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.core.internal.trace.GitTraceLocation;
  20 import org.eclipse.egit.ui.Activator;
  21 import org.eclipse.egit.ui.UIText;
  22 import org.eclipse.jface.text.IDocument;
  23 import org.eclipse.team.core.RepositoryProvider;
  24 import org.eclipse.ui.IEditorInput;
  25 import org.eclipse.ui.ide.ResourceUtil;
  26 import org.eclipse.ui.texteditor.ITextEditor;
  27 import org.eclipse.ui.texteditor.quickdiff.IQuickDiffReferenceProvider;
  28 import org.eclipse.jgit.lib.Repository;
  29
  30 /**
  31  * This class provides input for the Eclipse Quick Diff feature.
  32  */
  33 public class GitQuickDiffProvider implements IQuickDiffReferenceProvider {
  34
  35         private String id;
  36
  37         private GitDocument document;
  38
  39         private IResource resource;
  40
  41         static Map<Repository,String> baseline = new WeakHashMap<Repository,String>();
  42
  43         /**
  44          * Create the GitQuickDiffProvider instance
  45          */
  46         public GitQuickDiffProvider() {
  47                 // TODO is this the right location?
  48                 if (GitTraceLocation.UI.isActive())
  49                         GitTraceLocation.getTrace().traceEntry(GitTraceLocation.UI.getLocation());
  50                 // Empty
  51         }
  52
  53         public void dispose() {
  54                 // TODO is this the right location?
  55                 if (GitTraceLocation.UI.isActive())
  56                         GitTraceLocation.getTrace().traceEntry(GitTraceLocation.UI.getLocation());
  57                 if (document != null)
  58                         document.dispose();
  59         }
  60
  61         public String getId() {
  62                 return id;
  63         }
  64
  65         public IDocument getReference(IProgressMonitor monitor)
  66                         throws CoreException {
  67                 // TODO is this the right location?
  68                 if (GitTraceLocation.UI.isActive())
  69                         GitTraceLocation.getTrace().trace(
  70                                         GitTraceLocation.UI.getLocation(),
  71                                         "(GitQuickDiffProvider) file: " + resource); //$NON-NLS-1$
  72                 if (resource == null)
  73                         return null;
  74                 RepositoryProvider provider = RepositoryProvider.getProvider(resource
  75                                 .getProject());
  76                 if (provider != null) {
  77                         try {
  78                                 document = GitDocument.create(resource);
  79                         } catch (IOException e) {
  80                                 Activator.error(UIText.QuickDiff_failedLoading, e);
  81                         }
  82                         return document;
  83                 } else {
  84                         return null;
  85                 }
  86         }
  87
  88         public boolean isEnabled() {
  89                 return true;
  90         }
  91
  92         public void setActiveEditor(ITextEditor editor) {
  93                 // TODO is this the right location?
  94                 if (GitTraceLocation.UI.isActive())
  95                         GitTraceLocation.getTrace().traceEntry(
  96                                         GitTraceLocation.UI.getLocation(), editor.getTitle());
  97                 IEditorInput editorInput = editor.getEditorInput();
  98                 resource = ResourceUtil.getResource(editorInput);
  99         }
 100
 101         public void setId(String id) {
 102                 this.id = id;
 103         }
 104
 105         /**
 106          * Set a new baseline for quickdiff
 107          *
 108          * @param repository
 109          * @param baseline any commit reference, ref, symref or sha-1
 110          * @throws IOException
 111          */
 112         public static void setBaselineReference(final Repository repository, final String baseline) throws IOException {
 113                 GitQuickDiffProvider.baseline.put(repository, baseline);
 114                 GitDocument.refreshRelevant(repository);
 115         }
 116
 117 }