/*******************************************************************************
 * Copyright (c) 2014 Bosch Software Innovations GmbH and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution.
 *
 * The Eclipse Public License is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * The Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 * Bosch Software Innovations GmbH - Please refer to git log
 *
 *******************************************************************************/
package org.eclipse.vorto.fbeditor.ui.internal.treeview;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Display;
import org.eclipse.vorto.api.ui.changeevent.ProjectChangeEvent;
import org.eclipse.vorto.api.ui.changeevent.IProjectChangeListener;


public class FBContentProvider implements ITreeContentProvider,
		IProjectChangeListener {
	TreeViewer treeViewer = null;

	@Override
	public void dispose() {

	}

	@Override
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		this.treeViewer = (TreeViewer) viewer;
	}

	/*
	 * @see IStructuredContentProvider#getElements(Object)
	 */
	public Object[] getElements(Object inputElement) {
		return getChildren(inputElement);
	}

	/*
	 * @see ITreeContentProvider#getChildren(Object)
	 */
	public Object[] getChildren(Object parentElement) {
		return new FunctionBlockScanner().readAllFunctionBlocksFromWorkspace()
				.toArray();
	}

	@Override
	public Object getParent(Object element) {
		return null;
	}

	@Override
	public boolean hasChildren(Object element) {
		return false;
	}

	@Override
	public void projectChanged(ProjectChangeEvent event) {

		final Object[] projects = new FunctionBlockScanner()
				.readAllFunctionBlocksFromWorkspace().toArray();

		Display.getDefault().syncExec(new Runnable() {
			public void run() {
				try {
					treeViewer.setInput(projects);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});

	}

}