8011233: Create a Nashorn shell for JavaFX

Reviewed-by: lagergren, sundar

nashorn/make/build.xml

@@ -139,6 +139,31 @@
       </manifest>
     </jar>
   </target>
+  
+  <target name="build-fxshell" depends="jar">
+    <description>Builds the javafx shell.</description>
+    <mkdir dir="${fxshell.classes.dir}"/>
+    <javac srcdir="${fxshell.dir}"
+           destdir="${fxshell.classes.dir}"
+           classpath="${dist.jar}:${javac.classpath}"
+           debug="${javac.debug}"
+           encoding="${javac.encoding}"
+           includeantruntime="false">
+    </javac>
+    <jar jarfile="${fxshell.jar}" manifest="${meta.inf.dir}/MANIFEST.MF" index="true" filesetmanifest="merge">
+      <fileset dir="${fxshell.classes.dir}"/>
+      <manifest>
+        <attribute name="Archiver-Version" value="n/a"/>
+        <attribute name="Build-Jdk" value="${java.runtime.version}"/>
+        <attribute name="Built-By" value="n/a"/>
+        <attribute name="Created-By" value="Ant jar task"/>
+        <section name="jdk/nashorn/">
+          <attribute name="Implementation-Title" value="Oracle Nashorn FXShell"/>
+          <attribute name="Implementation-Version" value="${nashorn.version}"/>
+        </section>
+      </manifest>
+    </jar>
+  </target>
 
   <target name="javadoc" depends="prepare">
     <javadoc destdir="${dist.javadoc.dir}" use="yes" overview="src/overview.html" windowtitle="${nashorn.product.name} ${nashorn.version}" additionalparam="-quiet" failonerror="true">

nashorn/make/project.properties

@@ -65,6 +65,12 @@ dist.dir=dist
 dist.jar=${dist.dir}/nashorn.jar
 dist.javadoc.dir=${dist.dir}/javadoc
 
+# nashorn javafx shell
+fxshell.tool = jdk.nashorn.tools.FXShell
+fxshell.classes.dir = ${build.dir}/fxshell/classes
+fxshell.dir = tools/fxshell
+fxshell.jar = ${dist.dir}/nashornfx.jar
+
 # jars refererred
 file.reference.testng.jar=test/lib/testng.jar
 

nashorn/tools/fxshell/jdk/nashorn/tools/FXShell.java

@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.nashorn.tools;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.InputStreamReader;
+import java.io.UnsupportedEncodingException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import javafx.application.Application;
+import javafx.stage.Stage;
+import javax.script.Invocable;
+import javax.script.ScriptContext;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
+
+/**
+ * This shell is designed to launch a JavaFX application written in Nashorn JavaScript.
+ */
+public class FXShell extends Application {
+    /**
+     * Script engine manager to search.
+     */
+    private ScriptEngineManager manager;
+    /**
+     * Nashorn script engine factory.
+     */
+    private NashornScriptEngineFactory factory;
+    /**
+     * Main instance of Nashorn script engine.
+     */
+    private ScriptEngine engine;
+
+    /**
+     * Needed so that the FX launcher can create an instance of this class.
+     */
+    public FXShell() {
+    }
+
+    /**
+     * Main entry point. Never actually used.
+     * @param args Command lien arguments.
+     */
+    public static void main(String[] args) {
+        launch(args);
+    }
+
+    /*
+     * Application overrides.
+     */
+
+    @Override
+    public void init() throws Exception {
+        // Script engine manager to search.
+        this.manager = new ScriptEngineManager();
+
+        // Locate the Nashorn script engine factory.  Needed for passing arguments.
+        for (ScriptEngineFactory engineFactory : this.manager.getEngineFactories()) {
+             if (engineFactory.getEngineName().equals("Oracle Nashorn") && engineFactory instanceof NashornScriptEngineFactory) {
+                this.factory = (NashornScriptEngineFactory)engineFactory;
+            }
+        }
+
+        // If none located.
+        if (this.factory == null) {
+            System.err.println("Nashorn script engine not available");
+            System.exit(1);
+        }
+
+        // Get the command line and JNLP parameters.
+        final Parameters parameters = getParameters();
+
+        // To collect the script paths and command line arguments.
+        final List<String> paths = new ArrayList<>();
+        final List<String> args = new ArrayList<>();
+
+        // Pull out relevant JNLP named parameters.
+        final Map<String, String> named = parameters.getNamed();
+        for (Map.Entry<String, String> entry : named.entrySet()) {
+            final String key = entry.getKey();
+            final String value = entry.getValue();
+
+            if ((key.equals("cp") || key.equals("classpath")) && value != null) {
+                args.add("-classpath");
+                args.add(value);
+            } else if (key.equals("source") && value != null && value.toLowerCase().endsWith(".js")) {
+                paths.add(value);
+            }
+        }
+
+        // Pull out relevant command line arguments.
+        boolean addNextArg = false;
+        boolean addAllArgs = false;
+        for (String parameter : parameters.getUnnamed()) {
+            if (addAllArgs || addNextArg) {
+                args.add(parameter);
+                addNextArg = false;
+            } else if (parameter.equals("--")) {
+                args.add(parameter);
+                addAllArgs = true;
+            } else if (parameter.startsWith("-")) {
+                args.add(parameter);
+                addNextArg = parameter.equals("-cp") || parameter.equals("-classpath");
+            } else if (parameter.toLowerCase().endsWith(".js")) {
+                paths.add(parameter);
+            }
+        }
+
+        // Create a Nashorn script engine with specified arguments.
+        engine = factory.getScriptEngine(args.toArray(new String[args.size()]));
+
+        // Load initial scripts.
+        for (String path : paths) {
+            load(path);
+        }
+
+        // Invoke users JavaScript init function if present.
+        try {
+            ((Invocable) engine).invokeFunction("init");
+        } catch (NoSuchMethodException ex) {
+            // Presence of init is optional.
+        }
+    }
+
+    @Override
+    public void start(Stage stage) throws Exception {
+        // Invoke users JavaScript start function if present.
+        try {
+            ((Invocable) engine).invokeFunction("start", stage);
+        } catch (NoSuchMethodException ex) {
+            // Presence of start is optional.
+        }
+    }
+
+    @Override
+    public void stop() throws Exception {
+        // Invoke users JavaScript stop function if present.
+        try {
+            ((Invocable) engine).invokeFunction("stop");
+        } catch (NoSuchMethodException ex) {
+            // Presence of stop is optional.
+        }
+    }
+
+    /**
+     * Load and evaluate the specified JavaScript file.
+     *
+     * @param path Path to UTF-8 encoded JavaScript file.
+     *
+     * @return Last evalulation result (discarded.)
+     */
+    private Object load(String path) {
+        try {
+            FileInputStream file = new FileInputStream(path);
+            InputStreamReader input = new InputStreamReader(file, "UTF-8");
+            return engine.eval(input);
+        } catch (FileNotFoundException | UnsupportedEncodingException | ScriptException ex) {
+            ex.printStackTrace();
+        }
+
+        return null;
+    }
+}