Java tutorial
/******************************************************************************* * Copyright (C) 2011, 2013 Mathias Kinzler <mathias.kinzler@sap.com> and others. * * 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; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.util.ArrayList; import java.util.List; import java.util.Map.Entry; import org.eclipse.core.resources.IResource; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.egit.core.project.RepositoryMapping; import org.eclipse.egit.ui.Activator; import org.eclipse.egit.ui.UIPreferences; import org.eclipse.egit.ui.UIUtils; import org.eclipse.egit.ui.internal.UIText; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.dialogs.TitleAreaDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.operation.IRunnableWithProgress; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.resource.LocalResourceManager; import org.eclipse.jface.resource.ResourceManager; import org.eclipse.jface.viewers.IOpenListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.OpenEvent; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jgit.errors.IncorrectObjectTypeException; import org.eclipse.jgit.errors.MissingObjectException; import org.eclipse.jgit.lib.Constants; import org.eclipse.jgit.lib.ObjectId; import org.eclipse.jgit.lib.Ref; import org.eclipse.jgit.lib.Repository; import org.eclipse.jgit.revwalk.FollowFilter; import org.eclipse.jgit.revwalk.RevFlag; import org.eclipse.jgit.revwalk.RevSort; import org.eclipse.jgit.revwalk.RevWalk; import org.eclipse.jgit.treewalk.filter.AndTreeFilter; import org.eclipse.jgit.treewalk.filter.OrTreeFilter; import org.eclipse.jgit.treewalk.filter.PathFilter; import org.eclipse.jgit.treewalk.filter.TreeFilter; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.PlatformUI; /** * Allows to select a single commit */ public class CommitSelectionDialog extends TitleAreaDialog { private static final int BATCH_SIZE = 256; private final Repository repository; private final IResource[] filterResources; private CommitGraphTable table; private SWTCommitList allCommits; private RevFlag highlightFlag; private ObjectId commitId; /** * @param parentShell * @param repository */ public CommitSelectionDialog(Shell parentShell, Repository repository) { this(parentShell, repository, null); } /** * Create a commit selection dialog which shows only commits which changed * the given resources. * * @param parentShell * @param repository * @param filterResources * the resources to use to filter commits, null for no filter */ public CommitSelectionDialog(Shell parentShell, Repository repository, IResource[] filterResources) { super(parentShell); setShellStyle(getShellStyle() | SWT.SHELL_TRIM); this.repository = repository; this.filterResources = filterResources; } @Override protected Control createDialogArea(Composite parent) { Composite main = new Composite(parent, SWT.NONE); main.setLayout(new GridLayout(1, false)); GridDataFactory.fillDefaults().grab(true, true).applyTo(main); final ResourceManager resources = new LocalResourceManager(JFaceResources.getResources()); UIUtils.hookDisposal(main, resources); table = new CommitGraphTable(main, null, resources); table.getTableView().addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { commitId = null; IStructuredSelection sel = (IStructuredSelection) event.getSelection(); if (sel.size() == 1) commitId = ((SWTCommit) sel.getFirstElement()).getId(); getButton(OK).setEnabled(commitId != null); } }); table.getTableView().addOpenListener(new IOpenListener() { public void open(OpenEvent event) { if (getButton(OK).isEnabled()) buttonPressed(OK); } }); // allow for some room here GridDataFactory.fillDefaults().grab(true, true).minSize(SWT.DEFAULT, 400).applyTo(table.getControl()); allCommits = new SWTCommitList(table.getControl(), resources); return main; } @Override protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setText(UIText.CommitSelectionDialog_WindowTitle); } @Override public void create() { super.create(); getButton(OK).setEnabled(false); try { PlatformUI.getWorkbench().getProgressService().run(true, true, new IRunnableWithProgress() { public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException { try { monitor.beginTask(UIText.CommitSelectionDialog_BuildingCommitListMessage, IProgressMonitor.UNKNOWN); SWTWalk currentWalk = new SWTWalk(repository); currentWalk.setTreeFilter(createTreeFilter()); currentWalk.sort(RevSort.COMMIT_TIME_DESC, true); currentWalk.sort(RevSort.BOUNDARY, true); highlightFlag = currentWalk.newFlag("highlight"); //$NON-NLS-1$ allCommits.source(currentWalk); try { if (Activator.getDefault().getPreferenceStore() .getBoolean(UIPreferences.RESOURCEHISTORY_SHOW_ALL_BRANCHES)) { markStartAllRefs(currentWalk, Constants.R_HEADS); markStartAllRefs(currentWalk, Constants.R_REMOTES); } else currentWalk.markStart(currentWalk.parseCommit(repository.resolve(Constants.HEAD))); for (;;) { final int oldsz = allCommits.size(); allCommits.fillTo(oldsz + BATCH_SIZE - 1); if (monitor.isCanceled() || oldsz == allCommits.size()) break; String taskName = NLS.bind(UIText.CommitSelectionDialog_FoundCommitsMessage, Integer.valueOf(allCommits.size())); monitor.setTaskName(taskName); } } catch (IOException e) { throw new InvocationTargetException(e); } getShell().getDisplay().asyncExec(new Runnable() { public void run() { updateUi(); } }); if (monitor.isCanceled()) throw new InterruptedException(); } finally { monitor.done(); } } }); } catch (InvocationTargetException e) { setErrorMessage(e.getCause().getMessage()); } catch (InterruptedException e) { setMessage(UIText.CommitSelectionDialog_IncompleteListMessage, IMessageProvider.WARNING); } } /** * @return the commit id */ public ObjectId getCommitId() { return commitId; } private void updateUi() { setTitle(NLS.bind(UIText.CommitSelectionDialog_DialogTitle, Integer.valueOf(allCommits.size()), repository.getDirectory().toString())); setMessage(UIText.CommitSelectionDialog_DialogMessage); table.setInput(highlightFlag, allCommits, allCommits.toArray(new SWTCommit[allCommits.size()]), null, true); } private void markStartAllRefs(RevWalk currentWalk, String prefix) throws IOException, MissingObjectException, IncorrectObjectTypeException { for (Entry<String, Ref> refEntry : repository.getRefDatabase().getRefs(prefix).entrySet()) { Ref ref = refEntry.getValue(); if (ref.isSymbolic()) continue; currentWalk.markStart(currentWalk.parseCommit(ref.getObjectId())); } } private TreeFilter createTreeFilter() { if (filterResources == null) return TreeFilter.ALL; List<TreeFilter> filters = new ArrayList<TreeFilter>(); for (IResource resource : filterResources) { RepositoryMapping mapping = RepositoryMapping.getMapping(resource); if (mapping != null) { String path = mapping.getRepoRelativePath(resource); if (path != null && !"".equals(path)) { //$NON-NLS-1$ if (resource.getType() == IResource.FILE) filters.add(FollowFilter.create(path)); else filters.add(AndTreeFilter.create(PathFilter.create(path), TreeFilter.ANY_DIFF)); } } } if (filters.isEmpty()) return TreeFilter.ALL; else if (filters.size() == 1) return filters.get(0); else return OrTreeFilter.create(filters); } }