]> gerrit.simantics Code Review - simantics/platform.git/blobdiff - bundles/org.simantics.modeling/src/org/simantics/modeling/SCLScenegraph.java
Fix SCL SceneGraph is omitting graphical elements
[simantics/platform.git] / bundles / org.simantics.modeling / src / org / simantics / modeling / SCLScenegraph.java
index 33d7f06290e109e69fdc4ceff7afb00c8b7cd00a..40a5265852fa79083df1781db24a563df95d4532 100644 (file)
@@ -1,15 +1,52 @@
 package org.simantics.modeling;
 
+import java.awt.BasicStroke;
+import java.awt.Color;
+import java.awt.Dimension;
+import java.awt.RenderingHints;
+import java.awt.RenderingHints.Key;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.Rectangle2D;
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStreamWriter;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Random;
 import java.util.Set;
+import java.util.UUID;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 
+import javax.xml.transform.OutputKeys;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.dom.DOMSource;
+import javax.xml.transform.stream.StreamResult;
+
+import org.apache.batik.dom.GenericDOMImplementation;
+import org.apache.batik.svggen.SVGGeneratorContext;
+import org.apache.batik.svggen.SVGGraphics2D;
+import org.simantics.Simantics;
+import org.simantics.datatypes.literal.GUID;
+import org.simantics.db.ReadGraph;
 import org.simantics.db.Resource;
+import org.simantics.db.common.request.IndexRoot;
+import org.simantics.db.common.request.ResourceRead;
+import org.simantics.db.common.request.UnaryRead;
 import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.exception.RuntimeDatabaseException;
+import org.simantics.db.layer0.variable.Variables;
+import org.simantics.diagram.elements.DecorationSVGNode;
 import org.simantics.diagram.elements.DiagramNodeUtil;
 import org.simantics.diagram.elements.TextGridNode;
 import org.simantics.diagram.elements.TextNode;
+import org.simantics.diagram.stubs.DiagramResource;
+import org.simantics.g2d.canvas.Hints;
 import org.simantics.g2d.canvas.ICanvasContext;
 import org.simantics.g2d.diagram.DiagramHints;
 import org.simantics.g2d.diagram.IDiagram;
@@ -18,39 +55,96 @@ import org.simantics.g2d.diagram.participant.Selection;
 import org.simantics.g2d.element.IElement;
 import org.simantics.g2d.scenegraph.ICanvasSceneGraphProvider;
 import org.simantics.g2d.utils.CanvasUtils;
+import org.simantics.layer0.Layer0;
+import org.simantics.scenegraph.INode;
 import org.simantics.scenegraph.ParentNode;
 import org.simantics.scenegraph.g2d.G2DParentNode;
+import org.simantics.scenegraph.g2d.G2DRenderingHints;
 import org.simantics.scenegraph.g2d.G2DSceneGraph;
+import org.simantics.scenegraph.g2d.IG2DNode;
+import org.simantics.scenegraph.g2d.IG2DNodeVisitor;
 import org.simantics.scenegraph.g2d.events.command.Commands;
 import org.simantics.scenegraph.g2d.nodes.BackgroundNode;
 import org.simantics.scenegraph.g2d.nodes.BoundsNode;
 import org.simantics.scenegraph.g2d.nodes.ConnectionNode;
 import org.simantics.scenegraph.g2d.nodes.DataNode;
-import org.simantics.scenegraph.g2d.nodes.DecorationSVGNode;
+import org.simantics.scenegraph.g2d.nodes.LinkNode;
 import org.simantics.scenegraph.g2d.nodes.NavigationNode;
+import org.simantics.scenegraph.g2d.nodes.SVGNode;
+import org.simantics.scenegraph.g2d.nodes.SelectionNode;
 import org.simantics.scenegraph.g2d.nodes.SingleElementNode;
+import org.simantics.scenegraph.g2d.nodes.connection.RouteGraphNode;
+import org.simantics.scenegraph.g2d.nodes.spatial.RTreeNode;
 import org.simantics.scenegraph.utils.NodeUtil;
+import org.simantics.scl.runtime.function.Function1;
+import org.simantics.scl.runtime.tuple.Tuple2;
 import org.simantics.trend.impl.ItemNode;
 import org.simantics.utils.threads.ThreadUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.w3c.dom.DOMImplementation;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
 
 public class SCLScenegraph {
+
+       private static final Logger LOGGER = LoggerFactory.getLogger(SCLScenegraph.class);
        
+       private static final String MAIN_SECTION = "main";
+       private static final String SELECTION_SECTION = "selection";
+       private static final String SELECTION_MASK_SECTION = "selectionMask";
+
+       private static final String[] ALL_SECTIONS = { MAIN_SECTION, SELECTION_SECTION, SELECTION_MASK_SECTION };
+
+       // Changed from 0.001 to 0.0001 to prevent creation of huge BufferedImage's when
+       // generating PDF from SVG. If SVG contains any transparency then Batik uses
+       // bitmap-rendering which remarkably slows things down
+       // See org.apache.batik.gvt.AbstractGraphicsNode.paint(Graphics2D) where decisions are made
+       // if AlphaComposite should be painted 
+       private static final String OPACITY = "0.0001";
+
+       @Deprecated
        public static ICanvasSceneGraphProvider getICanvasSceneGraphProvider(Resource model, Resource diagram, String diagramRVI) throws DatabaseException, InterruptedException {
                ICanvasSceneGraphProvider provider = DiagramNodeUtil.loadSceneGraphProvider(model, diagram, diagramRVI);
                return provider;
        }
        
+       @Deprecated
        public static void disposeSceneGraphProvider(ICanvasSceneGraphProvider provider) {
                provider.dispose();
        }
-       
-       //public static Resource getDiagramRuntime(Resource ) 
-       
-       
-//     public static String getNodeTransform(ICanvasContext ctx, String name) throws DatabaseException, InterruptedException {
-//             return getNodeTransform(ctx, name);
-//     }
-       
+
+    public static <T> T doWithICanvasSceneGraphProvider(Resource diagram, Function1<ICanvasSceneGraphProvider, T> func) throws DatabaseException {
+        return doWithICanvasSceneGraphProvider(diagram, (Function<ICanvasSceneGraphProvider, T>) provider -> func.apply(provider));
+    }
+
+    public static <T> T doWithICanvasSceneGraphProvider(Resource diagram, Function<ICanvasSceneGraphProvider, T> func) throws DatabaseException {
+        Tuple2 result = Simantics.getSession().syncRequest(new ResourceRead<Tuple2>(diagram) {
+
+            @Override
+            public Tuple2 perform(ReadGraph graph) throws DatabaseException {
+                Resource indexRoot = graph.syncRequest(new IndexRoot(resource));
+                String diagramRVI = Variables.getRVI(graph, resource);
+                return new Tuple2(indexRoot, diagramRVI);
+            }
+        });
+        ICanvasSceneGraphProvider provider = DiagramNodeUtil.loadSceneGraphProvider((Resource) result.c0, diagram, (String) result.c1);
+        try {
+            return func.apply(provider);
+        } finally {
+            provider.dispose();
+        }
+    }
+
+    public static <T> T doWithCanvasContext(Resource diagram, Function1<ICanvasContext, T> func) throws DatabaseException {
+        return doWithCanvasContext(diagram, (Function<ICanvasContext, T>) canvasContext -> func.apply(canvasContext));
+    }
+
+    public static <T> T doWithCanvasContext(Resource diagram, Function<ICanvasContext, T> func) throws DatabaseException {
+        return doWithICanvasSceneGraphProvider(diagram, (Function<ICanvasSceneGraphProvider, T>) provider -> func.apply(provider.getCanvasContext()));
+    }
+
        public static String getNodeTransform(ICanvasContext ctx, String name) {
                
                Set<TextNode> texts = NodeUtil.collectNodes(ctx.getSceneGraph(), TextNode.class);
@@ -192,6 +286,23 @@ public class SCLScenegraph {
        }
         return "No nodes in scenegraph!";
     }
+    
+    /**
+     * Returns background color of a canvasContext or null.
+     * @param ctx
+     * @return color in RGBA List<Integer> format, or null.
+     */
+    public static List<Integer> getBackgroundColor(ICanvasContext ctx) {
+       Color color = ctx.getDefaultHintContext().getHint(Hints.KEY_BACKGROUND_COLOR);
+       if (color == null)
+               return null;
+       ArrayList<Integer> rgba = new ArrayList<>(4);
+       rgba.add(color.getRed());
+       rgba.add(color.getGreen());
+       rgba.add(color.getBlue());
+       rgba.add(color.getAlpha());
+       return rgba;
+    }
 
     public static String sceneGraphTest (ICanvasContext ctx, String module, String value) {
        
@@ -234,7 +345,7 @@ public class SCLScenegraph {
         }
     }
     
-     public static boolean copyPaste (final ICanvasContext source_ctx, final ICanvasContext target_ctx, List<Resource> modules) throws DatabaseException {
+    public static boolean copyPaste (final ICanvasContext source_ctx, final ICanvasContext target_ctx, List<Resource> modules) throws DatabaseException {
        
        IDiagram idiagram = source_ctx.getDefaultHintContext().getHint(DiagramHints.KEY_DIAGRAM);
 
@@ -286,5 +397,604 @@ public class SCLScenegraph {
                return true;
     }
 
+       static class Generator extends SVGGraphics2D {
+
+               int elemLevel = 0;
+               String newElementId = null;
+               ArrayList<Element> elements = new ArrayList<Element>();
+
+               public static final String svgNS = "http://www.w3.org/2000/svg";
+
+               public Generator(SVGGeneratorContext ctx, boolean textAsShapes) {
+                       super(ctx, textAsShapes);
+               }
+
+               public Generator(Document document) {
+                       super(document);
+                       // prevent batik comment in each g-element
+                       getGeneratorContext().setComment(null);
+               }
+
+               @Override
+               public Element getRoot() {
+                       Element root = super.getRoot();
+                       for(Element e : elements) {
+                               root.appendChild(e);
+                       }
+                       return root;
+               }
+
+               @Override
+               public void setRenderingHint(Key arg0, Object arg1) {
+                       if(G2DRenderingHints.KEY_BEGIN_ELEMENT == arg0) {
+                               elemLevel++;
+                       }
+                       if(G2DRenderingHints.KEY_ELEMENT_ID == arg0) {
+                               if(arg1 != null)
+                                       newElementId = arg1.toString();
+                               else
+                                       newElementId = UUID.randomUUID().toString();
+                       }
+                       if(G2DRenderingHints.KEY_END_ELEMENT == arg0) {
+                               elemLevel--;
+                               if(elemLevel == 0) {
+                                       Element group = getDOMFactory().createElement(SVG_G_TAG);
+                                       //Element group = getDOMFactory().createElementNS(SVG_NAMESPACE_URI, SVG_G_TAG);
+                                       group.setAttributeNS(null, "id", newElementId);
+                                       group.setAttributeNS(null, "class", arg1.toString());
+                                       getRoot(group);
+                                       elements.add(group);
+                               }
+                       }
+                       super.setRenderingHint(arg0, arg1);
+               }
+
+       }
+
+       public static Element renderSVGNode(SVGGraphics2D svgGenerator, IG2DNode node) {
+
+               try {
+
+                       svgGenerator.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+                       svgGenerator.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+                       svgGenerator.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
+
+                       node.render(svgGenerator);
+
+               } catch (Throwable t) {
+                       LOGGER.error("Problems rendering scene graph to SVG", t);
+               }
+
+               return svgGenerator.getRoot();
+       }
+
+       public static String printSVGDocument(Element doce) {
+
+               StringBuilder result = new StringBuilder();
+
+               NodeList nl =  doce.getChildNodes();
+
+               for(int i=0;i<nl.getLength();i++) {
+
+                       ByteArrayOutputStream os = new ByteArrayOutputStream();
+
+                       try {
+
+                               TransformerFactory tf = TransformerFactory.newInstance();
+                               Transformer transformer = tf.newTransformer();
+                               transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
+                               transformer.setOutputProperty(OutputKeys.STANDALONE, "no");
+                               transformer.setOutputProperty(OutputKeys.METHOD, "xml");
+                               transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+                               transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
+                               transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
+
+                               transformer.transform(new DOMSource(nl.item(i)), 
+                                               new StreamResult(new OutputStreamWriter(os, "UTF-8")));
+
+                               os.flush();
+                               os.close();
+
+                       } catch (Throwable t) {
+                               LOGGER.error("Problems formatting SVGDocument to text.", t);
+                       }
+
+                       result.append(new String(os.toByteArray()));
+
+               }
+
+               return result.toString();
+
+       }
+
+       public static String renderSVG3(ICanvasContext ctx) {
+               return renderSVG3(ctx, -1, -1);
+       }
+
+       public static String renderSVG3(ICanvasContext ctx, double width, double height) {
+        return renderSVG0(width, height, ctx, p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2)));
+       }
+
+    /**
+     * @param graph
+     * @param component
+     * @throws DatabaseException
+     */
+    private static Object[] createURIBasedL0Identifier(ReadGraph graph, Resource component) throws DatabaseException {
+        String uri = graph.getPossibleURI(component);
+        int hashCode = uri.hashCode();
+        Random random = new Random(hashCode);
+        long l1 = random.nextLong();
+        long l2 = random.nextLong();
+        return new Object[] { l1, l2 };
+    }
+
+    /**
+     * Default no-op mapper
+     */
+    private static final Function1<Set<?>, Map<?, ?>> mapper = p0 -> p0.stream().collect(Collectors.toMap(p1 -> p1, p2 -> p2));
+
+    public static String renderSVG(ICanvasContext ctx, double width, double height) {
+        return renderSVG0(width, height, ctx, mapper);
+    }
+
+    public static String renderSVG(ICanvasContext ctx) {
+       return renderSVG(ctx, -1, -1);
+    }
+
+    public static String renderSVGMapIdentifiers(ICanvasContext ctx) {
+               return renderSVGMapIdentifiers(ctx, -1, -1);
+    }
+    
+    /**
+     * Renders ICanvasContext into SVG by mapping the SVG id's into URI based
+     * GUID's
+     * 
+     * @param ctx
+     * @return
+     */
+    public static String renderSVGMapIdentifiers(ICanvasContext ctx, double width, double height) {
+        return renderSVG0(width, height, ctx, new Function1<Set<?>, Map<?, ?>>() {
+
+            @Override
+            public Map<?, ?> apply(Set<?> p0) {
+                try {
+                    return Simantics.getSession().syncRequest(new UnaryRead<Set<?>, Map<?, ?>>(p0) {
+
+                        @Override
+                        public Map<?, ?> perform(ReadGraph graph) throws DatabaseException {
+                            ModelingResources MOD = ModelingResources.getInstance(graph);
+                            DiagramResource DIA = DiagramResource.getInstance(graph);
+                            Layer0 L0 = Layer0.getInstance(graph);
+                            return parameter.stream().collect(Collectors.toMap(p -> p, p -> {
+                                try {
+                                    if (p instanceof Resource) {
+                                        Resource element = (Resource) p;
+                                        if (graph.isInstanceOf(element, DIA.Element)) {
+                                            Resource component = graph.getPossibleObject(element, MOD.ElementToComponent);
+                                            if (component != null) {
+                                                GUID identifier = graph.getPossibleRelatedValue(component, L0.identifier, GUID.BINDING);
+                                                if (identifier != null) {
+                                                    return Arrays.toString(createURIBasedL0Identifier(graph, component));
+                                                } else {
+                                                    LOGGER.error("Component {} does not have GUID identifier!", component);
+                                                }
+                                            } else if (graph.isInstanceOf(element, DIA.Connection) || graph.isInstanceOf(element, DIA.Terminal)) {
+                                                // Ok, lets create a hashcode for connections and terminals as they do not have identifiers 
+                                                return graph.getURI(element).hashCode();
+                                            } else {
+                                                // Ok, lets create a hashcode or either return empty string in cases where no ID is required
+                                                if (graph.hasStatement(element, L0.HasName))
+                                                    return graph.getURI(element).hashCode();
+                                                return "";
+                                            }
+                                        }
+                                    } else {
+                                        LOGGER.error("Parameter p {} is not resource but it is {}", p, p.getClass());
+                                    }
+                                    return p;
+                                } catch (DatabaseException e) {
+                                    throw new RuntimeDatabaseException(e);
+                                }
+                            }));
+                        }
+                    });
+                } catch (DatabaseException e) {
+                    LOGGER.error("Could not apply mappings", e);
+                    throw new RuntimeDatabaseException(e);
+                }
+            }
+        });
+       }
+       
+    static class RenderSVGContext {
+       
+       Map<String,StringBuilder> documents = new HashMap<>();
+       
+       public void append(String[] keys, String svgText) {
+               for(String key : keys) append(key, svgText);
+       }
+
+       public void append(String key, String svgText) {
+               StringBuilder builder = documents.get(key);
+               if(builder == null) {
+                       builder = new StringBuilder();
+                       documents.put(key, builder);
+               }
+               builder.append(svgText);
+       }
+       
+       public void append(RenderSVGContext other) {
+               for(String key : other.documents.keySet()) {
+                       append(key, other.get(key));
+               }
+       }
+       
+       public String get(String key) {
+               StringBuilder builder = documents.get(key);
+               if(builder == null) return "";
+               else return builder.toString();
+       }
+       
+    }
+    
+       private static String renderSVG0(double width, double height, ICanvasContext ctx, Function1<Set<?>, Map<?, ?>> mappingFunction) {
+
+               // Get a DOMImplementation.
+               DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
+
+               // Create an instance of org.w3c.dom.Document.
+               String svgNS = "http://www.w3.org/2000/svg";
+               Document document = domImpl.createDocument(svgNS, "svg", null);
+
+               // Create an instance of the SVG Generator.
+               SVGGraphics2D svgGenerator = new Generator(document);
+
+               RenderSVGContext result = new RenderSVGContext();
+
+               double[] matrix = new double[6];
+               try {
+
+            Selection selection = ctx.getAtMostOneItemOfClass(Selection.class);
+            if (selection != null) {
+                // This prevents workbench selection from being left over.
+                // Also prevents scene graph crap from being left on the screen.
+               IDiagram d = ctx.getDefaultHintContext().getHint(DiagramHints.KEY_DIAGRAM);
+                selection.setSelection(0, d.getElements());
+            }
+
+                       G2DSceneGraph sg = ctx.getSceneGraph();
+                       sg.performCleanup();
+                       G2DParentNode root = (G2DParentNode) sg.getRootNode();
+
+                       // rtree is the actual content of the diagram
+                       RTreeNode rtree = NodeUtil.getNearestChildByClass(root, RTreeNode.class);
+                       Rectangle2D rtreeBounds = NodeUtil.getLocalBounds(rtree);
+
+                       // get the bounds of the content
+                       Rectangle2D content = rtreeBounds;
+                       
+                       
+                       if (content != null) {
+                        // To account for dynamic padding of selection rectangles (5 units + stroke width)
+                   int offset = 6;
+                   
+                   double scale = width < 0 || height < 0 ? 1.0 : Math.min((width - 2*offset) / content.getWidth(), (height - 2*offset) / content.getHeight());
+               
+                   AffineTransform tr = new AffineTransform();
+                   tr.translate(offset, offset);
+                   tr.scale(scale, scale);
+                           tr.translate(-content.getX(), -content.getY());
+                           tr.getMatrix(matrix);
+                           svgGenerator.setSVGCanvasSize(new Dimension((int)Math.ceil(scale * content.getWidth()) + 2*offset, (int)Math.ceil(scale * content.getHeight()) + 2*offset));
+                       } else {
+                           svgGenerator.setSVGCanvasSize(new Dimension(100, 100));
+                       }
+                       //svgGenerator.translate(offset, offset);
+                       //svgGenerator.scale(scale, scale);
+                       // translate svgGenerator to the x and y coordinates of current content
+                       //svgGenerator.translate(-content.getX(), -content.getY());
+
+                       
+                       //svgGenerator.setClip(content);
+                       
+                       result.append(MAIN_SECTION, "<g class=\"symbols\">");
+                       result.append(SELECTION_SECTION, "<g class=\"selections\">");
+                       result.append(SELECTION_MASK_SECTION, "<g class=\"selectionMasks\">");
+
+                       KeyVisitor keyVisitor = new KeyVisitor();
+                       sg.accept(keyVisitor);
+                       
+                       Set<Object> keys = keyVisitor.getKeys();
+                       
+                       Map<?, ?> mappings = mappingFunction.apply(keys);
+
+                       IG2DNodeVisitor visitor = new PrintingVisitor(svgGenerator, result, mappings);
+                       
+                       sg.accept(visitor);
+
+               } catch (Throwable t) {
+                       LOGGER.error("Problems rendering canvas context to SVG", t);
+               }
+
+
+               result.append(ALL_SECTIONS, "</g>");
+
+               StringBuilder res = new StringBuilder();
+               res.append("<svg width=\"100%\" height=\"100%\" stroke=\"black\">");
+               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(")\">");
+               res.append(result.get(MAIN_SECTION));
+               res.append(result.get(SELECTION_SECTION));
+               res.append(result.get(SELECTION_MASK_SECTION));
+               res.append("</g>");
+               res.append("</svg>");
+
+//             System.err.println(" == FINAL RESULT == ");
+//             System.err.println(res.toString());
+               
+               return res.toString();
+               
+       }
+       
+       
+       
+       private static class KeyVisitor implements IG2DNodeVisitor {
 
+        private Set<Object> keys = new HashSet<>();
+
+        @Override
+        public void enter(IG2DNode node) {
+            if (node instanceof SingleElementNode) {
+                Object key = ((SingleElementNode) node).getKey();
+                if (key != null) {
+                    keys.add(key);
+                }
+            }
+        }
+
+        @Override
+        public void leave(IG2DNode node) {
+            // Nothing to do
+        }
+
+        public Set<Object> getKeys() {
+            return keys;
+        }
+       }
+
+       private static class PrintingVisitor implements IG2DNodeVisitor {
+
+        int indent = 0;
+
+        HashMap<SingleElementNode,RenderSVGContext> senBuilders = new HashMap<>();
+
+        private RenderSVGContext result;
+        private SVGGraphics2D svgGenerator;
+
+        private Map<?, ?> mappings;
+
+        public PrintingVisitor(SVGGraphics2D svgGenerator, RenderSVGContext result, Map<?, ?> mappings) {
+            this.result = result;
+            this.mappings = mappings;
+            this.svgGenerator = svgGenerator;
+        }
+
+        private String getKey(SingleElementNode node) {
+            String key;
+               if(node.getKey() != null) {
+                if (mappings.containsKey(node.getKey()))
+                    key = mappings.get(node.getKey()).toString();
+                else
+                    key = node.getKey().toString();
+               } else {
+                       key = Long.toString(node.getId());
+               }
+            return key;
+        }
+
+        @Override
+        public void enter(IG2DNode node) {
+            
+               RenderSVGContext parentBuilder = getParentBuilder(node);
+            
+            indent++;
+            if(node instanceof ConnectionNode) {
+                
+                for(RouteGraphNode n : NodeUtil.collectNodes(node, RouteGraphNode.class)) {
+                    n.setIgnoreSelection(true);
+                }
+
+                String key = getKey((ConnectionNode) node);
+                parentBuilder.append(MAIN_SECTION, "\n<g class=\"connection\" id=\"" + key + "\">");
+                parentBuilder.append(SELECTION_SECTION, "\n<g style=\"visibility:hidden\" class=\"selection\" id=\"" + key + "\">");
+                parentBuilder.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" opacity=\"" + OPACITY + "\" id=\"" + key + "\">");
+                
+                Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                String svg = printSVGDocument(doc);
+                parentBuilder.append(MAIN_SECTION, svg);
+
+                for(RouteGraphNode n : NodeUtil.collectNodes(node, RouteGraphNode.class)) {
+                    n.setIgnoreSelection(false);
+                }
+
+                doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                svg = printSVGDocument(doc);
+                parentBuilder.append(SELECTION_SECTION, svg);
+
+                BasicStroke bs = new BasicStroke(10f);
+                
+                for(RouteGraphNode n : NodeUtil.collectNodes(node, RouteGraphNode.class)) {
+                    n.setDynamicStroke(bs);
+                }
+
+                doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                svg = printSVGDocument(doc);
+                parentBuilder.append(SELECTION_MASK_SECTION, svg);
+
+                parentBuilder.append(SELECTION_MASK_SECTION, "\n</g>");
+                parentBuilder.append(SELECTION_SECTION, "\n</g>");
+                parentBuilder.append(MAIN_SECTION, "\n</g>");
+                
+            } else if (isSelection0(node)) {
+                
+                SelectionNode n = (SelectionNode)node;
+                SingleElementNode parentSEN = (SingleElementNode)NodeUtil.getNearestParentOfType(node, SingleElementNode.class);
+                if(parentSEN != null) {
+                    
+                       RenderSVGContext parentBuilder2 = getParentBuilder(parentSEN);
+                    
+                    String key = getKey(parentSEN);
+                    n.setIgnore(false);
+                    Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                    n.setIgnore(true);
+                    String svg = printSVGDocument(doc);
+                    parentBuilder2.append(SELECTION_SECTION, "\n<g style=\"visibility:hidden\" class=\"selection\" id=\"" + key + "\">");
+                    parentBuilder2.append(SELECTION_SECTION, svg);
+                    parentBuilder2.append(SELECTION_SECTION, "\n</g>");
+                    parentBuilder2.append(SELECTION_MASK_SECTION, "\n<g class=\"selectionMask\" id=\"" + key /*+ "\" transform=\"" + matrixString + "\"*/+ "\">");
+                    Rectangle2D rect = n.getRect();
+                    // NaN
+                    if(rect.getHeight() == rect.getHeight() && rect.getWidth() == rect.getWidth()) {
+                           parentBuilder2.append(SELECTION_MASK_SECTION,"<rect style=\"fill:#fff\" opacity=\"" + OPACITY + "\"");
+                           parentBuilder2.append(SELECTION_MASK_SECTION," x=\"" + rect.getX() + "\" y=\"" + rect.getY() + "\"");
+                           parentBuilder2.append(SELECTION_MASK_SECTION," width=\"" + rect.getWidth() + "\" height=\"" + rect.getHeight() + "\"");
+                           parentBuilder2.append(SELECTION_MASK_SECTION,"></rect>");
+                    }
+                    parentBuilder2.append(SELECTION_MASK_SECTION,"\n</g>");
+                   
+                }
+            } else if (node instanceof SelectionNode) {
+
+                Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                String svg = printSVGDocument(doc);
+                parentBuilder.append(MAIN_SECTION, "<g>");
+                parentBuilder.append(MAIN_SECTION, svg);
+                parentBuilder.append(MAIN_SECTION, "\n</g>");
+
+            } else if (node instanceof SVGNode) {
+                SVGNode svg = (SVGNode)node;
+                AffineTransform at = svg.getTransform();
+                if (!at.isIdentity()) {
+                        if(at.getScaleX() == 1.0 && at.getScaleY() == 1.0 && at.getShearX() == 0.0 && at.getShearY() == 0.0) {
+                         String m = "translate(" + at.getTranslateX() + " " + at.getTranslateY() + ")";
+                         parentBuilder.append(MAIN_SECTION, "\n<g transform=\"" + m + "\">");
+                     } else {
+                         double[] ds = new double[6];
+                         at.getMatrix(ds);
+                         String m = "matrix(" + ds[0] + " " + ds[1] + " " + ds[2] + " " + ds[3] + " " + ds[4] + " " + ds[5] + ")";
+                         parentBuilder.append(MAIN_SECTION, "\n<g transform=\"" + m + "\">");
+                     }
+                }
+                parentBuilder.append(MAIN_SECTION, svg.getSVGText());
+                if (!at.isIdentity()) {
+                       parentBuilder.append(MAIN_SECTION, "\n</g>");
+                }
+            } else if (node instanceof G2DParentNode) {
+                AffineTransform at = node.getTransform();
+                if(node instanceof SingleElementNode) {
+                    SingleElementNode sen = (SingleElementNode)node;
+                    String key = getKey(sen);
+                    String typeClass = sen.getTypeClass();
+                    String clazz = "definedElement";
+                    if(typeClass != null && !typeClass.isEmpty())
+                       clazz = clazz + " " + typeClass;
+
+                    parentBuilder.append(MAIN_SECTION, "\n<g class=\""+clazz+"\" id=\"" + key + "\">");
+                    senBuilders.put(sen, new RenderSVGContext());
+                }
+                if(!at.isIdentity()) {
+                    if(at.getScaleX() == 1.0 && at.getScaleY() == 1.0 && at.getShearX() == 0.0 && at.getShearY() == 0.0) {
+                        String m = "translate(" + at.getTranslateX() + " " + at.getTranslateY() + ")";
+                        parentBuilder.append(ALL_SECTIONS, "\n<g transform=\"" + m + "\">");
+                    } else {
+                        double[] ds = new double[6];
+                        at.getMatrix(ds);
+                        String m = "matrix(" + ds[0] + " " + ds[1] + " " + ds[2] + " " + ds[3] + " " + ds[4] + " " + ds[5] + ")";
+                        parentBuilder.append(ALL_SECTIONS, "\n<g transform=\"" + m + "\">");
+                    }
+                }
+            } else if (!(node instanceof RouteGraphNode) && !(node instanceof LinkNode)){
+               try {
+                       Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                       if (doc.getElementsByTagName("g").getLength() == 0)
+                               return;
+                       String svg = printSVGDocument(doc);
+                       parentBuilder.append(MAIN_SECTION, "<g>");
+                       parentBuilder.append(MAIN_SECTION, svg);
+                       parentBuilder.append(MAIN_SECTION, "\n</g>");
+               } catch (Exception e) {
+                       // TODO: There are nodes that do not behave well when rendered to SVG. For backwards compatibility, we don't handle the exceptions.
+               }
+            }
+
+            //enters.put(node, b.length());
+
+        }
+        
+        private boolean isSelection0(IG2DNode node) {
+            
+            if(node instanceof SelectionNode) {
+                SelectionNode sn = (SelectionNode)node;
+                return sn.getSelectionId() == 0;
+            } else {
+                return false;
+            }
+            
+        }
+        
+        private RenderSVGContext getParentBuilder(IG2DNode node) {
+            
+            INode parentSEN = NodeUtil.getNearestParentOfType(node, SingleElementNode.class);
+            if(parentSEN instanceof G2DSceneGraph) return result;
+
+            RenderSVGContext parentBuilder = senBuilders.get(parentSEN);
+            if(parentBuilder == null) return result;
+            
+            return parentBuilder;
+            
+        }
+
+        @Override
+        public void leave(IG2DNode node) {
+
+            if(node instanceof ConnectionNode || node instanceof SVGNode) {
+                // We are done
+            } else if (node instanceof G2DParentNode) {
+                
+               RenderSVGContext parentBuilder = getParentBuilder(node);
+                
+                if(node instanceof SingleElementNode) {
+                       SingleElementNode sen = (SingleElementNode)node;
+                       RenderSVGContext b = senBuilders.get(sen);
+                       String content = b.get(MAIN_SECTION);
+                       if(content.isEmpty()) {
+                               if(sen.getKey() != null) {
+
+                                       for(SelectionNode n : NodeUtil.collectNodes(node, SelectionNode.class)) {
+                                               n.setIgnore(true);
+                                       }
+
+                                       Element doc = renderSVGNode(svgGenerator, (IG2DNode)node);
+                                       String svg = printSVGDocument(doc);
+                                       parentBuilder.append(MAIN_SECTION, svg);
+                               }
+                       } else {
+                               parentBuilder.append(b);
+                       }
+                }
+                
+                AffineTransform at = node.getTransform();
+                if(!at.isIdentity()) {
+                    parentBuilder.append(ALL_SECTIONS, "</g>");
+                }
+                if(node instanceof SingleElementNode) {
+                    SingleElementNode sen = (SingleElementNode)node;
+                    //if(sen.getKey() != null) {
+                        parentBuilder.append(MAIN_SECTION, "</g>");
+                    //}
+                }
+            }
+            indent --;
+        }
+       }
 }
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