EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.editor.view.concept.e4;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import java.util.Map.Entry;

import javax.annotation.PostConstruct;

import org.eclipse.e4.ui.model.application.ui.basic.MPart;

import org.eclipse.e4.ui.services.EMenuService;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ListViewer;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.ViewerSorter;

import org.eclipse.swt.widgets.Composite;

import eu.etaxonomy.cdm.model.taxon.Taxon;

import eu.etaxonomy.cdm.model.taxon.TaxonRelationship;

import eu.etaxonomy.taxeditor.editor.key.e4.AbstractGraphKeyEditorE4;

import eu.etaxonomy.taxeditor.editor.l10n.Messages;

import eu.etaxonomy.taxeditor.editor.view.concept.ConceptContentProvider;

import eu.etaxonomy.taxeditor.editor.view.concept.ConceptLabelProvider;

import eu.etaxonomy.taxeditor.editor.view.descriptive.e4.FactualDataPartE4;

import eu.etaxonomy.taxeditor.editor.view.media.e4.MediaViewPartE4;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;

import eu.etaxonomy.taxeditor.view.e4.AbstractCdmEditorPart;

import eu.etaxonomy.taxeditor.view.e4.details.DetailsPartE4;

import eu.etaxonomy.taxeditor.view.e4.supplementaldata.SupplementalDataPartE4;

/**

 *

 * @author pplitzner

 * @date 21.08.2017

 *

 */

public class ConceptViewPartE4 extends AbstractCdmEditorPart

implements IPartContentHasDetails, IPartContentHasSupplementalData{

    @Override

    public void selectionChanged_internal(Object selection, MPart activePart, MPart thisPart) {

        if(activePart==thisPart){

            return;

        }

        if (!viewer.getControl().isDisposed()){

            viewer.getControl().setEnabled(true);

        }

        Object partObject = getPartObject(activePart);

        IStructuredSelection structuredSelection = createSelection(selection);

        if (partObject instanceof DetailsPartE4 || partObject instanceof SupplementalDataPartE4

                || partObject instanceof FactualDataPartE4|| partObject instanceof MediaViewPartE4) {

            // do not show empty page as these views are also used to edit the

            // description selected in this view

            return;

        }

		else if(partObject instanceof AbstractGraphKeyEditorE4){

			showEmptyPage();

		}

		else if(selection!=null){

		    showViewer(structuredSelection, activePart, viewer);

		}

		else {

		    showEmptyPage();

		}

	}

	@PostConstruct

    public void create(Composite parent, EMenuService menuService, MPart thisPart) {

	    this.thisPart = thisPart;

	    ConceptRelationViewer conceptViewer = new ConceptRelationViewer(parent);

	    conceptViewer.setContentProvider(new ConceptContentProvider());

	    conceptViewer.setLabelProvider(new ConceptLabelProvider());

	    conceptViewer.setSorter(new ViewerSorter());

		viewer = conceptViewer;

		// Propagate selection from viewer

        selectionChangedListener = (event -> selService.setSelection(viewer.getSelection()));

        viewer.addSelectionChangedListener(selectionChangedListener);

        //create context menu

        menuService.registerContextMenu(viewer.getControl(), "eu.etaxonomy.taxeditor.editor.popupmenu.conceptview");

	}

	@Override

	public void changed(Object object) {

		getViewer().refresh();

		super.changed(object);

	}

	private class ConceptRelationViewer extends ListViewer {

		public ConceptRelationViewer(Composite parent) {

			super(parent);

		}

		@Override

		public ISelection getSelection() {

			ISelection selection = super.getSelection();

			List<TaxonRelationship> relationships = new ArrayList<>();

			if(selection instanceof IStructuredSelection && !selection.isEmpty()){

			    for(Iterator iter = ((IStructuredSelection) selection).iterator();iter.hasNext();){

			        Object object = iter.next();

			        relationships.add(((Entry<TaxonRelationship, Taxon>)object).getKey());

			    }

			    return new StructuredSelection(relationships);

			}

			return selection;

		}

		@Override

		public void setSelection(ISelection selection) {

			super.setSelection(selection);

		}

	}

	@Override

	protected String getViewName() {

		return Messages.ConceptViewPart_VIEWER_NAME;

	}

}