+/*******************************************************************************
+ * Copyright (c) 2017 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Semantum Oy - initial API and implementation
+ *******************************************************************************/
+package org.simantics.issues.ui.handler;
+
+import org.eclipse.ui.PlatformUI;
+import org.simantics.Simantics;
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.binding.Binding;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.common.request.TernaryRead;
+import org.simantics.db.common.utils.Logger;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.layer0.adapter.ActionFactory;
+import org.simantics.db.layer0.variable.Variable;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.27.0
+ */
+public class Help implements ActionFactory {
+
+ @Override
+ public Runnable create(Object target) {
+ if (target instanceof Variable) {
+ return () -> {
+ try {
+ String id = Simantics.sync(new PossibleVariablePropertyValue<String>((Variable) target, "contextualHelpId", Bindings.STRING));
+ if (id == null) {
+ PlatformUI.getWorkbench().getHelpSystem().displayDynamicHelp();
+ return;
+ }
+ PlatformUI.getWorkbench().getHelpSystem().displayHelp(id);
+ } catch (DatabaseException e) {
+ Logger.defaultLogError(e);
+ }
+ };
+ }
+
+ return null;
+ }
+
+ static class PossibleVariablePropertyValue<T> extends TernaryRead<Variable, String, Binding, T> {
+
+ public PossibleVariablePropertyValue(Variable variable, String property, Binding binding) {
+ super(variable, property, binding);
+ }
+
+ @Override
+ public T perform(ReadGraph graph) throws DatabaseException {
+ return parameter.getPossiblePropertyValue(graph, parameter2, parameter3);
+ }
+
+ }
+
+}