org.eclipse.ltk.ui.refactoring/src/org/eclipse/ltk/internal/ui/refactoring/history/RefactoringPropertyPage.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ltk.internal.ui.refactoring.history;

 import java.io.IOException;

 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
 import org.eclipse.core.runtime.preferences.IScopeContext;

 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.ProjectScope;

 import org.eclipse.ltk.core.refactoring.RefactoringCore;
 import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;
 import org.eclipse.ltk.core.refactoring.RefactoringDescriptorProxy;
 import org.eclipse.ltk.core.refactoring.RefactoringStatus;
 import org.eclipse.ltk.core.refactoring.history.IRefactoringHistoryService;

 import org.eclipse.ltk.internal.core.refactoring.RefactoringPreferenceConstants;
 import org.eclipse.ltk.internal.core.refactoring.history.IRefactoringDescriptorDeleteQuery;
 import org.eclipse.ltk.internal.core.refactoring.history.RefactoringHistoryService;
 import org.eclipse.ltk.internal.ui.refactoring.Messages;
 import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIMessages;
 import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIPlugin;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 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.Control;
 import org.eclipse.swt.widgets.Label;

 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.dialogs.InputDialog;
 import org.eclipse.jface.dialogs.MessageDialog;
 import org.eclipse.jface.dialogs.MessageDialogWithToggle;
 import org.eclipse.jface.preference.IPreferencePageContainer;
 import org.eclipse.jface.preference.IPreferenceStore;

 import org.eclipse.ui.dialogs.PropertyPage;
 import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;
 import org.eclipse.ui.preferences.IWorkingCopyManager;

 import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryControlConfiguration;

 import org.osgi.service.prefs.BackingStoreException;

 /**
  * Property page for a project's refactoring history.
  *
  * @since 3.2
  */
 public final class RefactoringPropertyPage extends PropertyPage {

 	/** The refactoring descriptor delete query */
 	private class RefactoringDescriptorDeleteQuery implements IRefactoringDescriptorDeleteQuery {

 		/**
 		 * {@inheritDoc}
 		 */
 		public RefactoringStatus proceed(final RefactoringDescriptorProxy proxy) {
 			Assert.isNotNull(proxy);
 			final IPreferenceStore store= RefactoringUIPlugin.getDefault().getPreferenceStore();
 			MessageDialogWithToggle dialog= null;
 			if (!store.getBoolean(PREFERENCE_DO_NOT_WARN_DELETE)) {
 				final String project= proxy.getProject();
 				dialog= MessageDialogWithToggle.openYesNoQuestion(getShell(), RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_caption, (project == null || "".equals(project)) ? RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_workspace_pattern : RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_project_pattern, RefactoringUIMessages.RefactoringHistoryWizard_do_not_show_message, false, null, null); //$NON-NLS-1$
 				store.setValue(PREFERENCE_DO_NOT_WARN_DELETE, dialog.getToggleState());
 			}
 			if (dialog == null || dialog.getReturnCode() == IDialogConstants.YES_ID)
 				return new RefactoringStatus();
 			return RefactoringStatus.createErrorStatus(IDialogConstants.NO_LABEL);
 		}
 	}

 	/** Preference key for the warn delete preference */
 	private static final String PREFERENCE_DO_NOT_WARN_DELETE= RefactoringUIPlugin.getPluginId() + ".do.not.warn.delete.descriptor"; //$NON-NLS-1$;

 	/** Preference key for the warn delete all preference */
 	private static final String PREFERENCE_DO_NOT_WARN_DELETE_ALL= RefactoringUIPlugin.getPluginId() + ".do.not.warn.delete.history"; //$NON-NLS-1$;

 	/** The refactoring preference */
 	private boolean fHasProjectHistory= false;

 	/** The preferences working copy manager, or <code>null</code> */
 	private IWorkingCopyManager fManager= null;

 	/** The share history button, or <code>null</code> */
 	private Button fShareHistory= null;

 	/**
 	 * {@inheritDoc}
 	 */
 	protected Control createContents(final Composite parent) {
 		initializeDialogUnits(parent);

 		final IPreferencePageContainer container= getContainer();
 		if (container instanceof IWorkbenchPreferenceContainer)
 			fManager= ((IWorkbenchPreferenceContainer) container).getWorkingCopyManager();

 		final Composite composite= new Composite(parent, SWT.NONE);
 		final GridLayout layout= new GridLayout();
 		layout.marginWidth= 0;
 		layout.marginHeight= 0;
 		layout.marginRight= convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
 		composite.setLayout(layout);

 		final Label label= new Label(composite, SWT.WRAP);
 		label.setText(RefactoringUIMessages.RefactoringPropertyPage_label_message);

 		final ManageRefactoringHistoryControl control= new ManageRefactoringHistoryControl(composite, new RefactoringHistoryControlConfiguration(getCurrentProject(), true, true));
 		control.createControl();
 		control.getDeleteAllButton().addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				final IProject project= getCurrentProject();
 				final IPreferenceStore store= RefactoringUIPlugin.getDefault().getPreferenceStore();
 				MessageDialogWithToggle dialog= null;
 				if (!store.getBoolean(PREFERENCE_DO_NOT_WARN_DELETE_ALL) && !control.getInput().isEmpty()) {
 					dialog= MessageDialogWithToggle.openYesNoQuestion(getShell(), RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_all_caption, Messages.format(RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_all_pattern, project.getName()), RefactoringUIMessages.RefactoringHistoryWizard_do_not_show_message, false, null, null);
 					store.setValue(PREFERENCE_DO_NOT_WARN_DELETE_ALL, dialog.getToggleState());
 				}
 				if (dialog == null || dialog.getReturnCode() == IDialogConstants.YES_ID) {
 					RefactoringHistoryService service= RefactoringHistoryService.getInstance();
 					try {
 						service.connect();
 						try {
 							service.deleteRefactoringHistory(project, null);
 						} catch (CoreException exception) {
 							final Throwable throwable= exception.getStatus().getException();
 							if (throwable instanceof IOException)
 								MessageDialog.openError(getShell(), RefactoringUIMessages.ChangeExceptionHandler_refactoring, throwable.getLocalizedMessage());
 							else
 								RefactoringUIPlugin.log(exception);
 						}
 						control.setInput(service.getProjectHistory(project, null));
 					} finally {
 						service.disconnect();
 					}
 				}
 			}
 		});
 		control.getDeleteButton().addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				final RefactoringDescriptorProxy[] selection= control.getCheckedDescriptors();
 				if (selection.length > 0) {
 					RefactoringHistoryService service= RefactoringHistoryService.getInstance();
 					try {
 						service.connect();
 						try {
 							service.deleteRefactoringDescriptors(selection, new RefactoringDescriptorDeleteQuery(), null);
 						} catch (CoreException exception) {
 							final Throwable throwable= exception.getStatus().getException();
 							if (throwable instanceof IOException)
 								MessageDialog.openError(getShell(), RefactoringUIMessages.ChangeExceptionHandler_refactoring, throwable.getLocalizedMessage());
 							else
 								RefactoringUIPlugin.log(exception);
 						}
 						control.setInput(service.getProjectHistory(getCurrentProject(), null));
 					} finally {
 						service.disconnect();
 					}
 				}
 			}
 		});
 		control.getEditButton().addSelectionListener(new SelectionAdapter() {

 			public final void widgetSelected(final SelectionEvent event) {
 				String comment= ""; //$NON-NLS-1$
 				final RefactoringDescriptorProxy[] selection= control.getSelectedDescriptors();
 				if (selection.length > 0) {
 					RefactoringHistoryService service= RefactoringHistoryService.getInstance();
 					try {
 						service.connect();
 						final RefactoringDescriptor descriptor= selection[0].requestDescriptor(null);
 						if (descriptor != null) {
 							final String current= descriptor.getComment();
 							if (current != null)
 								comment= current;
 						}
 						final InputDialog dialog= new InputDialog(getShell(), RefactoringUIMessages.RefactoringPropertyPage_edit_caption, RefactoringUIMessages.RefactoringPropertyPage_edit_message, comment, null);
 						if (dialog.open() == 0) {
 							service.setRefactoringComment(selection[0], dialog.getValue(), null);
 							control.setSelectedDescriptors(new RefactoringDescriptorProxy[0]);
 							control.setSelectedDescriptors(new RefactoringDescriptorProxy[] { selection[0]});
 						}
 					} catch (CoreException exception) {
 						RefactoringUIPlugin.log(exception);
 					} finally {
 						service.disconnect();
 					}
 				}
 			}
 		});
 		fShareHistory= new Button(composite, SWT.CHECK);
 		fShareHistory.setText(RefactoringUIMessages.RefactoringPropertyPage_share_message);
 		fShareHistory.setData(RefactoringPreferenceConstants.PREFERENCE_SHARED_REFACTORING_HISTORY);

 		fShareHistory.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
 		fShareHistory.setSelection(hasSharedRefactoringHistory());

 		new Label(composite, SWT.NONE);

 		final IProject project= getCurrentProject();
 		if (project != null) {
 			final IRefactoringHistoryService service= RefactoringCore.getHistoryService();
 			try {
 				service.connect();
 				control.setInput(service.getProjectHistory(project, null));
 			} finally {
 				service.disconnect();
 			}
 		}
 		applyDialogFont(composite);

 		return composite;
 	}

 	/**
 	 * Returns the project currently associated with this property page.
 	 *
 	 * @return the currently associated project, or <code>null</code>
 	 */
 	private IProject getCurrentProject() {
 		return (IProject) getElement().getAdapter(IProject.class);
 	}

 	/**
 	 * Returns the preferences for the specified context.
 	 *
 	 * @param manager
 	 *            the working copy manager
 	 * @param context
 	 *            the scope context
 	 * @return the preferences
 	 */
 	private IEclipsePreferences getPreferences(final IWorkingCopyManager manager, final IScopeContext context) {
 		final IEclipsePreferences preferences= context.getNode(RefactoringCore.ID_PLUGIN);
 		if (manager != null)
 			return manager.getWorkingCopy(preferences);
 		return preferences;
 	}

 	/**
 	 * Returns whether a project has an shared refactoring history.
 	 *
 	 * @return <code>true</code> if the project contains an shared project
 	 *         history, <code>false</code> otherwise
 	 */
 	private boolean hasSharedRefactoringHistory() {
 		final IProject project= getCurrentProject();
 		if (project != null)
 			return RefactoringHistoryService.getInstance().hasSharedRefactoringHistory(project);
 		return false;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	protected void performDefaults() {
 		super.performDefaults();
 		final IProject project= getCurrentProject();
 		if (project != null)
 			setPreference(fManager, new ProjectScope(project), RefactoringPreferenceConstants.PREFERENCE_SHARED_REFACTORING_HISTORY, null);
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	public boolean performOk() {
 		final IProject project= getCurrentProject();
 		if (project != null)
 			setPreference(fManager, new ProjectScope(project), RefactoringPreferenceConstants.PREFERENCE_SHARED_REFACTORING_HISTORY, Boolean.valueOf(fShareHistory.getSelection()).toString());
 		if (fManager != null)
 			try {
 				fManager.applyChanges();
 				final RefactoringHistoryService service= RefactoringHistoryService.getInstance();
 				final boolean history= service.hasSharedRefactoringHistory(project);
 				if (history != fHasProjectHistory && project != null)
 					service.setSharedRefactoringHistory(project, history, null);
 			} catch (BackingStoreException exception) {
 				RefactoringUIPlugin.log(exception);
 			} catch (CoreException exception) {
 				RefactoringUIPlugin.log(exception);
 			}
 		return super.performOk();
 	}

 	/**
 	 * Sets the preference for a certain context.
 	 *
 	 * @param manager
 	 *            the working copy manager
 	 * @param context
 	 *            the scope context
 	 * @param key
 	 *            the key of the preference
 	 * @param value
 	 *            the value of the preference
 	 */
 	private void setPreference(final IWorkingCopyManager manager, final IScopeContext context, final String key, final String value) {
 		final IEclipsePreferences preferences= getPreferences(manager, context);
 		if (value != null)
 			preferences.put(key, value);
 		else
 			preferences.remove(key);
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	public void setVisible(final boolean visible) {
 		fHasProjectHistory= hasSharedRefactoringHistory();
 		super.setVisible(visible);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2005 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.ltk.internal.ui.refactoring.history;

	import java.io.IOException;

	import org.eclipse.core.runtime.Assert;
	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.preferences.IEclipsePreferences;
	import org.eclipse.core.runtime.preferences.IScopeContext;

	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.ProjectScope;

	import org.eclipse.ltk.core.refactoring.RefactoringCore;
	import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;
	import org.eclipse.ltk.core.refactoring.RefactoringDescriptorProxy;
	import org.eclipse.ltk.core.refactoring.RefactoringStatus;
	import org.eclipse.ltk.core.refactoring.history.IRefactoringHistoryService;

	import org.eclipse.ltk.internal.core.refactoring.RefactoringPreferenceConstants;
	import org.eclipse.ltk.internal.core.refactoring.history.IRefactoringDescriptorDeleteQuery;
	import org.eclipse.ltk.internal.core.refactoring.history.RefactoringHistoryService;
	import org.eclipse.ltk.internal.ui.refactoring.Messages;
	import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIMessages;
	import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIPlugin;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	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.Control;
	import org.eclipse.swt.widgets.Label;

	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.dialogs.InputDialog;
	import org.eclipse.jface.dialogs.MessageDialog;
	import org.eclipse.jface.dialogs.MessageDialogWithToggle;
	import org.eclipse.jface.preference.IPreferencePageContainer;
	import org.eclipse.jface.preference.IPreferenceStore;

	import org.eclipse.ui.dialogs.PropertyPage;
	import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer;
	import org.eclipse.ui.preferences.IWorkingCopyManager;

	import org.eclipse.ltk.ui.refactoring.history.RefactoringHistoryControlConfiguration;

	import org.osgi.service.prefs.BackingStoreException;

	/**
	* Property page for a project's refactoring history.
	*
	* @since 3.2
	*/
	public final class RefactoringPropertyPage extends PropertyPage {

	/** The refactoring descriptor delete query */
	private class RefactoringDescriptorDeleteQuery implements IRefactoringDescriptorDeleteQuery {

	/**
	* {@inheritDoc}
	*/
	public RefactoringStatus proceed(final RefactoringDescriptorProxy proxy) {
	Assert.isNotNull(proxy);
	final IPreferenceStore store= RefactoringUIPlugin.getDefault().getPreferenceStore();
	MessageDialogWithToggle dialog= null;
	if (!store.getBoolean(PREFERENCE_DO_NOT_WARN_DELETE)) {
	final String project= proxy.getProject();
	dialog= MessageDialogWithToggle.openYesNoQuestion(getShell(), RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_caption, (project == null \|\| "".equals(project)) ? RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_workspace_pattern : RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_project_pattern, RefactoringUIMessages.RefactoringHistoryWizard_do_not_show_message, false, null, null); //$NON-NLS-1$
	store.setValue(PREFERENCE_DO_NOT_WARN_DELETE, dialog.getToggleState());
	}
	if (dialog == null \|\| dialog.getReturnCode() == IDialogConstants.YES_ID)
	return new RefactoringStatus();
	return RefactoringStatus.createErrorStatus(IDialogConstants.NO_LABEL);
	}
	}

	/** Preference key for the warn delete preference */
	private static final String PREFERENCE_DO_NOT_WARN_DELETE= RefactoringUIPlugin.getPluginId() + ".do.not.warn.delete.descriptor"; //$NON-NLS-1$;

	/** Preference key for the warn delete all preference */
	private static final String PREFERENCE_DO_NOT_WARN_DELETE_ALL= RefactoringUIPlugin.getPluginId() + ".do.not.warn.delete.history"; //$NON-NLS-1$;

	/** The refactoring preference */
	private boolean fHasProjectHistory= false;

	/** The preferences working copy manager, or <code>null</code> */
	private IWorkingCopyManager fManager= null;

	/** The share history button, or <code>null</code> */
	private Button fShareHistory= null;

	/**
	* {@inheritDoc}
	*/
	protected Control createContents(final Composite parent) {
	initializeDialogUnits(parent);

	final IPreferencePageContainer container= getContainer();
	if (container instanceof IWorkbenchPreferenceContainer)
	fManager= ((IWorkbenchPreferenceContainer) container).getWorkingCopyManager();

	final Composite composite= new Composite(parent, SWT.NONE);
	final GridLayout layout= new GridLayout();
	layout.marginWidth= 0;
	layout.marginHeight= 0;
	layout.marginRight= convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	composite.setLayout(layout);

	final Label label= new Label(composite, SWT.WRAP);
	label.setText(RefactoringUIMessages.RefactoringPropertyPage_label_message);

	final ManageRefactoringHistoryControl control= new ManageRefactoringHistoryControl(composite, new RefactoringHistoryControlConfiguration(getCurrentProject(), true, true));
	control.createControl();
	control.getDeleteAllButton().addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	final IProject project= getCurrentProject();
	final IPreferenceStore store= RefactoringUIPlugin.getDefault().getPreferenceStore();
	MessageDialogWithToggle dialog= null;
	if (!store.getBoolean(PREFERENCE_DO_NOT_WARN_DELETE_ALL) && !control.getInput().isEmpty()) {
	dialog= MessageDialogWithToggle.openYesNoQuestion(getShell(), RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_all_caption, Messages.format(RefactoringUIMessages.RefactoringPropertyPage_confirm_delete_all_pattern, project.getName()), RefactoringUIMessages.RefactoringHistoryWizard_do_not_show_message, false, null, null);
	store.setValue(PREFERENCE_DO_NOT_WARN_DELETE_ALL, dialog.getToggleState());
	}
	if (dialog == null \|\| dialog.getReturnCode() == IDialogConstants.YES_ID) {
	RefactoringHistoryService service= RefactoringHistoryService.getInstance();
	try {
	service.connect();
	try {
	service.deleteRefactoringHistory(project, null);
	} catch (CoreException exception) {
	final Throwable throwable= exception.getStatus().getException();
	if (throwable instanceof IOException)
	MessageDialog.openError(getShell(), RefactoringUIMessages.ChangeExceptionHandler_refactoring, throwable.getLocalizedMessage());
	else
	RefactoringUIPlugin.log(exception);
	}
	control.setInput(service.getProjectHistory(project, null));
	} finally {
	service.disconnect();
	}
	}
	}
	});
	control.getDeleteButton().addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	final RefactoringDescriptorProxy[] selection= control.getCheckedDescriptors();
	if (selection.length > 0) {
	RefactoringHistoryService service= RefactoringHistoryService.getInstance();
	try {
	service.connect();
	try {
	service.deleteRefactoringDescriptors(selection, new RefactoringDescriptorDeleteQuery(), null);
	} catch (CoreException exception) {
	final Throwable throwable= exception.getStatus().getException();
	if (throwable instanceof IOException)
	MessageDialog.openError(getShell(), RefactoringUIMessages.ChangeExceptionHandler_refactoring, throwable.getLocalizedMessage());
	else
	RefactoringUIPlugin.log(exception);
	}
	control.setInput(service.getProjectHistory(getCurrentProject(), null));
	} finally {
	service.disconnect();
	}
	}
	}
	});
	control.getEditButton().addSelectionListener(new SelectionAdapter() {

	public final void widgetSelected(final SelectionEvent event) {
	String comment= ""; //$NON-NLS-1$
	final RefactoringDescriptorProxy[] selection= control.getSelectedDescriptors();
	if (selection.length > 0) {
	RefactoringHistoryService service= RefactoringHistoryService.getInstance();
	try {
	service.connect();
	final RefactoringDescriptor descriptor= selection[0].requestDescriptor(null);
	if (descriptor != null) {
	final String current= descriptor.getComment();
	if (current != null)
	comment= current;
	}
	final InputDialog dialog= new InputDialog(getShell(), RefactoringUIMessages.RefactoringPropertyPage_edit_caption, RefactoringUIMessages.RefactoringPropertyPage_edit_message, comment, null);
	if (dialog.open() == 0) {
	service.setRefactoringComment(selection[0], dialog.getValue(), null);
	control.setSelectedDescriptors(new RefactoringDescriptorProxy[0]);
	control.setSelectedDescriptors(new RefactoringDescriptorProxy[] { selection[0]});
	}
	} catch (CoreException exception) {
	RefactoringUIPlugin.log(exception);
	} finally {
	service.disconnect();
	}
	}
	}
	});
	fShareHistory= new Button(composite, SWT.CHECK);
	fShareHistory.setText(RefactoringUIMessages.RefactoringPropertyPage_share_message);
	fShareHistory.setData(RefactoringPreferenceConstants.PREFERENCE_SHARED_REFACTORING_HISTORY);

	fShareHistory.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
	fShareHistory.setSelection(hasSharedRefactoringHistory());

	new Label(composite, SWT.NONE);

	final IProject project= getCurrentProject();
	if (project != null) {
	final IRefactoringHistoryService service= RefactoringCore.getHistoryService();
	try {
	service.connect();
	control.setInput(service.getProjectHistory(project, null));
	} finally {
	service.disconnect();
	}
	}
	applyDialogFont(composite);

	return composite;
	}

	/**
	* Returns the project currently associated with this property page.
	*
	* @return the currently associated project, or <code>null</code>
	*/
	private IProject getCurrentProject() {
	return (IProject) getElement().getAdapter(IProject.class);
	}

	/**
	* Returns the preferences for the specified context.
	*
	* @param manager
	* the working copy manager
	* @param context
	* the scope context
	* @return the preferences
	*/
	private IEclipsePreferences getPreferences(final IWorkingCopyManager manager, final IScopeContext context) {
	final IEclipsePreferences preferences= context.getNode(RefactoringCore.ID_PLUGIN);
	if (manager != null)
	return manager.getWorkingCopy(preferences);
	return preferences;
	}

	/**
	* Returns whether a project has an shared refactoring history.
	*
	* @return <code>true</code> if the project contains an shared project
	* history, <code>false</code> otherwise
	*/
	private boolean hasSharedRefactoringHistory() {
	final IProject project= getCurrentProject();
	if (project != null)
	return RefactoringHistoryService.getInstance().hasSharedRefactoringHistory(project);
	return false;
	}

	/**
	* {@inheritDoc}
	*/
	protected void performDefaults() {
	super.performDefaults();
	final IProject project= getCurrentProject();
	if (project != null)
	setPreference(fManager, new ProjectScope(project), RefactoringPreferenceConstants.PREFERENCE_SHARED_REFACTORING_HISTORY, null);
	}

	/**
	* {@inheritDoc}
	*/
	public boolean performOk() {
	final IProject project= getCurrentProject();
	if (project != null)
	setPreference(fManager, new ProjectScope(project), RefactoringPreferenceConstants.PREFERENCE_SHARED_REFACTORING_HISTORY, Boolean.valueOf(fShareHistory.getSelection()).toString());
	if (fManager != null)
	try {
	fManager.applyChanges();
	final RefactoringHistoryService service= RefactoringHistoryService.getInstance();
	final boolean history= service.hasSharedRefactoringHistory(project);
	if (history != fHasProjectHistory && project != null)
	service.setSharedRefactoringHistory(project, history, null);
	} catch (BackingStoreException exception) {
	RefactoringUIPlugin.log(exception);
	} catch (CoreException exception) {
	RefactoringUIPlugin.log(exception);
	}
	return super.performOk();
	}

	/**
	* Sets the preference for a certain context.
	*
	* @param manager
	* the working copy manager
	* @param context
	* the scope context
	* @param key
	* the key of the preference
	* @param value
	* the value of the preference
	*/
	private void setPreference(final IWorkingCopyManager manager, final IScopeContext context, final String key, final String value) {
	final IEclipsePreferences preferences= getPreferences(manager, context);
	if (value != null)
	preferences.put(key, value);
	else
	preferences.remove(key);
	}

	/**
	* {@inheritDoc}
	*/
	public void setVisible(final boolean visible) {
	fHasProjectHistory= hasSharedRefactoringHistory();
	super.setVisible(visible);
	}
	}