org.spearce.egit.ui/src/org/spearce/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  * See LICENSE for the full license text, also available.
   8  *******************************************************************************/
   9 package org.spearce.egit.ui.internal.decorators;
  10
  11 import java.io.IOException;
  12 import java.util.Map;
  13 import java.util.WeakHashMap;
  14
  15 import org.eclipse.core.resources.IResource;
  16 import org.eclipse.core.runtime.CoreException;
  17 import org.eclipse.core.runtime.IProgressMonitor;
  18 import org.eclipse.jface.text.IDocument;
  19 import org.eclipse.team.core.RepositoryProvider;
  20 import org.eclipse.ui.IEditorInput;
  21 import org.eclipse.ui.ide.ResourceUtil;
  22 import org.eclipse.ui.texteditor.ITextEditor;
  23 import org.eclipse.ui.texteditor.quickdiff.IQuickDiffReferenceProvider;
  24 import org.spearce.egit.ui.Activator;
  25 import org.spearce.egit.ui.UIText;
  26 import org.spearce.jgit.lib.Repository;
  27
  28 /**
  29  * This class provides input for the Eclipse Quick Diff feature.
  30  */
  31 public class GitQuickDiffProvider implements IQuickDiffReferenceProvider {
  32
  33         private String id;
  34
  35         private GitDocument document;
  36
  37         private IResource resource;
  38
  39         static Map<Repository,String> baseline = new WeakHashMap<Repository,String>();
  40
  41         /**
  42          * Create the GitQuickDiffProvider instance
  43          */
  44         public GitQuickDiffProvider() {
  45                 Activator.trace("(GitQuickDiffProvider) constructor");
  46                 // Empty
  47         }
  48
  49         public void dispose() {
  50                 Activator.trace("(GitQuickDiffProvider) dispose");
  51                 if (document != null)
  52                         document.dispose();
  53         }
  54
  55         public String getId() {
  56                 return id;
  57         }
  58
  59         public IDocument getReference(IProgressMonitor monitor)
  60                         throws CoreException {
  61                 Activator.trace("(GitQuickDiffProvider) file: " + resource);
  62                 if (resource == null)
  63                         return null;
  64                 RepositoryProvider provider = RepositoryProvider.getProvider(resource
  65                                 .getProject());
  66                 if (provider != null) {
  67                         try {
  68                                 document = GitDocument.create(resource);
  69                         } catch (IOException e) {
  70                                 Activator.error(UIText.QuickDiff_failedLoading, e);
  71                         }
  72                         return document;
  73                 } else {
  74                         return null;
  75                 }
  76         }
  77
  78         public boolean isEnabled() {
  79                 return true;
  80         }
  81
  82         public void setActiveEditor(ITextEditor editor) {
  83                 Activator.trace("(GitQuickDiffProvider) setActiveEditor: " + editor.getTitle());
  84                 IEditorInput editorInput = editor.getEditorInput();
  85                 resource = ResourceUtil.getResource(editorInput);
  86         }
  87
  88         public void setId(String id) {
  89                 this.id = id;
  90         }
  91
  92         /**
  93          * Set a new baseline for quickdiff
  94          *
  95          * @param repository
  96          * @param baseline any commit reference, ref, symref or sha-1
  97          * @throws IOException
  98          */
  99         public static void setBaselineReference(final Repository repository, final String baseline) throws IOException {
 100                 GitQuickDiffProvider.baseline.put(repository, baseline);
 101                 GitDocument.refreshRelevant(repository);
 102         }
 103
 104 }