/*
 *  License (BSD Style License):
 *   Copyright (c) 2011
 *   Software Engineering
 *   Department of Computer Science
 *   Technische Universität Darmstadt
 *   All rights reserved.
 * 
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions are met:
 * 
 *   - Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *   - Neither the name of the Software Engineering Group or Technische 
 *     Universität Darmstadt nor the names of its contributors may be used to 
 *     endorse or promote products derived from this software without specific 
 *     prior written permission.
 * 
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 *   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *   POSSIBILITY OF SUCH DAMAGE.
 */
package de.tud.cs.st.vespucci.vespucci_model.diagram.navigator;

import java.util.Iterator;

import org.eclipse.core.resources.IFile;
import org.eclipse.emf.common.ui.URIEditorInput;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.workspace.util.WorkspaceSynchronizer;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.GraphicalViewer;
import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramEditor;
import org.eclipse.gmf.runtime.diagram.ui.resources.editor.document.IDiagramDocument;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.navigator.ILinkHelper;
import org.eclipse.ui.part.FileEditorInput;

/**
 * @generated
 */
public class VespucciNavigatorLinkHelper implements ILinkHelper {

	/**
	 * @generated
	 */
	private static IEditorInput getEditorInput(Diagram diagram) {
		Resource diagramResource = diagram.eResource();
		for (EObject nextEObject : diagramResource.getContents()) {
			if (nextEObject == diagram) {
				return new FileEditorInput(WorkspaceSynchronizer.getFile(diagramResource));
			}
			if (nextEObject instanceof Diagram) {
				break;
			}
		}
		URI uri = EcoreUtil.getURI(diagram);
		String editorName = uri.lastSegment() + '#' + diagram.eResource().getContents().indexOf(diagram);
		IEditorInput editorInput = new URIEditorInput(uri, editorName);
		return editorInput;
	}

	/**
	 * @generated
	 */
	public IStructuredSelection findSelection(IEditorInput anInput) {
		IDiagramDocument document = de.tud.cs.st.vespucci.vespucci_model.diagram.part.VespucciDiagramEditorPlugin.getInstance()
				.getDocumentProvider().getDiagramDocument(anInput);
		if (document == null) {
			return StructuredSelection.EMPTY;
		}
		Diagram diagram = document.getDiagram();
		if (diagram == null || diagram.eResource() == null) {
			return StructuredSelection.EMPTY;
		}
		IFile file = WorkspaceSynchronizer.getFile(diagram.eResource());
		if (file != null) {
			de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorItem item = new de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorItem(
					diagram, file, false);
			return new StructuredSelection(item);
		}
		return StructuredSelection.EMPTY;
	}

	/**
	 * @generated
	 */
	public void activateEditor(IWorkbenchPage aPage, IStructuredSelection aSelection) {
		if (aSelection == null || aSelection.isEmpty()) {
			return;
		}
		if (false == aSelection.getFirstElement() instanceof de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciAbstractNavigatorItem) {
			return;
		}

		de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciAbstractNavigatorItem abstractNavigatorItem = (de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciAbstractNavigatorItem) aSelection
				.getFirstElement();
		View navigatorView = null;
		if (abstractNavigatorItem instanceof de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorItem) {
			navigatorView = ((de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorItem) abstractNavigatorItem)
					.getView();
		} else if (abstractNavigatorItem instanceof de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorGroup) {
			de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorGroup navigatorGroup = (de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorGroup) abstractNavigatorItem;
			if (navigatorGroup.getParent() instanceof de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorItem) {
				navigatorView = ((de.tud.cs.st.vespucci.vespucci_model.diagram.navigator.VespucciNavigatorItem) navigatorGroup
						.getParent()).getView();
			}
		}
		if (navigatorView == null) {
			return;
		}
		IEditorInput editorInput = getEditorInput(navigatorView.getDiagram());
		IEditorPart editor = aPage.findEditor(editorInput);
		if (editor == null) {
			return;
		}
		aPage.bringToTop(editor);
		if (editor instanceof DiagramEditor) {
			DiagramEditor diagramEditor = (DiagramEditor) editor;
			ResourceSet diagramEditorResourceSet = diagramEditor.getEditingDomain().getResourceSet();
			EObject selectedView = diagramEditorResourceSet.getEObject(EcoreUtil.getURI(navigatorView), true);
			if (selectedView == null) {
				return;
			}
			GraphicalViewer graphicalViewer = (GraphicalViewer) diagramEditor.getAdapter(GraphicalViewer.class);
			EditPart selectedEditPart = (EditPart) graphicalViewer.getEditPartRegistry().get(selectedView);
			if (selectedEditPart != null) {
				graphicalViewer.select(selectedEditPart);
			}
		}
	}

}