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

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