1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/boot/src/main/java/org/netbeans/html/boot/impl/FnContext.java	Mon Dec 16 16:59:43 2013 +0100
     1.3 @@ -0,0 +1,98 @@
     1.4 +/**
     1.5 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
     1.6 + *
     1.7 + * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
     1.8 + *
     1.9 + * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
    1.10 + * Other names may be trademarks of their respective owners.
    1.11 + *
    1.12 + * The contents of this file are subject to the terms of either the GNU
    1.13 + * General Public License Version 2 only ("GPL") or the Common
    1.14 + * Development and Distribution License("CDDL") (collectively, the
    1.15 + * "License"). You may not use this file except in compliance with the
    1.16 + * License. You can obtain a copy of the License at
    1.17 + * http://www.netbeans.org/cddl-gplv2.html
    1.18 + * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
    1.19 + * specific language governing permissions and limitations under the
    1.20 + * License.  When distributing the software, include this License Header
    1.21 + * Notice in each file and include the License file at
    1.22 + * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this
    1.23 + * particular file as subject to the "Classpath" exception as provided
    1.24 + * by Oracle in the GPL Version 2 section of the License file that
    1.25 + * accompanied this code. If applicable, add the following below the
    1.26 + * License Header, with the fields enclosed by brackets [] replaced by
    1.27 + * your own identifying information:
    1.28 + * "Portions Copyrighted [year] [name of copyright owner]"
    1.29 + *
    1.30 + * Contributor(s):
    1.31 + *
    1.32 + * The Original Software is NetBeans. The Initial Developer of the Original
    1.33 + * Software is Oracle. Portions Copyright 2013-2013 Oracle. All Rights Reserved.
    1.34 + *
    1.35 + * If you wish your version of this file to be governed by only the CDDL
    1.36 + * or only the GPL Version 2, indicate your decision by adding
    1.37 + * "[Contributor] elects to include this software in this distribution
    1.38 + * under the [CDDL or GPL Version 2] license." If you do not indicate a
    1.39 + * single choice of license, a recipient has the option to distribute
    1.40 + * your version of this file under either the CDDL, the GPL Version 2 or
    1.41 + * to extend the choice of license to its licensees as provided above.
    1.42 + * However, if you add GPL Version 2 code and therefore, elected the GPL
    1.43 + * Version 2 license, then the option applies only if the new code is
    1.44 + * made subject to such option by the copyright holder.
    1.45 + */
    1.46 +package org.netbeans.html.boot.impl;
    1.47 +
    1.48 +import java.io.Closeable;
    1.49 +import java.io.IOException;
    1.50 +import java.util.logging.Logger;
    1.51 +import org.apidesign.html.boot.spi.Fn;
    1.52 +
    1.53 +/**
    1.54 + *
    1.55 + * @author Jaroslav Tulach <jtulach@netbeans.org>
    1.56 + */
    1.57 +public final class FnContext implements Closeable {
    1.58 +    private static final Logger LOG = Logger.getLogger(FnContext.class.getName());
    1.59 +
    1.60 +    private Object prev;
    1.61 +    private FnContext(Fn.Presenter p) {
    1.62 +        this.prev = p;
    1.63 +    }
    1.64 +
    1.65 +    @Override
    1.66 +    public void close() throws IOException {
    1.67 +        if (prev != this) {
    1.68 +            currentPresenter((Fn.Presenter)prev);
    1.69 +            prev = this;
    1.70 +        }
    1.71 +    }
    1.72 +/*
    1.73 +    @Override
    1.74 +    protected void finalize() throws Throwable {
    1.75 +        if (prev != null) {
    1.76 +            LOG.warning("Unclosed context!");
    1.77 +        }
    1.78 +    }
    1.79 +*/
    1.80 +    public static Closeable activate(Fn.Presenter newP) {
    1.81 +        return new FnContext(currentPresenter(newP));
    1.82 +    }
    1.83 +    
    1.84 +    
    1.85 +    private static final ThreadLocal<Fn.Presenter> CURRENT = new ThreadLocal<Fn.Presenter>();
    1.86 +
    1.87 +    public static Fn.Presenter currentPresenter(Fn.Presenter p) {
    1.88 +        Fn.Presenter prev = CURRENT.get();
    1.89 +        CURRENT.set(p);
    1.90 +        return prev;
    1.91 +    }
    1.92 +
    1.93 +    public static Fn.Presenter currentPresenter() {
    1.94 +        Fn.Presenter p = CURRENT.get();
    1.95 +        if (p == null) {
    1.96 +            throw new IllegalStateException("No current WebView context around!");
    1.97 +        }
    1.98 +        return p;
    1.99 +    }
   1.100 +    
   1.101 +}