+package org.argeo.cms.e4.jcr.handlers;
+
+import java.util.List;
+
+import javax.inject.Named;
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.cms.e4.jcr.JcrBrowserView;
+import org.argeo.cms.ui.jcr.model.SingleJcrNodeElem;
+import org.argeo.cms.ui.jcr.model.WorkspaceElem;
+import org.argeo.cms.ux.widgets.TreeParent;
+import org.argeo.eclipse.ui.EclipseUiException;
+import org.argeo.eclipse.ui.dialogs.ErrorFeedback;
+import org.eclipse.e4.core.di.annotations.Execute;
+import org.eclipse.e4.ui.model.application.ui.basic.MPart;
+import org.eclipse.e4.ui.services.IServiceConstants;
+import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
+import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.swt.widgets.Display;
+
+/**
+ * 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 {
+ @Execute
+ public void execute(@Named(IServiceConstants.ACTIVE_PART) MPart part, ESelectionService selectionService) {
+ List<?> selection = (List<?>) selectionService.getSelection();
+ if (selection == null)
+ return;
+
+ JcrBrowserView view = (JcrBrowserView) part.getObject();
+
+ // confirmation
+ StringBuffer buf = new StringBuffer("");
+ for (Object o : selection) {
+ SingleJcrNodeElem sjn = (SingleJcrNodeElem) o;
+ buf.append(sjn.getName()).append(' ');
+ }
+ Boolean doRemove = MessageDialog.openConfirm(Display.getCurrent().getActiveShell(), "Confirm deletion",
+ "Do you want to delete " + buf + "?");
+
+ // operation
+ if (doRemove) {
+ SingleJcrNodeElem ancestor = null;
+ WorkspaceElem rootAncestor = null;
+ try {
+ for (Object obj : selection) {
+ 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);
+ }
+ }
+ }
+
+ 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);
+ }
+ }
+}