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diff --git a/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictNetworkUIUtil.java b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictNetworkUIUtil.java
new file mode 100644
index 00000000..9ce6937a
--- /dev/null
+++ b/org.simantics.district.network.ui/src/org/simantics/district/network/ui/DistrictNetworkUIUtil.java
@@ -0,0 +1,168 @@
+package org.simantics.district.network.ui;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.function.Consumer;
+
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.ui.IEditorPart;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.request.UnaryRead;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.request.PossibleModel;
+import org.simantics.db.layer0.variable.RVI;
+import org.simantics.db.layer0.variable.Variable;
+import org.simantics.db.layer0.variable.Variables;
+import org.simantics.district.network.DistrictNetworkUtil;
+import org.simantics.g2d.canvas.ICanvasContext;
+import org.simantics.g2d.diagram.DiagramHints;
+import org.simantics.layer0.Layer0;
+import org.simantics.modeling.ModelingResources;
+import org.simantics.modeling.actions.NavigateToTarget;
+import org.simantics.scl.runtime.tuple.Tuple4;
+import org.simantics.ui.selection.WorkbenchSelectionUtils;
+import org.simantics.utils.threads.ThreadUtils;
+import org.simantics.utils.ui.ISelectionUtils;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.35.0
+ */
+public class DistrictNetworkUIUtil {
+
+    public static Resource getInputResource(ReadGraph graph, Object input) throws DatabaseException {
+        if (input instanceof Resource) {
+            return (Resource) input;
+        } else if (input instanceof Variable) {
+            return ((Variable) input).getPossibleRepresents(graph);
+        } else if (input instanceof ISelection) {
+            return ISelectionUtils.filterSingleSelection((ISelection) input, Resource.class);
+        } else {
+            return WorkbenchSelectionUtils.getPossibleResource(graph, input);
+        }
+    }
+
+    public static class GetInputResource extends UnaryRead<Object, Resource> {
+
+        public GetInputResource(Object input) {
+            super(input);
+        }
+
+        @Override
+        public Resource perform(ReadGraph graph) throws DatabaseException {
+            return getInputResource(graph, parameter);
+        }
+
+    }
+
+    public static class Input extends Tuple4 {
+        public Input(Resource model, Resource diagram, Resource element, RVI diagramCompositeRvi) {
+            super(model, diagram, element, diagramCompositeRvi);
+        }
+        public Resource model() {
+            return (Resource) get(0);
+        }
+        public Resource diagram() {
+            return (Resource) get(1);
+        }
+        public Resource element() {
+            return (Resource) get(2);
+        }
+        public RVI rvi() {
+            return (RVI) get(3);
+        }
+    }
+
+    public static class FindMappedDNElement extends UnaryRead<Object, Input> {
+
+        public FindMappedDNElement(Object parameter) {
+            super(parameter);
+        }
+
+        @Override
+        public Input perform(ReadGraph graph) throws DatabaseException {
+            Resource e = DistrictNetworkUtil.getMappedDNElement(graph,
+                    DistrictNetworkUtil.getDiagramElement(graph,
+                            getInputResource(graph, parameter)));
+            return e != null ? graph.syncRequest(new ElementToInput(e)) : null;
+        }
+
+    }
+
+    public static class FindMappedComponent extends UnaryRead<Object, Input> {
+
+        public FindMappedComponent(Object parameter) {
+            super(parameter);
+        }
+
+        @Override
+        public Input perform(ReadGraph graph) throws DatabaseException {
+            Resource e = DistrictNetworkUtil.getMappedElement(graph,
+                    getInputResource(graph, parameter));
+            return e != null ? graph.syncRequest(new ElementToInput(e)) : null;
+        }
+
+    }
+
+    public static class ElementToInput extends UnaryRead<Resource, Input> {
+
+        public ElementToInput(Resource element) {
+            super(element);
+        }
+
+        @Override
+        public Input perform(ReadGraph graph) throws DatabaseException {
+            Layer0 L0 = Layer0.getInstance(graph);
+            Resource diagram = graph.getPossibleObject(parameter, L0.PartOf);
+            if (diagram == null)
+                return null;
+
+            Resource model = graph.syncRequest(new PossibleModel(diagram));
+            if (model == null)
+                return null;
+
+            RVI rvi = getDiagramCompositeRvi(graph, diagram);
+            if (rvi == null)
+                return null;
+
+            return new Input(model, diagram, parameter, rvi);
+        }
+
+        private static RVI getDiagramCompositeRvi(ReadGraph graph, Resource diagram) throws DatabaseException {
+            ModelingResources MOD = ModelingResources.getInstance(graph);
+            Resource composite = graph.getPossibleObject(diagram, MOD.DiagramToComposite);
+            if (composite == null)
+                return null;
+            Variable v = Variables.getPossibleVariable(graph, composite);
+            return v != null ? v.getPossibleRVI(graph) : null;
+        }
+
+    }
+
+    public static Consumer<IEditorPart> editorActivationCallback(final Collection<? extends Object> selectedObjects) {
+        return part -> {
+            final ICanvasContext openedCanvas = (ICanvasContext) part.getAdapter(ICanvasContext.class);
+            assert openedCanvas != null;
+            // CanvasContext-wide denial of initial zoom-to-fit on diagram open.
+            openedCanvas.getDefaultHintContext().setHint(DiagramHints.KEY_INITIAL_ZOOM_TO_FIT, Boolean.FALSE);
+            ThreadUtils.asyncExec(openedCanvas.getThreadAccess(),
+                    NavigateToTarget.elementSelectorZoomer(openedCanvas, selectedObjects, false));
+        };
+    }
+
+    public static void openEditorWithSelection(String editorId, Input input, Object... selection) {
+        NavigateToTarget.editorActivator(
+                editorId,
+                input.diagram(),
+                input.model(),
+                input.rvi(),
+                DistrictNetworkUIUtil.editorActivationCallback(Arrays.asList(selection)))
+        .run();
+    }
+
+    public static void openDNDiagramEditorWithSelection(Input input, Object... selection) {
+        openEditorWithSelection(DistrictDiagramEditor.ID, input, selection);
+    }
+
+}