org.argeo.cms.ui.workbench/src/org/argeo/cms/ui/workbench/WorkbenchUiPlugin.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.cms.ui.workbench;
  17
  18 import java.io.IOException;
  19 import java.util.ResourceBundle;
  20
  21 import javax.security.auth.callback.Callback;
  22 import javax.security.auth.callback.CallbackHandler;
  23 import javax.security.auth.callback.UnsupportedCallbackException;
  24
  25 import org.apache.commons.logging.Log;
  26 import org.apache.commons.logging.LogFactory;
  27 import org.argeo.cms.CmsException;
  28 import org.argeo.cms.widgets.auth.DefaultLoginDialog;
  29 import org.eclipse.core.runtime.ILogListener;
  30 import org.eclipse.core.runtime.IStatus;
  31 import org.eclipse.core.runtime.Platform;
  32 import org.eclipse.jface.resource.ImageDescriptor;
  33 import org.eclipse.swt.widgets.Display;
  34 import org.eclipse.ui.plugin.AbstractUIPlugin;
  35 import org.osgi.framework.BundleContext;
  36 import org.osgi.framework.ServiceRegistration;
  37
  38 /** The activator class controls the plug-in life cycle */
  39 public class WorkbenchUiPlugin extends AbstractUIPlugin implements ILogListener {
  40         private final static Log log = LogFactory.getLog(WorkbenchUiPlugin.class);
  41
  42         // The plug-in ID
  43         public final static String PLUGIN_ID = "org.argeo.cms.ui.workbench"; //$NON-NLS-1$
  44         public final static String THEME_PLUGIN_ID = "org.argeo.cms.ui.theme"; //$NON-NLS-1$
  45
  46         private ResourceBundle messages;
  47         private static BundleContext bundleContext;
  48
  49         public static InheritableThreadLocal<Display> display = new InheritableThreadLocal<Display>() {
  50
  51                 @Override
  52                 protected Display initialValue() {
  53                         return Display.getCurrent();
  54                 }
  55         };
  56
  57         final static String CONTEXT_KEYRING = "KEYRING";
  58
  59         private CallbackHandler defaultCallbackHandler;
  60         private ServiceRegistration<CallbackHandler> defaultCallbackHandlerReg;
  61
  62         // The shared instance
  63         private static WorkbenchUiPlugin plugin;
  64
  65         public void start(BundleContext context) throws Exception {
  66                 super.start(context);
  67                 bundleContext = context;
  68                 defaultCallbackHandler = new DefaultCallbackHandler();
  69                 defaultCallbackHandlerReg = context.registerService(CallbackHandler.class, defaultCallbackHandler, null);
  70
  71                 plugin = this;
  72                 messages = ResourceBundle.getBundle(PLUGIN_ID + ".messages");
  73                 Platform.addLogListener(this);
  74                 if (log.isTraceEnabled())
  75                         log.trace("Eclipse logging now directed to standard logging");
  76         }
  77
  78         public void stop(BundleContext context) throws Exception {
  79                 bundleContext = null;
  80                 defaultCallbackHandlerReg.unregister();
  81         }
  82
  83         public static BundleContext getBundleContext() {
  84                 return bundleContext;
  85         }
  86
  87         /*
  88          * Returns the shared instance
  89          *
  90          * @return the shared instance
  91          */
  92         public static WorkbenchUiPlugin getDefault() {
  93                 return plugin;
  94         }
  95
  96         protected class DefaultCallbackHandler implements CallbackHandler {
  97                 public void handle(final Callback[] callbacks) throws IOException, UnsupportedCallbackException {
  98
  99                         // if (display != null) // RCP
 100                         Display displayToUse = display.get();
 101                         if (displayToUse == null)// RCP
 102                                 displayToUse = Display.getDefault();
 103                         displayToUse.syncExec(new Runnable() {
 104                                 public void run() {
 105                                         DefaultLoginDialog dialog = new DefaultLoginDialog(display.get().getActiveShell());
 106                                         try {
 107                                                 dialog.handle(callbacks);
 108                                         } catch (IOException e) {
 109                                                 throw new CmsException("Cannot open dialog", e);
 110                                         }
 111                                 }
 112                         });
 113                         // else {// RAP
 114                         // DefaultLoginDialog dialog = new DefaultLoginDialog();
 115                         // dialog.handle(callbacks);
 116                         // }
 117                 }
 118
 119         }
 120
 121         public static ImageDescriptor getImageDescriptor(String path) {
 122                 return imageDescriptorFromPlugin(THEME_PLUGIN_ID, path);
 123         }
 124
 125         /** Returns the internationalized label for the given key */
 126         public static String getMessage(String key) {
 127                 try {
 128                         return getDefault().messages.getString(key);
 129                 } catch (NullPointerException npe) {
 130                         log.warn(key + " not found.");
 131                         return key;
 132                 }
 133         }
 134
 135         /**
 136          * Gives access to the internationalization message bundle. Returns null in case
 137          * this UiPlugin is not started (for JUnit tests, by instance)
 138          */
 139         public static ResourceBundle getMessagesBundle() {
 140                 if (getDefault() != null)
 141                         // To avoid NPE
 142                         return getDefault().messages;
 143                 else
 144                         return null;
 145         }
 146
 147         public void logging(IStatus status, String plugin) {
 148                 Log pluginLog = LogFactory.getLog(plugin);
 149                 Integer severity = status.getSeverity();
 150                 if (severity == IStatus.ERROR)
 151                         pluginLog.error(status.getMessage(), status.getException());
 152                 else if (severity == IStatus.WARNING)
 153                         pluginLog.warn(status.getMessage(), status.getException());
 154                 else if (severity == IStatus.INFO)
 155                         pluginLog.info(status.getMessage(), status.getException());
 156                 else if (severity == IStatus.CANCEL)
 157                         if (pluginLog.isDebugEnabled())
 158                                 pluginLog.debug(status.getMessage(), status.getException());
 159         }
 160 }