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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.editor.view.media.operation;
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import java.util.Collections;
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import java.util.List;
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import java.util.Set;
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import org.eclipse.core.commands.ExecutionException;
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import org.eclipse.core.commands.operations.IUndoContext;
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import org.eclipse.core.runtime.IAdaptable;
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import org.eclipse.core.runtime.IProgressMonitor;
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import org.eclipse.core.runtime.IStatus;
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import eu.etaxonomy.cdm.model.description.DescriptionBase;
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import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
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import eu.etaxonomy.cdm.model.media.Media;
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import eu.etaxonomy.cdm.model.taxon.Taxon;
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import eu.etaxonomy.taxeditor.editor.l10n.Messages;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.operation.AbstractPostTaxonOperation;
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import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
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/**
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* <p>MoveMediaInListOperation class.</p>
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*
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* @author p.ciardelli
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* @created 05.02.2009
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*/
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public class MoveMediaInListOperation extends AbstractPostTaxonOperation {
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/** Constant <code>UP=1</code> */
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public static final int UP = -1;
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/** Constant <code>DOWN=-1</code> */
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public static final int DOWN = 1;
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private DescriptionBase<?> description;
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private Media media;
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private int direction;
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/**
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* <p>Constructor for MoveMediaInListOperation.</p>
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*
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* @param undoContext a {@link org.eclipse.core.commands.operations.IUndoContext} object.
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* @param taxon a {@link eu.etaxonomy.cdm.model.taxon.Taxon} object.
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* @param label a {@link java.lang.String} object.
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* @param description a {@link eu.etaxonomy.cdm.model.description.DescriptionBase} object.
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* @param media a {@link eu.etaxonomy.cdm.model.media.Media} object.
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* @param direction a int.
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* @param postOperationEnabled a {@link eu.etaxonomy.taxeditor.operation.IPostOperationEnabled} object.
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*/
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public MoveMediaInListOperation(String label, IUndoContext undoContext,
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Taxon taxon, DescriptionBase description, Media media,
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int direction, IPostOperationEnabled postOperationEnabled) {
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super(label, undoContext, taxon, postOperationEnabled);
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this.description = description;
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this.media = media;
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this.direction = direction;
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}
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@Override
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public IStatus execute(IProgressMonitor monitor, IAdaptable info)
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throws ExecutionException {
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monitor.worked(20);
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moveMedia(description, media, direction);
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monitor.worked(40);
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return postExecute(media);
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}
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@Override
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public IStatus redo(IProgressMonitor monitor, IAdaptable info)
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throws ExecutionException {
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return execute(monitor, info);
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}
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@Override
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public IStatus undo(IProgressMonitor monitor, IAdaptable info)
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throws ExecutionException {
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moveMedia(description, media, direction * -1);
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return postExecute(media);
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}
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private void moveMedia(DescriptionBase<?> description, Media media, int direction){
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Set<DescriptionElementBase> elements = description.getElements();
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if(elements.size() != 1){
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MessagingUtils.error(this.getClass(), Messages.MoveMediaInListOperation_MORE_DESC, null);
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}
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DescriptionElementBase element = elements.iterator().next();
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List<Media> medias = element.getMedia();
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int index = medias.indexOf(media);
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int newIndex = index + direction;
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if(index < 0){
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return;
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}
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if (newIndex >= 0 && newIndex < medias.size()) {
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try{
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Collections.swap(medias, newIndex, index);
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}catch(ArrayIndexOutOfBoundsException e){
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MessagingUtils.error(this.getClass(), e);
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}
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}
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}
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}
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