bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/modelBrowser/handlers/DeleteNodeHandler.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.ui.modelBrowser.handlers;
  13
  14 import java.lang.reflect.InvocationTargetException;
  15 import java.util.Set;
  16
  17 import org.eclipse.core.commands.AbstractHandler;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.runtime.IProgressMonitor;
  21 import org.eclipse.core.runtime.IStatus;
  22 import org.eclipse.core.runtime.Status;
  23 import org.eclipse.jface.dialogs.ProgressMonitorDialog;
  24 import org.eclipse.jface.operation.IRunnableWithProgress;
  25 import org.eclipse.jface.viewers.ISelection;
  26 import org.eclipse.swt.widgets.Shell;
  27 import org.eclipse.ui.handlers.HandlerUtil;
  28 import org.simantics.browsing.ui.NodeContext;
  29 import org.simantics.browsing.ui.common.node.DeleteException;
  30 import org.simantics.browsing.ui.common.node.IDeletable;
  31 import org.simantics.browsing.ui.common.node.IDeletableNode;
  32 import org.simantics.db.Resource;
  33 import org.simantics.db.WriteGraph;
  34 import org.simantics.db.common.request.WriteRequest;
  35 import org.simantics.db.exception.DatabaseException;
  36 import org.simantics.db.layer0.exception.CannotRemoveException;
  37 import org.simantics.db.layer0.util.RemoverUtil;
  38 import org.simantics.modeling.ui.Activator;
  39 import org.simantics.modeling.ui.modelBrowser.model.INode;
  40 import org.simantics.modeling.ui.modelBrowser.model.INode2;
  41 import org.simantics.ui.SimanticsUI;
  42 import org.simantics.utils.logging.TimeLogger;
  43 import org.simantics.utils.ui.ErrorLogger;
  44 import org.simantics.utils.ui.ISelectionUtils;
  45 import org.simantics.utils.ui.dialogs.ShowMessage;
  46
  47 /**
  48  * @author Tuukka Lehtonen
  49  */
  50 public class DeleteNodeHandler extends AbstractHandler {
  51
  52     @Override
  53     public Object execute(ExecutionEvent event) throws ExecutionException {
  54         TimeLogger.resetTimeAndLog(getClass(), "execute");
  55
  56         Shell shell = HandlerUtil.getActiveShellChecked(event);
  57         ISelection sel = HandlerUtil.getCurrentSelection(event);
  58         Set<NodeContext> ctxs = ISelectionUtils.filterSetSelection(sel, NodeContext.class);
  59         if (ctxs.isEmpty())
  60             return null;
  61
  62         if (ctxs.size() == 1 && handleLegacyDelete(ctxs.iterator().next())) {
  63             return null;
  64         }
  65
  66         // If all selected nodes are IDeletableNodes, delete them.
  67         final Set<IDeletableNode> deletableNodes = ISelectionUtils.filterSetSelection(ctxs, IDeletableNode.class);
  68         if (!deletableNodes.isEmpty()) {
  69             // Only delete if all selected nodes are IDeletableNodes
  70             if (deletableNodes.size() == ctxs.size()) {
  71                 inJob(shell, new IRunnableWithProgress() {
  72                     @Override
  73                     public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
  74                         monitor.beginTask("Delete selected nodes", IProgressMonitor.UNKNOWN);
  75                         try {
  76                             for (IDeletableNode deletableNode : deletableNodes) {
  77                                 deletableNode.delete();
  78                             }
  79                         } catch (DeleteException e) {
  80                             throw new InvocationTargetException(e);
  81                         }
  82                     }
  83                 });
  84             }
  85         } else {
  86             final Set<Resource> rs = ISelectionUtils.filterSetSelection(ctxs, Resource.class);
  87             if (rs.size() == ctxs.size()) {
  88                 inJob(shell, new IRunnableWithProgress() {
  89                     @Override
  90                     public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
  91                         monitor.beginTask("Delete selected nodes", IProgressMonitor.UNKNOWN);
  92                         try {
  93                             RemoverUtil.tryCollectionRemover(rs);
  94                         } catch (CannotRemoveException e) {
  95                                 ShowMessage.showInformation("Delete Selection Was Denied", e.getLocalizedMessage());
  96                         } catch (DatabaseException e) {
  97                             throw new InvocationTargetException(e);
  98                         }
  99                     }
 100                 });
 101             }
 102         }
 103
 104         TimeLogger.log("Node deleted");
 105         return null;
 106     }
 107
 108     private void inJob(Shell shell, final IRunnableWithProgress runnable) {
 109         ProgressMonitorDialog dialog = new ProgressMonitorDialog(shell);
 110         try {
 111             dialog.run(true, false, runnable);
 112         } catch (InvocationTargetException e) {
 113             Activator.getDefault().getLog().log( new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Delete failed, see exception for details.", e.getCause()) );
 114         } catch (InterruptedException e) {
 115             Activator.getDefault().getLog().log( new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Delete failed, see exception for details.", e.getCause()) );
 116         }
 117 //        Job job = new Job("Delete selection") {
 118 //            @Override
 119 //            protected IStatus run(IProgressMonitor monitor) {
 120 //                monitor.beginTask("Delete selected nodes", IProgressMonitor.UNKNOWN);
 121 //                try {
 122 //                    runnable.run(monitor);
 123 //                    return Status.OK_STATUS;
 124 //                } catch (InvocationTargetException e) {
 125 //                    return new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Delete failed, see exception for details.", e.getCause());
 126 //                } catch (Exception e) {
 127 //                    return new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Delete failed, see exception for details.", e);
 128 //                } finally {
 129 //                    monitor.done();
 130 //                }
 131 //            }
 132 //        };
 133 //        job.setUser(true);
 134 //        job.setRule(new ObjectIdentitySchedulingRule(schedulingObject));
 135 //        job.schedule();
 136     }
 137
 138
 139     /**
 140      * @param ctx
 141      * @return
 142      */
 143     private boolean handleLegacyDelete(NodeContext ctx) {
 144         if (ctx.getAdapter(IDeletable.class) == null) {
 145             return false;
 146         }
 147
 148         final INode node = (INode) ctx.getAdapter(INode.class);
 149         if (node != null) {
 150             SimanticsUI.getSession().asyncRequest(new WriteRequest() {
 151                 @Override
 152                 public void perform(WriteGraph graph) throws DatabaseException {
 153                     node.handleDelete(graph);
 154                 }
 155             });
 156             return true;
 157         }
 158
 159         INode2 node2 = (INode2) ctx.getAdapter(INode2.class);
 160         if (node2 != null) {
 161             try {
 162                 node2.handleDelete();
 163             } catch (DeleteException e) {
 164                 ShowMessage.showError("Delete failed", e.getMessage());
 165                 ErrorLogger.defaultLogError(e);
 166             }
 167             return true;
 168         }
 169
 170         // Could not handle with legacy logic.
 171         return false;
 172     }
 173
 174 }