ConfigNavigator.java

/**
 * Copyright (c) 2014-2017 by the respective copyright holders.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.eclipse.smarthome.designer.ui.internal.views;

import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.smarthome.designer.core.config.ConfigurationFolderProvider;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.actions.ActionGroup;
import org.eclipse.ui.navigator.CommonNavigator;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author Kai Kreuzer - Initial contribution and API
 *
 */
public class ConfigNavigator extends CommonNavigator {

    private IResourceChangeListener changeListener;

    private final Logger logger = LoggerFactory.getLogger(ConfigNavigator.class);

    @Override
    protected Object getInitialInput() {
        changeListener = new IResourceChangeListener() {
            @Override
            public void resourceChanged(IResourceChangeEvent event) {
                Display.getDefault().asyncExec(new Runnable() {
                    @Override
                    public void run() {
                        getCommonViewer().refresh();
                    }
                });
            }
        };
        ResourcesPlugin.getWorkspace().addResourceChangeListener(changeListener);

        try {
            IFolder rootConfigurationFolder = ConfigurationFolderProvider.getRootConfigurationFolder();
            if (rootConfigurationFolder != null) {
                return rootConfigurationFolder.getProject();
            } else {
                return null;
            }
        } catch (Exception e) {
            logger.error("An error occurred while reading config project", e);
            return null;
        }
    }

    @Override
    protected ActionGroup createCommonActionGroup() {
        return new ConfigNavigatorActionGroup(getCommonViewer());
    }

    @Override
    public void dispose() {
        super.dispose();
        ResourcesPlugin.getWorkspace().removeResourceChangeListener(changeListener);
        changeListener = null;
    }
}