a little additional scaffolding for normal mode

fcore/app-type.sml

@@ -1,6 +1,8 @@
 structure AppType =
 struct
-  datatype mode = NORMAL_MODE of string | NORMAL_SEARCH_MODE of string
+  datatype mode =
+    NORMAL_MODE of string
+  | NORMAL_SEARCH_MODE of {searchString: string, tempSearchList: int vector}
 
   type app_type =
     { mode: mode

fcore/app-update.sml

@@ -4,6 +4,7 @@ struct
 
   fun update (app: app_type, msg, time) =
     case #mode app of
-      NORMAL_MODE str => NormalMode.update (app, str, msg, time)
-    | NORMAL_SEARCH_MODE str => NormalSearchMode.update (app, str, msg, time)
+      NORMAL_MODE modeData => NormalMode.update (app, modeData, msg, time)
+    | NORMAL_SEARCH_MODE modeData =>
+        NormalSearchMode.update (app, modeData, msg, time)
 end

fcore/normal-mode/normal-mode.sml

@@ -5,6 +5,16 @@ struct
   open AppType
   open InputMsg
 
+  (* todo: create draw msg showing search bar *)
+  fun switchToNormalSearchMode (app: app_type) =
+    let
+      val mode =
+        NORMAL_SEARCH_MODE
+          {searchString = "", tempSearchList = Vector.fromList []}
+    in
+      AppWith.mode (app, mode, [])
+    end
+
   fun getNumLength (pos, str) =
     if pos = String.size str then
       pos
@@ -82,6 +92,7 @@ struct
         else NormalMove.moveToLine (app, count - 1)
     | #"%" => NormalMove.moveToMatchingPair app
     | #"x" => NormalDelete.removeChr (app, count, time)
+    | #"/" => switchToNormalSearchMode app
     (* multi-char commands which can be appended *)
     | #"t" => appendChr (app, chr, str)
     | #"T" => appendChr (app, chr, str)
@@ -258,4 +269,5 @@ struct
     | KEY_ESC => Finish.clearMode app
     | RESIZE_EVENT (width, height) => Finish.resizeText (app, width, height)
     | WITH_SEARCH_LIST searchList => Finish.withSearchList (app, searchList)
+    | KEY_ENTER => app
 end

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

@@ -3,10 +3,33 @@ struct
   open AppType
   open InputMsg
 
-  fun update (app, searchString, msg, time) =
+  (* todo: redraw based on results of tempSearchList *)
+  fun parseChr (app: app_type, searchString, chr) =
+    let
+      val c = String.implode [chr]
+      val searchString = searchString ^ c
+
+      val {buffer, cursorIdx, ...} = app
+      val buffer = LineGap.goToIdx (cursorIdx - 1111, buffer)
+      val tempSearchList =
+        SearchList.buildRange (buffer, searchString, cursorIdx + 1111)
+
+      val mode =
+        NORMAL_SEARCH_MODE
+          {searchString = searchString, tempSearchList = tempSearchList}
+    in
+      AppWith.mode (app, mode, [])
+    end
+
+  (* todo: switch to normal mode, save tempSearchList and searchString,
+   * and redraw *)
+  fun finishSearch (app: app_type, searchString, tempSearchList) = app
+
+  fun update (app, {searchString, tempSearchList}, msg, time) =
     case msg of
-      CHAR_EVENT chrCmd => app
+      CHAR_EVENT chr => parseChr (app, searchString, chr)
     | KEY_ESC => Finish.clearMode app
+    | KEY_ENTER => finishSearch (app, searchString, tempSearchList)
     | RESIZE_EVENT (width, height) => app
     | WITH_SEARCH_LIST searchList => app
 end

ffi/glfw-input.c

@@ -7,6 +7,7 @@ int PRESS = GLFW_PRESS;
 int REPEAT = GLFW_REPEAT;
 int RELEASE = GLFW_RELEASE;
 int KEY_ESC = GLFW_KEY_ESCAPE;
+int KEY_ENTER = GLFW_KEY_ENTER;
 
 void framebufferSizeCallback(GLFWwindow* window, int width, int height) {
   glViewport(0, 0, width, height);

ffi/glfw-input.sml

@@ -33,4 +33,7 @@ struct
   val (KEY_ESC, _) =
     _symbol "KEY_ESC" public : ( unit -> int ) * ( int -> unit );
   val KEY_ESC = KEY_ESC ()
+  val (KEY_ENTER, _) =
+    _symbol "KEY_ENTER" public : ( unit -> int ) * ( int -> unit );
+  val KEY_ENTER = KEY_ENTER ()
 end

message-types/input-msg.sml

@@ -3,6 +3,7 @@ struct
   datatype t =
     CHAR_EVENT of char
   | KEY_ESC
+  | KEY_ENTER
   | RESIZE_EVENT of int * int
   | WITH_SEARCH_LIST of int vector
 end

shell/shell.sml

@@ -25,6 +25,8 @@ struct
     in
       if key = KEY_ESC andalso action = PRESS andalso mods = 0 then
         Mailbox.send (inputMailbox, InputMsg.KEY_ESC)
+      else if key = KEY_ENTER andalso action = PRESS andalso mods = 0 then
+        Mailbox.send (inputMailbox, InputMsg.KEY_ENTER)
       else
         ()
     end