/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * Oracle and Java are registered trademarks of Oracle and/or its affiliates.
 * Other names may be trademarks of their respective owners.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common
 * 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
 * specific language governing permissions and limitations under the
 * License.  When distributing the software, include this License Header
 * Notice in each file and include the License file at
 * nbbuild/licenses/CDDL-GPL-2-CP.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the GPL Version 2 section of the License file that
 * accompanied this code. If applicable, add the following below the
 * License Header, with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 *
 * Contributor(s):
 *
 * The Original Software is NetBeans. The Initial Developer of the Original
 * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun
 * Microsystems, Inc. All Rights Reserved.
 *
 * If you wish your version of this file to be governed by only the CDDL
 * or only the GPL Version 2, indicate your decision by adding
 * "[Contributor] elects to include this software in this distribution
 * under the [CDDL or GPL Version 2] license." If you do not indicate a
 * single choice of license, a recipient has the option to distribute
 * your version of this file under either the CDDL, the GPL Version 2 or
 * to extend the choice of license to its licensees as provided above.
 * However, if you add GPL Version 2 code and therefore, elected the GPL
 * Version 2 license, then the option applies only if the new code is
 * made subject to such option by the copyright holder.
 */
package org.netbeans.modules.java.editor.codegen;

import com.sun.source.util.TreePath;
import java.io.IOException;
import javax.swing.text.JTextComponent;
import org.netbeans.api.java.source.CompilationController;
import org.netbeans.api.java.source.JavaSource;
import org.netbeans.spi.editor.codegen.CodeGeneratorContextProvider;
import org.openide.util.Lookup;
import org.openide.util.lookup.Lookups;
import org.openide.util.lookup.ProxyLookup;

/**
 *
 * @author Dusan Balek
 */
public class ContextProvider implements CodeGeneratorContextProvider {

    public void runTaskWithinContext(final Lookup context, final Task task) {
        JTextComponent component = context.lookup(JTextComponent.class);
        if (component != null) {
            try {
                JavaSource js = JavaSource.forDocument(component.getDocument());
                if (js != null) {
                    final int caretOffset = component.getCaretPosition();
                    js.runUserActionTask(new org.netbeans.api.java.source.Task<CompilationController>() {
                        public void run(CompilationController controller) throws Exception {
                            controller.toPhase(JavaSource.Phase.PARSED);
                            TreePath path = controller.getTreeUtilities().pathFor(caretOffset);
                            Lookup newContext = new ProxyLookup(context, Lookups.fixed(controller, path));
                            task.run(newContext);
                        }
                    }, true);
                    return;
                }
            } catch (IOException ioe) {
            }
        }
        task.run(context);
    }
}
