bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/SheetViewer.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.lang.reflect.InvocationTargetException;
  17 import java.util.function.Supplier;
  18
  19 import org.eclipse.core.runtime.IProgressMonitor;
  20 import org.eclipse.core.runtime.SubMonitor;
  21 import org.eclipse.core.runtime.preferences.IEclipsePreferences.IPreferenceChangeListener;
  22 import org.eclipse.core.runtime.preferences.IEclipsePreferences.PreferenceChangeEvent;
  23 import org.eclipse.jface.action.IStatusLineManager;
  24 import org.eclipse.jface.operation.IRunnableWithProgress;
  25 import org.eclipse.swt.widgets.Composite;
  26 import org.eclipse.ui.IEditorInput;
  27 import org.eclipse.ui.IEditorSite;
  28 import org.eclipse.ui.PartInitException;
  29 import org.eclipse.ui.PlatformUI;
  30 import org.eclipse.ui.contexts.IContextService;
  31 import org.eclipse.ui.part.EditorPart;
  32 import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
  33 import org.simantics.db.ReadGraph;
  34 import org.simantics.db.Resource;
  35 import org.simantics.db.Session;
  36 import org.simantics.db.common.ResourceArray;
  37 import org.simantics.db.exception.DatabaseException;
  38 import org.simantics.db.management.ISessionContext;
  39 import org.simantics.db.management.ISessionContextProvider;
  40 import org.simantics.db.request.Read;
  41 import org.simantics.diagram.adapter.DefaultConnectionClassFactory;
  42 import org.simantics.diagram.adapter.FlagClassFactory;
  43 import org.simantics.diagram.adapter.GraphToDiagramSynchronizer;
  44 import org.simantics.diagram.handler.ConnectionCommandHandler;
  45 import org.simantics.diagram.handler.CopyPasteHandler;
  46 import org.simantics.diagram.handler.DeleteHandler;
  47 import org.simantics.diagram.handler.ExpandSelectionHandler;
  48 import org.simantics.diagram.handler.SimpleElementTransformHandler;
  49 import org.simantics.diagram.layer.ILayersViewPage;
  50 import org.simantics.diagram.participant.ContextUtil;
  51 import org.simantics.diagram.participant.SGFocusParticipant;
  52 import org.simantics.diagram.query.DiagramRequests;
  53 import org.simantics.diagram.stubs.DiagramResource;
  54 import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;
  55 import org.simantics.diagram.synchronization.graph.DiagramGraphUtil;
  56 import org.simantics.diagram.ui.SWTPopupMenuParticipant;
  57 import org.simantics.g2d.canvas.Hints;
  58 import org.simantics.g2d.canvas.ICanvasContext;
  59 import org.simantics.g2d.canvas.impl.CanvasContext;
  60 import org.simantics.g2d.chassis.SWTChassis;
  61 import org.simantics.g2d.diagram.DiagramClass;
  62 import org.simantics.g2d.diagram.DiagramHints;
  63 import org.simantics.g2d.diagram.IDiagram;
  64 import org.simantics.g2d.diagram.impl.Diagram;
  65 import org.simantics.g2d.diagram.participant.DiagramParticipant;
  66 import org.simantics.g2d.diagram.participant.ElementInteractor;
  67 import org.simantics.g2d.diagram.participant.ElementPainter;
  68 import org.simantics.g2d.diagram.participant.Selection;
  69 import org.simantics.g2d.diagram.participant.TerminalPainter;
  70 import org.simantics.g2d.diagram.participant.ZOrderHandler;
  71 import org.simantics.g2d.diagram.participant.pointertool.PointerInteractor;
  72 import org.simantics.g2d.element.ElementClassProviders;
  73 import org.simantics.g2d.element.ElementClasses;
  74 import org.simantics.g2d.element.IElementClassProvider;
  75 import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
  76 import org.simantics.g2d.participant.CanvasBoundsParticipant;
  77 import org.simantics.g2d.participant.CanvasGrab;
  78 import org.simantics.g2d.participant.KeyUtil;
  79 import org.simantics.g2d.participant.MouseUtil;
  80 import org.simantics.g2d.participant.MultitouchPanZoomRotateInteractor;
  81 import org.simantics.g2d.participant.Notifications;
  82 import org.simantics.g2d.participant.PageBorderParticipant;
  83 import org.simantics.g2d.participant.PanZoomRotateHandler;
  84 import org.simantics.g2d.participant.PointerPainter;
  85 import org.simantics.g2d.participant.RulerPainter;
  86 import org.simantics.g2d.participant.SymbolUtil;
  87 import org.simantics.g2d.participant.TimeParticipant;
  88 import org.simantics.g2d.participant.TransformUtil;
  89 import org.simantics.g2d.participant.ZoomToAreaHandler;
  90 import org.simantics.layer0.utils.triggers.IActivation;
  91 import org.simantics.layer0.utils.triggers.IActivationManager;
  92 import org.simantics.modeling.ModelingResources;
  93 import org.simantics.modeling.mapping.ModelingSynchronizationHints;
  94 import org.simantics.modeling.ui.diagramEditor.handlers.WorkbenchStructuralSelectionProvider;
  95 import org.simantics.modeling.ui.preferences.DiagramPreferenceUtil;
  96 import org.simantics.modeling.ui.preferences.DiagramPreferences;
  97 import org.simantics.scenegraph.INode;
  98 import org.simantics.scenegraph.g2d.snap.GridSnapAdvisor;
  99 import org.simantics.scenegraph.utils.NodeUtil;
 100 import org.simantics.selectionview.StandardPropertyPage;
 101 import org.simantics.ui.SimanticsUI;
 102 import org.simantics.ui.workbench.IPropertyPage;
 103 import org.simantics.ui.workbench.IResourceEditorInput;
 104 import org.simantics.ui.workbench.IResourceEditorInput2;
 105 import org.simantics.ui.workbench.IResourceEditorPart2;
 106 import org.simantics.ui.workbench.ResourceEditorSupport;
 107 import org.simantics.ui.workbench.TitleRequest;
 108 import org.simantics.ui.workbench.TitleUpdater;
 109 import org.simantics.ui.workbench.ToolTipRequest;
 110 import org.simantics.utils.DataContainer;
 111 import org.simantics.utils.datastructures.hints.IHintContext;
 112 import org.simantics.utils.page.PageDesc;
 113 import org.simantics.utils.threads.AWTThread;
 114 import org.simantics.utils.threads.IThreadWorkQueue;
 115 import org.simantics.utils.threads.SWTThread;
 116 import org.simantics.utils.threads.ThreadUtils;
 117 import org.simantics.utils.ui.ErrorLogger;
 118
 119 /**
 120  * @author Toni Kalajainen
 121  * @author Tuukka Lehtonen
 122  */
 123 public class SheetViewer extends EditorPart implements IResourceEditorPart2 {
 124
 125     private static final boolean         PROFILE            = false;
 126
 127     protected boolean                    disposed           = false;
 128     protected IThreadWorkQueue           swt;
 129     protected IStatusLineManager         statusLineManager;
 130     protected SWTChassis                 c;
 131     protected IDiagram                   sourceDiagram;
 132     protected ICanvasContext             canvasContext;
 133     protected ResourceEditorSupport      support;
 134     protected ISessionContextProvider    sessionContextProvider;
 135     protected ISessionContext            sessionContext;
 136     protected Resource                   diagramResource;
 137     protected GraphToDiagramSynchronizer synchronizer;
 138     protected IActivation                activation;
 139     protected ContextUtil                contextUtil;
 140
 141     protected DiagramPreferences         diagramPreferences;
 142     protected GridSnapAdvisor            snapAdvisor;
 143
 144     public ResourceArray                 structuralPath;
 145
 146     IPreferenceChangeListener preferenceListener = new IPreferenceChangeListener() {
 147         @Override
 148         public void preferenceChange(PreferenceChangeEvent event) {
 149             String value = (String) event.getNewValue();
 150             if (DiagramPreferences.P_SNAP_GRID_SIZE.equals(event.getKey())) {
 151                 double grid = DiagramPreferences.DEFAULT_SNAP_GRID_SIZE;
 152                 if (value != null)
 153                     grid = Double.parseDouble(value);
 154                 snapAdvisor.setResolution(grid);
 155             } else if (DiagramPreferences.P_DEFAULT_PAGE_SIZE.equals(event.getKey())) {
 156                 PageDesc pageDesc = PageDesc.deserialize(value, DiagramPreferences.DEFAULT_PAGE_SIZE);
 157                 //System.out.println("new page desc: " + pageDesc);
 158                 canvasContext.getDefaultHintContext().setHint(Hints.KEY_PAGE_DESC, pageDesc);
 159             } else if (DiagramPreferences.P_DISPLAY_PAGE_SIZE.equals(event.getKey())) {
 160                 Boolean display = value != null ? Boolean.parseBoolean(value) : DiagramPreferences.DEFAULT_DISPLAY_PAGE_SIZE;
 161                 canvasContext.getDefaultHintContext().setHint(Hints.KEY_DISPLAY_PAGE, display);
 162             } else if (DiagramPreferences.P_DISPLAY_MARGINS.equals(event.getKey())) {
 163                 Boolean display = value != null ? Boolean.parseBoolean(value) : DiagramPreferences.DEFAULT_DISPLAY_MARGINS;
 164                 canvasContext.getDefaultHintContext().setHint(Hints.KEY_DISPLAY_MARGINS, display);
 165             }
 166         }
 167     };
 168
 169     protected void addDropParticipants(ICanvasContext ctx) {
 170         // FIXME This is a workaround so that this participant can be disabled
 171         // for SymbolViewer
 172         ctx.add(new PopulateElementDropParticipant(synchronizer));
 173         ctx.add(new PopulateElementMonitorDropParticipant(synchronizer, 0.5, 0.5));
 174     }
 175
 176     protected void addKeyBindingParticipants(CanvasContext ctx) {
 177         //ctx.add( new KeyToCommand( CommandKeyBinding.DEFAULT_BINDINGS ) );
 178         ctx.add(new DeleteHandler(statusLineManager));
 179         ctx.add(new CopyPasteHandler(statusLineManager));
 180         ctx.add(new ConnectionCommandHandler());
 181     }
 182
 183     protected void addPopupmenu(ICanvasContext ctx) {
 184         ctx.add(new SWTPopupMenuParticipant(getSite(), c, getPopupId()));
 185     }
 186
 187     protected void addStructureParticipants(ICanvasContext ctx) {
 188         structuralPath = getResourceInput().getResourceArray().removeFromBeginning(1);
 189
 190         ctx.add(new WorkbenchStructuralSelectionProvider(swt, getSite(), structuralPath));
 191         // Add visual browsing capabilities for structural models
 192 //        ctx.add(new StructuralBrowsingHandler(getSite(), sessionContext, structuralPath));
 193 //        ctx.add(new LinkBrowsingHandler(getSite(), this, sessionContext));
 194     }
 195
 196     protected String getPopupId() {
 197         return "#ModelingDiagramPopup";
 198     }
 199
 200     protected void getPreferences() {
 201         this.diagramPreferences = DiagramPreferenceUtil.getPreferences();
 202     }
 203
 204     protected void initSession() {
 205         sessionContextProvider = SimanticsUI.getSessionContextProvider();
 206         sessionContext = sessionContextProvider.getSessionContext();
 207     }
 208
 209     protected void readNames() {
 210         String name = getEditorInput().getName();
 211         setPartName(name);
 212         setTitleToolTip(name);
 213     }
 214
 215     protected void createChassis(Composite parent) {
 216         c = new SWTChassis(parent, 0);
 217         c.syncPopulate();
 218     }
 219
 220     protected void setCanvasContext(ICanvasContext context) {
 221         c.setCanvasContext(canvasContext);
 222     }
 223
 224     @Override
 225     public void createPartControl(Composite parent) {
 226         swt = SWTThread.getThreadAccess(parent.getDisplay());
 227         statusLineManager = getEditorSite().getActionBars().getStatusLineManager();
 228
 229         Object task = BEGIN("DV.initSession");
 230         initSession();
 231         END(task);
 232
 233         diagramResource = getInputResource();
 234         readNames();
 235         getPreferences();
 236
 237         task = BEGIN("DV.createChassis");
 238         createChassis(parent);
 239         END(task);
 240
 241         initializeCanvas();
 242
 243         // Start tracking changes in diagram preferences.
 244         diagramPreferences.preferences.addPreferenceChangeListener(preferenceListener);
 245     }
 246
 247     protected void initializeCanvas() {
 248         Object canvasInit = BEGIN("DV.canvasInitialization");
 249
 250         Object task = BEGIN("DV.createViewerCanvas");
 251 //        ThreadUtils.syncExec(AWTThread.getThreadAccess(), new Runnable() {
 252 //            @Override
 253 //            public void run() {
 254         canvasContext = createViewerCanvas();
 255 //            }
 256 //        });
 257         END(task);
 258
 259         //FullscreenUtils.addFullScreenHandler(canvasContext, s, canvasProvider);
 260
 261         task = BEGIN("DV.setCanvasContext");
 262         setCanvasContext(canvasContext);
 263         END(task);
 264
 265         try {
 266             task = BEGIN("DV.loadDiagram");
 267             sourceDiagram = loadDiagram(diagramResource);
 268             END(task);
 269
 270             // Zoom to fit
 271             task = BEGIN("DV.scheduleZoomToFit");
 272
 273 //            canvasContext.getDefaultHintContext().setHint(Hints.KEY_CANVAS_TRANSFORM, new AffineTransform());
 274 //            canvasContext.getContentContext().setDirty();
 275             scheduleZoomToFit();
 276
 277             END(task);
 278
 279             // Start an activation for the input resource.
 280             // This will activate mapping if necessary.
 281             task = BEGIN("DV.performActivation");
 282             performActivation();
 283             END(task);
 284
 285             task = BEGIN("DV.activate context");
 286             contextUtil.activate(DiagramViewer.DIAGRAMMING_CONTEXT);
 287             END(task);
 288
 289             task = BEGIN("DV.onCreated");
 290             onCreated();
 291             END(task);
 292
 293         } catch (DatabaseException e) {
 294             ErrorLogger.defaultLogError(e);
 295
 296             // Without this all diagram participants will crash like there's no tomorrow.
 297             // Just trying to keep the behavior a bit more sane in case of
 298             // errors instead of flooding the console with exceptions.
 299             canvasContext.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, Diagram.spawnNew(DiagramClass.DEFAULT));
 300         }
 301         END(canvasInit);
 302     }
 303
 304     protected void performActivation() {
 305
 306         IActivationManager activationManager = sessionContext.getSession().peekService(IActivationManager.class);
 307         if (activationManager != null) {
 308             activation = activationManager.activate(diagramResource);
 309         }
 310
 311     }
 312
 313     protected void scheduleZoomToFit() {
 314         if (sourceDiagram == null)
 315             throw new IllegalStateException("source diagram is null");
 316
 317         sourceDiagram.setHint(Hints.KEY_DISABLE_PAINTING, Boolean.TRUE);
 318         sourceDiagram.setHint(DiagramHints.KEY_INITIAL_ZOOM_TO_FIT, Boolean.TRUE);
 319         ThreadUtils.asyncExec(swt, new Runnable() {
 320             @Override
 321             public void run() {
 322                 if (disposed)
 323                     return;
 324
 325                 // System.out.println("size: " + c.getSize());
 326                 ThreadUtils.asyncExec(canvasContext.getThreadAccess(), new Runnable() {
 327                     @Override
 328                     public void run() {
 329                         if (disposed)
 330                             return;
 331                         // System.out.println("fit diagram to view");
 332                         sourceDiagram.removeHint(Hints.KEY_DISABLE_PAINTING);
 333                         /*Boolean zoomToFit =*/ sourceDiagram.removeHint(DiagramHints.KEY_INITIAL_ZOOM_TO_FIT);
 334                         canvasContext.getDefaultHintContext().removeHint(Hints.KEY_DISABLE_PAINTING);
 335
 336 //                        if (Boolean.TRUE.equals(zoomToFit))
 337 //                            CanvasUtils.sendCommand(canvasContext, Commands.ZOOM_TO_FIT);
 338
 339                         canvasContext.getContentContext().setDirty();
 340                     }
 341                 });
 342             }
 343         });
 344     }
 345
 346
 347
 348     protected IDiagram loadDiagram(final Resource r) throws DatabaseException {
 349         final DataContainer<IDiagram> dc = new DataContainer<IDiagram>();
 350         //dc.set( loadDiagram(new NullProgressMonitor(), r) );
 351         try {
 352             PlatformUI.getWorkbench().getProgressService().busyCursorWhile(new IRunnableWithProgress() {
 353                 @Override
 354                 public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
 355                     SubMonitor mon = SubMonitor.convert(monitor, "Loading Diagram", 100);
 356                     try {
 357                         dc.set( loadDiagram(mon.newChild(100), r) );
 358                     } catch (DatabaseException e) {
 359                         throw new InvocationTargetException(e);
 360                     } finally {
 361                         monitor.done();
 362                     }
 363                 }
 364             });
 365         } catch (InvocationTargetException e) {
 366             Throwable t = e.getTargetException();
 367             if (t instanceof DatabaseException)
 368                 throw (DatabaseException) t;
 369             throw new DatabaseException(t);
 370         } catch (InterruptedException e) {
 371             throw new DatabaseException(e);
 372         }
 373         return dc.get();
 374     }
 375
 376     protected IDiagram loadDiagram(IProgressMonitor monitor, Resource r) throws DatabaseException {
 377         SubMonitor mon = SubMonitor.convert(monitor, "Loading Diagram", 100);
 378
 379         Object task = BEGIN("DV.DiagramLoadQuery");
 380         IDiagram d = sessionContext.getSession().syncRequest(DiagramRequests.loadDiagram(mon.newChild(100), getResourceInput2().getModel(null), r, null, structuralPath, synchronizer, null));
 381         END(task);
 382
 383         task = BEGIN("DV.setDiagramHint");
 384         canvasContext.getDefaultHintContext().setHint(DiagramHints.KEY_DIAGRAM, d);
 385         END(task);
 386
 387         task = BEGIN("DV.set other hints");
 388         // Setup a copy advisor for the synchronizer
 389         //d.setHint(SynchronizationHints.COPY_ADVISOR, new MappedElementCopyAdvisor(new ComponentCopyAdvisor()));
 390         d.setHint(DiagramHints.KEY_USE_CONNECTION_FLAGS, Boolean.FALSE);
 391         d.setHint(DiagramHints.KEY_ALLOW_CONNECTION_BRANCHING, Boolean.FALSE);
 392         d.setHint(DiagramHints.KEY_ALLOW_ROUTE_POINTS, Boolean.FALSE);
 393         END(task);
 394
 395         return d;
 396     }
 397
 398     protected GraphToDiagramSynchronizer createSynchronizer(final ICanvasContext ctx, final ISessionContext sessionContext) {
 399         try {
 400             return sessionContext.getSession().syncRequest(new Read<GraphToDiagramSynchronizer>() {
 401                 @Override
 402                 public GraphToDiagramSynchronizer perform(ReadGraph graph) throws DatabaseException {
 403                     GraphToDiagramSynchronizer sync = new GraphToDiagramSynchronizer(graph, ctx, createElementClassProvider(graph));
 404                     initializeSynchronizationContext(graph, sync);
 405                     return sync;
 406                 }
 407             });
 408         } catch (DatabaseException e) {
 409             throw new UnsupportedOperationException("Failed to initialize data model synchronizer", e);
 410         }
 411     }
 412
 413     protected void initializeSynchronizationContext(ReadGraph graph, IModifiableSynchronizationContext context) {
 414         context.set(ModelingSynchronizationHints.MODELING_RESOURCE, ModelingResources.getInstance(graph));
 415     }
 416
 417     protected IElementClassProvider createElementClassProvider(ReadGraph graph) {
 418         DiagramResource dr = DiagramResource.getInstance(graph);
 419         return ElementClassProviders.mappedProvider(
 420                 ElementClasses.CONNECTION, DefaultConnectionClassFactory.CLASS.newClassWith(new StaticObjectAdapter(dr.Connection)),
 421                 ElementClasses.FLAG, FlagClassFactory.createFlagClass(dr.Flag, dr.Flag_Terminal)
 422         );
 423     }
 424
 425     public ICanvasContext createViewerCanvas() {
 426         IThreadWorkQueue thread = AWTThread.getThreadAccess();
 427         CanvasContext ctx = new CanvasContext(thread);
 428         IHintContext h = ctx.getDefaultHintContext();
 429
 430         Object task = BEGIN("createSynchronizer");
 431         this.synchronizer = createSynchronizer(ctx, sessionContext);
 432         END(task);
 433
 434         IContextService contextService = (IContextService) getSite().getService(IContextService.class);
 435         contextUtil = new ContextUtil(contextService, swt);
 436
 437         ctx.add(new PanZoomRotateHandler()); // Must be before TransformUtil
 438
 439         // Support & Util Participants
 440         ctx.add(new TransformUtil());
 441         ctx.add(new MouseUtil());
 442         ctx.add(new KeyUtil());
 443         ctx.add(contextUtil);
 444         ctx.add(new CanvasGrab());
 445         ctx.add(new SymbolUtil());
 446         ctx.add(new TimeParticipant());
 447         ctx.add(new CanvasBoundsParticipant());
 448         ctx.add(new Notifications());
 449
 450         ctx.add( new SGFocusParticipant(c, DiagramViewer.DIAGRAMMING_CONTEXT) );
 451
 452         // Debug participant(s)
 453         // ctx.add( new PointerPainter() );
 454         // ctx.add( new HandPainter() );
 455         h.setHint(PointerPainter.KEY_PAINT_POINTER, true);
 456
 457         // Pan & Zoom & Rotate
 458         ctx.add(new MultitouchPanZoomRotateInteractor());
 459         // ctx.add( new OrientationRestorer() );
 460         ctx.add(new ZoomToAreaHandler());
 461         ctx.add(new SimpleElementTransformHandler(true, true, true));
 462         ctx.add(new ExpandSelectionHandler(getEditorSite().getActionBars().getStatusLineManager()));
 463
 464         // Key bindings
 465         addKeyBindingParticipants(ctx);
 466
 467         // Grid & Ruler & Background
 468 //        ctx.add(new GridPainter());
 469 //        ctx.add(new RulerPainter());
 470 //        ctx.add(new BackgroundPainter());
 471
 472
 473         h.setHint(PanZoomRotateHandler.KEY_ADAPT_VIEWPORT_TO_RESIZED_CONTROL, Boolean.FALSE);
 474         h.setHint(Hints.KEY_DISPLAY_PAGE, diagramPreferences.get(DiagramPreferences.P_DISPLAY_PAGE_SIZE));
 475         h.setHint(Hints.KEY_DISPLAY_MARGINS, diagramPreferences.get(DiagramPreferences.P_DISPLAY_MARGINS));
 476         ctx.add(new PageBorderParticipant());
 477
 478         // h.setHint(Hints.KEY_GRID_COLOR, new Color(0.9f, 0.9f, 0.9f));
 479         // h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.LIGHT_GRAY);
 480         h.setHint(Hints.KEY_GRID_COLOR, new Color(0.95f, 0.95f, 0.95f));
 481         h.setHint(Hints.KEY_BACKGROUND_COLOR, Color.WHITE);
 482         h.setHint(RulerPainter.KEY_RULER_BACKGROUND_COLOR, new Color(0.9f, 0.9f, 0.9f, 0.75f));
 483         h.setHint(RulerPainter.KEY_RULER_TEXT_COLOR, Color.BLACK);
 484
 485         ////// Diagram Participants //////
 486         ctx.add(new ZOrderHandler());
 487         ctx.add(new PointerInteractor(true, true, true, false, true, false, synchronizer.getElementClassProvider(), null));
 488         ctx.add(new ElementInteractor());
 489         ctx.add(new Selection());
 490         ctx.add(new DiagramParticipant());
 491         ctx.add(new ElementPainter());
 492         ctx.add(new TerminalPainter(true, true, false, true));
 493         //ctx.add(new ElementHeartbeater());
 494 //        ctx.add(new ZoomTransitionParticipant(TransitionFunction.SIGMOID));
 495
 496         /////// D'n'D ///////
 497         addDropParticipants(ctx);
 498
 499         h.setHint(ElementPainter.KEY_SELECTION_FRAME_COLOR, Color.MAGENTA);
 500         h.setHint(Hints.KEY_TOOL, Hints.POINTERTOOL);
 501
 502         h.setHint(PanZoomRotateHandler.KEY_ZOOM_IN_LIMIT, 100000.0);
 503         h.setHint(PanZoomRotateHandler.KEY_ZOOM_OUT_LIMIT, 10.0);
 504
 505         Double snapResolution = diagramPreferences.get(DiagramPreferences.P_SNAP_GRID_SIZE);
 506         this.snapAdvisor = new GridSnapAdvisor(snapResolution);
 507         h.setHint(DiagramHints.SNAP_ADVISOR, this.snapAdvisor);
 508
 509         // Workbench selection provider
 510         addStructureParticipants(ctx);
 511
 512         // Pop-up menu
 513         addPopupmenu(ctx);
 514
 515         // Load page frame description settings
 516         loadPageSettings(ctx);
 517
 518         // The canvas context should not be painted until it is ready to avoid
 519         // unnecessary visual glitches.
 520         h.setHint(Hints.KEY_DISABLE_PAINTING, Boolean.TRUE);
 521
 522         ctx.assertParticipantDependencies();
 523
 524         return ctx;
 525     }
 526
 527     protected void loadPageSettings(ICanvasContext ctx) {
 528         PageDesc pageDesc = null;
 529
 530         if (diagramResource != null) {
 531             try {
 532                 pageDesc = sessionContext.getSession().syncRequest(new Read<PageDesc>() {
 533                     @Override
 534                     public PageDesc perform(ReadGraph graph) throws DatabaseException {
 535                         return DiagramGraphUtil.getPageDesc(graph, diagramResource, null);
 536                     }
 537                 });
 538             } catch (DatabaseException e) {
 539                 ErrorLogger.defaultLogError(e);
 540             }
 541         }
 542
 543         if (pageDesc == null) {
 544             // Take page description from the preferences if nothing else is available.
 545             PageDesc pd = diagramPreferences.getCompletePageDesc();
 546             pageDesc = pd;
 547         }
 548         ctx.getDefaultHintContext().setHint(Hints.KEY_PAGE_DESC, pageDesc);
 549     }
 550
 551     private boolean firstFocus = true;
 552
 553     @Override
 554     public void setFocus() {
 555         c.setFocus();
 556
 557         if (firstFocus) {
 558             // This is a workaround for using the symbol viewer in multi-page
 559             // editors which causes the first zoom-to-fit scheduling to happen
 560             // already before the controls have been laid out properly.
 561             firstFocus = false;
 562             firstTimeSetFocus();
 563         }
 564     }
 565
 566     protected void firstTimeSetFocus() {
 567         //scheduleZoomToFit();
 568     }
 569
 570     @Override
 571     public void dispose() {
 572         // Remember to remove the added preference change listener
 573         diagramPreferences.preferences.removePreferenceChangeListener(preferenceListener);
 574
 575         // Deactivate all contexts here because after this the context service
 576         // in question will not be available.
 577         contextUtil.deactivateAll();
 578
 579         disposed = true;
 580         if (activation != null) {
 581             activation.deactivate();
 582             activation = null;
 583         }
 584         synchronizer.dispose();
 585         ThreadUtils.asyncExec(c.getCanvasContext().getThreadAccess(), new Runnable() {
 586             @Override
 587             public void run() {
 588                 c.getCanvasContext().dispose();
 589             }
 590         });
 591         sourceDiagram.dispose();
 592         support.dispose();
 593         super.dispose();
 594     }
 595
 596     protected Resource getInputResource() {
 597         return getResourceInput().getResource();
 598     }
 599
 600     @Override
 601     public IResourceEditorInput2 getResourceInput2() {
 602         return (IResourceEditorInput2) getEditorInput();
 603     }
 604
 605     @Override
 606     public IResourceEditorInput getResourceInput() {
 607         return (IResourceEditorInput) getEditorInput();
 608     }
 609
 610     @Override
 611     public void doSave(IProgressMonitor monitor) {
 612     }
 613
 614     @Override
 615     public void doSaveAs() {
 616     }
 617
 618     @Override
 619     public void init(IEditorSite site, IEditorInput input) throws PartInitException {
 620         if (!(input instanceof IResourceEditorInput))
 621             throw new PartInitException("Invalid input: must be IResourceEditorInput");
 622         setSite(site);
 623         setInput(input);
 624         support = new ResourceEditorSupport(this);
 625
 626         // Set initial part name according to the name given by IEditorInput
 627         setPartName(getEditorInput().getName());
 628
 629         Session session = SimanticsUI.peekSession();
 630         if (session != null) {
 631             Supplier<Boolean> disposedCallback = () -> disposed;
 632             session.asyncRequest(
 633                     new TitleRequest(site.getId(), getResourceInput2()),
 634                     new TitleUpdater(site.getShell().getDisplay(), this::setPartName, disposedCallback));
 635             session.asyncRequest(
 636                     new ToolTipRequest(site.getId(), getResourceInput2()),
 637                     new TitleUpdater(site.getShell().getDisplay(), this::setTitleToolTip, disposedCallback));
 638         }
 639
 640     }
 641
 642     @Override
 643     public boolean isDirty() {
 644         return false;
 645     }
 646
 647     @Override
 648     public boolean isSaveAsAllowed() {
 649         return false;
 650     }
 651
 652     @SuppressWarnings("unchecked")
 653     @Override
 654     public <T> T getAdapter(Class<T> adapter) {
 655         if (adapter == IPropertyPage.class)
 656             return (T) new StandardPropertyPage(getSite());
 657         if (adapter == IContentOutlinePage.class)
 658             return (T) new DiagramOutlinePage(sessionContextProvider, getResourceInput2());
 659         if (adapter == ILayersViewPage.class)
 660             return (T) new DiagramLayersPage(sourceDiagram, canvasContext);
 661         if (adapter == ICanvasContext.class)
 662             return (T) canvasContext;
 663         if (adapter == INode.class) {
 664             if (canvasContext != null) {
 665                 INode node = canvasContext.getCanvasNode();
 666                 if (node != null)
 667                     return (T) NodeUtil.getRootNode(node);
 668             }
 669             return null;
 670         }
 671         if (adapter == IDiagram.class)
 672             return (T) sourceDiagram;
 673         if (adapter == Session.class)
 674             return (T) sessionContext.getSession();
 675         return super.getAdapter(adapter);
 676     }
 677
 678     protected void onCreated() {
 679     }
 680
 681
 682     private static Object BEGIN(String name) {
 683         if (PROFILE) {
 684             //return ThreadLog.BEGIN(name);
 685         }
 686         return null;
 687     }
 688
 689     private static void END(Object task) {
 690         if (PROFILE) {
 691             //((Task) task).end();
 692         }
 693     }
 694
 695 }