eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/key/polytomous/e4/handler/DeleteNodeHandlerE4.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.e4.handler;
  11
  12 import javax.inject.Named;
  13
  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.e4.core.di.annotations.CanExecute;
  19 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  20 import org.eclipse.e4.ui.model.application.ui.menu.MHandledMenuItem;
  21 import org.eclipse.e4.ui.services.IServiceConstants;
  22 import org.eclipse.jface.dialogs.MessageDialog;
  23 import org.eclipse.jface.viewers.IStructuredSelection;
  24 import org.eclipse.swt.widgets.Shell;
  25
  26 import eu.etaxonomy.cdm.model.description.PolytomousKeyNode;
  27 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  28 import eu.etaxonomy.taxeditor.editor.key.polytomous.PolytomousKeyEditorLabels;
  29 import eu.etaxonomy.taxeditor.editor.key.polytomous.e4.PolytomousKeyListEditorE4;
  30 import eu.etaxonomy.taxeditor.editor.key.polytomous.operation.DeleteNodeOperation;
  31 import eu.etaxonomy.taxeditor.editor.l10n.Messages;
  32 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  33 import eu.etaxonomy.taxeditor.operation.e4.RemotingCdmHandlerE4;
  34
  35 /**
  36  * @author n.hoffmann
  37  * @created Dec 6, 2010
  38  * @version 1.0
  39  */
  40 public class DeleteNodeHandlerE4 extends RemotingCdmHandlerE4 {
  41
  42
  43     private static final String DO_YOU_REALLY_WANT_TO_DELETE_THE_NODE_THIS_OPERATION_IS_NOT_REVERSABLE = Messages.DeleteNodeHandler_REALLY_DELETE;
  44     private static final String CONFIRM_DELETION_OF_CHILDREN = Messages.DeleteNodeHandler_CONFIRM_DELETE;
  45     private static final String NO = Messages.DeleteNodeHandler_NO;
  46     private static final String CANCEL = Messages.DeleteNodeHandler_CANCEL;
  47     private static final String YES = Messages.DeleteNodeHandler_YES;
  48     PolytomousKeyNode nodeToBeDeleted;
  49     boolean deleteChildren;
  50
  51     public DeleteNodeHandlerE4(String label) {
  52         super(label);
  53     }
  54
  55     public DeleteNodeHandlerE4() {
  56         super(PolytomousKeyEditorLabels.DELETE_NODE_POLYTOMOUS_KEY_NODE_LABEL);
  57     }
  58
  59     @Override
  60     public IStatus allowOperations(@Named(IServiceConstants.ACTIVE_SELECTION)IStructuredSelection selection,
  61             @Named(IServiceConstants.ACTIVE_SHELL)Shell shell,
  62             @Named(IServiceConstants.ACTIVE_PART)MPart activePart,
  63             MHandledMenuItem menuItem) {
  64
  65         if (selection.getFirstElement() instanceof PolytomousKeyNode) {
  66             label = menuItem.getLocalizedLabel();
  67             PolytomousKeyNode node = (PolytomousKeyNode)selection.getFirstElement();
  68             nodeToBeDeleted = node;
  69             MessageDialog dialog;
  70             if (node.getChildren().size()>0){
  71                 String[] buttonLables = {YES, NO,CANCEL};
  72                 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);
  73                 int returnCode = dialog.open();
  74
  75                 if (returnCode == 0){
  76                     deleteChildren = false;
  77                 } else if (returnCode == 1){
  78                     deleteChildren = true;
  79                 } else{
  80                     return new Status(IStatus.CANCEL, "unknown", //$NON-NLS-1$
  81                             null);
  82                 }
  83
  84
  85             }else{
  86                 String[] buttonLables = {YES, CANCEL};
  87                 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);
  88                 int returnCode = dialog.open();
  89
  90                 if (returnCode == 0){
  91                     deleteChildren = false;
  92                 } else if (returnCode == 1){
  93                    return new Status(IStatus.CANCEL, "unknown", //$NON-NLS-1$
  94                             null);
  95                 }
  96             }
  97         } else {
  98                 MessageDialog.openInformation(
  99                         shell,
 100                         PolytomousKeyEditorLabels.NO_KEY_NODE_SELECTED,
 101                         PolytomousKeyEditorLabels.NO_KEY_NODE_FOR_INSERT_NODE_SELECTED_MESSAGE
 102                         );
 103         }
 104
 105         return Status.OK_STATUS;
 106     }
 107
 108     @Override
 109     public AbstractOperation prepareOperation(@Named(IServiceConstants.ACTIVE_SELECTION)IStructuredSelection selection,
 110             @Named(IServiceConstants.ACTIVE_SHELL)Shell shell,
 111             @Named(IServiceConstants.ACTIVE_PART)MPart activePart,
 112             MHandledMenuItem menuItem) {
 113         IUndoContext undoContext = EditorUtil.getUndoContext();
 114         PolytomousKeyListEditorE4 editor = (PolytomousKeyListEditorE4) activePart.getObject();
 115         if (editor.isDirty()){
 116             boolean proceed = MessageDialog.openQuestion(null,
 117                     Messages.DeleteNodeHandler_SAVE_CHANGES_TITLE, Messages.DeleteNodeHandler_SAVE_CHANGES_MESSAGE);
 118             if (!proceed) {
 119                 return null;
 120             }else{
 121                 editor.save(AbstractUtility.getMonitor());
 122             }
 123         }
 124
 125         label = menuItem.getLocalizedLabel();
 126         DeleteNodeOperation operation ;
 127         if (deleteChildren){
 128             operation = new DeleteNodeOperation(label, undoContext, nodeToBeDeleted, editor, true);
 129         }else{
 130             operation =  new DeleteNodeOperation(label, undoContext, nodeToBeDeleted, editor, false);
 131         }
 132         return operation;
 133     }
 134
 135     @Override
 136     public void onComplete() {
 137     }
 138
 139     /**
 140      * {@inheritDoc}
 141      */
 142     @Override
 143     protected Object getTrigger() {
 144         return this;
 145     }
 146
 147     @CanExecute
 148     public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION)IStructuredSelection selection,
 149             MHandledMenuItem menuItem){
 150         boolean canExecute = false;
 151         canExecute = selection!=null && selection.size()==1;
 152         menuItem.setVisible(canExecute);
 153         return canExecute;
 154     }
 155
 156 }