add load functionality (but note that saving is still hardcoded right now)

functional-core/app/app-update.sml

@@ -364,9 +364,9 @@ struct
       (model, fileMsg)
     end
 
-  fun useTriangles (model, triangles) =
+  fun useTrianglesInNormalMode (model, triangles) =
     let
-      val model = AppWith.useTriangles (model, triangles)
+      val model = AppWith.useTrianglesAndSetNormalMode (model, triangles)
       val drawVec = Triangles.toVector model
       val drawMsg = DRAW_TRIANGLES_AND_RESET_DOTS drawVec
       val drawMsg = [DRAW drawMsg]
@@ -413,7 +413,7 @@ struct
     | ARROW_DOWN => moveArrowDown model
     | KEY_ENTER => enterOrSpaceCoordinates model
     | KEY_SPACE => enterOrSpaceCoordinates model
-    | USE_TRIANGLES triangles => useTriangles (model, triangles)
+    | USE_TRIANGLES triangles => useTrianglesInNormalMode (model, triangles)
     | TRIANGLES_LOAD_ERROR => trianglesLoadError model
     | FILE_BROWSER_AND_PATH {fileBrowser, path} =>
         handleFileBrowserAndPathInNormalMode (model, fileBrowser, path)
@@ -538,6 +538,25 @@ struct
       redrawFileBrowser model
     end
 
+  fun selectCurrentFileItem model =
+    let
+      val {fileBrowser, fileBrowserIdx, openFilePath, ...} = model
+    in
+      if Vector.length fileBrowser > 0 then
+        let
+          val path =
+            case Vector.sub (fileBrowser, fileBrowserIdx) of
+              IS_FILE str => str
+            | IS_FOLDER str => str
+          val path = String.concat [openFilePath, "/", path]
+          val fileMsg = SELECT_PATH path
+        in
+          (model, [FILE fileMsg])
+        end
+      else
+        (model, [])
+    end
+
   fun updateBrowseMode (model: app_type, inputMsg) =
     case inputMsg of
       ARROW_UP => browseModeArrowUp model
@@ -545,12 +564,13 @@ struct
     | TRIANGLES_LOAD_ERROR => trianglesLoadError model
     (* todo: 
     | ARROW_LEFT =>
-    | ARROW_RIGHT =>
-    | KEY_ENTER =>
-    | KEY_SPACE => 
     *)
+    | ARROW_RIGHT => selectCurrentFileItem model
+    | KEY_ENTER => selectCurrentFileItem model
+    | KEY_SPACE => selectCurrentFileItem model
     | FILE_BROWSER_AND_PATH {fileBrowser, path} =>
         handleFileBrowserAndPathInBrowseMode (model, fileBrowser, path)
+    | USE_TRIANGLES triangles => useTrianglesInNormalMode (model, triangles)
     | _ => (model, [])
 
   fun update (model: app_type, inputMsg) =

functional-core/app/app-with.sml

@@ -58,7 +58,8 @@ sig
     * int
     -> AppType.app_type
 
-  val useTriangles: AppType.app_type * AppType.triangle list -> AppType.app_type
+  val useTrianglesAndSetNormalMode: AppType.app_type * AppType.triangle list
+                                    -> AppType.app_type
 end
 
 structure AppWith :> APP_WITH =
@@ -559,10 +560,10 @@ struct
       }
     end
 
-  fun useTriangles (app: app_type, triangles) =
+  fun useTrianglesAndSetNormalMode (app: app_type, triangles) =
     let
       val
-        { mode
+        { mode = _
         , xClickPoints
         , yClickPoints
         , numClickPoints
@@ -584,7 +585,7 @@ struct
 
       val triangleStage = NO_TRIANGLE
     in
-      { mode = mode
+      { mode = AppType.NORMAL_MODE
       , triangleStage = triangleStage
       , triangles = triangles
       , undo = []

imperative-shell/file-thread.sml

@@ -117,9 +117,9 @@ struct
         end
     | NONE => let val triangles = List.rev acc in OK triangles end
 
-  fun loadTriangles inputMailbox =
+  fun loadTriangles (path, inputMailbox) =
     let
-      val io = TextIO.openIn filename
+      val io = TextIO.openIn path
       val triangles = parse (io, [])
       val _ = TextIO.closeIn io
 
@@ -168,36 +168,45 @@ struct
       ()
     end
 
-  fun getDirList (dir, acc) =
+  fun getDirList (dir, acc, rootPath) =
     case OS.FileSys.readDir dir of
       SOME path =>
-        if OS.FileSys.isDir path then
+        let
-          getDirList (dir, AppType.IS_FOLDER path :: acc)
+          val folderPath = String.concat [rootPath, "/", path]
-        else if OS.FileSys.isLink path then
+        in
-          getDirList (dir, acc)
+          if OS.FileSys.isDir folderPath then
+            getDirList (dir, AppType.IS_FOLDER path :: acc, rootPath)
+          else if OS.FileSys.isLink folderPath then
+            getDirList (dir, acc, rootPath)
           else
-          getDirList (dir, AppType.IS_FILE path :: acc)
+            getDirList (dir, AppType.IS_FILE path :: acc, rootPath)
+        end
     | NONE => let val acc = List.rev acc in Vector.fromList acc end
 
   fun loadFiles (path, inputMailbox) =
     let
       val path = if String.size path = 0 then OS.FileSys.getDir () else path
       val dir = OS.FileSys.openDir path
-      val dirList = getDirList (dir, [])
+      val dirList = getDirList (dir, [], path)
       val _ = OS.FileSys.closeDir dir
       val inputMsg = FILE_BROWSER_AND_PATH {fileBrowser = dirList, path = path}
     in
       Mailbox.send (inputMailbox, inputMsg)
     end
 
+  fun selectPath (path, inputMailbox) =
+    if OS.FileSys.isDir path then loadFiles (path, inputMailbox)
+    else loadTriangles (path, inputMailbox)
+
   fun run (fileMailbox, inputMailbox) =
     let
       val _ =
         case Mailbox.recv fileMailbox of
           SAVE_TRIANGLES triangles => saveTriangles triangles
-        | LOAD_TRIANGLES => loadTriangles inputMailbox
+        | LOAD_TRIANGLES => loadTriangles (filename, inputMailbox)
         | EXPORT_TRIANGLES triangles => exportTriangles triangles
         | LOAD_FILES path => loadFiles (path, inputMailbox)
+        | SELECT_PATH path => selectPath (path, inputMailbox)
     in
       run (fileMailbox, inputMailbox)
     end

message-types/file-msg.sml

@@ -5,6 +5,7 @@ sig
   | LOAD_TRIANGLES
   | EXPORT_TRIANGLES of AppType.triangle list
   | LOAD_FILES of string
+  | SELECT_PATH of string
 end
 
 structure FileMessage :> FILE_MESSAGE =
@@ -14,4 +15,5 @@ struct
   | LOAD_TRIANGLES
   | EXPORT_TRIANGLES of AppType.triangle list
   | LOAD_FILES of string
+  | SELECT_PATH of string
 end