/*******************************************************************************
 * Copyright (c) 2010 Oak Ridge National Laboratory.
 * 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.csstudio.ui.util.swt.stringtable;

import java.util.List;

import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.widgets.Table;

/** Editor for table with List<String>
 *  @author Kay Kasemir
 *  @author Xihui Chen
 */
class StringColumnEditor extends EditingSupport
{
	final private TableViewer table_viewer;

    public StringColumnEditor(final TableViewer viewer)
	{
		super(viewer);
		this.table_viewer = viewer;
	}

	@Override
	protected boolean canEdit(final Object element)
	{
		return true;
	}

	@Override
	protected CellEditor getCellEditor(final Object element)
	{
		final Table parent = (Table) getViewer().getControl();
		return new TextCellEditor(parent);
	}

	@Override
	protected Object getValue(Object element)
	{
		if (element == StringTableContentProvider.ADD_ELEMENT)
			return ""; //$NON-NLS-1$
		final int index = ((Integer)element).intValue();

		@SuppressWarnings("unchecked") final List<String> items =
				(List<String>) table_viewer.getInput();
		return items.get(index);
	}

	@Override
	protected void setValue(Object element, Object value)
	{
		@SuppressWarnings("unchecked") final List<String> items =
				(List<String>) table_viewer.getInput();
		if (element == StringTableContentProvider.ADD_ELEMENT)
		{
			items.add(value.toString());
			getViewer().refresh();
			return;
		}
		// else
		final int index = ((Integer)element).intValue();
		items.set(index, value.toString());
		getViewer().refresh(element);
	}
}