Clean and refactor cms.ui.workbench bundle

[lgpl/argeo-commons.git] / org.argeo.cms.ui.workbench / src / org / argeo / cms / ui / workbench / internal / jcr / commands / DeleteNodes.java

diff --git a/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/jcr/commands/DeleteNodes.java b/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/jcr/commands/DeleteNodes.java
new file mode 100644 (file)
index 0000000..219d854
--- /dev/null
+++ b/org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/internal/jcr/commands/DeleteNodes.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.cms.ui.workbench.internal.jcr.commands;
+
+import java.util.Iterator;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.cms.ui.workbench.internal.jcr.model.SingleJcrNodeElem;
+import org.argeo.cms.ui.workbench.internal.jcr.model.WorkspaceElem;
+import org.argeo.cms.ui.workbench.jcr.JcrBrowserView;
+import org.argeo.eclipse.ui.EclipseUiException;
+import org.argeo.eclipse.ui.TreeParent;
+import org.argeo.eclipse.ui.dialogs.ErrorFeedback;
+import org.eclipse.core.commands.AbstractHandler;
+import org.eclipse.core.commands.ExecutionEvent;
+import org.eclipse.core.commands.ExecutionException;
+import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.ui.handlers.HandlerUtil;
+
+/**
+ * Delete the selected nodes: both in the JCR repository and in the UI view.
+ * Warning no check is done, except implementation dependent native checks,
+ * handle with care.
+ * 
+ * This handler is still 'hard linked' to a GenericJcrBrowser view to enable
+ * correct tree refresh when a node is added. This must be corrected in future
+ * versions.
+ */
+public class DeleteNodes extends AbstractHandler {
+       public Object execute(ExecutionEvent event) throws ExecutionException {
+               ISelection selection = HandlerUtil.getActiveWorkbenchWindow(event)
+                               .getActivePage().getSelection();
+               if (selection == null || !(selection instanceof IStructuredSelection))
+                       return null;
+
+               JcrBrowserView view = (JcrBrowserView) HandlerUtil
+                               .getActiveWorkbenchWindow(event).getActivePage()
+                               .findView(HandlerUtil.getActivePartId(event));
+
+               // confirmation
+               StringBuffer buf = new StringBuffer("");
+               Iterator<?> lst = ((IStructuredSelection) selection).iterator();
+               while (lst.hasNext()) {
+                       SingleJcrNodeElem sjn = ((SingleJcrNodeElem) lst.next());
+                       buf.append(sjn.getName()).append(' ');
+               }
+               Boolean ok = MessageDialog.openConfirm(
+                               HandlerUtil.getActiveShell(event), "Confirm deletion",
+                               "Do you want to delete " + buf + "?");
+
+               // operation
+               if (ok) {
+                       Iterator<?> it = ((IStructuredSelection) selection).iterator();
+                       Object obj = null;
+                       SingleJcrNodeElem ancestor = null;
+                       WorkspaceElem rootAncestor = null;
+                       try {
+                               while (it.hasNext()) {
+                                       obj = it.next();
+                                       if (obj instanceof SingleJcrNodeElem) {
+                                               // Cache objects
+                                               SingleJcrNodeElem sjn = (SingleJcrNodeElem) obj;
+                                               TreeParent tp = (TreeParent) sjn.getParent();
+                                               Node node = sjn.getNode();
+
+                                               // Jcr Remove
+                                               node.remove();
+                                               node.getSession().save();
+                                               // UI remove
+                                               tp.removeChild(sjn);
+
+                                               // Check if the parent is the root node
+                                               if (tp instanceof WorkspaceElem)
+                                                       rootAncestor = (WorkspaceElem) tp;
+                                               else
+                                                       ancestor = getOlder(ancestor, (SingleJcrNodeElem) tp);
+                                       }
+                               }
+                               if (rootAncestor != null)
+                                       view.nodeRemoved(rootAncestor);
+                               else if (ancestor != null)
+                                       view.nodeRemoved(ancestor);
+                       } catch (Exception e) {
+                               ErrorFeedback.show("Cannot delete selected node ", e);
+                       }
+               }
+               return null;
+       }
+
+       private SingleJcrNodeElem getOlder(SingleJcrNodeElem A, SingleJcrNodeElem B) {
+               try {
+                       if (A == null)
+                               return B == null ? null : B;
+                       // Todo enhanced this method
+                       else
+                               return A.getNode().getDepth() <= B.getNode().getDepth() ? A : B;
+               } catch (RepositoryException re) {
+                       throw new EclipseUiException("Cannot find ancestor", re);
+               }
+       }
+}