Ask to link library to model when dropping symbol from unlinked library

[simantics/platform.git] / bundles / org.simantics.modeling.ui / src / org / simantics / modeling / ui / diagramEditor / dnd / DropSuggestions.java

diff --git a/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/dnd/DropSuggestions.java b/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/dnd/DropSuggestions.java
new file mode 100644 (file)
index 0000000..0ff4415
--- /dev/null
+++ b/bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/diagramEditor/dnd/DropSuggestions.java
@@ -0,0 +1,104 @@
+/*******************************************************************************
+ * Copyright (c) 2018 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.modeling.ui.diagramEditor.dnd;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.eclipse.jface.dialogs.Dialog;
+import org.eclipse.osgi.util.NLS;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.widgets.Shell;
+import org.simantics.NameLabelMode;
+import org.simantics.NameLabelUtil;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.exception.ValidationException;
+import org.simantics.db.layer0.request.IsLinkedTo;
+import org.simantics.db.request.Write;
+import org.simantics.layer0.Layer0;
+
+/**
+ * @author Tuukka Lehtonen
+ * @since 1.37.0
+ */
+public class DropSuggestions {
+
+    public static boolean askSuggestions(Shell parent, List<DropSuggestion> suggestions) {
+        return Dialog.OK == MarkupDialog.open(parent,
+                "diagram.dropSuggestionDialog", //$NON-NLS-1$
+                Messages.DropSuggestions_ApplySuggestions_DialogTitle,
+                Messages.DropSuggestions_ApplySuggestions_DialogMsg,
+                formatSuggestions(suggestions),
+                SWT.ICON_QUESTION,
+                SWT.NONE,
+                SWT.BORDER | SWT.WRAP | SWT.V_SCROLL);
+    }
+
+    private static String formatSuggestions(List<DropSuggestion> suggestions) {
+        return suggestions.stream()
+                .map(DropSuggestion::toString)
+                .collect(Collectors.joining("\n", "- ", "")); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
+    }
+
+    public static Write performSuggestionsRequest(List<DropSuggestion> suggestions) {
+        return (Write) graph -> {
+            for (DropSuggestion s : suggestions) {
+                s.fix(graph);
+            }
+        };
+    }
+
+    public static DropSuggestion linkToLibrary(ReadGraph graph, Resource linkSource, Resource linkTarget) throws DatabaseException {
+        return new LinkToLibrary(
+                NLS.bind(Messages.DropSuggestions_Description_LinkToLibrary,
+                        NameLabelUtil.modalName(graph, linkSource, NameLabelMode.NAME_AND_LABEL),
+                        NameLabelUtil.modalName(graph, linkTarget, NameLabelMode.NAME_AND_LABEL))
+                , linkSource, linkTarget);
+    }
+
+    public static class LinkToLibrary implements DropSuggestion {
+
+        private final String desc;
+        private final Resource linkFrom;
+        private final Resource linkTo;
+
+        public LinkToLibrary(String desc, Resource linkFrom, Resource linkTo) {
+            this.desc = desc;
+            this.linkFrom = linkFrom;
+            this.linkTo = linkTo;
+        }
+
+        @Override
+        public void fix(WriteGraph graph) throws DatabaseException {
+            // Ensure that there is no reverse link between the namespaces
+            if (graph.syncRequest(new IsLinkedTo(linkFrom, linkTo))) {
+                throw new ValidationException(
+                        NLS.bind(Messages.DropSuggestions_Problem_CyclicDependency
+                                , NameUtils.getURIOrSafeNameInternal(graph, linkTo)
+                                , NameUtils.getURIOrSafeNameInternal(graph, linkFrom)));
+            }
+            Layer0 L0 = Layer0.getInstance(graph);
+            graph.claim(linkFrom, L0.IsLinkedTo, L0.IsLinkedTo_Inverse, linkTo);
+        }
+
+        @Override
+        public String toString() {
+            return desc;
+        }
+
+    }
+
+}