bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/DiagramViewer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2013 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  *     Semantum Oy - issue #4384
  12  *******************************************************************************/
  13 package org.simantics.modeling.ui.diagramEditor;
  14
  15 import java.awt.Color;
  16 import java.awt.dnd.DnDConstants;
  17 import java.util.Collections;
  18 import java.util.Set;
  19 import java.util.concurrent.TimeUnit;
  20 import java.util.function.Supplier;
  21
  22 import org.eclipse.core.runtime.Assert;
  23 import org.eclipse.core.runtime.IAdaptable;
  24 import org.eclipse.core.runtime.IProgressMonitor;
  25 import org.eclipse.core.runtime.SubMonitor;
  26 import org.eclipse.core.runtime.jobs.Job;
  27 import org.eclipse.jface.action.IStatusLineManager;
  28 import org.eclipse.jface.resource.JFaceResources;
  29 import org.eclipse.jface.resource.LocalResourceManager;
  30 import org.eclipse.swt.widgets.Composite;
  31 import org.eclipse.swt.widgets.Display;
  32 import org.eclipse.ui.IEditorInput;
  33 import org.eclipse.ui.IEditorSite;
  34 import org.eclipse.ui.IWorkbenchPartSite;
  35 import org.eclipse.ui.contexts.IContextService;
  36 import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
  37 import org.simantics.Simantics;
  38 import org.simantics.browsing.ui.model.browsecontexts.BrowseContext;
  39 import org.simantics.db.ReadGraph;
  40 import org.simantics.db.Resource;
  41 import org.simantics.db.Session;
  42 import org.simantics.db.WriteGraph;
  43 import org.simantics.db.common.primitiverequest.PossibleAdapter;
  44 import org.simantics.db.common.procedure.adapter.ListenerDelegate;
  45 import org.simantics.db.common.procedure.adapter.ListenerSupport;
  46 import org.simantics.db.common.request.ParametrizedRead;
  47 import org.simantics.db.common.request.WriteRequest;
  48 import org.simantics.db.common.utils.CommonDBUtils;
  49 import org.simantics.db.common.utils.TagUtil;
  50 import org.simantics.db.exception.DatabaseException;
  51 import org.simantics.db.layer0.request.combinations.Combinators;
  52 import org.simantics.db.management.ISessionContext;
  53 import org.simantics.db.management.ISessionContextProvider;
  54 import org.simantics.db.request.Read;
  55 import org.simantics.diagram.DiagramTypeUtils;
  56 import org.simantics.diagram.adapter.FlagClassFactory;
  57 import org.simantics.diagram.adapter.GraphToDiagramSynchronizer;
  58 import org.simantics.diagram.adapter.IDiagramLoader;
  59 import org.simantics.diagram.connection.ModelledConnectionAdvisor;
  60 import org.simantics.diagram.handler.ConnectionCommandHandler;
  61 import org.simantics.diagram.handler.CopyPasteHandler;
  62 import org.simantics.diagram.handler.CopyPasteStrategy;
  63 import org.simantics.diagram.handler.DefaultCopyPasteStrategy;
  64 import org.simantics.diagram.handler.DeleteHandler;
  65 import org.simantics.diagram.handler.ExpandSelectionHandler;
  66 import org.simantics.diagram.handler.SimpleElementTransformHandler;
  67 import org.simantics.diagram.layer.ILayersViewPage;
  68 import org.simantics.diagram.participant.ContextUtil;
  69 import org.simantics.diagram.participant.PointerInteractor2;
  70 import org.simantics.diagram.participant.SGFocusParticipant;
  71 import org.simantics.diagram.query.DiagramRequests;
  72 import org.simantics.diagram.runtime.RuntimeDiagramManager;
  73 import org.simantics.diagram.stubs.DiagramResource;
  74 import org.simantics.diagram.symbolcontribution.SymbolProviderFactory;
  75 import org.simantics.diagram.synchronization.CopyAdvisor;
  76 import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;
  77 import org.simantics.diagram.synchronization.SynchronizationHints;
  78 import org.simantics.diagram.synchronization.graph.DiagramGraphUtil;
  79 import org.simantics.diagram.ui.DiagramModelHints;
  80 import org.simantics.diagram.ui.SWTPopupMenuParticipant;
  81 import org.simantics.diagram.ui.SWTPopupMenuParticipantAwt;
  82 import org.simantics.diagram.ui.WorkbenchSelectionProvider;
  83 import org.simantics.g2d.canvas.Hints;
  84 import org.simantics.g2d.canvas.ICanvasContext;
  85 import org.simantics.g2d.canvas.ICanvasParticipant;
  86 import org.simantics.g2d.canvas.impl.CanvasContext;
  87 import org.simantics.g2d.chassis.AWTChassis;
  88 import org.simantics.g2d.chassis.ICanvasChassis;
  89 import org.simantics.g2d.chassis.IChassisListener;
  90 import org.simantics.g2d.chassis.SWTChassis;
  91 import org.simantics.g2d.connection.IConnectionAdvisor;
  92 import org.simantics.g2d.diagram.DiagramClass;
  93 import org.simantics.g2d.diagram.DiagramHints;
  94 import org.simantics.g2d.diagram.IDiagram;
  95 import org.simantics.g2d.diagram.handler.PickRequest.PickFilter;
  96 import org.simantics.g2d.diagram.impl.Diagram;
  97 import org.simantics.g2d.diagram.participant.DelayedBatchElementPainter;
  98 import org.simantics.g2d.diagram.participant.DiagramParticipant;
  99 import org.simantics.g2d.diagram.participant.ElementInteractor;
 100 import org.simantics.g2d.diagram.participant.ElementPainter;
 101 import org.simantics.g2d.diagram.participant.Selection;
 102 import org.simantics.g2d.diagram.participant.TerminalPainter;
 103 import org.simantics.g2d.diagram.participant.ZOrderHandler;
 104 import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
 105 import org.simantics.g2d.element.ElementClassProviders;
 106 import org.simantics.g2d.element.ElementClasses;
 107 import org.simantics.g2d.element.IElement;
 108 import org.simantics.g2d.element.IElementClassProvider;
 109 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
 110 import org.simantics.g2d.elementclass.connection.ConnectionClass;
 111 import org.simantics.g2d.page.DiagramDesc;
 112 import org.simantics.g2d.participant.BackgroundPainter;
 113 import org.simantics.g2d.participant.CanvasBoundsParticipant;
 114 import org.simantics.g2d.participant.CanvasGrab;
 115 import org.simantics.g2d.participant.GridPainter;
 116 import org.simantics.g2d.participant.KeyUtil;
 117 import org.simantics.g2d.participant.MouseUtil;
 118 import org.simantics.g2d.participant.Notifications;
 119 import org.simantics.g2d.participant.PageBorderParticipant;
 120 import org.simantics.g2d.participant.PanZoomRotateHandler;
 121 import org.simantics.g2d.participant.PointerPainter;
 122 import org.simantics.g2d.participant.RenderingQualityInteractor;
 123 import org.simantics.g2d.participant.RulerPainter;
 124 import org.simantics.g2d.participant.SymbolUtil;
 125 import org.simantics.g2d.participant.TimeParticipant;
 126 import org.simantics.g2d.participant.TransformUtil;
 127 import org.simantics.g2d.participant.WorkbenchStatusLine;
 128 import org.simantics.g2d.participant.ZoomToAreaHandler;
 129 import org.simantics.g2d.tooltip.TerminalTooltipParticipant;
 130 import org.simantics.g2d.utils.CanvasUtils;
 131 import org.simantics.layer0.utils.triggers.IActivation;
 132 import org.simantics.layer0.utils.triggers.IActivationManager;
 133 import org.simantics.modeling.ModelingResources;
 134 import org.simantics.modeling.mapping.ComponentCopyAdvisor;
 135 import org.simantics.modeling.mapping.ElementCopyAdvisor;
 136 import org.simantics.modeling.mapping.MappedElementCopyAdvisor;
 137 import org.simantics.modeling.mapping.ModelingSynchronizationHints;
 138 import org.simantics.modeling.ui.diagramEditor.handlers.LinkBrowsingHandler;
 139 import org.simantics.modeling.ui.diagramEditor.handlers.StructuralBrowsingHandler;
 140 import org.simantics.modeling.ui.preferences.DiagramPreferenceUtil;
 141 import org.simantics.modeling.ui.preferences.DiagramPreferences;
 142 import org.simantics.project.ontology.ProjectResource;
 143 import org.simantics.scenegraph.INode;
 144 import org.simantics.scenegraph.g2d.snap.GridSnapAdvisor;
 145 import org.simantics.scenegraph.utils.NodeUtil;
 146 import org.simantics.selectionview.StandardPropertyPage;
 147 import org.simantics.structural.stubs.StructuralResource2;
 148 import org.simantics.structural2.modelingRules.IModelingRules;
 149 import org.simantics.ui.SimanticsUI;
 150 import org.simantics.ui.jobs.SessionGarbageCollectorJob;
 151 import org.simantics.ui.workbench.IPropertyPage;
 152 import org.simantics.ui.workbench.IResourceEditorInput;
 153 import org.simantics.ui.workbench.IResourceEditorInput2;
 154 import org.simantics.ui.workbench.TitleRequest;
 155 import org.simantics.ui.workbench.TitleUpdater;
 156 import org.simantics.ui.workbench.ToolTipRequest;
 157 import org.simantics.ui.workbench.editor.input.InputValidationCombinators;
 158 import org.simantics.utils.DataContainer;
 159 import org.simantics.utils.datastructures.hints.HintContext;
 160 import org.simantics.utils.datastructures.hints.HintListenerAdapter;
 161 import org.simantics.utils.datastructures.hints.IHintContext;
 162 import org.simantics.utils.datastructures.hints.IHintContext.Key;
 163 import org.simantics.utils.datastructures.hints.IHintListener;
 164 import org.simantics.utils.datastructures.hints.IHintObservable;
 165 import org.simantics.utils.threads.AWTThread;
 166 import org.simantics.utils.threads.IThreadWorkQueue;
 167 import org.simantics.utils.threads.SWTThread;
 168 import org.simantics.utils.threads.ThreadUtils;
 169 import org.simantics.utils.ui.ErrorLogger;
 170 import org.simantics.utils.ui.ExceptionUtils;
 171
 172 import com.kitfox.svg.SVGCache;
 173
 174 /**
 175  * @author Toni Kalajainen
 176  * @author Tuukka Lehtonen
 177  */
 178 public class DiagramViewer
 179   //extends EditorPart implements IResourceEditorPart2,
 180     implements ListenerSupport, IAdaptable {
 181
 182     public interface DiagramViewerHost {
 183         void doSetPartName(String name);
 184         void doSetTitleToolTip(String name);
 185     }
 186
 187     public static final String                     DIAGRAMMING_CONTEXT      = "org.simantics.modeling.ui.diagramming";
 188     private static final String                     PREFERENCE_VIRTUAL_GRAPH = "preferences";
 189
 190     private static final boolean                    PROFILE                  = false;
 191
 192     ParametrizedRead<IResourceEditorInput, Boolean> INPUT_VALIDATOR =
 193         Combinators.compose(
 194                 InputValidationCombinators.or(
 195                         // Normal configuration diagrams of a model
 196                         Combinators.compose(
 197                                 InputValidationCombinators.hasURI(),
 198                                 InputValidationCombinators.partialFunction(ModelingResources.URIs.DiagramToComposite)
 199                         ),
 200                         // Configuration diagrams of a component type
 201                         Combinators.compose(
 202                                 InputValidationCombinators.hasURI(),
 203                                 Combinators.compose(
 204                                         InputValidationCombinators.partialFunction(StructuralResource2.URIs.Defines),
 205                                         InputValidationCombinators.partialFunction(ModelingResources.URIs.DiagramToComposite)
 206                                 )
 207                         )
 208                 ),
 209                 InputValidationCombinators.extractInputResource()
 210         );
 211
 212     protected EditorState                editorState;
 213
 214     protected boolean                    disposed           = false;
 215     protected IThreadWorkQueue           swt;
 216     protected IStatusLineManager         statusLineManager;
 217     protected Display                    display;
 218     protected LocalResourceManager       resourceManager;
 219     protected SWTChassis                 c;
 220     protected IDiagram                   sourceDiagram;
 221     protected DataContainer<IDiagram>    sourceDiagramContainer;
 222     protected CanvasContext              canvasContext;
 223     protected ISessionContextProvider    sessionContextProvider;
 224     protected ISessionContext            sessionContext;
 225     protected Resource                   diagramResource;
 226     protected GraphToDiagramSynchronizer synchronizer;
 227     protected IActivation                activation;
 228     protected ContextUtil                contextUtil;
 229     protected SWTPopupMenuParticipant    popupMenuParticipant;
 230
 231     protected DiagramPreferences         diagramPreferences;
 232     protected DiagramDesc                diagramDesc;
 233     protected GridSnapAdvisor            snapAdvisor;
 234
 235     private RuntimeDiagramManager        runtimeDiagramManager;
 236
 237     /**
 238      * Set externally in
 239      * {@link #init(DiagramViewerHost, IEditorSite, IEditorInput, DataContainer, WorkbenchSelectionProvider)}
 240      * .
 241      */
 242     protected WorkbenchSelectionProvider selectionProvider;
 243
 244     public Resource getRuntime() {
 245         RuntimeDiagramManager rtdm = runtimeDiagramManager;
 246         return (rtdm == null) ? null : rtdm.getRuntimeDiagram();
 247     }
 248
 249     public ParametrizedRead<IResourceEditorInput, Boolean> getInputValidator() {
 250         return INPUT_VALIDATOR;
 251     }
 252
 253     protected void addDropParticipants(ICanvasContext ctx) {
 254         ctx.getDefaultHintContext().setHint(Hints.KEY_ALLOWED_DRAG_ACTIONS, DnDConstants.ACTION_COPY);
 255
 256         ctx.add(new PopulateElementDropParticipant(synchronizer, getSite()));
 257         ctx.add(new PopulateElementMonitorDropParticipant(synchronizer, 0.5, 0.5));
 258     }
 259
 260     protected CopyPasteStrategy getCopyPasteStrategy() {
 261                 try {
 262                         CopyPasteStrategy cpStrategy = Simantics.getSession().syncRequest(new PossibleAdapter<CopyPasteStrategy>(getInputResource(), CopyPasteStrategy.class));
 263                         if(cpStrategy != null) return cpStrategy;
 264                 } catch (DatabaseException e) {
 265                 }
 266                 return getDefaultCopyPasteStrategy();
 267     }
 268
 269     protected CopyPasteStrategy getDefaultCopyPasteStrategy() {
 270         return new DefaultCopyPasteStrategy();
 271     }
 272
 273     protected CopyAdvisor getCopyAdvisor() {
 274                 try {
 275                         CopyAdvisor advisor = Simantics.getSession().syncRequest(new PossibleAdapter<CopyAdvisor>(getInputResource(), CopyAdvisor.class));
 276                         if(advisor != null) return advisor;
 277                 } catch (DatabaseException e) {
 278                 }
 279                 return new MappedElementCopyAdvisor(new ElementCopyAdvisor(), new ComponentCopyAdvisor());
 280     }
 281
 282     /**
 283      * @param ctx
 284      * TODO: change argument from CanvasContext to ICanvasContext
 285      */
 286     protected void addKeyBindingParticipants(CanvasContext ctx) {
 287         //ctx.add( new KeyToCommand( CommandKeyBinding.DEFAULT_BINDINGS ) );
 288         ctx.add(new DeleteHandler(statusLineManager));
 289         ctx.add(new CopyPasteHandler(getCopyPasteStrategy(), statusLineManager).setWorkbenchSite(getEditorSite()));
 290         ctx.add(new ConnectionCommandHandler());
 291     }
 292
 293     protected void addPopupmenu(ICanvasContext ctx) {
 294         ctx.add(popupMenuParticipant);
 295     }
 296
 297     protected void addWorkbenchSelectionProvider(ICanvasContext ctx) {
 298         if (selectionProvider != null)
 299             ctx.add(selectionProvider);
 300     }
 301
 302     protected void addViewManipulationParticipants(CanvasContext ctx) {
 303         ctx.add(new PanZoomRotateHandler());
 304         //ctx.add(new MousePanZoomInteractor());
 305         //ctx.add(new MultitouchPanZoomRotateInteractor());
 306         // ctx.add( new OrientationRestorer() );
 307         ctx.add(new ZoomToAreaHandler());
 308     }
 309
 310     protected void addDiagramParticipants(ICanvasContext ctx) {
 311         ctx.add(new ZOrderHandler());
 312         ctx.add(getPointerInteractor());
 313         ctx.add(new ElementInteractor());
 314         ctx.add(new Selection());
 315         ctx.add(new DiagramParticipant());
 316         ctx.add(new ElementPainter());
 317         //ctx.add(new ElementHeartbeater());
 318         //ctx.add(new ZoomTransitionParticipant(TransitionFunction.SIGMOID));
 319         //ctx.add(new TooltipParticipant());
 320         ctx.add(new TerminalTooltipParticipant());
 321     }
 322
 323     protected void addPainterParticipants(ICanvasContext ctx) {
 324         ctx.add(new RenderingQualityInteractor());
 325         ctx.add(new TerminalPainter(true, true, false, true));
 326         ctx.add(new DelayedBatchElementPainter(PickFilter.FILTER_MONITORS, 500, TimeUnit.MILLISECONDS));
 327     }
 328
 329     protected void addStructureParticipants(ICanvasContext ctx) {
 330         addWorkbenchSelectionProvider(ctx);
 331         // Add visual browsing capabilities for structural models
 332         ctx.add(new StructuralBrowsingHandler(getSite(), sessionContext, getResourceInput2()));
 333         ctx.add(new LinkBrowsingHandler(getSite(), this, sessionContext));
 334     }
 335
 336     /**
 337      * Override to add any diagram/canvas participants to the canvas context
 338      * initialized for the editor.
 339      *
 340      * @param ctx
 341      */
 342     protected void addOtherParticipants(CanvasContext ctx) {
 343     }
 344
 345     public static Set<String> defaultPropertyBrowseContexts = Collections.singleton(ProjectResource.URIs.ProjectBrowseContext);
 346
 347     protected Set<String> getPropertyPageContexts() {
 348         try {
 349             return BrowseContext.getBrowseContextClosure(SimanticsUI.getSession(), defaultPropertyBrowseContexts);
 350         } catch (DatabaseException e) {
 351             ExceptionUtils.logAndShowError("Failed to load modeled browse contexts for property page, see exception for details.", e);
 352             return defaultPropertyBrowseContexts;
 353         }
 354     }
 355
 356     protected IPropertyPage createPropertyPage(IWorkbenchPartSite site, Set<String> contexts) {
 357         return new StandardPropertyPage(site, contexts);
 358     }
 359
 360     protected String getPopupId() {
 361         return "#ModelingDiagramPopup";
 362     }
 363
 364     protected void getPreferences() {
 365         this.diagramPreferences = DiagramPreferenceUtil.getPreferences();
 366     }
 367
 368     protected void initSession() {
 369         sessionContextProvider = SimanticsUI.getSessionContextProvider();
 370         sessionContext = sessionContextProvider.getSessionContext();
 371     }
 372
 373     protected void readNames() {
 374         String name = getEditorInput().getName();
 375         host.doSetPartName(name);
 376         host.doSetTitleToolTip(name);
 377     }
 378
 379     class ChassisListener implements IChassisListener {
 380         @Override
 381         public void chassisClosed(ICanvasChassis sender) {
 382             // Prevent deadlock while disposing which using syncExec would result in.
 383             final ICanvasContext ctx = canvasContext;
 384             ThreadUtils.asyncExec(ctx.getThreadAccess(), new Runnable() {
 385                 @Override
 386                 public void run() {
 387                     if (ctx != null) {
 388                         saveEditorState(ctx);
 389                         ctx.getHintStack().removeKeyHintListener(GridPainter.KEY_GRID_ENABLED, canvasHintListener);
 390                         ctx.getHintStack().removeKeyHintListener(RulerPainter.KEY_RULER_ENABLED, canvasHintListener);
 391                         final AWTChassis awtChassis = c.getAWTComponent();
 392                         if (awtChassis != null)
 393                             awtChassis.setCanvasContext(null);
 394                         ctx.dispose();
 395                     }
 396
 397                     if (sourceDiagramContainer != null) {
 398                         sourceDiagramContainer.set(null);
 399                         sourceDiagramContainer = null;
 400                     }
 401
 402                     if (sourceDiagram != null)
 403                         sourceDiagram.dispose();
 404
 405                     if(synchronizer != null) {
 406                         synchronizer.dispose();
 407                         // Let GC work.
 408                         synchronizer = null;
 409                     }
 410
 411                     if (runtimeDiagramManager != null) {
 412                         runtimeDiagramManager.dispose();
 413                         runtimeDiagramManager = null;
 414                     }
 415                 }
 416             });
 417             c.removeChassisListener(ChassisListener.this);
 418         }
 419     }
 420
 421     protected void createChassis(Composite parent) {
 422         resourceManager = new LocalResourceManager(JFaceResources.getResources(), parent);
 423         c = new SWTChassis(parent, 0);
 424
 425         Object task = BEGIN("DV.precreateParticipants");
 426         createCustomParticipants();
 427         END(task);
 428
 429         c.populate(component -> {
 430             if (!disposed) {
 431                 c.addChassisListener(new ChassisListener());
 432                 initializeCanvas();
 433             }
 434         });
 435     }
 436
 437     protected void beforeSetCanvasContext(ICanvasContext canvasContext2) {
 438     }
 439
 440     /**
 441      * Invoke this only from the AWT thread.
 442      * @param context
 443      */
 444     protected void setCanvasContext(ICanvasContext context) {
 445         // Cannot directly invoke SWTChassis.setCanvasContext only because it
 446         // needs to be invoked in the SWT thread and AWTChassis.setCanvasContext in the
 447         // AWT thread, but directly invoking SWTChassis.setCanvasContext would call both
 448         // in the SWT thread which would cause synchronous scheduling of AWT
 449         // runnables which is always a potential source of deadlocks.
 450         c.getAWTComponent().setCanvasContext(canvasContext);
 451         swt.asyncExec(new Runnable() {
 452             @Override
 453             public void run() {
 454                 if (!c.isDisposed())
 455                     // For AWT, this is a no-operation.
 456                     c.setCanvasContext(canvasContext);
 457             }
 458         });
 459     }
 460
 461     public void createPartControl(Composite parent) {
 462         //ProfileObserver.begin = System.nanoTime();
 463         display = parent.getDisplay();
 464         swt = SWTThread.getThreadAccess(display);
 465         statusLineManager = getEditorSite().getActionBars().getStatusLineManager();
 466
 467         Object task = BEGIN("DV.initSession");
 468         initSession();
 469         END(task);
 470
 471         diagramResource = getInputResource();
 472         readNames();
 473         getPreferences();
 474
 475         try {
 476             this.runtimeDiagramManager = RuntimeDiagramManager.track(sessionContext.getSession(), diagramResource, getEditorInput(), this);
 477
 478             // Create the canvas context here before finishing createPartControl
 479             // to give DiagramViewerActionContributor a chance to work.
 480             // The context can be created in SWT thread without scheduling
 481             // to the context thread and having potential deadlocks.
 482             IThreadWorkQueue thread = AWTThread.getThreadAccess();
 483             this.canvasContext = new CanvasContext(thread);
 484             this.canvasContext.setLocked(true);
 485
 486             task = BEGIN("DV.createChassis");
 487             createChassis(parent);
 488             END(task);
 489         } catch (DatabaseException e) {
 490             ErrorLogger.defaultLogError(e);
 491         }
 492     }
 493
 494
 495         /**
 496      * A method invoked before chassis construction for creating such
 497      * {@link ICanvasParticipant}s that need to be constructed in the SWT
 498      * thread.
 499      *
 500      * Use it for creating any such canvas participants during the viewer
 501      * construction and add them to the {@link ICanvasContext} later on from
 502      * the AWT thread.
 503      */
 504     protected void createCustomParticipants() {
 505         if (SimanticsUI.isLinuxGTK()) {
 506                 popupMenuParticipant = new SWTPopupMenuParticipantAwt(getSite(), c, display, getPopupId());
 507         } else {
 508                 popupMenuParticipant = new SWTPopupMenuParticipant(getSite(), c, display, getPopupId());
 509         }
 510     }
 511
 512     /**
 513      * Invoke this only from the AWT thread.
 514      */
 515     protected void initializeCanvas() {
 516         Object canvasInit = BEGIN("DV.canvasInitialization");
 517
 518         Object task = BEGIN("DV.createViewerCanvas");
 519         initializeCanvasContext(canvasContext);
 520         END(task);
 521
 522         beforeSetCanvasContext(canvasContext);
 523         //FullscreenUtils.addFullScreenHandler(canvasContext, s, canvasProvider);
 524
 525         // Without this all diagram participants will crash like there's no tomorrow.
 526         // Just trying to keep the behavior a bit more sane in case of
 527         // errors instead of flooding the console with exceptions.
 528         canvasContext.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, Diagram.spawnNew(DiagramClass.DEFAULT));
 529
 530         // Changes in ruler/grid activity shall be written as
 531         // workspace-persistent diagram-specific preferences.
 532         canvasContext.getHintStack().addKeyHintListener(GridPainter.KEY_GRID_ENABLED, canvasHintListener);
 533         canvasContext.getHintStack().addKeyHintListener(RulerPainter.KEY_RULER_ENABLED, canvasHintListener);
 534
 535         task = BEGIN("DV.setCanvasContext");
 536         setCanvasContext(canvasContext);
 537         END(task);
 538
 539         // Finish loading in a worker thread because it may be a time consuming
 540         // process to load a large diagram and we don't want unnecessary AWT
 541         // thread contention.
 542         Job loadJob = new DiagramViewerLoadJob(this);
 543         loadJob.schedule();
 544
 545         END(canvasInit);
 546     }
 547
 548     protected void activateUiContexts(ContextUtil util) {
 549         util.activate(DIAGRAMMING_CONTEXT);
 550     }
 551
 552     /**
 553      * @param monitor the progress monitor to use for reporting progress to the
 554      *        user. It is the caller's responsibility to call done() on the
 555      *        given monitor. Accepts <code>null</code>, indicating that no
 556      *        progress should be reported and that the operation cannot be
 557      *        cancelled.
 558      */
 559     protected void performActivation(IProgressMonitor monitor) {
 560         SubMonitor progress = SubMonitor.convert(monitor, "Activate Mapping", 100);
 561         IActivationManager activationManager = sessionContext.getSession().peekService(IActivationManager.class);
 562         if (activationManager != null) {
 563             activation = activationManager.activate(diagramResource);
 564         }
 565         progress.worked(100);
 566     }
 567
 568     protected void onCreated() {
 569     }
 570
 571     /**
 572      * @param diagram
 573      */
 574     protected void scheduleZoomToFit(IDiagram diagram) {
 575         if (diagram == null)
 576             throw new IllegalStateException("diagram is null");
 577
 578         CanvasUtils.scheduleZoomToFit(swt, () -> disposed, canvasContext, diagram);
 579     }
 580
 581     /**
 582      * Subclasses may override but should always invoke super.
 583      *
 584      * @param diagram
 585      * @param initialHints
 586      * @throws DatabaseException
 587      */
 588     protected void fillInitialDiagramHints(Resource diagram, IHintContext initialHints) throws DatabaseException {
 589         IModelingRules modelingRules = sessionContext.getSession().syncRequest(
 590                 DiagramRequests.getModelingRules(diagram, null));
 591         if (modelingRules != null) {
 592             initialHints.setHint(DiagramModelHints.KEY_MODELING_RULES, modelingRules);
 593             initialHints.setHint(DiagramHints.CONNECTION_ADVISOR,
 594                     getConnectionAdvisor(modelingRules, sessionContext.getSession()));
 595         }
 596
 597         initialHints.setHint(SynchronizationHints.COPY_ADVISOR, getCopyAdvisor());
 598         initialHints.setHint(DiagramHints.KEY_USE_CONNECTION_FLAGS, Boolean.TRUE);
 599         initialHints.setHint(DiagramHints.KEY_ALLOW_CONNECTION_BRANCHING, Boolean.TRUE);
 600         initialHints.setHint(DiagramHints.KEY_ALLOW_ROUTE_POINTS, Boolean.TRUE);
 601     }
 602
 603     /**
 604      * @param monitor the progress monitor to use for reporting progress to the
 605      *        user. It is the caller's responsibility to call done() on the
 606      *        given monitor. Accepts <code>null</code>, indicating that no
 607      *        progress should be reported and that the operation cannot be
 608      *        cancelled.
 609      * @param r
 610      * @return
 611      * @throws DatabaseException
 612      */
 613     protected IDiagram loadDiagram(IProgressMonitor monitor, final Resource r) throws DatabaseException {
 614         // Pre-load modeling rules and possibly other hints too since they are
 615         // needed already while loading the diagram contents.
 616         IHintContext initialHints = new HintContext();
 617         fillInitialDiagramHints(r, initialHints);
 618         IDiagram d = loadDiagram(monitor, r, initialHints);
 619         return d;
 620     }
 621
 622     /**
 623      * @param monitor the progress monitor to use for reporting progress to the
 624      *        user. It is the caller's responsibility to call done() on the
 625      *        given monitor. Accepts <code>null</code>, indicating that no
 626      *        progress should be reported and that the operation cannot be
 627      *        cancelled.
 628      * @param diagram
 629      * @param initialHints
 630      * @return
 631      * @throws DatabaseException
 632      */
 633     protected IDiagram loadDiagram(IProgressMonitor monitor, Resource diagram, IHintContext initialHints) throws DatabaseException {
 634         RuntimeDiagramManager rtdm = runtimeDiagramManager;
 635         Resource runtimeDiagram = rtdm != null ? rtdm.getRuntimeDiagram() : null;
 636         IDiagramLoader loader = synchronizer;
 637         if (rtdm == null || runtimeDiagram == null || loader == null)
 638                 return null;
 639         IDiagram d = sessionContext.getSession().syncRequest(
 640                 DiagramRequests.loadDiagram(monitor, getResourceInput2().getModel(null), diagram,
 641                         runtimeDiagram, null, loader, initialHints));
 642         return d;
 643     }
 644
 645     protected void beforeSetDiagram(IDiagram diagram) {
 646     }
 647
 648     protected PointerInteractor getPointerInteractor() {
 649         return new PointerInteractor2(true, true, true, false, true, false, synchronizer.getElementClassProvider());
 650     }
 651
 652     protected IConnectionAdvisor getConnectionAdvisor(IModelingRules modelingRules, Session session) {
 653         return new ModelledConnectionAdvisor(modelingRules, sessionContext.getSession());
 654     }
 655
 656     protected GraphToDiagramSynchronizer createSynchronizer(final ICanvasContext ctx, final ISessionContext sessionContext) {
 657         try {
 658             return sessionContext.getSession().syncRequest(new Read<GraphToDiagramSynchronizer>() {
 659                 @Override
 660                 public GraphToDiagramSynchronizer perform(ReadGraph graph) throws DatabaseException {
 661                     GraphToDiagramSynchronizer sync = new GraphToDiagramSynchronizer(graph, ctx, createElementClassProvider(graph));
 662                     initializeSynchronizationContext(graph, sync);
 663                     return sync;
 664                 }
 665             });
 666         } catch (DatabaseException e) {
 667             throw new UnsupportedOperationException("Failed to initialize data model synchronizer", e);
 668         }
 669     }
 670
 671     protected void initializeSynchronizationContext(ReadGraph graph, IModifiableSynchronizationContext context) {
 672         context.set(ModelingSynchronizationHints.MODELING_RESOURCE, ModelingResources.getInstance(graph));
 673     }
 674
 675     protected IElementClassProvider createElementClassProvider(ReadGraph graph) {
 676         DiagramResource dr = DiagramResource.getInstance(graph);
 677         return ElementClassProviders.mappedProvider(
 678                 ElementClasses.CONNECTION, ConnectionClass.CLASS.newClassWith(new StaticObjectAdapter(dr.RouteGraphConnection)),
 679                 ElementClasses.FLAG, FlagClassFactory.createFlagClass(dr.Flag, dr.Flag_Terminal)
 680         );
 681     }
 682
 683     protected SimpleElementTransformHandler getTransformHandler() {
 684         return new SimpleElementTransformHandler(true, true, true);
 685     }
 686
 687     public void initializeCanvasContext(CanvasContext ctx) {
 688         IHintContext h = ctx.getDefaultHintContext();
 689
 690         // The canvas context should not be painted until it is ready to avoid
 691         // unnecessary visual glitches.
 692         h.setHint(Hints.KEY_DISABLE_PAINTING, Boolean.TRUE);
 693
 694         Object task = BEGIN("createSynchronizer");
 695         this.synchronizer = createSynchronizer(ctx, sessionContext);
 696         END(task);
 697
 698         IContextService contextService = (IContextService) getSite().getService(IContextService.class);
 699         contextUtil = new ContextUtil(contextService, swt);
 700
 701         // Support & Util Participants
 702         ctx.add(new TransformUtil());
 703         ctx.add(new MouseUtil());
 704         ctx.add(new KeyUtil());
 705         ctx.add(contextUtil);
 706         ctx.add(new WorkbenchStatusLine(statusLineManager));
 707         ctx.add(new CanvasGrab());
 708         ctx.add(new SymbolUtil());
 709         ctx.add(new TimeParticipant());
 710         ctx.add(new CanvasBoundsParticipant());
 711         ctx.add(new Notifications());
 712
 713         ctx.add(new SGFocusParticipant(c, DIAGRAMMING_CONTEXT));
 714
 715         // Debug participant(s)
 716         // ctx.add( new PointerPainter() );
 717         // ctx.add( new HandPainter() );
 718         h.setHint(PointerPainter.KEY_PAINT_POINTER, true);
 719
 720         // Pan & Zoom & Rotate
 721         addViewManipulationParticipants(ctx);
 722
 723         ctx.add(getTransformHandler());
 724         ctx.add(new ExpandSelectionHandler(getEditorSite().getActionBars().getStatusLineManager()));
 725
 726         // Key bindings
 727         addKeyBindingParticipants(ctx);
 728
 729         // Grid & Ruler & Background
 730         ctx.add(new GridPainter());
 731         ctx.add(new RulerPainter());
 732         ctx.add(new BackgroundPainter());
 733
 734         h.setHint(Hints.KEY_DISPLAY_PAGE, diagramPreferences.get(DiagramPreferences.P_DISPLAY_PAGE_SIZE));
 735         h.setHint(Hints.KEY_DISPLAY_MARGINS, diagramPreferences.get(DiagramPreferences.P_DISPLAY_MARGINS));
 736         ctx.add(new PageBorderParticipant());
 737
 738         // h.setHint(Hints.KEY_GRID_COLOR, new Color(0.9f, 0.9f, 0.9f));
 739         // h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.LIGHT_GRAY);
 740         h.setHint(Hints.KEY_GRID_COLOR, new Color(0.9f, 0.9f, 0.9f));
 741         h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.WHITE);
 742         h.setHint(RulerPainter.KEY_RULER_BACKGROUND_COLOR, new Color(0.9f, 0.9f, 0.9f, 0.75f));
 743         h.setHint(RulerPainter.KEY_RULER_TEXT_COLOR, Color.BLACK);
 744
 745         ////// Diagram Participants //////
 746         addDiagramParticipants(ctx);
 747         addPainterParticipants(ctx);
 748
 749         /////// D'n'D ///////
 750         addDropParticipants(ctx);
 751
 752         h.setHint(ElementPainter.KEY_SELECTION_FRAME_COLOR, Color.MAGENTA);
 753         h.setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 754
 755         h.setHint(PanZoomRotateHandler.KEY_ZOOM_IN_LIMIT, 100000.0);
 756         h.setHint(PanZoomRotateHandler.KEY_ZOOM_OUT_LIMIT, 10.0);
 757
 758         Double snapResolution = diagramPreferences.get(DiagramPreferences.P_SNAP_GRID_SIZE);
 759         this.snapAdvisor = new GridSnapAdvisor(snapResolution);
 760         h.setHint(DiagramHints.SNAP_ADVISOR, this.snapAdvisor);
 761         h.setHint(GridPainter.KEY_GRID_SIZE, snapResolution);
 762         h.setHint(GridPainter.KEY_GRID_ENABLED, Boolean.FALSE);
 763
 764         // Workbench selection provider
 765         addStructureParticipants(ctx);
 766
 767         // Pop-up menu
 768         addPopupmenu(ctx);
 769
 770         // Load page frame description settings
 771         loadPageSettings(ctx);
 772
 773         addOtherParticipants(ctx);
 774
 775         ctx.assertParticipantDependencies();
 776         ctx.setLocked(false);
 777     }
 778
 779     protected void loadPageSettings(ICanvasContext ctx) {
 780         DiagramDesc diagramDesc = null;
 781
 782         // load diagram page configuration
 783         if (diagramResource != null) {
 784             try {
 785                 diagramDesc = sessionContext.getSession().syncRequest(DiagramRequests.getDiagramDesc(diagramResource));
 786             } catch (DatabaseException e) {
 787                 ErrorLogger.defaultLogError(e);
 788             }
 789         }
 790
 791         if (diagramDesc == null) {
 792             // Take page description from the preferences if nothing else is available.
 793             final DiagramDesc desc = diagramDesc = diagramPreferences.getDiagramDesc();
 794
 795             // Write page configuration to graph
 796             sessionContext.getSession().asyncRequest(new WriteRequest() {
 797                 @Override
 798                 public void perform(WriteGraph graph) throws DatabaseException {
 799                     if (graph.isImmutable(diagramResource))
 800                         return;
 801                     CommonDBUtils.selectClusterSet(graph, diagramResource);
 802                     DiagramGraphUtil.setDiagramDesc(graph, diagramResource, desc);
 803                 }
 804             }, parameter -> {
 805                 if (parameter != null)
 806                     ErrorLogger.defaultLogError("Failed to write default diagram page description to database, see exception for details", parameter);
 807             });
 808         }
 809
 810         setDiagramDesc(ctx, diagramDesc);
 811
 812         // Create a listener to react to page setting changes.
 813         sessionContext.getSession().asyncRequest(DiagramRequests.getDiagramDesc(diagramResource),
 814                 new ListenerDelegate<DiagramDesc>(this) {
 815             @Override
 816             public void execute(final DiagramDesc result) {
 817                 if (result != null && canvasContext != null) {
 818                     ThreadUtils.asyncExec(canvasContext.getThreadAccess(), new Runnable() {
 819                         @Override
 820                         public void run() {
 821                             if (!disposed)
 822                                 setDiagramDesc(canvasContext, result);
 823                         }
 824                     });
 825                 }
 826             }
 827         });
 828     }
 829
 830     protected void setDiagramDesc(ICanvasContext ctx, DiagramDesc diagramDesc) {
 831         if (diagramDesc == null)
 832             throw new NullPointerException("null diagram desc");
 833
 834         if (diagramDesc.equals(this.diagramDesc))
 835             return;
 836
 837         this.diagramDesc = diagramDesc;
 838         IHintContext hints = ctx.getDefaultHintContext();
 839         hints.setHint(Hints.KEY_PAGE_DESC, diagramDesc.getPageDesc());
 840         hints.setHint(Hints.KEY_DISPLAY_PAGE, diagramDesc.isPageBordersVisible());
 841         hints.setHint(Hints.KEY_DISPLAY_MARGINS, diagramDesc.isMarginsVisible());
 842         hints.setHint(GridPainter.KEY_GRID_ENABLED, diagramDesc.isGridVisible());
 843         hints.setHint(RulerPainter.KEY_RULER_ENABLED, diagramDesc.isRulerVisible());
 844         snapAdvisor.setResolution(diagramDesc.getGridSize());
 845         hints.setHint(GridPainter.KEY_GRID_SIZE, diagramDesc.getGridSize());
 846     }
 847
 848     /**
 849      * Must be invoked from the AWT thread only.
 850      *
 851      * @param state
 852      * @param ctx
 853      */
 854     protected void applyEditorState(final EditorState state, final ICanvasContext ctx) {
 855         final IDiagram diagram = ctx.getHintStack().getHint(DiagramHints.KEY_DIAGRAM);
 856
 857         if (state.viewTransform != null && state.viewTransform.getDeterminant() != 0) {
 858             for (PanZoomRotateHandler h : ctx.getItemsByClass(PanZoomRotateHandler.class)) {
 859                 h.setTransform(state.viewTransform);
 860             }
 861         }
 862
 863         if (diagram != null) {
 864             if (state.viewTransform != null)
 865                 diagram.removeHint(DiagramHints.KEY_INITIAL_ZOOM_TO_FIT);
 866
 867             if (state.toolMode != null)
 868                 ctx.getDefaultHintContext().setHint(Hints.KEY_TOOL, state.toToolMode());
 869             else
 870                 ctx.getDefaultHintContext().setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 871
 872             final Set<IElement> selected = DiagramEditorStates.toElements(state.selection, diagram);
 873             if (!selected.isEmpty()) {
 874                 for (Selection s : ctx.getItemsByClass(Selection.class)) {
 875                     s.setSelection(0, selected);
 876                 }
 877             }
 878         }
 879     }
 880
 881     protected EditorState getSavedEditorState(ICanvasContext ctx) {
 882         return DiagramEditorStates.toEditorState(ctx, true, true, true);
 883     }
 884
 885     protected void saveEditorState(ICanvasContext ctx) {
 886         DiagramEditorStates.saveEditorState(PREFERENCE_VIRTUAL_GRAPH, diagramResource, getSavedEditorState(ctx) , DiagramViewer.this);
 887     }
 888
 889     private boolean firstFocus = true;
 890
 891     public void setFocus() {
 892
 893         if(c != null) {
 894                 c.setFocus();
 895
 896                 if (firstFocus) {
 897                     // This is a workaround for using the symbol viewer in multi-page
 898                     // editors which causes the first zoom-to-fit scheduling to happen
 899                     // already before the controls have been laid out properly.
 900                     firstFocus = false;
 901                     firstTimeSetFocus();
 902                 }
 903
 904         }
 905
 906     }
 907
 908     protected void firstTimeSetFocus() {
 909         // [Tuukka@2010-02-11]
 910         // Removed since this is actually a workaround for multi-page editors.
 911         //scheduleZoomToFit();
 912     }
 913
 914     public void dispose() {
 915         // Deactivate all contexts here because after this the context service
 916         // in question will not be available.
 917         if (contextUtil != null) {
 918             contextUtil.deactivateAll();
 919         }
 920
 921         disposed = true;
 922         if (activation != null) {
 923             activation.deactivate();
 924             activation = null;
 925         }
 926
 927         if (resourceManager != null) {
 928                 resourceManager.dispose();
 929                 resourceManager = null;
 930         }
 931         //super.dispose();
 932     }
 933
 934     protected Resource getInputResource() {
 935         return getResourceInput().getResource();
 936     }
 937
 938     public IResourceEditorInput getResourceInput() {
 939         return (IResourceEditorInput) getEditorInput();
 940     }
 941
 942     public IResourceEditorInput2 getResourceInput2() {
 943         return (IResourceEditorInput2) getEditorInput();
 944     }
 945
 946     public void init(DiagramViewerHost _host, IEditorSite site, IEditorInput input, DataContainer<IDiagram> diagramContainer, WorkbenchSelectionProvider selectionProvider) {
 947         if (!(input instanceof IResourceEditorInput))
 948             throw new RuntimeException("Invalid input: must be IResourceEditorInput");
 949
 950         setHost(_host);
 951         setSite(site);
 952         setInput(input);
 953         this.sourceDiagramContainer = diagramContainer;
 954         this.selectionProvider = selectionProvider;
 955
 956         // Set initial part name according to the name given by IEditorInput
 957         host.doSetPartName(getEditorInput().getName());
 958
 959         Session session = SimanticsUI.peekSession();
 960         if (session != null) {
 961             Supplier<Boolean> disposedCallback = () -> disposed;
 962             session.asyncRequest(
 963                     new TitleRequest(site.getId(), getResourceInput()),
 964                     new TitleUpdater(site.getShell().getDisplay(), host::doSetPartName, disposedCallback));
 965             session.asyncRequest(
 966                     new ToolTipRequest(site.getId(), getResourceInput()),
 967                     new TitleUpdater(site.getShell().getDisplay(), host::doSetTitleToolTip, disposedCallback));
 968         }
 969
 970         try {
 971             // Read previous editor state from the database
 972             editorState = DiagramEditorStates.readEditorState(getInputResource());
 973         } catch (DatabaseException e) {
 974             exception(e);
 975         }
 976     }
 977
 978     @SuppressWarnings("unchecked")
 979     @Override
 980     public <T> T getAdapter(Class<T> adapter) {
 981 //        System.out.println("diagramViewer getAdapter " + adapter);
 982         // Property view support
 983         if (adapter == IPropertyPage.class)
 984             return (T) createPropertyPage(getSite(), getPropertyPageContexts());
 985         // Provide symbols for the editor
 986         if (adapter == SymbolProviderFactory.class) {
 987             try {
 988                 return (T) DiagramTypeUtils.readSymbolProviderFactory(sessionContext.getSession(), diagramResource);
 989             } catch (DatabaseException e) {
 990                 ErrorLogger.defaultLogError(getClass() + " failed to adapt to SymbolProviderFactory, see exception for details.", e);
 991                 return null;
 992             }
 993         }
 994         // Outline view support
 995         if (adapter == IContentOutlinePage.class)
 996             return (T) new DiagramOutlinePage(sessionContextProvider, getResourceInput2());
 997         // Role view support
 998         if (adapter == ILayersViewPage.class)
 999             return (T) new DiagramLayersPage(sourceDiagram, canvasContext);
1000         // Support external steering of the diagram canvas, zooming etc.
1001         if (adapter == ICanvasContext.class)
1002             return (T) canvasContext;
1003         // Support scene graph debugger view
1004         if (adapter == INode.class) {
1005             if (canvasContext != null) {
1006                 INode node = canvasContext.getCanvasNode();
1007                 if (node != null)
1008                     return (T) NodeUtil.getRootNode(node);
1009             }
1010             return null;
1011         }
1012         // Support retrieval of the current diagram.
1013         if (adapter == IDiagram.class)
1014             return (T) sourceDiagram;
1015         // Why is this here ??
1016         if (adapter == Session.class)
1017             return (T) sessionContext.getSession();
1018         if(adapter == RuntimeDiagramManager.class)
1019             return (T) runtimeDiagramManager;
1020         if (adapter == Resource.class)
1021             return (T) getRuntime();
1022         if (adapter == ICanvasChassis.class)
1023             return (T) c;
1024
1025         return null;
1026     }
1027
1028     //-------------------------------------------------------------------------
1029     // Profiling aid
1030
1031     protected static Object BEGIN(String name) {
1032         if (PROFILE) {
1033             //return ThreadLog.BEGIN(name);
1034         }
1035         return null;
1036     }
1037
1038     protected static void END(Object task) {
1039         if (PROFILE) {
1040             //((Task) task).end();
1041         }
1042     }
1043
1044     //-------------------------------------------------------------------------
1045     // implement ListenerSupport
1046
1047     @Override
1048     public void exception(Throwable t) {
1049         ErrorLogger.defaultLogError(t);
1050     }
1051
1052     @Override
1053     public boolean isDisposed() {
1054         return disposed;
1055     }
1056
1057     protected void collectGarbage() {
1058         SessionGarbageCollectorJob.getInstance().schedule(0);
1059         AWTThread.getThreadAccess().asyncExec(new Runnable() {
1060             @Override
1061             public void run() {
1062                 //System.out.println("BEFORE CLEAR: " + SVGCache.getSVGUniverse().report());
1063                 SVGCache.getSVGUniverse().clearUnreferenced();
1064                 //System.out.println("AFTER CLEAR: " + SVGCache.getSVGUniverse().report());
1065             }
1066         });
1067     }
1068
1069     //-------------------------------------------------------------------------
1070     // Listener for certain canvas context hint changes
1071
1072     IHintListener canvasHintListener = new HintListenerAdapter() {
1073         @Override
1074         public void hintChanged(IHintObservable sender, Key key, Object oldValue, Object newValue) {
1075             if (key == GridPainter.KEY_GRID_ENABLED) {
1076                 boolean v = Boolean.TRUE.equals(newValue);
1077                 if (diagramDesc.isGridVisible() != v)
1078                     setGlobalPreference(DiagramResource.URIs.DisplayGrid, v);
1079             } else if (key == RulerPainter.KEY_RULER_ENABLED) {
1080                 boolean v = Boolean.TRUE.equals(newValue);
1081                 if (diagramDesc.isRulerVisible() != v)
1082                     setGlobalPreference(DiagramResource.URIs.DisplayRuler, v);
1083             }
1084         }
1085     };
1086
1087     private <T> void setGlobalPreference(final String preferenceURI, boolean value) {
1088         TagUtil.execute(Simantics.getSession(), PREFERENCE_VIRTUAL_GRAPH, preferenceURI, value, Simantics.getProjectResource());
1089     }
1090
1091     /*
1092      * --------------------------------------------------------------------
1093      * Changes related to removal of EditorPart extension from here on down
1094      * --------------------------------------------------------------------
1095      */
1096
1097     private IWorkbenchPartSite partSite;
1098     private DiagramViewerHost host;
1099     private IEditorInput editorInput = null;
1100
1101     /* (non-Javadoc)
1102      * Method declared on IWorkbenchPart.
1103      */
1104     public IWorkbenchPartSite getSite() {
1105         return partSite;
1106     }
1107
1108     public IEditorSite getEditorSite() {
1109         return (IEditorSite) getSite();
1110     }
1111
1112     public IEditorInput getEditorInput() {
1113         return editorInput;
1114     }
1115
1116 //    protected void setPartName(String partName) {
1117 ////        if (compatibilityTitleListener != null) {
1118 ////            removePropertyListener(compatibilityTitleListener);
1119 ////            compatibilityTitleListener = null;
1120 ////        }
1121 ////
1122 ////        super.setPartName(partName);
1123 //    }
1124
1125 //    protected void setTitleToolTip(String toolTip) {
1126 ////        toolTip = Util.safeString(toolTip);
1127 ////        //Do not send changes if they are the same
1128 ////        if (Util.equals(this.toolTip, toolTip)) {
1129 ////                    return;
1130 ////            }
1131 ////        this.toolTip = toolTip;
1132 ////        firePropertyChange(IWorkbenchPart.PROP_TITLE);
1133 //    }
1134
1135     protected void setHost(DiagramViewerHost host) {
1136         this.host = host;
1137     }
1138
1139     protected void setSite(IWorkbenchPartSite site) {
1140         this.partSite = site;
1141     }
1142
1143     protected void setInput(IEditorInput input) {
1144         Assert.isLegal(input != null);
1145         editorInput = input;
1146     }
1147
1148     public Composite getComposite() {
1149         return c;
1150     }
1151
1152 }