/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

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

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 */

package com.oracle.solaris.vp.panel.swing.smf;

import java.awt.*;

import java.beans.*;

import java.io.IOException;

import javax.swing.*;

import com.oracle.solaris.scf.common.ScfException;

import com.oracle.solaris.vp.panel.common.api.smf_old.*;

import com.oracle.solaris.vp.panel.common.smf.*;

import com.oracle.solaris.vp.util.misc.finder.Finder;

import com.oracle.solaris.vp.util.swing.SettingsPanel;

@SuppressWarnings({"serial"})

public class SmfLogPanel extends SettingsPanel {

    //

    // Instance data

    //

    private JTextArea field;

    private ServiceTracker tracker;

    private PropertyChangeListener serviceListener =

	new PropertyChangeListener() {

	    @Override

	    public void propertyChange(PropertyChangeEvent event) {

		updateContentOnEventThread();

	    }

	};

    //

    // Constructors

    //

    public SmfLogPanel() {

	field = new JTextArea() {

	    @Override

	    public Dimension getPreferredScrollableViewportSize() {

		FontMetrics metrics = getFontMetrics(

		    getFont().deriveFont(Font.BOLD));

		Dimension d = super.getPreferredScrollableViewportSize();

		// Set scroll pane size (20 lines heigh, 20 characters wide)

		d.height = Math.min(20 * metrics.getHeight(), d.height);

		d.width = Math.min(20 * metrics.charWidth('e'), d.width);

		return d;

	    }

	};

	field.setEditable(false);

	field.setLineWrap(false);

	field.setBackground(Color.white);

	setContent(new JScrollPane(field), false, false);

    }

    //

    // SmfLogPanel methods

    //

    public void init(ServiceTracker tracker)

	if (this.tracker != tracker) {

	    if (this.tracker != null) {

		this.tracker.removePropertyChangeListener(

		    ServiceTracker.PROPERTY_SERVICE, serviceListener);

	    }

	    this.tracker = tracker;

	    if (tracker != null) {

		tracker.addPropertyChangeListener(

		    ServiceTracker.PROPERTY_SERVICE, serviceListener);

	    }

	    updateContentOnEventThread();

	}

    }

    //

    // Private methods

    //

    private void updateContent() {

	String content = null;

	if (tracker != null) {

	    try {

		// Limit to 1mb to not overwhelm network/memory

		LogInfo info = service.getLogInfo(1 << 20);

		byte[] bytes = info.getContents();

		content = new String(bytes);

		String resource = "service.log.contents";

		if (bytes.length < info.getSize()) {

		    resource += ".truncated";

		}

		content = Finder.getString(resource, info.getName(), content);

	    } catch (ScfException e) {

	    }

	}

	field.setText(content);

        field.scrollRectToVisible(new Rectangle(0,

	    field.getPreferredSize().height));

    }

    private void updateContentOnEventThread() {

	EventQueue.invokeLater(

	    new Runnable() {

		@Override

		public void run() {

		    updateContent();

		}

	    });

    }

}