/*******************************************************************************
* <copyright>
*
* Copyright (c) 2012 Volker Wegert 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:
* Volker Wegert - initial API, implementation and documentation:
* Bug 336828: patterns should support delete,
* remove, direct editing and conditional palette
* creation entry
* mwenz - Bug 324859 - Need Undo/Redo support for Non-EMF based domain objects
* mwenz - Bug 325084 - Provide documentation for Patterns
*
* </copyright>
*
*******************************************************************************/
package org.eclipse.graphiti.pattern;
import org.eclipse.graphiti.features.ICustomUndoableFeature;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IContext;
import org.eclipse.graphiti.features.context.IDeleteContext;
import org.eclipse.graphiti.func.IDelete;
import org.eclipse.graphiti.ui.features.DefaultDeleteFeature;
/**
* This feature wraps the delete functionality of a pattern for calls of the
* Graphiti framework. Clients should not need to use this class directly.
*
* @noextend This class is not intended to be subclassed by clients.
* @noinstantiate This class is not intended to be instantiated by clients.
*
* @since 0.8.0
*/
public class DeleteFeatureForPattern extends DefaultDeleteFeature implements ICustomUndoableFeature {
private IFeatureForPattern delegate;
/**
* Creates a new {@link DeleteFeatureForPattern}.
*
* @param featureProvider
* the feature provider
* @param pattern
* the pattern
*/
public DeleteFeatureForPattern(IFeatureProvider featureProvider, IPattern pattern) {
super(featureProvider);
delegate = new FeatureForPatternDelegate(pattern);
}
@Override
public boolean canDelete(IDeleteContext context) {
return delegate.getPattern().canDelete(context);
}
@Override
public void preDelete(IDeleteContext context) {
delegate.getPattern().preDelete(context);
}
@Override
public void delete(IDeleteContext context) {
delegate.getPattern().delete(context);
}
@Override
public void postDelete(IDeleteContext context) {
delegate.getPattern().postDelete(context);
}
@Override
public boolean canUndo(IContext context) {
IPattern pattern = delegate.getPattern();
if (pattern instanceof ICustomUndoablePattern) {
return ((ICustomUndoablePattern) pattern).canUndo(this, context);
}
return super.canUndo(context);
}
public void undo(IContext context) {
IPattern pattern = delegate.getPattern();
if (pattern instanceof ICustomUndoablePattern) {
((ICustomUndoablePattern) pattern).undo(this, context);
}
}
public boolean canRedo(IContext context) {
IPattern pattern = delegate.getPattern();
if (pattern instanceof ICustomUndoablePattern) {
return ((ICustomUndoablePattern) pattern).canRedo(this, context);
}
return true;
}
public void redo(IContext context) {
IPattern pattern = delegate.getPattern();
if (pattern instanceof ICustomUndoablePattern) {
((ICustomUndoablePattern) pattern).redo(this, context);
}
}
@Override
public boolean hasDoneChanges() {
IPattern pattern = delegate.getPattern();
return pattern.hasDoneChanges(IDelete.class);
}
}