eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/descriptive/handler/CreateDescriptionElementHandler.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.editor.view.descriptive.handler;
  12
  13 import org.eclipse.core.commands.AbstractHandler;
  14 import org.eclipse.core.commands.ExecutionEvent;
  15 import org.eclipse.core.commands.ExecutionException;
  16 import org.eclipse.core.commands.common.NotDefinedException;
  17 import org.eclipse.jface.viewers.ISelection;
  18 import org.eclipse.jface.viewers.IStructuredSelection;
  19 import org.eclipse.jface.viewers.ITreeSelection;
  20 import org.eclipse.jface.viewers.TreePath;
  21 import org.eclipse.swt.widgets.Event;
  22 import org.eclipse.ui.IEditorInput;
  23 import org.eclipse.ui.IEditorPart;
  24 import org.eclipse.ui.IWorkbenchPart;
  25 import org.eclipse.ui.forms.editor.FormEditor;
  26 import org.eclipse.ui.handlers.HandlerUtil;
  27
  28 import eu.etaxonomy.cdm.model.description.Feature;
  29 import eu.etaxonomy.cdm.model.description.TaxonDescription;
  30 import eu.etaxonomy.cdm.model.taxon.Taxon;
  31 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  32 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  33 import eu.etaxonomy.taxeditor.editor.view.descriptive.operation.CreateDescriptionElementOperation;
  34 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  35 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  36
  37 /**
  38  * <p>CreateDescriptionElementHandler class.</p>
  39  *
  40  * @author n.hoffmann
  41  * @created 16.04.2009
  42  * @version 1.0
  43  */
  44 public class CreateDescriptionElementHandler extends AbstractHandler {
  45
  46         /*
  47          * (non-Javadoc)
  48          *
  49          * @see
  50          * org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.
  51          * ExecutionEvent)
  52          */
  53         /** {@inheritDoc} */
  54         public Object execute(ExecutionEvent event) throws ExecutionException {
  55                 IWorkbenchPart part = HandlerUtil.getActivePart(event);
  56                 IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part
  57                                 : null;
  58
  59                 IEditorPart editor = HandlerUtil.getActiveEditor(event);
  60                 if (editor instanceof FormEditor) {
  61                         editor = ((FormEditor) editor).getActiveEditor();
  62                 }
  63                 IEditorInput input = editor.getEditorInput();
  64                 if (input instanceof TaxonEditorInput) {
  65                         Taxon taxon = ((TaxonEditorInput) input).getTaxon();
  66
  67                         TaxonDescription description = null;
  68
  69                         ISelection selection = HandlerUtil.getCurrentSelection(event);
  70                         if (selection instanceof ITreeSelection) {
  71                                 TreePath[] paths = ((ITreeSelection) selection).getPaths();
  72                                 Object firstSegment = paths[0].getFirstSegment();
  73                                 if (firstSegment instanceof TaxonDescription) {
  74                                         description = (TaxonDescription) firstSegment;
  75                                 }
  76                         }else if (selection instanceof IStructuredSelection) {
  77                                 Object selectedElement = ((IStructuredSelection) selection)
  78                                                 .getFirstElement();
  79                                 if (selectedElement instanceof TaxonDescription){
  80                                         description = (TaxonDescription) selectedElement;
  81                                 }
  82                         }
  83
  84                         if (description != null) {
  85                                 AbstractPostOperation operation = null;
  86                                 try {
  87                                         // TODO use undo context specific to editor
  88                                         operation = operationCreationInstance(event.getCommand().getName(), event, taxon, description, postOperationEnabled);
  89                                         EditorUtil.executeOperation(operation);
  90                                 } catch (NotDefinedException e) {
  91                                         EditorUtil.warn(getClass(), "Command name not set");
  92                                 }
  93                         } else {
  94                                 EditorUtil.error(getClass(), new IllegalArgumentException("Could not determine the taxon description"));
  95                                 return null;
  96                         }
  97                 }
  98                 return null;
  99
 100         }
 101
 102         /**
 103          * Added to make the Class more generic and limit the amount of code changes required
 104          * @param label
 105          * @param event
 106          * @param taxon
 107          * @param description
 108          * @param postOperationEnabled
 109          * @return
 110          */
 111         protected AbstractPostOperation operationCreationInstance(String label, ExecutionEvent event, Taxon taxon, TaxonDescription description, IPostOperationEnabled postOperationEnabled) {
 112                 Feature feature = (Feature) ((Event) event.getTrigger()).data;
 113                 return new CreateDescriptionElementOperation(label,
 114                                         EditorUtil.getUndoContext(), taxon,
 115                                         description, feature, postOperationEnabled);
 116         }
 117
 118 }