better file selection, rerun handling

ide/src/main/kotlin/befide/ide/ActionView.kt

@@ -40,6 +40,8 @@ class ActionView(val interp: Interpreter, val codeView: CodeView, val ioView: IO
     fun start(rate: Double) {
         stop()
 
+        if (interp.ip.mode == IpMode.Inactive) reset()
+
         isRunning = true
         canReset = true
 
@@ -83,23 +85,23 @@ class ActionView(val interp: Interpreter, val codeView: CodeView, val ioView: IO
         }
     }
 
-    fun saveAs() {
+    private val chooser: FileChooser = FileChooser().apply {
-        val fc = FileChooser()
+        title = "Befunge File"
-        fc.title = "Save Befunge File"
+        extensionFilters.setAll(
+                FileChooser.ExtensionFilter("Befunge 93", "*.bf", "*.b93"),
+                FileChooser.ExtensionFilter("Befunge 98", "*.bf", "*.b98"))
+    }
 
-        val file: File? = fc.showSaveDialog(primaryStage)
+    fun saveAs() {
+        val file: File? = chooser.showSaveDialog(primaryStage)
         if (file != null) {
             saveFile = file
-
             save()
         }
     }
 
     fun open() {
-        val fc = FileChooser()
+        val file: File? = chooser.showOpenDialog(primaryStage)
-        fc.title = "Open Befunge File"
-
-        val file: File? = fc.showOpenDialog(primaryStage)
         if (file != null) {
             saveFile = file
 
@@ -110,7 +112,7 @@ class ActionView(val interp: Interpreter, val codeView: CodeView, val ioView: IO
         }
     }
 
-    fun new(){
+    fun new() {
         clearCode()
         saveFile = null
         editorView.title = "Befide"

ide/src/main/kotlin/befide/ide/CodeView.kt

@@ -131,6 +131,25 @@ class CodeView(val interp: Interpreter) : View() {
                         labels[cursorPos].value = Value(' ')
                     }
 
+                    ch == '\u000d' -> when (cursorDelta) { // return
+                        Vec(1, 0) -> {
+                            move(Vec(0, 1))
+                            cursorPos = Vec(0, cursorPos.y)
+                        }
+                        Vec(-1, 0) -> {
+                            move(Vec(0, -1))
+                            cursorPos = Vec(interp.funge.width - 1, cursorPos.y)
+                        }
+                        Vec(0, 1) -> {
+                            move(Vec(-1, 0))
+                            cursorPos = Vec(cursorPos.x, 0)
+                        }
+                        Vec(0, -1) -> {
+                            move(Vec(1, 0))
+                            cursorPos = Vec(cursorPos.x, interp.funge.height - 1)
+                        }
+                    }
+
                     else -> {
                         println("'$ch' (${ch.toInt()})")
                     }