Rafael Cavazin
2013-07-21 f66e89662c091e082bd1d2feb6ac91513ccff273
src/main/java/com/gitblit/wicket/pages/BlamePage.java
New file
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/*
 * Copyright 2011 gitblit.com.
 *
 * 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.gitblit.wicket.pages;
import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.List;
import org.apache.wicket.PageParameters;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.ListDataProvider;
import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.revwalk.RevCommit;
import com.gitblit.GitBlit;
import com.gitblit.Keys;
import com.gitblit.models.AnnotatedLine;
import com.gitblit.models.PathModel;
import com.gitblit.utils.DiffUtils;
import com.gitblit.utils.JGitUtils;
import com.gitblit.utils.StringUtils;
import com.gitblit.wicket.CacheControl;
import com.gitblit.wicket.CacheControl.LastModified;
import com.gitblit.wicket.WicketUtils;
import com.gitblit.wicket.panels.CommitHeaderPanel;
import com.gitblit.wicket.panels.LinkPanel;
import com.gitblit.wicket.panels.PathBreadcrumbsPanel;
@CacheControl(LastModified.BOOT)
public class BlamePage extends RepositoryPage {
   public BlamePage(PageParameters params) {
      super(params);
      final String blobPath = WicketUtils.getPath(params);
      RevCommit commit = getCommit();
      add(new BookmarkablePageLink<Void>("blobLink", BlobPage.class,
            WicketUtils.newPathParameter(repositoryName, objectId, blobPath)));
      add(new BookmarkablePageLink<Void>("commitLink", CommitPage.class,
            WicketUtils.newObjectParameter(repositoryName, objectId)));
      add(new BookmarkablePageLink<Void>("commitDiffLink", CommitDiffPage.class,
            WicketUtils.newObjectParameter(repositoryName, objectId)));
      // blame page links
      add(new BookmarkablePageLink<Void>("headLink", BlamePage.class,
            WicketUtils.newPathParameter(repositoryName, Constants.HEAD, blobPath)));
      add(new BookmarkablePageLink<Void>("historyLink", HistoryPage.class,
            WicketUtils.newPathParameter(repositoryName, objectId, blobPath)));
      add(new CommitHeaderPanel("commitHeader", repositoryName, commit));
      add(new PathBreadcrumbsPanel("breadcrumbs", repositoryName, blobPath, objectId));
      String format = GitBlit.getString(Keys.web.datetimestampLongFormat,
            "EEEE, MMMM d, yyyy HH:mm Z");
      final DateFormat df = new SimpleDateFormat(format);
      df.setTimeZone(getTimeZone());
      PathModel pathModel = null;
      List<PathModel> paths = JGitUtils.getFilesInPath(getRepository(), StringUtils.getRootPath(blobPath), commit);
      for (PathModel path : paths) {
         if (path.path.equals(blobPath)) {
            pathModel = path;
            break;
         }
      }
      if (pathModel == null) {
         add(new Label("annotation").setVisible(false));
         add(new Label("missingBlob", missingBlob(blobPath, commit)).setEscapeModelStrings(false));
         return;
      }
      add(new Label("missingBlob").setVisible(false));
      List<AnnotatedLine> lines = DiffUtils.blame(getRepository(), blobPath, objectId);
      ListDataProvider<AnnotatedLine> blameDp = new ListDataProvider<AnnotatedLine>(lines);
      DataView<AnnotatedLine> blameView = new DataView<AnnotatedLine>("annotation", blameDp) {
         private static final long serialVersionUID = 1L;
         private int count;
         private String lastCommitId = "";
         private boolean showInitials = true;
         private String zeroId = ObjectId.zeroId().getName();
         public void populateItem(final Item<AnnotatedLine> item) {
            AnnotatedLine entry = item.getModelObject();
            item.add(new Label("line", "" + entry.lineNumber));
            item.add(new Label("data", StringUtils.escapeForHtml(entry.data, true))
                  .setEscapeModelStrings(false));
            if (!lastCommitId.equals(entry.commitId)) {
               lastCommitId = entry.commitId;
               count++;
               if (zeroId.equals(entry.commitId)) {
                  // unknown commit
                  item.add(new Label("commit", "<?>"));
                  showInitials = false;
               } else {
                  // show the link for first line
                  LinkPanel commitLink = new LinkPanel("commit", null,
                        getShortObjectId(entry.commitId), CommitPage.class,
                        newCommitParameter(entry.commitId));
                  WicketUtils.setHtmlTooltip(commitLink,
                        MessageFormat.format("{0}, {1}", entry.author, df.format(entry.when)));
                  item.add(commitLink);
                  showInitials = true;
               }
            } else {
               if (showInitials) {
                  showInitials = false;
                  // show author initials
                  item.add(new Label("commit", getInitials(entry.author)));
               } else {
                  // hide the commit link until the next block
                  item.add(new Label("commit").setVisible(false));
               }
            }
            if (count % 2 == 0) {
               WicketUtils.setCssClass(item, "even");
            } else {
               WicketUtils.setCssClass(item, "odd");
            }
         }
      };
      add(blameView);
   }
   private String getInitials(String author) {
      StringBuilder sb = new StringBuilder();
      String[] chunks = author.split(" ");
      for (String chunk : chunks) {
         sb.append(chunk.charAt(0));
      }
      return sb.toString().toUpperCase();
   }
   @Override
   protected String getPageName() {
      return getString("gb.blame");
   }
   @Override
   protected Class<? extends BasePage> getRepoNavPageClass() {
      return TreePage.class;
   }
   protected String missingBlob(String blobPath, RevCommit commit) {
      StringBuilder sb = new StringBuilder();
      sb.append("<div class=\"alert alert-error\">");
      String pattern = getString("gb.doesNotExistInTree").replace("{0}", "<b>{0}</b>").replace("{1}", "<b>{1}</b>");
      sb.append(MessageFormat.format(pattern, blobPath, commit.getTree().getId().getName()));
      sb.append("</div>");
      return sb.toString();
   }
}