Paul Martin
2016-04-06 5bb79fbb553a11e6582392f658233cf58a4ceb11
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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.io.OutputStream;
import java.util.ArrayList;
import java.util.Arrays;
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.html.link.ExternalLink;
import org.apache.wicket.markup.html.link.Link;
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.apache.wicket.request.target.resource.ResourceStreamRequestTarget;
import org.apache.wicket.util.resource.AbstractResourceStreamWriter;
import org.apache.wicket.util.resource.IResourceStream;
import org.eclipse.jgit.diff.DiffEntry.ChangeType;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
 
import com.gitblit.Constants;
import com.gitblit.Keys;
import com.gitblit.models.GitNote;
import com.gitblit.models.PathModel.PathChangeModel;
import com.gitblit.models.SubmoduleModel;
import com.gitblit.models.UserModel;
import com.gitblit.servlet.RawServlet;
import com.gitblit.utils.DiffUtils;
import com.gitblit.utils.DiffUtils.DiffComparator;
import com.gitblit.utils.DiffUtils.DiffOutput;
import com.gitblit.utils.DiffUtils.DiffOutputType;
import com.gitblit.utils.JGitUtils;
import com.gitblit.wicket.CacheControl;
import com.gitblit.wicket.GitBlitWebSession;
import com.gitblit.wicket.CacheControl.LastModified;
import com.gitblit.wicket.WicketUtils;
import com.gitblit.wicket.panels.CommitHeaderPanel;
import com.gitblit.wicket.panels.CommitLegendPanel;
import com.gitblit.wicket.panels.DiffStatPanel;
import com.gitblit.wicket.panels.AvatarImage;
import com.gitblit.wicket.panels.LinkPanel;
import com.gitblit.wicket.panels.RefsPanel;
 
@CacheControl(LastModified.BOOT)
public class CommitDiffPage extends RepositoryPage {
 
    public CommitDiffPage(PageParameters params) {
        super(params);
 
        final Repository r = getRepository();
        final RevCommit commit = getCommit();
        final DiffComparator diffComparator = WicketUtils.getDiffComparator(params);
 
        List<String> parents = new ArrayList<String>();
        if (commit.getParentCount() > 0) {
            for (RevCommit parent : commit.getParents()) {
                parents.add(parent.name());
            }
        }
 
        // commit page links
        if (parents.size() == 0) {
            add(new Label("parentLink", getString("gb.none")));
        } else {
            add(new LinkPanel("parentLink", null, parents.get(0).substring(0, 8),
                    CommitDiffPage.class, newCommitParameter(parents.get(0))));
        }
        add(new BookmarkablePageLink<Void>("patchLink", PatchPage.class,
                WicketUtils.newObjectParameter(repositoryName, objectId)));
        add(new BookmarkablePageLink<Void>("commitLink", CommitPage.class,
                WicketUtils.newObjectParameter(repositoryName, objectId)));
        add(new LinkPanel("whitespaceLink", null, getString(diffComparator.getOpposite().getTranslationKey()),
                CommitDiffPage.class, WicketUtils.newDiffParameter(repositoryName, objectId, diffComparator.getOpposite())));
 
        add(new CommitHeaderPanel("commitHeader", repositoryName, commit));
 
        final List<String> imageExtensions = app().settings().getStrings(Keys.web.imageExtensions);
        final ImageDiffHandler handler = new ImageDiffHandler(this, repositoryName,
                parents.isEmpty() ? null : parents.get(0), commit.getName(), imageExtensions);
        final int tabLength = app().settings().getInteger(Keys.web.tabLength, 4);
        final DiffOutput diff = DiffUtils.getCommitDiff(r, commit, diffComparator, DiffOutputType.HTML, handler, tabLength);
        if (handler.getImgDiffCount() > 0) {
            addBottomScript("scripts/imgdiff.js"); // Tiny support script for image diffs
        }
 
        // add commit diffstat
        int insertions = 0;
        int deletions = 0;
        for (PathChangeModel pcm : diff.stat.paths) {
            insertions += pcm.insertions;
            deletions += pcm.deletions;
        }
        add(new DiffStatPanel("diffStat", insertions, deletions));
 
        addFullText("fullMessage", commit.getFullMessage());
 
        // git notes
        List<GitNote> notes = JGitUtils.getNotesOnCommit(r, commit);
        ListDataProvider<GitNote> notesDp = new ListDataProvider<GitNote>(notes);
        DataView<GitNote> notesView = new DataView<GitNote>("notes", notesDp) {
            private static final long serialVersionUID = 1L;
 
            @Override
            public void populateItem(final Item<GitNote> item) {
                GitNote entry = item.getModelObject();
                item.add(new RefsPanel("refName", repositoryName, Arrays.asList(entry.notesRef)));
                item.add(createPersonPanel("authorName", entry.notesRef.getAuthorIdent(),
                        Constants.SearchType.AUTHOR));
                item.add(new AvatarImage("noteAuthorAvatar", entry.notesRef.getAuthorIdent()));
                item.add(WicketUtils.createTimestampLabel("authorDate", entry.notesRef
                        .getAuthorIdent().getWhen(), getTimeZone(), getTimeUtils()));
                item.add(new Label("noteContent", bugtraqProcessor().processPlainCommitMessage(getRepository(), repositoryName,
                        entry.content)).setEscapeModelStrings(false));
            }
        };
        add(notesView.setVisible(notes.size() > 0));
 
        // changed paths list
        add(new CommitLegendPanel("commitLegend", diff.stat.paths));
        ListDataProvider<PathChangeModel> pathsDp = new ListDataProvider<PathChangeModel>(diff.stat.paths);
        DataView<PathChangeModel> pathsView = new DataView<PathChangeModel>("changedPath", pathsDp) {
            private static final long serialVersionUID = 1L;
            int counter;
 
            @Override
            public void populateItem(final Item<PathChangeModel> item) {
                final PathChangeModel entry = item.getModelObject();
                
                Label changeType = new Label("changeType", "");
                WicketUtils.setChangeTypeCssClass(changeType, entry.changeType);
                setChangeTypeTooltip(changeType, entry.changeType);
                item.add(changeType);
                item.add(new DiffStatPanel("diffStat", entry.insertions, entry.deletions, true));
                item.add(WicketUtils.setHtmlTooltip(new Label("filestore", ""), getString("gb.filestore"))
                                    .setVisible(entry.isFilestoreItem()));
 
                boolean hasSubmodule = false;
                String submodulePath = null;
                
                if (entry.isTree()) {
                    // tree
                    item.add(new LinkPanel("pathName", null, entry.path, TreePage.class,
                            WicketUtils
                                    .newPathParameter(repositoryName, entry.commitId, entry.path)));
                } else if (entry.isSubmodule()) {
                    // submodule
                    String submoduleId = entry.objectId;
                    SubmoduleModel submodule = getSubmodule(entry.path);
                    submodulePath = submodule.gitblitPath;
                    hasSubmodule = submodule.hasSubmodule;
 
                    // add relative link
                    item.add(new LinkPanel("pathName", "list", entry.path + " @ " + getShortObjectId(submoduleId), "#n" + entry.objectId));
                } else {
                    // add relative link
                    if (entry.isFilestoreItem()) {
                    
                        item.add(new LinkPanel("pathName", "list", entry.path, new Link<Object>("link", null) {
                             
                            private static final long serialVersionUID = 1L;
 
                            @Override
                            public void onClick() {
                                IResourceStream resourceStream = new AbstractResourceStreamWriter() {
                                                                             
                                    private static final long serialVersionUID = 1L;
    
                                    @Override 
                                    public void write(OutputStream output) {
                                        UserModel user =  GitBlitWebSession.get().getUser();
                                        user = user == null ? UserModel.ANONYMOUS : user;
                                            
                                        app().filestore().downloadBlob(entry.getFilestoreOid(), user, getRepositoryModel(), output);
                                    }
                                };
                                
                                getRequestCycle().setRequestTarget(new ResourceStreamRequestTarget(resourceStream, entry.path));
                            }}));
                    }
                    else
                    {
                        item.add(new LinkPanel("pathName", "list", entry.path, "#n" + entry.objectId));
                    }
                }
 
                // quick links
                if (entry.isSubmodule()) {
                    item.add(new ExternalLink("raw", "").setEnabled(false));
                    // submodule
                    item.add(new ExternalLink("patch", "").setEnabled(false));
                    item.add(new BookmarkablePageLink<Void>("view", CommitPage.class, WicketUtils
                            .newObjectParameter(submodulePath, entry.objectId)).setEnabled(hasSubmodule));
                    item.add(new ExternalLink("blame", "").setEnabled(false));
                    item.add(new BookmarkablePageLink<Void>("history", HistoryPage.class, WicketUtils
                            .newPathParameter(repositoryName, entry.commitId, entry.path))
                            .setEnabled(!entry.changeType.equals(ChangeType.ADD)));
                } else {
                    // tree or blob
                    item.add(new BookmarkablePageLink<Void>("patch", PatchPage.class, WicketUtils
                            .newPathParameter(repositoryName, entry.commitId, entry.path))
                            .setEnabled(!entry.changeType.equals(ChangeType.ADD)
                                    && !entry.changeType.equals(ChangeType.DELETE)));
                    
                    if (entry.isFilestoreItem()) {
                        item.add(new Link<Object>("view", null) {
                             
                            private static final long serialVersionUID = 1L;
 
                            @Override
                            public void onClick() {
                         
                                 IResourceStream resourceStream = new AbstractResourceStreamWriter() {
                                                                             
                                    private static final long serialVersionUID = 1L;
 
                                    @Override 
                                      public void write(OutputStream output) {
                                            UserModel user =  GitBlitWebSession.get().getUser();
                                         user = user == null ? UserModel.ANONYMOUS : user;
                                            
                                        app().filestore().downloadBlob(entry.getFilestoreOid(), user, getRepositoryModel(), output);
                                      }
                                  };
                                      
                                
                                getRequestCycle().setRequestTarget(new ResourceStreamRequestTarget(resourceStream, entry.path));
                            }});
                        
                        item.add(new Link<Object>("raw", null) {
                             
                            private static final long serialVersionUID = 1L;
 
                            @Override
                            public void onClick() {
                         
                                 IResourceStream resourceStream = new AbstractResourceStreamWriter() {
                                                                             
                                    private static final long serialVersionUID = 1L;
 
                                    @Override 
                                      public void write(OutputStream output) {
                                            UserModel user =  GitBlitWebSession.get().getUser();
                                         user = user == null ? UserModel.ANONYMOUS : user;
                                            
                                        app().filestore().downloadBlob(entry.getFilestoreOid(), user, getRepositoryModel(), output);
                                      }
                                  };
                                      
                                
                                getRequestCycle().setRequestTarget(new ResourceStreamRequestTarget(resourceStream, entry.path));
                            }});
                    } else {
                        item.add(new BookmarkablePageLink<Void>("view", BlobPage.class, WicketUtils
                                .newPathParameter(repositoryName, entry.commitId, entry.path))
                                .setEnabled(!entry.changeType.equals(ChangeType.DELETE)));
                        
                        item.add(new ExternalLink("raw", RawServlet.asLink(getContextUrl(), repositoryName, entry.commitId, entry.path))
                                .setEnabled(!entry.changeType.equals(ChangeType.DELETE)));
                    }
                    
                    item.add(new BookmarkablePageLink<Void>("blame", BlamePage.class, WicketUtils
                            .newPathParameter(repositoryName, entry.commitId, entry.path))
                            .setEnabled(!entry.changeType.equals(ChangeType.ADD)
                                    && !entry.changeType.equals(ChangeType.DELETE)));
                    item.add(new BookmarkablePageLink<Void>("history", HistoryPage.class, WicketUtils
                            .newPathParameter(repositoryName, entry.commitId, entry.path))
                            .setEnabled(!entry.changeType.equals(ChangeType.ADD)));
                }
 
                WicketUtils.setAlternatingBackground(item, counter);
                counter++;
            }
        };
        add(pathsView);
        add(new Label("diffText", diff.content).setEscapeModelStrings(false));
    }
 
    @Override
    protected String getPageName() {
        return getString("gb.commitdiff");
    }
 
    @Override
    protected boolean isCommitPage() {
        return true;
    }
 
    @Override
    protected Class<? extends BasePage> getRepoNavPageClass() {
        return LogPage.class;
    }
}