InsertColumnBeforeAction.java

/*******************************************************************************
 * 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 net.sf.vex.action;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.sf.vex.dom.Element;
import net.sf.vex.widget.IVexWidget;

/**
 * Inserts a single table column before the current one.
 */
public class InsertColumnBeforeAction extends AbstractVexAction {

    public void run(final IVexWidget vexWidget) {
        
        vexWidget.doWork(new Runnable() {
            public void run() {
                
                final int indexToDup = ActionUtils.getCurrentColumnIndex(vexWidget);
                if (indexToDup == -1) {
                    return;
                }
                
                final List cellsToDup = new ArrayList();
                ActionUtils.iterateTableCells(vexWidget, new TableCellCallback() {
                    public void startRow(Object row, int rowIndex) {
                    }
                    public void onCell(Object row, Object cell, int rowIndex, int cellIndex) {
                        if (cellIndex == indexToDup && cell instanceof Element) {
                            cellsToDup.add(cell);
                        }
                    }
                    public void endRow(Object row, int rowIndex) {
                    }
                });
                
                int finalOffset = -1;
                for (Iterator it = cellsToDup.iterator(); it.hasNext();) {
                    Element element = (Element) it.next();
                    if (finalOffset == -1) {
                        finalOffset = element.getStartOffset() + 1;
                    }
                    vexWidget.moveTo(element.getStartOffset());
                    vexWidget.insertElement((Element) element.clone());
                }
                
                if (finalOffset != -1) {
                    vexWidget.moveTo(finalOffset);
                }

            }
        });
        
    }

    public boolean isEnabled(IVexWidget vexWidget) {
        return ActionUtils.getCurrentColumnIndex(vexWidget) != -1;
    }

}