eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/key/polytomous/handler/DeleteNodeHandler.java

   1 /**
   2  * Copyright (C) 2007 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9
  10 package eu.etaxonomy.taxeditor.editor.key.polytomous.handler;
  11
  12 import org.eclipse.core.commands.ExecutionEvent;
  13 import org.eclipse.core.commands.common.NotDefinedException;
  14 import org.eclipse.core.commands.operations.AbstractOperation;
  15 import org.eclipse.core.commands.operations.IUndoContext;
  16 import org.eclipse.core.runtime.IStatus;
  17 import org.eclipse.core.runtime.Status;
  18 import org.eclipse.jface.dialogs.MessageDialog;
  19 import org.eclipse.jface.viewers.IStructuredSelection;
  20 import org.eclipse.ui.IEditorPart;
  21 import org.eclipse.ui.handlers.HandlerUtil;
  22
  23 import eu.etaxonomy.cdm.model.description.PolytomousKeyNode;
  24 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  25 import eu.etaxonomy.taxeditor.editor.key.KeyEditor;
  26 import eu.etaxonomy.taxeditor.editor.key.polytomous.IPolytomousKeyEditorPage;
  27 import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyEditorLabels;
  28 import eu.etaxonomy.taxeditor.editor.key.polytomous.operation.DeleteNodeOperation;
  29 import eu.etaxonomy.taxeditor.editor.l10n.Messages;
  30 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  31 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  32 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  33
  34 /**
  35  * @author n.hoffmann
  36  * @created Dec 6, 2010
  37  * @version 1.0
  38  */
  39 public class DeleteNodeHandler extends AbstractPolytomousKeyNodeHandler {
  40
  41
  42     private static final String DO_YOU_REALLY_WANT_TO_DELETE_THE_NODE_THIS_OPERATION_IS_NOT_REVERSABLE = Messages.DeleteNodeHandler_REALLY_DELETE;
  43     private static final String CONFIRM_DELETION_OF_CHILDREN = Messages.DeleteNodeHandler_CONFIRM_DELETE;
  44     private static final String NO = Messages.DeleteNodeHandler_NO;
  45     private static final String CANCEL = Messages.DeleteNodeHandler_CANCEL;
  46     private static final String YES = Messages.DeleteNodeHandler_YES;
  47     PolytomousKeyNode nodeToBeDeleted;
  48     boolean deleteChildren;
  49     /**
  50      * @param label
  51      */
  52     public DeleteNodeHandler(String label) {
  53         super(label);
  54
  55     }
  56
  57
  58
  59     public DeleteNodeHandler() {
  60         super(PolytomousKeyEditorLabels.DELETE_NODE_POLYTOMOUS_KEY_NODE_LABEL);
  61     }
  62
  63     /**
  64      * {@inheritDoc}
  65      */
  66     @Override
  67     public IStatus allowOperations(ExecutionEvent event) {
  68         IEditorPart editor = HandlerUtil.getActiveEditor(event);
  69         IStructuredSelection selection = (IStructuredSelection) HandlerUtil
  70                 .getCurrentSelection(event);
  71         AbstractPostOperation operation;
  72         if (editor instanceof KeyEditor) {
  73             editorPage = (IPolytomousKeyEditorPage) ((KeyEditor) editor)
  74                     .getActiveEditor();
  75         }
  76
  77
  78         if (selection.getFirstElement() instanceof PolytomousKeyNode) {
  79             try {
  80                 String label = event.getCommand().getName();
  81                 IUndoContext undoContext = EditorUtil.getUndoContext();
  82                 PolytomousKeyNode node = (PolytomousKeyNode)selection.getFirstElement();
  83                 nodeToBeDeleted = node;
  84                 MessageDialog dialog;
  85                 if (node.getChildren().size()>0){
  86                     String[] buttonLables = {YES, NO,CANCEL};
  87                     dialog = new MessageDialog(null, CONFIRM_DELETION_OF_CHILDREN, null, DO_YOU_REALLY_WANT_TO_DELETE_THE_NODE_THIS_OPERATION_IS_NOT_REVERSABLE+Messages.DeleteNodeHandler_NODE_HAS_CHILDREN, MessageDialog.QUESTION_WITH_CANCEL, buttonLables, 0);
  88                     int returnCode = dialog.open();
  89
  90                     if (returnCode == 0){
  91                         deleteChildren = false;
  92                     } else if (returnCode == 1){
  93                         deleteChildren = true;
  94                     } else{
  95                         return new Status(IStatus.CANCEL, "unknown", //$NON-NLS-1$
  96                                 null);
  97                     }
  98
  99
 100                 }else{
 101                     String[] buttonLables = {YES, CANCEL};
 102                     dialog = new MessageDialog(null, CONFIRM_DELETION_OF_CHILDREN, null, DO_YOU_REALLY_WANT_TO_DELETE_THE_NODE_THIS_OPERATION_IS_NOT_REVERSABLE, MessageDialog.QUESTION_WITH_CANCEL, buttonLables, 1);
 103                     int returnCode = dialog.open();
 104
 105                     if (returnCode == 0){
 106                         deleteChildren = false;
 107                     } else if (returnCode == 1){
 108                        return new Status(IStatus.CANCEL, "unknown", //$NON-NLS-1$
 109                                 null);
 110                     }
 111                 }
 112
 113
 114
 115
 116             } catch (NotDefinedException e) {
 117                 MessagingUtils.warn(getClass(), "Command name not set."); //$NON-NLS-1$
 118             }
 119         } else {
 120                 MessageDialog.openInformation(
 121                         AbstractUtility.getShell(),
 122                         PolytomousKeyEditorLabels.NO_KEY_NODE_SELECTED,
 123                         PolytomousKeyEditorLabels.NO_KEY_NODE_FOR_INSERT_NODE_SELECTED_MESSAGE
 124                         );
 125         }
 126
 127         return Status.OK_STATUS;
 128     }
 129
 130     /**
 131      * {@inheritDoc}
 132      */
 133     @Override
 134     public AbstractOperation prepareOperation(ExecutionEvent event) {
 135         IUndoContext undoContext = EditorUtil.getUndoContext();
 136         String label = ""; //$NON-NLS-1$
 137         IEditorPart editor = HandlerUtil.getActiveEditor(event);
 138         if (editor.isDirty()){
 139             boolean proceed = MessageDialog.openQuestion(null,
 140                     Messages.DeleteNodeHandler_SAVE_CHANGES_TITLE, Messages.DeleteNodeHandler_SAVE_CHANGES_MESSAGE);
 141             if (!proceed) {
 142                 return null;
 143             }else{
 144                 editor.doSave(EditorUtil.getMonitor());
 145             }
 146         }
 147
 148         try {
 149             label = event.getCommand().getName();
 150         } catch (NotDefinedException e) {
 151             MessagingUtils.warn(getClass(), "Command name not set."); //$NON-NLS-1$
 152         }
 153         DeleteNodeOperation operation ;
 154         if (deleteChildren){
 155             operation = new DeleteNodeOperation(label, undoContext, nodeToBeDeleted, editorPage, true);
 156         }else{
 157             operation =  new DeleteNodeOperation(label, undoContext, nodeToBeDeleted, editorPage, false);
 158         }
 159
 160         return operation;
 161     }
 162
 163     /**
 164      * {@inheritDoc}
 165      */
 166     @Override
 167     public void onComplete() {
 168         // TODO Auto-generated method stub
 169
 170     }
 171
 172 }