bundles/org.simantics.debug.ui/src/org/simantics/debug/ui/GraphDebugger.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.debug.ui;
  13
  14 import java.io.File;
  15 import java.io.FileNotFoundException;
  16 import java.io.IOException;
  17 import java.lang.reflect.Array;
  18 import java.net.URI;
  19 import java.net.URISyntaxException;
  20 import java.net.URL;
  21 import java.util.ArrayList;
  22 import java.util.Arrays;
  23 import java.util.Collection;
  24 import java.util.Comparator;
  25 import java.util.HashMap;
  26 import java.util.LinkedList;
  27 import java.util.List;
  28 import java.util.Map;
  29 import java.util.UUID;
  30 import java.util.concurrent.CopyOnWriteArrayList;
  31
  32 import org.eclipse.core.runtime.Assert;
  33 import org.eclipse.core.runtime.FileLocator;
  34 import org.eclipse.core.runtime.IPath;
  35 import org.eclipse.core.runtime.Path;
  36 import org.eclipse.jface.action.IStatusLineManager;
  37 import org.eclipse.jface.dialogs.Dialog;
  38 import org.eclipse.jface.dialogs.IDialogConstants;
  39 import org.eclipse.jface.dialogs.IDialogSettings;
  40 import org.eclipse.jface.dialogs.IInputValidator;
  41 import org.eclipse.jface.dialogs.InputDialog;
  42 import org.eclipse.jface.dialogs.MessageDialog;
  43 import org.eclipse.jface.layout.GridDataFactory;
  44 import org.eclipse.jface.resource.ColorDescriptor;
  45 import org.eclipse.jface.resource.JFaceResources;
  46 import org.eclipse.jface.resource.LocalResourceManager;
  47 import org.eclipse.swt.SWT;
  48 import org.eclipse.swt.SWTError;
  49 import org.eclipse.swt.browser.Browser;
  50 import org.eclipse.swt.browser.LocationAdapter;
  51 import org.eclipse.swt.browser.LocationEvent;
  52 import org.eclipse.swt.dnd.DND;
  53 import org.eclipse.swt.dnd.DropTarget;
  54 import org.eclipse.swt.dnd.DropTargetAdapter;
  55 import org.eclipse.swt.dnd.DropTargetEvent;
  56 import org.eclipse.swt.dnd.TextTransfer;
  57 import org.eclipse.swt.dnd.Transfer;
  58 import org.eclipse.swt.events.DisposeEvent;
  59 import org.eclipse.swt.events.DisposeListener;
  60 import org.eclipse.swt.events.FocusEvent;
  61 import org.eclipse.swt.events.FocusListener;
  62 import org.eclipse.swt.events.KeyAdapter;
  63 import org.eclipse.swt.events.KeyEvent;
  64 import org.eclipse.swt.events.ModifyEvent;
  65 import org.eclipse.swt.events.ModifyListener;
  66 import org.eclipse.swt.events.SelectionEvent;
  67 import org.eclipse.swt.events.SelectionListener;
  68 import org.eclipse.swt.graphics.Color;
  69 import org.eclipse.swt.graphics.Point;
  70 import org.eclipse.swt.graphics.RGB;
  71 import org.eclipse.swt.layout.GridData;
  72 import org.eclipse.swt.layout.GridLayout;
  73 import org.eclipse.swt.widgets.Button;
  74 import org.eclipse.swt.widgets.Composite;
  75 import org.eclipse.swt.widgets.Label;
  76 import org.eclipse.swt.widgets.Text;
  77 import org.eclipse.ui.IWorkbenchSite;
  78 import org.simantics.databoard.Bindings;
  79 import org.simantics.databoard.Databoard;
  80 import org.simantics.databoard.binding.Binding;
  81 import org.simantics.databoard.binding.error.BindingException;
  82 import org.simantics.databoard.serialization.Serializer;
  83 import org.simantics.databoard.type.ArrayType;
  84 import org.simantics.databoard.type.Datatype;
  85 import org.simantics.databoard.type.StringType;
  86 import org.simantics.databoard.util.ObjectUtils;
  87 import org.simantics.db.AsyncRequestProcessor;
  88 import org.simantics.db.ReadGraph;
  89 import org.simantics.db.Resource;
  90 import org.simantics.db.Session;
  91 import org.simantics.db.Statement;
  92 import org.simantics.db.VirtualGraph;
  93 import org.simantics.db.WriteGraph;
  94 import org.simantics.db.common.ResourceArray;
  95 import org.simantics.db.common.procedure.adapter.ProcedureAdapter;
  96 import org.simantics.db.common.request.Queries;
  97 import org.simantics.db.common.request.ReadRequest;
  98 import org.simantics.db.common.request.WriteRequest;
  99 import org.simantics.db.common.uri.ResourceToPossibleURI;
 100 import org.simantics.db.common.utils.ListUtils;
 101 import org.simantics.db.common.utils.NameUtils;
 102 import org.simantics.db.common.utils.OrderedSetUtils;
 103 import org.simantics.db.event.ChangeEvent;
 104 import org.simantics.db.event.ChangeListener;
 105 import org.simantics.db.exception.AdaptionException;
 106 import org.simantics.db.exception.DatabaseException;
 107 import org.simantics.db.exception.ResourceNotFoundException;
 108 import org.simantics.db.exception.ValidationException;
 109 import org.simantics.db.layer0.adapter.StringModifier;
 110 import org.simantics.db.layer0.variable.RVI;
 111 import org.simantics.db.layer0.variable.Variable;
 112 import org.simantics.db.layer0.variable.Variables;
 113 import org.simantics.db.service.ClusteringSupport;
 114 import org.simantics.db.service.GraphChangeListenerSupport;
 115 import org.simantics.db.service.SerialisationSupport;
 116 import org.simantics.db.service.VirtualGraphSupport;
 117 import org.simantics.db.service.XSupport;
 118 import org.simantics.debug.ui.internal.Activator;
 119 import org.simantics.debug.ui.internal.DebugUtils;
 120 import org.simantics.debug.ui.internal.HashMultiMap;
 121 import org.simantics.layer0.Layer0;
 122 import org.simantics.ui.dnd.LocalObjectTransfer;
 123 import org.simantics.ui.dnd.ResourceReferenceTransfer;
 124 import org.simantics.ui.dnd.ResourceTransferUtils;
 125 import org.simantics.ui.utils.ResourceAdaptionUtils;
 126 import org.simantics.utils.Container;
 127 import org.simantics.utils.FileUtils;
 128 import org.simantics.utils.datastructures.BijectionMap;
 129 import org.simantics.utils.datastructures.Callback;
 130 import org.simantics.utils.strings.AlphanumComparator;
 131 import org.simantics.utils.ui.ErrorLogger;
 132 import org.simantics.utils.ui.PathUtils;
 133 import org.simantics.utils.ui.workbench.WorkbenchUtils;
 134
 135
 136 public class GraphDebugger extends Composite {
 137
 138     public interface HistoryListener {
 139         void historyChanged();
 140     }
 141
 142     private static final String                         STATEMENT_PART_SEPARATOR  = ",";
 143     private final static String                         DEFAULT_DEBUGGER_CSS_FILE = "debugger.css";
 144     private final static String                         DEFAULT_DEBUGGER_CSS_PATH = "css/" + DEFAULT_DEBUGGER_CSS_FILE;
 145
 146     private static int                                  RESOURCE_NAME_MAX_LENGTH  = 1000;
 147     private static int                                  RESOURCE_VALUE_MAX_SIZE = 16384;
 148
 149     private final LocalResourceManager                  resourceManager;
 150
 151     private String                                      cssPath;
 152
 153     private Browser                                     browser;
 154     private final ColorDescriptor                       green = ColorDescriptor.createFrom(new RGB(0x57, 0xbc, 0x95));
 155
 156     private final boolean                               displayClusters           = true;
 157
 158     private final BijectionMap<String, Resource>        links                     = new BijectionMap<String, Resource>();
 159     private final LinkedList<Resource>                  backHistory               = new LinkedList<Resource>();
 160     private final LinkedList<Resource>                  forwardHistory            = new LinkedList<Resource>();
 161     private Resource                                    currentElement            = null;
 162
 163     /**
 164      * The Session used to access the graph. Received from outside of this
 165      * class and therefore it is not disposed here, just used.
 166      */
 167     private final Session                               session;
 168
 169     private final CopyOnWriteArrayList<HistoryListener> historyListeners          = new CopyOnWriteArrayList<HistoryListener>();
 170
 171     private final AsyncRequestProcessor                 updater;
 172
 173     protected Layer0                                    L0;
 174
 175     protected IWorkbenchSite                            site;
 176
 177     private final ChangeListener changeListener = new ChangeListener() {
 178         @Override
 179         public void graphChanged(ChangeEvent e) {
 180             // This makes sure that the transaction for updating this
 181             // GraphDebugger get executed in a serialized fashion.
 182             updater.asyncRequest(new ReadRequest() {
 183
 184                 @Override
 185                 public void run(ReadGraph graph) throws DatabaseException {
 186                     updateContent(graph, currentElement);
 187                 }
 188
 189             });
 190
 191         }
 192     };
 193
 194     /**
 195      * @param parent
 196      * @param style
 197      * @param session
 198      * @param resource the initial resource to debug or <code>null</code> for
 199      *        initially blank UI.
 200      * @param site the workbench site that contains this debugger, for workbench
 201      *        service access
 202      */
 203     public GraphDebugger(Composite parent, int style, final Session session, Resource resource, IWorkbenchSite site) {
 204         this(parent, style, session, resource);
 205         this.site = site;
 206     }
 207
 208     /**
 209      * @param parent
 210      * @param style
 211      * @param session
 212      * @param resource the initial resource to debug or <code>null</code> for
 213      *        initially blank UI.
 214      */
 215     public GraphDebugger(Composite parent, int style, final Session session, Resource resource) {
 216         super(parent, style);
 217         Assert.isNotNull(session, "session is null");
 218         this.session = session;
 219         this.currentElement = resource;
 220         this.resourceManager = new LocalResourceManager(JFaceResources.getResources(), parent);
 221
 222         updater = session;//.getService(MergingGraphRequestProcessor.class);
 223
 224         initializeCSS();
 225
 226         addDisposeListener(new DisposeListener() {
 227             @Override
 228             public void widgetDisposed(DisposeEvent e) {
 229                 GraphChangeListenerSupport support = session.getService(GraphChangeListenerSupport.class);
 230                 support.removeListener(changeListener);
 231             }
 232         });
 233     }
 234
 235     /**
 236      * When given to setStatus, indicates that the message shouldn't be touched
 237      * since <code>null</code> has a different meaning.
 238      */
 239     private static final String DONT_TOUCH = "DONT_TOUCH";
 240
 241     protected void setStatus(String message, String error) {
 242         IStatusLineManager status = WorkbenchUtils.getStatusLine(site);
 243         if (status != null) {
 244             if (message != DONT_TOUCH)
 245                 status.setMessage(message);
 246             if (error != DONT_TOUCH)
 247                 status.setErrorMessage(error);
 248         }
 249     }
 250
 251     public void defaultInitializeUI() {
 252         setLayout(new GridLayout(2, false));
 253         setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
 254
 255         createResourceText(this);
 256         createDropLabel(this);
 257         createBrowser(this);
 258
 259     }
 260
 261     protected void initializeCSS() {
 262         // Extract default css to a temporary location if necessary.
 263         try {
 264             IPath absolutePath = PathUtils.getAbsolutePath(Activator.PLUGIN_ID, DEFAULT_DEBUGGER_CSS_PATH);
 265             if (absolutePath != null) {
 266                 cssPath = absolutePath.toFile().toURI().toString();
 267             } else {
 268                 File tempDir = FileUtils.getOrCreateTemporaryDirectory(false);
 269                 File css = new File(tempDir, DEFAULT_DEBUGGER_CSS_FILE);
 270                 if (!css.exists()) {
 271                     URL url = FileLocator.find(Activator.getDefault().getBundle(), new Path(DEFAULT_DEBUGGER_CSS_PATH), null);
 272                     if (url == null)
 273                         throw new FileNotFoundException("Could not find '" + DEFAULT_DEBUGGER_CSS_PATH + "' in bundle '" + Activator.PLUGIN_ID + "'");
 274                     cssPath = FileUtils.copyResource(url, css, true).toURI().toString();
 275                 } else {
 276                     cssPath = css.toURI().toString();
 277                 }
 278             }
 279         } catch (IOException e) {
 280             // CSS extraction failed, let's just live without it then.
 281             ErrorLogger.defaultLogWarning(e);
 282         }
 283     }
 284
 285     private static final String PROMPT_TEXT = "Enter resource ID (RID) or URI";
 286
 287     public void createResourceText(final Composite parent) {
 288         final Text text = new Text(parent, SWT.BORDER);
 289         text.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_DARK_GRAY));
 290         text.setText(PROMPT_TEXT);
 291         GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(true, false).applyTo(text);
 292
 293         text.addFocusListener(new FocusListener() {
 294             @Override
 295             public void focusLost(FocusEvent e) {
 296                 if (text.getText().trim().equals("")) {
 297                     text.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_DARK_GRAY));
 298                     text.setText(PROMPT_TEXT);
 299                 }
 300             }
 301             @Override
 302             public void focusGained(FocusEvent e) {
 303                 if (text.getText().trim().equals(PROMPT_TEXT)) {
 304                     text.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_BLACK));
 305                     text.setText("");
 306                 }
 307                 text.selectAll();
 308             }
 309         });
 310         text.addKeyListener(new KeyAdapter() {
 311             @Override
 312             public void keyPressed(KeyEvent e) {
 313                 if (e.keyCode == SWT.CR) {
 314                     String input = text.getText();
 315                     setLookupInput(input);
 316                 }
 317             }
 318         });
 319
 320         final Button button = new Button(parent, SWT.FLAT);
 321         button.setText("&Lookup");
 322         button.setEnabled(false);
 323         GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).grab(false, false).applyTo(button);
 324
 325         text.addKeyListener(new KeyAdapter() {
 326
 327             @Override
 328             public void keyPressed(KeyEvent e) {
 329                 if (e.keyCode == 13) {
 330                     String input = text.getText();
 331                     setLookupInput(input);
 332                     button.setFocus();
 333                 }
 334             }
 335         });
 336
 337         button.addSelectionListener(new SelectionListener() {
 338             @Override
 339             public void widgetDefaultSelected(SelectionEvent e) {
 340                 widgetSelected(e);
 341             }
 342             @Override
 343             public void widgetSelected(SelectionEvent e) {
 344                 String input = text.getText();
 345                 setLookupInput(input);
 346             }
 347         });
 348
 349         text.addModifyListener(new ModifyListener() {
 350             @Override
 351             public void modifyText(ModifyEvent e) {
 352                 String input = text.getText().trim();
 353                 if (!input.equals(PROMPT_TEXT) && !input.equals(""))
 354                     button.setEnabled(true);
 355                 else
 356                     button.setEnabled(false);
 357             }
 358         });
 359     }
 360
 361     public void setLookupInput(String input) {
 362         // There's no harm in trimming out spaces from both ends of the input.
 363         input = input.trim();
 364
 365         SerialisationSupport support = session.getService(SerialisationSupport.class);
 366         if (input.startsWith("$")) {
 367             try {
 368                 Resource r = support.getResource(Long.parseLong(input.substring(1)));
 369                 changeLocation(r);
 370             } catch (NumberFormatException e1) {
 371                 // Ignore, may happen for crap input
 372                 setStatus(DONT_TOUCH, "Invalid '$'-prefixed input, expected resource ID");
 373             } catch (Exception e1) {
 374                 ErrorLogger.defaultLogError(e1);
 375                 setStatus(DONT_TOUCH, "Resource ID lookup failed. See Error Log.");
 376             }
 377             return;
 378         }
 379
 380         String[] parts = input.split("-");
 381
 382         if (parts.length == 1) {
 383             try {
 384                 int resourceKey = Integer.parseInt(parts[0].trim());
 385                 Resource r = support.getResource(resourceKey);
 386                 // Some validation, not enough though
 387                 ClusteringSupport cs = session.getService(ClusteringSupport.class);
 388                 long cluster = cs.getCluster(r);
 389                 if(cluster > 0) {
 390                     changeLocation(r);
 391                 }
 392             } catch (NumberFormatException e1) {
 393                 // Ignore, may happen for crap input
 394                 setStatus(DONT_TOUCH, "Invalid input, expected transient resource ID");
 395             } catch (Exception e1) {
 396                 ErrorLogger.defaultLogError(e1);
 397                 setStatus(DONT_TOUCH, "Transient resource ID lookup failed. See Error Log.");
 398             }
 399         } else if (parts.length == 2) {
 400             try {
 401                 int resourceIndex = Integer.parseInt(parts[1]);
 402                 long clusterId = Long.parseLong(parts[0]);
 403                 ClusteringSupport cs = session.getService(ClusteringSupport.class);
 404                 Resource r = cs.getResourceByIndexAndCluster(resourceIndex, clusterId);
 405                 changeLocation(r);
 406             } catch (NumberFormatException e1) {
 407                 // Ignore, may happen for crap input
 408                 setStatus(DONT_TOUCH, "Invalid input, expected index & cluster IDs");
 409             } catch (Exception e1) {
 410                 ErrorLogger.defaultLogError(e1);
 411                 setStatus(DONT_TOUCH, "Index & cluster -based lookup failed. See Error Log.");
 412             }
 413         }
 414
 415         // Try to see if the input data is an URI reference
 416         try {
 417             // First check that the input really is a proper URI.
 418             String uri = input;
 419             if (!input.equals("http:/") && input.endsWith("/"))
 420                 uri = input.substring(0, input.length() - 1);
 421             new URI(uri);
 422             Resource r = session.syncRequest( Queries.resource( uri ) );
 423             changeLocation(r);
 424             return;
 425         } catch (URISyntaxException e) {
 426             // Ignore, this is not a proper URI at all.
 427         } catch (ResourceNotFoundException e1) {
 428             // Ok, this was an URI, but no resource was found.
 429             setStatus(DONT_TOUCH, "Resource for URI '" + input + "' not found");
 430             return;
 431         } catch (DatabaseException e1) {
 432             setStatus(DONT_TOUCH, "URI lookup failed. See Error Log.");
 433             ErrorLogger.defaultLogError(e1);
 434         }
 435
 436         setStatus(DONT_TOUCH, "Invalid input, resource ID or URI expected");
 437     }
 438
 439     public Label createDropLabel(Composite parent) {
 440         final Label label = new Label(parent, SWT.BORDER);
 441         label.setAlignment(SWT.CENTER);
 442         label.setText("Drag a resource here to examine it in this debugger!");
 443         label.setForeground(parent.getDisplay().getSystemColor(SWT.COLOR_DARK_GRAY));
 444         GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).hint(SWT.DEFAULT, 20).span(2, 1).grab(true, false).applyTo(label);
 445
 446         // Add resource id drop support to the drop-area.
 447         DropTarget dropTarget = new DropTarget(label, DND.DROP_LINK | DND.DROP_COPY);
 448         dropTarget.setTransfer(new Transfer[] { TextTransfer.getInstance(), ResourceReferenceTransfer.getInstance(), LocalObjectTransfer.getTransfer() });
 449         dropTarget.addDropListener(new DropTargetAdapter() {
 450             @Override
 451             public void dragEnter(DropTargetEvent event) {
 452                 event.detail = DND.DROP_LINK;
 453                 label.setBackground((Color) resourceManager.get(green));
 454                 return;
 455             }
 456             @Override
 457             public void dragLeave(DropTargetEvent event) {
 458                 label.setBackground(null);
 459             }
 460
 461             @Override
 462             public void drop(DropTargetEvent event) {
 463                 label.setBackground(null);
 464                 ResourceArray[] data = parseEventData(event);
 465                 if (data == null || data.length != 1) {
 466                     event.detail = DND.DROP_NONE;
 467                     return;
 468                 }
 469                 final ResourceArray array = data[0];
 470                 final Resource r = array.resources[array.resources.length - 1];
 471
 472                 changeLocation(r);
 473             }
 474
 475             private ResourceArray[] parseEventData(DropTargetEvent event) {
 476                 //System.out.println("DATA: " + event.data);
 477                 if (event.data instanceof String) {
 478                     try {
 479                         SerialisationSupport support = session.getService(SerialisationSupport.class);
 480                         return ResourceTransferUtils.readStringTransferable(support, (String) event.data).toResourceArrayArray();
 481                     } catch (IllegalArgumentException e) {
 482                         ErrorLogger.defaultLogError(e);
 483                     } catch (DatabaseException e) {
 484                         ErrorLogger.defaultLogError(e);
 485                     }
 486                 }
 487                 ResourceArray[] ret = ResourceAdaptionUtils.toResourceArrays(event.data);
 488                 if (ret.length > 0)
 489                     return ret;
 490                 return null;
 491             }
 492         });
 493
 494         return label;
 495     }
 496
 497     public Browser createBrowser(Composite parent) {
 498         try {
 499             browser = new Browser(parent, SWT.MOZILLA);
 500         } catch (SWTError e) {
 501             //System.out.println("Could not instantiate Browser: " + e.getMessage());
 502             browser = new Browser(parent, SWT.NONE);
 503         }
 504         GridDataFactory.fillDefaults().span(2, 1).grab(true, true).applyTo(browser);
 505
 506         // Left/right arrows for back/forward
 507         browser.addKeyListener(new KeyAdapter() {
 508 //
 509 //              @Override
 510 //            public void keyPressed(KeyEvent e) {
 511 //                      if (e.keyCode == SWT.F5) {
 512 //                      refreshBrowser();
 513 //                      }
 514 //              }
 515 //          }
 516             @Override
 517             public void keyReleased(KeyEvent e) {
 518 //                System.out.println("key, char: " + e.keyCode + ", " + (int) e.character + " (" + e.character + ")");
 519                 if (e.keyCode == SWT.BS) {
 520                     back();
 521                 }
 522
 523                 if (e.keyCode == SWT.F5) {
 524                         refreshBrowser();
 525                 }
 526
 527                 if ((e.stateMask & SWT.ALT) != 0) {
 528                     if (e.keyCode == SWT.ARROW_RIGHT)
 529                         forward();
 530                     if (e.keyCode == SWT.ARROW_LEFT)
 531                         back();
 532                 }
 533             }
 534         });
 535
 536         // Add listener for debugging functionality
 537         browser.addLocationListener(new LocationAdapter() {
 538             @Override
 539             public void changing(LocationEvent event) {
 540                 String location = event.location;
 541                 if (location.startsWith("simantics:browser"))
 542                     location = "about:" + location.substring(17);
 543                 //System.out.println("changing: location=" + location);
 544
 545                 // Do not follow links that are meant as actions that are
 546                 // handled below.
 547                 event.doit = false;
 548                 if ("about:blank".equals(location)) {
 549                     // Just changing to the same old blank url is ok since it
 550                     // allows the browser to refresh itself.
 551                     event.doit = true;
 552                 }
 553
 554                 if (location.startsWith("about:-link")) {
 555                     String target = location.replace("about:-link", "");
 556                     Resource element = links.getRight(target);
 557                     if (element == currentElement) {
 558                         event.doit = false;
 559                         return;
 560                     }
 561                     changeLocation(element);
 562                 } else if (location.startsWith("about:-remove")) {
 563                     String target = location.replace("about:-remove", "");
 564                     String n[] = target.split(STATEMENT_PART_SEPARATOR);
 565                     if (n.length != 3)
 566                         return;
 567
 568                     final Resource s = links.getRight(n[0]);
 569                     final Resource p = links.getRight(n[1]);
 570                     final Resource o = links.getRight(n[2]);
 571
 572                     // Make sure this is what the use wants.
 573                     MessageDialog md = new MessageDialog(
 574                             getShell(),
 575                             "Confirm action...",
 576                             null,
 577                             "This action will remove the selected statement.\nAre you sure you want to proceed with this action?",
 578                             MessageDialog.QUESTION, new String[] { "Cancel", "Continue" }, 0);
 579                     if (md.open() != 1) {
 580                         return;
 581                     }
 582
 583                     session.asyncRequest(new WriteRequest() {
 584
 585                         @Override
 586                         public void perform(WriteGraph g) throws DatabaseException {
 587                                 try {
 588                                         List<Resource> ls = OrderedSetUtils.toList(g, s);
 589                                         if(ls.contains(o))
 590                                                 OrderedSetUtils.remove(g, s, o);
 591                                 } catch (DatabaseException e) {
 592
 593                                 }
 594                                 try {
 595                                         List<Resource> ls = ListUtils.toList(g, s);
 596                                         if(ls.contains(o))
 597                                                 ListUtils.removeElement(g, s, o);
 598                                 } catch (DatabaseException e) {
 599
 600                                 }
 601                             g.denyStatement(s, p, o);
 602                         }
 603
 604                     }, new Callback<DatabaseException>() {
 605
 606                         @Override
 607                         public void run(DatabaseException parameter) {
 608                             refreshBrowser();
 609                         }
 610
 611                     });
 612                 } else if (location.startsWith("about:-edit-value")) {
 613                     String target = location.replace("about:-edit-value", "");
 614                     final Resource o = links.getRight(target);
 615
 616                     session.asyncRequest(new ReadRequest() {
 617
 618                         String previousValue;
 619
 620                         @Override
 621                         public void run(ReadGraph graph) throws DatabaseException {
 622
 623                             previousValue = getResourceName(graph, o);
 624                             final StringModifier modifier = graph.adapt(o, StringModifier.class);
 625                             getDisplay().asyncExec(new Runnable() {
 626                                 @Override
 627                                 public void run() {
 628                                     InputDialog dialog = new InputDialog(
 629                                             getShell(),
 630                                             "Edit Value",
 631                                             null,
 632                                             previousValue,
 633                                             new IInputValidator() {
 634                                                 @Override
 635                                                 public String isValid(String newText) {
 636                                                     return modifier.isValid(newText);
 637                                                 }
 638                                             }) {
 639                                         private static final String DIALOG = "DebuggerEditValueDialog"; //$NON-NLS-1$
 640                                         private IDialogSettings dialogBoundsSettings;
 641                                         @Override
 642                                         protected IDialogSettings getDialogBoundsSettings() {
 643                                             if (dialogBoundsSettings == null) {
 644                                                 IDialogSettings settings = Activator.getDefault().getDialogSettings();
 645                                                 dialogBoundsSettings = settings.getSection(DIALOG);
 646                                                 if (dialogBoundsSettings == null)
 647                                                     dialogBoundsSettings = settings.addNewSection(DIALOG);
 648                                             }
 649                                             return dialogBoundsSettings;
 650                                         }
 651                                         @Override
 652                                         protected Point getInitialSize() {
 653                                             Point defaultSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
 654                                             Point result = super.getInitialSize();
 655                                             if (defaultSize.equals(result))
 656                                                 return new Point(600, 400);
 657                                             return result;
 658                                         }
 659                                         protected int getShellStyle() {
 660                                             return super.getShellStyle() | SWT.RESIZE;
 661                                         }
 662                                         protected org.eclipse.swt.widgets.Control createDialogArea(Composite parent) {
 663                                             Composite composite = (Composite) super.createDialogArea(parent);
 664                                             getText().setLayoutData(
 665                                                     new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL
 666                                                             | GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL));
 667                                             {
 668                                                 Label label = new Label(composite, SWT.NONE);
 669                                                 label.moveAbove(getText());
 670                                                 label.setText("Input new property value. For numeric vector values, separate numbers with comma (',').");
 671                                                 GridData data = new GridData(GridData.GRAB_HORIZONTAL
 672                                                         | GridData.HORIZONTAL_ALIGN_FILL
 673                                                         | GridData.VERTICAL_ALIGN_CENTER);
 674                                                 data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH);
 675                                                 label.setLayoutData(data);
 676                                                 label.setFont(parent.getFont());
 677                                             }
 678                                             return composite;
 679                                         }
 680                                         protected int getInputTextStyle() {
 681                                             return SWT.MULTI | SWT.BORDER;
 682                                         }
 683                                     };
 684                                     int ok = dialog.open();
 685                                     if (ok != Dialog.OK)
 686                                         return;
 687
 688                                     final String value = dialog.getValue();
 689                                     session.asyncRequest(new WriteRequest() {
 690                                         @Override
 691                                         public void perform(WriteGraph g) throws DatabaseException {
 692                                             //modifier.modify( g, htmlEscape( value ) );
 693                                             modifier.modify( g, value );
 694                                         }
 695                                     }, new Callback<DatabaseException>() {
 696                                         @Override
 697                                         public void run(DatabaseException parameter) {
 698                                             if (parameter != null)
 699                                                 ErrorLogger.defaultLogError(parameter);
 700                                             refreshBrowser();
 701                                         }
 702                                     });
 703                                     return;
 704                                 }
 705                             });
 706                         }
 707
 708                     }, new ProcedureAdapter<Object>() {
 709                         @Override
 710                         public void exception(Throwable t) {
 711                             ErrorLogger.defaultLogError(t);
 712                         }
 713                     });
 714
 715                 }
 716             }
 717         });
 718
 719         // Schedule a request that updates the browser content.
 720         refreshBrowser();
 721         GraphChangeListenerSupport support = session.getService(GraphChangeListenerSupport.class);
 722         support.removeListener(changeListener);
 723
 724         return browser;
 725     }
 726
 727     public void refreshBrowser() {
 728         if (currentElement == null)
 729             return;
 730
 731         // Schedule a request that updates the browser content.
 732         updater.asyncRequest(new ReadRequest() {
 733
 734             @Override
 735             public void run(ReadGraph graph) throws DatabaseException {
 736                 updateContent(graph, currentElement);
 737             }
 738
 739         });
 740
 741     }
 742
 743     public Resource getDebuggerLocation() {
 744         return currentElement;
 745     }
 746
 747     public void changeLocation(Resource element) {
 748         if (currentElement != null) {
 749             backHistory.addLast(currentElement);
 750         }
 751         currentElement = element;
 752         forwardHistory.clear();
 753
 754         refreshBrowser();
 755         setStatus(DONT_TOUCH, null);
 756         fireHistoryChanged();
 757     }
 758
 759     public void addHistoryListener(HistoryListener l) {
 760         historyListeners.add(l);
 761     }
 762
 763     public void removeHistoryListener(HistoryListener l) {
 764         historyListeners.remove(l);
 765     }
 766
 767     private void fireHistoryChanged() {
 768         for (HistoryListener l : historyListeners)
 769             l.historyChanged();
 770     }
 771
 772     public boolean hasBackHistory() {
 773         return backHistory.isEmpty();
 774     }
 775
 776     public boolean hasForwardHistory() {
 777         return forwardHistory.isEmpty();
 778     }
 779
 780     public void back() {
 781         if (backHistory.isEmpty())
 782             return;
 783
 784         forwardHistory.addFirst(currentElement);
 785         currentElement = backHistory.removeLast();
 786
 787         refreshBrowser();
 788         fireHistoryChanged();
 789     }
 790
 791     public void forward() {
 792         if (forwardHistory.isEmpty())
 793             return;
 794
 795         backHistory.addLast(currentElement);
 796         currentElement = forwardHistory.removeFirst();
 797
 798         refreshBrowser();
 799         fireHistoryChanged();
 800     }
 801
 802     protected String toName(Object o) {
 803         Class<?> clazz = o.getClass();
 804         if (clazz.isArray()) {
 805             int length = Array.getLength(o);
 806             if (length > RESOURCE_NAME_MAX_LENGTH) {
 807                 if (o instanceof byte[]) {
 808                     byte[] arr = (byte[]) o;
 809                     byte[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 810                     return truncated("byte", Arrays.toString(arr2), arr.length);
 811                 } else if (o instanceof int[]) {
 812                     int[] arr = (int[]) o;
 813                     int[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 814                     return truncated("int", Arrays.toString(arr2), arr.length);
 815                 } else if (o instanceof long[]) {
 816                     long[] arr = (long[]) o;
 817                     long[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 818                     return truncated("long", Arrays.toString(arr2), arr.length);
 819                 } else if (o instanceof float[]) {
 820                     float[] arr = (float[]) o;
 821                     float[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 822                     return truncated("float", Arrays.toString(arr2), arr.length);
 823                 } else if (o instanceof double[]) {
 824                     double[] arr = (double[]) o;
 825                     double[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 826                     return truncated("double", Arrays.toString(arr2), arr.length);
 827                 } else if (o instanceof boolean[]) {
 828                     boolean[] arr = (boolean[]) o;
 829                     boolean[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 830                     return truncated("boolean", Arrays.toString(arr2), arr.length);
 831                 } else if (o instanceof Object[]) {
 832                     Object[] arr = (Object[]) o;
 833                     Object[] arr2 = Arrays.copyOf(arr, RESOURCE_NAME_MAX_LENGTH);
 834                     return truncated("Object", Arrays.toString(arr2), arr.length);
 835                 } else {
 836                     return "Unknown big array " + o.getClass();
 837                 }
 838             } else {
 839                 return o.getClass().getComponentType() + "[" + length + "] = " + ObjectUtils.toString(o);
 840             }
 841         }
 842         return null;
 843     }
 844
 845     protected String truncated(String type, String string, int originalLength) {
 846         return type + "[" + RESOURCE_NAME_MAX_LENGTH + "/" + originalLength + "] = " + string;
 847     }
 848
 849     public static String htmlEscape(String s)
 850     {
 851         return s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;").replace("\n", "<br/>");
 852     }
 853
 854     /**
 855      * Get resource name(?)
 856      *
 857      * @param graph
 858      * @param r
 859      * @return
 860      */
 861     protected String getResourceName(ReadGraph graph, Resource r) {
 862         try {
 863
 864             String name = null;
 865             //System.out.println("hasValue(" + NameUtils.getSafeName(graph, r, true));
 866             if (graph.hasValue(r)) {
 867                 // too large array may cause application to run out of memory.
 868                 //System.out.println("getValue(" + NameUtils.getSafeName(graph, r, true));
 869                 Datatype type = graph.getPossibleRelatedValue(r, L0.HasDataType, Bindings.getBindingUnchecked(Datatype.class));
 870                 if (type!=null) {
 871                         Binding rviBinding = graph.getService(Databoard.class).getBindingUnchecked( RVI.class );
 872                         if (type.equals( rviBinding.type() )) {
 873                                 RVI rvi = graph.getValue(r, rviBinding);
 874
 875                                 try {
 876                                         Variable v = Variables.getConfigurationContext( graph, currentElement );
 877                                         name = rvi.asString(graph, v);
 878 //                                      name = rvi.resolve(graph, v).getURI(graph);
 879                                 } catch (DatabaseException dbe ) {
 880                                         name = rvi.toString( graph );
 881                                 }
 882                         } else {
 883                                 long valueSize = NameUtils.getPossibleValueSize(graph, r);
 884                                 if (valueSize > RESOURCE_NAME_MAX_LENGTH) {
 885 //                                      Binding b = Bindings.getBinding(type);
 886 //                                      Object v = graph.getValue(r, b);
 887 //                                      Serializer s = Bindings.getSerializerUnchecked(b);
 888 //                                      int size = s.getSize(v);
 889                                     name = "Approx. " + valueSize + " byte literal of type " + type.toSingleLineString();
 890                                 } else {
 891                                         Binding b = Bindings.getBinding(type);
 892                                         Object v = graph.getValue(r, b);
 893                                         if (b.type() instanceof StringType) {
 894                                                 name = (String) graph.getValue(r, b);
 895                                         } else {
 896                                             name = b.toString(v, false);
 897                                         }
 898                                     if (type instanceof ArrayType){
 899                                         name = name.substring(1, name.length()-1);
 900                                     }
 901                                 }
 902                         }
 903                 } else {
 904                     Object o = graph.getValue(r);
 905                     name = toName(o);
 906                 }
 907
 908                 if(name.isEmpty()) {
 909                         name = "<empty value>";
 910                 }
 911
 912             }
 913             // Does resource have a file ??
 914             if (name == null) {
 915 //                try {
 916 //                    Accessor accessor = graph.getAccessor(r);
 917 //                    name = "File of type " + accessor.type().toSingleLineString();
 918 //                } catch (DatabaseException e) {
 919 //                    // No file, try next alternative.
 920 //                }
 921             }
 922             if (name == null) {
 923                 //name = graph.adapt(r, String.class);
 924                 //if(name.isEmpty())
 925                 name = DebugUtils.getSafeLabel(graph, r);
 926                 if (name.isEmpty())
 927                     name = "<empty name>";
 928             }
 929 //            ClusteringSupport support = graph.getSession().getService(ClusteringSupport.class);
 930 //            if(name == null)
 931 //                return "[" + r.getResourceId() + " - " + support.getCluster(r) + "]";
 932             if(displayClusters) {
 933 //                SessionDebug debug = graph.getSession().getDebug();
 934 //                name += " (" + debug.getCluster(r) + ")";
 935             }
 936             return name;
 937         } catch (AdaptionException e) {
 938 //            e.printStackTrace();
 939             String name = safeReadableString(graph, r);
 940 //          try {
 941 //                MessageService.defaultLog(new DetailStatus(IDetailStatus.DEBUG, Activator.PLUGIN_ID, 0, NLS.bind(Messages.Name_adaption_problem, MessageUtil.resource(session, r, "this resource")), e));
 942 //            } catch (ReferenceSerializationException e1) {
 943 //                e1.printStackTrace();
 944 //                ErrorLogger.defaultLogWarning(e1);
 945 //            }
 946             return name;
 947         } catch (Exception e) {
 948             ErrorLogger.defaultLogError(e);
 949             String name = safeReadableString(graph, r);
 950 //          try {
 951 //                MessageService.defaultLog(new DetailStatus(IDetailStatus.DEBUG, Activator.PLUGIN_ID, 0, NLS.bind(Messages.Name_formulation_problem, MessageUtil.resource(session, r, "this resource")), e));
 952 //            } catch (ReferenceSerializationException e1) {
 953 //                e1.printStackTrace();
 954 //                ErrorLogger.defaultLogWarning(e1);
 955 //            }
 956             return name;
 957         }
 958     }
 959
 960     private String getResourceRef(ReadGraph graph, Resource r) throws DatabaseException {
 961         String name;
 962         try {
 963             Layer0 L0 = Layer0.getInstance(graph);
 964             if (graph.isInstanceOf(r, L0.Assertion)) {
 965                 Resource pred = graph.getSingleObject(r, L0.HasPredicate);
 966                 // Don't know how I encountered this but it seems to be possible in some cases..
 967                 // Resource obj = graph.getSingleObject(r, L0.HasObject);
 968                 Resource obj = graph.getPossibleObject(r, L0.HasObject);
 969                 String tmp = htmlEscape( getResourceName(graph, pred) + " -> " + (obj == null ? "No object ?" : getResourceName(graph, obj)) + " (Assertion)" );
 970                 name = tmp.substring(0, Math.min(80, tmp.length()));
 971             } else {
 972                 String resourceName = getResourceName(graph, r);
 973                 if(resourceName.equals("Inverse")) {
 974                     Resource inverse = graph.getPossibleInverse(r);
 975                     if(inverse != null && graph.hasStatement(inverse, L0.ConsistsOf, r))
 976                         resourceName = getResourceName(graph, inverse) + "/Inverse";
 977                 }
 978                 String tmp = htmlEscape( resourceName );
 979                 name = tmp.substring(0, Math.min(80, tmp.length()));
 980             }
 981
 982         } catch (OutOfMemoryError e) {
 983             name = "OutOfMemoryError";
 984         }
 985         String ret = "<a href=\"simantics:browser-link" + getLinkString(r) + "\">"
 986         + name
 987         + "</a>";
 988         if (graph.isInstanceOf(r, L0.Literal)) {
 989             ret += "&nbsp;<a class=\"edit-link\" href=\"simantics:browser-edit-value" + getLinkString(r) + "\">"
 990             + "(edit)"
 991             + "</a>";
 992         }
 993         return ret;
 994     }
 995
 996     private String getStatementRemoveRef(Resource s, Resource p, Resource o) {
 997         return "<a href=\"simantics:browser-remove" + getStatementString(s, p, o)
 998         + "\" title=\"Remove this statement\">X</a>";
 999     }
1000
1001     private void updatePred(StringBuffer content, ReadGraph graph, Resource subj, Resource pred, List<Resource[]> stats) throws DatabaseException {
1002         // Generate output content from statements
1003         String[][] objects = new String[stats.size()][];
1004         for (int i = 0; i < stats.size(); ++i) {
1005             Resource stmSubject = stats.get(i)[0];
1006             Resource object = stats.get(i)[1];
1007
1008             objects[i] = new String[4];
1009             objects[i][0] = getLinkString(object);
1010             objects[i][1] = htmlEscape( getResourceName(graph, object) );
1011             objects[i][2] = getResourceRef(graph, object);
1012
1013             // Make a note if the statement was acquired.
1014             if(!stmSubject.equals(subj)) {
1015                 objects[i][3] = " (in " + getResourceRef(graph, stmSubject) + ")";
1016             }
1017         }
1018
1019         // Sort statements by object name
1020         Arrays.sort(objects, new Comparator<String[]>() {
1021             @Override
1022             public int compare(String[] o1, String[] o2) {
1023                 return AlphanumComparator.CASE_INSENSITIVE_COMPARATOR.compare(o1[1], o2[1]);
1024             }
1025         });
1026
1027         // Output table rows
1028         for (int i = 0; i < objects.length; ++i) {
1029             content.append("<tr>");
1030             // Predicate column
1031             if (i == 0)
1032                 content.append("<td rowspan=\"").append(objects.length).append("\" valign=\"top\">").append(getResourceRef(graph, pred)).append("</td>");
1033
1034             // Object column
1035             if (objects[i][3] == null) content.append("<td>");
1036             else content.append("<td class=\"acquired\">");
1037
1038             content.append(objects[i][2]);
1039             if (objects[i][3] != null)
1040                 content.append(objects[i][3]);
1041
1042             content.append("</td>");
1043
1044             VirtualGraphSupport vgs = graph.getService(VirtualGraphSupport.class);
1045             VirtualGraph vg = vgs.getGraph(graph, subj, pred, links.getRight(objects[i][0]));
1046
1047             if(vg != null) {
1048                 content.append("<td>").append(vg.toString()).append("</td>");
1049             } else {
1050                 content.append("<td>DB</td>");
1051             }
1052
1053
1054             // Statement remove -link column
1055             // Only allowed for non-acquired statements.
1056             if (objects[i][3] == null) {
1057                 content.append("<td class=\"remove\">");
1058                 content.append(getStatementRemoveRef(subj, pred, links.getRight(objects[i][0])));
1059                 content.append("</td>");
1060             }
1061             content.append("</tr>");
1062         }
1063     }
1064
1065     private void updateTag(StringBuffer content, ReadGraph graph, Resource subj, Resource tag) throws DatabaseException {
1066
1067         // Generate output content from statements
1068         String ref = getResourceRef(graph, tag);
1069
1070         content.append("<tr>");
1071         content.append("<td rowspan=\"1\" colspan=\"3\" valign=\"top\">").append(ref).append("</td>");
1072         //content.append("<td>" + name + "</td>");
1073         content.append("<td class=\"remove\">");
1074         content.append(getStatementRemoveRef(subj, tag, subj));
1075         content.append("</td>");
1076         content.append("</tr>");
1077
1078     }
1079
1080     private void updateOrderedSet(StringBuffer content, ReadGraph graph, Resource subj) throws DatabaseException {
1081         //List<Resource> list = OrderedSetUtils.toList(graph, subj);
1082         /*
1083         // Generate output content from statements
1084         String[][] objects = new String[stats.size()][];
1085         for (int i = 0; i < stats.size(); ++i) {
1086             Resource stmSubject = stats.get(i)[0];
1087             Resource object = stats.get(i)[1];
1088
1089             objects[i] = new String[4];
1090             objects[i][0] = getLinkString(object);
1091             objects[i][1] = getResourceName(graph, object);
1092             objects[i][2] = getResourceRef(graph, object);
1093
1094             // Make a note if the statement was acquired.
1095             if(!stmSubject.equals(subj)) {
1096                 objects[i][3] = " (acquired from " + getResourceRef(graph, stmSubject) + ")";
1097             }
1098         }
1099
1100         // Sort statements by object name
1101         Arrays.sort(objects, new Comparator<String[]>() {
1102             @Override
1103             public int compare(String[] o1, String[] o2) {
1104                 return o1[1].compareTo(o2[1]);
1105             }
1106         });*/
1107
1108         List<String> list = new ArrayList<String>();
1109         Resource cur = subj;
1110         while(true) {
1111             try {
1112                 cur = OrderedSetUtils.next(graph, subj, cur);
1113             } catch(DatabaseException e) {
1114                 list.add("<span style=\"color:red;font-weight:bold\">BROKEN ORDERED SET:<br/></span><span style=\"color:red\">" + e.getMessage() + "</span>");
1115                 Resource inv = graph.getPossibleInverse(subj);
1116                 for(Statement stat : graph.getStatements(cur, L0.IsRelatedTo)) {
1117                     if(stat.getSubject().equals(cur)) {
1118                         if(stat.getPredicate().equals(subj)) {
1119                             list.add("next " + getResourceRef(graph, stat.getObject()));
1120                         }
1121                         else if(stat.getPredicate().equals(inv)) {
1122                             list.add("prev " + getResourceRef(graph, stat.getObject()));
1123                         }
1124                     }
1125                 }
1126                 break;
1127             }
1128             if(cur.equals(subj))
1129                 break;
1130             list.add(getResourceRef(graph, cur));
1131         }
1132
1133         // Output table rows
1134         for (int i = 0; i < list.size() ; ++i) {
1135             content.append("<tr>");
1136             // Predicate column
1137             if (i == 0)
1138                 content.append("<td rowspan=\"").append(list.size()).append("\" valign=\"top\">Ordered Set Elements</td>");
1139
1140             // Object column
1141             content.append("<td>");
1142             content.append(list.get(i));
1143             content.append("</td>");
1144
1145             // Statement remove -link column
1146             // Only allowed for non-acquired statements.
1147             /*if (objects[i][3] == null) {
1148                 content.append("<td class=\"remove\">");
1149                 content.append(getStatementRemoveRef(subj, pred, links.getRight(objects[i][0])));
1150                 content.append("</td>");
1151             }*/
1152             content.append("</tr>");
1153         }
1154     }
1155
1156     private void updateLinkedList(StringBuffer content, ReadGraph graph, Resource subj) throws DatabaseException {
1157
1158         List<String> list = new ArrayList<String>();
1159
1160         try {
1161                 List<Resource> resources = ListUtils.toList(graph, subj);
1162                 for(Resource element : resources) {
1163                     list.add(getResourceRef(graph, element));
1164                 }
1165         } catch (DatabaseException e) {
1166                 throw new ValidationException(e);
1167         }
1168
1169         // Output table rows
1170         for (int i = 0; i < list.size() ; ++i) {
1171             content.append("<tr>");
1172             // Predicate column
1173             if (i == 0)
1174                 content.append("<td rowspan=\"").append(list.size()).append("\" valign=\"top\">Linked List Elements</td>");
1175
1176             // Object column
1177             content.append("<td>");
1178             content.append(list.get(i));
1179             content.append("</td><td>DB</td>");
1180
1181             // Statement remove -link column
1182             // Only allowed for non-acquired statements.
1183             /*if (objects[i][3] == null) {
1184                 content.append("<td class=\"remove\">");
1185                 content.append(getStatementRemoveRef(subj, pred, links.getRight(objects[i][0])));
1186                 content.append("</td>");
1187             }*/
1188             content.append("</tr>");
1189         }
1190     }
1191
1192     protected synchronized void updateContent(final ReadGraph graph, Resource... resources) throws DatabaseException {
1193         L0 = Layer0.getInstance(graph);
1194
1195         links.clear();
1196         StringBuffer content = new StringBuffer();
1197
1198         // Generate HTML -page
1199         content.append("<html>\n<head>\n")
1200         .append(getHead())
1201         .append("\n</head>\n")
1202         .append("<body>\n")
1203         .append("<div id=\"mainContent\">\n\n");
1204
1205         for (Resource r : resources) {
1206             if (r == null)
1207                 continue;
1208
1209             String uri = null;
1210             try {
1211                 uri = graph.syncRequest(new ResourceToPossibleURI(r));
1212             } catch (Exception e) {
1213                 ErrorLogger.defaultLogError(e);
1214                 uri = "Cannot get URI: " + e.getMessage();
1215             }
1216
1217             // Top DIV
1218             content.append("<div id=\"top\">\n");
1219             content.append("<table class=\"top\">\n");
1220             if (uri != null) {
1221                 content.append("<tr><td class=\"top_key\">URI</td><td class=\"top_value\"><span id=\"uri\">").append(uri).append("</span></td></tr>\n");
1222             }
1223
1224             XSupport xs = graph.getService(XSupport.class);
1225             boolean immutable = xs.getImmutable(r);
1226
1227             Collection<Statement> statements = graph.getStatements(r, L0.IsWeaklyRelatedTo);
1228             HashMultiMap<Resource, Resource[]> map = new HashMultiMap<Resource, Resource[]>();
1229             for(org.simantics.db.Statement statement : statements) {
1230                 Resource predicate = null;
1231                 Resource subject = null;
1232                 Resource obj = null;
1233                 try {
1234                     predicate = statement.getPredicate();
1235                     subject = statement.getSubject();
1236                     obj = statement.getObject();
1237                     map.add(predicate, new Resource[] {subject, obj});
1238                 } catch (Throwable e) {
1239                     ErrorLogger.defaultLogError("Cannot find statement " + subject + " " + predicate + " " + obj, e);
1240                 }
1241             }
1242             SerialisationSupport ss = graph.getSession().getService(SerialisationSupport.class);
1243             ClusteringSupport support = graph.getSession().getService(ClusteringSupport.class);
1244             content.append("<tr><td class=\"top_key\">Identifiers</td><td class=\"top_value\">");
1245             content.append("<span id=\"resource_id\">")
1246             .append(" RID = $").append(r.getResourceId())
1247             .append(" Resource Key = ").append(ss.getTransientId(r))
1248             .append(" CID = ").append(support.getCluster(r));
1249             content.append("</span></td>");
1250             if (immutable)
1251                 content.append("<td class=\"remove\">[IMMUTABLE]</td>");
1252             content.append("</tr>\n");
1253
1254             boolean isClusterSet = support.isClusterSet(r);
1255             Resource parentSet = support.getClusterSetOfCluster(r);
1256             String parentSetURI = parentSet != null ? graph.getPossibleURI(parentSet) : null;
1257
1258             content.append("<tr><td class=\"top_key\">Clustering</td><td class=\"top_value\">");
1259             content.append("<span id=\"resource_id\">");
1260
1261             if(parentSetURI != null)
1262                 content.append(" Containing cluster set = ").append(parentSetURI);
1263             else if (parentSet != null)
1264                 content.append(" Containing cluster set = ").append(parentSet.toString());
1265             else
1266                 content.append(" Not in any cluster set ");
1267
1268             content.append("</span></td>");
1269             if (isClusterSet)
1270                 content.append("<td class=\"remove\">[CLUSTER SET]</td>");
1271             content.append("</tr>\n");
1272
1273             // If the resource has a value, show it.
1274             String resourceValue = getResourceValue(graph, r);
1275             if (resourceValue != null) {
1276                 content
1277                 .append("<tr><td class=\"top_key\">Attached value</td><td class=\"top_value\">")
1278                 .append(htmlEscape(resourceValue))
1279                 .append("</td></tr>\n");
1280             }
1281
1282             // Close #top
1283             content.append("</table>\n");
1284             content.append("</div>\n");
1285
1286             content.append("\n<div id=\"data\">\n");
1287             content.append("<table>\n")
1288             .append("<tr><th>Predicate</th><th>Object</th><th>Graph</th></tr>")
1289             .append("<tr><td class=\"subtitle\" colspan=\"3\">Basic information</td></tr>");
1290
1291             boolean isOrderedSet = graph.isInstanceOf(r, L0.OrderedSet);
1292             boolean isLinkedList = graph.isInstanceOf(r, L0.List);
1293 //            map.remove(r);
1294
1295             // BASIC INFORMATION:
1296             for (Resource pred :
1297                 new Resource[] {L0.HasName, L0.InstanceOf,
1298                     L0.Inherits, L0.SubrelationOf,
1299                     L0.PartOf, L0.ConsistsOf})
1300                 if (map.containsKey(pred))
1301                     updatePred(content, graph, r, pred, map.remove(pred));
1302
1303             // TAGS
1304             content.append("<tr><td class=\"subtitle\" colspan=\"3\">Tags</td></tr>");
1305             for(Statement stm : statements) {
1306                 if(stm.getSubject().equals(stm.getObject())) {
1307                     updateTag(content, graph, r, stm.getPredicate());
1308                     map.remove(stm.getPredicate());
1309                 }
1310             }
1311
1312             // ORDERED SETS
1313             content.append("<tr><td class=\"subtitle\" colspan=\"3\">Ordered Sets</td></tr>");
1314             for(Statement stm : statements) {
1315                 Resource predicate = stm.getPredicate();
1316                 if(graph.isInstanceOf(stm.getPredicate(), L0.OrderedSet)) {
1317                     updateTag(content, graph, r, stm.getPredicate());
1318                     if(map.get(stm.getPredicate()) != null && map.get(stm.getPredicate()).size() == 1)
1319                         map.remove(stm.getPredicate());
1320                 }
1321                 Resource inverse = graph.getPossibleInverse(predicate);
1322                 if (inverse != null) {
1323                     if(graph.isInstanceOf(inverse, L0.OrderedSet)) {
1324                         if(map.get(stm.getPredicate()) != null && map.get(stm.getPredicate()).size() == 1)
1325                             map.remove(stm.getPredicate());
1326                     }
1327                 } else {
1328                     // FIXME : should we infor missing inverse
1329                 }
1330             }
1331
1332             // IS RELATED TO
1333             content.append("<tr><td class=\"subtitle\" colspan=\"3\">Is Related To</td></tr>");
1334
1335             // ELEMENTS OF ORDERED SET
1336             if(isOrderedSet) {
1337                 //content.append("<tr><td class=\"subtitle\" colspan=\"2\">Ordered set</td></tr>");
1338                 try {
1339                     updateOrderedSet(content, graph, r);
1340                 } catch (ValidationException e) {
1341                     content.append("<td colspan=\"3\"><span style=\"color:red;font-weight:bold\">BROKEN ORDERED SET:<br/></span><span style=\"color:red\">").append(e.getMessage()).append("</span></td>");
1342                 }
1343             }
1344
1345             // ELEMENTS OF LINKED LIST
1346             if(isLinkedList) {
1347                 //content.append("<tr><td class=\"subtitle\" colspan=\"2\">Ordered set</td></tr>");
1348                 try {
1349                     updateLinkedList(content, graph, r);
1350                 } catch (ValidationException e) {
1351                     content.append("<td colspan=\"3\"><span style=\"color:red;font-weight:bold\">BROKEN LINKED LIST:<br/></span><span style=\"color:red\">").append(e.getMessage()).append("</span></td>");
1352                 }
1353             }
1354
1355             // IS RELATED TO (other)
1356             Resource[] preds = map.keySet().toArray(new Resource[0]);
1357             final Map<Resource, String> strmap = new HashMap<Resource, String>(preds.length);
1358             for(Resource pred : preds) {
1359                 String str = htmlEscape( getResourceName(graph, pred) );
1360                 if(str == null)
1361                     str = "<null>";
1362                 strmap.put(pred, str);
1363             }
1364             Arrays.sort(preds, new Comparator<Resource>() {
1365                 @Override
1366                 public int compare(Resource o1, Resource o2) {
1367                     return AlphanumComparator.CASE_INSENSITIVE_COMPARATOR.compare(strmap.get(o1), strmap.get(o2));
1368                 }
1369             });
1370             for(Resource pred : preds)
1371                 if(graph.isSubrelationOf(pred, L0.IsRelatedTo))
1372                     updatePred(content, graph, r, pred, map.get(pred));
1373
1374             // OTHER STATEMENTS
1375             content.append("<tr><td class=\"subtitle\" colspan=\"3\">Other statements</td></tr>");
1376             for(Resource pred : preds)
1377                 if(!graph.isSubrelationOf(pred, L0.IsRelatedTo))
1378                     updatePred(content, graph, r, pred, map.get(pred));
1379             content.append("</table>\n");
1380         }
1381         // Close #data
1382         content.append("</div>\n\n");
1383         // Close #mainContent
1384         content.append("</div>\n");
1385         content.append("</body>\n</html>\n");
1386
1387         // Update content
1388         final String finalContent = content.toString();
1389         if (!isDisposed()) {
1390             getDisplay().asyncExec(new Runnable() {
1391                 @Override
1392                 public void run() {
1393                     if (!browser.isDisposed())
1394                         browser.setText(finalContent);
1395                 }
1396             });
1397         }
1398     }
1399
1400     private String getResourceValue(ReadGraph graph, Resource r) {
1401         try {
1402             if (graph.hasValue(r)) {
1403                 // too large array may cause application to run out of memory.
1404                 //System.out.println("getValue(" + NameUtils.getSafeName(graph, r, true));
1405                 Datatype type = graph.getPossibleRelatedValue(r, L0.HasDataType, Bindings.getBindingUnchecked(Datatype.class));
1406                 if (type != null) {
1407                     Binding rviBinding = graph.getService(Databoard.class).getBindingUnchecked( RVI.class );
1408                     if (type.equals( rviBinding.type() )) {
1409                         RVI rvi = graph.getValue(r, rviBinding);
1410                         try {
1411                             Variable v = Variables.getConfigurationContext( graph, r );
1412                             return rvi.asString(graph, v);
1413                         } catch (DatabaseException dbe ) {
1414                             return rvi.toString( graph );
1415                         }
1416                     } else {
1417                         Binding b = Bindings.getBinding(type);
1418                         Object v = graph.getValue(r, b);
1419                         Serializer s = Bindings.getSerializerUnchecked(b);
1420                         int size = s.getSize(v);
1421                         if (size > RESOURCE_VALUE_MAX_SIZE) {
1422                             return "Approx. " + size + " byte literal of type " + type.toSingleLineString();
1423                         } else {
1424                             return b.toString(v, false);
1425                         }
1426                     }
1427                 } else {
1428                     Object o = graph.getValue(r);
1429                     return toName(o);
1430                 }
1431             }
1432             return null;
1433         } catch (DatabaseException e) {
1434             return e.getMessage();
1435         } catch (IOException e) {
1436             return e.getMessage();
1437         } catch (BindingException e) {
1438             return e.getMessage();
1439         }
1440     }
1441
1442     private static String safeReadableString(ReadGraph g, Resource r) {
1443         try {
1444             return NameUtils.getSafeName(g, r);
1445         } catch(Throwable throwable) {
1446             ErrorLogger.defaultLogError(throwable);
1447             return "<font color=\"red\"><i>"+throwable.getClass().getName()+"</i> "+throwable.getMessage()+"</font>";
1448         }
1449     }
1450
1451 //    private static String safeReadableString(IEntity t) {
1452 //        try {
1453 //            return ResourceDebugUtils.getReadableNameForEntity(t);
1454 //        } catch(Throwable throwable) {
1455 //            throwable.printStackTrace();
1456 //            return "<font color=\"red\"><i>"+throwable.getClass().getName()+"</i> "+throwable.getMessage()+"</font>";
1457 //        }
1458 //    }
1459
1460     private String getLinkString(Container<Resource> t) {
1461         String link = links.getLeft(t.get());
1462         if(link == null) {
1463             link = UUID.randomUUID().toString();
1464             links.map(link, t.get());
1465         }
1466         return link;
1467     }
1468
1469 //    private String getPropertyEditString(Container<Resource> t) {
1470 //        String link = links.getLeft(t.get());
1471 //        if(link == null) {
1472 //            link = UUID.randomUUID().toString();
1473 //            links.map(link, t.get());
1474 //        }
1475 //        return link;
1476 //    }
1477
1478     private String getStatementString(Resource _s, Resource _p, Resource _o) {
1479         String s = getLinkString(_s);
1480         String p = getLinkString(_p);
1481         String o = getLinkString(_o);
1482         return s + STATEMENT_PART_SEPARATOR + p + STATEMENT_PART_SEPARATOR + o;
1483     }
1484
1485 //    private String getStatementString(Statement stm) {
1486 //        String s = getLinkString(stm.getSubject());
1487 //        String p = getLinkString(stm.getPredicate());
1488 //        String o = getLinkString(stm.getObject());
1489 //        return s + STATEMENT_PART_SEPARATOR + p + STATEMENT_PART_SEPARATOR + o;
1490 //    }
1491
1492 //    private String toOutgoingTableRow(IEntity subject, Statement stm) {
1493 //        boolean isAcquired = !subject.equals(stm.getSubject());
1494 //
1495 //        String plainCell = "%s";
1496 //        String hrefCell = "<a href=\"%s\">%s</a>";
1497 //        String formatTemplate = isAcquired
1498 //                ? "<tr>\n<td class=\"acquired\">{0}</td>\n<td class=\"acquired\">{1}</td>\n<td class=\"acquired\">{1}</td>\n<td class=\"acquired\">{1}</td>\n</tr>"
1499 //                : "<tr>\n<td>{1}</td>\n<td>{1}</td>\n<td>{1}</td>\n<td>{1}</td>\n</tr>";
1500 //        String format = NLS.bind(formatTemplate, plainCell, hrefCell);
1501 ////        System.out.println("format: " + format);
1502 //
1503 //        IEntity s = stm.getSubject();
1504 //        IEntity p = stm.getPredicate();
1505 //        IEntity o = stm.getObject();
1506 //
1507 ////        String timePart = "[" + timeToString(t.getBegin()) + ", " + timeToString(t.getEnd()) + "]";
1508 //
1509 //        try {
1510 //            return !isAcquired
1511 //                ? String.format(format,
1512 //                    "about:blank-remove" + getStatementString(stm), "Remove",
1513 //                    "about:blank-link" + getLinkString(s), safeReadableString(s),
1514 //                    "about:blank-link" + getLinkString(p), safeReadableString(p),
1515 //                    "about:blank-link" + getLinkString(o), safeReadableString(o))
1516 //                : String.format(format,
1517 //                    "Acquired",
1518 //                    "about:blank-link" + getLinkString(s), safeReadableString(s),
1519 //                    "about:blank-link" + getLinkString(p), safeReadableString(p),
1520 //                    "about:blank-link" + getLinkString(o), safeReadableString(o)
1521 //            );
1522 //        } catch (Throwable throwable) {
1523 //            return "<tr><td colspan=\"4\"><font color=\"red\"><i>"+throwable.getClass().getName()+"</i> "+throwable.getMessage()+"</font></td></tr>";
1524 //        }
1525 //    }
1526
1527 //    private String intervalToString(Interval time) {
1528 //        return timeToString(time.getBegin()) + ", " + timeToString(time.getEnd());
1529 //    }
1530 //
1531 //    DateFormat dateTimeFormat = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT);
1532 //
1533 //    private String timeToString(long time) {
1534 //        if (time == Long.MIN_VALUE)
1535 //            return "-&infin;";
1536 //        if (time == Long.MAX_VALUE)
1537 //            return "+&infin;";
1538 //        //return String.valueOf(time);
1539 //        Date d = new Date(time);
1540 //        return dateTimeFormat.format(d);
1541 //    }
1542
1543     private String getHead() {
1544         String result = "";
1545         if (cssPath != null) {
1546             result = "<link href=\"" + cssPath + "\" rel=\"stylesheet\" type=\"text/css\">";
1547         }
1548         return result;
1549     }
1550
1551 }