bundles/org.simantics.ui/src/org/simantics/ui/workbench/handler/e4/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.e4;
  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.ExecutionException;
  18 import org.eclipse.core.runtime.IProgressMonitor;
  19 import org.eclipse.e4.core.contexts.Active;
  20 import org.eclipse.e4.core.di.annotations.CanExecute;
  21 import org.eclipse.e4.core.di.annotations.Execute;
  22 import org.eclipse.e4.ui.model.application.ui.basic.MPart;
  23 import org.eclipse.jface.action.IStatusLineManager;
  24 import org.eclipse.jface.dialogs.ProgressMonitorDialog;
  25 import org.eclipse.jface.operation.IRunnableWithProgress;
  26 import org.eclipse.swt.widgets.Shell;
  27 import org.eclipse.ui.IWorkbenchPart;
  28 import org.eclipse.ui.PlatformUI;
  29 import org.simantics.Simantics;
  30 import org.simantics.db.ChangeSetIdentifier;
  31 import org.simantics.db.Operation;
  32 import org.simantics.db.Session;
  33 import org.simantics.db.exception.DatabaseException;
  34 import org.simantics.db.exception.NoHistoryException;
  35 import org.simantics.db.service.ManagementSupport;
  36 import org.simantics.db.service.UndoRedoSupport;
  37 import org.simantics.utils.ui.workbench.WorkbenchUtils;
  38
  39 /**
  40  * @author Kalle Kondelin
  41  */
  42 public class SessionRedoHandler {
  43
  44     private final boolean DEBUG = false;
  45
  46     @CanExecute
  47     public boolean canExecute() {
  48         return UndoRedoTester.canRedo();
  49     }
  50
  51     @Execute
  52     public void execute(@Active MPart activePart) throws ExecutionException {
  53         if (DEBUG)
  54             System.out.println("--\nRedo handler called.");
  55
  56         if (activePart == null)
  57             return;
  58         final Session session = Simantics.peekSession();
  59         if (session == null)
  60             return;
  61
  62         try {
  63             final AtomicReference<String> msg = new AtomicReference<String>();
  64             IRunnableWithProgress redo = new IRunnableWithProgress() {
  65                 @Override
  66                 public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
  67                     try {
  68                         monitor.beginTask("Redo", IProgressMonitor.UNKNOWN);
  69                         msg.set( redo( session ) );
  70                     } catch (NoHistoryException e) {
  71                         msg.set("Nothing to redo.");
  72                     } catch (DatabaseException e) {
  73                         throw new InvocationTargetException(e);
  74                     } finally {
  75                         monitor.done();
  76                     }
  77                 }
  78             };
  79
  80             // busyCursorWhile does not work because locking the session for undo
  81             // will also lock the UI completely.
  82             //PlatformUI.getWorkbench().getProgressService().busyCursorWhile(undo);
  83             Shell shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
  84             new ProgressMonitorDialog(shell).run(true, false, redo);
  85
  86             //
  87             // TODO Not the Eclipse 4 way of using IStatusLineManager!
  88             // See:
  89             // https://bugs.eclipse.org/bugs/show_bug.cgi?id=332499
  90             // https://www.eclipse.org/forums/index.php?t=msg&th=367379&goto=941232&#msg_941232
  91             //
  92             IWorkbenchPart part = WorkbenchUtils.getActiveWorkbenchPart();
  93             IStatusLineManager manager = WorkbenchUtils.getStatusLine(part);
  94             manager.setMessage(msg.get());
  95 //            actionBars.getStatusLineManager().setMessage( msg.get() );
  96         } catch (InvocationTargetException e1) {
  97             throw new ExecutionException("Redo failed, database failure.", e1.getTargetException());
  98         } catch (InterruptedException e1) {
  99             throw new ExecutionException("Redo failed, interrupted.", e1);
 100         }
 101         return;
 102     }
 103
 104     private String redo(Session session) throws DatabaseException {
 105         UndoRedoSupport support = session.getService(UndoRedoSupport.class);
 106         List<Operation> ops = support.redo(session, 1);
 107         if(ops.isEmpty())
 108             return "Nothing to redo.";
 109
 110         Operation mainOperation = ops.get(0);
 111
 112         String msg = null;
 113         long csId = mainOperation.getCSId();
 114
 115         ManagementSupport management = session.getService(ManagementSupport.class);
 116         for(ChangeSetIdentifier id : management.getChangeSetIdentifiers(csId, csId))
 117             if(msg == null)
 118                 msg = "Redid: " + SessionUndoHandler.getComment(session, id);
 119
 120         if (DEBUG)
 121             System.out.println(msg);
 122         return msg;
 123     }
 124
 125 }