (app, {searchString, tempSearchList}, msg, time) =
     case msg of
-      CHAR_EVENT chr => parseChr (app, searchString, chr)
+      CHAR_EVENT chr => addChr (app, searchString, chr)
     | KEY_ESC => NormalFinish.clearMode app
     | KEY_ENTER => finishSearch (app, searchString, tempSearchList)
     | RESIZE_EVENT (width, height) => app