bundles/org.simantics.ui/src/org/simantics/ui/contribution/OperationsMenuContribution.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.ui.contribution;
  13
  14 import java.lang.ref.WeakReference;
  15 import java.util.ArrayList;
  16 import java.util.Collection;
  17
  18 import org.eclipse.jface.action.Action;
  19 import org.eclipse.jface.action.IAction;
  20 import org.eclipse.jface.resource.ImageDescriptor;
  21 import org.simantics.db.ReadGraph;
  22 import org.simantics.db.Resource;
  23 import org.simantics.db.Session;
  24 import org.simantics.db.exception.DatabaseException;
  25 import org.simantics.db.request.Read;
  26 import org.simantics.layer0.utils.collections.IContextualList;
  27 import org.simantics.layer0.utils.operations.IOperation;
  28 import org.simantics.project.IProject;
  29 import org.simantics.ui.SimanticsUI;
  30 import org.simantics.ui.icons.ImageUtil;
  31 import org.simantics.ui.selection.WorkbenchSelectionUtils;
  32 import org.simantics.ui.utils.ResourceAdaptionUtils;
  33 import org.simantics.utils.datastructures.persistent.ContextMap;
  34
  35
  36 public abstract class OperationsMenuContribution extends DynamicMenuContribution {
  37
  38     protected abstract Resource getListResource(ReadGraph g) throws Exception;
  39
  40     protected void assignParameters(ContextMap parameters) {
  41     }
  42
  43     @Override
  44     protected boolean preAcceptSelection(Object[] selection) {
  45         if(selection == null || selection.length != 1)
  46             return false;
  47         Resource r = ResourceAdaptionUtils.adaptToResource(selection[0]);
  48         return r != null;
  49     }
  50
  51     @Override
  52     protected IAction[] getActions(ReadGraph g, Object[] selection) throws DatabaseException {
  53         if(selection.length == 1) {
  54             final Resource r = WorkbenchSelectionUtils.getPossibleResourceFromSelection(g, selection[0]);
  55             if(r == null)
  56                 return NO_ACTIONS;
  57             try {
  58                 return g.syncRequest(new Read<IAction[]>() {
  59
  60                     @Override
  61                     public IAction[] perform(ReadGraph g) throws DatabaseException {
  62                         IContextualList list;
  63                         try {
  64                             list = g.adapt(getListResource(g), IContextualList.class);
  65                         } catch (Exception e) {
  66                             e.printStackTrace();
  67                             return null;
  68                         }
  69                         final ContextMap parameters = new ContextMap();
  70                         parameters.put(IOperation.SUBJECT, r);
  71                         IProject project = SimanticsUI.peekProject();
  72                         if (project != null)
  73                             parameters.put(IOperation.PROJECT, project.get());
  74                         assignParameters(parameters);
  75                         Collection<Resource> operations = new ArrayList<Resource>();
  76                         list.fill(g, parameters, operations);
  77
  78                         if(!operations.isEmpty()) {
  79                             IAction[] actions = new IAction[operations.size()];
  80                             int i=0;
  81                             for(Resource opRes : operations) {
  82                                 final IOperation op = g.adapt(opRes, IOperation.class);
  83                                 final ImageDescriptor imgDesc = ImageUtil.adaptImageDescriptor(g, opRes);
  84                                 final WeakReference<Session> sessionRef = new WeakReference<Session>(g.getSession());
  85                                 actions[i++] = new Action(op.getName(), imgDesc) {
  86
  87                                     @Override
  88                                     public void run() {
  89                                         Session session = sessionRef.get();
  90                                         if (session != null)
  91                                             op.exec(session, parameters);
  92                                     }
  93
  94                                 };
  95                             }
  96                             return actions;
  97                         } else {
  98                             return null;
  99                         }
 100                     }
 101
 102                 });
 103             } catch (DatabaseException e) {
 104                 e.printStackTrace();
 105             }
 106
 107         }
 108         return NO_ACTIONS;
 109     }
 110
 111 }