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

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