org.eclipse.egit.ui/src/org/eclipse/egit/ui/internal/decorators/GitQuickDiffProvider.java

   1 /*******************************************************************************
   2  * Copyright (C) 2007, 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.decorators;
  11
  12 import java.io.IOException;
  13 import java.util.Map;
  14 import java.util.WeakHashMap;
  15
  16 import org.eclipse.core.resources.IResource;
  17 import org.eclipse.core.runtime.CoreException;
  18 import org.eclipse.core.runtime.IProgressMonitor;
  19 import org.eclipse.egit.ui.Activator;
  20 import org.eclipse.egit.ui.UIText;
  21 import org.eclipse.jface.text.IDocument;
  22 import org.eclipse.team.core.RepositoryProvider;
  23 import org.eclipse.ui.IEditorInput;
  24 import org.eclipse.ui.ide.ResourceUtil;
  25 import org.eclipse.ui.texteditor.ITextEditor;
  26 import org.eclipse.ui.texteditor.quickdiff.IQuickDiffReferenceProvider;
  27 import org.eclipse.jgit.lib.Repository;
  28
  29 /**
  30  * This class provides input for the Eclipse Quick Diff feature.
  31  */
  32 public class GitQuickDiffProvider implements IQuickDiffReferenceProvider {
  33
  34         private String id;
  35
  36         private GitDocument document;
  37
  38         private IResource resource;
  39
  40         static Map<Repository,String> baseline = new WeakHashMap<Repository,String>();
  41
  42         /**
  43          * Create the GitQuickDiffProvider instance
  44          */
  45         public GitQuickDiffProvider() {
  46                 Activator.trace("(GitQuickDiffProvider) constructor");
  47                 // Empty
  48         }
  49
  50         public void dispose() {
  51                 Activator.trace("(GitQuickDiffProvider) dispose");
  52                 if (document != null)
  53                         document.dispose();
  54         }
  55
  56         public String getId() {
  57                 return id;
  58         }
  59
  60         public IDocument getReference(IProgressMonitor monitor)
  61                         throws CoreException {
  62                 Activator.trace("(GitQuickDiffProvider) file: " + resource);
  63                 if (resource == null)
  64                         return null;
  65                 RepositoryProvider provider = RepositoryProvider.getProvider(resource
  66                                 .getProject());
  67                 if (provider != null) {
  68                         try {
  69                                 document = GitDocument.create(resource);
  70                         } catch (IOException e) {
  71                                 Activator.error(UIText.QuickDiff_failedLoading, e);
  72                         }
  73                         return document;
  74                 } else {
  75                         return null;
  76                 }
  77         }
  78
  79         public boolean isEnabled() {
  80                 return true;
  81         }
  82
  83         public void setActiveEditor(ITextEditor editor) {
  84                 Activator.trace("(GitQuickDiffProvider) setActiveEditor: " + editor.getTitle());
  85                 IEditorInput editorInput = editor.getEditorInput();
  86                 resource = ResourceUtil.getResource(editorInput);
  87         }
  88
  89         public void setId(String id) {
  90                 this.id = id;
  91         }
  92
  93         /**
  94          * Set a new baseline for quickdiff
  95          *
  96          * @param repository
  97          * @param baseline any commit reference, ref, symref or sha-1
  98          * @throws IOException
  99          */
 100         public static void setBaselineReference(final Repository repository, final String baseline) throws IOException {
 101                 GitQuickDiffProvider.baseline.put(repository, baseline);
 102                 GitDocument.refreshRelevant(repository);
 103         }
 104
 105 }