Add option to put bindings into REPL

Author: hanslovsky

src/main/kotlin/org/scijava/scripting/fx/SciJavaReplFX.kt

@@ -123,6 +123,10 @@ class SciJavaReplFX(context: Context) {
         _prompt.prefHeight = height
     }
 
+    fun putBindings(bindings: Map<String, *>) = repl.interpreter.bindings.putAll(bindings)
+
+    fun putBindings(vararg bindings: Pair<String, *>) = putBindings(mapOf(*bindings))
+
 
 
 }

src/main/kotlin/org/scijava/scripting/fx/ScijavaReplFXTabs.kt

@@ -20,9 +20,31 @@ class ScijavaReplFXTabs(
         private val exitKeyCombination: Collection<KeyCombination> = setOf (KeyCodeCombination(KeyCode.D, KeyCombination.CONTROL_DOWN)),
         private val createNewReplCombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.T, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_DOWN)),
         private val cycleTabsForwardKombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.TAB, KeyCombination.CONTROL_DOWN)),
-        private val cycleTabsBackwardKombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.TAB, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_DOWN))
+        private val cycleTabsBackwardKombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.TAB, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_DOWN)),
+        private val bindings: Map<String, *> = mapOf<String, Any>()
 ) {
 
+    constructor(
+            context: Context,
+            increaseFontKeys: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.EQUALS, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_ANY)),
+            decreaseFontKeys: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.MINUS, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_ANY)),
+            evalKeys: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.ENTER, KeyCombination.CONTROL_DOWN)),
+            exitKeyCombination: Collection<KeyCombination> = setOf (KeyCodeCombination(KeyCode.D, KeyCombination.CONTROL_DOWN)),
+            createNewReplCombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.T, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_DOWN)),
+            cycleTabsForwardKombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.TAB, KeyCombination.CONTROL_DOWN)),
+            cycleTabsBackwardKombination: Collection<KeyCombination> = setOf(KeyCodeCombination(KeyCode.TAB, KeyCombination.CONTROL_DOWN, KeyCombination.SHIFT_DOWN)),
+            vararg bindings: Pair<String, *>
+    ) : this(
+            context,
+            increaseFontKeys,
+            decreaseFontKeys,
+            evalKeys,
+            exitKeyCombination,
+            createNewReplCombination,
+            cycleTabsForwardKombination,
+            cycleTabsBackwardKombination,
+            mapOf(*bindings))
+
 
     private val tabPane = TabPane()
             .also { it.tabClosingPolicy = TabPane.TabClosingPolicy.ALL_TABS }
@@ -44,8 +66,8 @@ class ScijavaReplFXTabs(
 
     fun createAndAddTab()  {
         val repl = SciJavaReplFX(context)
-
-        repl.setPromptPrefHeight(250.0)
+                .also { it.setPromptPrefHeight(250.0) }
+                .also { it.putBindings(bindings) }
 
         repl.node.addEventHandler(KeyEvent.KEY_PRESSED) {
             if (increaseFontKeys.any { c -> c.match(it) }) {

src/test/kotlin/org/scijava/scripting/fx/SciJavaReplFXExample.kt

@@ -6,13 +6,17 @@ import javafx.scene.Scene
 import javafx.scene.layout.StackPane
 import javafx.stage.Stage
 import org.scijava.Context
+import kotlin.math.sqrt
 
 fun main() {
 
     val context     = Context()
     PlatformImpl.startup {}
 
-    val tabPane = ScijavaReplFXTabs(context).also { it.createAndAddTab() }
+    val tabPane = ScijavaReplFXTabs(
+            context,
+            bindings = *arrayOf(Pair("mySqrt", { x: Double -> sqrt(x) })))
+            .also { it.createAndAddTab() }
 
     val root = StackPane(tabPane.node)
     Platform.runLater {