org.eclipse.jdt.ui/ui refactoring/org/eclipse/jdt/internal/ui/refactoring/ExtractClassWizard.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2007, 2014 IBM Corporation and others.
  *
  * 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:
  *     IBM Corporation - initial API and implementation
  *     Lars Vogel <Lars.Vogel@gmail.com> - Bug 427883
  *******************************************************************************/
 package org.eclipse.jdt.internal.ui.refactoring;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.SelectionAdapter;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.graphics.Image;
 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.Table;
 import org.eclipse.swt.widgets.TableColumn;
 import org.eclipse.swt.widgets.Text;

 import org.eclipse.core.runtime.IStatus;

 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.dialogs.IMessageProvider;
 import org.eclipse.jface.dialogs.InputDialog;
 import org.eclipse.jface.fieldassist.ControlDecoration;
 import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
 import org.eclipse.jface.viewers.ArrayContentProvider;
 import org.eclipse.jface.viewers.CellEditor;
 import org.eclipse.jface.viewers.CellLabelProvider;
 import org.eclipse.jface.viewers.CheckboxTableViewer;
 import org.eclipse.jface.viewers.ColumnViewer;
 import org.eclipse.jface.viewers.ColumnWeightData;
 import org.eclipse.jface.viewers.EditingSupport;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.TableViewerColumn;
 import org.eclipse.jface.viewers.TextCellEditor;
 import org.eclipse.jface.viewers.ViewerCell;
 import org.eclipse.jface.window.Window;

 import org.eclipse.ltk.core.refactoring.Refactoring;
 import org.eclipse.ltk.core.refactoring.RefactoringStatus;
 import org.eclipse.ltk.core.refactoring.RefactoringStatusEntry;
 import org.eclipse.ltk.ui.refactoring.RefactoringWizard;
 import org.eclipse.ltk.ui.refactoring.UserInputWizardPage;

 import org.eclipse.jdt.core.IField;
 import org.eclipse.jdt.core.JavaModelException;
 import org.eclipse.jdt.core.Signature;
 import org.eclipse.jdt.core.refactoring.descriptors.ExtractClassDescriptor;
 import org.eclipse.jdt.core.refactoring.descriptors.ExtractClassDescriptor.Field;

 import org.eclipse.jdt.internal.corext.refactoring.structure.ExtractClassRefactoring.ExtractClassDescriptorVerification;
 import org.eclipse.jdt.internal.corext.util.JavaConventionsUtil;
 import org.eclipse.jdt.internal.corext.util.Messages;

 import org.eclipse.jdt.ui.JavaElementLabels;

 import org.eclipse.jdt.internal.ui.util.SWTUtil;
 import org.eclipse.jdt.internal.ui.util.TableLayoutComposite;

 public class ExtractClassWizard extends RefactoringWizard {

 	private ExtractClassDescriptor fDescriptor;

 	public ExtractClassWizard(ExtractClassDescriptor descriptor, Refactoring refactoring) {
 		super(refactoring, DIALOG_BASED_USER_INTERFACE);
 		fDescriptor= descriptor;
 		setDefaultPageTitle(RefactoringMessages.ExtractClassWizard_page_title);
 	}

 	@Override
 	protected void addUserInputPages() {
 		addPage(new ExtractClassUserInputWizardPage());
 	}

 	private class ExtractClassUserInputWizardPage extends UserInputWizardPage {

 		private static final String CREATE_GETTER_SETTER= "CREATE_GETTER_SETTER"; //$NON-NLS-1$
 		private static final String CREATE_TOP_LEVEL_SETTING= "CREATE_TOPLEVEL"; //$NON-NLS-1$
 		private ControlDecoration fClassNameDecoration;
 		private ControlDecoration fParameterNameDecoration;

 		public ExtractClassUserInputWizardPage() {
 			super("ExtractClass"); //$NON-NLS-1$
 			setTitle(RefactoringMessages.ExtractClassWizard_page_title);
 		}

 		@Override
 		public void createControl(Composite parent) {
 			initializeDialogUnits(parent);
 			Composite result= new Composite(parent, SWT.NONE);
 			result.setLayout(new GridLayout(2, false));
 			createClassNameInput(result);
 			createLocationInput(result);
 			createTable(result);
 			createGetterSetterInput(result);
 			createParameterNameInput(result);
 			setControl(result);
 			validateRefactoring();
 		}

 		private void createLocationInput(Composite parent) {
 			Label l= new Label(parent, SWT.NONE);
 			l.setText(RefactoringMessages.ExtractClassWizard_label_destination);

 			Composite composite= new Composite(parent, SWT.None);
 			GridLayout gridLayout= new GridLayout(2, false);
 			gridLayout.marginHeight= 0;
 			gridLayout.marginWidth= 0;
 			composite.setLayout(gridLayout);

 			GridData gridData= new GridData(GridData.FILL_HORIZONTAL);
 			gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
 			composite.setLayoutData(gridData);

 			final Button topLvlRadio= new Button(composite, SWT.RADIO);
 			topLvlRadio.setText(RefactoringMessages.ExtractClassWizard_radio_top_level);
 			topLvlRadio.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					boolean fAsTopLevel= topLvlRadio.getSelection();
 					fDescriptor.setCreateTopLevel(fAsTopLevel);
 					validateRefactoring();
 				}
 			});

 			Button nestedRadio= new Button(composite, SWT.RADIO);
 			nestedRadio.setText(Messages.format(RefactoringMessages.ExtractClassWizard_radio_nested, JavaElementLabels.getElementLabel(fDescriptor.getType(), JavaElementLabels.ALL_DEFAULT)));

 			boolean createAsTopLevel= getBooleanSetting(CREATE_TOP_LEVEL_SETTING, fDescriptor.isCreateTopLevel());
 			fDescriptor.setCreateTopLevel(createAsTopLevel);
 			topLvlRadio.setSelection(createAsTopLevel);
 			nestedRadio.setSelection(!createAsTopLevel);

 		}

 		private void createGetterSetterInput(Composite result) {
 			final Button button= new Button(result, SWT.CHECK);
 			button.setText(RefactoringMessages.ExtractClassWizard_checkbox_create_gettersetter);
 			button.addSelectionListener(new SelectionAdapter() {

 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					fDescriptor.setCreateGetterSetter(button.getSelection());
 					validateRefactoring();
 				}

 			});
 			button.setSelection(getBooleanSetting(CREATE_GETTER_SETTER, fDescriptor.isCreateGetterSetter()));
 			fDescriptor.setCreateGetterSetter(button.getSelection());
 			GridData gridData= new GridData();
 			gridData.horizontalSpan= 2;
 			button.setLayoutData(gridData);
 		}

 		private void createClassNameInput(Composite result) {
 			Label label= new Label(result, SWT.LEAD);
 			label.setText(RefactoringMessages.ExtractClassWizard_label_class_name);
 			final Text text= new Text(result, SWT.SINGLE | SWT.BORDER);
 			fClassNameDecoration= new ControlDecoration(text, SWT.TOP | SWT.LEAD);
 			text.setText(fDescriptor.getClassName());
 			text.selectAll();
 			text.setFocus();
 			text.addModifyListener(e -> {
 				fDescriptor.setClassName(text.getText());
 				validateRefactoring();
 			});
 			GridData gridData= new GridData(GridData.FILL_HORIZONTAL);
 			gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
 			text.setLayoutData(gridData);
 		}


 		protected void updateDecoration(ControlDecoration decoration, RefactoringStatus status) {
 			RefactoringStatusEntry highestSeverity= status.getEntryWithHighestSeverity();
 			if (highestSeverity != null) {
 				Image newImage= null;
 				FieldDecorationRegistry registry= FieldDecorationRegistry.getDefault();
 				switch (highestSeverity.getSeverity()) {
 					case RefactoringStatus.INFO:
 						newImage= registry.getFieldDecoration(FieldDecorationRegistry.DEC_INFORMATION).getImage();
 						break;
 					case RefactoringStatus.WARNING:
 						newImage= registry.getFieldDecoration(FieldDecorationRegistry.DEC_WARNING).getImage();
 						break;
 					case RefactoringStatus.FATAL:
 					case RefactoringStatus.ERROR:
 						newImage= registry.getFieldDecoration(FieldDecorationRegistry.DEC_ERROR).getImage();
 				}
 				decoration.setDescriptionText(highestSeverity.getMessage());
 				decoration.setImage(newImage);
 				decoration.show();
 			} else {
 				decoration.setDescriptionText(null);
 				decoration.hide();
 			}
 		}

 		private void createParameterNameInput(Composite group) {
 			Label l= new Label(group, SWT.NONE);
 			l.setText(RefactoringMessages.ExtractClassWizard_field_name);

 			final Text text= new Text(group, SWT.BORDER);
 			fParameterNameDecoration= new ControlDecoration(text, SWT.TOP | SWT.LEAD);
 			text.setText(fDescriptor.getFieldName());
 			text.addModifyListener(e -> {
 				fDescriptor.setFieldName(text.getText());
 				validateRefactoring();
 			});
 			GridData gridData= new GridData(GridData.FILL_HORIZONTAL);
 			gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
 			text.setLayoutData(gridData);
 		}

 		private void createTable(Composite parent) {
 			Composite result= new Composite(parent, SWT.NONE);
 			GridLayout layout= new GridLayout(2, false);
 			layout.marginHeight= 0;
 			layout.marginWidth= 0;
 			result.setLayout(layout);
 			GridData gridData= new GridData(GridData.FILL_BOTH);
 			gridData.horizontalSpan= 2;
 			result.setLayoutData(gridData);

 			Label l= new Label(result, SWT.NONE);
 			l.setText(RefactoringMessages.ExtractClassWizard_label_select_fields);
 			gridData= new GridData(GridData.FILL_HORIZONTAL);
 			gridData.horizontalSpan= 2;
 			gridData.verticalIndent= 5;
 			//gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
 			l.setLayoutData(gridData);
 			//fFieldDecoration= new ControlDecoration(l, SWT.TOP | SWT.LEAD);

 			TableLayoutComposite layoutComposite= new TableLayoutComposite(result, SWT.NONE);
 			layoutComposite.addColumnData(new ColumnWeightData(40, convertWidthInCharsToPixels(20), true));
 			layoutComposite.addColumnData(new ColumnWeightData(60, convertWidthInCharsToPixels(20), true));
 			final CheckboxTableViewer tv= CheckboxTableViewer.newCheckList(layoutComposite, SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER | SWT.FULL_SELECTION | SWT.MULTI);
 			tv.setContentProvider(ArrayContentProvider.getInstance());
 			createColumns(tv);

 			Table table= tv.getTable();
 			table.setLinesVisible(true);
 			table.setHeaderVisible(true);
 			gridData= new GridData(GridData.FILL_BOTH);
 			table.setLayoutData(gridData);
 			Field[] fields= fDescriptor.getFields();
 			tv.setInput(fields);
 			for (Field field : fields) {
 				tv.setChecked(field, field.isCreateField());
 			}

 			gridData= new GridData(GridData.FILL_BOTH);
 			gridData.heightHint= SWTUtil.getTableHeightHint(table, Math.max(fields.length,5));
 			gridData.widthHint= convertWidthInCharsToPixels(50);
 			layoutComposite.setLayoutData(gridData);
 			Composite controls= new Composite(result, SWT.NONE);
 			gridData= new GridData(GridData.FILL, GridData.FILL, false, false);
 			controls.setLayoutData(gridData);
 			GridLayout gridLayout= new GridLayout();
 			gridLayout.marginHeight= 0;
 			gridLayout.marginWidth= 0;
 			controls.setLayout(gridLayout);

 			final Button editButton= new Button(controls, SWT.NONE);
 			editButton.setText(RefactoringMessages.ExtractClassWizard_button_edit);
 			editButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 			editButton.setEnabled(!tv.getSelection().isEmpty());
 			SWTUtil.setButtonDimensionHint(editButton);
 			editButton.addSelectionListener(new SelectionAdapter() {
 				@Override
 				public void widgetSelected(SelectionEvent e) {
 					ISelection selection= tv.getSelection();
 					if (selection instanceof IStructuredSelection) {
 						IStructuredSelection ss= (IStructuredSelection) selection;
 						Field selected= (Field) ss.getFirstElement();
 						String message= RefactoringMessages.ExtractClassWizard_dialog_message;
 						String title= RefactoringMessages.ExtractClassWizard_dialog_title;
 						InputDialog inputDialog= new InputDialog(getShell(), title, message, selected.getNewFieldName(), newText -> {
 							IStatus status= JavaConventionsUtil.validateIdentifier(newText, fDescriptor.getType());
 							if (!status.isOK())
 								return status.getMessage();
 							return null;
 						});
 						if (inputDialog.open() == Window.OK) {
 							selected.setNewFieldName(inputDialog.getValue());
 							tv.refresh(selected);
 						}

 					}
 				}
 			});
 			tv.addCheckStateListener(event -> {
 				Field element= (Field) event.getElement();
 				element.setCreateField(event.getChecked());
 				validateRefactoring();
 				tv.refresh(element, true);
 			});
 			tv.addSelectionChangedListener(event -> {
 				IStructuredSelection selection= (IStructuredSelection) tv.getSelection();
 				Field field= (Field) selection.getFirstElement();
 				if (selection.isEmpty()) {
 					editButton.setEnabled(false);
 				} else {
 					editButton.setEnabled(tv.getChecked(field));
 				}
 			});
 		}

 		private abstract class FieldInfoLabelProvider extends CellLabelProvider {
 			@Override
 			public void update(ViewerCell cell) {
 				Field pi= (Field) cell.getElement();
 				cell.setText(doGetValue(pi));
 			}

 			protected abstract String doGetValue(Field pi);
 		}

 		private abstract class FieldInfoEditingSupport extends EditingSupport {
 			private CellEditor fTextEditor;

 			private FieldInfoEditingSupport(CellEditor textEditor, ColumnViewer tv) {
 				super(tv);
 				fTextEditor= textEditor;
 			}

 			@Override
 			protected void setValue(Object element, Object value) {
 				if (element instanceof Field) {
 					Field pi= (Field) element;
 					doSetValue(pi, value.toString());
 					getViewer().update(element, null);
 				}
 				validateRefactoring();
 			}

 			public abstract void doSetValue(Field pi, String string);

 			@Override
 			protected Object getValue(Object element) {
 				if (element instanceof Field) {
 					Field pi= (Field) element;
 					return doGetValue(pi);
 				}
 				return null;
 			}

 			public abstract String doGetValue(Field pi);

 			@Override
 			protected CellEditor getCellEditor(Object element) {
 				return fTextEditor;
 			}

 			@Override
 			protected boolean canEdit(Object element) {
 				if (element instanceof Field) {
 					return fTextEditor != null;
 				}
 				return false;
 			}
 		}

 		private void createColumns(final CheckboxTableViewer tv) {
 			TextCellEditor cellEditor= new TextCellEditor(tv.getTable());

 			TableViewerColumn viewerColumn= new TableViewerColumn(tv, SWT.LEAD);
 			viewerColumn.setLabelProvider(new FieldInfoLabelProvider() {
 				@Override
 				protected String doGetValue(Field pi) {
 					IField field= fDescriptor.getType().getField(pi.getFieldName());
 					try {
 						return Signature.toString(field.getTypeSignature());
 					} catch (JavaModelException e) {
 						return RefactoringMessages.ExtractClassWizard_not_available;
 					}
 				}
 			});

 			TableColumn column= viewerColumn.getColumn();
 			column.setText(RefactoringMessages.ExtractClassWizard_column_type);
 			viewerColumn= new TableViewerColumn(tv, SWT.LEAD);
 			viewerColumn.setLabelProvider(new FieldInfoLabelProvider() {
 				@Override
 				protected String doGetValue(Field pi) {
 					if (pi.isCreateField())
 						return pi.getNewFieldName();
 					else
 						return pi.getFieldName();
 				}
 			});
 			viewerColumn.setEditingSupport(new FieldInfoEditingSupport(cellEditor, tv) {
 				@Override
 				public String doGetValue(Field pi) {
 					return pi.getNewFieldName();
 				}

 				@Override
 				public void doSetValue(Field pi, String string) {
 					pi.setNewFieldName(string);
 				}

 				@Override
 				protected boolean canEdit(Object element) {
 					if (element instanceof Field) {
 						Field field= (Field) element;
 						return field.isCreateField();
 					}
 					return super.canEdit(element);
 				}
 			});
 			column= viewerColumn.getColumn();
 			column.setText(RefactoringMessages.ExtractClassWizard_column_name);
 		}

 		protected RefactoringStatus validateParameterName() {
 			RefactoringStatus status= new RefactoringStatus();
 			ExtractClassDescriptorVerification verification= getVerification();
 			status.merge(verification.validateParameterName());
 			updateDecoration(fParameterNameDecoration, status);
 			return status;
 		}

 		protected RefactoringStatus validateTopLevel() {
 			RefactoringStatus status= new RefactoringStatus();
 			ExtractClassDescriptorVerification verification= getVerification();
 			status.merge(verification.validateTopLevel());
 			updateDecoration(fClassNameDecoration, status);
 			return status;
 		}

 		protected RefactoringStatus validateClassName() {
 			RefactoringStatus status= new RefactoringStatus();
 			ExtractClassDescriptorVerification verification= getVerification();
 			status.merge(verification.validateClassName());
 			updateDecoration(fClassNameDecoration, status);
 			return status;
 		}

 		protected RefactoringStatus validateFields() {
 			RefactoringStatus status= new RefactoringStatus();
 			ExtractClassDescriptorVerification verification= getVerification();
 			status.merge(verification.validateFields());
 			return status;
 		}

 		protected RefactoringStatus validateRefactoring() {
 			RefactoringStatus status= new RefactoringStatus();
 			setErrorMessage(null);
 			setMessage(null);
 			setPageComplete(true);
 			status.merge(validateTopLevel());
 			status.merge(validateClassName());
 			status.merge(validateParameterName());
 			status.merge(validateFields());
 			RefactoringStatusEntry highestSeverity= status.getEntryWithHighestSeverity();
 			if (highestSeverity != null) {
 				switch (highestSeverity.getSeverity()) {
 					case RefactoringStatus.ERROR:
 					case RefactoringStatus.FATAL:
 						setErrorMessage(highestSeverity.getMessage());
 						setPageComplete(false);
 						break;
 					case RefactoringStatus.WARNING:
 						setMessage(highestSeverity.getMessage(), IMessageProvider.WARNING);
 						break;
 					case RefactoringStatus.INFO:
 						setMessage(highestSeverity.getMessage(), IMessageProvider.INFORMATION);
 						break;
 				}
 			}
 			return status;
 		}

 		protected boolean getBooleanSetting(String key, boolean defaultValue) {
 			String update= getRefactoringSettings().get(key);
 			if (update != null)
 				return Boolean.parseBoolean(update);
 			else
 				return defaultValue;
 		}

 		@Override
 		public void dispose() {
 			IDialogSettings settings= getRefactoringSettings();
 			settings.put(CREATE_GETTER_SETTER, fDescriptor.isCreateGetterSetter());
 			settings.put(CREATE_TOP_LEVEL_SETTING, fDescriptor.isCreateTopLevel());
 			super.dispose();
 		}

 	}

 	public ExtractClassDescriptorVerification getVerification() {
 		ExtractClassDescriptorVerification adapter= getRefactoring().getAdapter(ExtractClassDescriptorVerification.class);
 		return adapter;
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2007, 2014 IBM Corporation and others.
	*
	* 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:
	* IBM Corporation - initial API and implementation
	* Lars Vogel <Lars.Vogel@gmail.com> - Bug 427883
	*******************************************************************************/
	package org.eclipse.jdt.internal.ui.refactoring;

	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.SelectionAdapter;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.graphics.Image;
	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.Table;
	import org.eclipse.swt.widgets.TableColumn;
	import org.eclipse.swt.widgets.Text;

	import org.eclipse.core.runtime.IStatus;

	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.dialogs.IMessageProvider;
	import org.eclipse.jface.dialogs.InputDialog;
	import org.eclipse.jface.fieldassist.ControlDecoration;
	import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
	import org.eclipse.jface.viewers.ArrayContentProvider;
	import org.eclipse.jface.viewers.CellEditor;
	import org.eclipse.jface.viewers.CellLabelProvider;
	import org.eclipse.jface.viewers.CheckboxTableViewer;
	import org.eclipse.jface.viewers.ColumnViewer;
	import org.eclipse.jface.viewers.ColumnWeightData;
	import org.eclipse.jface.viewers.EditingSupport;
	import org.eclipse.jface.viewers.ISelection;
	import org.eclipse.jface.viewers.IStructuredSelection;
	import org.eclipse.jface.viewers.TableViewerColumn;
	import org.eclipse.jface.viewers.TextCellEditor;
	import org.eclipse.jface.viewers.ViewerCell;
	import org.eclipse.jface.window.Window;

	import org.eclipse.ltk.core.refactoring.Refactoring;
	import org.eclipse.ltk.core.refactoring.RefactoringStatus;
	import org.eclipse.ltk.core.refactoring.RefactoringStatusEntry;
	import org.eclipse.ltk.ui.refactoring.RefactoringWizard;
	import org.eclipse.ltk.ui.refactoring.UserInputWizardPage;

	import org.eclipse.jdt.core.IField;
	import org.eclipse.jdt.core.JavaModelException;
	import org.eclipse.jdt.core.Signature;
	import org.eclipse.jdt.core.refactoring.descriptors.ExtractClassDescriptor;
	import org.eclipse.jdt.core.refactoring.descriptors.ExtractClassDescriptor.Field;

	import org.eclipse.jdt.internal.corext.refactoring.structure.ExtractClassRefactoring.ExtractClassDescriptorVerification;
	import org.eclipse.jdt.internal.corext.util.JavaConventionsUtil;
	import org.eclipse.jdt.internal.corext.util.Messages;

	import org.eclipse.jdt.ui.JavaElementLabels;

	import org.eclipse.jdt.internal.ui.util.SWTUtil;
	import org.eclipse.jdt.internal.ui.util.TableLayoutComposite;

	public class ExtractClassWizard extends RefactoringWizard {

	private ExtractClassDescriptor fDescriptor;

	public ExtractClassWizard(ExtractClassDescriptor descriptor, Refactoring refactoring) {
	super(refactoring, DIALOG_BASED_USER_INTERFACE);
	fDescriptor= descriptor;
	setDefaultPageTitle(RefactoringMessages.ExtractClassWizard_page_title);
	}

	@Override
	protected void addUserInputPages() {
	addPage(new ExtractClassUserInputWizardPage());
	}

	private class ExtractClassUserInputWizardPage extends UserInputWizardPage {

	private static final String CREATE_GETTER_SETTER= "CREATE_GETTER_SETTER"; //$NON-NLS-1$
	private static final String CREATE_TOP_LEVEL_SETTING= "CREATE_TOPLEVEL"; //$NON-NLS-1$
	private ControlDecoration fClassNameDecoration;
	private ControlDecoration fParameterNameDecoration;

	public ExtractClassUserInputWizardPage() {
	super("ExtractClass"); //$NON-NLS-1$
	setTitle(RefactoringMessages.ExtractClassWizard_page_title);
	}

	@Override
	public void createControl(Composite parent) {
	initializeDialogUnits(parent);
	Composite result= new Composite(parent, SWT.NONE);
	result.setLayout(new GridLayout(2, false));
	createClassNameInput(result);
	createLocationInput(result);
	createTable(result);
	createGetterSetterInput(result);
	createParameterNameInput(result);
	setControl(result);
	validateRefactoring();
	}

	private void createLocationInput(Composite parent) {
	Label l= new Label(parent, SWT.NONE);
	l.setText(RefactoringMessages.ExtractClassWizard_label_destination);

	Composite composite= new Composite(parent, SWT.None);
	GridLayout gridLayout= new GridLayout(2, false);
	gridLayout.marginHeight= 0;
	gridLayout.marginWidth= 0;
	composite.setLayout(gridLayout);

	GridData gridData= new GridData(GridData.FILL_HORIZONTAL);
	gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
	composite.setLayoutData(gridData);

	final Button topLvlRadio= new Button(composite, SWT.RADIO);
	topLvlRadio.setText(RefactoringMessages.ExtractClassWizard_radio_top_level);
	topLvlRadio.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	boolean fAsTopLevel= topLvlRadio.getSelection();
	fDescriptor.setCreateTopLevel(fAsTopLevel);
	validateRefactoring();
	}
	});

	Button nestedRadio= new Button(composite, SWT.RADIO);
	nestedRadio.setText(Messages.format(RefactoringMessages.ExtractClassWizard_radio_nested, JavaElementLabels.getElementLabel(fDescriptor.getType(), JavaElementLabels.ALL_DEFAULT)));

	boolean createAsTopLevel= getBooleanSetting(CREATE_TOP_LEVEL_SETTING, fDescriptor.isCreateTopLevel());
	fDescriptor.setCreateTopLevel(createAsTopLevel);
	topLvlRadio.setSelection(createAsTopLevel);
	nestedRadio.setSelection(!createAsTopLevel);

	}

	private void createGetterSetterInput(Composite result) {
	final Button button= new Button(result, SWT.CHECK);
	button.setText(RefactoringMessages.ExtractClassWizard_checkbox_create_gettersetter);
	button.addSelectionListener(new SelectionAdapter() {

	@Override
	public void widgetSelected(SelectionEvent e) {
	fDescriptor.setCreateGetterSetter(button.getSelection());
	validateRefactoring();
	}

	});
	button.setSelection(getBooleanSetting(CREATE_GETTER_SETTER, fDescriptor.isCreateGetterSetter()));
	fDescriptor.setCreateGetterSetter(button.getSelection());
	GridData gridData= new GridData();
	gridData.horizontalSpan= 2;
	button.setLayoutData(gridData);
	}

	private void createClassNameInput(Composite result) {
	Label label= new Label(result, SWT.LEAD);
	label.setText(RefactoringMessages.ExtractClassWizard_label_class_name);
	final Text text= new Text(result, SWT.SINGLE \| SWT.BORDER);
	fClassNameDecoration= new ControlDecoration(text, SWT.TOP \| SWT.LEAD);
	text.setText(fDescriptor.getClassName());
	text.selectAll();
	text.setFocus();
	text.addModifyListener(e -> {
	fDescriptor.setClassName(text.getText());
	validateRefactoring();
	});
	GridData gridData= new GridData(GridData.FILL_HORIZONTAL);
	gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
	text.setLayoutData(gridData);
	}


	protected void updateDecoration(ControlDecoration decoration, RefactoringStatus status) {
	RefactoringStatusEntry highestSeverity= status.getEntryWithHighestSeverity();
	if (highestSeverity != null) {
	Image newImage= null;
	FieldDecorationRegistry registry= FieldDecorationRegistry.getDefault();
	switch (highestSeverity.getSeverity()) {
	case RefactoringStatus.INFO:
	newImage= registry.getFieldDecoration(FieldDecorationRegistry.DEC_INFORMATION).getImage();
	break;
	case RefactoringStatus.WARNING:
	newImage= registry.getFieldDecoration(FieldDecorationRegistry.DEC_WARNING).getImage();
	break;
	case RefactoringStatus.FATAL:
	case RefactoringStatus.ERROR:
	newImage= registry.getFieldDecoration(FieldDecorationRegistry.DEC_ERROR).getImage();
	}
	decoration.setDescriptionText(highestSeverity.getMessage());
	decoration.setImage(newImage);
	decoration.show();
	} else {
	decoration.setDescriptionText(null);
	decoration.hide();
	}
	}

	private void createParameterNameInput(Composite group) {
	Label l= new Label(group, SWT.NONE);
	l.setText(RefactoringMessages.ExtractClassWizard_field_name);

	final Text text= new Text(group, SWT.BORDER);
	fParameterNameDecoration= new ControlDecoration(text, SWT.TOP \| SWT.LEAD);
	text.setText(fDescriptor.getFieldName());
	text.addModifyListener(e -> {
	fDescriptor.setFieldName(text.getText());
	validateRefactoring();
	});
	GridData gridData= new GridData(GridData.FILL_HORIZONTAL);
	gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
	text.setLayoutData(gridData);
	}

	private void createTable(Composite parent) {
	Composite result= new Composite(parent, SWT.NONE);
	GridLayout layout= new GridLayout(2, false);
	layout.marginHeight= 0;
	layout.marginWidth= 0;
	result.setLayout(layout);
	GridData gridData= new GridData(GridData.FILL_BOTH);
	gridData.horizontalSpan= 2;
	result.setLayoutData(gridData);

	Label l= new Label(result, SWT.NONE);
	l.setText(RefactoringMessages.ExtractClassWizard_label_select_fields);
	gridData= new GridData(GridData.FILL_HORIZONTAL);
	gridData.horizontalSpan= 2;
	gridData.verticalIndent= 5;
	//gridData.horizontalIndent= FieldDecorationRegistry.getDefault().getMaximumDecorationWidth();
	l.setLayoutData(gridData);
	//fFieldDecoration= new ControlDecoration(l, SWT.TOP \| SWT.LEAD);

	TableLayoutComposite layoutComposite= new TableLayoutComposite(result, SWT.NONE);
	layoutComposite.addColumnData(new ColumnWeightData(40, convertWidthInCharsToPixels(20), true));
	layoutComposite.addColumnData(new ColumnWeightData(60, convertWidthInCharsToPixels(20), true));
	final CheckboxTableViewer tv= CheckboxTableViewer.newCheckList(layoutComposite, SWT.V_SCROLL \| SWT.H_SCROLL \| SWT.BORDER \| SWT.FULL_SELECTION \| SWT.MULTI);
	tv.setContentProvider(ArrayContentProvider.getInstance());
	createColumns(tv);

	Table table= tv.getTable();
	table.setLinesVisible(true);
	table.setHeaderVisible(true);
	gridData= new GridData(GridData.FILL_BOTH);
	table.setLayoutData(gridData);
	Field[] fields= fDescriptor.getFields();
	tv.setInput(fields);
	for (Field field : fields) {
	tv.setChecked(field, field.isCreateField());
	}

	gridData= new GridData(GridData.FILL_BOTH);
	gridData.heightHint= SWTUtil.getTableHeightHint(table, Math.max(fields.length,5));
	gridData.widthHint= convertWidthInCharsToPixels(50);
	layoutComposite.setLayoutData(gridData);
	Composite controls= new Composite(result, SWT.NONE);
	gridData= new GridData(GridData.FILL, GridData.FILL, false, false);
	controls.setLayoutData(gridData);
	GridLayout gridLayout= new GridLayout();
	gridLayout.marginHeight= 0;
	gridLayout.marginWidth= 0;
	controls.setLayout(gridLayout);

	final Button editButton= new Button(controls, SWT.NONE);
	editButton.setText(RefactoringMessages.ExtractClassWizard_button_edit);
	editButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	editButton.setEnabled(!tv.getSelection().isEmpty());
	SWTUtil.setButtonDimensionHint(editButton);
	editButton.addSelectionListener(new SelectionAdapter() {
	@Override
	public void widgetSelected(SelectionEvent e) {
	ISelection selection= tv.getSelection();
	if (selection instanceof IStructuredSelection) {
	IStructuredSelection ss= (IStructuredSelection) selection;
	Field selected= (Field) ss.getFirstElement();
	String message= RefactoringMessages.ExtractClassWizard_dialog_message;
	String title= RefactoringMessages.ExtractClassWizard_dialog_title;
	InputDialog inputDialog= new InputDialog(getShell(), title, message, selected.getNewFieldName(), newText -> {
	IStatus status= JavaConventionsUtil.validateIdentifier(newText, fDescriptor.getType());
	if (!status.isOK())
	return status.getMessage();
	return null;
	});
	if (inputDialog.open() == Window.OK) {
	selected.setNewFieldName(inputDialog.getValue());
	tv.refresh(selected);
	}

	}
	}
	});
	tv.addCheckStateListener(event -> {
	Field element= (Field) event.getElement();
	element.setCreateField(event.getChecked());
	validateRefactoring();
	tv.refresh(element, true);
	});
	tv.addSelectionChangedListener(event -> {
	IStructuredSelection selection= (IStructuredSelection) tv.getSelection();
	Field field= (Field) selection.getFirstElement();
	if (selection.isEmpty()) {
	editButton.setEnabled(false);
	} else {
	editButton.setEnabled(tv.getChecked(field));
	}
	});
	}

	private abstract class FieldInfoLabelProvider extends CellLabelProvider {
	@Override
	public void update(ViewerCell cell) {
	Field pi= (Field) cell.getElement();
	cell.setText(doGetValue(pi));
	}

	protected abstract String doGetValue(Field pi);
	}

	private abstract class FieldInfoEditingSupport extends EditingSupport {
	private CellEditor fTextEditor;

	private FieldInfoEditingSupport(CellEditor textEditor, ColumnViewer tv) {
	super(tv);
	fTextEditor= textEditor;
	}

	@Override
	protected void setValue(Object element, Object value) {
	if (element instanceof Field) {
	Field pi= (Field) element;
	doSetValue(pi, value.toString());
	getViewer().update(element, null);
	}
	validateRefactoring();
	}

	public abstract void doSetValue(Field pi, String string);

	@Override
	protected Object getValue(Object element) {
	if (element instanceof Field) {
	Field pi= (Field) element;
	return doGetValue(pi);
	}
	return null;
	}

	public abstract String doGetValue(Field pi);

	@Override
	protected CellEditor getCellEditor(Object element) {
	return fTextEditor;
	}

	@Override
	protected boolean canEdit(Object element) {
	if (element instanceof Field) {
	return fTextEditor != null;
	}
	return false;
	}
	}

	private void createColumns(final CheckboxTableViewer tv) {
	TextCellEditor cellEditor= new TextCellEditor(tv.getTable());

	TableViewerColumn viewerColumn= new TableViewerColumn(tv, SWT.LEAD);
	viewerColumn.setLabelProvider(new FieldInfoLabelProvider() {
	@Override
	protected String doGetValue(Field pi) {
	IField field= fDescriptor.getType().getField(pi.getFieldName());
	try {
	return Signature.toString(field.getTypeSignature());
	} catch (JavaModelException e) {
	return RefactoringMessages.ExtractClassWizard_not_available;
	}
	}
	});

	TableColumn column= viewerColumn.getColumn();
	column.setText(RefactoringMessages.ExtractClassWizard_column_type);
	viewerColumn= new TableViewerColumn(tv, SWT.LEAD);
	viewerColumn.setLabelProvider(new FieldInfoLabelProvider() {
	@Override
	protected String doGetValue(Field pi) {
	if (pi.isCreateField())
	return pi.getNewFieldName();
	else
	return pi.getFieldName();
	}
	});
	viewerColumn.setEditingSupport(new FieldInfoEditingSupport(cellEditor, tv) {
	@Override
	public String doGetValue(Field pi) {
	return pi.getNewFieldName();
	}

	@Override
	public void doSetValue(Field pi, String string) {
	pi.setNewFieldName(string);
	}

	@Override
	protected boolean canEdit(Object element) {
	if (element instanceof Field) {
	Field field= (Field) element;
	return field.isCreateField();
	}
	return super.canEdit(element);
	}
	});
	column= viewerColumn.getColumn();
	column.setText(RefactoringMessages.ExtractClassWizard_column_name);
	}

	protected RefactoringStatus validateParameterName() {
	RefactoringStatus status= new RefactoringStatus();
	ExtractClassDescriptorVerification verification= getVerification();
	status.merge(verification.validateParameterName());
	updateDecoration(fParameterNameDecoration, status);
	return status;
	}

	protected RefactoringStatus validateTopLevel() {
	RefactoringStatus status= new RefactoringStatus();
	ExtractClassDescriptorVerification verification= getVerification();
	status.merge(verification.validateTopLevel());
	updateDecoration(fClassNameDecoration, status);
	return status;
	}

	protected RefactoringStatus validateClassName() {
	RefactoringStatus status= new RefactoringStatus();
	ExtractClassDescriptorVerification verification= getVerification();
	status.merge(verification.validateClassName());
	updateDecoration(fClassNameDecoration, status);
	return status;
	}

	protected RefactoringStatus validateFields() {
	RefactoringStatus status= new RefactoringStatus();
	ExtractClassDescriptorVerification verification= getVerification();
	status.merge(verification.validateFields());
	return status;
	}

	protected RefactoringStatus validateRefactoring() {
	RefactoringStatus status= new RefactoringStatus();
	setErrorMessage(null);
	setMessage(null);
	setPageComplete(true);
	status.merge(validateTopLevel());
	status.merge(validateClassName());
	status.merge(validateParameterName());
	status.merge(validateFields());
	RefactoringStatusEntry highestSeverity= status.getEntryWithHighestSeverity();
	if (highestSeverity != null) {
	switch (highestSeverity.getSeverity()) {
	case RefactoringStatus.ERROR:
	case RefactoringStatus.FATAL:
	setErrorMessage(highestSeverity.getMessage());
	setPageComplete(false);
	break;
	case RefactoringStatus.WARNING:
	setMessage(highestSeverity.getMessage(), IMessageProvider.WARNING);
	break;
	case RefactoringStatus.INFO:
	setMessage(highestSeverity.getMessage(), IMessageProvider.INFORMATION);
	break;
	}
	}
	return status;
	}

	protected boolean getBooleanSetting(String key, boolean defaultValue) {
	String update= getRefactoringSettings().get(key);
	if (update != null)
	return Boolean.parseBoolean(update);
	else
	return defaultValue;
	}

	@Override
	public void dispose() {
	IDialogSettings settings= getRefactoringSettings();
	settings.put(CREATE_GETTER_SETTER, fDescriptor.isCreateGetterSetter());
	settings.put(CREATE_TOP_LEVEL_SETTING, fDescriptor.isCreateTopLevel());
	super.dispose();
	}

	}

	public ExtractClassDescriptorVerification getVerification() {
	ExtractClassDescriptorVerification adapter= getRefactoring().getAdapter(ExtractClassDescriptorVerification.class);
	return adapter;
	}

	}