bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/property/TypicalPropertyTester.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2012 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 org.eclipse.core.expressions.PropertyTester;
  15 import org.eclipse.ui.IEditorInput;
  16 import org.eclipse.ui.IEditorPart;
  17 import org.simantics.DatabaseJob;
  18 import org.simantics.Simantics;
  19 import org.simantics.db.ReadGraph;
  20 import org.simantics.db.RequestProcessor;
  21 import org.simantics.db.Resource;
  22 import org.simantics.db.Session;
  23 import org.simantics.db.common.request.UniqueRead;
  24 import org.simantics.db.common.utils.RequestUtil;
  25 import org.simantics.db.exception.DatabaseException;
  26 import org.simantics.diagram.stubs.DiagramResource;
  27 import org.simantics.modeling.ModelingResources;
  28 import org.simantics.ui.SimanticsUI;
  29 import org.simantics.ui.workbench.IResourceEditorInput;
  30 import org.simantics.utils.ui.ErrorLogger;
  31
  32 /**
  33  * @author Tuukka Lehtonen
  34  */
  35 public class TypicalPropertyTester extends PropertyTester {
  36
  37
  38     /**
  39      * Tests if the received object is considered deletable.
  40      */
  41     private static final String IS_TYPICAL_MASTER_EDITOR = "isMasterEditor";
  42
  43     /**
  44      * Tests if the received object is considered modifiable.
  45      */
  46     private static final String IS_TYPICAL_INSTANCE_EDITOR = "isInstanceEditor";
  47
  48     @Override
  49     public boolean test(final Object receiver, final String property, final Object[] args, final Object expectedValue) {
  50         //System.out.println("TEST: " + receiver + ", " + property + ", " + Arrays.toString(args) + ", " + expectedValue);
  51
  52         try {
  53             Session session = Simantics.peekSession();
  54             if (session == null)
  55                 return false;
  56
  57             if (!(receiver instanceof IEditorPart))
  58                 return false;
  59             IEditorPart editor = (IEditorPart) receiver;
  60             IEditorInput in = editor.getEditorInput();
  61             if (!(in instanceof IResourceEditorInput))
  62                 return false;
  63             IResourceEditorInput input = (IResourceEditorInput) in;
  64             final Resource inputResource = input.getResource();
  65
  66             if (DatabaseJob.inProgress()) {
  67                 // See Apros issue #9115
  68                 // Return true because it is often possible that the database
  69                 // will be busy when these properties are tested. In such cases
  70                 // the handlers/menu contributions using these tests would
  71                 // become disabled unless we return true here. It is up to the
  72                 // handlers to also make sure that their input is valid.
  73                 return true;
  74             }
  75
  76             if (IS_TYPICAL_MASTER_EDITOR.equals(property)) {
  77                 return isTypicalMasterEditor(session, inputResource);
  78             } else if (IS_TYPICAL_INSTANCE_EDITOR.equals(property)) {
  79                 return isTypicalInstanceEditor(session, inputResource);
  80             }
  81         } catch (DatabaseException | InterruptedException e) {
  82             ErrorLogger.defaultLogError(e);
  83         }
  84
  85         return false;
  86     }
  87
  88     public static boolean isTypicalMasterEditor(RequestProcessor processor, final Resource editorInputResource) throws DatabaseException, InterruptedException {
  89         return RequestUtil.trySyncRequest(
  90                 Simantics.getSession(),
  91                 SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,
  92                 SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,
  93                 false,
  94                 new UniqueRead<Boolean>() {
  95             @Override
  96             public Boolean perform(ReadGraph graph) throws DatabaseException {
  97                 ModelingResources MOD = ModelingResources.getInstance(graph);
  98                 Resource composite = graph.getPossibleObject(editorInputResource, MOD.DiagramToComposite);
  99                 return composite != null
 100                         && graph.isInstanceOf(composite, MOD.MasterTypicalCompositeType);
 101             }
 102         });
 103     }
 104
 105     public static boolean isTypicalInstanceEditor(RequestProcessor processor, final Resource editorInputResource) throws DatabaseException, InterruptedException {
 106         return RequestUtil.trySyncRequest(
 107                 Simantics.getSession(),
 108                 SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,
 109                 SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,
 110                 false,
 111                 new UniqueRead<Boolean>() {
 112             @Override
 113             public Boolean perform(ReadGraph graph) throws DatabaseException {
 114                 DiagramResource DIA = DiagramResource.getInstance(graph);
 115                 ModelingResources MOD = ModelingResources.getInstance(graph);
 116                 return graph.isInstanceOf(editorInputResource, DIA.Diagram)
 117                         && graph.hasStatement(editorInputResource, MOD.HasDiagramSource);
 118             }
 119         });
 120     }
 121
 122 }