/**
* Copyright 2004-2016 Riccardo Solmi. All rights reserved.
* This file is part of the Whole Platform.
*
* The Whole Platform is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Whole Platform is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
*/
package org.whole.lang.ui.commands;
import org.whole.lang.parsers.DataTypeParsers;
import org.whole.lang.ui.editparts.ITextualEntityPart;
import org.whole.lang.ui.util.CaretUpdater;
import org.whole.lang.util.DataTypeUtils;
/**
* @author Enrico Persiani
*/
public class BackspaceTextCommand extends AbstractTextCommand {
private int length;
public BackspaceTextCommand() {
super(TextCommandTypes.DELETE);
}
@Override
public boolean canExecute() {
return length > 0 && getSourcePart().getCaretPosition() >= length;
}
public void execute() {
ITextualEntityPart caretPart = getSourcePart();
int end = caretPart.getCaretPosition();
int start = end - length;
this.initialRange = new Range(start, end);
String value = DataTypeUtils.getAsPresentationString(entity);
value = value.substring(0, start) + value.substring(end);
this.finalRange = new Range(start, start);
setNewValue(DataTypeUtils.getDataTypeParser(entity, DataTypeParsers.PRESENTATION).parse(entity.wGetEntityDescriptor(), value));
CaretUpdater.createCU(getViewer(), entity, start).sheduleSyncUpdate();
super.execute();
}
public void setLength(int length) {
this.length = length;
}
}