org.eclipse.tracecompass.tmf.ui/src/org/eclipse/tracecompass/tmf/ui/views/filter/FilterEditUtils.java

   1 /*******************************************************************************
   2  * Copyright (c) 2013, 2014 Kalray
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Xavier Raynaud - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.tmf.ui.views.filter;
  14
  15 import org.eclipse.jface.util.LocalSelectionTransfer;
  16 import org.eclipse.jface.viewers.ISelection;
  17 import org.eclipse.jface.viewers.IStructuredSelection;
  18 import org.eclipse.tracecompass.tmf.core.filter.model.ITmfFilterTreeNode;
  19
  20 /**
  21  * Utilities for cut/copy/paste/dnd in filter view
  22  * @author Xavier Raynaud <xavier.raynaud@kalray.eu>
  23  */
  24 class FilterEditUtils {
  25
  26     /**
  27      * Gets the ITmfFilterTreeNode in LocalSelectionTransfer, if any
  28      * @return a ITmfFilterTreeNode or <code>null</code>
  29      */
  30     public static ITmfFilterTreeNode getTransferredTreeNode() {
  31         ITmfFilterTreeNode treeNodeToDrop = null;
  32         ISelection sel = LocalSelectionTransfer.getTransfer().getSelection();
  33         if (sel instanceof IStructuredSelection) {
  34             IStructuredSelection selection = (IStructuredSelection) sel;
  35             for (Object data : selection.toList()) {
  36                 if (!(data instanceof ITmfFilterTreeNode)) {
  37                     return null;
  38                 } else if (treeNodeToDrop != null) {
  39                     // should never occur, since tree has SWT.SINGLE style
  40                     return null;
  41                 } else {
  42                     treeNodeToDrop = (ITmfFilterTreeNode) data;
  43                 }
  44             }
  45         }
  46         return treeNodeToDrop;
  47     }
  48 }