bundles/org.simantics.diagram/src/org/simantics/diagram/adapter/ScenegraphCompositePasteHandler.java

   1 package org.simantics.diagram.adapter;
   2
   3 import java.util.Collection;
   4 import java.util.Set;
   5
   6 import org.eclipse.core.runtime.IStatus;
   7 import org.eclipse.core.runtime.Status;
   8 import org.simantics.db.ReadGraph;
   9 import org.simantics.db.Resource;
  10 import org.simantics.db.WriteGraph;
  11 import org.simantics.db.common.CommentMetadata;
  12 import org.simantics.db.common.request.UniqueRead;
  13 import org.simantics.db.common.utils.ListUtils;
  14 import org.simantics.db.exception.DatabaseException;
  15 import org.simantics.db.layer0.adapter.impl.DefaultPasteHandler;
  16 import org.simantics.db.layer0.util.SimanticsClipboard.Representation;
  17 import org.simantics.diagram.internal.Activator;
  18 import org.simantics.graph.db.IImportAdvisor2;
  19 import org.simantics.layer0.Layer0;
  20 import org.simantics.scenegraph.ontology.ScenegraphResources;
  21
  22 /**
  23  * @author Teemu M&auml;t&auml;sniemi
  24  * @author Tuukka Lehtonen
  25  */
  26 public class ScenegraphCompositePasteHandler extends DefaultPasteHandler {
  27
  28         int copied;
  29
  30         public ScenegraphCompositePasteHandler(Resource resource) {
  31                 super(resource);
  32         }
  33
  34         @Override
  35         public void onPasteBegin(WriteGraph graph) {
  36                 copied = 0;
  37         }
  38
  39         @Override
  40         public void onPaste(WriteGraph graph, IImportAdvisor2 advisor, Set<Representation> representations) {
  41                 final Layer0 L0 = Layer0.getInstance(graph);
  42                 final ScenegraphResources SG = ScenegraphResources.getInstance(graph);
  43
  44                 try {
  45                         final Resource parent = advisor.getTarget();
  46                         if (parent == null)
  47                                 return;
  48
  49                         final Collection<Resource> roots = advisor.getRoots();
  50                         if (roots == null || roots.isEmpty())
  51                                 return;
  52
  53                         // Validate that the pasted roots are scene graph nodes.
  54                         for (Resource root : roots) {
  55                                 if (!graph.isInstanceOf(root, SG.Node))
  56                                         return;
  57                         }
  58
  59                         final Resource list = graph.syncRequest(new UniqueRead<Resource>() {
  60                                 @Override
  61                                 public Resource perform(ReadGraph g) throws DatabaseException {
  62                                         Resource res = g.getPossibleObject(parent, SG.Node_children);
  63                                         return (res == null || !g.isInstanceOf(res, L0.List)) ? null : res;
  64                                 }
  65                         });
  66
  67                         if (list == null)
  68                                 return;
  69
  70                         ListUtils.insertBack(graph, list, roots);
  71                         copied += roots.size();
  72
  73                 } catch (DatabaseException e) {
  74                         Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Failed to attach copied scene graph nodes to target composite node, see exception for details.", e));
  75                 }
  76         }
  77
  78         @Override
  79         public void onPasteEnd(WriteGraph graph) {
  80                 if (copied > 0) {
  81                         try {
  82                                 CommentMetadata cm = graph.getMetadata(CommentMetadata.class);
  83                                 graph.addMetadata(cm.add("Copy " + copied + " scene graph nodes."));
  84                         } catch (DatabaseException e) {
  85                                 Activator.getDefault().getLog().log(new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Failed to attach metadata to commit, see exception for details.", e));
  86                         }
  87                 }
  88         }
  89
  90 }