bundles/org.simantics.modeling/src/org/simantics/modeling/SCLScenegraph.java

   1 package org.simantics.modeling;
   2
   3 import java.awt.BasicStroke;
   4 import java.awt.Color;
   5 import java.awt.Dimension;
   6 import java.awt.RenderingHints;
   7 import java.awt.RenderingHints.Key;
   8 import java.awt.geom.AffineTransform;
   9 import java.awt.geom.Rectangle2D;
  10 import java.io.ByteArrayOutputStream;
  11 import java.io.OutputStreamWriter;
  12 import java.util.ArrayList;
  13 import java.util.Arrays;
  14 import java.util.Collection;
  15 import java.util.HashMap;
  16 import java.util.HashSet;
  17 import java.util.List;
  18 import java.util.Map;
  19 import java.util.Random;
  20 import java.util.Set;
  21 import java.util.UUID;
  22 import java.util.function.Function;
  23 import java.util.stream.Collectors;
  24
  25 import javax.xml.transform.OutputKeys;
  26 import javax.xml.transform.Transformer;
  27 import javax.xml.transform.TransformerFactory;
  28 import javax.xml.transform.dom.DOMSource;
  29 import javax.xml.transform.stream.StreamResult;
  30
  31 import org.apache.batik.dom.GenericDOMImplementation;
  32 import org.apache.batik.svggen.SVGGeneratorContext;
  33 import org.apache.batik.svggen.SVGGraphics2D;
  34 import org.simantics.Simantics;
  35 import org.simantics.datatypes.literal.GUID;
  36 import org.simantics.db.ReadGraph;
  37 import org.simantics.db.Resource;
  38 import org.simantics.db.common.request.IndexRoot;
  39 import org.simantics.db.common.request.ResourceRead;
  40 import org.simantics.db.common.request.UnaryRead;
  41 import org.simantics.db.exception.DatabaseException;
  42 import org.simantics.db.exception.RuntimeDatabaseException;
  43 import org.simantics.db.layer0.variable.Variables;
  44 import org.simantics.diagram.elements.DecorationSVGNode;
  45 import org.simantics.diagram.elements.DiagramNodeUtil;
  46 import org.simantics.diagram.elements.TextGridNode;
  47 import org.simantics.diagram.elements.TextNode;
  48 import org.simantics.diagram.stubs.DiagramResource;
  49 import org.simantics.g2d.canvas.Hints;
  50 import org.simantics.g2d.canvas.ICanvasContext;
  51 import org.simantics.g2d.diagram.DiagramHints;
  52 import org.simantics.g2d.diagram.IDiagram;
  53 import org.simantics.g2d.diagram.handler.DataElementMap;
  54 import org.simantics.g2d.diagram.participant.Selection;
  55 import org.simantics.g2d.element.IElement;
  56 import org.simantics.g2d.scenegraph.ICanvasSceneGraphProvider;
  57 import org.simantics.g2d.utils.CanvasUtils;
  58 import org.simantics.layer0.Layer0;
  59 import org.simantics.scenegraph.INode;
  60 import org.simantics.scenegraph.ParentNode;
  61 import org.simantics.scenegraph.g2d.G2DParentNode;
  62 import org.simantics.scenegraph.g2d.G2DRenderingHints;
  63 import org.simantics.scenegraph.g2d.G2DSceneGraph;
  64 import org.simantics.scenegraph.g2d.IG2DNode;
  65 import org.simantics.scenegraph.g2d.IG2DNodeVisitor;
  66 import org.simantics.scenegraph.g2d.events.command.Commands;
  67 import org.simantics.scenegraph.g2d.nodes.BackgroundNode;
  68 import org.simantics.scenegraph.g2d.nodes.BoundsNode;
  69 import org.simantics.scenegraph.g2d.nodes.ConnectionNode;
  70 import org.simantics.scenegraph.g2d.nodes.DataNode;
  71 import org.simantics.scenegraph.g2d.nodes.LinkNode;
  72 import org.simantics.scenegraph.g2d.nodes.NavigationNode;
  73 import org.simantics.scenegraph.g2d.nodes.SVGNode;
  74 import org.simantics.scenegraph.g2d.nodes.SelectionNode;
  75 import org.simantics.scenegraph.g2d.nodes.SingleElementNode;
  76 import org.simantics.scenegraph.g2d.nodes.connection.RouteGraphNode;
  77 import org.simantics.scenegraph.g2d.nodes.spatial.RTreeNode;
  78 import org.simantics.scenegraph.utils.NodeUtil;
  79 import org.simantics.scl.runtime.function.Function1;
  80 import org.simantics.scl.runtime.tuple.Tuple2;
  81 import org.simantics.trend.impl.ItemNode;
  82 import org.simantics.utils.threads.ThreadUtils;
  83 import org.slf4j.Logger;
  84 import org.slf4j.LoggerFactory;
  85 import org.w3c.dom.DOMImplementation;
  86 import org.w3c.dom.Document;
  87 import org.w3c.dom.Element;
  88 import org.w3c.dom.NodeList;
  89
  90 public class SCLScenegraph {
  91
  92         private static final Logger LOGGER = LoggerFactory.getLogger(SCLScenegraph.class);
  93
  94         private static final String MAIN_SECTION = "main";
  95         private static final String SELECTION_SECTION = "selection";
  96         private static final String SELECTION_MASK_SECTION = "selectionMask";
  97
  98         private static final String[] ALL_SECTIONS = { MAIN_SECTION, SELECTION_SECTION, SELECTION_MASK_SECTION };
  99
 100         // Changed from 0.001 to 0.0001 to prevent creation of huge BufferedImage's when
 101         // generating PDF from SVG. If SVG contains any transparency then Batik uses
 102         // bitmap-rendering which remarkably slows things down
 103         // See org.apache.batik.gvt.AbstractGraphicsNode.paint(Graphics2D) where decisions are made
 104         // if AlphaComposite should be painted
 105         private static final String OPACITY = "0.0001";
 106
 107         @Deprecated
 108         public static ICanvasSceneGraphProvider getICanvasSceneGraphProvider(Resource model, Resource diagram, String diagramRVI) throws DatabaseException, InterruptedException {
 109                 ICanvasSceneGraphProvider provider = DiagramNodeUtil.loadSceneGraphProvider(model, diagram, diagramRVI);
 110                 return provider;
 111         }
 112
 113         @Deprecated
 114         public static void disposeSceneGraphProvider(ICanvasSceneGraphProvider provider) {
 115                 provider.dispose();
 116         }
 117
 118     public static <T> T doWithICanvasSceneGraphProvider(Resource diagram, Function1<ICanvasSceneGraphProvider, T> func) throws DatabaseException {
 119         return doWithICanvasSceneGraphProvider(diagram, (Function<ICanvasSceneGraphProvider, T>) provider -> func.apply(provider));
 120     }
 121
 122     public static <T> T doWithICanvasSceneGraphProvider(Resource diagram, Function<ICanvasSceneGraphProvider, T> func) throws DatabaseException {
 123         Tuple2 result = Simantics.getSession().syncRequest(new ResourceRead<Tuple2>(diagram) {
 124
 125             @Override
 126             public Tuple2 perform(ReadGraph graph) throws DatabaseException {
 127                 Resource indexRoot = graph.syncRequest(new IndexRoot(resource));
 128                 String diagramRVI = Variables.getRVI(graph, resource);
 129                 return new Tuple2(indexRoot, diagramRVI);
 130             }
 131         });
 132         ICanvasSceneGraphProvider provider = DiagramNodeUtil.loadSceneGraphProvider((Resource) result.c0, diagram, (String) result.c1);
 133         try {
 134             return func.apply(provider);
 135         } finally {
 136             provider.dispose();
 137         }
 138     }
 139
 140     public static <T> T doWithCanvasContext(Resource diagram, Function1<ICanvasContext, T> func) throws DatabaseException {
 141         return doWithCanvasContext(diagram, (Function<ICanvasContext, T>) canvasContext -> func.apply(canvasContext));
 142     }
 143
 144     public static <T> T doWithCanvasContext(Resource diagram, Function<ICanvasContext, T> func) throws DatabaseException {
 145         return doWithICanvasSceneGraphProvider(diagram, (Function<ICanvasSceneGraphProvider, T>) provider -> func.apply(provider.getCanvasContext()));
 146     }
 147
 148         public static String getNodeTransform(ICanvasContext ctx, String name) {
 149
 150                 Set<TextNode> texts = NodeUtil.collectNodes(ctx.getSceneGraph(), TextNode.class);
 151                 for (TextNode text : texts) {
 152                         String nodeName = NodeUtil.getNodeName(text);
 153                         if (nodeName.equals(name)) {
 154                                 String transform = text.getTransform().toString();
 155                                 return transform;
 156                         }
 157                 }
 158                 return "No node found";
 159         }
 160
 161         public static String getNodeText(ICanvasContext ctx, String name) {
 162
 163                 Set<TextNode> texts = NodeUtil.collectNodes(ctx.getSceneGraph(), TextNode.class);
 164                 for (TextNode text : texts) {
 165                         String nodeName = NodeUtil.getNodeName(text);
 166                         if (nodeName.equals(name)) {
 167                                 String texti = text.getText();
 168                                 return texti;
 169                         }
 170                 }
 171                 return "No node found";
 172         }
 173
 174         public static String getNodeCount(ICanvasContext ctx) {
 175                 G2DSceneGraph g2 = ctx.getSceneGraph();
 176                 int amount = NodeUtil.countTreeNodes(g2);
 177                 return "Node count: " + amount;
 178         }
 179
 180     public static String getAllNodes (ICanvasContext ctx) {
 181
 182         Set<G2DSceneGraph> g2 = NodeUtil.collectNodes(ctx.getSceneGraph(), G2DSceneGraph.class);
 183         int amount = g2.size() +1;
 184         return "All nodes: " + amount;
 185     }
 186
 187     public static String getBoundsNodes (ICanvasContext ctx) {
 188
 189         Set<BoundsNode> bn = NodeUtil.collectNodes(ctx.getSceneGraph(), BoundsNode.class);
 190         int amount = bn.size();
 191         return "BoundsNodes: " + amount;
 192     }
 193
 194     public static String getBackgroundNodes (ICanvasContext ctx) {
 195
 196         Set<BackgroundNode> bg = NodeUtil.collectNodes(ctx.getSceneGraph(), BackgroundNode.class);
 197         int amount = bg.size();
 198         return "BackgroundNodes: " + amount;
 199     }
 200
 201     public static String getDataNodes (ICanvasContext ctx) {
 202
 203         Set<DataNode> dn = NodeUtil.collectNodes(ctx.getSceneGraph(), DataNode.class);
 204         int amount = dn.size();
 205         return "DataNodes: " + amount;
 206     }
 207
 208     public static String getNavigationNodes (ICanvasContext ctx) {
 209
 210         Set<NavigationNode> g2 = NodeUtil.collectNodes(ctx.getSceneGraph(), NavigationNode.class);
 211         int amount = g2.size();
 212         return "NavigationNodes: " + amount;
 213     }
 214
 215     public static String getParentNodes (ICanvasContext ctx) {
 216
 217         Set<G2DParentNode> g2 = NodeUtil.collectNodes(ctx.getSceneGraph(), G2DParentNode.class);
 218         int amount = g2.size();
 219         return "ParentNodes: " + amount;
 220     }
 221
 222     public static String getDecorationNodes (ICanvasContext ctx) {
 223
 224         Set<DecorationSVGNode> deco = NodeUtil.collectNodes(ctx.getSceneGraph(), DecorationSVGNode.class);
 225         int amount = deco.size();
 226         return "DecorationNodes: " + amount;
 227     }
 228
 229     public static String getSingleElementNodes (ICanvasContext ctx) {
 230
 231         Set<SingleElementNode> g2 = NodeUtil.collectNodes(ctx.getSceneGraph(), SingleElementNode.class);
 232         int amount = g2.size();
 233         return "SingleElementNodes: " + amount;
 234     }
 235
 236     public static String getConnectionNodes (ICanvasContext ctx) {
 237
 238         Set<ConnectionNode> g2 = NodeUtil.collectNodes(ctx.getSceneGraph(), ConnectionNode.class);
 239         int amount = g2.size();
 240         return "ConnectionNodes: " + amount;
 241     }
 242
 243     public static String getTextNodes (ICanvasContext ctx) {
 244
 245         Set<TextNode> tn = NodeUtil.collectNodes(ctx.getSceneGraph(), TextNode.class);
 246         Set<TextGridNode> tgn = NodeUtil.collectNodes(ctx.getSceneGraph(), TextGridNode.class);
 247         int amount = tn.size() + tgn.size();
 248         return "TextNodes: " + amount;
 249     }
 250
 251     public static String getItemNodes (ICanvasContext ctx) {
 252
 253         Set<ItemNode> item = NodeUtil.collectNodes(ctx.getSceneGraph(), ItemNode.class);
 254         int amount = item.size();
 255         return "ItemNodes: " + amount;
 256     }
 257
 258     public static String editNodeText (ICanvasContext ctx, String module, String previous_value, String new_value) {
 259
 260         Set<TextNode> textGridNodes = NodeUtil.collectNodes(ctx.getSceneGraph(), TextNode.class);
 261         for (TextNode modulenode : textGridNodes) {
 262                 if (module.equals(modulenode.getText())) {
 263                         //System.out.println("Module what we were looking for: " + module);
 264                         //System.out.println("Modulenode: " + modulenode.getText());
 265
 266                         ParentNode<?> parentnode = modulenode.getParent();
 267                         //System.out.println("Parentnode: " + parentnode);
 268
 269                         Collection<TextNode> textnodes = (Collection<TextNode>) parentnode.getNodes();
 270                         for (TextNode valuenode : textnodes) {
 271                                 if (previous_value.equals(valuenode.getText())) {
 272                                         //System.out.println("Value what we were looking for: " + previous_value);
 273                                         //System.out.println("Valuenode: " + valuenode.getText());
 274
 275                                         //valuenode.setEditMode(true);
 276                                         valuenode.activateEdit(0, null, ctx);
 277                                         valuenode.setText(new_value);
 278                                         valuenode.fireTextEditingEnded();
 279
 280                                         //System.out.println("valuenode modified: " + valuenode);
 281                                         return "Modified module " + module + " with value " + new_value;
 282                                 }
 283                         }
 284                         return "Not found module : " + module;
 285                 }
 286         }
 287         return "No nodes in scenegraph!";
 288     }
 289
 290     /**
 291      * Returns background color of a canvasContext or null.
 292      * @param ctx
 293      * @return color in RGBA List<Integer> format, or null.
 294      */
 295     public static List<Integer> getBackgroundColor(ICanvasContext ctx) {
 296         Color color = ctx.getDefaultHintContext().getHint(Hints.KEY_BACKGROUND_COLOR);
 297         if (color == null)
 298                 return null;
 299         ArrayList<Integer> rgba = new ArrayList<>(4);
 300         rgba.add(color.getRed());
 301         rgba.add(color.getGreen());
 302         rgba.add(color.getBlue());
 303         rgba.add(color.getAlpha());
 304         return rgba;
 305     }
 306
 307     public static String sceneGraphTest (ICanvasContext ctx, String module, String value) {
 308
 309         boolean module_founded = false;
 310         boolean value_founded = false;
 311
 312         Set<G2DSceneGraph> g2 = NodeUtil.collectNodes(ctx.getSceneGraph(), G2DSceneGraph.class);
 313         System.out.println("Total amount of nodes: " + g2.size() + 1);
 314
 315         Set<TextGridNode> grid = NodeUtil.collectNodes(ctx.getSceneGraph(), TextGridNode.class);
 316         Integer textGridNodeAmount = grid.size();
 317         System.out.println("Amount of TextGridNodes " + textGridNodeAmount);
 318
 319         Set<TextNode> texts = NodeUtil.collectNodes(ctx.getSceneGraph(), TextNode.class);
 320         Integer textNodeAmount = grid.size();
 321         System.out.println("Amount of TextNodes " + textNodeAmount);
 322
 323         for (TextNode node : texts) {
 324             if (module.equals(node.getText())) {
 325                 module_founded = true;
 326                 System.out.println("Correct module " + module + " founded.");
 327             }
 328             if (value.equals(node.getText())) {
 329                 value_founded = true;
 330                 System.out.println("Correct value " + value + " founded.");
 331             }
 332         }
 333
 334         if (value_founded == true && module_founded == true) {
 335                 return "Found both correct module " + module + " and value " + value;
 336         }
 337         if (value_founded == false && module_founded == true) {
 338                 return "Found only correct module " + module + " but not value " + value;
 339         }
 340         if (value_founded == true && module_founded == false) {
 341                 return "Found only correct value " + value + " but not module " + module;
 342         }
 343         else {
 344                 return "Didn't found either module " + module + " or value " + value;
 345         }
 346     }
 347
 348     public static boolean copyPaste (final ICanvasContext source_ctx, final ICanvasContext target_ctx, List<Resource> modules) throws DatabaseException {
 349
 350         IDiagram idiagram = source_ctx.getDefaultHintContext().getHint(DiagramHints.KEY_DIAGRAM);
 351
 352                 DataElementMap dem = idiagram.getDiagramClass().getAtMostOneItemOfClass(DataElementMap.class);
 353                 if (dem != null) {
 354                         final Collection<IElement> newSelection = new ArrayList<IElement>();
 355                         for (Resource module : modules) {
 356                                 IElement element = dem.getElement(idiagram, module);
 357                                 if (element != null) {
 358                                         newSelection.add(element);
 359                                 } else {
 360                                         throw new DatabaseException("Could not find IElement for " + element);
 361                                 }
 362                         }
 363
 364                         ThreadUtils.syncExec(source_ctx.getThreadAccess(), new Runnable() {
 365                     @Override
 366                     public void run() {
 367                         if (source_ctx.isDisposed())
 368                             return;
 369                         Selection selection = source_ctx.getAtMostOneItemOfClass(Selection.class);
 370                         if (selection != null) {
 371                             // This prevents workbench selection from being left over.
 372                             // Also prevents scene graph crap from being left on the screen.
 373                             selection.setSelection(0, newSelection);
 374                         }
 375                                 CanvasUtils.sendCommand(source_ctx, Commands.COPY);
 376                                 CanvasUtils.sendCommand(target_ctx, Commands.PASTE);
 377                     }
 378                 });
 379
 380                 //}
 381
 382                 while(source_ctx.getEventQueue().size() > 0) {
 383                         try {
 384                                 Thread.sleep(10);
 385                         } catch (InterruptedException e) {
 386                                 throw new DatabaseException(e);
 387                         }
 388                 }
 389
 390                 ThreadUtils.syncExec(source_ctx.getThreadAccess(), new Runnable() {
 391             @Override
 392             public void run() {
 393             }
 394         });
 395
 396                 }
 397                 return true;
 398     }
 399
 400         static class Generator extends SVGGraphics2D {
 401
 402                 int elemLevel = 0;
 403                 String newElementId = null;
 404                 ArrayList<Element> elements = new ArrayList<Element>();
 405
 406                 public static final String svgNS = "http://www.w3.org/2000/svg";
 407
 408                 public Generator(SVGGeneratorContext ctx, boolean textAsShapes) {
 409                         super(ctx, textAsShapes);
 410                 }
 411
 412                 public Generator(Document document) {
 413                         super(document);
 414                         // prevent batik comment in each g-element
 415                         getGeneratorContext().setComment(null);
 416                 }
 417
 418                 @Override
 419                 public Element getRoot() {
 420                         Element root = super.getRoot();
 421                         for(Element e : elements) {
 422                                 root.appendChild(e);
 423                         }
 424                         return root;
 425                 }
 426
 427                 @Override
 428                 public void setRenderingHint(Key arg0, Object arg1) {
 429                         if(G2DRenderingHints.KEY_BEGIN_ELEMENT == arg0) {
 430                                 elemLevel++;
 431                         }
 432                         if(G2DRenderingHints.KEY_ELEMENT_ID == arg0) {
 433                                 if(arg1 != null)
 434                                         newElementId = arg1.toString();
 435                                 else
 436                                         newElementId = UUID.randomUUID().toString();
 437                         }
 438                         if(G2DRenderingHints.KEY_END_ELEMENT == arg0) {
 439                                 elemLevel--;
 440                                 if(elemLevel == 0) {
 441                                         Element group = getDOMFactory().createElement(SVG_G_TAG);
 442                                         //Element group = getDOMFactory().createElementNS(SVG_NAMESPACE_URI, SVG_G_TAG);
 443                                         group.setAttributeNS(null, "id", newElementId);
 444                                         group.setAttributeNS(null, "class", arg1.toString());
 445                                         getRoot(group);
 446                                         elements.add(group);
 447                                 }
 448                         }
 449                         super.setRenderingHint(arg0, arg1);
 450                 }
 451
 452         }
 453
 454         public static Element renderSVGNode(SVGGraphics2D svgGenerator, IG2DNode node) {
 455
 456                 try {
 457
 458                         svgGenerator.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 459                         svgGenerator.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
 460                         svgGenerator.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 461
 462                         node.render(svgGenerator);
 463
 464                 } catch (Throwable t) {
 465                         LOGGER.error("Problems rendering scene graph to SVG", t);
 466                 }
 467
 468                 return svgGenerator.getRoot();
 469         }
 470
 471         public static String printSVGDocument(Element doce) {
 472
 473                 StringBuilder result = new StringBuilder();
 474
 475                 NodeList nl =  doce.getChildNodes();
 476
 477                 for(int i=0;i<nl.getLength();i++) {
 478
 479                         ByteArrayOutputStream os = new ByteArrayOutputStream();
 480
 481                         try {
 482
 483                                 TransformerFactory tf = TransformerFactory.newInstance();
 484                                 Transformer transformer = tf.newTransformer();
 485                                 transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
 486                                 transformer.setOutputProperty(OutputKeys.STANDALONE, "no");
 487                                 transformer.setOutputProperty(OutputKeys.METHOD, "xml");
 488                                 transformer.setOutputProperty(OutputKeys.INDENT, "yes");
 489                                 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
 490                                 transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
 491
 492                                 transformer.transform(new DOMSource(nl.item(i)),
 493                                                 new StreamResult(new OutputStreamWriter(os, "UTF-8")));
 494
 495                                 os.flush();
 496                                 os.close();
 497
 498                         } catch (Throwable t) {
 499                                 LOGGER.error("Problems formatting SVGDocument to text.", t);
 500                         }
 501
 502                         result.append(new String(os.toByteArray()));
 503
 504                 }
 505
 506                 return result.toString();
 507
 508         }
 509
 510         public static String renderSVG3(ICanvasContext ctx) {
 511                 return renderSVG3(ctx, -1, -1);
 512         }
 513
 514         public static String renderSVG3(ICanvasContext ctx, double width, double height) {
 515         return renderSVG0(width, height, ctx, p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2)));
 516         }
 517
 518     /**
 519      * @param graph
 520      * @param component
 521      * @throws DatabaseException
 522      */
 523     private static Object[] createURIBasedL0Identifier(ReadGraph graph, Resource component) throws DatabaseException {
 524         String uri = graph.getPossibleURI(component);
 525         int hashCode = uri.hashCode();
 526         Random random = new Random(hashCode);
 527         long l1 = random.nextLong();
 528         long l2 = random.nextLong();
 529         return new Object[] { l1, l2 };
 530     }
 531
 532     /**
 533      * Default no-op mapper
 534      */
 535     private static final Function1<Set<?>, Map<?, ?>> mapper = p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2));
 536
 537     public static String renderSVG(ICanvasContext ctx, double width, double height) {
 538         return renderSVG0(width, height, ctx, mapper);
 539     }
 540
 541     public static String renderSVG(ICanvasContext ctx) {
 542         return renderSVG(ctx, -1, -1);
 543     }
 544
 545     public static String renderSVGMapIdentifiers(ICanvasContext ctx) {
 546                 return renderSVGMapIdentifiers(ctx, -1, -1);
 547     }
 548
 549     /**
 550      * Renders ICanvasContext into SVG by mapping the SVG id's into URI based
 551      * GUID's
 552      *
 553      * @param ctx
 554      * @return
 555      */
 556     public static String renderSVGMapIdentifiers(ICanvasContext ctx, double width, double height) {
 557         return renderSVG0(width, height, ctx, new Function1<Set<?>, Map<?, ?>>() {
 558
 559             @Override
 560             public Map<?, ?> apply(Set<?> p0) {
 561                 try {
 562                     return Simantics.getSession().syncRequest(new UnaryRead<Set<?>, Map<?, ?>>(p0) {
 563
 564                         @Override
 565                         public Map<?, ?> perform(ReadGraph graph) throws DatabaseException {
 566                             ModelingResources MOD = ModelingResources.getInstance(graph);
 567                             DiagramResource DIA = DiagramResource.getInstance(graph);
 568                             Layer0 L0 = Layer0.getInstance(graph);
 569                             return parameter.stream().collect(Collectors.toMap(p -> p, p -> {
 570                                 try {
 571                                     if (p instanceof Resource) {
 572                                         Resource element = (Resource) p;
 573                                         if (graph.isInstanceOf(element, DIA.Element)) {
 574                                             Resource component = graph.getPossibleObject(element, MOD.ElementToComponent);
 575                                             if (component != null) {
 576                                                 GUID identifier = graph.getPossibleRelatedValue(component, L0.identifier, GUID.BINDING);
 577                                                 if (identifier != null) {
 578                                                     return Arrays.toString(createURIBasedL0Identifier(graph, component));
 579                                                 } else {
 580                                                     LOGGER.error("Component {} does not have GUID identifier!", component);
 581                                                 }
 582                                             } else if (graph.isInstanceOf(element, DIA.Connection) || graph.isInstanceOf(element, DIA.Terminal)) {
 583                                                 // Ok, lets create a hashcode for connections and terminals as they do not have identifiers
 584                                                 return graph.getURI(element).hashCode();
 585                                             } else {
 586                                                 // Ok, lets create a hashcode or either return empty string in cases where no ID is required
 587                                                 if (graph.hasStatement(element, L0.HasName))
 588                                                     return graph.getURI(element).hashCode();
 589                                                 return "";
 590                                             }
 591                                         }
 592                                     } else {
 593                                         LOGGER.error("Parameter p {} is not resource but it is {}", p, p.getClass());
 594                                     }
 595                                     return p;
 596                                 } catch (DatabaseException e) {
 597                                     throw new RuntimeDatabaseException(e);
 598                                 }
 599                             }));
 600                         }
 601                     });
 602                 } catch (DatabaseException e) {
 603                     LOGGER.error("Could not apply mappings", e);
 604                     throw new RuntimeDatabaseException(e);
 605                 }
 606             }
 607         });
 608         }
 609
 610     static class RenderSVGContext {
 611
 612         Map<String,StringBuilder> documents = new HashMap<>();
 613
 614         public void append(String[] keys, String svgText) {
 615                 for(String key : keys) append(key, svgText);
 616         }
 617
 618         public void append(String key, String svgText) {
 619                 StringBuilder builder = documents.get(key);
 620                 if(builder == null) {
 621                         builder = new StringBuilder();
 622                         documents.put(key, builder);
 623                 }
 624                 builder.append(svgText);
 625         }
 626
 627         public void append(RenderSVGContext other) {
 628                 for(String key : other.documents.keySet()) {
 629                         append(key, other.get(key));
 630                 }
 631         }
 632
 633         public String get(String key) {
 634                 StringBuilder builder = documents.get(key);
 635                 if(builder == null) return "";
 636                 else return builder.toString();
 637         }
 638
 639     }
 640
 641         private static String renderSVG0(double width, double height, ICanvasContext ctx, Function1<Set<?>, Map<?, ?>> mappingFunction) {
 642
 643                 // Get a DOMImplementation.
 644                 DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
 645
 646                 // Create an instance of org.w3c.dom.Document.
 647                 String svgNS = "http://www.w3.org/2000/svg";
 648                 Document document = domImpl.createDocument(svgNS, "svg", null);
 649
 650                 // Create an instance of the SVG Generator.
 651                 SVGGraphics2D svgGenerator = new Generator(document);
 652
 653                 RenderSVGContext result = new RenderSVGContext();
 654
 655                 double[] matrix = new double[6];
 656                 try {
 657
 658             Selection selection = ctx.getAtMostOneItemOfClass(Selection.class);
 659             if (selection != null) {
 660                 // This prevents workbench selection from being left over.
 661                 // Also prevents scene graph crap from being left on the screen.
 662                 IDiagram d = ctx.getDefaultHintContext().getHint(DiagramHints.KEY_DIAGRAM);
 663                 selection.setSelection(0, d.getElements());
 664             }
 665
 666                         G2DSceneGraph sg = ctx.getSceneGraph();
 667                         sg.performCleanup();
 668                         G2DParentNode root = (G2DParentNode) sg.getRootNode();
 669
 670                         // rtree is the actual content of the diagram
 671                         RTreeNode rtree = NodeUtil.getNearestChildByClass(root, RTreeNode.class);
 672                         Rectangle2D rtreeBounds = NodeUtil.getLocalBounds(rtree);
 673
 674                         // get the bounds of the content
 675                         Rectangle2D content = rtreeBounds;
 676
 677
 678                         if (content != null) {
 679                          // To account for dynamic padding of selection rectangles (5 units + stroke width)
 680                     int offset = 6;
 681
 682                     double scale = width < 0 || height < 0 ? 1.0 : Math.min((width - 2*offset) / content.getWidth(), (height - 2*offset) / content.getHeight());
 683
 684                     AffineTransform tr = new AffineTransform();
 685                     tr.translate(offset, offset);
 686                     tr.scale(scale, scale);
 687                             tr.translate(-content.getX(), -content.getY());
 688                             tr.getMatrix(matrix);
 689                             svgGenerator.setSVGCanvasSize(new Dimension((int)Math.ceil(scale * content.getWidth()) + 2*offset, (int)Math.ceil(scale * content.getHeight()) + 2*offset));
 690                         } else {
 691                             svgGenerator.setSVGCanvasSize(new Dimension(100, 100));
 692                         }
 693                         //svgGenerator.translate(offset, offset);
 694                         //svgGenerator.scale(scale, scale);
 695                         // translate svgGenerator to the x and y coordinates of current content
 696                         //svgGenerator.translate(-content.getX(), -content.getY());
 697
 698
 699                         //svgGenerator.setClip(content);
 700
 701                         result.append(MAIN_SECTION, "<g class=\"symbols\">");
 702                         result.append(SELECTION_SECTION, "<g class=\"selections\">");
 703                         result.append(SELECTION_MASK_SECTION, "<g class=\"selectionMasks\">");
 704
 705                         KeyVisitor keyVisitor = new KeyVisitor();
 706                         sg.accept(keyVisitor);
 707
 708                         Set<Object> keys = keyVisitor.getKeys();
 709
 710                         Map<?, ?> mappings = mappingFunction.apply(keys);
 711
 712                         IG2DNodeVisitor visitor = new PrintingVisitor(svgGenerator, result, mappings);
 713
 714                         sg.accept(visitor);
 715
 716                 } catch (Throwable t) {
 717                         LOGGER.error("Problems rendering canvas context to SVG", t);
 718                 }
 719
 720
 721                 result.append(ALL_SECTIONS, "</g>");
 722
 723                 StringBuilder res = new StringBuilder();
 724                 res.append("<svg width=\"100%\" height=\"100%\" stroke=\"black\">");
 725                 res.append("<g transform=\"matrix(").append(matrix[0]).append(",").append(matrix[1]).append(",").append(matrix[2]).append(",").append(matrix[3]).append(",").append(matrix[4]).append(",").append(matrix[5]).append(")\">");
 726                 res.append(result.get(MAIN_SECTION));
 727                 res.append(result.get(SELECTION_SECTION));
 728                 res.append(result.get(SELECTION_MASK_SECTION));
 729                 res.append("</g>");
 730                 res.append("</svg>");
 731
 732 //              System.err.println(" == FINAL RESULT == ");
 733 //              System.err.println(res.toString());
 734
 735                 return res.toString();
 736
 737         }
 738
 739
 740
 741         private static class KeyVisitor implements IG2DNodeVisitor {
 742
 743         private Set<Object> keys = new HashSet<>();
 744
 745         @Override
 746         public void enter(IG2DNode node) {
 747             if (node instanceof SingleElementNode) {
 748                 Object key = ((SingleElementNode) node).getKey();
 749                 if (key != null) {
 750                     keys.add(key);
 751                 }
 752             }
 753         }
 754
 755         @Override
 756         public void leave(IG2DNode node) {
 757             // Nothing to do
 758         }
 759
 760         public Set<Object> getKeys() {
 761             return keys;
 762         }
 763         }
 764
 765         private static class PrintingVisitor implements IG2DNodeVisitor {
 766
 767         int indent = 0;
 768
 769         HashMap<SingleElementNode,RenderSVGContext> senBuilders = new HashMap<>();
 770
 771         private RenderSVGContext result;
 772         private SVGGraphics2D svgGenerator;
 773
 774         private Map<?, ?> mappings;
 775
 776         public PrintingVisitor(SVGGraphics2D svgGenerator, RenderSVGContext result, Map<?, ?> mappings) {
 777             this.result = result;
 778             this.mappings = mappings;
 779             this.svgGenerator = svgGenerator;
 780         }
 781
 782         private String getKey(SingleElementNode node) {
 783             String key;
 784                 if(node.getKey() != null) {
 785                 if (mappings.containsKey(node.getKey()))
 786                     key = mappings.get(node.getKey()).toString();
 787                 else
 788                     key = node.getKey().toString();
 789                 } else {
 790                         key = Long.toString(node.getId());
 791                 }
 792             return key;
 793         }
 794
 795         @Override
 796         public void enter(IG2DNode node) {
 797
 798                 RenderSVGContext parentBuilder = getParentBuilder(node);
 799
 800             indent++;
 801             if(node instanceof ConnectionNode) {
 802
 803                 for(RouteGraphNode n : NodeUtil.collectNodes(node, RouteGraphNode.class)) {
 804                     n.setIgnoreSelection(true);
 805                 }
 806
 807                 String key = getKey((ConnectionNode) node);
 808                 parentBuilder.append(MAIN_SECTION, "\n<g class=\"connection\" id=\"" + key + "\">");
 809                 parentBuilder.append(SELECTION_SECTION, "\n<g style=\"visibility:hidden\" class=\"selection\" id=\"" + key + "\">");
 810                 parentBuilder.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" opacity=\"" + OPACITY + "\" id=\"" + key + "\">");
 811
 812                 Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 813                 String svg = printSVGDocument(doc);
 814                 parentBuilder.append(MAIN_SECTION, svg);
 815
 816                 for(RouteGraphNode n : NodeUtil.collectNodes(node, RouteGraphNode.class)) {
 817                     n.setIgnoreSelection(false);
 818                 }
 819
 820                 doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 821                 svg = printSVGDocument(doc);
 822                 parentBuilder.append(SELECTION_SECTION, svg);
 823
 824                 BasicStroke bs = new BasicStroke(10f);
 825
 826                 for(RouteGraphNode n : NodeUtil.collectNodes(node, RouteGraphNode.class)) {
 827                     n.setDynamicStroke(bs);
 828                 }
 829
 830                 doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 831                 svg = printSVGDocument(doc);
 832                 parentBuilder.append(SELECTION_MASK_SECTION, svg);
 833
 834                 parentBuilder.append(SELECTION_MASK_SECTION, "\n</g>");
 835                 parentBuilder.append(SELECTION_SECTION, "\n</g>");
 836                 parentBuilder.append(MAIN_SECTION, "\n</g>");
 837
 838             } else if (isSelection0(node)) {
 839
 840                 SelectionNode n = (SelectionNode)node;
 841                 SingleElementNode parentSEN = (SingleElementNode)NodeUtil.getNearestParentOfType(node, SingleElementNode.class);
 842                 if(parentSEN != null) {
 843
 844                         RenderSVGContext parentBuilder2 = getParentBuilder(parentSEN);
 845
 846                     String key = getKey(parentSEN);
 847                     n.setIgnore(false);
 848                     Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 849                     n.setIgnore(true);
 850                     String svg = printSVGDocument(doc);
 851                     parentBuilder2.append(SELECTION_SECTION, "\n<g style=\"visibility:hidden\" class=\"selection\" id=\"" + key + "\">");
 852                     parentBuilder2.append(SELECTION_SECTION, svg);
 853                     parentBuilder2.append(SELECTION_SECTION, "\n</g>");
 854                     parentBuilder2.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" id=\"" + key /*+ "\" transform=\"" + matrixString + "\"*/+ "\">");
 855                     Rectangle2D rect = n.getRect();
 856                     // NaN
 857                     if(rect.getHeight() == rect.getHeight() && rect.getWidth() == rect.getWidth()) {
 858                             parentBuilder2.append(SELECTION_MASK_SECTION,"<rect style=\"fill:#fff\" opacity=\"" + OPACITY + "\"");
 859                             parentBuilder2.append(SELECTION_MASK_SECTION," x=\"" + rect.getX() + "\" y=\"" + rect.getY() + "\"");
 860                             parentBuilder2.append(SELECTION_MASK_SECTION," width=\"" + rect.getWidth() + "\" height=\"" + rect.getHeight() + "\"");
 861                             parentBuilder2.append(SELECTION_MASK_SECTION,"></rect>");
 862                     }
 863                     parentBuilder2.append(SELECTION_MASK_SECTION,"\n</g>");
 864
 865                 }
 866             } else if (node instanceof SelectionNode) {
 867
 868                 Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 869                 String svg = printSVGDocument(doc);
 870                 parentBuilder.append(MAIN_SECTION, "<g>");
 871                 parentBuilder.append(MAIN_SECTION, svg);
 872                 parentBuilder.append(MAIN_SECTION, "\n</g>");
 873
 874             } else if (node instanceof SVGNode) {
 875                 SVGNode svg = (SVGNode)node;
 876                 AffineTransform at = svg.getTransform();
 877                 if (!at.isIdentity()) {
 878                          if(at.getScaleX() == 1.0 && at.getScaleY() == 1.0 && at.getShearX() == 0.0 && at.getShearY() == 0.0) {
 879                          String m = "translate(" + at.getTranslateX() + " " + at.getTranslateY() + ")";
 880                          parentBuilder.append(MAIN_SECTION, "\n<g transform=\"" + m + "\">");
 881                      } else {
 882                          double[] ds = new double[6];
 883                          at.getMatrix(ds);
 884                          String m = "matrix(" + ds[0] + " " + ds[1] + " " + ds[2] + " " + ds[3] + " " + ds[4] + " " + ds[5] + ")";
 885                          parentBuilder.append(MAIN_SECTION, "\n<g transform=\"" + m + "\">");
 886                      }
 887                 }
 888                 parentBuilder.append(MAIN_SECTION, svg.getSVGText());
 889                 if (!at.isIdentity()) {
 890                         parentBuilder.append(MAIN_SECTION, "\n</g>");
 891                 }
 892             } else if (node instanceof G2DParentNode) {
 893                 AffineTransform at = node.getTransform();
 894                 if(node instanceof SingleElementNode) {
 895                     SingleElementNode sen = (SingleElementNode)node;
 896                     String key = getKey(sen);
 897                     String typeClass = sen.getTypeClass();
 898                     String clazz = "definedElement";
 899                     if(typeClass != null && !typeClass.isEmpty())
 900                         clazz = clazz + " " + typeClass;
 901
 902                     parentBuilder.append(MAIN_SECTION, "\n<g class=\""+clazz+"\" id=\"" + key + "\">");
 903                     senBuilders.put(sen, new RenderSVGContext());
 904                 }
 905                 if(!at.isIdentity()) {
 906                     if(at.getScaleX() == 1.0 && at.getScaleY() == 1.0 && at.getShearX() == 0.0 && at.getShearY() == 0.0) {
 907                         String m = "translate(" + at.getTranslateX() + " " + at.getTranslateY() + ")";
 908                         parentBuilder.append(ALL_SECTIONS, "\n<g transform=\"" + m + "\">");
 909                     } else {
 910                         double[] ds = new double[6];
 911                         at.getMatrix(ds);
 912                         String m = "matrix(" + ds[0] + " " + ds[1] + " " + ds[2] + " " + ds[3] + " " + ds[4] + " " + ds[5] + ")";
 913                         parentBuilder.append(ALL_SECTIONS, "\n<g transform=\"" + m + "\">");
 914                     }
 915                 }
 916             } else if (!(node instanceof RouteGraphNode) && !(node instanceof LinkNode)){
 917                 try {
 918                         Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 919                         if (doc.getElementsByTagName("g").getLength() == 0)
 920                                 return;
 921                         String svg = printSVGDocument(doc);
 922                         parentBuilder.append(MAIN_SECTION, "<g>");
 923                         parentBuilder.append(MAIN_SECTION, svg);
 924                         parentBuilder.append(MAIN_SECTION, "\n</g>");
 925                 } catch (Exception e) {
 926                         // TODO: There are nodes that do not behave well when rendered to SVG. For backwards compatibility, we don't handle the exceptions.
 927                 }
 928             }
 929
 930             //enters.put(node, b.length());
 931
 932         }
 933
 934         private boolean isSelection0(IG2DNode node) {
 935
 936             if(node instanceof SelectionNode) {
 937                 SelectionNode sn = (SelectionNode)node;
 938                 return sn.getSelectionId() == 0;
 939             } else {
 940                 return false;
 941             }
 942
 943         }
 944
 945         private RenderSVGContext getParentBuilder(IG2DNode node) {
 946
 947             INode parentSEN = NodeUtil.getNearestParentOfType(node, SingleElementNode.class);
 948             if(parentSEN instanceof G2DSceneGraph) return result;
 949
 950             RenderSVGContext parentBuilder = senBuilders.get(parentSEN);
 951             if(parentBuilder == null) return result;
 952
 953             return parentBuilder;
 954
 955         }
 956
 957         @Override
 958         public void leave(IG2DNode node) {
 959
 960             if(node instanceof ConnectionNode || node instanceof SVGNode) {
 961                 // We are done
 962             } else if (node instanceof G2DParentNode) {
 963
 964                 RenderSVGContext parentBuilder = getParentBuilder(node);
 965
 966                 if(node instanceof SingleElementNode) {
 967                         SingleElementNode sen = (SingleElementNode)node;
 968                         RenderSVGContext b = senBuilders.get(sen);
 969                         String content = b.get(MAIN_SECTION);
 970                         if(content.isEmpty()) {
 971                                 if(sen.getKey() != null) {
 972
 973                                         for(SelectionNode n : NodeUtil.collectNodes(node, SelectionNode.class)) {
 974                                                 n.setIgnore(true);
 975                                         }
 976
 977                                         Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
 978                                         String svg = printSVGDocument(doc);
 979                                         parentBuilder.append(MAIN_SECTION, svg);
 980                                 }
 981                         } else {
 982                                 parentBuilder.append(b);
 983                         }
 984                 }
 985
 986                 AffineTransform at = node.getTransform();
 987                 if(!at.isIdentity()) {
 988                     parentBuilder.append(ALL_SECTIONS, "</g>");
 989                 }
 990                 if(node instanceof SingleElementNode) {
 991                     SingleElementNode sen = (SingleElementNode)node;
 992                     //if(sen.getKey() != null) {
 993                         parentBuilder.append(MAIN_SECTION, "</g>");
 994                     //}
 995                 }
 996             }
 997             indent --;
 998         }
 999         }
1000 }