--- /dev/null
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.cms.widgets.auth;
+
+import java.io.IOException;
+import java.util.Arrays;
+
+import javax.security.auth.callback.Callback;
+import javax.security.auth.callback.CallbackHandler;
+import javax.security.auth.callback.NameCallback;
+import javax.security.auth.callback.PasswordCallback;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.core.runtime.NullProgressMonitor;
+import org.eclipse.jface.dialogs.IDialogConstants;
+import org.eclipse.jface.dialogs.TrayDialog;
+import org.eclipse.jface.operation.IRunnableWithProgress;
+import org.eclipse.jface.operation.ModalContext;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.SelectionListener;
+import org.eclipse.swt.widgets.Button;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Shell;
+import org.osgi.framework.FrameworkUtil;
+
+/** Base for login dialogs */
+public abstract class AbstractLoginDialog extends TrayDialog implements CallbackHandler {
+ private static final long serialVersionUID = -8046708963512717709L;
+
+ private final static Log log = LogFactory.getLog(AbstractLoginDialog.class);
+
+ private Thread modalContextThread = null;
+ boolean processCallbacks = false;
+ boolean isCancelled = false;
+ Callback[] callbackArray;
+
+ protected final Callback[] getCallbacks() {
+ return this.callbackArray;
+ }
+
+ public abstract void internalHandle();
+
+ public boolean isCancelled() {
+ return isCancelled;
+ }
+
+ protected AbstractLoginDialog(Shell parentShell) {
+ super(parentShell);
+ }
+
+ /*
+ * (non-Javadoc)
+ *
+ * @see
+ * javax.security.auth.callback.CallbackHandler#handle(javax.security.auth
+ * .callback.Callback[])
+ */
+ public void handle(final Callback[] callbacks) throws IOException {
+ // clean previous usage
+ if (processCallbacks) {
+ // this handler was already used
+ processCallbacks = false;
+ }
+
+ if (modalContextThread != null) {
+ try {
+ modalContextThread.join(1000);
+ } catch (InterruptedException e) {
+ // silent
+ }
+ modalContextThread = null;
+ }
+
+ // initialize
+ this.callbackArray = callbacks;
+ final Display display = Display.getDefault();
+ display.syncExec(new Runnable() {
+
+ public void run() {
+ isCancelled = false;
+ setBlockOnOpen(false);
+ open();
+
+ final Button okButton = getButton(IDialogConstants.OK_ID);
+ okButton.setText("Login");
+ okButton.addSelectionListener(new SelectionListener() {
+ private static final long serialVersionUID = -200281625679096775L;
+
+ public void widgetSelected(final SelectionEvent event) {
+ processCallbacks = true;
+ }
+
+ public void widgetDefaultSelected(final SelectionEvent event) {
+ // nothing to do
+ }
+ });
+ final Button cancel = getButton(IDialogConstants.CANCEL_ID);
+ cancel.addSelectionListener(new SelectionListener() {
+ private static final long serialVersionUID = -3826030278084915815L;
+
+ public void widgetSelected(final SelectionEvent event) {
+ isCancelled = true;
+ processCallbacks = true;
+ }
+
+ public void widgetDefaultSelected(final SelectionEvent event) {
+ // nothing to do
+ }
+ });
+ }
+ });
+ try {
+ ModalContext.setAllowReadAndDispatch(true); // Works for now.
+ ModalContext.run(new IRunnableWithProgress() {
+
+ public void run(final IProgressMonitor monitor) {
+ modalContextThread = Thread.currentThread();
+ // Wait here until OK or cancel is pressed, then let it rip.
+ // The event
+ // listener
+ // is responsible for closing the dialog (in the
+ // loginSucceeded
+ // event).
+ while (!processCallbacks && (modalContextThread != null)
+ && (modalContextThread == Thread.currentThread())
+ && FrameworkUtil.getBundle(AbstractLoginDialog.class).getBundleContext() != null) {
+ // Note: SecurityUiPlugin.getDefault() != null is false
+ // when the OSGi runtime is shut down
+ try {
+ Thread.sleep(100);
+ // if (display.isDisposed()) {
+ // log.warn("Display is disposed, killing login
+ // dialog thread");
+ // throw new ThreadDeath();
+ // }
+ } catch (final Exception e) {
+ // do nothing
+ }
+ }
+ processCallbacks = false;
+ // Call the adapter to handle the callbacks
+ if (!isCancelled())
+ internalHandle();
+ else
+ // clear callbacks are when cancelling
+ for (Callback callback : callbacks)
+ if (callback instanceof PasswordCallback) {
+ char[] arr = ((PasswordCallback) callback).getPassword();
+ if (arr != null) {
+ Arrays.fill(arr, '*');
+ ((PasswordCallback) callback).setPassword(null);
+ }
+ } else if (callback instanceof NameCallback)
+ ((NameCallback) callback).setName(null);
+ }
+ }, true, new NullProgressMonitor(), Display.getDefault());
+ } catch (ThreadDeath e) {
+ isCancelled = true;
+ log.debug("Thread " + Thread.currentThread().getId() + " died");
+ throw e;
+ } catch (Exception e) {
+ isCancelled = true;
+ IOException ioe = new IOException("Unexpected issue in login dialog, see root cause for more details");
+ ioe.initCause(e);
+ throw ioe;
+ } finally {
+ // so that the modal thread dies
+ processCallbacks = true;
+ // try {
+ // // wait for the modal context thread to gracefully exit
+ // modalContextThread.join();
+ // } catch (InterruptedException ie) {
+ // // silent
+ // }
+ modalContextThread = null;
+ }
+ }
+
+ protected void configureShell(Shell shell) {
+ super.configureShell(shell);
+ shell.setText("Authentication");
+ }
+}
projects / lgpl / argeo-commons.git / blobdiff