DeleteColumnAction.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.List;

import net.sf.vex.core.IntRange;
import net.sf.vex.widget.IVexWidget;

/**
 * Delete the table column containing the caret.
 */
public class DeleteColumnAction extends AbstractVexAction {

    public void run(final IVexWidget vexWidget) {
        
        vexWidget.doWork(new Runnable() {
            public void run() {
                
                final ActionUtils.RowColumnInfo rcInfo = ActionUtils.getRowColumnInfo(vexWidget);
                
                if (rcInfo == null) {
                    return;
                }

                final List cellsToDelete = 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 == rcInfo.cellIndex) {
                            cellsToDelete.add(cell);
                        }
                    }
                    public void endRow(Object row, int rowIndex) {
                    }
                });

                // Iterate the deletions in reverse, so that we don't mess up
                // offsets that are in anonymous cells, which are not stored
                // as Positions.
                for (int i = cellsToDelete.size() - 1; i >= 0; i--) {
                    Object cell = cellsToDelete.get(i);
                    IntRange range = ActionUtils.getOuterRange(cell);
                    vexWidget.moveTo(range.getStart());
                    vexWidget.moveTo(range.getEnd(), true);
                    vexWidget.deleteSelection();
                }
            }
        });
        
    }

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

}