org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/jarpackager/JarOptionsPage.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 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.jdt.internal.ui.jarpackager;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IResource;
 import org.eclipse.core.resources.IWorkspace;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Path;

 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.Event;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Text;

 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogSettings;
 import org.eclipse.jface.resource.JFaceResources;
 import org.eclipse.jface.window.Window;
 import org.eclipse.jface.wizard.IWizardPage;
 import org.eclipse.jface.wizard.WizardPage;

 import org.eclipse.ui.dialogs.SaveAsDialog;
 import org.eclipse.ui.PlatformUI;

 import org.eclipse.jdt.internal.corext.util.Messages;

 import org.eclipse.jdt.ui.jarpackager.JarPackageData;

 import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
 import org.eclipse.jdt.internal.ui.JavaPlugin;

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

 /**
  *	Page 2 of the JAR Package wizard
  */
 class JarOptionsPage extends WizardPage implements IJarPackageWizardPage {

 	// Untyped listener
 	private class UntypedListener implements Listener {
 		/*
 		 * Implements method from Listener
 		 */
 		public void handleEvent(Event e) {
 			if (getControl() == null)
 				return;
 			update();
 		}
 	}

 	private JarPackageData fJarPackage;

 	// widgets
 	private Button		fExportErrorsCheckbox;
 	private Button		fExportWarningsCheckbox;
 	private Button		fUseSourceFoldersCheckbox;
 	private Composite	fDescriptionFileGroup;
 	private Button		fSaveDescriptionCheckbox;
 	private Label		fDescriptionFileLabel;
 	private Text		fDescriptionFileText;
 	private Button		fDescriptionFileBrowseButton;
 	private Button		fBuildIfNeededCheckbox;

 	// dialog store id constants
 	private final static String PAGE_NAME= "jarOptionsWizardPage"; //$NON-NLS-1$

 	private final static String STORE_EXPORT_WARNINGS= PAGE_NAME + ".EXPORT_WARNINGS"; //$NON-NLS-1$
 	private final static String STORE_EXPORT_ERRORS= PAGE_NAME + ".EXPORT_ERRORS"; //$NON-NLS-1$
 	private final static String STORE_SAVE_DESCRIPTION= PAGE_NAME + ".SAVE_DESCRIPTION"; //$NON-NLS-1$
 	private final static String STORE_DESCRIPTION_LOCATION= PAGE_NAME + ".DESCRIPTION_LOCATION"; //$NON-NLS-1$
 	private final static String STORE_USE_SRC_FOLDERS= PAGE_NAME + ".STORE_USE_SRC_FOLDERS"; //$NON-NLS-1$
 	private final static String STORE_BUILD_IF_NEEDED= PAGE_NAME + ".BUILD_IF_NEEDED"; //$NON-NLS-1$

 	/**
 	 *	Create an instance of this class
 	 */
 	public JarOptionsPage(JarPackageData jarPackage) {
 		super(PAGE_NAME);
 		setTitle(JarPackagerMessages.JarOptionsPage_title);
 		setDescription(JarPackagerMessages.JarOptionsPage_description);
 		fJarPackage= jarPackage;
 	}

 	/*
 	 * Method declared on IDialogPage.
 	 */
 	public void createControl(Composite parent) {
 		Composite composite= new Composite(parent, SWT.NULL);
 		composite.setLayout(new GridLayout());
 		composite.setLayoutData(
 			new GridData(GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL));

 		createOptionsGroup(composite);

 		restoreWidgetValues();
 		setControl(composite);
 		update();

 		Dialog.applyDialogFont(composite);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IJavaHelpContextIds.JAROPTIONS_WIZARD_PAGE);
 	}

 	/**
 	 *	Create the export options specification widgets.
 	 *
 	 *	@param parent org.eclipse.swt.widgets.Composite
 	 */
 	protected void createOptionsGroup(Composite parent) {

 		initializeDialogUnits(parent);

 		Composite optionsGroup= new Composite(parent, SWT.NONE);
 		GridLayout layout= new GridLayout();
 		layout.marginHeight= 0;
 		optionsGroup.setLayout(layout);

 		createLabel(optionsGroup, JarPackagerMessages.JarOptionsPage_howTreatProblems_label, false);

 		UntypedListener selectionListener= new UntypedListener();

 		fExportErrorsCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
 		fExportErrorsCheckbox.setText(JarPackagerMessages.JarOptionsPage_exportErrors_text);
 		fExportErrorsCheckbox.addListener(SWT.Selection, selectionListener);

 		fExportWarningsCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
 		fExportWarningsCheckbox.setText(JarPackagerMessages.JarOptionsPage_exportWarnings_text);
 		fExportWarningsCheckbox.addListener(SWT.Selection, selectionListener);

 		createSpacer(optionsGroup);

 		fUseSourceFoldersCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
 		fUseSourceFoldersCheckbox.setText(JarPackagerMessages.JarOptionsPage_useSourceFoldersHierarchy);
 		fUseSourceFoldersCheckbox.addListener(SWT.Selection, selectionListener);
 		fUseSourceFoldersCheckbox.setEnabled(fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported());

 		createSpacer(optionsGroup);

 		fBuildIfNeededCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
 		fBuildIfNeededCheckbox.setText(JarPackagerMessages.JarOptionsPage_buildIfNeeded);
 		fBuildIfNeededCheckbox.addListener(SWT.Selection, selectionListener);

 		createSpacer(optionsGroup);

 		fSaveDescriptionCheckbox= new Button(optionsGroup, SWT.CHECK | SWT.LEFT);
 		fSaveDescriptionCheckbox.setText(JarPackagerMessages.JarOptionsPage_saveDescription_text);
 		fSaveDescriptionCheckbox.addListener(SWT.Selection, selectionListener);
 		createDescriptionFileGroup(parent);
 	}

 	/**
 	 * Persists resource specification control setting that are to be restored
 	 * in the next instance of this page. Subclasses wishing to persist
 	 * settings for their controls should extend the hook method
 	 * <code>internalSaveWidgetValues</code>.
 	 */
 	public final void saveWidgetValues() {
 		// update directory names history
 		IDialogSettings settings= getDialogSettings();
 		if (settings != null) {
 			settings.put(STORE_EXPORT_WARNINGS, fJarPackage.exportWarnings());
 			settings.put(STORE_EXPORT_ERRORS, fJarPackage.areErrorsExported());
 			settings.put(STORE_USE_SRC_FOLDERS, fJarPackage.useSourceFolderHierarchy());
 			settings.put(STORE_BUILD_IF_NEEDED, fJarPackage.isBuildingIfNeeded());
 			settings.put(STORE_SAVE_DESCRIPTION, fJarPackage.isDescriptionSaved());
 			settings.put(STORE_DESCRIPTION_LOCATION, fJarPackage.getDescriptionLocation().toString());
 		}
 		// Allow subclasses to save values
 		internalSaveWidgetValues();
 	}

 	/**
 	 * Hook method for subclasses to persist their settings.
 	 */
 	protected void internalSaveWidgetValues() {
 	}

 	/**
 	 *	Hook method for restoring widget values to the values that they held
 	 *	last time this wizard was used to completion.
 	 */
 	protected void restoreWidgetValues() {
 		if (!((JarPackageWizard)getWizard()).isInitializingFromJarPackage())
 			initializeJarPackage();

 		fExportWarningsCheckbox.setSelection(fJarPackage.exportWarnings());
 		fExportErrorsCheckbox.setSelection(fJarPackage.areErrorsExported());
 		fBuildIfNeededCheckbox.setSelection(fJarPackage.isBuildingIfNeeded());
 		fUseSourceFoldersCheckbox.setSelection(fJarPackage.useSourceFolderHierarchy());
 		fSaveDescriptionCheckbox.setSelection(fJarPackage.isDescriptionSaved());
 		fDescriptionFileText.setText(fJarPackage.getDescriptionLocation().toString());
 	}

 	/**
 	 *	Initializes the JAR package from last used wizard page values.
 	 */
 	protected void initializeJarPackage() {
 		IDialogSettings settings= getDialogSettings();
 		if (settings != null) {
 			fJarPackage.setExportWarnings(settings.getBoolean(STORE_EXPORT_WARNINGS));
 			fJarPackage.setExportErrors(settings.getBoolean(STORE_EXPORT_ERRORS));
 			fJarPackage.setUseSourceFolderHierarchy(settings.getBoolean(STORE_USE_SRC_FOLDERS));
 			fJarPackage.setSaveDescription(false); // bug 15877
 			String pathStr= settings.get(STORE_DESCRIPTION_LOCATION);
 			if (pathStr == null)
 				pathStr= ""; //$NON-NLS-1$
 			fJarPackage.setDescriptionLocation(new Path(pathStr));
 			if (settings.get(STORE_BUILD_IF_NEEDED) != null)
 				fJarPackage.setBuildIfNeeded(settings.getBoolean(STORE_BUILD_IF_NEEDED));
 		}
 	}

 	private void update() {
 		updateModel();
 		updateWidgetEnablements();
 		updatePageCompletion();
 	}

 	/**
 	 *	Stores the widget values in the JAR package.
 	 */
 	protected void updateModel() {
 		if (getControl() == null)
 			return;
 		fJarPackage.setExportWarnings(fExportWarningsCheckbox.getSelection());
 		fJarPackage.setExportErrors(fExportErrorsCheckbox.getSelection());
 		fJarPackage.setBuildIfNeeded(fBuildIfNeededCheckbox.getSelection());
 		fJarPackage.setSaveDescription(fSaveDescriptionCheckbox.getSelection());
 		fJarPackage.setDescriptionLocation(new Path(fDescriptionFileText.getText()));
 		fJarPackage.setUseSourceFolderHierarchy(fUseSourceFoldersCheckbox.getSelection());
 	}

 	/**
 	 *	Open an appropriate destination browser so that the user can specify a source
 	 *	to import from
 	 */
 	protected void handleDescriptionFileBrowseButtonPressed() {
 		SaveAsDialog dialog= new SaveAsDialog(getContainer().getShell());
 		dialog.create();
 		dialog.getShell().setText(JarPackagerMessages.JarOptionsPage_saveAsDialog_title);
 		dialog.setMessage(JarPackagerMessages.JarOptionsPage_saveAsDialog_message);
 		dialog.setOriginalFile(createFileHandle(fJarPackage.getDescriptionLocation()));
 		if (dialog.open() == Window.OK) {
 			IPath path= dialog.getResult();
 			path= path.removeFileExtension().addFileExtension(JarPackagerUtil.DESCRIPTION_EXTENSION);
 			fDescriptionFileText.setText(path.toString());
 		}
 	}

 	/**
 	 * Updates the enablements of this page's controls. Subclasses may extend.
 	 */
 	protected void updateWidgetEnablements() {
 		boolean saveDescription= fSaveDescriptionCheckbox.getSelection();
 		fDescriptionFileGroup.setEnabled(saveDescription);
 		fDescriptionFileBrowseButton.setEnabled(saveDescription);
 		fDescriptionFileText.setEnabled(saveDescription);
 		fDescriptionFileLabel.setEnabled(saveDescription);

 		boolean exportClassFiles= fJarPackage.areClassFilesExported() && !fJarPackage.areOutputFoldersExported();
 		fExportWarningsCheckbox.setEnabled(exportClassFiles);
 		fExportErrorsCheckbox.setEnabled(exportClassFiles);

 		boolean isAutobuilding= ResourcesPlugin.getWorkspace().isAutoBuilding();
 		fBuildIfNeededCheckbox.setEnabled(exportClassFiles && !isAutobuilding);

 		fUseSourceFoldersCheckbox.setEnabled(fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported());
 	}

 	/*
 	 * Implements method from IJarPackageWizardPage
 	 */
 	public boolean isPageComplete() {
 		if (fJarPackage.isDescriptionSaved()){
 			if (fJarPackage.getDescriptionLocation().toString().length() == 0) {
 				setErrorMessage(null);
 				return false;
 			}
 			IPath location= fJarPackage.getDescriptionLocation();
 			if (!location.toString().startsWith("/")) { //$NON-NLS-1$
 				setErrorMessage(JarPackagerMessages.JarOptionsPage_error_descriptionMustBeAbsolute);
 				return false;
 			}
 			IResource resource= findResource(location);
 			if (resource != null && resource.getType() != IResource.FILE) {
 				setErrorMessage(JarPackagerMessages.JarOptionsPage_error_descriptionMustNotBeExistingContainer);
 				return false;
 			}
 			resource= findResource(location.removeLastSegments(1));
 			if (resource == null || resource.getType() == IResource.FILE) {
 				setErrorMessage(JarPackagerMessages.JarOptionsPage_error_descriptionContainerDoesNotExist);
 				return false;
 			}
 			String fileExtension= fJarPackage.getDescriptionLocation().getFileExtension();
 			if (fileExtension == null || !fileExtension.equals(JarPackagerUtil.DESCRIPTION_EXTENSION)) {
 				setErrorMessage(Messages.format(JarPackagerMessages.JarOptionsPage_error_invalidDescriptionExtension, JarPackagerUtil.DESCRIPTION_EXTENSION));
 				return false;
 			}
 		}
 		setErrorMessage(null);
 		return true;
 	}

 	public boolean canFlipToNextPage() {
 		return fJarPackage.areGeneratedFilesExported() && super.canFlipToNextPage();
 	}

 	/*
 	 * Overrides method from WizardDataTransferPage
 	 */
 	protected void createDescriptionFileGroup(Composite parent) {
 		// destination specification group
 		fDescriptionFileGroup= new Composite(parent, SWT.NONE);
 		GridLayout layout= new GridLayout();
 		layout.numColumns= 3;
 		fDescriptionFileGroup.setLayout(layout);
 		fDescriptionFileGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL));

 		fDescriptionFileLabel= new Label(fDescriptionFileGroup, SWT.NONE);
 		fDescriptionFileLabel.setText(JarPackagerMessages.JarOptionsPage_descriptionFile_label);

 		// destination name entry field
 		fDescriptionFileText= new Text(fDescriptionFileGroup, SWT.SINGLE | SWT.BORDER);
 		fDescriptionFileText.addListener(SWT.Modify, new UntypedListener());
 		GridData data= new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
 		data.widthHint= convertWidthInCharsToPixels(40);
 		fDescriptionFileText.setLayoutData(data);

 		// destination browse button
 		fDescriptionFileBrowseButton= new Button(fDescriptionFileGroup, SWT.PUSH);
 		fDescriptionFileBrowseButton.setText(JarPackagerMessages.JarOptionsPage_browseButton_text);
 		fDescriptionFileBrowseButton.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
 		SWTUtil.setButtonDimensionHint(fDescriptionFileBrowseButton);
 		fDescriptionFileBrowseButton.addSelectionListener(new SelectionAdapter() {
 			public void widgetSelected(SelectionEvent e) {
 				handleDescriptionFileBrowseButtonPressed();
 			}
 		});
 	}

 	/**
 	 * Creates a file resource handle for the file with the given workspace path.
 	 * This method does not create the file resource; this is the responsibility
 	 * of <code>createFile</code>.
 	 *
 	 * @param filePath the path of the file resource to create a handle for
 	 * @return the new file resource handle
 	 */
 	protected IFile createFileHandle(IPath filePath) {
 		if (filePath.isValidPath(filePath.toString()) && filePath.segmentCount() >= 2)
 			return JavaPlugin.getWorkspace().getRoot().getFile(filePath);
 		else
 			return null;
 	}
 	/*
 	 * Method declared on IWizardPage.
 	 */
 	public void setPreviousPage(IWizardPage page) {
 		super.setPreviousPage(page);
 		updateWidgetEnablements();
 		if (getControl() != null)
 			updatePageCompletion();
 	}

 	/*
 	 * Implements method from IJarPackageWizardPage.
 	 */
 	public void finish() {
 		saveWidgetValues();
 	}

 	/**
 	 * Creates a new label with a bold font.
 	 *
 	 * @param parent the parent control
 	 * @param text the label text
 	 * @return the new label control
 	 */
 	protected Label createLabel(Composite parent, String text, boolean bold) {
 		Label label= new Label(parent, SWT.NONE);
 		if (bold)
 			label.setFont(JFaceResources.getBannerFont());
 		label.setText(text);
 		GridData data= new GridData();
 		data.verticalAlignment= GridData.FILL;
 		data.horizontalAlignment= GridData.FILL;
 		label.setLayoutData(data);
 		return label;
 	}

 	/**
 	 * Creates a horizontal spacer line that fills the width of its container.
 	 *
 	 * @param parent the parent control
 	 */
 	protected void createSpacer(Composite parent) {
 		Label spacer= new Label(parent, SWT.NONE);
 		GridData data= new GridData();
 		data.horizontalAlignment= GridData.FILL;
 		data.verticalAlignment= GridData.BEGINNING;
 		spacer.setLayoutData(data);
 	}

 	/**
 	 * Determine if the page is complete and update the page appropriately.
 	 */
 	protected void updatePageCompletion() {
 		boolean pageComplete= isPageComplete();
 		setPageComplete(pageComplete);
 		if (pageComplete) {
 			setErrorMessage(null);
 		}
 	}

 	/**
 	 * Returns the resource for the specified path.
 	 *
 	 * @param path	the path for which the resource should be returned
 	 * @return the resource specified by the path or <code>null</code>
 	 */
 	protected IResource findResource(IPath path) {
 		IWorkspace workspace= JavaPlugin.getWorkspace();
 		IStatus result= workspace.validatePath(
 							path.toString(),
 							IResource.ROOT | IResource.PROJECT | IResource.FOLDER | IResource.FILE);
 		if (result.isOK() && workspace.getRoot().exists(path))
 			return workspace.getRoot().findMember(path);
 		return null;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 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.jdt.internal.ui.jarpackager;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IResource;
	import org.eclipse.core.resources.IWorkspace;
	import org.eclipse.core.resources.ResourcesPlugin;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.IStatus;
	import org.eclipse.core.runtime.Path;

	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.Event;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Text;

	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogSettings;
	import org.eclipse.jface.resource.JFaceResources;
	import org.eclipse.jface.window.Window;
	import org.eclipse.jface.wizard.IWizardPage;
	import org.eclipse.jface.wizard.WizardPage;

	import org.eclipse.ui.dialogs.SaveAsDialog;
	import org.eclipse.ui.PlatformUI;

	import org.eclipse.jdt.internal.corext.util.Messages;

	import org.eclipse.jdt.ui.jarpackager.JarPackageData;

	import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
	import org.eclipse.jdt.internal.ui.JavaPlugin;

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

	/**
	* Page 2 of the JAR Package wizard
	*/
	class JarOptionsPage extends WizardPage implements IJarPackageWizardPage {

	// Untyped listener
	private class UntypedListener implements Listener {
	/*
	* Implements method from Listener
	*/
	public void handleEvent(Event e) {
	if (getControl() == null)
	return;
	update();
	}
	}

	private JarPackageData fJarPackage;

	// widgets
	private Button fExportErrorsCheckbox;
	private Button fExportWarningsCheckbox;
	private Button fUseSourceFoldersCheckbox;
	private Composite fDescriptionFileGroup;
	private Button fSaveDescriptionCheckbox;
	private Label fDescriptionFileLabel;
	private Text fDescriptionFileText;
	private Button fDescriptionFileBrowseButton;
	private Button fBuildIfNeededCheckbox;

	// dialog store id constants
	private final static String PAGE_NAME= "jarOptionsWizardPage"; //$NON-NLS-1$

	private final static String STORE_EXPORT_WARNINGS= PAGE_NAME + ".EXPORT_WARNINGS"; //$NON-NLS-1$
	private final static String STORE_EXPORT_ERRORS= PAGE_NAME + ".EXPORT_ERRORS"; //$NON-NLS-1$
	private final static String STORE_SAVE_DESCRIPTION= PAGE_NAME + ".SAVE_DESCRIPTION"; //$NON-NLS-1$
	private final static String STORE_DESCRIPTION_LOCATION= PAGE_NAME + ".DESCRIPTION_LOCATION"; //$NON-NLS-1$
	private final static String STORE_USE_SRC_FOLDERS= PAGE_NAME + ".STORE_USE_SRC_FOLDERS"; //$NON-NLS-1$
	private final static String STORE_BUILD_IF_NEEDED= PAGE_NAME + ".BUILD_IF_NEEDED"; //$NON-NLS-1$

	/**
	* Create an instance of this class
	*/
	public JarOptionsPage(JarPackageData jarPackage) {
	super(PAGE_NAME);
	setTitle(JarPackagerMessages.JarOptionsPage_title);
	setDescription(JarPackagerMessages.JarOptionsPage_description);
	fJarPackage= jarPackage;
	}

	/*
	* Method declared on IDialogPage.
	*/
	public void createControl(Composite parent) {
	Composite composite= new Composite(parent, SWT.NULL);
	composite.setLayout(new GridLayout());
	composite.setLayoutData(
	new GridData(GridData.VERTICAL_ALIGN_FILL \| GridData.HORIZONTAL_ALIGN_FILL));

	createOptionsGroup(composite);

	restoreWidgetValues();
	setControl(composite);
	update();

	Dialog.applyDialogFont(composite);
	PlatformUI.getWorkbench().getHelpSystem().setHelp(composite, IJavaHelpContextIds.JAROPTIONS_WIZARD_PAGE);
	}

	/**
	* Create the export options specification widgets.
	*
	* @param parent org.eclipse.swt.widgets.Composite
	*/
	protected void createOptionsGroup(Composite parent) {

	initializeDialogUnits(parent);

	Composite optionsGroup= new Composite(parent, SWT.NONE);
	GridLayout layout= new GridLayout();
	layout.marginHeight= 0;
	optionsGroup.setLayout(layout);

	createLabel(optionsGroup, JarPackagerMessages.JarOptionsPage_howTreatProblems_label, false);

	UntypedListener selectionListener= new UntypedListener();

	fExportErrorsCheckbox= new Button(optionsGroup, SWT.CHECK \| SWT.LEFT);
	fExportErrorsCheckbox.setText(JarPackagerMessages.JarOptionsPage_exportErrors_text);
	fExportErrorsCheckbox.addListener(SWT.Selection, selectionListener);

	fExportWarningsCheckbox= new Button(optionsGroup, SWT.CHECK \| SWT.LEFT);
	fExportWarningsCheckbox.setText(JarPackagerMessages.JarOptionsPage_exportWarnings_text);
	fExportWarningsCheckbox.addListener(SWT.Selection, selectionListener);

	createSpacer(optionsGroup);

	fUseSourceFoldersCheckbox= new Button(optionsGroup, SWT.CHECK \| SWT.LEFT);
	fUseSourceFoldersCheckbox.setText(JarPackagerMessages.JarOptionsPage_useSourceFoldersHierarchy);
	fUseSourceFoldersCheckbox.addListener(SWT.Selection, selectionListener);
	fUseSourceFoldersCheckbox.setEnabled(fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported());

	createSpacer(optionsGroup);

	fBuildIfNeededCheckbox= new Button(optionsGroup, SWT.CHECK \| SWT.LEFT);
	fBuildIfNeededCheckbox.setText(JarPackagerMessages.JarOptionsPage_buildIfNeeded);
	fBuildIfNeededCheckbox.addListener(SWT.Selection, selectionListener);

	createSpacer(optionsGroup);

	fSaveDescriptionCheckbox= new Button(optionsGroup, SWT.CHECK \| SWT.LEFT);
	fSaveDescriptionCheckbox.setText(JarPackagerMessages.JarOptionsPage_saveDescription_text);
	fSaveDescriptionCheckbox.addListener(SWT.Selection, selectionListener);
	createDescriptionFileGroup(parent);
	}

	/**
	* Persists resource specification control setting that are to be restored
	* in the next instance of this page. Subclasses wishing to persist
	* settings for their controls should extend the hook method
	* <code>internalSaveWidgetValues</code>.
	*/
	public final void saveWidgetValues() {
	// update directory names history
	IDialogSettings settings= getDialogSettings();
	if (settings != null) {
	settings.put(STORE_EXPORT_WARNINGS, fJarPackage.exportWarnings());
	settings.put(STORE_EXPORT_ERRORS, fJarPackage.areErrorsExported());
	settings.put(STORE_USE_SRC_FOLDERS, fJarPackage.useSourceFolderHierarchy());
	settings.put(STORE_BUILD_IF_NEEDED, fJarPackage.isBuildingIfNeeded());
	settings.put(STORE_SAVE_DESCRIPTION, fJarPackage.isDescriptionSaved());
	settings.put(STORE_DESCRIPTION_LOCATION, fJarPackage.getDescriptionLocation().toString());
	}
	// Allow subclasses to save values
	internalSaveWidgetValues();
	}

	/**
	* Hook method for subclasses to persist their settings.
	*/
	protected void internalSaveWidgetValues() {
	}

	/**
	* Hook method for restoring widget values to the values that they held
	* last time this wizard was used to completion.
	*/
	protected void restoreWidgetValues() {
	if (!((JarPackageWizard)getWizard()).isInitializingFromJarPackage())
	initializeJarPackage();

	fExportWarningsCheckbox.setSelection(fJarPackage.exportWarnings());
	fExportErrorsCheckbox.setSelection(fJarPackage.areErrorsExported());
	fBuildIfNeededCheckbox.setSelection(fJarPackage.isBuildingIfNeeded());
	fUseSourceFoldersCheckbox.setSelection(fJarPackage.useSourceFolderHierarchy());
	fSaveDescriptionCheckbox.setSelection(fJarPackage.isDescriptionSaved());
	fDescriptionFileText.setText(fJarPackage.getDescriptionLocation().toString());
	}

	/**
	* Initializes the JAR package from last used wizard page values.
	*/
	protected void initializeJarPackage() {
	IDialogSettings settings= getDialogSettings();
	if (settings != null) {
	fJarPackage.setExportWarnings(settings.getBoolean(STORE_EXPORT_WARNINGS));
	fJarPackage.setExportErrors(settings.getBoolean(STORE_EXPORT_ERRORS));
	fJarPackage.setUseSourceFolderHierarchy(settings.getBoolean(STORE_USE_SRC_FOLDERS));
	fJarPackage.setSaveDescription(false); // bug 15877
	String pathStr= settings.get(STORE_DESCRIPTION_LOCATION);
	if (pathStr == null)
	pathStr= ""; //$NON-NLS-1$
	fJarPackage.setDescriptionLocation(new Path(pathStr));
	if (settings.get(STORE_BUILD_IF_NEEDED) != null)
	fJarPackage.setBuildIfNeeded(settings.getBoolean(STORE_BUILD_IF_NEEDED));
	}
	}

	private void update() {
	updateModel();
	updateWidgetEnablements();
	updatePageCompletion();
	}

	/**
	* Stores the widget values in the JAR package.
	*/
	protected void updateModel() {
	if (getControl() == null)
	return;
	fJarPackage.setExportWarnings(fExportWarningsCheckbox.getSelection());
	fJarPackage.setExportErrors(fExportErrorsCheckbox.getSelection());
	fJarPackage.setBuildIfNeeded(fBuildIfNeededCheckbox.getSelection());
	fJarPackage.setSaveDescription(fSaveDescriptionCheckbox.getSelection());
	fJarPackage.setDescriptionLocation(new Path(fDescriptionFileText.getText()));
	fJarPackage.setUseSourceFolderHierarchy(fUseSourceFoldersCheckbox.getSelection());
	}

	/**
	* Open an appropriate destination browser so that the user can specify a source
	* to import from
	*/
	protected void handleDescriptionFileBrowseButtonPressed() {
	SaveAsDialog dialog= new SaveAsDialog(getContainer().getShell());
	dialog.create();
	dialog.getShell().setText(JarPackagerMessages.JarOptionsPage_saveAsDialog_title);
	dialog.setMessage(JarPackagerMessages.JarOptionsPage_saveAsDialog_message);
	dialog.setOriginalFile(createFileHandle(fJarPackage.getDescriptionLocation()));
	if (dialog.open() == Window.OK) {
	IPath path= dialog.getResult();
	path= path.removeFileExtension().addFileExtension(JarPackagerUtil.DESCRIPTION_EXTENSION);
	fDescriptionFileText.setText(path.toString());
	}
	}

	/**
	* Updates the enablements of this page's controls. Subclasses may extend.
	*/
	protected void updateWidgetEnablements() {
	boolean saveDescription= fSaveDescriptionCheckbox.getSelection();
	fDescriptionFileGroup.setEnabled(saveDescription);
	fDescriptionFileBrowseButton.setEnabled(saveDescription);
	fDescriptionFileText.setEnabled(saveDescription);
	fDescriptionFileLabel.setEnabled(saveDescription);

	boolean exportClassFiles= fJarPackage.areClassFilesExported() && !fJarPackage.areOutputFoldersExported();
	fExportWarningsCheckbox.setEnabled(exportClassFiles);
	fExportErrorsCheckbox.setEnabled(exportClassFiles);

	boolean isAutobuilding= ResourcesPlugin.getWorkspace().isAutoBuilding();
	fBuildIfNeededCheckbox.setEnabled(exportClassFiles && !isAutobuilding);

	fUseSourceFoldersCheckbox.setEnabled(fJarPackage.areJavaFilesExported() && !fJarPackage.areGeneratedFilesExported());
	}

	/*
	* Implements method from IJarPackageWizardPage
	*/
	public boolean isPageComplete() {
	if (fJarPackage.isDescriptionSaved()){
	if (fJarPackage.getDescriptionLocation().toString().length() == 0) {
	setErrorMessage(null);
	return false;
	}
	IPath location= fJarPackage.getDescriptionLocation();
	if (!location.toString().startsWith("/")) { //$NON-NLS-1$
	setErrorMessage(JarPackagerMessages.JarOptionsPage_error_descriptionMustBeAbsolute);
	return false;
	}
	IResource resource= findResource(location);
	if (resource != null && resource.getType() != IResource.FILE) {
	setErrorMessage(JarPackagerMessages.JarOptionsPage_error_descriptionMustNotBeExistingContainer);
	return false;
	}
	resource= findResource(location.removeLastSegments(1));
	if (resource == null \|\| resource.getType() == IResource.FILE) {
	setErrorMessage(JarPackagerMessages.JarOptionsPage_error_descriptionContainerDoesNotExist);
	return false;
	}
	String fileExtension= fJarPackage.getDescriptionLocation().getFileExtension();
	if (fileExtension == null \|\| !fileExtension.equals(JarPackagerUtil.DESCRIPTION_EXTENSION)) {
	setErrorMessage(Messages.format(JarPackagerMessages.JarOptionsPage_error_invalidDescriptionExtension, JarPackagerUtil.DESCRIPTION_EXTENSION));
	return false;
	}
	}
	setErrorMessage(null);
	return true;
	}

	public boolean canFlipToNextPage() {
	return fJarPackage.areGeneratedFilesExported() && super.canFlipToNextPage();
	}

	/*
	* Overrides method from WizardDataTransferPage
	*/
	protected void createDescriptionFileGroup(Composite parent) {
	// destination specification group
	fDescriptionFileGroup= new Composite(parent, SWT.NONE);
	GridLayout layout= new GridLayout();
	layout.numColumns= 3;
	fDescriptionFileGroup.setLayout(layout);
	fDescriptionFileGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL \| GridData.VERTICAL_ALIGN_FILL \| GridData.GRAB_HORIZONTAL));

	fDescriptionFileLabel= new Label(fDescriptionFileGroup, SWT.NONE);
	fDescriptionFileLabel.setText(JarPackagerMessages.JarOptionsPage_descriptionFile_label);

	// destination name entry field
	fDescriptionFileText= new Text(fDescriptionFileGroup, SWT.SINGLE \| SWT.BORDER);
	fDescriptionFileText.addListener(SWT.Modify, new UntypedListener());
	GridData data= new GridData(GridData.HORIZONTAL_ALIGN_FILL \| GridData.GRAB_HORIZONTAL);
	data.widthHint= convertWidthInCharsToPixels(40);
	fDescriptionFileText.setLayoutData(data);

	// destination browse button
	fDescriptionFileBrowseButton= new Button(fDescriptionFileGroup, SWT.PUSH);
	fDescriptionFileBrowseButton.setText(JarPackagerMessages.JarOptionsPage_browseButton_text);
	fDescriptionFileBrowseButton.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
	SWTUtil.setButtonDimensionHint(fDescriptionFileBrowseButton);
	fDescriptionFileBrowseButton.addSelectionListener(new SelectionAdapter() {
	public void widgetSelected(SelectionEvent e) {
	handleDescriptionFileBrowseButtonPressed();
	}
	});
	}

	/**
	* Creates a file resource handle for the file with the given workspace path.
	* This method does not create the file resource; this is the responsibility
	* of <code>createFile</code>.
	*
	* @param filePath the path of the file resource to create a handle for
	* @return the new file resource handle
	*/
	protected IFile createFileHandle(IPath filePath) {
	if (filePath.isValidPath(filePath.toString()) && filePath.segmentCount() >= 2)
	return JavaPlugin.getWorkspace().getRoot().getFile(filePath);
	else
	return null;
	}
	/*
	* Method declared on IWizardPage.
	*/
	public void setPreviousPage(IWizardPage page) {
	super.setPreviousPage(page);
	updateWidgetEnablements();
	if (getControl() != null)
	updatePageCompletion();
	}

	/*
	* Implements method from IJarPackageWizardPage.
	*/
	public void finish() {
	saveWidgetValues();
	}

	/**
	* Creates a new label with a bold font.
	*
	* @param parent the parent control
	* @param text the label text
	* @return the new label control
	*/
	protected Label createLabel(Composite parent, String text, boolean bold) {
	Label label= new Label(parent, SWT.NONE);
	if (bold)
	label.setFont(JFaceResources.getBannerFont());
	label.setText(text);
	GridData data= new GridData();
	data.verticalAlignment= GridData.FILL;
	data.horizontalAlignment= GridData.FILL;
	label.setLayoutData(data);
	return label;
	}

	/**
	* Creates a horizontal spacer line that fills the width of its container.
	*
	* @param parent the parent control
	*/
	protected void createSpacer(Composite parent) {
	Label spacer= new Label(parent, SWT.NONE);
	GridData data= new GridData();
	data.horizontalAlignment= GridData.FILL;
	data.verticalAlignment= GridData.BEGINNING;
	spacer.setLayoutData(data);
	}

	/**
	* Determine if the page is complete and update the page appropriately.
	*/
	protected void updatePageCompletion() {
	boolean pageComplete= isPageComplete();
	setPageComplete(pageComplete);
	if (pageComplete) {
	setErrorMessage(null);
	}
	}

	/**
	* Returns the resource for the specified path.
	*
	* @param path the path for which the resource should be returned
	* @return the resource specified by the path or <code>null</code>
	*/
	protected IResource findResource(IPath path) {
	IWorkspace workspace= JavaPlugin.getWorkspace();
	IStatus result= workspace.validatePath(
	path.toString(),
	IResource.ROOT \| IResource.PROJECT \| IResource.FOLDER \| IResource.FILE);
	if (result.isOK() && workspace.getRoot().exists(path))
	return workspace.getRoot().findMember(path);
	return null;
	}
	}