plugins/org.eclipse.dltk.javascript.ui/src/org/eclipse/dltk/javascript/internal/ui/refactoring/code/ExtractMethodInputPage.java - dltk/org.eclipse.dltk.javascript - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2009 IBM Corporation and others.
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0 which is available at
  * http://www.eclipse.org/legal/epl-2.0.
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Benjamin Muskalla <bmuskalla@eclipsesource.com> - [extract method] remember selected access modifier - https://bugs.eclipse.org/bugs/show_bug.cgi?id=101233
  *******************************************************************************/
 package org.eclipse.dltk.javascript.internal.ui.refactoring.code;

 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.dltk.internal.javascript.corext.refactoring.ParameterInfo;
 import org.eclipse.dltk.internal.javascript.corext.refactoring.code.ExtractMethodRefactoring;
 import org.eclipse.dltk.internal.ui.dialogs.TextFieldNavigationHandler;
 import org.eclipse.dltk.internal.ui.editor.ScriptSourceViewer;
 import org.eclipse.dltk.internal.ui.refactoring.RefactoringMessages;
 import org.eclipse.dltk.internal.ui.util.RowLayouter;
 import org.eclipse.dltk.javascript.core.JavaScriptNature;
 import org.eclipse.dltk.javascript.internal.ui.refactoring.ChangeParametersControl;
 import org.eclipse.dltk.javascript.internal.ui.refactoring.IParameterListChangeListener;
 import org.eclipse.dltk.javascript.internal.ui.text.JavascriptSourceViewerConfiguration;
 import org.eclipse.dltk.ui.DLTKPluginImages;
 import org.eclipse.dltk.ui.DLTKUILanguageManager;
 import org.eclipse.dltk.ui.IDLTKUILanguageToolkit;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.layout.PixelConverter;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.text.Document;
 import org.eclipse.ltk.core.refactoring.RefactoringStatus;
 import org.eclipse.ltk.ui.refactoring.UserInputWizardPage;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.ModifyEvent;
 import org.eclipse.swt.events.ModifyListener;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Text;

 public class ExtractMethodInputPage extends UserInputWizardPage {

 	public static final String PAGE_NAME = "ExtractMethodInputPage";//$NON-NLS-1$

 	private ExtractMethodRefactoring fRefactoring;
 	private Text fTextField;
 	private boolean fFirstTime;
 	private ScriptSourceViewer fSignaturePreview;
 	private Document fSignaturePreviewDocument;
 	private IDialogSettings fSettings;

 	private static final String DESCRIPTION = RefactoringMessages.ExtractMethodInputPage_description;
 	private static final String THROW_RUNTIME_EXCEPTIONS = "ThrowRuntimeExceptions"; //$NON-NLS-1$
 	private static final String GENERATE_JAVADOC = "GenerateJavadoc"; //$NON-NLS-1$
 	private static final String ACCESS_MODIFIER = "AccessModifier"; //$NON-NLS-1$

 	public ExtractMethodInputPage() {
 		super(PAGE_NAME);
 		setImageDescriptor(DLTKPluginImages.DESC_WIZBAN_REFACTOR_CU);
 		setDescription(DESCRIPTION);
 		fFirstTime = true;
 		fSignaturePreviewDocument = new Document();
 	}

 	public void createControl(Composite parent) {
 		fRefactoring = (ExtractMethodRefactoring) getRefactoring();
 		loadSettings();

 		Composite result = new Composite(parent, SWT.NONE);
 		setControl(result);
 		GridLayout layout = new GridLayout();
 		layout.numColumns = 2;
 		result.setLayout(layout);
 		RowLayouter layouter = new RowLayouter(2);
 		GridData gd = null;

 		initializeDialogUnits(result);

 		Label label = new Label(result, SWT.NONE);
 		label.setText(getLabelText());

 		fTextField = createTextInputField(result, SWT.BORDER);
 		fTextField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		layouter.perform(label, fTextField, 1);

 		/*
 		 * Node[] destinations = fRefactoring.getDestinations(); if
 		 * (destinations.length > 1) { label = new Label(result, SWT.NONE);
 		 * label
 		 * .setText(RefactoringMessages.ExtractMethodInputPage_destination_type
 		 * ); final Combo combo = new Combo(result, SWT.READ_ONLY |
 		 * SWT.DROP_DOWN); SWTUtil.setDefaultVisibleItemCount(combo); for (int i
 		 * = 0; i < destinations.length; i++) { Node declaration =
 		 * destinations[i]; combo.add(getLabel(declaration)); } combo.select(0);
 		 * combo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		 * combo.addSelectionListener(new SelectionAdapter() { public void
 		 * widgetSelected(SelectionEvent e) {
 		 * fRefactoring.setDestination(combo.getSelectionIndex());
 		 * updatePreview(getText()); } }); }
 		 */

 		// label = new Label(result, SWT.NONE);
 		// label.setText(RefactoringMessages.ExtractMethodInputPage_access_Modifiers);

 		Composite group = new Composite(result, SWT.NONE);
 		group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		layout = new GridLayout();
 		layout.numColumns = 4;
 		layout.marginWidth = 0;
 		group.setLayout(layout);

 		/*
 		 * String[] labels = new String[] {
 		 * RefactoringMessages.ExtractMethodInputPage_public,
 		 * RefactoringMessages.ExtractMethodInputPage_protected,
 		 * RefactoringMessages.ExtractMethodInputPage_default,
 		 * RefactoringMessages.ExtractMethodInputPage_private }; Integer[] data
 		 * = new Integer[] { new Integer(Modifier.PUBLIC), new
 		 * Integer(Modifier.PROTECTED), new Integer(Modifier.NONE), new
 		 * Integer(Modifier.PRIVATE) }; Integer visibility = new
 		 * Integer(fRefactoring.getVisibility()); for (int i = 0; i <
 		 * labels.length; i++) { Button radio = new Button(group, SWT.RADIO);
 		 * radio.setText(labels[i]); radio.setData(data[i]); if
 		 * (data[i].equals(visibility)) radio.setSelection(true);
 		 * radio.addSelectionListener(new SelectionAdapter() { public void
 		 * widgetSelected(SelectionEvent event) { final Integer selectedModifier
 		 * = (Integer) event.widget .getData(); fSettings.put(ACCESS_MODIFIER,
 		 * selectedModifier.intValue()); setVisibility(selectedModifier); } });
 		 * }
 		 */
 		layouter.perform(label, group, 1);

 		if (!fRefactoring.getParameterInfos().isEmpty()) {
 			ChangeParametersControl cp = new ChangeParametersControl(result,
 					SWT.NONE,
 					RefactoringMessages.ExtractMethodInputPage_parameters,
 					new IParameterListChangeListener() {
 						public void parameterChanged(ParameterInfo parameter) {
 							parameterModified();
 						}

 						public void parameterListChanged() {
 							parameterModified();
 						}

 						public void parameterAdded(ParameterInfo parameter) {
 							updatePreview(getText());
 						}
 					}, ChangeParametersControl.Mode.EXTRACT_METHOD);
 			gd = new GridData(GridData.FILL_BOTH);
 			gd.horizontalSpan = 2;
 			cp.setLayoutData(gd);
 			cp.setInput(fRefactoring.getParameterInfos());
 		}

 		/*
 		 * Button checkBox = new Button(result, SWT.CHECK);
 		 * checkBox.setText(RefactoringMessages
 		 * .ExtractMethodInputPage_throwRuntimeExceptions);
 		 * checkBox.setSelection
 		 * (fSettings.getBoolean(THROW_RUNTIME_EXCEPTIONS));
 		 * checkBox.addSelectionListener(new SelectionAdapter() { public void
 		 * widgetSelected(SelectionEvent e) {
 		 * setRethrowRuntimeException(((Button) e.widget).getSelection()); } });
 		 * layouter.perform(checkBox);
 		 *
 		 * checkBox = new Button(result, SWT.CHECK);
 		 * checkBox.setText(RefactoringMessages
 		 * .ExtractMethodInputPage_generateJavadocComment); boolean generate =
 		 * computeGenerateJavadoc(); setGenerateJavadoc(generate);
 		 * checkBox.setSelection(generate); checkBox.addSelectionListener(new
 		 * SelectionAdapter() { public void widgetSelected(SelectionEvent e) {
 		 * setGenerateJavadoc(((Button) e.widget).getSelection()); } });
 		 * layouter.perform(checkBox);
 		 *
 		 * int duplicates = fRefactoring.getNumberOfDuplicates(); checkBox = new
 		 * Button(result, SWT.CHECK); if (duplicates == 0) {
 		 * checkBox.setText(RefactoringMessages
 		 * .ExtractMethodInputPage_duplicates_none); } else if (duplicates == 1)
 		 * { checkBox.setText(RefactoringMessages.
 		 * ExtractMethodInputPage_duplicates_single); } else {
 		 * checkBox.setText(Messages
 		 * .format(RefactoringMessages.ExtractMethodInputPage_duplicates_multi,
 		 * new Integer(duplicates))); }
 		 * checkBox.setSelection(fRefactoring.getReplaceDuplicates());
 		 * checkBox.setEnabled(duplicates > 0);
 		 * checkBox.addSelectionListener(new SelectionAdapter() { public void
 		 * widgetSelected(SelectionEvent e) {
 		 * fRefactoring.setReplaceDuplicates(((Button) e.widget)
 		 * .getSelection()); } }); layouter.perform(checkBox);
 		 */

 		label = new Label(result, SWT.SEPARATOR | SWT.HORIZONTAL);
 		label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
 		layouter.perform(label);

 		createSignaturePreview(result, layouter);

 		Dialog.applyDialogFont(result);
 		/*
 		 * PlatformUI .getWorkbench() .getHelpSystem() .setHelp(getControl(),
 		 * IJavaHelpContextIds.EXTRACT_METHOD_WIZARD_PAGE);
 		 */
 	}

 	/*
 	 * private String getLabel(ASTNode node) { if (node instanceof
 	 * AbstractTypeDeclaration) { return ((AbstractTypeDeclaration)
 	 * node).getName().getIdentifier(); } else if (node instanceof
 	 * AnonymousClassDeclaration) { if (node.getLocationInParent() ==
 	 * ClassInstanceCreation.ANONYMOUS_CLASS_DECLARATION_PROPERTY) {
 	 * ClassInstanceCreation creation = (ClassInstanceCreation) node
 	 * .getParent(); return Messages
 	 * .format(RefactoringMessages.ExtractMethodInputPage_anonymous_type_label,
 	 * BasicElementLabels.getJavaElementName(ASTNodes
 	 * .asString(creation.getType()))); } else if (node.getLocationInParent() ==
 	 * EnumConstantDeclaration.ANONYMOUS_CLASS_DECLARATION_PROPERTY) {
 	 * EnumConstantDeclaration decl = (EnumConstantDeclaration) node
 	 * .getParent(); return decl.getName().getIdentifier(); } } return
 	 * "UNKNOWN"; //$NON-NLS-1$ }
 	 */

 	private Text createTextInputField(Composite parent, int style) {
 		Text result = new Text(parent, style);
 		result.addModifyListener(new ModifyListener() {
 			public void modifyText(ModifyEvent e) {
 				textModified(getText());
 			}
 		});
 		TextFieldNavigationHandler.install(result);
 		return result;
 	}

 	private String getText() {
 		if (fTextField == null)
 			return null;
 		return fTextField.getText();
 	}

 	private String getLabelText() {
 		return RefactoringMessages.ExtractMethodInputPage_label_text;
 	}

 	/*
 	 * private void setVisibility(Integer visibility) {
 	 * fRefactoring.setVisibility(visibility.intValue());
 	 * updatePreview(getText()); }
 	 *
 	 * private void setRethrowRuntimeException(boolean value) {
 	 * fSettings.put(THROW_RUNTIME_EXCEPTIONS, value);
 	 * fRefactoring.setThrowRuntimeExceptions(value); updatePreview(getText());
 	 * }
 	 *
 	 * private boolean computeGenerateJavadoc() { boolean result =
 	 * fRefactoring.getGenerateJavadoc(); if (result) return result; return
 	 * fSettings.getBoolean(GENERATE_JAVADOC); }
 	 *
 	 * private void setGenerateJavadoc(boolean value) {
 	 * fSettings.put(GENERATE_JAVADOC, value);
 	 * fRefactoring.setGenerateJavadoc(value); }
 	 */

 	private void createSignaturePreview(Composite composite,
 			RowLayouter layouter) {
 		Label previewLabel = new Label(composite, SWT.NONE);
 		previewLabel
 				.setText(RefactoringMessages.ExtractMethodInputPage_signature_preview);
 		layouter.perform(previewLabel);

 		IDLTKUILanguageToolkit toolkit = DLTKUILanguageManager
 				.getLanguageToolkit(JavaScriptNature.NATURE_ID);
 		IPreferenceStore store = toolkit.getCombinedPreferenceStore();
 		fSignaturePreview = new ScriptSourceViewer(composite, null, null,
 				false,
 				SWT.READ_ONLY | SWT.V_SCROLL | SWT.WRAP /* | SWT.BORDER */,
 				store);
 		fSignaturePreview.configure(new JavascriptSourceViewerConfiguration(
 				toolkit.getTextTools().getColorManager(), store, null, null));
 		// fSignaturePreview.getTextWidget().setFont(
 		// JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT));
 		fSignaturePreview.getTextWidget().setBackground(
 				composite.getBackground());
 		fSignaturePreview.setDocument(fSignaturePreviewDocument);
 		fSignaturePreview.setEditable(false);

 		// Layouting problems with wrapped text: see
 		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=9866
 		Control signaturePreviewControl = fSignaturePreview.getControl();
 		PixelConverter pixelConverter = new PixelConverter(
 				signaturePreviewControl);
 		GridData gdata = new GridData(GridData.FILL_BOTH);
 		gdata.widthHint = pixelConverter.convertWidthInCharsToPixels(50);
 		gdata.heightHint = pixelConverter.convertHeightInCharsToPixels(2);
 		signaturePreviewControl.setLayoutData(gdata);
 		layouter.perform(signaturePreviewControl);
 	}

 	private void updatePreview(String text) {
 		if (fSignaturePreview == null)
 			return;

 		if (text.length() == 0)
 			text = "someMethodName"; //$NON-NLS-1$

 		int top = fSignaturePreview.getTextWidget().getTopPixel();
 		String signature;
 		try {
 			signature = fRefactoring.getSignature(text);
 		} catch (IllegalArgumentException e) {
 			signature = ""; //$NON-NLS-1$
 		}
 		fSignaturePreviewDocument.set(signature);
 		fSignaturePreview.getTextWidget().setTopPixel(top);
 	}

 	private void loadSettings() {
 		fSettings = getDialogSettings().getSection(
 				ExtractMethodWizard.DIALOG_SETTING_SECTION);
 		if (fSettings == null) {
 			fSettings = getDialogSettings().addNewSection(
 					ExtractMethodWizard.DIALOG_SETTING_SECTION);
 			/*
 			 * fSettings.put(THROW_RUNTIME_EXCEPTIONS, false); fSettings
 			 * .put(GENERATE_JAVADOC, JavaPreferencesSettings
 			 * .getCodeGenerationSettings(fRefactoring .getCompilationUnit()
 			 * .getJavaProject()).createComments);
 			 * fSettings.put(ACCESS_MODIFIER, Modifier.PRIVATE);
 			 */
 		}
 		/*
 		 * fRefactoring.setThrowRuntimeExceptions(fSettings
 		 * .getBoolean(THROW_RUNTIME_EXCEPTIONS)); final String accessModifier =
 		 * fSettings.get(ACCESS_MODIFIER); if (accessModifier != null) {
 		 * fRefactoring.setVisibility(Integer.parseInt(accessModifier)); }
 		 */
 	}

 	// ---- Input validation
 	// ------------------------------------------------------

 	@Override
 	public void setVisible(boolean visible) {
 		if (visible) {
 			if (fFirstTime) {
 				fFirstTime = false;
 				setPageComplete(false);
 				updatePreview(getText());
 				fTextField.setFocus();
 			} else {
 				setPageComplete(validatePage(true));
 			}
 		}
 		super.setVisible(visible);
 	}

 	private void textModified(String text) {
 		fRefactoring.setMethodName(text);
 		RefactoringStatus status = validatePage(true);
 		if (!status.hasFatalError()) {
 			updatePreview(text);
 		} else {
 			fSignaturePreviewDocument.set(""); //$NON-NLS-1$
 		}
 		setPageComplete(status);
 	}

 	private void parameterModified() {
 		updatePreview(getText());
 		setPageComplete(validatePage(false));
 	}

 	private RefactoringStatus validatePage(boolean text) {
 		RefactoringStatus result = new RefactoringStatus();
 		if (text) {
 			result.merge(validateMethodName());
 			result.merge(validateParameters());
 		} else {
 			result.merge(validateParameters());
 			result.merge(validateMethodName());
 		}
 		return result;
 	}

 	private RefactoringStatus validateMethodName() {
 		RefactoringStatus result = new RefactoringStatus();
 		String text = getText();
 		if ("".equals(text)) { //$NON-NLS-1$
 			result.addFatalError(RefactoringMessages.ExtractMethodInputPage_validation_emptyMethodName);
 			return result;
 		}
 		result.merge(fRefactoring.checkMethodName());
 		return result;
 	}

 	private RefactoringStatus validateParameters() {
 		RefactoringStatus result = new RefactoringStatus();
 		List parameters = fRefactoring.getParameterInfos();
 		for (Iterator iter = parameters.iterator(); iter.hasNext();) {
 			ParameterInfo info = (ParameterInfo) iter.next();
 			if ("".equals(info.getNewName())) { //$NON-NLS-1$
 				result.addFatalError(RefactoringMessages.ExtractMethodInputPage_validation_emptyParameterName);
 				return result;
 			}
 		}
 		result.merge(fRefactoring.checkParameterNames());
 		// result.merge(fRefactoring.checkVarargOrder());
 		return result;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2009 IBM Corporation and others.
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Public License v. 2.0 which is available at
	* http://www.eclipse.org/legal/epl-2.0.
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	* Benjamin Muskalla <bmuskalla@eclipsesource.com> - [extract method] remember selected access modifier - https://bugs.eclipse.org/bugs/show_bug.cgi?id=101233
	*******************************************************************************/
	package org.eclipse.dltk.javascript.internal.ui.refactoring.code;

	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.dltk.internal.javascript.corext.refactoring.ParameterInfo;
	import org.eclipse.dltk.internal.javascript.corext.refactoring.code.ExtractMethodRefactoring;
	import org.eclipse.dltk.internal.ui.dialogs.TextFieldNavigationHandler;
	import org.eclipse.dltk.internal.ui.editor.ScriptSourceViewer;
	import org.eclipse.dltk.internal.ui.refactoring.RefactoringMessages;
	import org.eclipse.dltk.internal.ui.util.RowLayouter;
	import org.eclipse.dltk.javascript.core.JavaScriptNature;
	import org.eclipse.dltk.javascript.internal.ui.refactoring.ChangeParametersControl;
	import org.eclipse.dltk.javascript.internal.ui.refactoring.IParameterListChangeListener;
	import org.eclipse.dltk.javascript.internal.ui.text.JavascriptSourceViewerConfiguration;
	import org.eclipse.dltk.ui.DLTKPluginImages;
	import org.eclipse.dltk.ui.DLTKUILanguageManager;
	import org.eclipse.dltk.ui.IDLTKUILanguageToolkit;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.layout.PixelConverter;
	import org.eclipse.jface.preference.IPreferenceStore;
	import org.eclipse.jface.text.Document;
	import org.eclipse.ltk.core.refactoring.RefactoringStatus;
	import org.eclipse.ltk.ui.refactoring.UserInputWizardPage;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.ModifyEvent;
	import org.eclipse.swt.events.ModifyListener;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Text;

	public class ExtractMethodInputPage extends UserInputWizardPage {

	public static final String PAGE_NAME = "ExtractMethodInputPage";//$NON-NLS-1$

	private ExtractMethodRefactoring fRefactoring;
	private Text fTextField;
	private boolean fFirstTime;
	private ScriptSourceViewer fSignaturePreview;
	private Document fSignaturePreviewDocument;
	private IDialogSettings fSettings;

	private static final String DESCRIPTION = RefactoringMessages.ExtractMethodInputPage_description;
	private static final String THROW_RUNTIME_EXCEPTIONS = "ThrowRuntimeExceptions"; //$NON-NLS-1$
	private static final String GENERATE_JAVADOC = "GenerateJavadoc"; //$NON-NLS-1$
	private static final String ACCESS_MODIFIER = "AccessModifier"; //$NON-NLS-1$

	public ExtractMethodInputPage() {
	super(PAGE_NAME);
	setImageDescriptor(DLTKPluginImages.DESC_WIZBAN_REFACTOR_CU);
	setDescription(DESCRIPTION);
	fFirstTime = true;
	fSignaturePreviewDocument = new Document();
	}

	public void createControl(Composite parent) {
	fRefactoring = (ExtractMethodRefactoring) getRefactoring();
	loadSettings();

	Composite result = new Composite(parent, SWT.NONE);
	setControl(result);
	GridLayout layout = new GridLayout();
	layout.numColumns = 2;
	result.setLayout(layout);
	RowLayouter layouter = new RowLayouter(2);
	GridData gd = null;

	initializeDialogUnits(result);

	Label label = new Label(result, SWT.NONE);
	label.setText(getLabelText());

	fTextField = createTextInputField(result, SWT.BORDER);
	fTextField.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	layouter.perform(label, fTextField, 1);

	/*
	* Node[] destinations = fRefactoring.getDestinations(); if
	* (destinations.length > 1) { label = new Label(result, SWT.NONE);
	* label
	* .setText(RefactoringMessages.ExtractMethodInputPage_destination_type
	* ); final Combo combo = new Combo(result, SWT.READ_ONLY \|
	* SWT.DROP_DOWN); SWTUtil.setDefaultVisibleItemCount(combo); for (int i
	* = 0; i < destinations.length; i++) { Node declaration =
	* destinations[i]; combo.add(getLabel(declaration)); } combo.select(0);
	* combo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	* combo.addSelectionListener(new SelectionAdapter() { public void
	* widgetSelected(SelectionEvent e) {
	* fRefactoring.setDestination(combo.getSelectionIndex());
	* updatePreview(getText()); } }); }
	*/

	// label = new Label(result, SWT.NONE);
	// label.setText(RefactoringMessages.ExtractMethodInputPage_access_Modifiers);

	Composite group = new Composite(result, SWT.NONE);
	group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	layout = new GridLayout();
	layout.numColumns = 4;
	layout.marginWidth = 0;
	group.setLayout(layout);

	/*
	* String[] labels = new String[] {
	* RefactoringMessages.ExtractMethodInputPage_public,
	* RefactoringMessages.ExtractMethodInputPage_protected,
	* RefactoringMessages.ExtractMethodInputPage_default,
	* RefactoringMessages.ExtractMethodInputPage_private }; Integer[] data
	* = new Integer[] { new Integer(Modifier.PUBLIC), new
	* Integer(Modifier.PROTECTED), new Integer(Modifier.NONE), new
	* Integer(Modifier.PRIVATE) }; Integer visibility = new
	* Integer(fRefactoring.getVisibility()); for (int i = 0; i <
	* labels.length; i++) { Button radio = new Button(group, SWT.RADIO);
	* radio.setText(labels[i]); radio.setData(data[i]); if
	* (data[i].equals(visibility)) radio.setSelection(true);
	* radio.addSelectionListener(new SelectionAdapter() { public void
	* widgetSelected(SelectionEvent event) { final Integer selectedModifier
	* = (Integer) event.widget .getData(); fSettings.put(ACCESS_MODIFIER,
	* selectedModifier.intValue()); setVisibility(selectedModifier); } });
	* }
	*/
	layouter.perform(label, group, 1);

	if (!fRefactoring.getParameterInfos().isEmpty()) {
	ChangeParametersControl cp = new ChangeParametersControl(result,
	SWT.NONE,
	RefactoringMessages.ExtractMethodInputPage_parameters,
	new IParameterListChangeListener() {
	public void parameterChanged(ParameterInfo parameter) {
	parameterModified();
	}

	public void parameterListChanged() {
	parameterModified();
	}

	public void parameterAdded(ParameterInfo parameter) {
	updatePreview(getText());
	}
	}, ChangeParametersControl.Mode.EXTRACT_METHOD);
	gd = new GridData(GridData.FILL_BOTH);
	gd.horizontalSpan = 2;
	cp.setLayoutData(gd);
	cp.setInput(fRefactoring.getParameterInfos());
	}

	/*
	* Button checkBox = new Button(result, SWT.CHECK);
	* checkBox.setText(RefactoringMessages
	* .ExtractMethodInputPage_throwRuntimeExceptions);
	* checkBox.setSelection
	* (fSettings.getBoolean(THROW_RUNTIME_EXCEPTIONS));
	* checkBox.addSelectionListener(new SelectionAdapter() { public void
	* widgetSelected(SelectionEvent e) {
	* setRethrowRuntimeException(((Button) e.widget).getSelection()); } });
	* layouter.perform(checkBox);
	*
	* checkBox = new Button(result, SWT.CHECK);
	* checkBox.setText(RefactoringMessages
	* .ExtractMethodInputPage_generateJavadocComment); boolean generate =
	* computeGenerateJavadoc(); setGenerateJavadoc(generate);
	* checkBox.setSelection(generate); checkBox.addSelectionListener(new
	* SelectionAdapter() { public void widgetSelected(SelectionEvent e) {
	* setGenerateJavadoc(((Button) e.widget).getSelection()); } });
	* layouter.perform(checkBox);
	*
	* int duplicates = fRefactoring.getNumberOfDuplicates(); checkBox = new
	* Button(result, SWT.CHECK); if (duplicates == 0) {
	* checkBox.setText(RefactoringMessages
	* .ExtractMethodInputPage_duplicates_none); } else if (duplicates == 1)
	* { checkBox.setText(RefactoringMessages.
	* ExtractMethodInputPage_duplicates_single); } else {
	* checkBox.setText(Messages
	* .format(RefactoringMessages.ExtractMethodInputPage_duplicates_multi,
	* new Integer(duplicates))); }
	* checkBox.setSelection(fRefactoring.getReplaceDuplicates());
	* checkBox.setEnabled(duplicates > 0);
	* checkBox.addSelectionListener(new SelectionAdapter() { public void
	* widgetSelected(SelectionEvent e) {
	* fRefactoring.setReplaceDuplicates(((Button) e.widget)
	* .getSelection()); } }); layouter.perform(checkBox);
	*/

	label = new Label(result, SWT.SEPARATOR \| SWT.HORIZONTAL);
	label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
	layouter.perform(label);

	createSignaturePreview(result, layouter);

	Dialog.applyDialogFont(result);
	/*
	* PlatformUI .getWorkbench() .getHelpSystem() .setHelp(getControl(),
	* IJavaHelpContextIds.EXTRACT_METHOD_WIZARD_PAGE);
	*/
	}

	/*
	* private String getLabel(ASTNode node) { if (node instanceof
	* AbstractTypeDeclaration) { return ((AbstractTypeDeclaration)
	* node).getName().getIdentifier(); } else if (node instanceof
	* AnonymousClassDeclaration) { if (node.getLocationInParent() ==
	* ClassInstanceCreation.ANONYMOUS_CLASS_DECLARATION_PROPERTY) {
	* ClassInstanceCreation creation = (ClassInstanceCreation) node
	* .getParent(); return Messages
	* .format(RefactoringMessages.ExtractMethodInputPage_anonymous_type_label,
	* BasicElementLabels.getJavaElementName(ASTNodes
	* .asString(creation.getType()))); } else if (node.getLocationInParent() ==
	* EnumConstantDeclaration.ANONYMOUS_CLASS_DECLARATION_PROPERTY) {
	* EnumConstantDeclaration decl = (EnumConstantDeclaration) node
	* .getParent(); return decl.getName().getIdentifier(); } } return
	* "UNKNOWN"; //$NON-NLS-1$ }
	*/

	private Text createTextInputField(Composite parent, int style) {
	Text result = new Text(parent, style);
	result.addModifyListener(new ModifyListener() {
	public void modifyText(ModifyEvent e) {
	textModified(getText());
	}
	});
	TextFieldNavigationHandler.install(result);
	return result;
	}

	private String getText() {
	if (fTextField == null)
	return null;
	return fTextField.getText();
	}

	private String getLabelText() {
	return RefactoringMessages.ExtractMethodInputPage_label_text;
	}

	/*
	* private void setVisibility(Integer visibility) {
	* fRefactoring.setVisibility(visibility.intValue());
	* updatePreview(getText()); }
	*
	* private void setRethrowRuntimeException(boolean value) {
	* fSettings.put(THROW_RUNTIME_EXCEPTIONS, value);
	* fRefactoring.setThrowRuntimeExceptions(value); updatePreview(getText());
	* }
	*
	* private boolean computeGenerateJavadoc() { boolean result =
	* fRefactoring.getGenerateJavadoc(); if (result) return result; return
	* fSettings.getBoolean(GENERATE_JAVADOC); }
	*
	* private void setGenerateJavadoc(boolean value) {
	* fSettings.put(GENERATE_JAVADOC, value);
	* fRefactoring.setGenerateJavadoc(value); }
	*/

	private void createSignaturePreview(Composite composite,
	RowLayouter layouter) {
	Label previewLabel = new Label(composite, SWT.NONE);
	previewLabel
	.setText(RefactoringMessages.ExtractMethodInputPage_signature_preview);
	layouter.perform(previewLabel);

	IDLTKUILanguageToolkit toolkit = DLTKUILanguageManager
	.getLanguageToolkit(JavaScriptNature.NATURE_ID);
	IPreferenceStore store = toolkit.getCombinedPreferenceStore();
	fSignaturePreview = new ScriptSourceViewer(composite, null, null,
	false,
	SWT.READ_ONLY \| SWT.V_SCROLL \| SWT.WRAP /* \| SWT.BORDER */,
	store);
	fSignaturePreview.configure(new JavascriptSourceViewerConfiguration(
	toolkit.getTextTools().getColorManager(), store, null, null));
	// fSignaturePreview.getTextWidget().setFont(
	// JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT));
	fSignaturePreview.getTextWidget().setBackground(
	composite.getBackground());
	fSignaturePreview.setDocument(fSignaturePreviewDocument);
	fSignaturePreview.setEditable(false);

	// Layouting problems with wrapped text: see
	// https://bugs.eclipse.org/bugs/show_bug.cgi?id=9866
	Control signaturePreviewControl = fSignaturePreview.getControl();
	PixelConverter pixelConverter = new PixelConverter(
	signaturePreviewControl);
	GridData gdata = new GridData(GridData.FILL_BOTH);
	gdata.widthHint = pixelConverter.convertWidthInCharsToPixels(50);
	gdata.heightHint = pixelConverter.convertHeightInCharsToPixels(2);
	signaturePreviewControl.setLayoutData(gdata);
	layouter.perform(signaturePreviewControl);
	}

	private void updatePreview(String text) {
	if (fSignaturePreview == null)
	return;

	if (text.length() == 0)
	text = "someMethodName"; //$NON-NLS-1$

	int top = fSignaturePreview.getTextWidget().getTopPixel();
	String signature;
	try {
	signature = fRefactoring.getSignature(text);
	} catch (IllegalArgumentException e) {
	signature = ""; //$NON-NLS-1$
	}
	fSignaturePreviewDocument.set(signature);
	fSignaturePreview.getTextWidget().setTopPixel(top);
	}

	private void loadSettings() {
	fSettings = getDialogSettings().getSection(
	ExtractMethodWizard.DIALOG_SETTING_SECTION);
	if (fSettings == null) {
	fSettings = getDialogSettings().addNewSection(
	ExtractMethodWizard.DIALOG_SETTING_SECTION);
	/*
	* fSettings.put(THROW_RUNTIME_EXCEPTIONS, false); fSettings
	* .put(GENERATE_JAVADOC, JavaPreferencesSettings
	* .getCodeGenerationSettings(fRefactoring .getCompilationUnit()
	* .getJavaProject()).createComments);
	* fSettings.put(ACCESS_MODIFIER, Modifier.PRIVATE);
	*/
	}
	/*
	* fRefactoring.setThrowRuntimeExceptions(fSettings
	* .getBoolean(THROW_RUNTIME_EXCEPTIONS)); final String accessModifier =
	* fSettings.get(ACCESS_MODIFIER); if (accessModifier != null) {
	* fRefactoring.setVisibility(Integer.parseInt(accessModifier)); }
	*/
	}

	// ---- Input validation
	// ------------------------------------------------------

	@Override
	public void setVisible(boolean visible) {
	if (visible) {
	if (fFirstTime) {
	fFirstTime = false;
	setPageComplete(false);
	updatePreview(getText());
	fTextField.setFocus();
	} else {
	setPageComplete(validatePage(true));
	}
	}
	super.setVisible(visible);
	}

	private void textModified(String text) {
	fRefactoring.setMethodName(text);
	RefactoringStatus status = validatePage(true);
	if (!status.hasFatalError()) {
	updatePreview(text);
	} else {
	fSignaturePreviewDocument.set(""); //$NON-NLS-1$
	}
	setPageComplete(status);
	}

	private void parameterModified() {
	updatePreview(getText());
	setPageComplete(validatePage(false));
	}

	private RefactoringStatus validatePage(boolean text) {
	RefactoringStatus result = new RefactoringStatus();
	if (text) {
	result.merge(validateMethodName());
	result.merge(validateParameters());
	} else {
	result.merge(validateParameters());
	result.merge(validateMethodName());
	}
	return result;
	}

	private RefactoringStatus validateMethodName() {
	RefactoringStatus result = new RefactoringStatus();
	String text = getText();
	if ("".equals(text)) { //$NON-NLS-1$
	result.addFatalError(RefactoringMessages.ExtractMethodInputPage_validation_emptyMethodName);
	return result;
	}
	result.merge(fRefactoring.checkMethodName());
	return result;
	}

	private RefactoringStatus validateParameters() {
	RefactoringStatus result = new RefactoringStatus();
	List parameters = fRefactoring.getParameterInfos();
	for (Iterator iter = parameters.iterator(); iter.hasNext();) {
	ParameterInfo info = (ParameterInfo) iter.next();
	if ("".equals(info.getNewName())) { //$NON-NLS-1$
	result.addFatalError(RefactoringMessages.ExtractMethodInputPage_validation_emptyParameterName);
	return result;
	}
	}
	result.merge(fRefactoring.checkParameterNames());
	// result.merge(fRefactoring.checkVarargOrder());
	return result;
	}
	}