org.simantics.district.network.ui/src/org/simantics/district/network/ui/contributions/NetworkElementActionMenuContribution.java

   1 package org.simantics.district.network.ui.contributions;
   2
   3 import java.util.Collections;
   4 import java.util.List;
   5
   6 import javax.inject.Named;
   7
   8 import org.eclipse.e4.core.di.annotations.CanExecute;
   9 import org.eclipse.e4.core.di.annotations.Execute;
  10 import org.eclipse.e4.ui.di.AboutToHide;
  11 import org.eclipse.e4.ui.di.AboutToShow;
  12 import org.eclipse.e4.ui.model.application.ui.menu.MDirectMenuItem;
  13 import org.eclipse.e4.ui.model.application.ui.menu.MMenu;
  14 import org.eclipse.e4.ui.model.application.ui.menu.MMenuElement;
  15 import org.eclipse.e4.ui.model.application.ui.menu.MMenuFactory;
  16 import org.eclipse.e4.ui.services.IServiceConstants;
  17 import org.simantics.Simantics;
  18 import org.simantics.db.ReadGraph;
  19 import org.simantics.db.Resource;
  20 import org.simantics.db.WriteGraph;
  21 import org.simantics.db.common.procedure.adapter.TransientCacheListener;
  22 import org.simantics.db.common.request.ResourceRead;
  23 import org.simantics.db.common.request.WriteRequest;
  24 import org.simantics.db.exception.DatabaseException;
  25 import org.simantics.db.exception.NoSingleResultException;
  26 import org.simantics.db.layer0.SelectionHints;
  27 import org.simantics.db.layer0.util.Layer0Utils;
  28 import org.simantics.db.layer0.variable.Variable;
  29 import org.simantics.db.layer0.variable.Variables;
  30 import org.simantics.district.network.ontology.DistrictNetworkResource;
  31 import org.simantics.layer0.Layer0;
  32 import org.simantics.modeling.ModelingResources;
  33 import org.simantics.scl.compiler.top.ValueNotFound;
  34 import org.simantics.scl.osgi.SCLOsgi;
  35 import org.simantics.scl.runtime.SCLContext;
  36 import org.simantics.scl.runtime.function.Function;
  37 import org.simantics.scl.runtime.tuple.Tuple2;
  38 import org.simantics.utils.ui.ISelectionUtils;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 public class NetworkElementActionMenuContribution {
  43
  44     static private Logger LOGGER = LoggerFactory.getLogger(NetworkElementActionMenuContribution.class);
  45
  46     @AboutToShow
  47     public void aboutToShow(@Named(IServiceConstants.ACTIVE_SELECTION) Object selection, List<MMenuElement> items) {
  48         final List<Resource> vertices = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  49         if (vertices.size() != 1)
  50             return;
  51
  52         Resource vertex = vertices.get(0);
  53
  54         List<Tuple2> actions;
  55         try {
  56             actions = Simantics.getSession().syncRequest(new ActionItemRequest(vertex), TransientCacheListener.instance());
  57         } catch (DatabaseException e) {
  58             LOGGER.error("Error fetching action items for " + vertex, e);
  59             return;
  60         }
  61
  62         if (actions == null || actions.isEmpty())
  63             return;
  64
  65         items.add(MMenuFactory.INSTANCE.createMenuSeparator());
  66         MMenu subMenu = MMenuFactory.INSTANCE.createMenu();
  67         List<MMenuElement> children = subMenu.getChildren();
  68         subMenu.setLabel("Component Actions");
  69         items.add(subMenu);
  70
  71         for (Tuple2 action : actions) {
  72             String label = (String) action.c0;
  73             @SuppressWarnings("rawtypes")
  74             Function function = (Function) action.c1;
  75
  76             Object handler = new Object() {
  77                 @CanExecute
  78                 public boolean canExecute() {
  79                     try {
  80                         return Simantics.getSession().syncRequest(new ResourceRead<Boolean>(vertex) {
  81                             @Override
  82                             public Boolean perform(ReadGraph graph) throws DatabaseException {
  83                                 DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
  84                                 return graph.isInstanceOf(vertex, DN.Element) && graph.hasStatement(vertex, DN.MappedComponent);
  85                             }
  86                         }, TransientCacheListener.instance());
  87                     } catch (DatabaseException e) {
  88                         return false;
  89                     }
  90                 }
  91
  92                 @Execute
  93                 public void execute() {
  94                     Simantics.getSession().asyncRequest(new WriteRequest() {
  95                         @SuppressWarnings("unchecked")
  96                         @Override
  97                         public void perform(WriteGraph graph) throws DatabaseException {
  98                             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
  99                             Resource component = graph.getPossibleObject(vertex, DN.MappedComponent);
 100                             if (component == null)
 101                                 return;
 102
 103                             Variable v = Variables.getVariable(graph, graph.getSingleObject(component, ModelingResources.getInstance(graph).ElementToComponent));
 104
 105                             graph.markUndoPoint();
 106                             Layer0Utils.addCommentMetadata(graph, label + " for " + v.getName(graph));
 107
 108                             Simantics.applySCLWrite(graph, function, v);
 109                         }
 110                     }, (DatabaseException e) -> LOGGER.error("Running command " + label + " for " + vertex + " failed", e));
 111                 }
 112             };
 113
 114             MDirectMenuItem dynamicItem = MMenuFactory.INSTANCE.createDirectMenuItem();
 115             dynamicItem.setLabel(label);
 116             dynamicItem.setObject(handler);
 117             children.add(dynamicItem);
 118         }
 119     }
 120
 121     @AboutToHide
 122     public void aboutToHide() {
 123     }
 124
 125     private static final class ActionItemRequest extends ResourceRead<List<Tuple2>> {
 126         private ActionItemRequest(Resource resource) {
 127             super(resource);
 128         }
 129
 130         @SuppressWarnings("unchecked")
 131         @Override
 132         public List<Tuple2> perform(ReadGraph graph) throws DatabaseException {
 133             Layer0 L0 = Layer0.getInstance(graph);
 134             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
 135
 136             if (!graph.isInstanceOf(resource, DN.Element))
 137                 return Collections.emptyList();
 138
 139             Resource component = graph.getPossibleObject(resource, DN.MappedComponent);
 140             if (component == null)
 141                 return Collections.emptyList();
 142
 143             Resource mapping = graph.getPossibleObject(resource, DN.HasMapping);
 144             if (mapping == null)
 145                 return Collections.emptyList();
 146
 147             String name = graph.getPossibleRelatedValue(mapping, DN.Mapping_ComponentType);
 148             if (name == null)
 149                 return Collections.emptyList();
 150
 151             Resource root = graph.getSingleObject(graph.getSingleObject(mapping, L0.PartOf), L0.PartOf);
 152             Resource uc = Layer0Utils.getPossibleChild(graph, root, name);
 153             if (uc == null)
 154                 return Collections.emptyList();
 155
 156             Resource actionsModule = Layer0Utils.getPossibleChild(graph, uc, "Actions");
 157             if (actionsModule == null)
 158                 return Collections.emptyList();
 159
 160             String uri = graph.getURI(actionsModule);
 161             SCLContext sclContext = SCLContext.getCurrent();
 162             Object oldGraph = sclContext.put("graph", graph);
 163             try {
 164                 @SuppressWarnings("rawtypes")
 165                 Function actionsFun = (Function) SCLOsgi.MODULE_REPOSITORY.getValue(uri, "actions");
 166                 Variable variable = Variables.getPossibleVariable(graph, graph.getSingleObject(component, ModelingResources.getInstance(graph).ElementToComponent));
 167                 return (List<Tuple2>) actionsFun.apply(variable);
 168             }
 169             catch (ValueNotFound e) {
 170                 throw new NoSingleResultException("No value for " + uri + "/actions", e);
 171             }
 172             finally {
 173                 sclContext.put("graph", oldGraph);
 174             }
 175         }
 176     }
 177 }