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/**
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* Copyright (C) 2017 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.termtree.e4;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.UUID;
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import org.eclipse.e4.ui.di.UISynchronize;
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import org.eclipse.jface.util.LocalSelectionTransfer;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.TreeViewer;
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import org.eclipse.jface.viewers.Viewer;
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import org.eclipse.jface.viewers.ViewerDropAdapter;
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import org.eclipse.swt.dnd.DropTargetEvent;
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import org.eclipse.swt.dnd.TransferData;
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import eu.etaxonomy.cdm.model.description.Feature;
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import eu.etaxonomy.cdm.model.term.IHasTermType;
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import eu.etaxonomy.cdm.model.term.OrderedTermVocabulary;
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import eu.etaxonomy.cdm.model.term.TermType;
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import eu.etaxonomy.cdm.model.term.TermVocabulary;
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import eu.etaxonomy.cdm.persistence.dto.TermDto;
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import eu.etaxonomy.cdm.persistence.dto.TermNodeDto;
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import eu.etaxonomy.cdm.persistence.dto.TermTreeDto;
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import eu.etaxonomy.taxeditor.editor.definedterm.TermTransfer;
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import eu.etaxonomy.taxeditor.editor.definedterm.e4.DefinedTermDropAdapterE4;
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import eu.etaxonomy.taxeditor.l10n.Messages;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.termtree.TermNodeDtoTransfer;
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import eu.etaxonomy.taxeditor.termtree.e4.operation.AddFeatureOperation;
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import eu.etaxonomy.taxeditor.termtree.e4.operation.AddOntologyTermOperation;
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import eu.etaxonomy.taxeditor.termtree.e4.operation.MoveFeatureOperation;
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import eu.etaxonomy.taxeditor.ui.dialog.selection.TermVocabularySelectionDialog;
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import eu.etaxonomy.taxeditor.view.webimport.termimport.wrapper.OntologyTermWrapper;
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public class TermTreeDtoDropAdapter extends ViewerDropAdapter {
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protected ITermTreeEditor editor;
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private UISynchronize sync;
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public TermTreeDtoDropAdapter(ITermTreeEditor editor, Viewer viewer, UISynchronize sync) {
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super(viewer);
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this.editor = editor;
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this.sync = sync;
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}
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@Override
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public boolean performDrop(Object data) {
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Object currentTarget = getCurrentTarget();
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TermNodeDto target = null;
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if(currentTarget instanceof TermTreeDto){
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target = ((TermTreeDto) currentTarget).getRoot();
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}
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else if(currentTarget instanceof TermNodeDto){
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target = (TermNodeDto) currentTarget;
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}
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int position = 0;
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int location = getCurrentLocation();
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UUID parentUuid = target.getParentUuid();
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if(parentUuid!=null){
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TermNodeDto parent = editor.getNodeDtoForUuid(parentUuid);
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if (location == LOCATION_BEFORE) {
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position = Math.max(0, parent.getIndex(target));
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target = parent;
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}
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if (location == LOCATION_AFTER) {
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position = parent.getIndex(target)+1;
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target = parent;
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}
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}
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Collection<Object> droppedObjects = Collections.emptyList();
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if(data instanceof Object[]){
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droppedObjects = Arrays.asList((Object[])data);
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}
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else if(data instanceof IStructuredSelection){
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droppedObjects = ((IStructuredSelection) data).toList();
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}
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TreeViewer viewer = (TreeViewer) getViewer();
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// cannot drop a feature node onto itself
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for (Object droppedObject : droppedObjects) {
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if(droppedObject==null){
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MessagingUtils.warningDialog(DefinedTermDropAdapterE4.MOVE_FAILED, this.getClass(),
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Messages.FeatureTreeDropAdapter_MOVE_FAILED_SAVE_MESSAGE);
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return false;
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}
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if (droppedObject.equals(target)) {
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return false;
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}
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}
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for (Object droppedObject : droppedObjects) {
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//check term type compatibility
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TermType targetType = target.getType();
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TermType droppedType = null;
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if(droppedObject instanceof IHasTermType){
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droppedType = ((IHasTermType)droppedObject).getTermType();
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if(droppedType!=null && !droppedType.equals(targetType) && !droppedType.isKindOf(targetType)){
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MessagingUtils.warningDialog(DefinedTermDropAdapterE4.TERM_TYPE_ERROR_TITLE, this, DefinedTermDropAdapterE4.TERM_TYPE_ERROR_MESSAGE);
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continue;
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}
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}
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else if(droppedObject instanceof TermDto){
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droppedType = ((TermDto)droppedObject).getTermType();
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if(droppedType!=null && !droppedType.equals(targetType) && !droppedType.isKindOf(targetType)){
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MessagingUtils.warningDialog(DefinedTermDropAdapterE4.TERM_TYPE_ERROR_TITLE, this, DefinedTermDropAdapterE4.TERM_TYPE_ERROR_MESSAGE);
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continue;
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}
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}
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if(droppedObject instanceof TermNodeDto){
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if (((TermNodeDto)droppedObject).getUuid() == null || target.getUuid() == null){
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MessagingUtils.warningDialog("The new imported node needs to be saved first", this, "Newly created nodes can not be moved or used as parent without saving");
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return false;
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}
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TermNodeDto droppedNode = editor.getNodeDtoForUuid(((TermNodeDto) droppedObject).getUuid());
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TermNodeDto oldParent = editor.getNodeDtoForUuid(droppedNode.getParentUuid());
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boolean isCircle = checkCircle(droppedNode, target);
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if (isCircle || droppedNode.equals(target)){
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return false;
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}
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int currentPosition = oldParent.getIndex(droppedNode);
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if(currentPosition<position && target.equals(oldParent)){
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position -= 1;
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}
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MoveFeatureOperation operation = new MoveFeatureOperation(droppedNode.getUuid(), droppedNode.getTerm().getUuid(), target.getUuid(), position, getCurrentOperation(), editor, editor);
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Object o = oldParent.getChildren().remove(currentPosition);
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target.getChildren().add(position, droppedNode);
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droppedNode.setParentUuid(target.getUuid());
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editor.setNodeDtoForUuid(droppedNode);
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editor.setNodeDtoForUuid(target);
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editor.setNodeDtoForUuid(oldParent);
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editor.setDirty();
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editor.addOperation(operation);
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}
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else if(droppedObject instanceof Feature){
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Feature droppedFeature = (Feature) droppedObject;
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AddFeatureOperation operation = new AddFeatureOperation(
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droppedFeature.getUuid(),
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target.getUuid(), position, editor, editor);
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editor.setDirty();
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editor.addOperation(operation);
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}
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else if(droppedObject instanceof TermDto){
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TermDto termDto = (TermDto) droppedObject;
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// check if target feature tree has the same type as the dropped term
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if(!termDto.getTermType().equals(targetType)){
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MessagingUtils.warningDialog(DefinedTermDropAdapterE4.TERM_TYPE_ERROR_TITLE, this, DefinedTermDropAdapterE4.TERM_TYPE_ERROR_MESSAGE);
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continue;
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}
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AddFeatureOperation operation = new AddFeatureOperation(
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termDto.getUuid(),
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target.getUuid(), position, editor, editor);
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TermNodeDto newDto = new TermNodeDto(termDto, target, position, target.getTree(), null, null, null);
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editor.setDirty();
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editor.addOperation(operation);
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}
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else if(droppedObject instanceof OntologyTermWrapper){
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OntologyTermWrapper wrapper = (OntologyTermWrapper)droppedObject;
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TermVocabulary vocabulary = wrapper.getTermVocabulary();
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if(vocabulary==null){
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vocabulary = TermVocabularySelectionDialog.select(
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Messages.FeatureTreeDropAdapter_CHOOSE_VOC, viewer.getControl().getShell(), null);
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if(vocabulary instanceof OrderedTermVocabulary){
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MessagingUtils.warningDialog(Messages.FeatureTreeDropAdapter_IMPORT_NOT_POSSIBLE, this,
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Messages.FeatureTreeDropAdapter_ORDER_VOC_NOT_POSSIBLE);
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return false;
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}
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if(vocabulary == null){
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return false;
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}
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}
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AddOntologyTermOperation operation = new AddOntologyTermOperation(wrapper, target.getUuid(), vocabulary, editor, editor);
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editor.setDirty();
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editor.addOperation(operation);
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}
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}
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editor.getViewer().refresh();
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return true;
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}
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/**
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* @param droppedNode
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* @param target
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*/
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private boolean checkCircle(TermNodeDto droppedNode, TermNodeDto newParent) {
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boolean result = false;
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if (droppedNode.getChildren().contains(newParent) ){
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return true;
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}
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if (newParent.getParentUuid() != null){
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result = checkCircle(droppedNode, editor.getNodeDtoForUuid(newParent.getParentUuid()));
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}
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return result;
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}
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@Override
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public boolean validateDrop(Object target, int operation, TransferData transferData) {
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boolean
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isSupported = TermNodeDtoTransfer.getInstance().isSupportedType(transferData);
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isSupported |= TermTransfer.getInstance().isSupportedType(transferData);
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isSupported |= LocalSelectionTransfer.getTransfer().isSupportedType(transferData);
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isSupported &= getViewer().getInput()!=null;
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DropTargetEvent event = this.getCurrentEvent();
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TermTreeDto rootTree = null;
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if (getSelectedObject() instanceof TermNodeDto){
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TermNodeDto selectedNode = (TermNodeDto)getSelectedObject();
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rootTree = selectedNode.getTree();
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}
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if(target instanceof TermTreeDto && getCurrentLocation()!=ViewerDropAdapter.LOCATION_ON){
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return false;
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}
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if (target == null){
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return false;
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}
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if (target instanceof TermNodeDto && ((TermNodeDto)target).getTree().isFlat() && getCurrentLocation() == LOCATION_ON){
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return false;
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}
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TermDto term = null;
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if (getSelectedObject() instanceof TermNodeDto){
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term = ((TermNodeDto)getSelectedObject()).getTerm();
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isSupported = checkDuplication(target, rootTree, term);
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}
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if (term == null){
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TermTransfer transfer = TermTransfer.getInstance();
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if (transfer.getSelection() != null){
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TermDto dto = transfer.getSelection();
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isSupported = checkDuplication(target, rootTree, dto);
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}
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}
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return isSupported;
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}
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private boolean checkDuplication(Object target, TermTreeDto rootTree, TermDto term) {
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boolean isSupported = true;
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TermTreeDto targetTree = null;
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if (target instanceof TermNodeDto){
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targetTree = ((TermNodeDto)target).getTree();
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}else if (target instanceof TermTreeDto){
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targetTree = (TermTreeDto)target;
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}
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if (targetTree != null && !targetTree.isAllowDuplicate()){
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for (TermDto dto: targetTree.getTerms()){
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if (dto != null && dto.getUuid().equals(term.getUuid()) && !(rootTree != null && targetTree.equals(rootTree))){
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return false;
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}
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}
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}
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return true;
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}
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}
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