verify that parsing saved file is successful

a.dsc

@@ -0,0 +1,2 @@
+x ~0.0499999858439 y 0.400000035763 x ~0.400000035763 y 0.350000023842 x ~0.100000038743 y 0.100000038743
+x 0.25 y ~0.449999958277 x 0.599999964237 y ~0.199999943376 x 0.0499999858439 y 0.0499999858439

ffi/glfw-input.c

@@ -13,6 +13,7 @@ int KEY_Z = GLFW_KEY_Z;
 int KEY_S = GLFW_KEY_S;
 int KEY_E = GLFW_KEY_E;
 int KEY_I = GLFW_KEY_I;
+int KEY_L = GLFW_KEY_L;
 
 // Calls function exported from SML 
 void mouseMoveCallback(GLFWwindow *window, double xpos, double ypos) {

ffi/glfw-input.sml

@@ -44,4 +44,6 @@ struct
     _symbol "KEY_E" public : ( unit -> int ) * ( int -> unit );
   val (KEY_I, _) =
     _symbol "KEY_I" public : ( unit -> int ) * ( int -> unit );
+  val (KEY_L, _) =
+    _symbol "KEY_L" public : ( unit -> int ) * ( int -> unit );
 end

functional-core/app-update.sml

@@ -182,7 +182,9 @@ struct
              in
                (model, DRAW drawMsg)
              end)
-    | [] => (* Nothing to redo. *) (model, NO_MAILBOX)
+    | [] => 
+        (* Nothing to redo. *) 
+        (model, NO_MAILBOX)
 
   fun toggleGraph (model: app_type) =
     if #showGraph model then
@@ -209,6 +211,9 @@ struct
       (model, FILE fileMsg)
     end
 
+  fun getLoadTriangleMsg model =
+    (model, FILE LOAD_TRIANGLES)
+
   fun update (model: app_type, inputMsg) =
     case inputMsg of
       MOUSE_MOVE {x = mouseX, y = mouseY} =>
@@ -222,4 +227,5 @@ struct
     | REDO_ACTION => redoAction model
     | KEY_G => toggleGraph model
     | KEY_CTRL_S => getSaveTrianglesMsg model
+    | KEY_CTRL_L => getLoadTriangleMsg model
 end

imperative-shell/file-thread.sml

@@ -14,13 +14,13 @@ struct
 
   fun extractTriangle lst =
     case lst of
-      [ X , COORD x1
-      , Y , COORD y1
-      , X , COORD x2
+      [ X, COORD x1
+      , Y, COORD y1
+      , X, COORD x2
 
-      , Y , COORD y2
-      , X , COORD x3
-      , Y , COORD y3
+      , Y, COORD y2
+      , X, COORD x3
+      , Y, COORD y3
       ] => SOME {x1 = x1, y1 = y1, x2 = x2, y2 = y2, x3 = x3, y3 = y3}
     | _ => NONE
 
@@ -41,16 +41,14 @@ struct
       let
         val chr = String.sub (line, pos)
       in
-        if chr = #" " then
+        if chr = #" " orelse chr = #"\n" then
           let
-            val strToken =
-              String.substring (line, lastSpacePos, pos - (lastSpacePos + 1))
+            val strToken = String.substring
+              (line, lastSpacePos + 1, pos - (lastSpacePos + 1))
             val token = tokeniseString strToken
           in
             helpParseLine (line, pos + 1, token :: acc, pos)
           end
-        else if chr = #"\n" then
-          List.rev acc
         else
           helpParseLine (line, pos + 1, acc, lastSpacePos)
       end
@@ -62,17 +60,27 @@ struct
 
   datatype parse_resule = OK of AppType.triangle list | PARSE_ERROR
 
-  fun helpParse (io, acc) =
+  fun parse (io, acc) =
     case TextIO.inputLine io of
       SOME line =>
-        (case parseLine line of
-           SOME tri => helpParse (io, tri :: acc)
-         | NONE => PARSE_ERROR)
+        let
+          val line = parseLine line
+        in
+          (case line of
+             SOME tri => parse (io, tri :: acc)
+           | NONE => PARSE_ERROR)
+        end
     | NONE => let val triangles = List.rev acc in OK triangles end
 
-  fun parse () =
-    let val io = TextIO.openIn filename
-    in helpParse (io, [])
+  fun loadTriangles () =
+    let
+      val io = TextIO.openIn filename
+      val triangles = parse (io, [])
+      val _ = TextIO.closeIn io
+    in
+      case triangles of
+        OK triangles => print "parse success\n"
+      | PARSE_ERROR => print "parse error\n"
     end
 
   fun helpSaveTriangles (triangles, io) =
@@ -111,7 +119,7 @@ struct
       val _ =
         case Mailbox.recv fileMailbox of
           SAVE_TRIANGLES triangles => saveTriangles triangles
-        | LOAD_TRIANGLES => ()
+        | LOAD_TRIANGLES => loadTriangles ()
         | EXPORT_TRIANGLES triangles => ()
     in
       run fileMailbox

imperative-shell/input-callbacks.sml

@@ -46,6 +46,11 @@ struct
       key = Input.KEY_S () andalso action = Input.PRESS () andalso mods = 0x002
     then
       Mailbox.send (mailbox, KEY_CTRL_S)
+    else if
+      (* ctrl-l *)
+      key = Input.KEY_L () andalso action = Input.PRESS () andalso mods = 0x002
+    then
+      Mailbox.send (mailbox, KEY_CTRL_L)
     else
       ()
 

message-types/input-msg.sml

@@ -9,6 +9,7 @@ sig
   | REDO_ACTION
   | KEY_G
   | KEY_CTRL_S
+  | KEY_CTRL_L
 end
 
 structure InputMessage :> INPUT_MESSAGE =
@@ -22,4 +23,5 @@ struct
   | REDO_ACTION
   | KEY_G
   | KEY_CTRL_S
+  | KEY_CTRL_L
 end