| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.intellij.openapi.vcs.changes; |
| |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Pair; |
| import com.intellij.openapi.vcs.*; |
| import com.intellij.openapi.vcs.diff.DiffProvider; |
| import com.intellij.openapi.vcs.history.VcsRevisionNumber; |
| import com.intellij.openapi.vcs.impl.ContentRevisionCache; |
| import com.intellij.openapi.vcs.impl.CurrentRevisionProvider; |
| import com.intellij.openapi.vfs.VirtualFile; |
| import com.intellij.openapi.vfs.encoding.EncodingManager; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.io.IOException; |
| import java.nio.charset.Charset; |
| |
| /** |
| * @author yole |
| */ |
| public class VcsCurrentRevisionProxy implements ContentRevision { |
| private final DiffProvider myDiffProvider; |
| private final VirtualFile myFile; |
| private final Project myProject; |
| private final VcsKey myVcsKey; |
| |
| @Nullable |
| public static VcsCurrentRevisionProxy create(final VirtualFile file, final Project project, final VcsKey vcsKey) { |
| final AbstractVcs vcs = ProjectLevelVcsManager.getInstance(project).findVcsByName(vcsKey.getName()); |
| if (vcs != null) { |
| final DiffProvider diffProvider = vcs.getDiffProvider(); |
| if (diffProvider != null) { |
| return new VcsCurrentRevisionProxy(diffProvider, file, project, vcsKey); |
| } |
| } |
| return null; |
| } |
| |
| private VcsCurrentRevisionProxy(final DiffProvider diffProvider, final VirtualFile file, final Project project, final VcsKey vcsKey) { |
| myDiffProvider = diffProvider; |
| myFile = file; |
| myProject = project; |
| myVcsKey = vcsKey; |
| } |
| |
| @Nullable |
| public String getContent() throws VcsException { |
| return getVcsRevision().getContent(); |
| } |
| |
| @NotNull |
| public FilePath getFile() { |
| return new FilePathImpl(myFile); |
| } |
| |
| @NotNull |
| public VcsRevisionNumber getRevisionNumber() { |
| try { |
| return getVcsRevision().getRevisionNumber(); |
| } |
| catch(VcsException ex) { |
| return VcsRevisionNumber.NULL; |
| } |
| } |
| |
| private ContentRevision getVcsRevision() throws VcsException { |
| final FilePath file = getFile(); |
| final Pair<VcsRevisionNumber, String> pair; |
| try { |
| pair = ContentRevisionCache.getOrLoadCurrentAsString(myProject, file, myVcsKey, |
| new CurrentRevisionProvider() { |
| @Override |
| public VcsRevisionNumber getCurrentRevision() throws VcsException { |
| return getCurrentRevisionNumber(); |
| } |
| |
| @Override |
| public Pair<VcsRevisionNumber, byte[]> get() throws VcsException, IOException { |
| return loadContent(); |
| } |
| }); |
| } |
| catch (IOException e) { |
| throw new VcsException(e); |
| } |
| |
| return new ContentRevision() { |
| @Override |
| public String getContent() throws VcsException { |
| return pair.getSecond(); |
| } |
| |
| @NotNull |
| @Override |
| public FilePath getFile() { |
| return file; |
| } |
| |
| @NotNull |
| @Override |
| public VcsRevisionNumber getRevisionNumber() { |
| return pair.getFirst(); |
| } |
| }; |
| } |
| |
| private VcsRevisionNumber getCurrentRevisionNumber() throws VcsException { |
| final VcsRevisionNumber currentRevision = myDiffProvider.getCurrentRevision(myFile); |
| if (currentRevision == null) { |
| throw new VcsException("Failed to fetch current revision"); |
| } |
| return currentRevision; |
| } |
| |
| private Pair<VcsRevisionNumber, byte[]> loadContent() throws VcsException { |
| final VcsRevisionNumber currentRevision = getCurrentRevisionNumber(); |
| final ContentRevision contentRevision = myDiffProvider.createFileContent(currentRevision, myFile); |
| if (contentRevision == null) { |
| throw new VcsException("Failed to create content for current revision"); |
| } |
| Charset charset = myFile.getCharset(); |
| charset = charset == null ? EncodingManager.getInstance().getDefaultCharset() : charset; |
| return Pair.create(currentRevision, contentRevision.getContent().getBytes(charset)); |
| } |
| } |