/*******************************************************************************
* Copyright (c) 2010, 2014 itemis AG 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:
* itemis AG - initial API and implementation
* E.D.Willink - integration of XTFO code uder CQ 4866
*******************************************************************************/
package org.eclipse.ocl.examples.xtext.console.xtfo;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.text.ITextOperationTarget;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.ui.texteditor.IUpdate;
class TextViewerAction extends Action implements IUpdate {
private int fOperationCode= -1;
private ITextOperationTarget fOperationTarget;
/**
* Creates a new action.
*
* @param viewer the viewer
* @param operationCode the opcode
*/
public TextViewerAction(ITextViewer viewer, int operationCode) {
fOperationCode = operationCode;
fOperationTarget = viewer.getTextOperationTarget();
update();
}
/**
* Updates the enabled state of the action.
* Fires a property change if the enabled state changes.
*
* @see Action#firePropertyChange(String, Object, Object)
*/
@Override
public void update() {
boolean wasEnabled = isEnabled();
boolean isEnabled = (fOperationTarget != null && fOperationTarget.canDoOperation(fOperationCode));
setEnabled(isEnabled);
if (wasEnabled != isEnabled) {
firePropertyChange(ENABLED, wasEnabled ? Boolean.TRUE : Boolean.FALSE, isEnabled ? Boolean.TRUE : Boolean.FALSE);
}
}
/**
* @see Action#run()
*/
@Override
public void run() {
if (fOperationCode != -1 && fOperationTarget != null) {
fOperationTarget.doOperation(fOperationCode);
}
}
}