bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/property/RestoreDefaultValueHandler.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.modeling.ui.property;
  13
  14 import java.util.List;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.ExecutionEvent;
  18 import org.eclipse.core.commands.ExecutionException;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.ui.IWorkbenchPart;
  21 import org.eclipse.ui.handlers.HandlerUtil;
  22 import org.eclipse.ui.part.IPage;
  23 import org.eclipse.ui.part.PageBookView;
  24 import org.simantics.browsing.ui.common.ErrorLogger;
  25 import org.simantics.browsing.ui.common.property.IProperty;
  26 import org.simantics.db.Resource;
  27 import org.simantics.db.WriteGraph;
  28 import org.simantics.db.common.CommentMetadata;
  29 import org.simantics.db.common.request.WriteRequest;
  30 import org.simantics.db.common.utils.NameUtils;
  31 import org.simantics.db.exception.DatabaseException;
  32 import org.simantics.db.layer0.variable.Variable;
  33 import org.simantics.db.management.ISessionContext;
  34 import org.simantics.ui.SimanticsUI;
  35 import org.simantics.ui.workbench.IPropertyPage;
  36 import org.simantics.utils.ui.ISelectionUtils;
  37
  38
  39 /**
  40  * @author Tuukka Lehtonen
  41  */
  42 public class RestoreDefaultValueHandler extends AbstractHandler {
  43
  44     IPage getCurrentPage(IWorkbenchPart part) {
  45         if (part instanceof PageBookView)
  46             return ((PageBookView) part).getCurrentPage();
  47         if (part instanceof org.simantics.browsing.ui.platform.PageBookView)
  48             return ((org.simantics.browsing.ui.platform.PageBookView) part).getCurrentPage();
  49         return null;
  50     }
  51
  52     @Override
  53     public Object execute(ExecutionEvent event) throws ExecutionException {
  54         // Cannot use this, since the property view does not contribute a selection back to the workbench.
  55         //HandlerUtil.getCurrentSelection(event);
  56
  57         ISessionContext sc = SimanticsUI.getSessionContext();
  58         if (sc == null)
  59             return null;
  60
  61         IWorkbenchPart part = HandlerUtil.getActivePartChecked(event);
  62         IPage page = getCurrentPage(part);
  63         if (page == null || !(page instanceof IPropertyPage))
  64             return null;
  65         IPropertyPage propPage = (IPropertyPage) page;
  66         ISelection sel = propPage.getSelection();
  67         if (sel == null)
  68             return null;
  69
  70         final List<Variable> vars = ISelectionUtils.filterSelection(sel, Variable.class);
  71         if (!vars.isEmpty()) {
  72             resetVariableProperties(sc, vars);
  73         } else {
  74             final List<IProperty> props = ISelectionUtils.filterSelection(sel, IProperty.class);
  75             if (!props.isEmpty())
  76                 resetLegacyProperties(sc, props);
  77         }
  78
  79         return null;
  80     }
  81
  82
  83     private void resetVariableProperties(ISessionContext sc, final List<Variable> vars) {
  84         // TODO: how to do this generically using only variables? How to remove a property value to let it be asserted again?
  85         sc.getSession().asyncRequest(new WriteRequest() {
  86             @Override
  87             public void perform(WriteGraph graph) throws DatabaseException {
  88                 CommentMetadata cm = graph.getMetadata(CommentMetadata.class);
  89                 for (Variable v : vars) {
  90 //                    Variable predicate = v.getPossiblePropertyValue(graph, Variables.PREDICATE);
  91 //                    if (predicate == null)
  92 //                        continue;
  93 //                    Resource predicateResource = predicate.getPossiblePropertyValue(graph, Variables.REPRESENTS);
  94 //                    if (predicateResource == null)
  95 //                        continue;
  96                         Resource predicateResource = v.getPossiblePredicateResource(graph);
  97                         if (predicateResource == null)
  98                                 continue;
  99                     Variable parent = v.getParent(graph);
 100                     if (parent == null)
 101                         continue;
 102                     Resource parentResource = parent.getPossibleRepresents(graph);
 103                     if (parentResource == null)
 104                         continue;
 105
 106 //                    System.out.println(parent.getURI(graph));
 107 //                    System.out.println(predicate.getURI(graph));
 108 //                    System.out.println(v.getURI(graph));
 109
 110                     graph.denyValue(parentResource, predicateResource);
 111                     cm.add("Restored default value for property " + NameUtils.getSafeName(graph, predicateResource));
 112                 }
 113                 graph.addMetadata(cm);
 114             }
 115         }, e -> {
 116             if (e != null)
 117                 ErrorLogger.defaultLogError("Failed to restore default property values, see exception for details.", e);
 118         });
 119     }
 120
 121     private boolean resetLegacyProperties(ISessionContext sc, final List<IProperty> props) {
 122         // Dry run to see if there's anything to remove before writing.
 123         boolean changes = false;
 124         for (IProperty cp : props) {
 125             if (IProperty.DIRECT.contains(cp.getType())) {
 126                 changes = true;
 127                 break;
 128             }
 129         }
 130         if (changes) {
 131             sc.getSession().asyncRequest(new WriteRequest() {
 132                 @Override
 133                 public void perform(WriteGraph graph) throws DatabaseException {
 134                     for (IProperty cp : props) {
 135                         if (IProperty.DIRECT.contains(cp.getType())) {
 136                             Resource[] data = cp.getData(Resource[].class);
 137                             graph.denyStatement(data[0], data[1], data[2]);
 138                         }
 139                     }
 140                 }
 141             }, e -> {
 142                 if (e != null)
 143                     ErrorLogger.defaultLogError("Failed to restore default property values, see exception for details.", e);
 144             });
 145         }
 146         return changes;
 147     }
 148
 149 }