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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.common.databinding.custom;
import org.eclipse.emf.common.command.AbstractCommand;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.util.EList;
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.NotationFactory;
import org.eclipse.gmf.runtime.notation.View;
public abstract class AbstractCustomStyleListValueCommand extends AbstractCommand {
protected View view;
protected EClass styleClass;
protected String styleName;
protected boolean needsCreate;
protected EStructuralFeature styleFeature;
protected EditingDomain domain;
protected Command command;
protected NamedStyle style;
public AbstractCustomStyleListValueCommand(EditingDomain domain, View view, String styleName, EClass styleClass, EStructuralFeature styleFeature) {
this.view = view;
this.styleName = styleName;
this.styleClass = styleClass;
this.styleFeature = styleFeature;
this.domain = domain;
}
@Override
public void execute() {
// FIXME: Related to CompoundCommand vs StrictCompoundCommand.
// Sometimes, canExecute() is not called, and the command is not prepared
if (!isPrepared) {
prepare();
isPrepared = true;
}
if (needsCreate) {
view.getStyles().add(style);
}
command.execute();
}
@Override
public void redo() {
execute();
}
@Override
public boolean prepare() {
style = view.getNamedStyle(styleClass, styleName);
// The style may be volatile (generated by CSS). If it doesn't belong to the view, it will need to be attached.
if (needsCreate = (style == null)) {
style = (NamedStyle) NotationFactory.eINSTANCE.create(styleClass);
style.setName(styleName);
} else if (style.eResource() == null) {
needsCreate = true;
}
command = createCommand();
// return true;
return command.canExecute();
}
protected abstract Command createCommand();
@Override
public void undo() {
EList currentList = (EList) (style.eGet(styleFeature));
command.undo();
if (needsCreate) {
view.getStyles().remove(style);
}
}
}
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