EDIT

// $Id$

/**

* 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;

import java.util.Map.Entry;

import org.eclipse.jface.action.GroupMarker;

import org.eclipse.jface.action.MenuManager;

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.Viewer;

import org.eclipse.jface.viewers.ViewerSorter;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Menu;

import org.eclipse.ui.IEditorInput;

import org.eclipse.ui.IEditorPart;

import org.eclipse.ui.IWorkbenchActionConstants;

import org.eclipse.ui.IWorkbenchPart;

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

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

import eu.etaxonomy.taxeditor.bulkeditor.BulkEditor;

import eu.etaxonomy.taxeditor.editor.Messages;

import eu.etaxonomy.taxeditor.editor.MultiPageTaxonEditor;

import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;

import eu.etaxonomy.taxeditor.editor.key.AbstractGraphKeyEditor;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;

import eu.etaxonomy.taxeditor.model.LineSelection;

import eu.etaxonomy.taxeditor.view.AbstractCdmEditorViewPart;

import eu.etaxonomy.taxeditor.view.detail.DetailsViewPart;

import eu.etaxonomy.taxeditor.view.supplementaldata.SupplementalDataViewPart;

/**

 * @author n.hoffmann

 * @created Jan 24, 2011

 * @version 1.0

 */

public class ConceptViewPart extends AbstractCdmEditorViewPart 

implements IPartContentHasDetails, IPartContentHasSupplementalData{

	public static final String ID = "eu.etaxonomy.taxeditor.editor.view.concept"; //$NON-NLS-1$

	private ConceptRelationViewer viewer;

	@Override

	protected void selectionChanged_internal(IWorkbenchPart part, ISelection selection) {

		if(part == this){

		    return;

		}

		if(AbstractUtility.getActiveEditor() == null){

			showEmptyPage();

			return;

		}

        if (part instanceof DetailsViewPart || part instanceof SupplementalDataViewPart) {

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

            // description selected in this view

            return;

        }

        else if(part instanceof BulkEditor && selection instanceof LineSelection){

			if(((LineSelection) selection).getFirstElement() instanceof Taxon){

				showViewer(part, (LineSelection) selection);

			}

			else{

				showEmptyPage();

			}

			return;

		}

		else if(part instanceof AbstractGraphKeyEditor){

			showEmptyPage();

			return;

		}

		else if(part instanceof MultiPageTaxonEditor){

			if(! part.equals(this.part)){

				IEditorInput input = ((IEditorPart) part).getEditorInput();

				showViewer(part, new StructuredSelection(input));

			}

		}

		else {

		    showEmptyPage();

		}

	}

	@Override

	protected String createPartTitle(Object selectedObject) {

		if(selectedObject instanceof TaxonEditorInput){

			return super.createPartTitle(((TaxonEditorInput) selectedObject).getTaxon());

		}

		return super.createPartTitle(selectedObject);

	}

	@Override

	public boolean onComplete() {

		return true;

	}

	@Override

	public Viewer getViewer() {

		return viewer;

	}

	@Override

	public void createViewer(Composite parent) {

		viewer = new ConceptRelationViewer(parent);

		viewer.setContentProvider(new ConceptContentProvider());

		viewer.setLabelProvider(new ConceptLabelProvider());

		viewer.setSorter(new ViewerSorter());

		getSite().setSelectionProvider(viewer);

		createMenu();

	}

	private void createMenu(){

		MenuManager menuManager = new MenuManager();

		menuManager.add(new GroupMarker(IWorkbenchActionConstants.MB_ADDITIONS));

		getSite().registerContextMenu(menuManager, viewer);

		Control control = viewer.getControl();

		Menu menu = menuManager.createContextMenu(control);

		control.setMenu(menu);

	}

	@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();

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

				Object firstElement = ((IStructuredSelection) selection).getFirstElement();

				TaxonRelationship taxonRelationship = ((Entry<TaxonRelationship, Taxon>)firstElement).getKey();

				return new StructuredSelection(taxonRelationship);

			}

			return selection;

		}

		@Override

		public void setSelection(ISelection selection) {

			super.setSelection(selection);

		}

	}

	@Override

	protected String getViewName() {

		return Messages.ConceptViewPart_VIEWER_NAME;

	}

}