bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/actions/e4/EditStyleHandler.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.actions.e4;
  13
  14 import java.util.Arrays;
  15 import java.util.List;
  16
  17 import javax.inject.Named;
  18
  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.e4.ui.services.IServiceConstants;
  24 import org.eclipse.jface.viewers.ISelection;
  25 import org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor;
  26 import org.simantics.DatabaseJob;
  27 import org.simantics.Simantics;
  28 import org.simantics.db.ReadGraph;
  29 import org.simantics.db.Resource;
  30 import org.simantics.db.common.request.UnaryRead;
  31 import org.simantics.db.common.utils.RequestUtil;
  32 import org.simantics.db.exception.DatabaseException;
  33 import org.simantics.diagram.stubs.DiagramResource;
  34 import org.simantics.modeling.ui.actions.style.EditStyle;
  35 import org.simantics.modeling.ui.diagramEditor.DiagramEditor;
  36 import org.simantics.ui.SimanticsUI;
  37 import org.simantics.ui.utils.ResourceAdaptionUtils;
  38
  39 /**
  40  * Style Edit
  41  *
  42  * TODO : should we have extension point for expanding styles?
  43  * TODO : default ColorChooser is not suitable for this task
  44  * TODO : how to store MetricsFormat template list
  45  *
  46  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
  47  *
  48  */
  49 public class EditStyleHandler {
  50
  51     private Resource[] lastResources = Resource.NONE;
  52     private boolean cachedCanExecute;
  53
  54     @CanExecute
  55     public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection s, @Active MPart part) throws DatabaseException, InterruptedException {
  56         if (!(part.getObject() instanceof CompatibilityEditor))
  57             return false;
  58         CompatibilityEditor editor = (CompatibilityEditor) part.getObject();
  59         if (!(editor.getPart() instanceof DiagramEditor))
  60             return false;
  61         if (s == null)
  62             return false;
  63         if (DatabaseJob.inProgress())
  64             return false;
  65         final Resource[] resources = ResourceAdaptionUtils.toResources(s);
  66         if (resources.length != 0) {
  67             if (!Arrays.equals(resources, lastResources)) {
  68                 lastResources = resources;
  69                 cachedCanExecute = areStyleProviders(resources);
  70             }
  71             return cachedCanExecute;
  72         }
  73         return false;
  74     }
  75
  76     private static boolean areStyleProviders(Resource[] resources) throws DatabaseException, InterruptedException {
  77         return RequestUtil.trySyncRequest(
  78                 Simantics.getSession(),
  79                 SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,
  80                 SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,
  81                 false,
  82                 new StyleProviderCheck(Arrays.asList(resources)));
  83     }
  84
  85     private static class StyleProviderCheck extends UnaryRead<List<Resource>, Boolean> {
  86
  87         public StyleProviderCheck(List<Resource> parameter) {
  88             super(parameter);
  89         }
  90
  91         @Override
  92         public Boolean perform(ReadGraph graph) throws DatabaseException {
  93             DiagramResource DIA = DiagramResource.getInstance(graph);
  94             // Find what kind of styles selected objects support
  95             for (Resource r : parameter)
  96                 if (!graph.isInstanceOf(r, DIA.StyleProvider))
  97                     return false;
  98             return true;
  99         }
 100
 101     }
 102
 103     @Execute
 104     public void execute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection s) {
 105         final Resource[] resources = ResourceAdaptionUtils.toResources(s);
 106         if (resources.length != 0)
 107             EditStyle.openStyleDialog(resources);
 108     }
 109
 110 }