Open orx-olive script object loading to the public.

orx-olive/src/main/kotlin/KtsObjectLoader.kt

@@ -1,35 +0,0 @@
-package org.openrndr.extra.olive
-
-import java.io.InputStream
-import java.io.Reader
-import javax.script.ScriptEngineManager
-
-internal class LoadException(message: String? = null, cause: Throwable? = null) : RuntimeException(message, cause)
-
-internal class KtsObjectLoader(classLoader: ClassLoader? = Thread.currentThread().contextClassLoader) {
-
-    private val engine = ScriptEngineManager(classLoader).getEngineByExtension("kts")
-
-    init {
-        if (engine == null) {
-            throw RuntimeException("could not create scripting engine")
-        }
-    }
-
-    inline fun <R> safeEval(noinline evaluation: () -> R?) = try {
-        evaluation()
-    } catch (e: Exception) {
-        throw LoadException("Cannot load script", e)
-    }
-
-    inline fun <reified T> Any?.castOrError() = takeIf { it is T }?.let { it as T }
-        ?: throw IllegalArgumentException("Cannot cast $this to expected type ${T::class}")
-
-    inline fun <reified T> load(script: String): T = safeEval { engine.eval(script) }.castOrError()
-
-    inline fun <reified T> load(reader: Reader): T = safeEval { engine.eval(reader) }.castOrError()
-
-    inline fun <reified T> load(inputStream: InputStream): T = load(inputStream.reader())
-
-    inline fun <reified T> loadAll(vararg inputStream: InputStream): List<T> = inputStream.map(::load)
-}

orx-olive/src/main/kotlin/Olive.kt

@@ -89,15 +89,13 @@ class Olive<P : Program>(val resources: Resources? = null) : Extension {
 
             watcher = program.watchFile(File(script)) {
                 try {
-                    val script = it.readText()
-                    val func = KtsObjectLoader().load<P.() -> Unit>(script)
+                    val func = loadFromScript<P.()->Unit>(it)
 
                     program.extensions.clear()
                     program.extensions.addAll(originalExtensions)
 
                     trackedListeners.forEach { l -> l.restoreListeners(store) }
                     session?.end()
-
                     session = Session.root.fork()
 
                     @Suppress("UNCHECKED_CAST")

orx-olive/src/main/kotlin/ScriptObjectLoader.kt

@@ -0,0 +1,59 @@
+package org.openrndr.extra.olive
+
+import java.io.File
+import java.io.InputStream
+import java.io.Reader
+import java.net.MalformedURLException
+import java.net.URL
+import javax.script.ScriptEngineManager
+
+class LoadException(message: String? = null, cause: Throwable? = null) : RuntimeException(message, cause)
+
+class ScriptObjectLoader(classLoader: ClassLoader? = Thread.currentThread().contextClassLoader) {
+    val engine = ScriptEngineManager(classLoader).getEngineByExtension("kts")
+
+    init {
+        require(engine != null) { "could not create scripting engine" }
+    }
+
+    fun <R> safeEval(evaluation: () -> R?) = try {
+        evaluation()
+    } catch (e: Exception) {
+        throw LoadException("Cannot load script", e)
+    }
+
+    inline fun <reified T> Any?.castOrError() = takeIf { it is T }?.let { it as T }
+            ?: throw IllegalArgumentException("Cannot cast $this to expected type ${T::class}")
+
+    inline fun <reified T> load(script: String): T = safeEval { engine.eval(script) }.castOrError()
+
+    inline fun <reified T> load(reader: Reader): T = safeEval { engine.eval(reader) }.castOrError()
+
+    inline fun <reified T> load(inputStream: InputStream): T = load(inputStream.reader())
+
+    inline fun <reified T> loadAll(vararg inputStream: InputStream): List<T> = inputStream.map(::load)
+}
+
+/**
+ * Load an object from script.
+ */
+inline fun <reified T : Any> loadFromScript(fileOrUrl: String, loader: ScriptObjectLoader = ScriptObjectLoader()): T {
+    val isUrl = try {
+        URL(fileOrUrl); true
+    } catch (e: MalformedURLException) {
+        false
+    }
+
+    val script = if (isUrl) {
+        URL(fileOrUrl).readText()
+    } else {
+        File(fileOrUrl).readText()
+    }
+    return loader.load(script)
+}
+
+/**
+ * Load an object from script file
+ */
+inline fun <reified T : Any> loadFromScript(file: File, loader: ScriptObjectLoader = ScriptObjectLoader()): T =
+        loader.load(file.readText())