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

   1 /*******************************************************************************
   2  * Copyright (C) 2010, Jens Baumgart <jens.baumgart@sap.com>
   3  *
   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 package org.eclipse.egit.ui.internal.actions;
  10
  11 import java.util.ArrayList;
  12 import java.util.Collections;
  13 import java.util.List;
  14
  15 import org.eclipse.core.runtime.CoreException;
  16 import org.eclipse.core.runtime.IProgressMonitor;
  17 import org.eclipse.core.runtime.IStatus;
  18 import org.eclipse.core.runtime.Status;
  19 import org.eclipse.core.runtime.jobs.Job;
  20 import org.eclipse.egit.core.op.IEGitOperation;
  21 import org.eclipse.egit.ui.Activator;
  22 import org.eclipse.egit.ui.internal.history.RevObjectSelectionProvider;
  23 import org.eclipse.jface.action.IAction;
  24 import org.eclipse.jface.viewers.ISelection;
  25 import org.eclipse.jface.viewers.IStructuredSelection;
  26 import org.eclipse.jgit.lib.Repository;
  27 import org.eclipse.jgit.revwalk.RevCommit;
  28 import org.eclipse.ui.IObjectActionDelegate;
  29 import org.eclipse.ui.IWorkbenchPart;
  30
  31 /**
  32  * Common functionality resource based EGit operations.
  33  *
  34  */
  35 public abstract class AbstractRevCommitOperationAction 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<RevCommit> selection);
  64
  65         /**
  66          * @return the name of the execution Job
  67          */
  68         protected abstract String getJobName();
  69
  70         /**
  71          * A method to invoke when the operation is finished.
  72          * The method is called outside the UI thread.
  73          */
  74         protected void postOperation() {
  75                 // Empty
  76         }
  77
  78         public void run(final IAction act) {
  79                 op = createOperation(getSelectedCommits());
  80                 if(op==null)
  81                         return;
  82                 String jobname = getJobName();
  83                 Job job = new Job(jobname) {
  84                         @Override
  85                         protected IStatus run(IProgressMonitor monitor) {
  86                                 try {
  87                                         op.execute(monitor);
  88                                         postOperation();
  89                                 } catch (CoreException e) {
  90                                         return Activator.createErrorStatus(e.getStatus()
  91                                                         .getMessage(), e);
  92                                 }
  93                                 return Status.OK_STATUS;
  94                         }
  95                 };
  96                 job.setUser(true);
  97                 job.setRule(op.getSchedulingRule());
  98                 job.schedule();
  99         }
 100
 101         private List<RevCommit> getSelectedCommits() {
 102                 List<RevCommit> commits = new ArrayList<RevCommit>();
 103                 for(Object object: selection) {
 104                         if(object instanceof RevCommit)
 105                                 commits.add((RevCommit) object);
 106                 }
 107                 return commits;
 108         }
 109
 110         /**
 111          * Find out which repository is involved here
 112          *
 113          * @return the Git repository associated with the selected RevObject
 114          */
 115         protected Repository getActiveRepository() {
 116                 RevObjectSelectionProvider selectionProvider = (RevObjectSelectionProvider) wp
 117                                 .getSite().getSelectionProvider();
 118                 return selectionProvider.getActiveRepository();
 119         }
 120 }