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.media;

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.StructuredSelection;

import org.eclipse.jface.viewers.TreeNode;

import org.eclipse.jface.viewers.TreeViewer;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Menu;

import org.eclipse.swt.widgets.Tree;

import org.eclipse.ui.IWorkbenchActionConstants;

import org.eclipse.ui.IWorkbenchPart;

import eu.etaxonomy.cdm.model.description.IDescribable;

import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;

import eu.etaxonomy.taxeditor.bulkeditor.BulkEditor;

import eu.etaxonomy.taxeditor.editor.view.descriptive.DescriptiveViewPart;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.IPartContentHasDetails;

import eu.etaxonomy.taxeditor.model.IPartContentHasMedia;

import eu.etaxonomy.taxeditor.model.IPartContentHasSupplementalData;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.view.AbstractCdmEditorViewPart;

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

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

/**

 * @author n.hoffmann

 * @created Jun 15, 2010

 * @version 1.0

 */

public class MediaViewPart extends AbstractCdmEditorViewPart implements IPartContentHasDetails, IPartContentHasSupplementalData {

	public static final String ID = "eu.etaxonomy.taxeditor.editor.view.media";

	private TreeViewer viewer;

	/** {@inheritDoc} */

	@Override

	public void createViewer(Composite parent) {

		viewer = new TreeViewer(new Tree(parent, SWT.MULTI | SWT.H_SCROLL

				| SWT.V_SCROLL | SWT.FULL_SELECTION));

		viewer.setContentProvider(new MediaContentProvider());

		viewer.setLabelProvider(new MediaLabelProvider());

		viewer.setAutoExpandLevel(2);

		// Propagate selection from viewer

		getSite().setSelectionProvider(viewer);

		// Add context menu to tree

		MenuManager menuMgr = new MenuManager();

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

		getSite().registerContextMenu(menuMgr, viewer);

		Control control = viewer.getControl();

		Menu menu = menuMgr.createContextMenu(control);

		control.setMenu(menu);

	}

	/** {@inheritDoc} */

	@Override

	protected ISelection getInitialSelection() {

		if(getEditor() != null){

			return new StructuredSelection(getEditor().getEditorInput());

		}

		return super.getInitialSelection();

	}

	/** {@inheritDoc} */

	@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

                || part instanceof DescriptiveViewPart) {

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

            // description selected in this view

            return;

        }

		if(part instanceof IPartContentHasMedia && ((IPartContentHasMedia) part).canAttachMedia()){

		    if(selection instanceof IStructuredSelection){

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

		        if(firstElement instanceof TreeNode){

		            showViewer(part, new StructuredSelection(((TreeNode) firstElement).getValue()));

		            return;

		        }

		        else if(firstElement!=null

	                    && firstElement instanceof IDescribable<?>){

		            showViewer(part, (IStructuredSelection) selection);

		            return;

		        }

		    }

		}

		showEmptyPage();

	}

	/** {@inheritDoc} */

	@Override

	public void changed(Object object) {

	    viewer.expandToLevel(2);

	    viewer.refresh();

	    if(object != null){

	        StructuredSelection selection = new StructuredSelection(object);

	        viewer.setSelection(selection, true);

	    }

	    //TODO: should be replaced with the possibility to set views dirty

	    // when we move to Eclipse 4

	    // take a look at ISaveblePart

	    if(part instanceof BulkEditor && !(object instanceof SpecimenOrObservationBase<?>)){

	        ((BulkEditor) part).forceDirty();

	        if(CdmStore.getCurrentSessionManager().isRemoting()) {

                IStructuredSelection selection = (IStructuredSelection) ((BulkEditor) part).getSelectionProvider().getSelection();

                ((BulkEditor) part).changed(selection.getFirstElement());

            }

	    }

	    super.changed(object);

	}

	/** {@inheritDoc} */

	@Override

	public Viewer getViewer() {

		return viewer;

	}

	@Override

    public boolean onComplete() {

		return true;

	}

}