Java tutorial
/******************************************************************************* * 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: * Atsuhiko Yamanaka, JCraft,Inc. - initial API and implementation. * IBM Corporation - ongoing maintenance *******************************************************************************/ package org.eclipse.jsch.internal.ui; import org.eclipse.jface.dialogs.*; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.window.Window; import org.eclipse.osgi.util.NLS; 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.*; import org.eclipse.ui.PlatformUI; /** * A dialog for keyboard-interactive authentication for the ssh2 connection. */ public class KeyboardInteractiveDialog extends TrayDialog { // widgets private Text[] texts; protected Image keyLockImage; protected Button allowCachingButton; protected Text usernameField; protected String userName; protected String domain; protected String destination; protected String name; protected String instruction; protected String lang; protected String[] prompt; protected boolean[] echo; private String message; private String[] result; protected boolean allowCaching = false; private boolean isPasswordAuth = false; /** * Creates a new KeyboardInteractiveDialog. * * @param parentShell the parent shell * @param location * @param destination * @param name the name * @param userName * @param instruction the instruction * @param prompt the titles for text fields * @param echo '*' should be used or not */ public KeyboardInteractiveDialog(Shell parentShell, String location, String destination, String name, String userName, String instruction, String[] prompt, boolean[] echo) { super(parentShell); this.domain = location; this.destination = destination; this.name = name; this.userName = userName; this.instruction = instruction; this.prompt = prompt; this.echo = echo; if (name != null && name.length() > 0) { this.message = NLS.bind(Messages.KeyboardInteractiveDialog_0, new String[] { destination, name }); } else { this.message = NLS.bind(Messages.KeyboardInteractiveDialog_1, destination); } if (KeyboardInteractiveDialog.isPasswordAuth(prompt)) { isPasswordAuth = true; } } /** * @see Window#configureShell */ protected void configureShell(Shell newShell) { super.configureShell(newShell); if (isPasswordAuth) { newShell.setText(Messages.KeyboardInteractiveDialog_2); } else { newShell.setText(message); } // set F1 help PlatformUI.getWorkbench().getHelpSystem().setHelp(newShell, IHelpContextIds.KEYBOARD_INTERACTIVE_DIALOG); } /** * @see Window#create */ public void create() { super.create(); if (isPasswordAuth && usernameField != null && userName != null) { usernameField.setText(userName); usernameField.setEditable(false); } if (texts.length > 0) { texts[0].setFocus(); } } /** * @see Dialog#createDialogArea */ protected Control createDialogArea(Composite parent) { Composite top = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.numColumns = 2; top.setLayout(layout); top.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); Composite imageComposite = new Composite(top, SWT.NONE); layout = new GridLayout(); imageComposite.setLayout(layout); imageComposite.setLayoutData(new GridData(GridData.FILL_VERTICAL)); Composite main = new Composite(top, SWT.NONE); layout = new GridLayout(); layout.numColumns = 3; main.setLayout(layout); main.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); Label imageLabel = new Label(imageComposite, SWT.NONE); keyLockImage = ImageDescriptor .createFromURL(JSchUIPlugin.getPlugin().getImageUrl(IUIConstants.IMG_KEY_LOCK)).createImage(); imageLabel.setImage(keyLockImage); GridData data = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL); imageLabel.setLayoutData(data); if (message != null) { Label messageLabel = new Label(main, SWT.WRAP); messageLabel.setText(message); data = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL); data.horizontalSpan = 3; data.widthHint = 300; messageLabel.setLayoutData(data); } if (domain != null) { Label d = new Label(main, SWT.WRAP); d.setText(Messages.KeyboardInteractiveDialog_3); data = new GridData(); d.setLayoutData(data); Label label = new Label(main, SWT.WRAP); label.setText(domain); data = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL); data.horizontalSpan = 2; data.widthHint = 300; label.setLayoutData(data); } if (instruction != null && instruction.length() > 0) { Label label = new Label(main, SWT.WRAP); label.setText(instruction); data = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL); data.horizontalSpan = 3; data.widthHint = 300; label.setLayoutData(data); } if (isPasswordAuth) { createUsernameFields(main); } createPasswordFields(main); if (isPasswordAuth & domain != null) { allowCachingButton = new Button(main, SWT.CHECK); allowCachingButton.setText(Messages.KeyboardInteractiveDialog_4); data = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL); data.horizontalSpan = 3; allowCachingButton.setLayoutData(data); allowCachingButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { allowCaching = allowCachingButton.getSelection(); } }); } Dialog.applyDialogFont(parent); return main; } /** * Creates the three widgets that represent the user name entry area. * * @param parent the parent of the widgets */ protected void createUsernameFields(Composite parent) { new Label(parent, SWT.NONE).setText(Messages.KeyboardInteractiveDialog_6); usernameField = new Text(parent, SWT.BORDER); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 2; data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.ENTRY_FIELD_WIDTH); usernameField.setLayoutData(data); } /** * Creates the widgets that represent the entry area. * * @param parent * the parent of the widgets */ protected void createPasswordFields(Composite parent) { texts = new Text[prompt.length]; for (int i = 0; i < prompt.length; i++) { new Label(parent, SWT.NONE).setText(prompt[i]); int flag = SWT.BORDER; if (!echo[i]) { flag |= SWT.PASSWORD; } texts[i] = new Text(parent, flag); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.horizontalSpan = 2; data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.ENTRY_FIELD_WIDTH); texts[i].setLayoutData(data); if (!echo[i]) { texts[i].setEchoChar('*'); } } } /** * Returns the entered values, or null * if the user canceled. * * @return the entered values */ public String[] getResult() { return result; } /** * Returns <code>true</code> if the save password checkbox was selected. * @return <code>true</code> if the save password checkbox was selected and <code>false</code> * otherwise. */ public boolean getAllowCaching() { return allowCaching; } /** * Notifies that the ok button of this dialog has been pressed. * <p> * The default implementation of this framework method sets * this dialog's return code to <code>Window.OK</code> * and closes the dialog. Subclasses may override. * </p> */ protected void okPressed() { result = new String[prompt.length]; for (int i = 0; i < texts.length; i++) { result[i] = texts[i].getText(); } super.okPressed(); } /** * Notifies that the cancel button of this dialog has been pressed. * <p> * The default implementation of this framework method sets * this dialog's return code to <code>Window.CANCEL</code> * and closes the dialog. Subclasses may override. * </p> */ protected void cancelPressed() { result = null; super.cancelPressed(); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#close() */ public boolean close() { if (keyLockImage != null) { keyLockImage.dispose(); } return super.close(); } /** * Guesses if this dialog is used for password authentication. * @param prompt prompts for keyboard-interactive authentication method. * @return <code>true</code> if this dialog is used for password authentication. */ static boolean isPasswordAuth(String[] prompt) { return prompt != null && prompt.length == 1 && prompt[0].trim().equalsIgnoreCase("password:"); //$NON-NLS-1$ } }