1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.modeling.ui.modelBrowser.handlers;
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14 import org.eclipse.core.commands.AbstractHandler;
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15 import org.eclipse.core.commands.ExecutionEvent;
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16 import org.eclipse.core.commands.ExecutionException;
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17 import org.eclipse.jface.viewers.ISelection;
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18 import org.eclipse.ui.PlatformUI;
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19 import org.eclipse.ui.handlers.HandlerUtil;
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20 import org.simantics.Simantics;
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21 import org.simantics.databoard.Bindings;
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22 import org.simantics.db.ReadGraph;
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23 import org.simantics.db.Resource;
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24 import org.simantics.db.common.request.ResourceRead;
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25 import org.simantics.db.common.utils.Logger;
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26 import org.simantics.db.exception.DatabaseException;
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27 import org.simantics.db.layer0.variable.Variable;
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28 import org.simantics.modeling.ModelingResources;
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29 import org.simantics.modeling.PropertyVariables;
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30 import org.simantics.ui.selection.WorkbenchSelectionUtils;
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31 import org.simantics.utils.ui.AdaptionUtils;
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33 public class ContextualHelp extends AbstractHandler {
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35 private static String getPossibleId(ExecutionEvent event) {
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38 Resource element = WorkbenchSelectionUtils.getPossibleResource(event);
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39 id = Simantics.getSession().syncRequest(new ResourceRead<String>(element) {
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42 public String perform(ReadGraph graph) throws DatabaseException {
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43 ModelingResources MOD = ModelingResources.getInstance(graph);
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44 Resource component = graph.getPossibleObject(element, MOD.ElementToComponent);
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45 if (component != null)
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46 return graph.getPossibleRelatedValue2(component, MOD.contextualHelpId, Bindings.STRING);
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48 Variable var = WorkbenchSelectionUtils.getPossibleVariable(event);
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50 return var.getPossiblePropertyValue(graph, MOD.contextualHelpId, Bindings.STRING);
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52 ISelection sel = HandlerUtil.getCurrentSelection(event);
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54 PropertyVariables vars = AdaptionUtils.adaptToSingle(sel, PropertyVariables.class);
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56 var = vars.getConfiguration();
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58 var.getPossiblePropertyValue(graph, MOD.contextualHelpId, Bindings.STRING);
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64 } catch (DatabaseException e) {
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65 Logger.defaultLogError(e);
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71 public Object execute(ExecutionEvent event) throws ExecutionException {
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73 String id = getPossibleId(event);
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75 PlatformUI.getWorkbench().getHelpSystem().displayHelp(id);
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