gitlight/plugins/org.eclipse.papyrus.gitlight.git.ui/src/org/eclipse/papyrus/gitlight/git/ui/views/ContributionsView.java - papyrus/org.eclipse.papyrus.incubation - Git at Google

 /*****************************************************************************
  * Copyright (c) 2019 CEA LIST, and others.
  *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *   Nicolas FAUVERGUE (CEA LIST) nicolas.fauvergue@cea.fr - Initial API and implementation
  *
  *****************************************************************************/
 package org.eclipse.papyrus.gitlight.git.ui.views;

 import java.text.SimpleDateFormat;
 import java.util.ArrayList;
 import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.runtime.IAdaptable;
 import org.eclipse.emf.common.util.URI;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.resource.Resource;
 import org.eclipse.jface.action.IMenuListener;
 import org.eclipse.jface.action.IMenuManager;
 import org.eclipse.jface.action.MenuManager;
 import org.eclipse.jface.action.Separator;
 import org.eclipse.jface.viewers.ColumnLabelProvider;
 import org.eclipse.jface.viewers.ColumnLayoutData;
 import org.eclipse.jface.viewers.ColumnPixelData;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.TableLayout;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.jface.viewers.TableViewerColumn;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.lib.Constants;
 import org.eclipse.jgit.lib.PersonIdent;
 import org.eclipse.jgit.lib.Ref;
 import org.eclipse.jgit.revwalk.RevCommit;
 import org.eclipse.papyrus.gitlight.git.ui.Activator;
 import org.eclipse.papyrus.gitlight.git.ui.providers.BranchesContentProvider;
 import org.eclipse.papyrus.gitlight.git.utils.PapyrusFileUtils;
 import org.eclipse.papyrus.gitlight.git.utils.GitConstants;
 import org.eclipse.papyrus.gitlight.git.utils.GitInstance;
 import org.eclipse.papyrus.gitlight.git.utils.GitUtils;
 import org.eclipse.papyrus.infra.core.resource.ModelSet;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.ControlListener;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Menu;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.ui.ISelectionListener;
 import org.eclipse.ui.IWorkbenchActionConstants;
 import org.eclipse.ui.IWorkbenchPart;
 import org.eclipse.ui.part.PageBook;
 import org.eclipse.ui.part.ViewPart;
 import org.eclipse.ui.views.properties.IPropertySheetPage;
 import org.eclipse.ui.views.properties.tabbed.ITabbedPropertySheetPageContributor;
 import org.eclipse.uml2.uml.Element;
 import org.eclipse.uml2.uml.NamedElement;

 /**
  * The Reviews view.
  */
 public class ContributionsView extends ViewPart implements ITabbedPropertySheetPageContributor {

 	/**
 	 * The ID of the view as specified by the extension.
 	 */
 	public static final String ID = "org.eclipse.papyrus.gitlight.git.ui.contributions.view"; //$NON-NLS-1$

 	/**
 	 * The menu id.
 	 */
 	public static final String MENU_ID = "org.eclipse.papyrus.gitlight.git.ui.contributions.view.popup"; //$NON-NLS-1$

 	/**
 	 * The used page book.
 	 */
 	private PageBook pagebook;

 	/**
 	 * The used table viewer for the branches.
 	 */
 	private TableViewer tableViewer;

 	/**
 	 * The property sheet pages.
 	 */
 	private List<IPropertySheetPage> propertiesSheetPages = new LinkedList<IPropertySheetPage>();

 	/**
 	 * The page listeners.
 	 */
 	private final CopyOnWriteArrayList<IContributionsViewPageListener> pageListeners = new CopyOnWriteArrayList<IContributionsViewPageListener>();

 	/**
 	 * The table layout for columns.
 	 */
 	private AutoResizeTableLayout tableLayout;


 	/**
 	 * The listener we register with the selection service.
 	 */
 	private ISelectionListener listener = new ISelectionListener() {
 		public void selectionChanged(IWorkbenchPart sourcepart, ISelection selection) {
 			// we ignore our own selections
 			if (sourcepart != ContributionsView.this) {
 				showSelection(sourcepart, selection);
 			}
 		}
 	};

 	/**
 	 * Default constructor.
 	 */
 	public ContributionsView() {
 		// Do nothing
 	}

 	/**
 	 * Shows the given selection in this view.
 	 *
 	 * @param sourcepart
 	 *            The source part workbench.
 	 * @param selection
 	 *            The selection.
 	 */
 	public void showSelection(final IWorkbenchPart sourcepart, final ISelection selection) {
 		String contentDescription = "Selection is not managed"; //$NON-NLS-1$
 		if (selection instanceof IStructuredSelection) {
 			final IStructuredSelection structuredSelection = (IStructuredSelection) selection;
 			if (structuredSelection.size() == 1) {
 				final Element element = getRootElement(structuredSelection.getFirstElement());
 				tableViewer.setInput(element);
 				if (null != element) {
 					if (element instanceof NamedElement) {
 						contentDescription = "Contributions for model '" + ((NamedElement) element).getName() + "'"; //$NON-NLS-1$ //$NON-NLS-2$
 					}
 				}
 				pagebook.showPage(tableViewer.getControl());
 			}
 		}
 		setContentDescription(contentDescription);
 	}

 	/**
 	 * Get the root of the selected element (it ban be file, EObject, others...).
 	 *
 	 * @param selectedObject
 	 *            The selected object.
 	 * @return The root element or <code>null</code>.
 	 */
 	protected Element getRootElement(final Object selectedObject) {
 		Element result = null;

 		// Manage the possible selected file
 		final IFile file = PapyrusFileUtils.getFile(selectedObject);
 		if (null != file) {
 			String fullPath = file.getFullPath().toString();
 			URI modelURI = URI.createPlatformResourceURI(fullPath, false);
 			if (!"uml".equals(modelURI.fileExtension())) { //$NON-NLS-1$
 				modelURI = modelURI.trimFileExtension().appendFileExtension("uml"); //$NON-NLS-1$
 			}
 			final ModelSet modelSet = new ModelSet();
 			final Resource resource = modelSet.getResource(modelURI, true);

 			if (null != resource) {
 				final EObject root = resource.getContents().get(0);

 				if (root instanceof Element) {
 					result = (Element) root;
 				}
 			}
 		}

 		// Manage other possibilities
 		if (null == result && selectedObject instanceof IAdaptable) {
 			final Element adapter = ((IAdaptable) selectedObject).getAdapter(Element.class);
 			if (null != adapter) {
 				result = adapter.getModel();
 			}
 		}

 		return result;
 	}

 	/**
 	 * {@inheritDoc}
 	 *
 	 * @see org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
 	 */
 	@Override
 	public void createPartControl(final Composite parent) {
 		pagebook = new PageBook(parent, SWT.NONE);

 		tableViewer = new TableViewer(pagebook, SWT.SINGLE | SWT.FULL_SELECTION | SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER);
 		tableViewer.getTable().setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
 		tableViewer.setContentProvider(new BranchesContentProvider(true));
 		tableViewer.getTable().setHeaderVisible(true);
 		tableViewer.getTable().setLinesVisible(true);

 		// Initialize the columns layout data
 		tableLayout = new AutoResizeTableLayout(tableViewer.getTable());
 		tableViewer.getTable().setLayout(tableLayout);

 		// Create the columns
 		createReviewDateColumn();
 		createReviewVersionColumn();
 		createReviewAuthorColumn();
 		createReviewCommentColumn();

 		final MenuManager menuManager = new MenuManager("#PopupMenu"); //$NON-NLS-1$
 		menuManager.setRemoveAllWhenShown(true);
 		menuManager.addMenuListener(new IMenuListener() {

 			public void menuAboutToShow(IMenuManager manager) {
 				manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
 			}

 		});

 		final Menu menu = menuManager.createContextMenu(tableViewer.getTable());
 		tableViewer.getTable().setMenu(menu);
 		getSite().registerContextMenu(MENU_ID, menuManager, tableViewer);

 		// Provider the table selection
 		getSite().setSelectionProvider(tableViewer);

 		// Add the selection listener
 		getSite().getWorkbenchWindow().getSelectionService().addSelectionListener(listener);
 	}

 	/**
 	 * This allows to create the date column.
 	 */
 	protected void createReviewDateColumn() {
 		final TableViewerColumn dateColumn = new TableViewerColumn(tableViewer, SWT.NONE);
 		dateColumn.getColumn().setText("Date"); //$NON-NLS-1$
 		dateColumn.getColumn().setWidth(150);
 		dateColumn.getColumn().setResizable(true);
 		tableLayout.addColumnData(new ColumnWeightData(150, 100, true));
 		dateColumn.setLabelProvider(new ColumnLabelProvider() {

 			/**
 			 * @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
 			 *
 			 * @param element
 			 * @return
 			 */
 			@Override
 			public String getText(Object element) {
 				if (element instanceof Ref) {
 					final Git git = GitInstance.getInstance().getGit();
 					final RevCommit lastCommit = GitUtils.getLastCommitOfBranch(git, (Ref) element);
 					PersonIdent authorIdent = lastCommit.getAuthorIdent();
 					Date authorDate = authorIdent.getWhen();
 					SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); //$NON-NLS-1$
 					return dateFormat.format(authorDate);
 				}
 				return "Not specified"; //$NON-NLS-1$
 			}
 		});
 	}

 	/**
 	 * This allows to create the version column.
 	 */
 	protected void createReviewVersionColumn() {
 		final TableViewerColumn versionColumn = new TableViewerColumn(tableViewer, SWT.NONE);
 		versionColumn.getColumn().setText("Version"); //$NON-NLS-1$
 		versionColumn.getColumn().setWidth(100);
 		versionColumn.getColumn().setResizable(true);
 		tableLayout.addColumnData(new ColumnWeightData(100, 50, true));
 		versionColumn.setLabelProvider(new ColumnLabelProvider() {

 			/**
 			 * @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
 			 *
 			 * @param element
 			 * @return
 			 */
 			@Override
 			public String getText(Object element) {
 				if (element instanceof Ref) {
 					final String name = ((Ref) element).getName();
 					if (name.contains(GitConstants.CONTRIBUTION_BRANCH_PREFIX) && name.length() > (GitConstants.CONTRIBUTION_BRANCH_PREFIX.length() + 18)) {
 						// 18 is the number of character for the unique identifier generated from the date (it is always the same size)
 						return name.substring(name.indexOf(GitConstants.CONTRIBUTION_BRANCH_PREFIX) + GitConstants.CONTRIBUTION_BRANCH_PREFIX.length() + 18);
 					}
 					return name;
 				}
 				return "Not specified"; //$NON-NLS-1$
 			}
 		});
 	}

 	/**
 	 * This allows to create the author column.
 	 */
 	protected void createReviewAuthorColumn() {
 		final TableViewerColumn authorColumn = new TableViewerColumn(tableViewer, SWT.NONE);
 		authorColumn.getColumn().setText("Author"); //$NON-NLS-1$
 		authorColumn.getColumn().setWidth(200);
 		authorColumn.getColumn().setResizable(true);
 		tableLayout.addColumnData(new ColumnWeightData(200, 100, true));
 		authorColumn.setLabelProvider(new ColumnLabelProvider() {

 			/**
 			 * @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
 			 *
 			 * @param element
 			 * @return
 			 */
 			@Override
 			public String getText(Object element) {
 				if (element instanceof Ref) {
 					final Git git = GitInstance.getInstance().getGit();
 					final RevCommit lastCommit = GitUtils.getLastCommitOfBranch(git, (Ref) element);

 					String author = null;
 					if (lastCommit.getFullMessage().contains(Constants.SIGNED_OFF_BY_TAG)) {
 						try {
 							final String subSignedOff = lastCommit.getFullMessage().substring(lastCommit.getFullMessage().indexOf(Constants.SIGNED_OFF_BY_TAG) + Constants.SIGNED_OFF_BY_TAG.length());
 							author = subSignedOff.contains("\n") ? subSignedOff.substring(0, subSignedOff.indexOf("\n")) : subSignedOff; //$NON-NLS-1$ //$NON-NLS-2$
 						} catch (Exception e) {
 							// Do nothing
 						}
 					}
 					if (null == author || author.isEmpty()) {
 						author = lastCommit.getAuthorIdent().getName();
 					}

 					return author;
 				}
 				return "Unknown"; //$NON-NLS-1$
 			}
 		});
 	}

 	/**
 	 * This allows to create the comment column.
 	 */
 	protected void createReviewCommentColumn() {
 		final TableViewerColumn commentColumn = new TableViewerColumn(tableViewer, SWT.NONE);
 		commentColumn.getColumn().setText("Comment"); //$NON-NLS-1$
 		commentColumn.getColumn().setWidth(600);
 		commentColumn.getColumn().setResizable(true);
 		tableLayout.addColumnData(new ColumnPixelData(600, true));
 		commentColumn.setLabelProvider(new ColumnLabelProvider() {

 			/**
 			 * @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
 			 *
 			 * @param element
 			 * @return
 			 */
 			@Override
 			public String getText(Object element) {
 				if (element instanceof Ref) {
 					final Git git = GitInstance.getInstance().getGit();
 					final RevCommit lastCommit = GitUtils.getLastCommitOfBranch(git, (Ref) element);
 					return lastCommit.getShortMessage();
 				}
 				return "Not specified"; //$NON-NLS-1$
 			}
 		});
 	}

 	/**
 	 * {@inheritDoc}
 	 *
 	 * @see org.eclipse.ui.part.WorkbenchPart#setFocus()
 	 */
 	@Override
 	public void setFocus() {
 		pagebook.setFocus();
 		firePageActivated();
 	}

 	/**
 	 * {@inheritDoc}
 	 *
 	 * @see org.eclipse.ui.part.WorkbenchPart#getAdapter(java.lang.Class)
 	 */
 	@SuppressWarnings("unchecked")
 	@Override
 	public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {

 		if (IPropertySheetPage.class == adapter) {
 			// Do not test if tabbedPropertySheetPage is null before calling new
 			// this is managed by Eclipse which only call current method when necessary
 			return getPropertySheetPage();
 		}

 		return super.getAdapter(adapter);
 	}

 	/**
 	 * This allows to define the property sheet page associated to this view.
 	 *
 	 * @return The property sheet page.
 	 */
 	private IPropertySheetPage getPropertySheetPage() {
 		IPropertySheetPage propertySheetPage = new ContributionsPropertySheetPage(this);
 		propertiesSheetPages.add(propertySheetPage);
 		return propertySheetPage;
 	}

 	/**
 	 * {@inheritDoc}
 	 *
 	 * @see org.eclipse.ui.part.WorkbenchPart#dispose()
 	 */
 	@Override
 	public void dispose() {
 		// important: We need do unregister our listener when the view is disposed
 		getSite().getWorkbenchWindow().getSelectionService().removeSelectionListener(listener);

 		for (final IPropertySheetPage page : propertiesSheetPages) {
 			page.dispose();
 		}
 		propertiesSheetPages.clear();
 		super.dispose();
 	}

 	/**
 	 * {@inheritDoc}
 	 *
 	 * @see org.eclipse.ui.views.properties.tabbed.ITabbedPropertySheetPageContributor#getContributorId()
 	 */
 	@Override
 	public String getContributorId() {
 		return "TreeOutlinePage"; //$NON-NLS-1$
 	}

 	/**
 	 * This allows to add a page listener.
 	 *
 	 * @param listener
 	 *            The page listener to add.
 	 */
 	void addPageListener(final IContributionsViewPageListener listener) {
 		pageListeners.addIfAbsent(listener);
 	}

 	/**
 	 * This allows to remove a page listener.
 	 *
 	 * @param listener
 	 *            The page listener to remove.
 	 */
 	void removePageListener(final IContributionsViewPageListener listener) {
 		pageListeners.remove(listener);
 	}

 	/**
 	 * This allows to call the activated pages.
 	 */
 	private void firePageActivated() {
 		for (final IContributionsViewPageListener next : pageListeners) {
 			try {
 				next.pageActivated(this);
 			} catch (Exception e) {
 				Activator.getLogHelper().error("Uncaught exception in page activation listener.", e); //$NON-NLS-1$
 			}
 		}
 	}

 	/**
 	 * This class allows to manage correctly the columns in the table viewer.
 	 */
 	public class AutoResizeTableLayout extends TableLayout implements ControlListener {

 		/**
 		 * The table to manage.
 		 */
 		private final Table table;

 		/**
 		 * The columns layout data.
 		 */
 		private List<ColumnLayoutData> columns = new ArrayList<ColumnLayoutData>();

 		/**
 		 * This manage the auto sizing of the columns.
 		 */
 		private boolean autosizing = false;

 		/**
 		 * Default constructor.
 		 *
 		 * @param table
 		 *            The table to manage.
 		 */
 		public AutoResizeTableLayout(final Table table) {
 			this.table = table;
 			table.addControlListener(this);
 		}

 		/**
 		 * {@inheritDoc}
 		 *
 		 * @see org.eclipse.jface.viewers.TableLayout#addColumnData(org.eclipse.jface.viewers.ColumnLayoutData)
 		 */
 		@Override
 		public void addColumnData(final ColumnLayoutData data) {
 			columns.add(data);
 			super.addColumnData(data);
 		}

 		/**
 		 * {@inheritDoc}
 		 *
 		 * @see org.eclipse.swt.events.ControlListener#controlMoved(org.eclipse.swt.events.ControlEvent)
 		 */
 		@Override
 		public void controlMoved(final ControlEvent e) {
 			// Do nothing
 		}

 		/**
 		 * {@inheritDoc}
 		 *
 		 * @see org.eclipse.swt.events.ControlListener#controlResized(org.eclipse.swt.events.ControlEvent)
 		 */
 		@Override
 		public void controlResized(final ControlEvent e) {
 			if (autosizing)
 				return;
 			autosizing = true;
 			try {
 				autoSizeColumns();
 			} finally {
 				autosizing = false;
 			}
 		}

 		/**
 		 * This allows to auto resize the columns depending to the space available.
 		 */
 		private void autoSizeColumns() {
 			int width = table.getClientArea().width;

 			// Layout is being called with an invalid value the first time it is being called on Linux.
 			// This method resets the layout to null, so we run it only when the value is OK.
 			if (width <= 1) {
 				return;
 			}

 			final TableColumn[] tableColumns = table.getColumns();
 			int size = Math.min(columns.size(), tableColumns.length);
 			int[] widths = new int[size];
 			int fixedWidth = 0;
 			int numberOfWeightColumns = 0;
 			int totalWeight = 0;

 			// First calc space occupied by fixed columns.
 			for (int i = 0; i < size; i++) {
 				final ColumnLayoutData col = columns.get(i);
 				if (col instanceof ColumnPixelData) {
 					int pixels = ((ColumnPixelData) col).width;
 					widths[i] = pixels;
 					fixedWidth += pixels;
 				} else if (col instanceof ColumnWeightData) {
 					final ColumnWeightData cw = (ColumnWeightData) col;
 					numberOfWeightColumns++;
 					int weight = cw.weight;
 					totalWeight += weight;
 				} else {
 					throw new IllegalStateException("Unknown column layout data");
 				}
 			}

 			// Do we have columns that have a weight?
 			if (numberOfWeightColumns > 0) {
 				// Now, distribute the rest to the columns with weight.
 				// Make sure there's enough room, even if we have to scroll.
 				if (width < fixedWidth + totalWeight) {
 					width = fixedWidth + totalWeight;
 				}
 				int rest = width - fixedWidth;
 				int totalDistributed = 0;
 				for (int i = 0; i < size; i++) {
 					final ColumnLayoutData col = columns.get(i);
 					if (col instanceof ColumnWeightData) {
 						final ColumnWeightData cw = (ColumnWeightData) col;
 						int weight = cw.weight;
 						int pixels = totalWeight == 0 ? 0 : weight * rest / totalWeight;
 						if (pixels < cw.minimumWidth) {
 							pixels = cw.minimumWidth;
 						}
 						totalDistributed += pixels;
 						widths[i] = pixels;
 					}
 				}

 				// Distribute any remaining pixels to columns with weight.
 				int diff = rest - totalDistributed;
 				for (int i = 0; diff > 0; i++) {
 					if (i == size) {
 						i = 0;
 					}
 					final ColumnLayoutData col = columns.get(i);
 					if (col instanceof ColumnWeightData) {
 						++widths[i];
 						--diff;
 					}
 				}
 			}

 			for (int i = 0; i < size; i++) {
 				if (tableColumns[i].getWidth() != widths[i]) {
 					tableColumns[i].setWidth(widths[i]);
 				}
 			}
 		}
 	}

 }
	/*****************************************************************************
	* Copyright (c) 2019 CEA LIST, and others.
	*
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Nicolas FAUVERGUE (CEA LIST) nicolas.fauvergue@cea.fr - Initial API and implementation
	*
	*****************************************************************************/
	package org.eclipse.papyrus.gitlight.git.ui.views;

	import java.text.SimpleDateFormat;
	import java.util.ArrayList;
	import java.util.Date;
	import java.util.LinkedList;
	import java.util.List;
	import java.util.concurrent.CopyOnWriteArrayList;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.runtime.IAdaptable;
	import org.eclipse.emf.common.util.URI;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.resource.Resource;
	import org.eclipse.jface.action.IMenuListener;
	import org.eclipse.jface.action.IMenuManager;
	import org.eclipse.jface.action.MenuManager;
	import org.eclipse.jface.action.Separator;
	import org.eclipse.jface.viewers.ColumnLabelProvider;
	import org.eclipse.jface.viewers.ColumnLayoutData;
	import org.eclipse.jface.viewers.ColumnPixelData;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.TableLayout;
	import org.eclipse.jface.viewers.TableViewer;
	import org.eclipse.jface.viewers.TableViewerColumn;
	import org.eclipse.jgit.api.Git;
	import org.eclipse.jgit.lib.Constants;
	import org.eclipse.jgit.lib.PersonIdent;
	import org.eclipse.jgit.lib.Ref;
	import org.eclipse.jgit.revwalk.RevCommit;
	import org.eclipse.papyrus.gitlight.git.ui.Activator;
	import org.eclipse.papyrus.gitlight.git.ui.providers.BranchesContentProvider;
	import org.eclipse.papyrus.gitlight.git.utils.PapyrusFileUtils;
	import org.eclipse.papyrus.gitlight.git.utils.GitConstants;
	import org.eclipse.papyrus.gitlight.git.utils.GitInstance;
	import org.eclipse.papyrus.gitlight.git.utils.GitUtils;
	import org.eclipse.papyrus.infra.core.resource.ModelSet;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.events.ControlListener;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Menu;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.ui.ISelectionListener;
	import org.eclipse.ui.IWorkbenchActionConstants;
	import org.eclipse.ui.IWorkbenchPart;
	import org.eclipse.ui.part.PageBook;
	import org.eclipse.ui.part.ViewPart;
	import org.eclipse.ui.views.properties.IPropertySheetPage;
	import org.eclipse.ui.views.properties.tabbed.ITabbedPropertySheetPageContributor;
	import org.eclipse.uml2.uml.Element;
	import org.eclipse.uml2.uml.NamedElement;

	/**
	* The Reviews view.
	*/
	public class ContributionsView extends ViewPart implements ITabbedPropertySheetPageContributor {

	/**
	* The ID of the view as specified by the extension.
	*/
	public static final String ID = "org.eclipse.papyrus.gitlight.git.ui.contributions.view"; //$NON-NLS-1$

	/**
	* The menu id.
	*/
	public static final String MENU_ID = "org.eclipse.papyrus.gitlight.git.ui.contributions.view.popup"; //$NON-NLS-1$

	/**
	* The used page book.
	*/
	private PageBook pagebook;

	/**
	* The used table viewer for the branches.
	*/
	private TableViewer tableViewer;

	/**
	* The property sheet pages.
	*/
	private List<IPropertySheetPage> propertiesSheetPages = new LinkedList<IPropertySheetPage>();

	/**
	* The page listeners.
	*/
	private final CopyOnWriteArrayList<IContributionsViewPageListener> pageListeners = new CopyOnWriteArrayList<IContributionsViewPageListener>();

	/**
	* The table layout for columns.
	*/
	private AutoResizeTableLayout tableLayout;


	/**
	* The listener we register with the selection service.
	*/
	private ISelectionListener listener = new ISelectionListener() {
	public void selectionChanged(IWorkbenchPart sourcepart, ISelection selection) {
	// we ignore our own selections
	if (sourcepart != ContributionsView.this) {
	showSelection(sourcepart, selection);
	}
	}
	};

	/**
	* Default constructor.
	*/
	public ContributionsView() {
	// Do nothing
	}

	/**
	* Shows the given selection in this view.
	*
	* @param sourcepart
	* The source part workbench.
	* @param selection
	* The selection.
	*/
	public void showSelection(final IWorkbenchPart sourcepart, final ISelection selection) {
	String contentDescription = "Selection is not managed"; //$NON-NLS-1$
	if (selection instanceof IStructuredSelection) {
	final IStructuredSelection structuredSelection = (IStructuredSelection) selection;
	if (structuredSelection.size() == 1) {
	final Element element = getRootElement(structuredSelection.getFirstElement());
	tableViewer.setInput(element);
	if (null != element) {
	if (element instanceof NamedElement) {
	contentDescription = "Contributions for model '" + ((NamedElement) element).getName() + "'"; //$NON-NLS-1$ //$NON-NLS-2$
	}
	}
	pagebook.showPage(tableViewer.getControl());
	}
	}
	setContentDescription(contentDescription);
	}

	/**
	* Get the root of the selected element (it ban be file, EObject, others...).
	*
	* @param selectedObject
	* The selected object.
	* @return The root element or <code>null</code>.
	*/
	protected Element getRootElement(final Object selectedObject) {
	Element result = null;

	// Manage the possible selected file
	final IFile file = PapyrusFileUtils.getFile(selectedObject);
	if (null != file) {
	String fullPath = file.getFullPath().toString();
	URI modelURI = URI.createPlatformResourceURI(fullPath, false);
	if (!"uml".equals(modelURI.fileExtension())) { //$NON-NLS-1$
	modelURI = modelURI.trimFileExtension().appendFileExtension("uml"); //$NON-NLS-1$
	}
	final ModelSet modelSet = new ModelSet();
	final Resource resource = modelSet.getResource(modelURI, true);

	if (null != resource) {
	final EObject root = resource.getContents().get(0);

	if (root instanceof Element) {
	result = (Element) root;
	}
	}
	}

	// Manage other possibilities
	if (null == result && selectedObject instanceof IAdaptable) {
	final Element adapter = ((IAdaptable) selectedObject).getAdapter(Element.class);
	if (null != adapter) {
	result = adapter.getModel();
	}
	}

	return result;
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets.Composite)
	*/
	@Override
	public void createPartControl(final Composite parent) {
	pagebook = new PageBook(parent, SWT.NONE);

	tableViewer = new TableViewer(pagebook, SWT.SINGLE \| SWT.FULL_SELECTION \| SWT.V_SCROLL \| SWT.H_SCROLL \| SWT.BORDER);
	tableViewer.getTable().setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
	tableViewer.setContentProvider(new BranchesContentProvider(true));
	tableViewer.getTable().setHeaderVisible(true);
	tableViewer.getTable().setLinesVisible(true);

	// Initialize the columns layout data
	tableLayout = new AutoResizeTableLayout(tableViewer.getTable());
	tableViewer.getTable().setLayout(tableLayout);

	// Create the columns
	createReviewDateColumn();
	createReviewVersionColumn();
	createReviewAuthorColumn();
	createReviewCommentColumn();

	final MenuManager menuManager = new MenuManager("#PopupMenu"); //$NON-NLS-1$
	menuManager.setRemoveAllWhenShown(true);
	menuManager.addMenuListener(new IMenuListener() {

	public void menuAboutToShow(IMenuManager manager) {
	manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
	}

	});

	final Menu menu = menuManager.createContextMenu(tableViewer.getTable());
	tableViewer.getTable().setMenu(menu);
	getSite().registerContextMenu(MENU_ID, menuManager, tableViewer);

	// Provider the table selection
	getSite().setSelectionProvider(tableViewer);

	// Add the selection listener
	getSite().getWorkbenchWindow().getSelectionService().addSelectionListener(listener);
	}

	/**
	* This allows to create the date column.
	*/
	protected void createReviewDateColumn() {
	final TableViewerColumn dateColumn = new TableViewerColumn(tableViewer, SWT.NONE);
	dateColumn.getColumn().setText("Date"); //$NON-NLS-1$
	dateColumn.getColumn().setWidth(150);
	dateColumn.getColumn().setResizable(true);
	tableLayout.addColumnData(new ColumnWeightData(150, 100, true));
	dateColumn.setLabelProvider(new ColumnLabelProvider() {

	/**
	* @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
	*
	* @param element
	* @return
	*/
	@Override
	public String getText(Object element) {
	if (element instanceof Ref) {
	final Git git = GitInstance.getInstance().getGit();
	final RevCommit lastCommit = GitUtils.getLastCommitOfBranch(git, (Ref) element);
	PersonIdent authorIdent = lastCommit.getAuthorIdent();
	Date authorDate = authorIdent.getWhen();
	SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); //$NON-NLS-1$
	return dateFormat.format(authorDate);
	}
	return "Not specified"; //$NON-NLS-1$
	}
	});
	}

	/**
	* This allows to create the version column.
	*/
	protected void createReviewVersionColumn() {
	final TableViewerColumn versionColumn = new TableViewerColumn(tableViewer, SWT.NONE);
	versionColumn.getColumn().setText("Version"); //$NON-NLS-1$
	versionColumn.getColumn().setWidth(100);
	versionColumn.getColumn().setResizable(true);
	tableLayout.addColumnData(new ColumnWeightData(100, 50, true));
	versionColumn.setLabelProvider(new ColumnLabelProvider() {

	/**
	* @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
	*
	* @param element
	* @return
	*/
	@Override
	public String getText(Object element) {
	if (element instanceof Ref) {
	final String name = ((Ref) element).getName();
	if (name.contains(GitConstants.CONTRIBUTION_BRANCH_PREFIX) && name.length() > (GitConstants.CONTRIBUTION_BRANCH_PREFIX.length() + 18)) {
	// 18 is the number of character for the unique identifier generated from the date (it is always the same size)
	return name.substring(name.indexOf(GitConstants.CONTRIBUTION_BRANCH_PREFIX) + GitConstants.CONTRIBUTION_BRANCH_PREFIX.length() + 18);
	}
	return name;
	}
	return "Not specified"; //$NON-NLS-1$
	}
	});
	}

	/**
	* This allows to create the author column.
	*/
	protected void createReviewAuthorColumn() {
	final TableViewerColumn authorColumn = new TableViewerColumn(tableViewer, SWT.NONE);
	authorColumn.getColumn().setText("Author"); //$NON-NLS-1$
	authorColumn.getColumn().setWidth(200);
	authorColumn.getColumn().setResizable(true);
	tableLayout.addColumnData(new ColumnWeightData(200, 100, true));
	authorColumn.setLabelProvider(new ColumnLabelProvider() {

	/**
	* @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
	*
	* @param element
	* @return
	*/
	@Override
	public String getText(Object element) {
	if (element instanceof Ref) {
	final Git git = GitInstance.getInstance().getGit();
	final RevCommit lastCommit = GitUtils.getLastCommitOfBranch(git, (Ref) element);

	String author = null;
	if (lastCommit.getFullMessage().contains(Constants.SIGNED_OFF_BY_TAG)) {
	try {
	final String subSignedOff = lastCommit.getFullMessage().substring(lastCommit.getFullMessage().indexOf(Constants.SIGNED_OFF_BY_TAG) + Constants.SIGNED_OFF_BY_TAG.length());
	author = subSignedOff.contains("\n") ? subSignedOff.substring(0, subSignedOff.indexOf("\n")) : subSignedOff; //$NON-NLS-1$ //$NON-NLS-2$
	} catch (Exception e) {
	// Do nothing
	}
	}
	if (null == author \|\| author.isEmpty()) {
	author = lastCommit.getAuthorIdent().getName();
	}

	return author;
	}
	return "Unknown"; //$NON-NLS-1$
	}
	});
	}

	/**
	* This allows to create the comment column.
	*/
	protected void createReviewCommentColumn() {
	final TableViewerColumn commentColumn = new TableViewerColumn(tableViewer, SWT.NONE);
	commentColumn.getColumn().setText("Comment"); //$NON-NLS-1$
	commentColumn.getColumn().setWidth(600);
	commentColumn.getColumn().setResizable(true);
	tableLayout.addColumnData(new ColumnPixelData(600, true));
	commentColumn.setLabelProvider(new ColumnLabelProvider() {

	/**
	* @see org.eclipse.jface.viewers.ColumnLabelProvider#getText(java.lang.Object)
	*
	* @param element
	* @return
	*/
	@Override
	public String getText(Object element) {
	if (element instanceof Ref) {
	final Git git = GitInstance.getInstance().getGit();
	final RevCommit lastCommit = GitUtils.getLastCommitOfBranch(git, (Ref) element);
	return lastCommit.getShortMessage();
	}
	return "Not specified"; //$NON-NLS-1$
	}
	});
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.ui.part.WorkbenchPart#setFocus()
	*/
	@Override
	public void setFocus() {
	pagebook.setFocus();
	firePageActivated();
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.ui.part.WorkbenchPart#getAdapter(java.lang.Class)
	*/
	@SuppressWarnings("unchecked")
	@Override
	public Object getAdapter(@SuppressWarnings("rawtypes") Class adapter) {

	if (IPropertySheetPage.class == adapter) {
	// Do not test if tabbedPropertySheetPage is null before calling new
	// this is managed by Eclipse which only call current method when necessary
	return getPropertySheetPage();
	}

	return super.getAdapter(adapter);
	}

	/**
	* This allows to define the property sheet page associated to this view.
	*
	* @return The property sheet page.
	*/
	private IPropertySheetPage getPropertySheetPage() {
	IPropertySheetPage propertySheetPage = new ContributionsPropertySheetPage(this);
	propertiesSheetPages.add(propertySheetPage);
	return propertySheetPage;
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.ui.part.WorkbenchPart#dispose()
	*/
	@Override
	public void dispose() {
	// important: We need do unregister our listener when the view is disposed
	getSite().getWorkbenchWindow().getSelectionService().removeSelectionListener(listener);

	for (final IPropertySheetPage page : propertiesSheetPages) {
	page.dispose();
	}
	propertiesSheetPages.clear();
	super.dispose();
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.ui.views.properties.tabbed.ITabbedPropertySheetPageContributor#getContributorId()
	*/
	@Override
	public String getContributorId() {
	return "TreeOutlinePage"; //$NON-NLS-1$
	}

	/**
	* This allows to add a page listener.
	*
	* @param listener
	* The page listener to add.
	*/
	void addPageListener(final IContributionsViewPageListener listener) {
	pageListeners.addIfAbsent(listener);
	}

	/**
	* This allows to remove a page listener.
	*
	* @param listener
	* The page listener to remove.
	*/
	void removePageListener(final IContributionsViewPageListener listener) {
	pageListeners.remove(listener);
	}

	/**
	* This allows to call the activated pages.
	*/
	private void firePageActivated() {
	for (final IContributionsViewPageListener next : pageListeners) {
	try {
	next.pageActivated(this);
	} catch (Exception e) {
	Activator.getLogHelper().error("Uncaught exception in page activation listener.", e); //$NON-NLS-1$
	}
	}
	}

	/**
	* This class allows to manage correctly the columns in the table viewer.
	*/
	public class AutoResizeTableLayout extends TableLayout implements ControlListener {

	/**
	* The table to manage.
	*/
	private final Table table;

	/**
	* The columns layout data.
	*/
	private List<ColumnLayoutData> columns = new ArrayList<ColumnLayoutData>();

	/**
	* This manage the auto sizing of the columns.
	*/
	private boolean autosizing = false;

	/**
	* Default constructor.
	*
	* @param table
	* The table to manage.
	*/
	public AutoResizeTableLayout(final Table table) {
	this.table = table;
	table.addControlListener(this);
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.jface.viewers.TableLayout#addColumnData(org.eclipse.jface.viewers.ColumnLayoutData)
	*/
	@Override
	public void addColumnData(final ColumnLayoutData data) {
	columns.add(data);
	super.addColumnData(data);
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.ControlListener#controlMoved(org.eclipse.swt.events.ControlEvent)
	*/
	@Override
	public void controlMoved(final ControlEvent e) {
	// Do nothing
	}

	/**
	* {@inheritDoc}
	*
	* @see org.eclipse.swt.events.ControlListener#controlResized(org.eclipse.swt.events.ControlEvent)
	*/
	@Override
	public void controlResized(final ControlEvent e) {
	if (autosizing)
	return;
	autosizing = true;
	try {
	autoSizeColumns();
	} finally {
	autosizing = false;
	}
	}

	/**
	* This allows to auto resize the columns depending to the space available.
	*/
	private void autoSizeColumns() {
	int width = table.getClientArea().width;

	// Layout is being called with an invalid value the first time it is being called on Linux.
	// This method resets the layout to null, so we run it only when the value is OK.
	if (width <= 1) {
	return;
	}

	final TableColumn[] tableColumns = table.getColumns();
	int size = Math.min(columns.size(), tableColumns.length);
	int[] widths = new int[size];
	int fixedWidth = 0;
	int numberOfWeightColumns = 0;
	int totalWeight = 0;

	// First calc space occupied by fixed columns.
	for (int i = 0; i < size; i++) {
	final ColumnLayoutData col = columns.get(i);
	if (col instanceof ColumnPixelData) {
	int pixels = ((ColumnPixelData) col).width;
	widths[i] = pixels;
	fixedWidth += pixels;
	} else if (col instanceof ColumnWeightData) {
	final ColumnWeightData cw = (ColumnWeightData) col;
	numberOfWeightColumns++;
	int weight = cw.weight;
	totalWeight += weight;
	} else {
	throw new IllegalStateException("Unknown column layout data");
	}
	}

	// Do we have columns that have a weight?
	if (numberOfWeightColumns > 0) {
	// Now, distribute the rest to the columns with weight.
	// Make sure there's enough room, even if we have to scroll.
	if (width < fixedWidth + totalWeight) {
	width = fixedWidth + totalWeight;
	}
	int rest = width - fixedWidth;
	int totalDistributed = 0;
	for (int i = 0; i < size; i++) {
	final ColumnLayoutData col = columns.get(i);
	if (col instanceof ColumnWeightData) {
	final ColumnWeightData cw = (ColumnWeightData) col;
	int weight = cw.weight;
	int pixels = totalWeight == 0 ? 0 : weight * rest / totalWeight;
	if (pixels < cw.minimumWidth) {
	pixels = cw.minimumWidth;
	}
	totalDistributed += pixels;
	widths[i] = pixels;
	}
	}

	// Distribute any remaining pixels to columns with weight.
	int diff = rest - totalDistributed;
	for (int i = 0; diff > 0; i++) {
	if (i == size) {
	i = 0;
	}
	final ColumnLayoutData col = columns.get(i);
	if (col instanceof ColumnWeightData) {
	++widths[i];
	--diff;
	}
	}
	}

	for (int i = 0; i < size; i++) {
	if (tableColumns[i].getWidth() != widths[i]) {
	tableColumns[i].setWidth(widths[i]);
	}
	}
	}
	}

	}