bundles/org.eclipse.team.cvs.ui/src/org/eclipse/team/internal/ccvs/ui/HistoryView.java - gerrit/platform/eclipse.platform.team - Git at Google

 package org.eclipse.team.internal.ccvs.ui;

 /*
  * (c) Copyright IBM Corp. 2000, 2002.
  * All Rights Reserved.
  */

 import java.io.InputStream;
 import java.lang.reflect.InvocationTargetException;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.core.runtime.SubProgressMonitor;
 import org.eclipse.jface.action.Action;
 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.action.IMenuListener;
 import org.eclipse.jface.action.IMenuManager;
 import org.eclipse.jface.action.IToolBarManager;
 import org.eclipse.jface.action.MenuManager;
 import org.eclipse.jface.action.Separator;
 import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.jface.dialogs.ProgressMonitorDialog;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.text.Document;
 import org.eclipse.jface.text.ITextOperationTarget;
 import org.eclipse.jface.text.ITextViewer;
 import org.eclipse.jface.text.TextViewer;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.IStructuredContentProvider;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.ITableLabelProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jface.viewers.SelectionChangedEvent;
 import org.eclipse.jface.viewers.TableLayout;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.BusyIndicator;
 import org.eclipse.swt.custom.SashForm;
 import org.eclipse.swt.custom.StyledText;
 import org.eclipse.swt.dnd.DND;
 import org.eclipse.swt.dnd.Transfer;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Menu;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.team.ccvs.core.CVSTag;
 import org.eclipse.team.ccvs.core.CVSTeamProvider;
 import org.eclipse.team.ccvs.core.ICVSRemoteFile;
 import org.eclipse.team.ccvs.core.ILogEntry;
 import org.eclipse.team.core.ITeamProvider;
 import org.eclipse.team.core.TeamException;
 import org.eclipse.team.core.TeamPlugin;
 import org.eclipse.team.internal.ccvs.ui.actions.OpenRemoteFileAction;
 import org.eclipse.ui.IActionBars;
 import org.eclipse.ui.ISelectionListener;
 import org.eclipse.ui.IWorkbenchActionConstants;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.PartInitException;
 import org.eclipse.ui.actions.WorkspaceModifyOperation;
 import org.eclipse.ui.part.ResourceTransfer;
 import org.eclipse.ui.part.ViewPart;
 import org.eclipse.ui.texteditor.ITextEditorActionConstants;
 import org.eclipse.ui.texteditor.IUpdate;

 /**
  * The history view allows browsing of an array of resource revisions
  */
 public class HistoryView extends ViewPart implements ISelectionListener {
 	private IFile file;
 	private CVSTeamProvider provider;

 	private TableViewer tableViewer;
 	private TextViewer textViewer;

 	private OpenRemoteFileAction openAction;
 	private IAction toggleTextAction;
 	private TextViewerAction copyAction;
 	private TextViewerAction selectAllAction;
 	private Action addAction;

 	private SashForm sashForm;

 	//column constants
 	private static final int COL_REVISION = 0;
 	private static final int COL_TAGS = 1;
 	private static final int COL_DATE = 2;
 	private static final int COL_AUTHOR = 3;
 	private static final int COL_COMMENT = 4;

 	class HistoryLabelProvider extends LabelProvider implements ITableLabelProvider {
 		public Image getColumnImage(Object element, int columnIndex) {
 			return null;
 		}
 		public String getColumnText(Object element, int columnIndex) {
 			ILogEntry entry = (ILogEntry)element;
 			switch (columnIndex) {
 				case COL_REVISION:
 					String revision = entry.getRevision();
 					if (file == null) return revision;
 					try {
 						ICVSRemoteFile currentEdition = (ICVSRemoteFile)provider.getRemoteResource(file);
 						if (currentEdition != null && currentEdition.getRevision().equals(revision)) {
 							return "*" + revision;
 						}
 					} catch (TeamException e) {
 						ErrorDialog.openError(getViewSite().getShell(), null, null, e.getStatus());
 					}
 					return revision;
 				case COL_TAGS:
 					CVSTag[] tags = entry.getTags();
 					StringBuffer result = new StringBuffer();
 					for (int i = 0; i < tags.length; i++) {
 						result.append(tags[i].getName());
 						if (i < tags.length - 1) {
 							result.append(", ");
 						}
 					}
 					return result.toString();
 				case COL_DATE:
 					return entry.getDate();
 				case COL_AUTHOR:
 					return entry.getAuthor();
 				case COL_COMMENT:
 					String comment = entry.getComment();
 					int index = comment.indexOf("\n");
 					switch (index) {
 						case -1:
 							return comment;
 						case 0:
 							return "[...]";
 						default:
 							return comment.substring(0, index - 1) + "[...]";
 					}
 			}
 			return "";
 		}
 	}

 	public static final String VIEW_ID = "org.eclipse.team.ccvs.ui.HistoryView";

 	/**
 	 * Adds the action contributions for this view.
 	 */
 	protected void contributeActions() {
 		// Refresh (toolbar)
 		final Action refreshAction = new Action(Policy.bind("HistoryView.refresh"), CVSUIPlugin.getPlugin().getImageDescriptor(ICVSUIConstants.IMG_REFRESH)) {
 			public void run() {
 				BusyIndicator.showWhile(tableViewer.getTable().getDisplay(), new Runnable() {
 					public void run() {
 						tableViewer.refresh();
 					}
 				});
 			}
 		};
 		refreshAction.setToolTipText(Policy.bind("HistoryView.refresh"));

 		// Double click open action
 		openAction = new OpenRemoteFileAction();
 		tableViewer.getTable().addListener(SWT.DefaultSelection, new Listener() {
 			public void handleEvent(Event e) {
 				openAction.selectionChanged(null, tableViewer.getSelection());
 				openAction.run(null);
 			}
 		});

 		addAction = new Action(Policy.bind("HistoryView.addToWorkspace")) {
 			public void run() {
 				try {
 					new ProgressMonitorDialog(getViewSite().getShell()).run(true, true, new WorkspaceModifyOperation() {
 						protected void execute(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
 							if (file == null) return;
 							ISelection selection = tableViewer.getSelection();
 							if (!(selection instanceof IStructuredSelection)) return;
 							IStructuredSelection ss = (IStructuredSelection)selection;
 							Object o = ss.getFirstElement();
 							ILogEntry entry = (ILogEntry)o;
 							ICVSRemoteFile remoteFile = entry.getRemoteFile();
 							// Do the load. This just consists of setting the local contents. We don't
 							// actually want to change the base.
 							monitor.beginTask(null, 100);
 							try {
 								InputStream in = remoteFile.getContents(new SubProgressMonitor(monitor, 50));
 								file.setContents(in, false, true, new SubProgressMonitor(monitor, 50));
 							} catch (TeamException e) {
 								throw new InvocationTargetException(e);
 							} catch (CoreException e) {
 								throw new InvocationTargetException(e);
 							} finally {
 								monitor.done();
 							}
 						}
 					});
 				} catch (InvocationTargetException e) {
 					Throwable t = e.getTargetException();
 					if (t instanceof TeamException) {
 						ErrorDialog.openError(getViewSite().getShell(), null, null, ((TeamException)t).getStatus());
 					} else if (t instanceof CoreException) {
 						IStatus status = ((CoreException)t).getStatus();
 						ErrorDialog.openError(getViewSite().getShell(), null, null, status);
 						CVSUIPlugin.log(status);
 					} else {
 						// To do
 					}
 				} catch (InterruptedException e) {
 					// Do nothing
 				}
 			}
 		};

 		// Toggle text visible action
 		final IPreferenceStore store = CVSUIPlugin.getPlugin().getPreferenceStore();
 		toggleTextAction = new Action(Policy.bind("HistoryView.showComment")) {
 			public void run() {
 				if (sashForm.getMaximizedControl() != null) {
 					sashForm.setMaximizedControl(null);
 				} else {
 					sashForm.setMaximizedControl(tableViewer.getControl());
 				}
 				store.setValue(ICVSUIConstants.PREF_SHOW_COMMENTS, toggleTextAction.isChecked());
 			}
 		};
 		toggleTextAction.setChecked(store.getBoolean(ICVSUIConstants.PREF_SHOW_COMMENTS));

 		// Contribute actions to popup menu
 		MenuManager menuMgr = new MenuManager();
 		Menu menu = menuMgr.createContextMenu(tableViewer.getTable());
 		menuMgr.addMenuListener(new IMenuListener() {
 			public void menuAboutToShow(IMenuManager menuMgr) {
 				fillTableMenu(menuMgr);
 			}
 		});
 		menuMgr.setRemoveAllWhenShown(true);
 		tableViewer.getTable().setMenu(menu);
 		getSite().registerContextMenu(menuMgr, tableViewer);

 		// Contribute toggle text visible to the toolbar drop-down
 		IActionBars actionBars = getViewSite().getActionBars();
 		IMenuManager actionBarsMenu = actionBars.getMenuManager();
 		actionBarsMenu.add(toggleTextAction);

 		// Create the local tool bar
 		IToolBarManager tbm = getViewSite().getActionBars().getToolBarManager();
 		tbm.add(refreshAction);
 		tbm.update(false);

 		// Create actions for the text editor
 		copyAction = new TextViewerAction(textViewer, ITextOperationTarget.COPY);
 		copyAction.setText(Policy.bind("HistoryView.copy"));
 		actionBars.setGlobalActionHandler(ITextEditorActionConstants.COPY, copyAction);

 		selectAllAction = new TextViewerAction(textViewer, ITextOperationTarget.SELECT_ALL);
 		selectAllAction.setText(Policy.bind("HistoryView.selectAll"));
 		actionBars.setGlobalActionHandler(ITextEditorActionConstants.SELECT_ALL, selectAllAction);

 		actionBars.updateActionBars();

 		menuMgr = new MenuManager();
 		menuMgr.setRemoveAllWhenShown(true);
 		menuMgr.addMenuListener(new IMenuListener() {
 			public void menuAboutToShow(IMenuManager menuMgr) {
 				fillTextMenu(menuMgr);
 			}
 		});
 		StyledText text = textViewer.getTextWidget();
 		menu = menuMgr.createContextMenu(text);
 		text.setMenu(menu);
 	}

 	/**
 	 * Creates the columns for the history table.
 	 */
 	private void createColumns(Table table, TableLayout layout) {
 		SelectionListener headerListener = getColumnListener();
 		// revision
 		TableColumn col = new TableColumn(table, SWT.NONE);
 		col.setResizable(true);
 		col.setText(Policy.bind("HistoryView.revision"));
 		col.addSelectionListener(headerListener);
 		layout.addColumnData(new ColumnWeightData(20, true));

 		// tags
 		col = new TableColumn(table, SWT.NONE);
 		col.setResizable(true);
 		col.setText(Policy.bind("HistoryView.tags"));
 		col.addSelectionListener(headerListener);
 		layout.addColumnData(new ColumnWeightData(20, true));

 		// creation date
 		col = new TableColumn(table, SWT.NONE);
 		col.setResizable(true);
 		col.setText(Policy.bind("HistoryView.date"));
 		col.addSelectionListener(headerListener);
 		layout.addColumnData(new ColumnWeightData(20, true));

 		// author
 		col = new TableColumn(table, SWT.NONE);
 		col.setResizable(true);
 		col.setText(Policy.bind("HistoryView.author"));
 		col.addSelectionListener(headerListener);
 		layout.addColumnData(new ColumnWeightData(20, true));

 		//comment
 		col = new TableColumn(table, SWT.NONE);
 		col.setResizable(true);
 		col.setText(Policy.bind("HistoryView.comment"));
 		col.addSelectionListener(headerListener);
 		layout.addColumnData(new ColumnWeightData(50, true));
 	}
 	/*
 	 * Method declared on IWorkbenchPart
 	 */
 	public void createPartControl(Composite parent) {
 		sashForm = new SashForm(parent, SWT.VERTICAL);
 		sashForm.setLayoutData(new GridData(GridData.FILL_BOTH));
 		tableViewer = createTable(sashForm);
 		textViewer = createText(sashForm);
 		sashForm.setWeights(new int[] { 70, 30 });
 		getSite().getPage().getWorkbenchWindow().getSelectionService().addSelectionListener(this);
 		contributeActions();
 		if (!CVSUIPlugin.getPlugin().getPreferenceStore().getBoolean(ICVSUIConstants.PREF_SHOW_COMMENTS)) {
 			sashForm.setMaximizedControl(tableViewer.getControl());
 		}
 		// set F1 help
 		//WorkbenchHelp.setHelp(viewer.getControl(), new ViewContextComputer (this, IVCMHelpContextIds.RESOURCE_HISTORY_VIEW));
 		initDragAndDrop();
 	}
 	/**
 	 * Creates the group that displays lists of the available repositories
 	 * and team streams.
 	 *
 	 * @param the parent composite to contain the group
 	 * @return the group control
 	 */
 	protected TableViewer createTable(Composite parent) {
 		Table table = new Table(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI | SWT.FULL_SELECTION);
 		table.setHeaderVisible(true);
 		table.setLinesVisible(true);
 		GridData data = new GridData(GridData.FILL_BOTH);
 		table.setLayoutData(data);

 		TableLayout layout = new TableLayout();
 		table.setLayout(layout);

 		createColumns(table, layout);

 		TableViewer viewer = new TableViewer(table);
 		viewer.setContentProvider(new IStructuredContentProvider() {
 			public Object[] getElements(Object inputElement) {
 				if (!(inputElement instanceof ICVSRemoteFile)) return null;
 				ICVSRemoteFile remoteFile = (ICVSRemoteFile)inputElement;
 				try {
 					return remoteFile.getLogEntries(new NullProgressMonitor());
 				} catch (TeamException e) {
 					ErrorDialog.openError(getViewSite().getShell(), null, null, e.getStatus());
 					// Set a default title
 					setTitle(Policy.bind("HistoryView.title"));
 				}
 				return null;

 			}
 			public void dispose() {
 			}
 			/**
 			 * The input has changed. Change the title of the view if necessary.
 			 */
 			public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
 				if (!(newInput instanceof ICVSRemoteFile)) {
 					setTitle(Policy.bind("HistoryView.title"));
 					return;
 				}
 				ICVSRemoteFile newFile = (ICVSRemoteFile)newInput;
 				setTitle(Policy.bind("HistoryView.titleWithArgument", newFile.getName()));
 			}
 		});
 		viewer.setLabelProvider(new HistoryLabelProvider());

 		viewer.addSelectionChangedListener(new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent event) {
 				ISelection selection = event.getSelection();
 				if (selection == null || !(selection instanceof IStructuredSelection)) {
 					textViewer.setDocument(new Document(""));
 					return;
 				}
 				IStructuredSelection ss = (IStructuredSelection)selection;
 				if (ss.size() != 1) {
 					textViewer.setDocument(new Document(""));
 					return;
 				}
 				ILogEntry entry = (ILogEntry)ss.getFirstElement();
 				textViewer.setDocument(new Document(entry.getComment()));
 			}
 		});

 		// By default, reverse sort by revision.
 		HistorySorter sorter = new HistorySorter(COL_REVISION);
 		sorter.setReversed(true);
 		viewer.setSorter(sorter);

 		return viewer;
 	}
 	protected TextViewer createText(Composite parent) {
 		TextViewer result = new TextViewer(parent, SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI | SWT.BORDER | SWT.READ_ONLY);
 		result.addSelectionChangedListener(new ISelectionChangedListener() {
 			public void selectionChanged(SelectionChangedEvent event) {
 				copyAction.update();
 			}
 		});
 		return result;
 	}
 	public void dispose() {
 		getSite().getPage().getWorkbenchWindow().getSelectionService().removeSelectionListener(this);
 	}
 	/**
 	 * Adds the listener that sets the sorter.
 	 */
 	private SelectionListener getColumnListener() {
 		/**
 	 	 * This class handles selections of the column headers.
 		 * Selection of the column header will cause resorting
 		 * of the shown tasks using that column's sorter.
 		 * Repeated selection of the header will toggle
 		 * sorting order (ascending versus descending).
 		 */
 		return new SelectionAdapter() {
 			/**
 			 * Handles the case of user selecting the
 			 * header area.
 			 * <p>If the column has not been selected previously,
 			 * it will set the sorter of that column to be
 			 * the current tasklist sorter. Repeated
 			 * presses on the same column header will
 			 * toggle sorting order (ascending/descending).
 			 */
 			public void widgetSelected(SelectionEvent e) {
 				// column selected - need to sort
 				int column = tableViewer.getTable().indexOf((TableColumn) e.widget);
 				HistorySorter oldSorter = (HistorySorter)tableViewer.getSorter();
 				if (oldSorter != null && column == oldSorter.getColumnNumber()) {
 					oldSorter.setReversed(!oldSorter.isReversed());
 					tableViewer.refresh();
 				} else {
 					tableViewer.setSorter(new HistorySorter(column));
 				}
 			}
 		};
 	}
 	/**
 	 * Returns the table viewer contained in this view.
 	 */
 	protected TableViewer getViewer() {
 		return tableViewer;
 	}
 	/**
 	 * Adds drag and drop support to the history view.
 	 */
 	void initDragAndDrop() {
 		int ops = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK;
 		Transfer[] transfers = new Transfer[] {ResourceTransfer.getInstance()};
 		tableViewer.addDropSupport(ops, transfers, new HistoryDropAdapter(tableViewer, this));
 	}
 	private void fillTableMenu(IMenuManager manager) {
 		if (tableViewer.getInput() == null) return;
 		// file actions go first (view file)
 		manager.add(new Separator(IWorkbenchActionConstants.GROUP_FILE));
 		if (file != null) {
 			// Add the "Add to Workspace" action if 1 revision is selected.
 			ISelection sel = tableViewer.getSelection();
 			if (!sel.isEmpty()) {
 				if (sel instanceof IStructuredSelection) {
 					if (((IStructuredSelection)sel).size() == 1) {
 						manager.add(addAction);
 					}
 				}
 			}
 		}
 		manager.add(new Separator("additions"));
 		manager.add(new Separator("additions-end"));
 	}
 	private void fillTextMenu(IMenuManager manager) {
 		manager.add(copyAction);
 		manager.add(selectAllAction);
 	}
 	/**
 	 * Makes the history view visible in the active perspective. If there
 	 * isn't a history view registered <code>null</code> is returned.
 	 * Otherwise the opened view part is returned.
 	 */
 	public static HistoryView openInActivePerspective() {
 		try {
 			return (HistoryView)CVSUIPlugin.getActivePage().showView(VIEW_ID);
 		} catch (PartInitException pe) {
 			return null;
 		}
 	}
 	public void selectionChanged(IWorkbenchPart part, ISelection selection) {
 		/*if (CVSUIPlugin.getDefault().getPreferenceStore().getBoolean(ICVSUIConstants.PREF_HISTORY_TRACKS_SELECTION)) {
 			if (selection == null) return;
 			if (!(selection instanceof IStructuredSelection)) return;
 			IStructuredSelection ss = (IStructuredSelection)selection;
 			if (ss.size() != 1) {
 				showHistory(null);
 				return;
 			}
 			Object first = ss.getFirstElement();
 			try {
 				IVersionHistory history = getHistory(first);
 				showHistory(history);
 			} catch (CoreException e) {
 				showHistory(null);
 			}
 		}*/
 	}
 	/** (Non-javadoc)
 	 * Method declared on IWorkbenchPart
 	 */
 	public void setFocus() {
 		if (tableViewer != null) {
 			Table control = tableViewer.getTable();
 			if (control != null && !control.isDisposed()) {
 				control.setFocus();
 			}
 		}
 	}

 	/**
 	 * Shows the history for the given IResource in the view.
 	 *
 	 * Only files are supported for now.
 	 */
 	public void showHistory(IResource resource) {
 		if (!(resource instanceof IFile)) return;
 		IFile file = (IFile)resource;
 		this.file = file;
 		ITeamProvider teamProvider = TeamPlugin.getManager().getProvider(file.getProject());
 		if (teamProvider == null) return;
 		if (!(teamProvider instanceof CVSTeamProvider)) return;
 		this.provider = (CVSTeamProvider)teamProvider;
 		try {
 			tableViewer.setInput(provider.getRemoteResource(file));
 		} catch (TeamException e) {
 			ErrorDialog.openError(getViewSite().getShell(), null, null, e.getStatus());
 		}
 	}

 	/**
 	 * Shows the history for the given ICVSRemoteFile in the view.
 	 */
 	public void showHistory(ICVSRemoteFile file) {
 		this.file = null;
 		tableViewer.setInput(file);
 	}
 }
	package org.eclipse.team.internal.ccvs.ui;

	/*
	* (c) Copyright IBM Corp. 2000, 2002.
	* All Rights Reserved.
	*/

	import java.io.InputStream;
	import java.lang.reflect.InvocationTargetException;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IProgressMonitor;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.NullProgressMonitor;
	import org.eclipse.core.runtime.SubProgressMonitor;
	import org.eclipse.jface.action.Action;
	import org.eclipse.jface.action.IAction;
	import org.eclipse.jface.action.IMenuListener;
	import org.eclipse.jface.action.IMenuManager;
	import org.eclipse.jface.action.IToolBarManager;
	import org.eclipse.jface.action.MenuManager;
	import org.eclipse.jface.action.Separator;
	import org.eclipse.jface.dialogs.ErrorDialog;
	import org.eclipse.jface.dialogs.ProgressMonitorDialog;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.text.Document;
	import org.eclipse.jface.text.ITextOperationTarget;
	import org.eclipse.jface.text.ITextViewer;
	import org.eclipse.jface.text.TextViewer;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.ISelectionChangedListener;
	import org.eclipse.jface.viewers.IStructuredContentProvider;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.ITableLabelProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jface.viewers.SelectionChangedEvent;
	import org.eclipse.jface.viewers.TableLayout;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.Viewer;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.BusyIndicator;
	import org.eclipse.swt.custom.SashForm;
	import org.eclipse.swt.custom.StyledText;
	import org.eclipse.swt.dnd.DND;
	import org.eclipse.swt.dnd.Transfer;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Menu;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.team.ccvs.core.CVSTag;
	import org.eclipse.team.ccvs.core.CVSTeamProvider;
	import org.eclipse.team.ccvs.core.ICVSRemoteFile;
	import org.eclipse.team.ccvs.core.ILogEntry;
	import org.eclipse.team.core.ITeamProvider;
	import org.eclipse.team.core.TeamException;
	import org.eclipse.team.core.TeamPlugin;
	import org.eclipse.team.internal.ccvs.ui.actions.OpenRemoteFileAction;
	import org.eclipse.ui.IActionBars;
	import org.eclipse.ui.ISelectionListener;
	import org.eclipse.ui.IWorkbenchActionConstants;
	import org.eclipse.ui.IWorkbenchPart;
	import org.eclipse.ui.PartInitException;
	import org.eclipse.ui.actions.WorkspaceModifyOperation;
	import org.eclipse.ui.part.ResourceTransfer;
	import org.eclipse.ui.part.ViewPart;
	import org.eclipse.ui.texteditor.ITextEditorActionConstants;
	import org.eclipse.ui.texteditor.IUpdate;

	/**
	* The history view allows browsing of an array of resource revisions
	*/
	public class HistoryView extends ViewPart implements ISelectionListener {
	private IFile file;
	private CVSTeamProvider provider;

	private TableViewer tableViewer;
	private TextViewer textViewer;

	private OpenRemoteFileAction openAction;
	private IAction toggleTextAction;
	private TextViewerAction copyAction;
	private TextViewerAction selectAllAction;
	private Action addAction;

	private SashForm sashForm;

	//column constants
	private static final int COL_REVISION = 0;
	private static final int COL_TAGS = 1;
	private static final int COL_DATE = 2;
	private static final int COL_AUTHOR = 3;
	private static final int COL_COMMENT = 4;

	class HistoryLabelProvider extends LabelProvider implements ITableLabelProvider {
	public Image getColumnImage(Object element, int columnIndex) {
	return null;
	}
	public String getColumnText(Object element, int columnIndex) {
	ILogEntry entry = (ILogEntry)element;
	switch (columnIndex) {
	case COL_REVISION:
	String revision = entry.getRevision();
	if (file == null) return revision;
	try {
	ICVSRemoteFile currentEdition = (ICVSRemoteFile)provider.getRemoteResource(file);
	if (currentEdition != null && currentEdition.getRevision().equals(revision)) {
	return "*" + revision;
	}
	} catch (TeamException e) {
	ErrorDialog.openError(getViewSite().getShell(), null, null, e.getStatus());
	}
	return revision;
	case COL_TAGS:
	CVSTag[] tags = entry.getTags();
	StringBuffer result = new StringBuffer();
	for (int i = 0; i < tags.length; i++) {
	result.append(tags[i].getName());
	if (i < tags.length - 1) {
	result.append(", ");
	}
	}
	return result.toString();
	case COL_DATE:
	return entry.getDate();
	case COL_AUTHOR:
	return entry.getAuthor();
	case COL_COMMENT:
	String comment = entry.getComment();
	int index = comment.indexOf("\n");
	switch (index) {
	case -1:
	return comment;
	case 0:
	return "[...]";
	default:
	return comment.substring(0, index - 1) + "[...]";
	}
	}
	return "";
	}
	}

	public static final String VIEW_ID = "org.eclipse.team.ccvs.ui.HistoryView";

	/**
	* Adds the action contributions for this view.
	*/
	protected void contributeActions() {
	// Refresh (toolbar)
	final Action refreshAction = new Action(Policy.bind("HistoryView.refresh"), CVSUIPlugin.getPlugin().getImageDescriptor(ICVSUIConstants.IMG_REFRESH)) {
	public void run() {
	BusyIndicator.showWhile(tableViewer.getTable().getDisplay(), new Runnable() {
	public void run() {
	tableViewer.refresh();
	}
	});
	}
	};
	refreshAction.setToolTipText(Policy.bind("HistoryView.refresh"));

	// Double click open action
	openAction = new OpenRemoteFileAction();
	tableViewer.getTable().addListener(SWT.DefaultSelection, new Listener() {
	public void handleEvent(Event e) {
	openAction.selectionChanged(null, tableViewer.getSelection());
	openAction.run(null);
	}
	});

	addAction = new Action(Policy.bind("HistoryView.addToWorkspace")) {
	public void run() {
	try {
	new ProgressMonitorDialog(getViewSite().getShell()).run(true, true, new WorkspaceModifyOperation() {
	protected void execute(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
	if (file == null) return;
	ISelection selection = tableViewer.getSelection();
	if (!(selection instanceof IStructuredSelection)) return;
	IStructuredSelection ss = (IStructuredSelection)selection;
	Object o = ss.getFirstElement();
	ILogEntry entry = (ILogEntry)o;
	ICVSRemoteFile remoteFile = entry.getRemoteFile();
	// Do the load. This just consists of setting the local contents. We don't
	// actually want to change the base.
	monitor.beginTask(null, 100);
	try {
	InputStream in = remoteFile.getContents(new SubProgressMonitor(monitor, 50));
	file.setContents(in, false, true, new SubProgressMonitor(monitor, 50));
	} catch (TeamException e) {
	throw new InvocationTargetException(e);
	} catch (CoreException e) {
	throw new InvocationTargetException(e);
	} finally {
	monitor.done();
	}
	}
	});
	} catch (InvocationTargetException e) {
	Throwable t = e.getTargetException();
	if (t instanceof TeamException) {
	ErrorDialog.openError(getViewSite().getShell(), null, null, ((TeamException)t).getStatus());
	} else if (t instanceof CoreException) {
	IStatus status = ((CoreException)t).getStatus();
	ErrorDialog.openError(getViewSite().getShell(), null, null, status);
	CVSUIPlugin.log(status);
	} else {
	// To do
	}
	} catch (InterruptedException e) {
	// Do nothing
	}
	}
	};

	// Toggle text visible action
	final IPreferenceStore store = CVSUIPlugin.getPlugin().getPreferenceStore();
	toggleTextAction = new Action(Policy.bind("HistoryView.showComment")) {
	public void run() {
	if (sashForm.getMaximizedControl() != null) {
	sashForm.setMaximizedControl(null);
	} else {
	sashForm.setMaximizedControl(tableViewer.getControl());
	}
	store.setValue(ICVSUIConstants.PREF_SHOW_COMMENTS, toggleTextAction.isChecked());
	}
	};
	toggleTextAction.setChecked(store.getBoolean(ICVSUIConstants.PREF_SHOW_COMMENTS));

	// Contribute actions to popup menu
	MenuManager menuMgr = new MenuManager();
	Menu menu = menuMgr.createContextMenu(tableViewer.getTable());
	menuMgr.addMenuListener(new IMenuListener() {
	public void menuAboutToShow(IMenuManager menuMgr) {
	fillTableMenu(menuMgr);
	}
	});
	menuMgr.setRemoveAllWhenShown(true);
	tableViewer.getTable().setMenu(menu);
	getSite().registerContextMenu(menuMgr, tableViewer);

	// Contribute toggle text visible to the toolbar drop-down
	IActionBars actionBars = getViewSite().getActionBars();
	IMenuManager actionBarsMenu = actionBars.getMenuManager();
	actionBarsMenu.add(toggleTextAction);

	// Create the local tool bar
	IToolBarManager tbm = getViewSite().getActionBars().getToolBarManager();
	tbm.add(refreshAction);
	tbm.update(false);

	// Create actions for the text editor
	copyAction = new TextViewerAction(textViewer, ITextOperationTarget.COPY);
	copyAction.setText(Policy.bind("HistoryView.copy"));
	actionBars.setGlobalActionHandler(ITextEditorActionConstants.COPY, copyAction);

	selectAllAction = new TextViewerAction(textViewer, ITextOperationTarget.SELECT_ALL);
	selectAllAction.setText(Policy.bind("HistoryView.selectAll"));
	actionBars.setGlobalActionHandler(ITextEditorActionConstants.SELECT_ALL, selectAllAction);

	actionBars.updateActionBars();

	menuMgr = new MenuManager();
	menuMgr.setRemoveAllWhenShown(true);
	menuMgr.addMenuListener(new IMenuListener() {
	public void menuAboutToShow(IMenuManager menuMgr) {
	fillTextMenu(menuMgr);
	}
	});
	StyledText text = textViewer.getTextWidget();
	menu = menuMgr.createContextMenu(text);
	text.setMenu(menu);
	}

	/**
	* Creates the columns for the history table.
	*/
	private void createColumns(Table table, TableLayout layout) {
	SelectionListener headerListener = getColumnListener();
	// revision
	TableColumn col = new TableColumn(table, SWT.NONE);
	col.setResizable(true);
	col.setText(Policy.bind("HistoryView.revision"));
	col.addSelectionListener(headerListener);
	layout.addColumnData(new ColumnWeightData(20, true));

	// tags
	col = new TableColumn(table, SWT.NONE);
	col.setResizable(true);
	col.setText(Policy.bind("HistoryView.tags"));
	col.addSelectionListener(headerListener);
	layout.addColumnData(new ColumnWeightData(20, true));

	// creation date
	col = new TableColumn(table, SWT.NONE);
	col.setResizable(true);
	col.setText(Policy.bind("HistoryView.date"));
	col.addSelectionListener(headerListener);
	layout.addColumnData(new ColumnWeightData(20, true));

	// author
	col = new TableColumn(table, SWT.NONE);
	col.setResizable(true);
	col.setText(Policy.bind("HistoryView.author"));
	col.addSelectionListener(headerListener);
	layout.addColumnData(new ColumnWeightData(20, true));

	//comment
	col = new TableColumn(table, SWT.NONE);
	col.setResizable(true);
	col.setText(Policy.bind("HistoryView.comment"));
	col.addSelectionListener(headerListener);
	layout.addColumnData(new ColumnWeightData(50, true));
	}
	/*
	* Method declared on IWorkbenchPart
	*/
	public void createPartControl(Composite parent) {
	sashForm = new SashForm(parent, SWT.VERTICAL);
	sashForm.setLayoutData(new GridData(GridData.FILL_BOTH));
	tableViewer = createTable(sashForm);
	textViewer = createText(sashForm);
	sashForm.setWeights(new int[] { 70, 30 });
	getSite().getPage().getWorkbenchWindow().getSelectionService().addSelectionListener(this);
	contributeActions();
	if (!CVSUIPlugin.getPlugin().getPreferenceStore().getBoolean(ICVSUIConstants.PREF_SHOW_COMMENTS)) {
	sashForm.setMaximizedControl(tableViewer.getControl());
	}
	// set F1 help
	//WorkbenchHelp.setHelp(viewer.getControl(), new ViewContextComputer (this, IVCMHelpContextIds.RESOURCE_HISTORY_VIEW));
	initDragAndDrop();
	}
	/**
	* Creates the group that displays lists of the available repositories
	* and team streams.
	*
	* @param the parent composite to contain the group
	* @return the group control
	*/
	protected TableViewer createTable(Composite parent) {
	Table table = new Table(parent, SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.MULTI \| SWT.FULL_SELECTION);
	table.setHeaderVisible(true);
	table.setLinesVisible(true);
	GridData data = new GridData(GridData.FILL_BOTH);
	table.setLayoutData(data);

	TableLayout layout = new TableLayout();
	table.setLayout(layout);

	createColumns(table, layout);

	TableViewer viewer = new TableViewer(table);
	viewer.setContentProvider(new IStructuredContentProvider() {
	public Object[] getElements(Object inputElement) {
	if (!(inputElement instanceof ICVSRemoteFile)) return null;
	ICVSRemoteFile remoteFile = (ICVSRemoteFile)inputElement;
	try {
	return remoteFile.getLogEntries(new NullProgressMonitor());
	} catch (TeamException e) {
	ErrorDialog.openError(getViewSite().getShell(), null, null, e.getStatus());
	// Set a default title
	setTitle(Policy.bind("HistoryView.title"));
	}
	return null;

	}
	public void dispose() {
	}
	/**
	* The input has changed. Change the title of the view if necessary.
	*/
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	if (!(newInput instanceof ICVSRemoteFile)) {
	setTitle(Policy.bind("HistoryView.title"));
	return;
	}
	ICVSRemoteFile newFile = (ICVSRemoteFile)newInput;
	setTitle(Policy.bind("HistoryView.titleWithArgument", newFile.getName()));
	}
	});
	viewer.setLabelProvider(new HistoryLabelProvider());

	viewer.addSelectionChangedListener(new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	ISelection selection = event.getSelection();
	if (selection == null \|\| !(selection instanceof IStructuredSelection)) {
	textViewer.setDocument(new Document(""));
	return;
	}
	IStructuredSelection ss = (IStructuredSelection)selection;
	if (ss.size() != 1) {
	textViewer.setDocument(new Document(""));
	return;
	}
	ILogEntry entry = (ILogEntry)ss.getFirstElement();
	textViewer.setDocument(new Document(entry.getComment()));
	}
	});

	// By default, reverse sort by revision.
	HistorySorter sorter = new HistorySorter(COL_REVISION);
	sorter.setReversed(true);
	viewer.setSorter(sorter);

	return viewer;
	}
	protected TextViewer createText(Composite parent) {
	TextViewer result = new TextViewer(parent, SWT.H_SCROLL \| SWT.V_SCROLL \| SWT.MULTI \| SWT.BORDER \| SWT.READ_ONLY);
	result.addSelectionChangedListener(new ISelectionChangedListener() {
	public void selectionChanged(SelectionChangedEvent event) {
	copyAction.update();
	}
	});
	return result;
	}
	public void dispose() {
	getSite().getPage().getWorkbenchWindow().getSelectionService().removeSelectionListener(this);
	}
	/**
	* Adds the listener that sets the sorter.
	*/
	private SelectionListener getColumnListener() {
	/**
	* This class handles selections of the column headers.
	* Selection of the column header will cause resorting
	* of the shown tasks using that column's sorter.
	* Repeated selection of the header will toggle
	* sorting order (ascending versus descending).
	*/
	return new SelectionAdapter() {
	/**
	* Handles the case of user selecting the
	* header area.
	* <p>If the column has not been selected previously,
	* it will set the sorter of that column to be
	* the current tasklist sorter. Repeated
	* presses on the same column header will
	* toggle sorting order (ascending/descending).
	*/
	public void widgetSelected(SelectionEvent e) {
	// column selected - need to sort
	int column = tableViewer.getTable().indexOf((TableColumn) e.widget);
	HistorySorter oldSorter = (HistorySorter)tableViewer.getSorter();
	if (oldSorter != null && column == oldSorter.getColumnNumber()) {
	oldSorter.setReversed(!oldSorter.isReversed());
	tableViewer.refresh();
	} else {
	tableViewer.setSorter(new HistorySorter(column));
	}
	}
	};
	}
	/**
	* Returns the table viewer contained in this view.
	*/
	protected TableViewer getViewer() {
	return tableViewer;
	}
	/**
	* Adds drag and drop support to the history view.
	*/
	void initDragAndDrop() {
	int ops = DND.DROP_MOVE \| DND.DROP_COPY \| DND.DROP_LINK;
	Transfer[] transfers = new Transfer[] {ResourceTransfer.getInstance()};
	tableViewer.addDropSupport(ops, transfers, new HistoryDropAdapter(tableViewer, this));
	}
	private void fillTableMenu(IMenuManager manager) {
	if (tableViewer.getInput() == null) return;
	// file actions go first (view file)
	manager.add(new Separator(IWorkbenchActionConstants.GROUP_FILE));
	if (file != null) {
	// Add the "Add to Workspace" action if 1 revision is selected.
	ISelection sel = tableViewer.getSelection();
	if (!sel.isEmpty()) {
	if (sel instanceof IStructuredSelection) {
	if (((IStructuredSelection)sel).size() == 1) {
	manager.add(addAction);
	}
	}
	}
	}
	manager.add(new Separator("additions"));
	manager.add(new Separator("additions-end"));
	}
	private void fillTextMenu(IMenuManager manager) {
	manager.add(copyAction);
	manager.add(selectAllAction);
	}
	/**
	* Makes the history view visible in the active perspective. If there
	* isn't a history view registered <code>null</code> is returned.
	* Otherwise the opened view part is returned.
	*/
	public static HistoryView openInActivePerspective() {
	try {
	return (HistoryView)CVSUIPlugin.getActivePage().showView(VIEW_ID);
	} catch (PartInitException pe) {
	return null;
	}
	}
	public void selectionChanged(IWorkbenchPart part, ISelection selection) {
	/*if (CVSUIPlugin.getDefault().getPreferenceStore().getBoolean(ICVSUIConstants.PREF_HISTORY_TRACKS_SELECTION)) {
	if (selection == null) return;
	if (!(selection instanceof IStructuredSelection)) return;
	IStructuredSelection ss = (IStructuredSelection)selection;
	if (ss.size() != 1) {
	showHistory(null);
	return;
	}
	Object first = ss.getFirstElement();
	try {
	IVersionHistory history = getHistory(first);
	showHistory(history);
	} catch (CoreException e) {
	showHistory(null);
	}
	}*/
	}
	/** (Non-javadoc)
	* Method declared on IWorkbenchPart
	*/
	public void setFocus() {
	if (tableViewer != null) {
	Table control = tableViewer.getTable();
	if (control != null && !control.isDisposed()) {
	control.setFocus();
	}
	}
	}

	/**
	* Shows the history for the given IResource in the view.
	*
	* Only files are supported for now.
	*/
	public void showHistory(IResource resource) {
	if (!(resource instanceof IFile)) return;
	IFile file = (IFile)resource;
	this.file = file;
	ITeamProvider teamProvider = TeamPlugin.getManager().getProvider(file.getProject());
	if (teamProvider == null) return;
	if (!(teamProvider instanceof CVSTeamProvider)) return;
	this.provider = (CVSTeamProvider)teamProvider;
	try {
	tableViewer.setInput(provider.getRemoteResource(file));
	} catch (TeamException e) {
	ErrorDialog.openError(getViewSite().getShell(), null, null, e.getStatus());
	}
	}

	/**
	* Shows the history for the given ICVSRemoteFile in the view.
	*/
	public void showHistory(ICVSRemoteFile file) {
	this.file = null;
	tableViewer.setInput(file);
	}
	}