org.jboss.tools.aesh.ui.view.AbstractTextViewer.java Source code

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Here is the source code for org.jboss.tools.aesh.ui.view.AbstractTextViewer.java

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/**
 * Copyright (c) Red Hat, Inc., contributors and others 2013 - 2014. All rights reserved
 *
 * Licensed under the Eclipse Public License version 1.0, available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.jboss.tools.aesh.ui.view;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.TextViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.VerifyEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.jboss.tools.aesh.core.console.Console;
import org.jboss.tools.aesh.ui.internal.document.DocumentImpl;
import org.jboss.tools.aesh.ui.internal.util.FontManager;
import org.jboss.tools.aesh.ui.internal.viewer.CursorListenerImpl;
import org.jboss.tools.aesh.ui.internal.viewer.DocumentListenerImpl;
import org.jboss.tools.aesh.ui.internal.viewer.TextWidget;
import org.jboss.tools.aesh.ui.internal.viewer.VerifyKeyListenerImpl;

public abstract class AbstractTextViewer extends TextViewer {

    Console console;
    DocumentImpl document;
    TextWidget textWidget;

    public AbstractTextViewer(Composite parent) {
        super(parent, SWT.WRAP | SWT.V_SCROLL | SWT.H_SCROLL);
        initialize();
    }

    public AbstractTextViewer(Composite parent, int styles) {
        super(parent, styles);
        initialize();
    }

    public void startConsole() {
        Display.getDefault().syncExec(new Runnable() {
            @Override
            public void run() {
                console.connect(document);
                setDocument(document.getDelegate());
                console.start();
            }
        });
    }

    public void stopConsole() {
        Display.getDefault().syncExec(new Runnable() {
            @Override
            public void run() {
                console.stop();
                console.disconnect();
                document.reset();
                setDocument(null);
            }
        });
    }

    protected abstract Console createConsole();

    protected StyledText createTextWidget(Composite parent, int styles) {
        textWidget = new TextWidget(parent, styles);
        return textWidget;
    }

    protected void handleVerifyEvent(VerifyEvent e) {
        console.sendInput(e.text);
        e.doit = false;
    }

    private void initialize() {
        initializeConsole();
        initializeDocument();
        initializeTextWidget();
    }

    private void initializeConsole() {
        console = createConsole();
    }

    private void initializeDocument() {
        document = new DocumentImpl();
        document.setCursorListener(new CursorListenerImpl(textWidget, document));
        document.setDocumentListener(new DocumentListenerImpl(textWidget, document));
    }

    private void initializeTextWidget() {
        textWidget.setConsole(console);
        textWidget.setFont(JFaceResources.getFont(FontManager.AESH_CONSOLE_FONT));
        textWidget.addVerifyKeyListener(new VerifyKeyListenerImpl(console));
    }

}