org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/actions/AbstractOperationAction.java

   1 /*******************************************************************************
   2  * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.com>
   3  * Copyright (C) 2007, Shawn O. Pearce <spearce@spearce.org>
   4  *
   5  * All rights reserved. This program and the accompanying materials
   6  * are made available under the terms of the Eclipse Public License v1.0
   7  * which accompanies this distribution, and is available at
   8  * http://www.eclipse.org/legal/epl-v10.html
   9  *******************************************************************************/
  10 package org.eclipse.egit.ui.internal.actions;
  11
  12 import java.lang.reflect.InvocationTargetException;
  13 import java.util.Collections;
  14 import java.util.List;
  15
  16 import org.eclipse.core.runtime.CoreException;
  17 import org.eclipse.core.runtime.IProgressMonitor;
  18 import org.eclipse.core.runtime.IStatus;
  19 import org.eclipse.core.runtime.Status;
  20 import org.eclipse.egit.core.op.IEGitOperation;
  21 import org.eclipse.egit.ui.Activator;
  22 import org.eclipse.egit.ui.UIText;
  23 import org.eclipse.jface.action.IAction;
  24 import org.eclipse.jface.dialogs.ErrorDialog;
  25 import org.eclipse.jface.operation.IRunnableWithProgress;
  26 import org.eclipse.jface.viewers.ISelection;
  27 import org.eclipse.jface.viewers.IStructuredSelection;
  28 import org.eclipse.osgi.util.NLS;
  29 import org.eclipse.ui.IObjectActionDelegate;
  30 import org.eclipse.ui.IWorkbenchPart;
  31
  32 /**
  33  * Common functionality for EGit operations.
  34  */
  35 public abstract class AbstractOperationAction implements IObjectActionDelegate {
  36         /**
  37          * The active workbench part
  38          */
  39         protected IWorkbenchPart wp;
  40
  41         private IEGitOperation op;
  42
  43         private List selection;
  44
  45         public void selectionChanged(final IAction act, final ISelection sel) {
  46                 if (sel instanceof IStructuredSelection && !sel.isEmpty()) {
  47                         selection = ((IStructuredSelection) sel).toList();
  48                 } else {
  49                         selection = Collections.EMPTY_LIST;
  50                 }
  51         }
  52
  53         public void setActivePart(final IAction act, final IWorkbenchPart part) {
  54                 wp = part;
  55         }
  56
  57         /**
  58          * Instantiate an operation on an action on provided objects.
  59          * @param selection
  60          *
  61          * @return a {@link IEGitOperation} for invoking this operation later on
  62          */
  63         protected abstract IEGitOperation createOperation(final List selection);
  64
  65         /**
  66          * A method to invoke when the operation is finished.
  67          */
  68         protected void postOperation() {
  69                 // Empty
  70         }
  71
  72         public void run(final IAction act) {
  73                 op = createOperation(selection);
  74                 if (op != null) {
  75                         try {
  76                                 try {
  77                                         wp.getSite().getWorkbenchWindow().run(true, false,
  78                                                         new IRunnableWithProgress() {
  79                                                                 public void run(final IProgressMonitor monitor)
  80                                                                                 throws InvocationTargetException {
  81                                                                         try {
  82                                                                                 op.execute(monitor);
  83                                                                         } catch (CoreException ce) {
  84                                                                                 throw new InvocationTargetException(ce);
  85                                                                         }
  86                                                                 }
  87                                                         });
  88                                 } finally {
  89                                         postOperation();
  90                                 }
  91                         } catch (Throwable e) {
  92                                 final String msg = NLS.bind(UIText.GenericOperationFailed, act
  93                                                 .getText());
  94                                 final IStatus status;
  95
  96                                 if (e instanceof InvocationTargetException) {
  97                                         e = e.getCause();
  98                                 }
  99
 100                                 if (e instanceof CoreException) {
 101                                         status = ((CoreException) e).getStatus();
 102                                 } else {
 103                                         status = new Status(IStatus.ERROR, Activator.getPluginId(),
 104                                                         1, msg, e);
 105                                 }
 106
 107                                 Activator.logError(msg, e);
 108                                 ErrorDialog.openError(wp.getSite().getShell(), act.getText(),
 109                                                 msg, status, status.getSeverity());
 110                         }
 111                 }
 112         }
 113 }