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/*******************************************************************************
 * Copyright (c) 2004, 2008 John Krasnay and others.
 * 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
 *
 * Contributors:
 *     John Krasnay - initial API and implementation
 *******************************************************************************/
package org.eclipse.vex.ui.internal.handlers;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.vex.core.internal.css.CSS;
import org.eclipse.vex.core.internal.css.StyleSheet;
import org.eclipse.vex.core.internal.dom.Node;
import org.eclipse.vex.core.internal.layout.Box;
import org.eclipse.vex.core.internal.layout.TableRowBox;
import org.eclipse.vex.core.internal.widget.IBoxFilter;
import org.eclipse.vex.ui.internal.swt.VexWidget;

/**
 * Splits the nearest enclosing table row or list item (usually by hitting {@code Shift+Return}). If a table row is
 * being split, empty versions of the current row's cells are created.
 * 
 * @see SplitBlockElementHandler
 */
public class SplitItemHandler extends SplitBlockElementHandler {

	@Override
	public void execute(final VexWidget widget) throws ExecutionException {
		final StyleSheet ss = widget.getStyleSheet();

		// Item is either a TableRowBox or a BlockElementBox representing
		// a list item
		final Box item = widget.findInnermostBox(new IBoxFilter() {
			public boolean matches(final Box box) {
				if (box instanceof TableRowBox) {
					return true;
				} else {
					final Node node = box.getNode();
					return node != null && ss.getStyles(node).getDisplay().equals(CSS.LIST_ITEM);
				}
			}
		});

		if (item instanceof TableRowBox) {
			new AddRowBelowHandler().execute(widget);
			// VexHandlerUtil.duplicateTableRow(vexWidget, (TableRowBox) item);
		} else if (item != null) {
			splitElement(widget, item.getNode());
		}
	}

}

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