eu.etaxonomy.taxeditor.navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/navigator/handler/DeleteHandler.java

   1 // $Id$
   2 /**
   3 * Copyright (C) 2007 EDIT
   4 * European Distributed Institute of Taxonomy
   5 * http://www.e-taxonomy.eu
   6 *
   7 * The contents of this file are subject to the Mozilla Public License Version 1.1
   8 * See LICENSE.TXT at the top of this package for the full license terms.
   9 */
  10
  11 package eu.etaxonomy.taxeditor.navigation.navigator.handler;
  12
  13 import java.util.HashSet;
  14 import java.util.Iterator;
  15 import java.util.Set;
  16
  17 import org.eclipse.core.commands.AbstractHandler;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.commands.IHandler;
  21 import org.eclipse.core.commands.common.NotDefinedException;
  22 import org.eclipse.core.runtime.IStatus;
  23 import org.eclipse.core.runtime.Status;
  24 import org.eclipse.jface.dialogs.MessageDialog;
  25 import org.eclipse.jface.viewers.TreeSelection;
  26 import org.eclipse.ui.IEditorInput;
  27 import org.eclipse.ui.IEditorReference;
  28 import org.eclipse.ui.IWorkbenchPage;
  29 import org.eclipse.ui.PartInitException;
  30 import org.eclipse.ui.handlers.HandlerUtil;
  31
  32 import eu.etaxonomy.cdm.model.taxon.ITaxonTreeNode;
  33 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  34 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  35 import eu.etaxonomy.taxeditor.navigation.NavigationUtil;
  36 import eu.etaxonomy.taxeditor.navigation.navigator.TaxonNavigator;
  37 import eu.etaxonomy.taxeditor.navigation.navigator.operation.DeleteOperation;
  38 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  39
  40 /**
  41  * <p>DeleteTreeNodeHandler class.</p>
  42  *
  43  * @author n.hoffmann
  44  * @created 06.04.2009
  45  * @version 1.0
  46  */
  47 public class DeleteHandler extends AbstractHandler implements IHandler{
  48
  49         private IWorkbenchPage activePage;
  50         private TaxonNavigator taxonNavigator;
  51
  52         /** {@inheritDoc} */
  53         @Override
  54     public Object execute(ExecutionEvent event) throws ExecutionException {
  55
  56                 activePage = HandlerUtil.getActiveWorkbenchWindow(event).getActivePage();
  57
  58                 taxonNavigator = NavigationUtil.showNavigator();
  59
  60                 TreeSelection selection = (TreeSelection) HandlerUtil.getCurrentSelection(event);
  61
  62                 String plural = selection.size() > 1 ? "s" : "";
  63                 // Prompt user for confirmation
  64                 if(! MessageDialog.openConfirm(HandlerUtil.getActiveShell(event), "Confirm Deletion", "Are you sure you want to delete the selected node" + plural +"?")){
  65                         return null;
  66                 }
  67
  68                 Iterator selectionIterator = selection.iterator();
  69                 Set<ITaxonTreeNode> treeNodes = new HashSet<ITaxonTreeNode>();
  70
  71                 while (selectionIterator.hasNext()){
  72                         Object object = selectionIterator.next();
  73                         if(object instanceof ITaxonTreeNode) {
  74                 treeNodes.add((ITaxonTreeNode) object);
  75             }
  76                 }
  77
  78                 AbstractPostOperation operation = null;
  79                 try {
  80
  81
  82                         boolean allEditorsClosed = true;
  83                         for (ITaxonTreeNode treeNode : treeNodes){
  84                                 if(treeNode instanceof TaxonNode) {
  85                                         allEditorsClosed &= closeObsoleteEditor((TaxonNode) treeNode);
  86                                 }
  87                         }
  88
  89                         if (allEditorsClosed){
  90                                 operation = new DeleteOperation(
  91                                                 event.getCommand().getName(), NavigationUtil.getUndoContext(),
  92                                                 treeNodes, taxonNavigator, taxonNavigator);
  93
  94                                 NavigationUtil.executeOperation(operation);
  95                         }
  96
  97
  98
  99                 } catch (NotDefinedException e) {
 100                         NavigationUtil.warn(getClass(), "Command name not set");
 101                 }
 102                 return null;
 103         }
 104
 105         private boolean closeObsoleteEditor(TaxonNode taxonNode){
 106                 boolean result = true;
 107                 for (IEditorReference ref : activePage.getEditorReferences()) {
 108                         try {
 109                                 IEditorInput input = ref.getEditorInput();
 110                                 if (input instanceof TaxonEditorInput) {
 111                                         TaxonNode node = ((TaxonEditorInput) input).getTaxonNode();
 112                                         if (taxonNode.equals(node)) {
 113                                                 result &= activePage.closeEditor(ref.getEditor(false), true);
 114                                         }
 115                                 }
 116                         } catch (PartInitException e) {
 117                                 continue;
 118                         }
 119                 }
 120                 return result;
 121         }
 122 }