eu.etaxonomy.taxeditor.editor/src/main/java/eu/etaxonomy/taxeditor/editor/view/media/handler/DeleteMediaHandler.java

   1 /**
   2  *
   3  */
   4 package eu.etaxonomy.taxeditor.editor.view.media.handler;
   5
   6 import org.eclipse.core.commands.AbstractHandler;
   7 import org.eclipse.core.commands.ExecutionEvent;
   8 import org.eclipse.core.commands.ExecutionException;
   9 import org.eclipse.core.commands.common.NotDefinedException;
  10 import org.eclipse.jface.viewers.ISelection;
  11 import org.eclipse.jface.viewers.TreePath;
  12 import org.eclipse.jface.viewers.TreeSelection;
  13 import org.eclipse.ui.IEditorInput;
  14 import org.eclipse.ui.IEditorPart;
  15 import org.eclipse.ui.IWorkbenchPart;
  16 import org.eclipse.ui.forms.editor.FormEditor;
  17 import org.eclipse.ui.handlers.HandlerUtil;
  18
  19 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  20 import eu.etaxonomy.cdm.model.media.ImageFile;
  21 import eu.etaxonomy.cdm.model.taxon.Taxon;
  22 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  23 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  24 import eu.etaxonomy.taxeditor.editor.view.media.operation.RemoveImageFromDescriptionElementOperation;
  25 import eu.etaxonomy.taxeditor.model.MessagingUtils;
  26 import eu.etaxonomy.taxeditor.operation.AbstractPostOperation;
  27 import eu.etaxonomy.taxeditor.operation.IPostOperationEnabled;
  28
  29 /**
  30  * <p>DeleteMediaHandler class.</p>
  31  *
  32  * @author p.ciardelli
  33  * @version $Id: $
  34  */
  35 public class DeleteMediaHandler extends AbstractHandler {
  36
  37         /* (non-Javadoc)
  38          * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  39          */
  40         /** {@inheritDoc} */
  41         public Object execute(ExecutionEvent event) throws ExecutionException {
  42                 IWorkbenchPart part = HandlerUtil.getActivePart(event);
  43                 IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part : null;
  44
  45                 IEditorPart editor = HandlerUtil.getActiveEditor(event);
  46                 if (editor instanceof FormEditor) {
  47                         editor = ((FormEditor) editor).getActiveEditor();
  48                 }
  49                 IEditorInput input = editor.getEditorInput();
  50                 if (input instanceof TaxonEditorInput) {
  51                         Taxon taxon = ((TaxonEditorInput) input).getTaxon();
  52
  53                         ISelection selection = HandlerUtil.getCurrentSelection(event);
  54                         if (selection instanceof TreeSelection) {
  55                                 TreePath[] paths = ((TreeSelection) selection).getPaths();
  56
  57                                 int count = paths[0].getSegmentCount();
  58                                 DescriptionElementBase element = null;
  59                                 for (int i = 0; i < count; i++ ) {
  60                                         if (paths[0].getSegment(i) instanceof DescriptionElementBase) {
  61                                                 element = (DescriptionElementBase) paths[0].getSegment(i);
  62                                                 break;
  63                                         }
  64                                 }
  65                                 ImageFile image = (ImageFile) paths[0].getLastSegment();
  66
  67                                 AbstractPostOperation operation = null;
  68                                 try {
  69                                         // TODO use undo context specific to editor
  70                                         operation = new RemoveImageFromDescriptionElementOperation(event.getCommand().getName(),
  71                                                         EditorUtil.getUndoContext(), taxon, image, element, postOperationEnabled);
  72                                         EditorUtil.executeOperation(operation);
  73                                 } catch (NotDefinedException e) {
  74                                         MessagingUtils.warn(getClass(), "Command name not set.");
  75                                 }
  76                         }
  77                 }
  78                 return null;
  79         }
  80
  81 }