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// $Id$
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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.navigation.navigator.handler;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Set;
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import org.eclipse.core.commands.AbstractHandler;
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import org.eclipse.core.commands.ExecutionEvent;
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import org.eclipse.core.commands.ExecutionException;
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import org.eclipse.core.commands.IHandler;
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import org.eclipse.core.commands.common.NotDefinedException;
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import org.eclipse.jface.dialogs.MessageDialog;
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import org.eclipse.jface.viewers.TreeSelection;
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import org.eclipse.ui.IEditorInput;
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import org.eclipse.ui.IEditorReference;
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import org.eclipse.ui.IWorkbenchPage;
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import org.eclipse.ui.PartInitException;
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import org.eclipse.ui.handlers.HandlerUtil;
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import eu.etaxonomy.cdm.model.taxon.ITaxonTreeNode;
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import eu.etaxonomy.cdm.model.taxon.TaxonNode;
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import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
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import eu.etaxonomy.taxeditor.navigation.NavigationUtil;
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import eu.etaxonomy.taxeditor.navigation.navigator.TaxonNavigator;
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import eu.etaxonomy.taxeditor.navigation.navigator.operation.DeleteOperation;
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import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
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/**
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* <p>DeleteTreeNodeHandler class.</p>
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*
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* @author n.hoffmann
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* @created 06.04.2009
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* @version 1.0
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*/
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public class DeleteHandler extends AbstractHandler implements IHandler{
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private IWorkbenchPage activePage;
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private TaxonNavigator taxonNavigator;
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/** {@inheritDoc} */
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@Override
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public Object execute(ExecutionEvent event) throws ExecutionException {
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activePage = HandlerUtil.getActiveWorkbenchWindow(event).getActivePage();
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taxonNavigator = NavigationUtil.showNavigator();
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TreeSelection selection = (TreeSelection) HandlerUtil.getCurrentSelection(event);
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String plural = selection.size() > 1 ? "s" : "";
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// Prompt user for confirmation
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if(! MessageDialog.openConfirm(HandlerUtil.getActiveShell(event), "Confirm Deletion", "Are you sure you want to delete the selected node" + plural +"?")){
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return null;
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}
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Iterator selectionIterator = selection.iterator();
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Set<ITaxonTreeNode> treeNodes = new HashSet<ITaxonTreeNode>();
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while (selectionIterator.hasNext()){
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Object object = selectionIterator.next();
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if(object instanceof ITaxonTreeNode) {
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treeNodes.add((ITaxonTreeNode) object);
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}
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}
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AbstractPostOperation operation = null;
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try {
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boolean allEditorsClosed = true;
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for (ITaxonTreeNode treeNode : treeNodes){
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if(treeNode instanceof TaxonNode) {
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allEditorsClosed &= closeObsoleteEditor((TaxonNode) treeNode);
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}
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}
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if (allEditorsClosed){
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operation = new DeleteOperation(
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event.getCommand().getName(), NavigationUtil.getUndoContext(),
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treeNodes, taxonNavigator, taxonNavigator);
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NavigationUtil.executeOperation(operation);
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}
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} catch (NotDefinedException e) {
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NavigationUtil.warn(getClass(), "Command name not set");
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}
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return null;
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}
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private boolean closeObsoleteEditor(TaxonNode taxonNode){
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boolean result = true;
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for (IEditorReference ref : activePage.getEditorReferences()) {
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try {
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IEditorInput input = ref.getEditorInput();
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if (input instanceof TaxonEditorInput) {
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TaxonNode node = ((TaxonEditorInput) input).getTaxonNode();
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if (taxonNode.equals(node)) {
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result &= activePage.closeEditor(ref.getEditor(false), true);
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}
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}
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} catch (PartInitException e) {
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continue;
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}
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}
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return result;
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}
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}
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