org.spearce.egit.ui/src/org/spearce/egit/ui/internal/decorators/GitDocument.java

   1 /*******************************************************************************
   2  * Copyright (C) 2008, Robin Rosenberg <robin.rosenberg@dewire.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  * See LICENSE for the full license text, also available.
   7  *******************************************************************************/
   8 package org.spearce.egit.ui.internal.decorators;
   9
  10 import java.io.IOException;
  11
  12 import org.eclipse.core.resources.IProject;
  13 import org.eclipse.core.resources.IResource;
  14 import org.eclipse.jface.text.Document;
  15 import org.eclipse.team.core.RepositoryProvider;
  16 import org.spearce.egit.core.GitProvider;
  17 import org.spearce.egit.core.project.RepositoryMapping;
  18 import org.spearce.egit.ui.Activator;
  19 import org.spearce.jgit.lib.Constants;
  20 import org.spearce.jgit.lib.IndexChangedEvent;
  21 import org.spearce.jgit.lib.ObjectLoader;
  22 import org.spearce.jgit.lib.RefsChangedEvent;
  23 import org.spearce.jgit.lib.Repository;
  24 import org.spearce.jgit.lib.RepositoryListener;
  25 import org.spearce.jgit.lib.Tree;
  26 import org.spearce.jgit.lib.TreeEntry;
  27
  28 class GitDocument extends Document implements RepositoryListener {
  29         private final IResource resource;
  30
  31         static GitDocument create(final IResource resource) throws IOException {
  32                 GitDocument ret = null;
  33                 if (RepositoryProvider.getProvider(resource.getProject()) instanceof GitProvider) {
  34                         ret = new GitDocument(resource);
  35                         ret.populate();
  36                 }
  37                 return ret;
  38         }
  39
  40         private GitDocument(IResource resource) {
  41                 this.resource = resource;
  42                 GitQuickDiffProvider.doc2repo.put(this, getRepository());
  43         }
  44
  45         void populate() throws IOException {
  46                 set("");
  47                 final IProject project = resource.getProject();
  48                 RepositoryMapping mapping = RepositoryMapping.getMapping(project);
  49                 if (mapping == null)
  50                         return;
  51                 final String gitPath = mapping.getRepoRelativePath(resource);
  52                 final Repository repository = getRepository();
  53                 repository.addRepositoryChangedListener(this);
  54                 String baseline = GitQuickDiffProvider.baseline.get(repository);
  55                 if (baseline == null)
  56                         baseline = Constants.HEAD;
  57                 Tree baselineTree = repository.mapTree(baseline);
  58                 if (baselineTree == null) {
  59                         Activator.logError("Could not resolve quickdiff baseline "
  60                                         + baseline + " corresponding to " + resource + " in "
  61                                         + repository, new Throwable());
  62                         return;
  63                 }
  64                 TreeEntry blobEnry = baselineTree.findBlobMember(gitPath);
  65                 if (blobEnry != null) {
  66                         Activator.trace("(GitQuickDiffProvider) compareTo: " + baseline);
  67                         ObjectLoader loader = repository.openBlob(blobEnry.getId());
  68                         byte[] bytes = loader.getBytes();
  69                         String s = new String(bytes); // FIXME Platform default charset. should be Eclipse default
  70                         set(s);
  71                         Activator.trace("(GitQuickDiffProvider) has reference doc, size=" + s.length() + " bytes");
  72                 } else {
  73                         Activator.trace("(GitQuickDiffProvider) no revision.");
  74                 }
  75         }
  76
  77         void dispose() {
  78                 Repository repository = getRepository();
  79                 if (repository != null)
  80                         repository.removeRepositoryChangedListener(this);
  81         }
  82
  83         public void refsChanged(final RefsChangedEvent e) {
  84                 try {
  85                         populate();
  86                 } catch (IOException e1) {
  87                         Activator.logError("Failed to refresh quickdiff", e1);
  88                 }
  89         }
  90
  91         public void indexChanged(final IndexChangedEvent e) {
  92                 // Index not relevant at this moment
  93         }
  94
  95         private Repository getRepository() {
  96                 IProject project = resource.getProject();
  97                 RepositoryMapping mapping = RepositoryMapping.getMapping(project);
  98                 if (mapping != null)
  99                         return mapping.getRepository();
 100                 return null;
 101         }
 102 }