/*

 * Copyright 2008 Sun Microsystems, Inc.  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.

 *

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

package com.sun.hotspot.igv.bytecodes;

import com.sun.hotspot.igv.data.Group;

import com.sun.hotspot.igv.data.InputGraph;

import com.sun.hotspot.igv.data.services.InputGraphProvider;

import java.awt.BorderLayout;

import java.io.Serializable;

import org.openide.ErrorManager;

import org.openide.explorer.ExplorerManager;

import org.openide.explorer.ExplorerUtils;

import org.openide.explorer.view.BeanTreeView;

import org.openide.util.Lookup;

import org.openide.util.LookupEvent;

import org.openide.util.LookupListener;

import org.openide.util.NbBundle;

import org.openide.util.Utilities;

import org.openide.windows.TopComponent;

import org.openide.windows.WindowManager;

/**

 * @author Thomas Wuerthinger

 */

final class BytecodeViewTopComponent extends TopComponent implements ExplorerManager.Provider, LookupListener {

    private static BytecodeViewTopComponent instance;

    private static final String PREFERRED_ID = "BytecodeViewTopComponent";

    private ExplorerManager manager;

    private BeanTreeView treeView;

    private Lookup.Result result = null;

    private MethodNode rootNode;

    private BytecodeViewTopComponent() {

        initComponents();

        setName(NbBundle.getMessage(BytecodeViewTopComponent.class, "CTL_BytecodeViewTopComponent"));

        setToolTipText(NbBundle.getMessage(BytecodeViewTopComponent.class, "HINT_BytecodeViewTopComponent"));

        manager = new ExplorerManager();

        rootNode = new MethodNode(null, null, "");

        manager.setRootContext(rootNode);

        setLayout(new BorderLayout());

        treeView = new BeanTreeView();

        treeView.setRootVisible(false);

        this.add(BorderLayout.CENTER, treeView);

        associateLookup(ExplorerUtils.createLookup(manager, getActionMap()));

    }

    /** This method is called from within the constructor to

     * initialize the form.

     * WARNING: Do NOT modify this code. The content of this method is

     * always regenerated by the Form Editor.

     */

    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents

    private void initComponents() {

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);

        this.setLayout(layout);

        layout.setHorizontalGroup(

            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)

            .add(0, 400, Short.MAX_VALUE)

        );

        layout.setVerticalGroup(

            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)

            .add(0, 300, Short.MAX_VALUE)

        );

    }// </editor-fold>//GEN-END:initComponents

    // Variables declaration - do not modify//GEN-BEGIN:variables

    // End of variables declaration//GEN-END:variables

    /**

     * Gets default instance. Do not use directly: reserved for *.settings files only,

     * i.e. deserialization routines; otherwise you could get a non-deserialized instance.

     * To obtain the singleton instance, use {@link findInstance}.

     */

    public static synchronized BytecodeViewTopComponent getDefault() {

        if (instance == null) {

            instance = new BytecodeViewTopComponent();

        }

        return instance;

    }

    /**

     * Obtain the BytecodeViewTopComponent instance. Never call {@link #getDefault} directly!

     */

    public static synchronized BytecodeViewTopComponent findInstance() {

        TopComponent win = WindowManager.getDefault().findTopComponent(PREFERRED_ID);

        if (win == null) {

            ErrorManager.getDefault().log(ErrorManager.WARNING, "Cannot find BytecodeView component. It will not be located properly in the window system.");

            return getDefault();

        }

        if (win instanceof BytecodeViewTopComponent) {

            return (BytecodeViewTopComponent) win;

        }

        ErrorManager.getDefault().log(ErrorManager.WARNING, "There seem to be multiple components with the '" + PREFERRED_ID + "' ID. That is a potential source of errors and unexpected behavior.");

        return getDefault();

    }

    @Override

    public int getPersistenceType() {

        return TopComponent.PERSISTENCE_ALWAYS;

    }

    @Override

    public void componentOpened() {

        Lookup.Template tpl = new Lookup.Template(Object.class);

        result = Utilities.actionsGlobalContext().lookup(tpl);

        result.addLookupListener(this);

    }

    @Override

    public void componentClosed() {

        result.removeLookupListener(this);

        result = null;

    }

    @Override

    public Object writeReplace() {

        return new ResolvableHelper();

    }

    @Override

    protected String preferredID() {

        return PREFERRED_ID;

    }

    public ExplorerManager getExplorerManager() {

        return manager;

    }

    public void resultChanged(LookupEvent lookupEvent) {

        InputGraphProvider p = Lookup.getDefault().lookup(InputGraphProvider.class);

        if (p != null) {

            InputGraph graph = p.getGraph();

            if (graph != null) {

                Group g = graph.getGroup();

                rootNode.update(graph, g.getMethod());

            }

        }

    }

    final static class ResolvableHelper implements Serializable {

        private static final long serialVersionUID = 1L;

        public Object readResolve() {

            return BytecodeViewTopComponent.getDefault();

        }

    }

}