Java tutorial
/******************************************************************************* * Copyright (C) 2010, Mathias Kinzler <mathias.kinzler@sap.com> * * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html *******************************************************************************/ package org.eclipse.egit.ui.internal.history.command; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.compare.ITypedElement; import org.eclipse.core.commands.ExecutionEvent; import org.eclipse.core.commands.ExecutionException; import org.eclipse.core.resources.IFile; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.NullProgressMonitor; import org.eclipse.egit.core.project.RepositoryMapping; import org.eclipse.egit.ui.Activator; import org.eclipse.egit.ui.UIText; import org.eclipse.egit.ui.internal.CompareUtils; import org.eclipse.egit.ui.internal.EgitUiEditorUtils; import org.eclipse.egit.ui.internal.GitCompareFileRevisionEditorInput; import org.eclipse.egit.ui.internal.history.GitHistoryPage; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jgit.lib.Constants; import org.eclipse.jgit.lib.ObjectId; import org.eclipse.jgit.lib.Repository; import org.eclipse.jgit.revwalk.RevCommit; import org.eclipse.jgit.revwalk.RevWalk; import org.eclipse.osgi.util.NLS; import org.eclipse.team.core.history.IFileRevision; import org.eclipse.team.ui.synchronize.SaveableCompareEditorInput; /** * Show versions/open. * <p> * If a single version is selected, open it, otherwise open several versions of * the file content. */ public class ShowVersionsHandler extends AbstractHistoryCommanndHandler { public Object execute(ExecutionEvent event) throws ExecutionException { boolean compareMode = Boolean.TRUE.toString() .equals(event.getParameter(HistoryViewCommands.COMPARE_MODE_PARAM)); IStructuredSelection selection = getSelection(getPage()); if (selection.size() < 1) return null; Object input = getPage().getInputInternal().getSingleFile(); if (input == null) return null; boolean errorOccured = false; List<ObjectId> ids = new ArrayList<ObjectId>(); String gitPath = null; if (input instanceof IFile) { IFile resource = (IFile) input; final RepositoryMapping map = RepositoryMapping.getMapping(resource); gitPath = map.getRepoRelativePath(resource); Iterator<?> it = selection.iterator(); while (it.hasNext()) { RevCommit commit = (RevCommit) it.next(); IFileRevision rev = null; try { rev = CompareUtils.getFileRevision(gitPath, commit, map.getRepository(), null); } catch (IOException e) { Activator.logError(NLS.bind(UIText.GitHistoryPage_errorLookingUpPath, gitPath, commit.getId()), e); errorOccured = true; } if (rev != null) { if (compareMode) { ITypedElement right = CompareUtils.getFileRevisionTypedElement(gitPath, commit, map.getRepository()); final GitCompareFileRevisionEditorInput in = new GitCompareFileRevisionEditorInput( SaveableCompareEditorInput.createFileElement(resource), right, null); try { openInCompare(event, in); } catch (Exception e) { errorOccured = true; } } else { try { EgitUiEditorUtils.openEditor(getPart(event).getSite().getPage(), rev, new NullProgressMonitor()); } catch (CoreException e) { Activator.logError(UIText.GitHistoryPage_openFailed, e); errorOccured = true; } } } else { ids.add(commit.getId()); } } } if (input instanceof File) { File fileInput = (File) input; Repository repo = getRepository(event); gitPath = getRepoRelativePath(repo, fileInput); Iterator<?> it = selection.iterator(); while (it.hasNext()) { RevCommit commit = (RevCommit) it.next(); IFileRevision rev = null; try { rev = CompareUtils.getFileRevision(gitPath, commit, repo, null); } catch (IOException e) { Activator.logError(NLS.bind(UIText.GitHistoryPage_errorLookingUpPath, gitPath, commit.getId()), e); errorOccured = true; } if (rev != null) { if (compareMode) { try { ITypedElement left = CompareUtils.getFileRevisionTypedElement(gitPath, new RevWalk(repo).parseCommit(repo.resolve(Constants.HEAD)), repo); ITypedElement right = CompareUtils.getFileRevisionTypedElement(gitPath, commit, repo); final GitCompareFileRevisionEditorInput in = new GitCompareFileRevisionEditorInput(left, right, null); openInCompare(event, in); } catch (IOException e) { errorOccured = true; } } else { try { EgitUiEditorUtils.openEditor(getPart(event).getSite().getPage(), rev, new NullProgressMonitor()); } catch (CoreException e) { Activator.logError(UIText.GitHistoryPage_openFailed, e); errorOccured = true; } } } else { ids.add(commit.getId()); } } } if (errorOccured) Activator.showError(UIText.GitHistoryPage_openFailed, null); if (ids.size() > 0) { StringBuilder idList = new StringBuilder(""); //$NON-NLS-1$ for (ObjectId objectId : ids) { idList.append(objectId.getName()).append(' '); } MessageDialog.openError(getPart(event).getSite().getShell(), UIText.GitHistoryPage_fileNotFound, NLS.bind(UIText.GitHistoryPage_notContainedInCommits, gitPath, idList.toString())); } return null; } @Override public boolean isEnabled() { GitHistoryPage page = getPage(); if (page == null) return false; int size = getSelection(page).size(); if (size == 0) return false; return page.getInputInternal().isSingleFile(); } }