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  * Development and Distribution License("CDDL") (collectively, the

  * "License"). You may not use this file except in compliance with the

  * License. You can obtain a copy of the License at

  * http://www.netbeans.org/cddl-gplv2.html

  * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the

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  *

  * The Original Software is NetBeans. The Initial Developer of the Original

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 package net.java.html.boot.script;

 import java.io.Closeable;

 import java.util.concurrent.Executor;

 import javax.script.ScriptEngine;

 import net.java.html.boot.BrowserBuilder;

 import net.java.html.js.JavaScriptBody;

 import org.netbeans.html.boot.spi.Fn;

 import org.netbeans.html.boot.spi.Fn.Presenter;

 /** Implementations of {@link Presenter}s that delegate

  * to Java {@link ScriptEngine scripting} API. Initialize your presenter

  * like this:

  * 

  * <pre>

  * 

  * {@link Runnable} <em>run</em> = ...; // your own init code

  * {@link Presenter Fn.Presenter} <b>p</b> = Scripts.{@link Scripts#createPresenter()};

  * BrowserBuilder.{@link BrowserBuilder#newBrowser(java.lang.Object...) newBrowser(<b>p</b>)}.

  *      {@link BrowserBuilder#loadFinished(java.lang.Runnable) loadFinished(run)}.

  *      {@link BrowserBuilder#showAndWait()};

  * </pre>

  * 

  * and your runnable can make extensive use of {@link JavaScriptBody} directly or

  * indirectly via APIs using {@link JavaScriptBody such annotation} themselves.

  * <p>

  * Alternatively one can manipulate the presenter manually, which is

  * especially useful when writing tests:

  * <pre>

  * {@code @Test} public void runInASimulatedBrowser() throws Exception {

  *   {@link Presenter Fn.Presenter} <b>p</b> = Scripts.{@link Scripts#createPresenter()};

  *   try ({@link Closeable} c = {@link Fn#activate(org.netbeans.html.boot.spi.Fn.Presenter) Fn.activate}(<b>p</b>)) {

  *     // your code operating in context of <b>p</b>

  *   }

  * }

  * </pre>

  * The previous code snippet requires Java 7 language syntax, as it relies

  * on try-with-resources language syntactic sugar feature. The same block

  * of code can be used on older versions of Java, but it is slightly more

  * verbose.

  * 

  * @author Jaroslav Tulach

  */

 public final class Scripts {

     private Scripts() {

     }

     /** Simple implementation of {@link Presenter} that delegates

      * to Java {@link ScriptEngine scripting} API. The presenter runs headless

      * without appropriate simulation of browser APIs. Its primary usefulness

      * is inside testing environments. The presenter implements {@link Executor}

      * interface, but invokes all runnables passed to {@link Executor#execute(java.lang.Runnable)}

      * immediately.

      * 

      * @return new instance of a presenter that is using its own

      *   {@link ScriptEngine} for <code>text/javascript</code> mimetype

      */

     public static Presenter createPresenter() {

         return new ScriptPresenter(null);

     }

     /** Implementation of {@link Presenter} that delegates

      * to Java {@link ScriptEngine scripting} API and can control execution

      * thread. The presenter runs headless

      * without appropriate simulation of browser APIs. Its primary usefulness

      * is inside testing environments. The presenter implements {@link Executor}

      * interface, and passes all runnables from {@link Executor#execute(java.lang.Runnable)}

      * to here in provided <code>exc</code> instance.

      * 

      * @param exc the executor to re-schedule all asynchronous requests to

      * @return new instance of a presenter that is using its own

      *   {@link ScriptEngine} for <code>text/javascript</code> mimetype

      */

     public static Presenter createPresenter(Executor exc) {

         return new ScriptPresenter(exc);

     }

 }