plugins/svn4idea/src/org/jetbrains/idea/svn/diff/FileWithBranchComparer.java

/*
 * Copyright 2000-2013 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 org.jetbrains.idea.svn.diff;

import com.intellij.openapi.diff.DiffManager;
import com.intellij.openapi.diff.FileContent;
import com.intellij.openapi.diff.SimpleContent;
import com.intellij.openapi.diff.SimpleDiffRequest;
import com.intellij.openapi.progress.ProgressIndicator;
import com.intellij.openapi.progress.ProgressManager;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Ref;
import com.intellij.openapi.vcs.VcsException;
import com.intellij.openapi.vfs.CharsetToolkit;
import com.intellij.openapi.vfs.VirtualFile;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.idea.svn.SvnBundle;
import org.jetbrains.idea.svn.SvnUtil;
import org.tmatesoft.svn.core.SVNException;
import org.tmatesoft.svn.core.wc.SVNRevision;
import org.tmatesoft.svn.core.wc2.SvnTarget;

/**
* @author Konstantin Kolosovsky.
*/
public class FileWithBranchComparer extends ElementWithBranchComparer {

  @NotNull private final Ref<byte[]> content = new Ref<byte[]>();
  @NotNull private final StringBuilder remoteTitleBuilder = new StringBuilder();
  @NotNull private final Ref<Boolean> success = new Ref<Boolean>();

  public FileWithBranchComparer(@NotNull Project project,
                                @NotNull VirtualFile virtualFile,
                                @NotNull String branchUrl,
                                long branchRevision) {
    super(project, virtualFile, branchUrl, branchRevision);
  }

  @Override
  protected void beforeCompare() {
    final ProgressIndicator indicator = ProgressManager.getInstance().getProgressIndicator();
    if (indicator != null) {
      indicator.setIndeterminate(true);
    }
  }

  @Override
  protected void compare() throws SVNException, VcsException {
    remoteTitleBuilder.append(myElementUrl);
    content.set(SvnUtil.getFileContents(myVcs, SvnTarget.fromURL(myElementUrl), SVNRevision.HEAD, SVNRevision.UNDEFINED));
    success.set(true);
  }

  @Override
  protected void showResult() {
    if (!success.isNull()) {
      SimpleDiffRequest req = new SimpleDiffRequest(myProject, SvnBundle.message("compare.with.branch.diff.title"));
      req.setContents(new SimpleContent(CharsetToolkit.bytesToString(content.get(), myVirtualFile.getCharset())),
                      new FileContent(myProject, myVirtualFile));
      req.setContentTitles(remoteTitleBuilder.toString(), myVirtualFile.getPresentableUrl());
      DiffManager.getInstance().getDiffTool().show(req);
    }
  }

  @Override
  public String getTitle() {
    return SvnBundle.message("compare.with.branch.progress.loading.content");
  }
}