taxeditor-navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/handler/DeleteTaxonNodeHandler.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.handler;
  12
  13 import java.util.HashSet;
  14 import java.util.Iterator;
  15 import java.util.Set;
  16
  17 import org.apache.log4j.Logger;
  18 import org.eclipse.core.commands.AbstractHandler;
  19 import org.eclipse.core.commands.ExecutionEvent;
  20 import org.eclipse.core.commands.ExecutionException;
  21 import org.eclipse.core.commands.IHandler;
  22 import org.eclipse.core.commands.common.NotDefinedException;
  23 import org.eclipse.core.commands.operations.IUndoableOperation;
  24 import org.eclipse.core.runtime.IStatus;
  25 import org.eclipse.core.runtime.Status;
  26 import org.eclipse.jface.dialogs.MessageDialog;
  27 import org.eclipse.jface.viewers.TreeSelection;
  28 import org.eclipse.ui.IEditorInput;
  29 import org.eclipse.ui.IEditorReference;
  30 import org.eclipse.ui.IWorkbenchPage;
  31 import org.eclipse.ui.PartInitException;
  32 import org.eclipse.ui.handlers.HandlerUtil;
  33
  34 import eu.etaxonomy.cdm.model.taxon.ITreeNode;
  35 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  36 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  37 import eu.etaxonomy.taxeditor.navigation.NavigationUtil;
  38 import eu.etaxonomy.taxeditor.navigation.navigator.TaxonNavigator;
  39 import eu.etaxonomy.taxeditor.operations.DeleteTreeNodeOperation;
  40
  41 /**
  42  * @author n.hoffmann
  43  * @created 06.04.2009
  44  * @version 1.0
  45  */
  46 public class DeleteTaxonNodeHandler extends AbstractHandler implements IHandler{
  47         private static final Logger logger = Logger
  48                         .getLogger(DeleteTaxonNodeHandler.class);
  49         private IWorkbenchPage activePage;
  50         private TaxonNavigator taxonNavigator;
  51
  52         public Object execute(ExecutionEvent event) throws ExecutionException {
  53
  54                 // Prompt user for confirmation
  55                 if(! MessageDialog.openConfirm(HandlerUtil.getActiveShell(event), "Confirm Deletion", "Are you sure you want to delete the selected taxa?")){
  56                         return null;
  57                 }
  58
  59                 activePage = HandlerUtil.getActiveWorkbenchWindow(event).getActivePage();
  60
  61                 try {
  62                         taxonNavigator = (TaxonNavigator) NavigationUtil.getView(TaxonNavigator.ID);
  63                 } catch (PartInitException e) {
  64                         logger.error(e);
  65                         throw new RuntimeException(e);
  66                 }
  67
  68                 TreeSelection selection = (TreeSelection) HandlerUtil.getCurrentSelection(event);
  69
  70                 Iterator selectionIterator = selection.iterator();
  71                 Set<ITreeNode> treeNodes = new HashSet<ITreeNode>();
  72
  73                 while (selectionIterator.hasNext()){
  74                         Object object = selectionIterator.next();
  75                         if(object instanceof ITreeNode)
  76                                 treeNodes.add((ITreeNode) object);
  77                 }
  78
  79                 IUndoableOperation operation = null;
  80                 try {
  81                         operation = new DeleteTreeNodeOperation(event.getCommand().getName(), NavigationUtil.getUndoContext(), treeNodes, taxonNavigator, taxonNavigator);
  82
  83                         IStatus status = NavigationUtil.executeOperation(operation);
  84
  85
  86                         // FIXME is there a better place for this code?
  87                         if (status == Status.OK_STATUS){
  88                                 for (ITreeNode treeNode : treeNodes){
  89                                         if(treeNode instanceof TaxonNode) {
  90                                                 closeObsoleteEditor((TaxonNode) treeNode);
  91                                         }
  92                                 }
  93                         }
  94
  95                 } catch (NotDefinedException e) {
  96                         logger.warn("Command name not set");
  97                 }
  98                 return null;
  99         }
 100
 101         private void closeObsoleteEditor(TaxonNode taxonNode){
 102                 for (IEditorReference ref : activePage.getEditorReferences()) {
 103                         try {
 104                                 IEditorInput input = ref.getEditorInput();
 105                                 if (input instanceof TaxonEditorInput) {
 106                                         TaxonNode node = ((TaxonEditorInput) input).getTaxonNode();
 107                                         if (taxonNode.equals(node)) {
 108                                                 activePage.closeEditor(ref.getEditor(false), false);
 109                                         }
 110                                 }
 111                         } catch (PartInitException e) {
 112                                 continue;
 113                         }
 114                 }
 115         }
 116 }