bundles/org.simantics.ui/src/org/simantics/ui/workbench/handler/SessionRedoHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007- VTT Technical Research Centre of Finland.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     VTT Technical Research Centre of Finland - initial API and implementation
  10  *******************************************************************************/
  11 package org.simantics.ui.workbench.handler;
  12
  13 import java.lang.reflect.InvocationTargetException;
  14 import java.util.List;
  15 import java.util.concurrent.atomic.AtomicReference;
  16
  17 import org.eclipse.core.commands.AbstractHandler;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.runtime.IProgressMonitor;
  21 import org.eclipse.jface.dialogs.ProgressMonitorDialog;
  22 import org.eclipse.jface.operation.IRunnableWithProgress;
  23 import org.eclipse.swt.widgets.Shell;
  24 import org.eclipse.ui.IActionBars;
  25 import org.eclipse.ui.IWorkbenchPart;
  26 import org.eclipse.ui.PlatformUI;
  27 import org.eclipse.ui.handlers.HandlerUtil;
  28 import org.simantics.Simantics;
  29 import org.simantics.db.ChangeSetIdentifier;
  30 import org.simantics.db.Operation;
  31 import org.simantics.db.Session;
  32 import org.simantics.db.exception.DatabaseException;
  33 import org.simantics.db.exception.NoHistoryException;
  34 import org.simantics.db.service.ManagementSupport;
  35 import org.simantics.db.service.UndoRedoSupport;
  36 import org.simantics.utils.ui.workbench.WorkbenchUtils;
  37
  38 /**
  39  * @author Kalle Kondelin
  40  */
  41 public class SessionRedoHandler extends AbstractHandler {
  42
  43     private final boolean DEBUG = false;
  44
  45     @Override
  46     public Object execute(ExecutionEvent e) throws ExecutionException {
  47         if (DEBUG)
  48             System.out.println("--\nRedo handler called.");
  49
  50         IWorkbenchPart part = HandlerUtil.getActivePart(e);
  51         if (part == null)
  52             return null;
  53         IActionBars actionBars = WorkbenchUtils.getActionBars(part);
  54         final Session session = Simantics.peekSession();
  55         if (session == null)
  56             return null;
  57
  58         try {
  59             final AtomicReference<String> msg = new AtomicReference<String>();
  60             IRunnableWithProgress redo = new IRunnableWithProgress() {
  61                 @Override
  62                 public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
  63                     try {
  64                         monitor.beginTask("Redo", IProgressMonitor.UNKNOWN);
  65                         msg.set( redo( session ) );
  66                     } catch (NoHistoryException e) {
  67                         msg.set("Nothing to redo.");
  68                     } catch (DatabaseException e) {
  69                         throw new InvocationTargetException(e);
  70                     } finally {
  71                         monitor.done();
  72                     }
  73                 }
  74             };
  75
  76             // busyCursorWhile does not work because locking the session for undo
  77             // will also lock the UI completely.
  78             //PlatformUI.getWorkbench().getProgressService().busyCursorWhile(undo);
  79             Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
  80             new ProgressMonitorDialog(shell).run(true, false, redo);
  81             actionBars.getStatusLineManager().setMessage( msg.get() );
  82         } catch (InvocationTargetException e1) {
  83             throw new ExecutionException("Redo failed, database failure.", e1.getTargetException());
  84         } catch (InterruptedException e1) {
  85             throw new ExecutionException("Redo failed, interrupted.", e1);
  86         }
  87         return null;
  88     }
  89
  90     private String redo(Session session) throws DatabaseException {
  91         UndoRedoSupport support = session.getService(UndoRedoSupport.class);
  92         List<Operation> ops = support.redo(session, 1);
  93         if(ops.isEmpty())
  94             return "Nothing to redo.";
  95
  96         Operation mainOperation = ops.get(0);
  97
  98         String msg = null;
  99         long csId = mainOperation.getCSId();
 100
 101         ManagementSupport management = session.getService(ManagementSupport.class);
 102         for(ChangeSetIdentifier id : management.getChangeSetIdentifiers(csId, csId))
 103             if(msg == null)
 104                 msg = "Redid: " + SessionUndoHandler.getComment(session, id);
 105
 106         if (DEBUG)
 107             System.out.println(msg);
 108         return msg;
 109     }
 110
 111 }