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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2018 VTT Technical Research Centre of Finland and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     VTT Technical Research Centre of Finland - initial API and implementation
  10  *     Semantum Oy - gitlab simantics/platform#133
  11  *******************************************************************************/
  12 package org.simantics.modeling.ui.modelBrowser.handlers;
  13
  14 import java.util.Arrays;
  15 import java.util.HashSet;
  16 import java.util.Set;
  17
  18 import org.eclipse.core.commands.AbstractHandler;
  19 import org.eclipse.core.commands.ExecutionEvent;
  20 import org.eclipse.core.commands.ExecutionException;
  21 import org.eclipse.core.runtime.IProgressMonitor;
  22 import org.eclipse.core.runtime.IStatus;
  23 import org.eclipse.core.runtime.Status;
  24 import org.eclipse.core.runtime.SubMonitor;
  25 import org.eclipse.core.runtime.jobs.Job;
  26 import org.eclipse.jface.action.IStatusLineManager;
  27 import org.eclipse.jface.viewers.ISelection;
  28 import org.eclipse.ui.PlatformUI;
  29 import org.eclipse.ui.handlers.HandlerUtil;
  30 import org.simantics.Simantics;
  31 import org.simantics.db.ReadGraph;
  32 import org.simantics.db.Resource;
  33 import org.simantics.db.common.request.ReadRequest;
  34 import org.simantics.db.exception.DatabaseException;
  35 import org.simantics.db.layer0.adapter.CopyHandler;
  36 import org.simantics.db.layer0.util.SimanticsClipboardImpl;
  37 import org.simantics.modeling.ui.Activator;
  38 import org.simantics.ui.utils.ResourceAdaptionUtils;
  39 import org.simantics.utils.ui.SWTUtils;
  40 import org.simantics.utils.ui.workbench.WorkbenchUtils;
  41 import org.slf4j.Logger;
  42 import org.slf4j.LoggerFactory;
  43
  44 public class StandardCutHandler extends AbstractHandler {
  45
  46     private static final Logger LOGGER = LoggerFactory.getLogger(StandardCutHandler.class);
  47
  48     private static IStatusLineManager status;
  49
  50     @Override
  51     public Object execute(ExecutionEvent event) throws ExecutionException {
  52         status = WorkbenchUtils.getStatusLine( HandlerUtil.getActiveSite(event) );
  53         ISelection selection = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getSelectionService().getSelection();
  54         final Resource[] rs = ResourceAdaptionUtils.toResources( selection );
  55         if (rs == null) {
  56             setStatus("Nothing to cut.");
  57            return null;
  58         }
  59         Job job = new Job("Cut resources") {
  60
  61             @Override
  62             protected IStatus run(IProgressMonitor monitor) {
  63                 monitor.beginTask("Cut resources", rs.length);
  64                 try {
  65                     final SimanticsClipboardImpl builder = new SimanticsClipboardImpl();
  66
  67                     Simantics.getSession().syncRequest(new ReadRequest() {
  68                         @Override
  69                         public void run(ReadGraph graph) throws DatabaseException {
  70                             Set<Resource> unique = new HashSet<>();
  71                             for (Resource r : rs) {
  72                                 if (!unique.add(r))
  73                                     continue;
  74                                 CopyHandler handler = graph.adapt(r, CopyHandler.class);
  75                                 handler.cutToClipboard(graph, builder, SubMonitor.convert(monitor, 1));
  76                             }
  77                         }
  78                     });
  79
  80                     Simantics.setClipboard(builder);
  81                     setCutMessage(builder.getContents().size(), "resource");
  82                     return Status.OK_STATUS;
  83                 } catch (DatabaseException e) {
  84                     LOGGER.error("Cut operation failed", e); //$NON-NLS-1$
  85                     return new Status(IStatus.ERROR, Activator.PLUGIN_ID, "Cut operation failed", e);
  86                 }
  87             }
  88         };
  89         job.setUser(true);
  90         job.schedule();
  91
  92         return null;
  93     }
  94
  95     private static void setCutMessage(int count, String elementName) {
  96         if (count > 1)
  97             setStatus("Cut " + count + " " + elementName + "s to clipboard");
  98         else if (count == 1)
  99             setStatus("Cut " + elementName + " to clipboard");
 100         else
 101             setStatus("Nothing to cut.");
 102     }
 103
 104     private static void setStatus(String message) {
 105         if (status != null) {
 106             SWTUtils.asyncExec(
 107                     PlatformUI.getWorkbench().getDisplay(),
 108                     () -> status.setMessage(message));
 109         }
 110     }
 111
 112     public static String cutResourcesToClipboard(final Resource[] rs, ISelection selection) {
 113         try {
 114             final SimanticsClipboardImpl builder = new SimanticsClipboardImpl();
 115             Simantics.getSession().syncRequest(new ReadRequest() {
 116                 @Override
 117                 public void run(ReadGraph graph) throws DatabaseException {
 118                     for (Resource r : rs) {
 119                         CopyHandler handler = graph.adapt(r, CopyHandler.class);
 120                         handler.cutToClipboard(graph, builder, null);
 121                     }
 122                 }
 123             });
 124             Simantics.setClipboard(builder);
 125             setCutMessage(builder.getContents().size(), "resource");
 126         } catch (DatabaseException e) {
 127             LOGGER.error("Failed to cut {} resources to clipboard: {}", rs.length, Arrays.toString(rs), e); //$NON-NLS-1$
 128         }
 129
 130         return null;
 131     }
 132
 133 }