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.apache.log4j.Logger;
   7 import org.eclipse.core.commands.AbstractHandler;
   8 import org.eclipse.core.commands.ExecutionEvent;
   9 import org.eclipse.core.commands.ExecutionException;
  10 import org.eclipse.core.commands.common.NotDefinedException;
  11 import org.eclipse.jface.viewers.ISelection;
  12 import org.eclipse.jface.viewers.TreePath;
  13 import org.eclipse.jface.viewers.TreeSelection;
  14 import org.eclipse.ui.IEditorInput;
  15 import org.eclipse.ui.IEditorPart;
  16 import org.eclipse.ui.IWorkbenchPart;
  17 import org.eclipse.ui.forms.editor.FormEditor;
  18 import org.eclipse.ui.handlers.HandlerUtil;
  19
  20 import eu.etaxonomy.cdm.model.description.DescriptionElementBase;
  21 import eu.etaxonomy.cdm.model.media.ImageFile;
  22 import eu.etaxonomy.cdm.model.taxon.Taxon;
  23 import eu.etaxonomy.taxeditor.editor.EditorUtil;
  24 import eu.etaxonomy.taxeditor.editor.TaxonEditorInput;
  25 import eu.etaxonomy.taxeditor.operations.AbstractPostOperation;
  26 import eu.etaxonomy.taxeditor.operations.IPostOperationEnabled;
  27 import eu.etaxonomy.taxeditor.operations.RemoveImageFromDescriptionElementOperation;
  28
  29 /**
  30  * <p>DeleteMediaHandler class.</p>
  31  *
  32  * @author p.ciardelli
  33  * @version $Id: $
  34  */
  35 public class DeleteMediaHandler extends AbstractHandler {
  36         private static final Logger logger = Logger
  37                         .getLogger(DeleteMediaHandler.class);
  38
  39         /* (non-Javadoc)
  40          * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  41          */
  42         /** {@inheritDoc} */
  43         public Object execute(ExecutionEvent event) throws ExecutionException {
  44                 IWorkbenchPart part = HandlerUtil.getActivePart(event);
  45                 IPostOperationEnabled postOperationEnabled = (part instanceof IPostOperationEnabled) ? (IPostOperationEnabled) part : null;
  46
  47                 IEditorPart editor = HandlerUtil.getActiveEditor(event);
  48                 if (editor instanceof FormEditor) {
  49                         editor = ((FormEditor) editor).getActiveEditor();
  50                 }
  51                 IEditorInput input = editor.getEditorInput();
  52                 if (input instanceof TaxonEditorInput) {
  53                         Taxon taxon = ((TaxonEditorInput) input).getTaxon();
  54
  55                         ISelection selection = HandlerUtil.getCurrentSelection(event);
  56                         if (selection instanceof TreeSelection) {
  57                                 TreePath[] paths = ((TreeSelection) selection).getPaths();
  58
  59                                 int count = paths[0].getSegmentCount();
  60                                 DescriptionElementBase element = null;
  61                                 for (int i = 0; i < count; i++ ) {
  62                                         if (paths[0].getSegment(i) instanceof DescriptionElementBase) {
  63                                                 element = (DescriptionElementBase) paths[0].getSegment(i);
  64                                                 break;
  65                                         }
  66                                 }
  67                                 ImageFile image = (ImageFile) paths[0].getLastSegment();
  68
  69                                 AbstractPostOperation operation = null;
  70                                 try {
  71                                         // TODO use undo context specific to editor
  72                                         operation = new RemoveImageFromDescriptionElementOperation(event.getCommand().getName(),
  73                                                         EditorUtil.getUndoContext(), taxon, image, element, postOperationEnabled);
  74                                         EditorUtil.executeOperation(operation);
  75                                 } catch (NotDefinedException e) {
  76                                         logger.warn("Command name not set");
  77                                 }
  78                         }
  79                 }
  80                 return null;
  81         }
  82
  83 }