eu.etaxonomy.taxeditor.navigation/src/main/java/eu/etaxonomy/taxeditor/navigation/navigator/TreeNodeDropAdapterAssistant.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;
  12
  13 import java.util.EnumSet;
  14 import java.util.HashSet;
  15 import java.util.Iterator;
  16 import java.util.Set;
  17
  18 import org.apache.log4j.Logger;
  19 import org.eclipse.core.commands.operations.IUndoContext;
  20 import org.eclipse.core.runtime.IStatus;
  21 import org.eclipse.core.runtime.Status;
  22 import org.eclipse.jface.dialogs.MessageDialog;
  23 import org.eclipse.jface.util.LocalSelectionTransfer;
  24 import org.eclipse.jface.viewers.ISelection;
  25 import org.eclipse.jface.viewers.TreeSelection;
  26 import org.eclipse.swt.dnd.DropTargetEvent;
  27 import org.eclipse.swt.dnd.TransferData;
  28 import org.eclipse.ui.navigator.CommonDropAdapter;
  29 import org.eclipse.ui.navigator.CommonDropAdapterAssistant;
  30
  31 import eu.etaxonomy.cdm.model.common.CdmBase;
  32 import eu.etaxonomy.cdm.model.taxon.ITaxonTreeNode;
  33 import eu.etaxonomy.cdm.model.taxon.TaxonNode;
  34 import eu.etaxonomy.cdm.persistence.hibernate.permission.CRUD;
  35 import eu.etaxonomy.taxeditor.navigation.NavigationUtil;
  36 import eu.etaxonomy.taxeditor.navigation.navigator.operation.MoveTaxonOperation;
  37 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  38 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  39 import eu.etaxonomy.taxeditor.store.CdmStore;
  40
  41 /**
  42  * <p>TaxonNodeDropAdapterAssistant class.</p>
  43  *
  44  * @author p.ciardelli
  45  * @created 03.06.2009
  46  * @version 1.0
  47  */
  48 public class TreeNodeDropAdapterAssistant extends CommonDropAdapterAssistant implements IPostOperationEnabled {
  49
  50         private static final Logger logger = Logger.getLogger(TreeNodeDropAdapterAssistant.class);
  51
  52         /** Constant <code>ID="eu.etaxonomy.taxeditor.navigation.navig"{trunked}</code> */
  53         public static final String ID = "eu.etaxonomy.taxeditor.navigation.navigator.dropassistant"; //$NON-NLS-1$
  54
  55         private static final EnumSet<CRUD> UPDATE = EnumSet.of(CRUD.UPDATE);
  56
  57         /* (non-Javadoc)
  58          * @see org.eclipse.ui.navigator.CommonDropAdapterAssistant#handleDrop(org.eclipse.ui.navigator.CommonDropAdapter, org.eclipse.swt.dnd.DropTargetEvent, java.lang.Object)
  59          */
  60         /** {@inheritDoc} */
  61         @Override
  62         public IStatus handleDrop(CommonDropAdapter dropAdapter,
  63                         DropTargetEvent dropTargetEvent, Object target) {
  64
  65                 if (target instanceof ITaxonTreeNode) {
  66                         Set<TaxonNode> taxonNodes = getSelectedTaxa();
  67                         ITaxonTreeNode targetTreeNode = (ITaxonTreeNode) target;
  68                         if(taxonNodes != null) {
  69                 return moveTaxon(taxonNodes, targetTreeNode);
  70             }
  71                 }
  72
  73                 return Status.CANCEL_STATUS;
  74         }
  75
  76         private Set<TaxonNode> getSelectedTaxa(){
  77                 HashSet<TaxonNode> taxonNodes = new HashSet<TaxonNode>();
  78
  79                 ISelection selection = LocalSelectionTransfer.getTransfer().getSelection();
  80                 if (selection instanceof TreeSelection) {
  81
  82                         Iterator selectionIterator = ((TreeSelection) selection).iterator();
  83
  84                         while (selectionIterator.hasNext()){
  85                                 Object object = selectionIterator.next();
  86                                 if(object instanceof TaxonNode){
  87                                         TaxonNode taxonNode = (TaxonNode) object;
  88                                         taxonNodes.add(taxonNode);
  89                                 }
  90                         }
  91                 }
  92                 return taxonNodes.size() > 0 ? taxonNodes : null;
  93         }
  94
  95         /* (non-Javadoc)
  96          * @see org.eclipse.ui.navigator.CommonDropAdapterAssistant#validateDrop(java.lang.Object, int, org.eclipse.swt.dnd.TransferData)
  97          */
  98         /** {@inheritDoc} */
  99         @Override
 100         public IStatus validateDrop(Object target, int operation,
 101                         TransferData transferType) {
 102                 if (target instanceof ITaxonTreeNode) {
 103
 104                     // check users permissions with target taxonnode and taxon
 105                     if (target instanceof TaxonNode) {
 106                         TaxonNode targetNode = (TaxonNode)target;
 107                         Boolean hasTargetNodePermission = CdmStore.currentAuthentiationHasPermission(targetNode, UPDATE);
 108                 Boolean hasTargetTaxonPermission = CdmStore.currentAuthentiationHasPermission(targetNode.getTaxon(), UPDATE);
 109
 110                 if(logger.isDebugEnabled()){
 111                     logger.debug("target: " + targetNode.getTaxon().getTitleCache());
 112                 }
 113
 114                         if(!hasTargetNodePermission || ! hasTargetNodePermission){
 115                             if(logger.isDebugEnabled()){
 116                                 logger.debug("CANCEL_STATUS for target node: " + hasTargetNodePermission.toString() + " " + hasTargetTaxonPermission.toString() + " ");
 117                             }
 118                             return Status.CANCEL_STATUS;
 119                         }
 120                     }
 121
 122                     // do not allow to drop onto itself and
 123                     // check users permissions with all selected taxon nodes and taxa
 124                     for(TaxonNode taxonNode : getSelectedTaxa()){
 125                             logger.debug("selectedTaxa: " + taxonNode.getTaxon().getTitleCache());
 126                                 Boolean isSameTaxonNode = taxonNode.equals(target);
 127                                 Boolean hasTaxonNodePermission = CdmStore.currentAuthentiationHasPermission(taxonNode, UPDATE);
 128                                 Boolean hasTaxonPermission = CdmStore.currentAuthentiationHasPermission(taxonNode.getTaxon(), UPDATE);
 129                 if (
 130                                 isSameTaxonNode
 131                                 || !hasTaxonNodePermission
 132                     || !hasTaxonPermission
 133                         ) {
 134                     if(logger.isDebugEnabled()){
 135                         logger.debug("CANCEL_STATUS for selected  " + isSameTaxonNode.toString() + " " + hasTaxonNodePermission.toString() + " " + hasTaxonPermission.toString() + " ");
 136                     }
 137                                         return Status.CANCEL_STATUS;
 138                                 }
 139                         }
 140                         logger.debug("OK_STATUS");
 141                         return Status.OK_STATUS;
 142                 }
 143                 logger.debug("CANCEL_STATUS");
 144                 return Status.CANCEL_STATUS;
 145         }
 146
 147
 148         /**
 149          * @param childTaxonNode
 150          * @param parentTaxon
 151          * @return
 152          */
 153         private IStatus moveTaxon(Set<TaxonNode> taxonNodes, ITaxonTreeNode targetITaxonTreeNode) {
 154
 155                 TaxonNavigator taxonNavigator;
 156                 taxonNavigator = (TaxonNavigator) NavigationUtil.showView(TaxonNavigator.ID);
 157
 158                 if(targetITaxonTreeNode instanceof TaxonNode){
 159
 160                         TaxonNode targetTaxonNode = (TaxonNode) targetITaxonTreeNode;
 161
 162 //                      for(TaxonNode taxonNode : taxonNodes){
 163 //                              if (taxonNode.equals(targetTaxonNode)) {
 164 //                                      return Status.CANCEL_STATUS;
 165 //                              }
 166 //                      }
 167
 168                         // Make sure parent taxon does not have unsaved changes
 169                         if (NavigationUtil.isDirty(targetTaxonNode)){
 170                                 MessageDialog.openWarning(NavigationUtil.getShell(), "Unsaved Parent Taxon", "There are unsaved " +
 171                                 "changes in the parent taxon. Pleas save first.");
 172                                 return Status.CANCEL_STATUS;
 173                         }
 174
 175
 176                         // Make sure parentTaxon is not the drop target
 177 //                      if (!childTaxonNode.isTopmostNode() && childTaxonNode.getParent().equals(targetTaxonNode)){
 178 //                              return Status.CANCEL_STATUS;
 179 //                      }
 180
 181                         // Make sure taxon is not being dropped onto itself
 182 //                      if (childTaxonNode.equals(targetTaxonNode)) {
 183 //                              return Status.CANCEL_STATUS;
 184 //                      }
 185
 186
 187
 188                 }
 189
 190                 IUndoContext workspaceUndoContext = NavigationUtil.getWorkbenchUndoContext();
 191                 if (workspaceUndoContext == null) {
 192                         logger.error("Workspace undo context is null. DND operation cancelled");
 193                         return Status.CANCEL_STATUS;
 194                 }
 195
 196                 AbstractPostOperation operation = new MoveTaxonOperation
 197                                 ("Move Taxon", workspaceUndoContext, taxonNodes, targetITaxonTreeNode, this, taxonNavigator);
 198                 NavigationUtil.executeOperation(operation);
 199
 200                 logger.info("Moved taxa to new parent " + targetITaxonTreeNode);
 201                 return Status.OK_STATUS;
 202         }
 203
 204         /* (non-Javadoc)
 205          * @see eu.etaxonomy.taxeditor.operations.IPostOperationEnabled#postOperation(eu.etaxonomy.cdm.model.common.CdmBase)
 206          */
 207         /** {@inheritDoc} */
 208         @Override
 209     public boolean postOperation(CdmBase objectAffectedByOperation) {
 210                 return true;
 211         }
 212
 213         /**
 214          * <p>onComplete</p>
 215          *
 216          * @return a boolean.
 217          */
 218         @Override
 219     public boolean onComplete() {
 220                 // TODO Auto-generated method stub
 221                 return false;
 222         }
 223
 224 }