org.netxms.ui.eclipse.widgets.TextConsole.java Source code

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Here is the source code for org.netxms.ui.eclipse.widgets.TextConsole.java

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/**
 * NetXMS - open source network management system
 * Copyright (C) 2003-2014 Victor Kirhenshtein
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package org.netxms.ui.eclipse.widgets;

import java.io.IOException;
import java.io.OutputStream;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;

/**
 * Generic text console widget
 */
public class TextConsole extends Composite {
    private StyledText console;
    private boolean autoScroll = true;

    /**
     * @param parent
     * @param style
     */
    public TextConsole(Composite parent, int style) {
        super(parent, style);
        setLayout(new FillLayout());
        console = new StyledText(this, SWT.H_SCROLL | SWT.V_SCROLL);
        console.setFont(JFaceResources.getTextFont());
        console.setScrollOnAppend(autoScroll);
    }

    /**
     * Add listener for console selection change
     * 
     * @param listener
     */
    public void addSelectionChangedListener(ISelectionChangedListener listener) {
    }

    /**
     * Check if copy operation is allowed
     * 
     * @return
     */
    public boolean canCopy() {
        return false;
    }

    /**
     * Copy selection to clipboard
     */
    public void copy() {
    }

    /**
     * Clear console
     */
    public void clear() {
        console.setText("");
    }

    /**
     * Select all
     */
    public void selectAll() {
    }

    /**
     * @param autoScroll
     */
    public void setAutoScroll(boolean autoScroll) {
        this.autoScroll = autoScroll;
        console.setScrollOnAppend(autoScroll);
    }

    /**
     * Create new output stream attached to underlying console.
     * 
     * @return
     */
    public IOConsoleOutputStream newOutputStream() {
        return new IOConsoleOutputStream();
    }

    /**
     * Console output stream implementation
     */
    public class IOConsoleOutputStream extends OutputStream {
        /* (non-Javadoc)
         * @see java.io.OutputStream#write(int)
         */
        @Override
        public void write(int b) throws IOException {
            write(new byte[] { (byte) b }, 0, 1);
        }

        /* (non-Javadoc)
         * @see java.io.OutputStream#write(byte[])
         */
        @Override
        public void write(byte[] b) throws IOException {
            write(b, 0, b.length);
        }

        /* (non-Javadoc)
         * @see java.io.OutputStream#write(byte[], int, int)
         */
        @Override
        public void write(byte[] b, int off, int len) throws IOException {
            write(new String(b, off, len));
        }

        /**
         * Write string to console
         * 
         * @param s
         * @throws IOException
         */
        public synchronized void write(final String s) throws IOException {
            getDisplay().asyncExec(new Runnable() {
                @Override
                public void run() {
                    console.append(s);
                }
            });
        }
    }
}