content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.wst.jsdt.ui.wizards;
  
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.core.runtime.IProgressMonitor;
  import org.eclipse.core.runtime.IStatus;
  import org.eclipse.core.runtime.SubProgressMonitor;
  import org.eclipse.jface.dialogs.Dialog;
  import org.eclipse.jface.dialogs.IDialogSettings;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.layout.GridLayout;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Control;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.IJavaScriptElement;
  import org.eclipse.wst.jsdt.core.IType;
  import org.eclipse.wst.jsdt.core.Signature;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.wizards.NewWizardMessages;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.DialogField;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.LayoutUtil;
  import org.eclipse.wst.jsdt.internal.ui.wizards.dialogfields.SelectionButtonDialogFieldGroup;
  import org.eclipse.wst.jsdt.ui.CodeGeneration;
  
  /**
   * Wizard page to  create a new class. 
   * <p>
   * Note: This class is not intended to be subclassed, but clients can instantiate.
   * To implement a different kind of a new class wizard page, extend <code>NewTypeWizardPage</code>.
   * </p>
   * 
   *
   * Provisional API: This class/interface is part of an interim API that is still under development and expected to
   * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
   * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
   * (repeatedly) as the API evolves. */
  public class NewClassWizardPage extends NewTypeWizardPage {
  	
  	private final static String PAGE_NAME= "NewClassWizardPage"; //$NON-NLS-1$
  	
  	private final static String SETTINGS_CREATEMAIN= "create_main"; //$NON-NLS-1$
  	private final static String SETTINGS_CREATECONSTR= "create_constructor"; //$NON-NLS-1$
  	private final static String SETTINGS_CREATEUNIMPLEMENTED= "create_unimplemented"; //$NON-NLS-1$
  	
  	private SelectionButtonDialogFieldGroup fMethodStubsButtons;
  	
  	/**
  	 * Creates a new <code>NewClassWizardPage</code>
  	 */
  	public NewClassWizardPage() {
  		super(true, PAGE_NAME);
  		
  		setTitle(NewWizardMessages.NewClassWizardPage_title); 
  		setDescription(NewWizardMessages.NewClassWizardPage_description); 
  		
  		String[] buttonNames3= new String[] {
  			NewWizardMessages.NewClassWizardPage_methods_main, NewWizardMessages.NewClassWizardPage_methods_constructors, 
  			NewWizardMessages.NewClassWizardPage_methods_inherited
  		};		
  		fMethodStubsButtons= new SelectionButtonDialogFieldGroup(SWT.CHECK, buttonNames3, 1);
  		fMethodStubsButtons.setLabelText(NewWizardMessages.NewClassWizardPage_methods_label);		 
  	}
  	
  	// -------- Initialization ---------
  	
  	/**
  	 * The wizard owning this page is responsible for calling this method with the
  	 * current selection. The selection is used to initialize the fields of the wizard 
  	 * page.
  	 * 
  	 * @param selection used to initialize the fields
  	 */
  	public void init(IStructuredSelection selection) {
  		IJavaScriptElement jelem= getInitialJavaElement(selection);
  		initContainerPage(jelem);
  		initTypePage(jelem);
  		doStatusUpdate();
  		
  		boolean createMain= false;
  		boolean createConstructors= false;
  		boolean createUnimplemented= true;
  		IDialogSettings dialogSettings= getDialogSettings();
  		if (dialogSettings != null) {
  			IDialogSettings section= dialogSettings.getSection(PAGE_NAME);
  			if (section != null) {
  				createMain= section.getBoolean(SETTINGS_CREATEMAIN);
  				createConstructors= section.getBoolean(SETTINGS_CREATECONSTR);
  				createUnimplemented= section.getBoolean(SETTINGS_CREATEUNIMPLEMENTED);
  			}
  		}
  		
  		setMethodStubSelection(createMain, createConstructors, createUnimplemented, true);
  	}
  	
  	// ------ validation --------
  	private void doStatusUpdate() {
  		// status of all used components
  		IStatus[] status= new IStatus[] {
  			fContainerStatus,
  			isEnclosingTypeSelected() ? fEnclosingTypeStatus : fPackageStatus,
  			fTypeNameStatus,
  			fModifierStatus,
  			fSuperClassStatus,
  			fSuperInterfacesStatus
  		};
  		
  		// the mode severe status will be displayed and the OK button enabled/disabled.
  		updateStatus(status);
  	}
  	
  	
  	/*
  	 * @see NewContainerWizardPage#handleFieldChanged
  	 */
  	protected void handleFieldChanged(String fieldName) {
  		super.handleFieldChanged(fieldName);
  		
  		doStatusUpdate();
  	}
  	
  	
  	// ------ UI --------
  	
  	/*
  	 * @see WizardPage#createControl
  	 */
  	public void createControl(Composite parent) {
  		initializeDialogUnits(parent);
  		
  		Composite composite= new Composite(parent, SWT.NONE);
  		composite.setFont(parent.getFont());
  		
  		int nColumns= 4;
  		
  		GridLayout layout= new GridLayout();
  		layout.numColumns= nColumns;		
  		composite.setLayout(layout);
  		
  		// pick & choose the wanted UI components
  		
  		createContainerControls(composite, nColumns);	
  		createPackageControls(composite, nColumns);	
  		createEnclosingTypeControls(composite, nColumns);
  				
  		createSeparator(composite, nColumns);
  		
  		createTypeNameControls(composite, nColumns);
  		createModifierControls(composite, nColumns);
  			
  		createSuperClassControls(composite, nColumns);
  		createSuperInterfacesControls(composite, nColumns);
  				
  		createMethodStubSelectionControls(composite, nColumns);
  		
  		createCommentControls(composite, nColumns);
  		enableCommentControl(true);
  		
  		setControl(composite);
  			
  		Dialog.applyDialogFont(composite);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IJavaHelpContextIds.NEW_CLASS_WIZARD_PAGE);	
  	}
  	
  	/*
  	 * @see WizardPage#becomesVisible
  	 */
  	public void setVisible(boolean visible) {
  		super.setVisible(visible);
  		if (visible) {
  			setFocus();
  		} else {
  			IDialogSettings dialogSettings= getDialogSettings();
  			if (dialogSettings != null) {
  				IDialogSettings section= dialogSettings.getSection(PAGE_NAME);
  				if (section == null) {
  					section= dialogSettings.addNewSection(PAGE_NAME);
  				}
  				section.put(SETTINGS_CREATEMAIN, isCreateMain());
  				section.put(SETTINGS_CREATECONSTR, isCreateConstructors());
  				section.put(SETTINGS_CREATEUNIMPLEMENTED, isCreateInherited());
  			}
  		}
  	}	
  	
  	private void createMethodStubSelectionControls(Composite composite, int nColumns) {
  		Control labelControl= fMethodStubsButtons.getLabelControl(composite);
  		LayoutUtil.setHorizontalSpan(labelControl, nColumns);
  		
  		DialogField.createEmptySpace(composite);
  		
  		Control buttonGroup= fMethodStubsButtons.getSelectionButtonsGroup(composite);
  		LayoutUtil.setHorizontalSpan(buttonGroup, nColumns - 1);	
  	}
  	
  	/**
  	 * Returns the current selection state of the 'Create Main' checkbox.
  	 * 
  	 * @return the selection state of the 'Create Main' checkbox
  	 */
  	public boolean isCreateMain() {
  		return fMethodStubsButtons.isSelected(0);
  	}
  
  	/**
  	 * Returns the current selection state of the 'Create Constructors' checkbox.
  	 * 
  	 * @return the selection state of the 'Create Constructors' checkbox
  	 */
  	public boolean isCreateConstructors() {
  		return fMethodStubsButtons.isSelected(1);
  	}
  	
  	/**
  	 * Returns the current selection state of the 'Create inherited abstract methods' 
  	 * checkbox.
  	 * 
  	 * @return the selection state of the 'Create inherited abstract methods' checkbox
  	 */
  	public boolean isCreateInherited() {
  		return fMethodStubsButtons.isSelected(2);
  	}
  
  	/**
  	 * Sets the selection state of the method stub checkboxes.
  	 * 
  	 * @param createMain initial selection state of the 'Create Main' checkbox.
  	 * @param createConstructors initial selection state of the 'Create Constructors' checkbox.
  	 * @param createInherited initial selection state of the 'Create inherited abstract methods' checkbox.
  	 * @param canBeModified if <code>true</code> the method stub checkboxes can be changed by 
  	 * the user. If <code>false</code> the buttons are "read-only"
  	 */
  	public void setMethodStubSelection(boolean createMain, boolean createConstructors, boolean createInherited, boolean canBeModified) {
  		fMethodStubsButtons.setSelection(0, createMain);
  		fMethodStubsButtons.setSelection(1, createConstructors);
  		fMethodStubsButtons.setSelection(2, createInherited);
  		
  		fMethodStubsButtons.setEnabled(canBeModified);
  	}	
  	
  	// ---- creation ----------------
  	
  	/*
  	 * @see NewTypeWizardPage#createTypeMembers
  	 */
  	protected void createTypeMembers(IType type, ImportsManager imports, IProgressMonitor monitor) throws CoreException {
  		boolean doMain= isCreateMain();
  		boolean doConstr= isCreateConstructors();
  		boolean doInherited= isCreateInherited();
  		createInheritedMethods(type, doConstr, doInherited, imports, new SubProgressMonitor(monitor, 1));
  
  		if (doMain) {
  			StringBuffer buf= new StringBuffer();
  			final String lineDelim= "\n"; // OK, since content is formatted afterwards //$NON-NLS-1$
  			String comment= CodeGeneration.getMethodComment(type.getJavaScriptUnit(), type.getTypeQualifiedName('.'), "main", new String[] {"args"}, new String[0], Signature.createTypeSignature("void", true), null, lineDelim); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
  			if (comment != null) {
  				buf.append(comment);
  				buf.append(lineDelim);
  			}
  			buf.append("public static void main("); //$NON-NLS-1$
  			buf.append(imports.addImport("java.lang.String")); //$NON-NLS-1$
  			buf.append("[] args) {"); //$NON-NLS-1$
  			buf.append(lineDelim);
  			final String content= CodeGeneration.getMethodBodyContent(type.getJavaScriptUnit(), type.getTypeQualifiedName('.'), "main", false, "", lineDelim); //$NON-NLS-1$ //$NON-NLS-2$
  			if (content != null && content.length() != 0)
  				buf.append(content);
  			buf.append(lineDelim);
  			buf.append("}"); //$NON-NLS-1$
  			type.createMethod(buf.toString(), null, false, null);
  		}
  		
  		if (monitor != null) {
  			monitor.done();
  		}	
  	}
  	
  }
  