Issues-view menu improvements & Variable-based issue context resolution

[simantics/platform.git] / bundles / org.simantics.issues.ui / src / org / simantics / issues / ui / handler / Help.java

diff --git a/bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/handler/Help.java b/bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/handler/Help.java
new file mode 100644 (file)
index 0000000..ebdb5a4
--- /dev/null
+++ b/bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/handler/Help.java
@@ -0,0 +1,64 @@
+/*******************************************************************************
+ * 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);
+               }
+
+       }
+
+}