1 /*******************************************************************************
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2 * Copyright (c) 2007, 2011 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.browsing.ui.graph.impl;
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14 import org.eclipse.jface.viewers.ISelection;
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15 import org.eclipse.ui.ISelectionListener;
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16 import org.eclipse.ui.ISelectionService;
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17 import org.eclipse.ui.IWorkbenchPage;
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18 import org.eclipse.ui.IWorkbenchPart;
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19 import org.eclipse.ui.IWorkbenchSite;
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20 import org.eclipse.ui.IWorkbenchWindow;
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21 import org.eclipse.ui.PlatformUI;
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22 import org.simantics.browsing.ui.GraphExplorer;
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23 import org.simantics.db.Disposable;
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24 import org.simantics.db.management.ISessionContext;
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25 import org.simantics.utils.ObjectUtils;
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28 * @author Antti Villberg
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30 public class WorkbenchSelectionInputSource implements WorkbenchSessionContextInputSource, ObservableInputSource,
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31 ISelectionListener, Disposable {
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33 protected ISelectionService service;
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34 protected Object selection;
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35 protected IWorkbenchPart part;
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36 protected IWorkbenchPart ownPart;
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37 protected InputSourceListener listener;
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40 public void init(IWorkbenchSite site, IWorkbenchPart ownPart) {
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41 this.ownPart = ownPart;
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42 attachToWorkbench();
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48 protected void attachToWorkbench() {
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49 IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
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52 service = window.getSelectionService();
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53 ISelection initialSelection = service.getSelection();
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54 IWorkbenchPart activePart = null;
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55 if (initialSelection != null) {
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56 IWorkbenchPage activePage = window.getActivePage();
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57 if (activePage != null)
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58 activePart = activePage.getActivePart();
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60 selectionChanged(activePart, initialSelection);
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61 service.addPostSelectionListener(this);
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68 public void dispose() {
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69 if (service != null)
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70 service.removePostSelectionListener(this);
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80 public void selectionChanged(IWorkbenchPart part, ISelection selection) {
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81 // Do not process selections from self
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82 if(ObjectUtils.objectEquals(ownPart, part)) return;
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83 Object old = this.selection;
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84 this.selection = selection;
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86 //System.err.println("WorkbenchSelectionInputSource.selectionChanged(" + part + ", " + this.selection + ")");
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87 fireIfInputChanged(old, selection);
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91 * @param oldSelection
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92 * @param newSelection
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95 protected void fireIfInputChanged(Object oldSelection, Object newSelection) {
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96 InputSourceListener l = listener;
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98 if (!ObjectUtils.objectEquals(oldSelection, newSelection))
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99 l.inputChanged(this);
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103 public Object get(ISessionContext ctx) {
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104 return selection != null ? selection : GraphExplorer.EMPTY_INPUT;
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108 public IWorkbenchPart getProvider() {
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113 public void setListener(InputSourceListener listener) {
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114 this.listener = listener;
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