bundles/org.simantics.document.ui/src/org/simantics/document/ui/actions/FolderDropAction.java

   1 package org.simantics.document.ui.actions;\r
   2 \r
   3 import java.util.List;\r
   4 \r
   5 import org.simantics.db.ReadGraph;\r
   6 import org.simantics.db.Resource;\r
   7 import org.simantics.db.WriteGraph;\r
   8 import org.simantics.db.common.request.WriteRequest;\r
   9 import org.simantics.db.exception.DatabaseException;\r
  10 import org.simantics.db.layer0.SelectionHints;\r
  11 import org.simantics.db.layer0.adapter.DropActionFactory;\r
  12 import org.simantics.document.DocumentResource;\r
  13 import org.simantics.ui.SimanticsUI;\r
  14 import org.simantics.utils.ui.ISelectionUtils;\r
  15 \r
  16 public class FolderDropAction implements DropActionFactory {\r
  17         \r
  18         private Resource folderType;\r
  19         private Resource relation;\r
  20         private Resource inverse;\r
  21         \r
  22         public FolderDropAction(ReadGraph graph, String folderUri, String relationUri) throws DatabaseException {\r
  23                 folderType = graph.getResource(folderUri);\r
  24                 relation = graph.getResource(relationUri);\r
  25                 inverse = graph.getPossibleInverse(relation);\r
  26         }\r
  27         \r
  28         @Override\r
  29         public Runnable create(ReadGraph g, Object target, Object source, int operation) throws DatabaseException {\r
  30                 final Resource lib = ISelectionUtils.getSinglePossibleKey(target, SelectionHints.KEY_MAIN, Resource.class);\r
  31 \r
  32                 if (lib == null)\r
  33                         return null;\r
  34 \r
  35                 final List<Resource> selections = ISelectionUtils.getPossibleKeys(source, SelectionHints.KEY_MAIN, Resource.class);\r
  36 \r
  37                 if (selections.isEmpty()) {\r
  38                         return null;\r
  39                 }\r
  40                 if (!g.isInstanceOf(lib, folderType))\r
  41                         return null;\r
  42                 DocumentResource doc = DocumentResource.getInstance(g);\r
  43                 for (Resource r : selections) {\r
  44                         if (!g.isInstanceOf(r, doc.Document))\r
  45                                 return null;\r
  46                 }\r
  47                 Runnable runnable = new Runnable() {\r
  48 \r
  49                         @Override\r
  50                         public void run() {\r
  51                                 SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
  52 \r
  53                                         @Override\r
  54                                         public void perform(WriteGraph graph) throws DatabaseException {\r
  55                                                 \r
  56                                                 for (Resource r : selections) {\r
  57                                                         if (!graph.hasStatement(lib,relation,r)) {\r
  58                                                                 if (inverse != null) {\r
  59                                                                         // check if moved document is children of another document (tree revisions)\r
  60                                                                         // if it is, prevent moving it.\r
  61                                                                         Resource r2 = graph.getPossibleObject(r, inverse);\r
  62                                                                         if (r2 != null && !graph.isInstanceOf(r2, folderType))\r
  63                                                                                 continue;\r
  64                                                                         graph.deny(r,inverse);\r
  65                                                                 }\r
  66                                                                 graph.claim(lib, relation,r);\r
  67                                                         }\r
  68                                                 }\r
  69                                         }\r
  70                                 });\r
  71                         }\r
  72                 };\r
  73                 return runnable;\r
  74                 \r
  75         }\r
  76 \r
  77 }\r