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/*****************************************************************************
* Copyright (c) 2012 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.infra.gmfdiag.properties.databinding.custom;
import java.util.Collection;
import org.eclipse.core.databinding.observable.ChangeEvent;
import org.eclipse.core.databinding.observable.IChangeListener;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFProperties;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edit.domain.EditingDomain;
import org.eclipse.gmf.runtime.notation.NamedStyle;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.papyrus.infra.emf.databinding.EMFObservableList;
import org.eclipse.papyrus.infra.gmfdiag.common.listener.CustomStyleListener;
import org.eclipse.papyrus.infra.widgets.editors.AbstractEditor;
public class CustomStyleObservableList extends EMFObservableList implements IChangeListener {
protected EClass eClass;
protected EStructuralFeature feature;
protected String styleName;
protected View view;
protected EditingDomain domain;
protected CustomStyleListener listener;
protected boolean styleExists;
protected boolean changing = false;
//Equals to concreteList
protected IObservableList observableConcreteList;
// protected final List<?> transientList;
public CustomStyleObservableList(View view, String styleName, EditingDomain domain, EClass eClass, EStructuralFeature feature) {
super(getWrappedList(view, styleName, eClass, feature), domain, null, null);
this.eClass = eClass;
this.feature = feature;
this.styleName = styleName;
this.view = view;
this.domain = domain;
observableConcreteList = (IObservableList)concreteList;
styleExists = isStyleCreated();
view.eAdapters().add(listener = new CustomStyleListener(view, feature, this, styleName));
}
@Override
public void commit(AbstractEditor editor) {
changing = true;
super.commit(editor);
changing = false;
}
private boolean isStyleCreated() {
return view.getNamedStyle(eClass, styleName) != null;
}
private static IObservableList getWrappedList(View view, String styleName, EClass eClass, EStructuralFeature feature) {
NamedStyle style = view.getNamedStyle(eClass, styleName);
if(style != null) {
return EMFProperties.list(feature).observe(style);
}
//The style doesn't exist yet, we need to simulate it
//(With an empty list)
return new WritableList();
}
@Override
public Command getAddCommand(int index, Object value) {
return new AddCustomStyleListValueCommand(domain, view, styleName, eClass, feature, value, index);
}
@Override
public Command getAddCommand(Object value) {
return new AddCustomStyleListValueCommand(domain, view, styleName, eClass, feature, value);
}
@Override
public Command getAddAllCommand(Collection<?> values) {
return new AddAllCustomStyleListValueCommand(domain, view, styleName, eClass, feature, values);
}
@Override
public Command getAddAllCommand(int index, Collection<?> values) {
return new AddCustomStyleListValueCommand(domain, view, styleName, eClass, feature, values, index);
}
@Override
public Command getRemoveCommand(Object value) {
return new RemoveCustomStyleListValueCommand(domain, view, styleName, eClass, feature, value);
}
@Override
public Command getRemoveAllCommand(Collection<?> values) {
return new RemoveAllCustomStyleListValueCommand(domain, view, styleName, eClass, feature, values);
}
@Override
public Command getSetCommand(int index, Object value) {
return new SetCustomStyleListValueCommand(domain, view, styleName, eClass, feature, index, value);
}
public void handleChange(ChangeEvent event) {
//If the ListValueStyle has been created or removed, we need to resync
//the concrete list with it
if(styleExists != (styleExists = isStyleCreated())) {
observableConcreteList.dispose();
concreteList = observableConcreteList = getWrappedList(view, styleName, eClass, feature);
}
//If this observable is not the source of the change, the wrapped
//list should also be refreshed.
if(!changing) {
refreshCacheList();
}
}
@Override
public void dispose() {
view.eAdapters().remove(listener);
listener.dispose();
listener = null;
observableConcreteList.dispose();
super.dispose();
}
}
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