org.eclipse.egerrit.ui/src/org/eclipse/egerrit/internal/ui/tabs/MessageTabView.java - egerrit/org.eclipse.egerrit - Git at Google

 /*******************************************************************************
  * Copyright (c) 2015 Ericsson AB.
  * 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
  *
  * Contributors:
  *     Jacques Bouthillier - initial API and implementation
  *******************************************************************************/

 package org.eclipse.egerrit.internal.ui.tabs;

 import java.text.SimpleDateFormat;
 import java.util.Iterator;

 import org.eclipse.core.databinding.DataBindingContext;
 import org.eclipse.core.databinding.UpdateValueStrategy;
 import org.eclipse.core.databinding.observable.list.IObservableList;
 import org.eclipse.core.databinding.observable.value.ComputedValue;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 import org.eclipse.egerrit.internal.core.EGerritCorePlugin;
 import org.eclipse.egerrit.internal.core.GerritClient;
 import org.eclipse.egerrit.internal.core.command.ChangeCommitMsgCommand;
 import org.eclipse.egerrit.internal.core.command.PublishChangeEditCommand;
 import org.eclipse.egerrit.internal.core.exception.EGerritException;
 import org.eclipse.egerrit.internal.core.rest.ChangeEditMessageInput;
 import org.eclipse.egerrit.internal.model.ChangeInfo;
 import org.eclipse.egerrit.internal.model.CommitInfo;
 import org.eclipse.egerrit.internal.model.ModelPackage;
 import org.eclipse.egerrit.internal.ui.editors.ModelLoader;
 import org.eclipse.egerrit.internal.ui.utils.DataConverter;
 import org.eclipse.egerrit.internal.ui.utils.EGerritConstants;
 import org.eclipse.egerrit.internal.ui.utils.LinkDashboard;
 import org.eclipse.egerrit.internal.ui.utils.Messages;
 import org.eclipse.egerrit.internal.ui.utils.UIUtils;
 import org.eclipse.emf.databinding.EMFObservables;
 import org.eclipse.emf.databinding.EMFProperties;
 import org.eclipse.emf.databinding.FeaturePath;
 import org.eclipse.jface.databinding.swt.WidgetProperties;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.custom.ScrolledComposite;
 import org.eclipse.swt.events.ControlAdapter;
 import org.eclipse.swt.events.ControlEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Point;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Link;
 import org.eclipse.swt.widgets.TabFolder;
 import org.eclipse.swt.widgets.TabItem;
 import org.eclipse.swt.widgets.Text;

 /**
  * This class is used in the editor to handle the Gerrit message view
  *
  * @since 1.0
  */
 public class MessageTabView {

 	private Text msgTextData;

 	private Link msgAuthorData;

 	private Label msgDatePushData;

 	private Link msgCommitterData;

 	private Label msgDatecommitterData;

 	private Link msgCommitidData;

 	private Label msgParentIdData;

 	private Link msgChangeIdData;

 	private final SimpleDateFormat formatTimeOut = new SimpleDateFormat("MMM d, yyyy  hh:mm a"); //$NON-NLS-1$

 	private GerritClient fGerritClient;

 	private ChangeInfo fChangeInfo;

 	private Boolean fShowExtraInfo = true;

 	private DataBindingContext bindingContext = new DataBindingContext();

 	private ObservableCollector observableCollector;

 	// ------------------------------------------------------------------------
 	// Constructor and life cycle
 	// ------------------------------------------------------------------------

 	/**
 	 * The constructor.
 	 *
 	 * @param changeInfo
 	 * @param gerritClient
 	 */
 	public MessageTabView(GerritClient gerritClient, ChangeInfo changeInfo) {
 		fGerritClient = gerritClient;
 		fChangeInfo = changeInfo;
 	}

 	/**
 	 * @param GerritClient
 	 * @param Composite
 	 * @param ChangeInfo
 	 */
 	public void create(Composite tabFolder) {

 		createControls(tabFolder);
 	}

 	private boolean isEditingAllowed() {
 		return !fGerritClient.getRepository().getServerInfo().isAnonymous();
 	}

 	/**
 	 * Create the top parent as a tab folder
 	 *
 	 * @param tabFolder
 	 * @return Composite
 	 */
 	private Composite createAsTabfolder(Composite tabFolder) {
 		final TabItem tabMessages = new TabItem((TabFolder) tabFolder, SWT.NONE);
 		tabMessages.setText(Messages.MessageTabView_1);

 		final Composite messagesComposite = new Composite(tabFolder, SWT.NONE);
 		tabMessages.setControl(messagesComposite);
 		messagesComposite.setLayout(new GridLayout(4, false));
 		return messagesComposite;
 	}

 	/**
 	 * Create the top parent as a composite
 	 *
 	 * @param tabFolder
 	 * @return Composite
 	 */
 	private Composite createAsComposite(Composite parent) {

 		final ScrolledComposite scrollComposite = new ScrolledComposite(parent, SWT.V_SCROLL | SWT.H_SCROLL);

 		final Composite messagesComposite = new Composite(scrollComposite, SWT.NONE);
 		messagesComposite.setLayout(new GridLayout(4, false));

 		scrollComposite.setContent(messagesComposite);
 		scrollComposite.setExpandVertical(true);
 		scrollComposite.setExpandHorizontal(true);
 		scrollComposite.addControlListener(new ControlAdapter() {
 			@Override
 			public void controlResized(ControlEvent e) {
 				scrollComposite.setMinSize(messagesComposite.computeSize(SWT.DEFAULT, SWT.DEFAULT));
 			}
 		});

 		//Do not show the Extra data
 		fShowExtraInfo = false;
 		return messagesComposite;
 	}

 	private void createControls(Composite composite) {
 		final Composite messagesComposite;

 		//Define the proper instance of the composite, i.e. Tabfolder or anything else
 		if (composite instanceof TabFolder) {
 			messagesComposite = createAsTabfolder(composite);
 		} else {
 			messagesComposite = createAsComposite(composite);
 		}

 		msgTextData = new Text(messagesComposite, SWT.BORDER | SWT.WRAP | SWT.MULTI | SWT.V_SCROLL);
 		GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true, 4, 1);
 		Point fontsize = UIUtils.computeFontSize(messagesComposite);
 		gridData.minimumHeight = fontsize.y * 3;//Set a minimum height to 3 lines
 		msgTextData.setLayoutData(gridData);
 		msgTextData.setEditable(isEditingAllowed());

 		final Button btnCancel = new Button(messagesComposite, SWT.NONE);
 		GridData gdBtnCancel = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
 		btnCancel.setLayoutData(gdBtnCancel);
 		btnCancel.setText(Messages.MessageTabView_2);
 		btnCancel.setEnabled(false);

 		final Button fBtnSave = new Button(messagesComposite, SWT.NONE);
 		GridData gdBtnSave = new GridData(SWT.LEFT, SWT.TOP, false, false, 3, 1);
 		fBtnSave.setLayoutData(gdBtnSave);
 		fBtnSave.setText(Messages.MessageTabView_3);
 		fBtnSave.setEnabled(false);

 		if (isEditingAllowed()) {
 			btnCancel.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					msgTextData.setText(fChangeInfo.getUserSelectedRevision().getCommit().getMessage());
 					fBtnSave.setEnabled(false);
 					btnCancel.setEnabled(false);
 				}
 			});
 		}

 		if (isEditingAllowed()) {
 			ModifyListener textModifiedListener = event -> {
 				if (fChangeInfo.getUserSelectedRevision() != null && fChangeInfo.getUserSelectedRevision()
 						.getCommit()
 						.getMessage()
 						.compareTo(msgTextData.getText()) != 0) {
 					fBtnSave.setEnabled(true);
 					btnCancel.setEnabled(true);
 				} else {
 					fBtnSave.setEnabled(false);
 					btnCancel.setEnabled(false);
 				}
 			};
 			msgTextData.addModifyListener(textModifiedListener);
 		}

 		if (fShowExtraInfo) {
 			//LINE 1 - Author: <authorname> date
 			Label lblAuthor = new Label(messagesComposite, SWT.NONE);
 			lblAuthor.setText(Messages.MessageTabView_4);
 			lblAuthor.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

 			msgAuthorData = new Link(messagesComposite, SWT.NONE);
 			msgAuthorData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));
 			msgAuthorData.setToolTipText(Messages.MessageTabView_7);
 			msgAuthorData.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					LinkDashboard linkDash = new LinkDashboard(fGerritClient);
 					//Need to put the text in quotes since there might be some empty spaces or special char in the user name
 					linkDash.invokeRefreshDashboardCommand(EGerritConstants.OWNER,
 							"\"" + e.text + "\"" + " status:open"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
 				}
 			});

 			msgDatePushData = new Label(messagesComposite, SWT.NONE);
 			msgDatePushData.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 2, 1));

 			//LINE 2 - Committer: <committername> date
 			Label lblCommitter = new Label(messagesComposite, SWT.NONE);
 			lblCommitter.setText(Messages.MessageTabView_5);
 			lblCommitter.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

 			msgCommitterData = new Link(messagesComposite, SWT.NONE);
 			msgCommitterData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));
 			msgCommitterData.setToolTipText(Messages.MessageTabView_10);
 			msgCommitterData.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					LinkDashboard linkDash = new LinkDashboard(fGerritClient);
 					//Need to put the text in quotes since there might be some empty spaces or special char in the user name
 					linkDash.invokeRefreshDashboardCommand(EGerritConstants.OWNER,
 							"\"" + e.text + "\"" + " status:open"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
 				}
 			});

 			msgDatecommitterData = new Label(messagesComposite, SWT.NONE);
 			GridData gdDateCommitter = new GridData(SWT.RIGHT, SWT.CENTER, false, false, 2, 1);
 			msgDatecommitterData.setLayoutData(gdDateCommitter);

 			//LINE 3 - Commit: <commitId>
 			Label lblCommit = new Label(messagesComposite, SWT.NONE);
 			lblCommit.setText(Messages.MessageTabView_6);
 			lblCommit.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

 			msgCommitidData = new Link(messagesComposite, SWT.NONE);
 			msgCommitidData.setToolTipText(Messages.MessageTabView_11);
 			msgCommitidData.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					LinkDashboard linkDash = new LinkDashboard(fGerritClient);
 					linkDash.invokeRefreshDashboardCommand("", e.text); //$NON-NLS-1$
 				}
 			});

 			msgCommitidData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 3, 1));

 			//LINE 4 - Parents: <parentId>
 			Label lblParents = new Label(messagesComposite, SWT.NONE);
 			lblParents.setText(Messages.MessageTabView_8);
 			lblParents.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

 			msgParentIdData = new Label(messagesComposite, SWT.NONE);
 			msgParentIdData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 3, 1));

 			//LINE 5 - ChangeId: <id>
 			Label lblChangeid = new Label(messagesComposite, SWT.NONE);
 			lblChangeid.setText(Messages.MessageTabView_9);
 			lblChangeid.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

 			msgChangeIdData = new Link(messagesComposite, SWT.NONE);
 			msgChangeIdData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 3, 1));
 			msgChangeIdData.setToolTipText(Messages.MessageTabView_12);
 			msgChangeIdData.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					LinkDashboard linkDash = new LinkDashboard(fGerritClient);
 					linkDash.invokeRefreshDashboardCommand("", e.text); //$NON-NLS-1$
 				}
 			});
 		}

 		if (isEditingAllowed()) {
 			fBtnSave.addSelectionListener(new SelectionAdapter() {
 				/**
 				 *
 				 */
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					super.widgetSelected(e);
 					ChangeCommitMsgCommand editMessageCmd = fGerritClient.editMessage(fChangeInfo.getId());
 					ChangeEditMessageInput changeEditMessageInput = new ChangeEditMessageInput();
 					changeEditMessageInput.setMessage(msgTextData.getText());
 					editMessageCmd.setCommandInput(changeEditMessageInput);
 					PublishChangeEditCommand publishChangeEditCmd = fGerritClient
 							.publishChangeEdit(fChangeInfo.getId());

 					try {
 						editMessageCmd.call();
 						publishChangeEditCmd.call();
 					} catch (EGerritException e3) {
 						EGerritCorePlugin
 								.logError(fGerritClient.getRepository().formatGerritVersion() + e3.getMessage());
 					}
 					fBtnSave.setEnabled(false);
 					btnCancel.setEnabled(false);
 					ModelLoader loader = ModelLoader.initialize(fGerritClient, fChangeInfo);
 					loader.loadBasicInformation(false);
 					loader.dispose();
 				}
 			});
 		}

 		if (fShowExtraInfo) {
 			new Label(messagesComposite, SWT.NONE);
 		}

 		//Set the binding for this section
 		msgTabDataBindings();
 	}

 	private void msgTabDataBindings() {
 		bindCommitMessage();
 		if (!fShowExtraInfo) {
 			observableCollector = new ObservableCollector(bindingContext);
 			return;// Do not bind any other functionality when not shown
 		}

 		bindComitAuthor();
 		bindCommitDate();
 		bindCommitterName();
 		bindCommitterDate();
 		bindCommitId();
 		bindCommitParents();
 		bindChangeId();
 		observableCollector = new ObservableCollector(bindingContext);
 	}

 	/**
 	 *
 	 */
 	private void bindChangeId() {
 		//Show change id
 		IObservableValue<String> msgChangeIdDataValue = EMFObservables.observeValue(fChangeInfo,
 				ModelPackage.Literals.CHANGE_INFO__CHANGE_ID);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgChangeIdData), msgChangeIdDataValue, null,
 				new UpdateValueStrategy().setConverter(DataConverter.linkText()));
 	}

 	/**
 	 *
 	 */
 	private void bindCommitParents() {
 		//show commit parents
 		FeaturePath commitParents = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__REVISION,
 				ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__PARENTS);
 		final IObservableList parents = EMFProperties.list(commitParents).observe(fChangeInfo);
 		ComputedValue<String> parentCommitsAsString = new ComputedValue<String>() {
 			@Override
 			protected String calculate() {
 				Iterator it = parents.iterator();
 				StringBuilder result = new StringBuilder();
 				while (it.hasNext()) {
 					CommitInfo info = (CommitInfo) it.next();
 					result.append(info.getCommit());
 					result.append(" "); //$NON-NLS-1$
 				}
 				return result.toString().trim();
 			}
 		};
 		bindingContext.bindValue(WidgetProperties.text().observe(msgParentIdData), parentCommitsAsString, null, null);
 	}

 	/**
 	 *
 	 */
 	private void bindCommitId() {
 		//show commit id
 		final FeaturePath commitId = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__REVISION,
 				ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__COMMIT);
 		IObservableValue<String> msgCommitidDataValue = EMFProperties.value(commitId).observe(fChangeInfo);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgCommitidData), msgCommitidDataValue, null,
 				new UpdateValueStrategy().setConverter(DataConverter.linkText()));
 	}

 	/**
 	 *
 	 */
 	private void bindCommitterDate() {
 		//Show committer date
 		final FeaturePath commiterDate = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION,
 				ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__COMMITTER,
 				ModelPackage.Literals.GIT_PERSON_INFO__DATE);
 		IObservableValue<String> msgCommitterDateDataValue = EMFProperties.value(commiterDate).observe(fChangeInfo);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgDatecommitterData), msgCommitterDateDataValue, null,
 				new UpdateValueStrategy().setConverter(DataConverter.gerritTimeConverter(formatTimeOut)));
 	}

 	/**
 	 *
 	 */
 	private void bindCommitterName() {
 		//Show committer name
 		final FeaturePath committerName = FeaturePath.fromList(
 				ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION, ModelPackage.Literals.REVISION_INFO__COMMIT,
 				ModelPackage.Literals.COMMIT_INFO__COMMITTER);
 		IObservableValue<String> msgCommitterDataValue = EMFProperties.value(committerName).observe(fChangeInfo);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgCommitterData), msgCommitterDataValue, null,
 				new UpdateValueStrategy().setConverter(DataConverter.gitPersonConverter()));
 	}

 	/**
 	 *
 	 */
 	private void bindCommitDate() {
 		final FeaturePath commitDate = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION,
 				ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__AUTHOR,
 				ModelPackage.Literals.GIT_PERSON_INFO__DATE);
 		IObservableValue<String> msgAuthorDateDataValue = EMFProperties.value(commitDate).observe(fChangeInfo);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgDatePushData), msgAuthorDateDataValue, null,
 				new UpdateValueStrategy().setConverter(DataConverter.gerritTimeConverter(formatTimeOut)));
 	}

 	/**
 	 *
 	 */
 	private void bindComitAuthor() {
 		//show commit author
 		final FeaturePath authorName = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION,
 				ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__AUTHOR);
 		IObservableValue<String> msgAuthorDataValue = EMFProperties.value(authorName).observe(fChangeInfo);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgAuthorData), msgAuthorDataValue, null,
 				new UpdateValueStrategy().setConverter(DataConverter.gitPersonConverter()));
 	}

 	/**
 	 *
 	 */
 	private void bindCommitMessage() {
 		//the commit message
 		final FeaturePath commitMessage = FeaturePath.fromList(
 				ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION, ModelPackage.Literals.REVISION_INFO__COMMIT,
 				ModelPackage.Literals.COMMIT_INFO__MESSAGE);
 		IObservableValue<String> msgTextDataValue = EMFProperties.value(commitMessage).observe(fChangeInfo);
 		bindingContext.bindValue(WidgetProperties.text().observe(msgTextData), msgTextDataValue, null, null);

 	}

 	public void dispose() {
 		observableCollector.dispose();
 		bindingContext.dispose();
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2015 Ericsson AB.
	* 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
	*
	* Contributors:
	* Jacques Bouthillier - initial API and implementation
	*******************************************************************************/

	package org.eclipse.egerrit.internal.ui.tabs;

	import java.text.SimpleDateFormat;
	import java.util.Iterator;

	import org.eclipse.core.databinding.DataBindingContext;
	import org.eclipse.core.databinding.UpdateValueStrategy;
	import org.eclipse.core.databinding.observable.list.IObservableList;
	import org.eclipse.core.databinding.observable.value.ComputedValue;
	import org.eclipse.core.databinding.observable.value.IObservableValue;
	import org.eclipse.egerrit.internal.core.EGerritCorePlugin;
	import org.eclipse.egerrit.internal.core.GerritClient;
	import org.eclipse.egerrit.internal.core.command.ChangeCommitMsgCommand;
	import org.eclipse.egerrit.internal.core.command.PublishChangeEditCommand;
	import org.eclipse.egerrit.internal.core.exception.EGerritException;
	import org.eclipse.egerrit.internal.core.rest.ChangeEditMessageInput;
	import org.eclipse.egerrit.internal.model.ChangeInfo;
	import org.eclipse.egerrit.internal.model.CommitInfo;
	import org.eclipse.egerrit.internal.model.ModelPackage;
	import org.eclipse.egerrit.internal.ui.editors.ModelLoader;
	import org.eclipse.egerrit.internal.ui.utils.DataConverter;
	import org.eclipse.egerrit.internal.ui.utils.EGerritConstants;
	import org.eclipse.egerrit.internal.ui.utils.LinkDashboard;
	import org.eclipse.egerrit.internal.ui.utils.Messages;
	import org.eclipse.egerrit.internal.ui.utils.UIUtils;
	import org.eclipse.emf.databinding.EMFObservables;
	import org.eclipse.emf.databinding.EMFProperties;
	import org.eclipse.emf.databinding.FeaturePath;
	import org.eclipse.jface.databinding.swt.WidgetProperties;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.custom.ScrolledComposite;
	import org.eclipse.swt.events.ControlAdapter;
	import org.eclipse.swt.events.ControlEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Point;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Link;
	import org.eclipse.swt.widgets.TabFolder;
	import org.eclipse.swt.widgets.TabItem;
	import org.eclipse.swt.widgets.Text;

	/**
	* This class is used in the editor to handle the Gerrit message view
	*
	* @since 1.0
	*/
	public class MessageTabView {

	private Text msgTextData;

	private Link msgAuthorData;

	private Label msgDatePushData;

	private Link msgCommitterData;

	private Label msgDatecommitterData;

	private Link msgCommitidData;

	private Label msgParentIdData;

	private Link msgChangeIdData;

	private final SimpleDateFormat formatTimeOut = new SimpleDateFormat("MMM d, yyyy hh:mm a"); //$NON-NLS-1$

	private GerritClient fGerritClient;

	private ChangeInfo fChangeInfo;

	private Boolean fShowExtraInfo = true;

	private DataBindingContext bindingContext = new DataBindingContext();

	private ObservableCollector observableCollector;

	// ------------------------------------------------------------------------
	// Constructor and life cycle
	// ------------------------------------------------------------------------

	/**
	* The constructor.
	*
	* @param changeInfo
	* @param gerritClient
	*/
	public MessageTabView(GerritClient gerritClient, ChangeInfo changeInfo) {
	fGerritClient = gerritClient;
	fChangeInfo = changeInfo;
	}

	/**
	* @param GerritClient
	* @param Composite
	* @param ChangeInfo
	*/
	public void create(Composite tabFolder) {

	createControls(tabFolder);
	}

	private boolean isEditingAllowed() {
	return !fGerritClient.getRepository().getServerInfo().isAnonymous();
	}

	/**
	* Create the top parent as a tab folder
	*
	* @param tabFolder
	* @return Composite
	*/
	private Composite createAsTabfolder(Composite tabFolder) {
	final TabItem tabMessages = new TabItem((TabFolder) tabFolder, SWT.NONE);
	tabMessages.setText(Messages.MessageTabView_1);

	final Composite messagesComposite = new Composite(tabFolder, SWT.NONE);
	tabMessages.setControl(messagesComposite);
	messagesComposite.setLayout(new GridLayout(4, false));
	return messagesComposite;
	}

	/**
	* Create the top parent as a composite
	*
	* @param tabFolder
	* @return Composite
	*/
	private Composite createAsComposite(Composite parent) {

	final ScrolledComposite scrollComposite = new ScrolledComposite(parent, SWT.V_SCROLL \| SWT.H_SCROLL);

	final Composite messagesComposite = new Composite(scrollComposite, SWT.NONE);
	messagesComposite.setLayout(new GridLayout(4, false));

	scrollComposite.setContent(messagesComposite);
	scrollComposite.setExpandVertical(true);
	scrollComposite.setExpandHorizontal(true);
	scrollComposite.addControlListener(new ControlAdapter() {
	@Override
	public void controlResized(ControlEvent e) {
	scrollComposite.setMinSize(messagesComposite.computeSize(SWT.DEFAULT, SWT.DEFAULT));
	}
	});

	//Do not show the Extra data
	fShowExtraInfo = false;
	return messagesComposite;
	}

	private void createControls(Composite composite) {
	final Composite messagesComposite;

	//Define the proper instance of the composite, i.e. Tabfolder or anything else
	if (composite instanceof TabFolder) {
	messagesComposite = createAsTabfolder(composite);
	} else {
	messagesComposite = createAsComposite(composite);
	}

	msgTextData = new Text(messagesComposite, SWT.BORDER \| SWT.WRAP \| SWT.MULTI \| SWT.V_SCROLL);
	GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true, 4, 1);
	Point fontsize = UIUtils.computeFontSize(messagesComposite);
	gridData.minimumHeight = fontsize.y * 3;//Set a minimum height to 3 lines
	msgTextData.setLayoutData(gridData);
	msgTextData.setEditable(isEditingAllowed());

	final Button btnCancel = new Button(messagesComposite, SWT.NONE);
	GridData gdBtnCancel = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	btnCancel.setLayoutData(gdBtnCancel);
	btnCancel.setText(Messages.MessageTabView_2);
	btnCancel.setEnabled(false);

	final Button fBtnSave = new Button(messagesComposite, SWT.NONE);
	GridData gdBtnSave = new GridData(SWT.LEFT, SWT.TOP, false, false, 3, 1);
	fBtnSave.setLayoutData(gdBtnSave);
	fBtnSave.setText(Messages.MessageTabView_3);
	fBtnSave.setEnabled(false);

	if (isEditingAllowed()) {
	btnCancel.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	msgTextData.setText(fChangeInfo.getUserSelectedRevision().getCommit().getMessage());
	fBtnSave.setEnabled(false);
	btnCancel.setEnabled(false);
	}
	});
	}

	if (isEditingAllowed()) {
	ModifyListener textModifiedListener = event -> {
	if (fChangeInfo.getUserSelectedRevision() != null && fChangeInfo.getUserSelectedRevision()
	.getCommit()
	.getMessage()
	.compareTo(msgTextData.getText()) != 0) {
	fBtnSave.setEnabled(true);
	btnCancel.setEnabled(true);
	} else {
	fBtnSave.setEnabled(false);
	btnCancel.setEnabled(false);
	}
	};
	msgTextData.addModifyListener(textModifiedListener);
	}

	if (fShowExtraInfo) {
	//LINE 1 - Author: <authorname> date
	Label lblAuthor = new Label(messagesComposite, SWT.NONE);
	lblAuthor.setText(Messages.MessageTabView_4);
	lblAuthor.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

	msgAuthorData = new Link(messagesComposite, SWT.NONE);
	msgAuthorData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));
	msgAuthorData.setToolTipText(Messages.MessageTabView_7);
	msgAuthorData.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	LinkDashboard linkDash = new LinkDashboard(fGerritClient);
	//Need to put the text in quotes since there might be some empty spaces or special char in the user name
	linkDash.invokeRefreshDashboardCommand(EGerritConstants.OWNER,
	"\"" + e.text + "\"" + " status:open"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
	}
	});

	msgDatePushData = new Label(messagesComposite, SWT.NONE);
	msgDatePushData.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 2, 1));

	//LINE 2 - Committer: <committername> date
	Label lblCommitter = new Label(messagesComposite, SWT.NONE);
	lblCommitter.setText(Messages.MessageTabView_5);
	lblCommitter.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

	msgCommitterData = new Link(messagesComposite, SWT.NONE);
	msgCommitterData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));
	msgCommitterData.setToolTipText(Messages.MessageTabView_10);
	msgCommitterData.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	LinkDashboard linkDash = new LinkDashboard(fGerritClient);
	//Need to put the text in quotes since there might be some empty spaces or special char in the user name
	linkDash.invokeRefreshDashboardCommand(EGerritConstants.OWNER,
	"\"" + e.text + "\"" + " status:open"); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
	}
	});

	msgDatecommitterData = new Label(messagesComposite, SWT.NONE);
	GridData gdDateCommitter = new GridData(SWT.RIGHT, SWT.CENTER, false, false, 2, 1);
	msgDatecommitterData.setLayoutData(gdDateCommitter);

	//LINE 3 - Commit: <commitId>
	Label lblCommit = new Label(messagesComposite, SWT.NONE);
	lblCommit.setText(Messages.MessageTabView_6);
	lblCommit.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

	msgCommitidData = new Link(messagesComposite, SWT.NONE);
	msgCommitidData.setToolTipText(Messages.MessageTabView_11);
	msgCommitidData.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	LinkDashboard linkDash = new LinkDashboard(fGerritClient);
	linkDash.invokeRefreshDashboardCommand("", e.text); //$NON-NLS-1$
	}
	});

	msgCommitidData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 3, 1));

	//LINE 4 - Parents: <parentId>
	Label lblParents = new Label(messagesComposite, SWT.NONE);
	lblParents.setText(Messages.MessageTabView_8);
	lblParents.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

	msgParentIdData = new Label(messagesComposite, SWT.NONE);
	msgParentIdData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 3, 1));

	//LINE 5 - ChangeId: <id>
	Label lblChangeid = new Label(messagesComposite, SWT.NONE);
	lblChangeid.setText(Messages.MessageTabView_9);
	lblChangeid.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1));

	msgChangeIdData = new Link(messagesComposite, SWT.NONE);
	msgChangeIdData.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 3, 1));
	msgChangeIdData.setToolTipText(Messages.MessageTabView_12);
	msgChangeIdData.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	LinkDashboard linkDash = new LinkDashboard(fGerritClient);
	linkDash.invokeRefreshDashboardCommand("", e.text); //$NON-NLS-1$
	}
	});
	}

	if (isEditingAllowed()) {
	fBtnSave.addSelectionListener(new SelectionAdapter() {
	/**
	*
	*/
	@Override
	public void widgetSelected(SelectionEvent e) {
	super.widgetSelected(e);
	ChangeCommitMsgCommand editMessageCmd = fGerritClient.editMessage(fChangeInfo.getId());
	ChangeEditMessageInput changeEditMessageInput = new ChangeEditMessageInput();
	changeEditMessageInput.setMessage(msgTextData.getText());
	editMessageCmd.setCommandInput(changeEditMessageInput);
	PublishChangeEditCommand publishChangeEditCmd = fGerritClient
	.publishChangeEdit(fChangeInfo.getId());

	try {
	editMessageCmd.call();
	publishChangeEditCmd.call();
	} catch (EGerritException e3) {
	EGerritCorePlugin
	.logError(fGerritClient.getRepository().formatGerritVersion() + e3.getMessage());
	}
	fBtnSave.setEnabled(false);
	btnCancel.setEnabled(false);
	ModelLoader loader = ModelLoader.initialize(fGerritClient, fChangeInfo);
	loader.loadBasicInformation(false);
	loader.dispose();
	}
	});
	}

	if (fShowExtraInfo) {
	new Label(messagesComposite, SWT.NONE);
	}

	//Set the binding for this section
	msgTabDataBindings();
	}

	private void msgTabDataBindings() {
	bindCommitMessage();
	if (!fShowExtraInfo) {
	observableCollector = new ObservableCollector(bindingContext);
	return;// Do not bind any other functionality when not shown
	}

	bindComitAuthor();
	bindCommitDate();
	bindCommitterName();
	bindCommitterDate();
	bindCommitId();
	bindCommitParents();
	bindChangeId();
	observableCollector = new ObservableCollector(bindingContext);
	}

	/**
	*
	*/
	private void bindChangeId() {
	//Show change id
	IObservableValue<String> msgChangeIdDataValue = EMFObservables.observeValue(fChangeInfo,
	ModelPackage.Literals.CHANGE_INFO__CHANGE_ID);
	bindingContext.bindValue(WidgetProperties.text().observe(msgChangeIdData), msgChangeIdDataValue, null,
	new UpdateValueStrategy().setConverter(DataConverter.linkText()));
	}

	/**
	*
	*/
	private void bindCommitParents() {
	//show commit parents
	FeaturePath commitParents = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__REVISION,
	ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__PARENTS);
	final IObservableList parents = EMFProperties.list(commitParents).observe(fChangeInfo);
	ComputedValue<String> parentCommitsAsString = new ComputedValue<String>() {
	@Override
	protected String calculate() {
	Iterator it = parents.iterator();
	StringBuilder result = new StringBuilder();
	while (it.hasNext()) {
	CommitInfo info = (CommitInfo) it.next();
	result.append(info.getCommit());
	result.append(" "); //$NON-NLS-1$
	}
	return result.toString().trim();
	}
	};
	bindingContext.bindValue(WidgetProperties.text().observe(msgParentIdData), parentCommitsAsString, null, null);
	}

	/**
	*
	*/
	private void bindCommitId() {
	//show commit id
	final FeaturePath commitId = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__REVISION,
	ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__COMMIT);
	IObservableValue<String> msgCommitidDataValue = EMFProperties.value(commitId).observe(fChangeInfo);
	bindingContext.bindValue(WidgetProperties.text().observe(msgCommitidData), msgCommitidDataValue, null,
	new UpdateValueStrategy().setConverter(DataConverter.linkText()));
	}

	/**
	*
	*/
	private void bindCommitterDate() {
	//Show committer date
	final FeaturePath commiterDate = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION,
	ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__COMMITTER,
	ModelPackage.Literals.GIT_PERSON_INFO__DATE);
	IObservableValue<String> msgCommitterDateDataValue = EMFProperties.value(commiterDate).observe(fChangeInfo);
	bindingContext.bindValue(WidgetProperties.text().observe(msgDatecommitterData), msgCommitterDateDataValue, null,
	new UpdateValueStrategy().setConverter(DataConverter.gerritTimeConverter(formatTimeOut)));
	}

	/**
	*
	*/
	private void bindCommitterName() {
	//Show committer name
	final FeaturePath committerName = FeaturePath.fromList(
	ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION, ModelPackage.Literals.REVISION_INFO__COMMIT,
	ModelPackage.Literals.COMMIT_INFO__COMMITTER);
	IObservableValue<String> msgCommitterDataValue = EMFProperties.value(committerName).observe(fChangeInfo);
	bindingContext.bindValue(WidgetProperties.text().observe(msgCommitterData), msgCommitterDataValue, null,
	new UpdateValueStrategy().setConverter(DataConverter.gitPersonConverter()));
	}

	/**
	*
	*/
	private void bindCommitDate() {
	final FeaturePath commitDate = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION,
	ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__AUTHOR,
	ModelPackage.Literals.GIT_PERSON_INFO__DATE);
	IObservableValue<String> msgAuthorDateDataValue = EMFProperties.value(commitDate).observe(fChangeInfo);
	bindingContext.bindValue(WidgetProperties.text().observe(msgDatePushData), msgAuthorDateDataValue, null,
	new UpdateValueStrategy().setConverter(DataConverter.gerritTimeConverter(formatTimeOut)));
	}

	/**
	*
	*/
	private void bindComitAuthor() {
	//show commit author
	final FeaturePath authorName = FeaturePath.fromList(ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION,
	ModelPackage.Literals.REVISION_INFO__COMMIT, ModelPackage.Literals.COMMIT_INFO__AUTHOR);
	IObservableValue<String> msgAuthorDataValue = EMFProperties.value(authorName).observe(fChangeInfo);
	bindingContext.bindValue(WidgetProperties.text().observe(msgAuthorData), msgAuthorDataValue, null,
	new UpdateValueStrategy().setConverter(DataConverter.gitPersonConverter()));
	}

	/**
	*
	*/
	private void bindCommitMessage() {
	//the commit message
	final FeaturePath commitMessage = FeaturePath.fromList(
	ModelPackage.Literals.CHANGE_INFO__USER_SELECTED_REVISION, ModelPackage.Literals.REVISION_INFO__COMMIT,
	ModelPackage.Literals.COMMIT_INFO__MESSAGE);
	IObservableValue<String> msgTextDataValue = EMFProperties.value(commitMessage).observe(fChangeInfo);
	bindingContext.bindValue(WidgetProperties.text().observe(msgTextData), msgTextDataValue, null, null);

	}

	public void dispose() {
	observableCollector.dispose();
	bindingContext.dispose();
	}
	}