org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/internal/tmf/ui/project/handlers/OpenTraceHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2013 Ericsson
   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  *   Francois Chouinard - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.internal.tmf.ui.project.handlers;
  14
  15 import org.eclipse.core.commands.AbstractHandler;
  16 import org.eclipse.core.commands.ExecutionEvent;
  17 import org.eclipse.core.commands.ExecutionException;
  18 import org.eclipse.jface.viewers.ISelection;
  19 import org.eclipse.jface.viewers.ISelectionProvider;
  20 import org.eclipse.jface.viewers.TreeSelection;
  21 import org.eclipse.linuxtools.tmf.ui.project.model.TmfOpenTraceHelper;
  22 import org.eclipse.linuxtools.tmf.ui.project.model.TmfTraceElement;
  23 import org.eclipse.ui.IWorkbenchPage;
  24 import org.eclipse.ui.IWorkbenchPart;
  25 import org.eclipse.ui.IWorkbenchWindow;
  26 import org.eclipse.ui.PlatformUI;
  27
  28 /**
  29  * <b><u>OpenTraceHandler</u></b>
  30  * <p>
  31  * TODO: Add support for multiple trace selection
  32  */
  33 public class OpenTraceHandler extends AbstractHandler {
  34
  35     // ------------------------------------------------------------------------
  36     // Attributes
  37     // ------------------------------------------------------------------------
  38
  39     private TmfTraceElement fTrace = null;
  40
  41     // ------------------------------------------------------------------------
  42     // Validation
  43     // ------------------------------------------------------------------------
  44
  45     @Override
  46     public boolean isEnabled() {
  47
  48         // Check if we are closing down
  49         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  50         if (window == null) {
  51             return false;
  52         }
  53
  54         // Get the selection
  55         final IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
  56         final IWorkbenchPart part = page.getActivePart();
  57         if (part == null) {
  58             return false;
  59         }
  60         final ISelectionProvider selectionProvider = part.getSite().getSelectionProvider();
  61         if (selectionProvider == null) {
  62             return false;
  63         }
  64         final ISelection selection = selectionProvider.getSelection();
  65
  66         // Make sure there is only one selection and that it is a trace
  67         fTrace = null;
  68         if (selection instanceof TreeSelection) {
  69             final TreeSelection sel = (TreeSelection) selection;
  70             // There should be only one item selected as per the plugin.xml
  71             final Object element = sel.getFirstElement();
  72             if (element instanceof TmfTraceElement) {
  73                 fTrace = (TmfTraceElement) element;
  74             }
  75         }
  76
  77         // We only enable opening from the Traces folder for now
  78         return (fTrace != null);
  79     }
  80
  81     // ------------------------------------------------------------------------
  82     // Execution
  83     // ------------------------------------------------------------------------
  84
  85     @Override
  86     public Object execute(final ExecutionEvent event) throws ExecutionException {
  87
  88         // Check if we are closing down
  89         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  90         if (window == null) {
  91             return null;
  92         }
  93
  94         // Check that the trace is valid
  95         if (fTrace == null) {
  96             return null;
  97         }
  98
  99         // If trace is under an experiment, use the original trace from the traces folder
 100         TmfOpenTraceHelper.openTraceFromElement(fTrace.getElementUnderTraceFolder());
 101         return null;
 102     }
 103
 104 }