dev/core/src/com/google/gwt/dev/ModuleTabPanel.java - gwt - Git at Google

 /*
  * Copyright 2009 Google Inc.
  *
  * 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 com.google.gwt.dev;

 import com.google.gwt.core.ext.TreeLogger.Type;
 import com.google.gwt.dev.SwingUI.TabPanelCollection;
 import com.google.gwt.dev.shell.WrapLayout;
 import com.google.gwt.dev.util.BrowserInfo;

 import java.awt.BorderLayout;
 import java.awt.CardLayout;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Font;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.io.File;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.text.DateFormat;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.IdentityHashMap;
 import java.util.List;
 import java.util.Map;

 import javax.swing.ImageIcon;
 import javax.swing.JComboBox;
 import javax.swing.JLabel;
 import javax.swing.JList;
 import javax.swing.JPanel;
 import javax.swing.plaf.basic.BasicComboBoxRenderer;

 /**
  * A panel which contains all modules in one browser tab.
  */
 public class ModuleTabPanel extends JPanel {

   /**
    * A session has a unique session key within a module tab panel, and is
    * identified to the user by the timestamp it was first seen.
    *
    * <p>Within a session, there will be one or more modules, each with their
    * own ModulePanel.
    */
   public class Session {

     private final long createTimestamp;

     /**
      * Map from display names in the dropdown box to module panels.
      */
     private final Map<String, ModulePanel> displayNameToModule;

     private final IdentityHashMap<ModulePanel, SessionModule> moduleSessionMap;

     private SessionModule lastSelectedModule;

     /**
      * Map of module names to the number of times that module has been seen.
      */
     private final Map<String, Integer> moduleCounts;

     /**
      * List, in display order, of entries in the module dropdown box.
      */
     private final List<SessionModule> modules;

     private final String sessionKey;

     public Session(String sessionKey) {
       this.sessionKey = sessionKey;
       createTimestamp = System.currentTimeMillis();
       displayNameToModule = new HashMap<String, ModulePanel>();
       moduleSessionMap = new IdentityHashMap<ModulePanel, SessionModule>();
       modules = new ArrayList<SessionModule>();
       moduleCounts = new HashMap<String, Integer>();
     }

     public synchronized void addModule(String moduleName,
         ModulePanel panel) {
       Integer moduleCount = moduleCounts.get(moduleName);
       if (moduleCount == null) {
         moduleCount = 0;
       }
       moduleCounts.put(moduleName, moduleCount + 1);
       String shortModuleName = getShortModuleName(moduleName);
       if (moduleCount > 0) {
         shortModuleName += " (" + moduleCount + ")";
       }
       SessionModule sessionModule = SessionModule.create(sessionKey,
           panel, shortModuleName);
       modules.add(sessionModule);
       displayNameToModule.put(shortModuleName, panel);
       moduleSessionMap.put(panel, sessionModule);
       // add this item with the key we will use with cardLayout later
       deckPanel.add(panel, sessionModule.getStringKey());
       if (this == currentSession) {
         moduleDropdown.addItem(sessionModule);
         if (moduleDropdown.getItemCount() > 1) {
           moduleDropdownPanel.setEnabled(true);
           moduleDropdownPanel.setVisible(true);
         }
         selectModule(sessionModule);
       }
     }

     public void buildModuleDropdownContents() {
       if (this == currentSession) {
         moduleDropdown.removeAllItems();
         SessionModule firstModule = null;
         for (SessionModule sessionModule : modules) {
          moduleDropdown.addItem(sessionModule);
           if (firstModule == null) {
             firstModule = sessionModule;
           }
         }
         if (moduleDropdown.getItemCount() > 1) {
           moduleDropdownPanel.setEnabled(true);
           moduleDropdownPanel.setVisible(true);
         } else {
           moduleDropdownPanel.setEnabled(false);
           moduleDropdownPanel.setVisible(false);
         }
         if (lastSelectedModule != null) {
           selectModule(lastSelectedModule);
         } else if (firstModule != null) {
           selectModule(firstModule);
         }
       }
     }

     public void disconnectModule(ModulePanel modulePanel) {
       /*
        * TODO(jat): for now, only disconnected modules can be closed.  When
        *     SWT is ripped out and we can pass OOPHM-specific classes through
        *     BrowseWidgetHost.createModuleSpaceHost, we will need to be able
        *     to shutdown the connection from here if it is not already
        *     disconnected.
        */
       SessionModule sessionModule = moduleSessionMap.get(modulePanel);
       moduleSessionMap.remove(modulePanel);
       deckPanel.remove(modulePanel);
       modules.remove(sessionModule);
       switch (modules.size()) {
         case 0: // we just closed the last module in this session
           closeSession(this);
           break;
         case 1: // only one module left, hide dropdown
           moduleDropdownPanel.setEnabled(false);
           moduleDropdownPanel.setVisible(false);
           break;
         default:
           if (lastSelectedModule == sessionModule) {
             // if we closed the active module, switch to the most recent remaining
             lastSelectedModule = modules.get(modules.size() - 1);
           }
           buildModuleDropdownContents();
           break;
       }
     }

     public Collection<String> getActiveModules() {
       ArrayList<String> activeModules = new ArrayList<String>();
       for (SessionModule sessionModule : modules) {
         String displayName = sessionModule.toString();
         Disconnectable module = sessionModule.getModulePanel();
         if (!module.isDisconnected()) {
           activeModules.add(displayName);
         }
       }
       return Collections.unmodifiableList(activeModules);
     }

     public String getDisplayName() {
       return DateFormat.getDateTimeInstance().format(new Date(createTimestamp));
     }

     public String getSessionKey() {
       return sessionKey;
     }

     public boolean hasActiveModules() {
       for (SessionModule sessionModule : modules) {
         Disconnectable module = sessionModule.getModulePanel();
         if (!module.isDisconnected()) {
           return true;
         }
       }
       return false;
     }

     @Override
     public String toString() {
       return getDisplayName();
     }

     private String getShortModuleName(String moduleName) {
       int idx = moduleName.lastIndexOf('.');
       if (idx < 0) {
         return moduleName;
       } else {
         return moduleName.substring(idx + 1);
       }
     }

     private void selectModule(SessionModule sessionModule) {
       cardLayout.show(deckPanel, sessionModule.getStringKey());
       lastSelectedModule = sessionModule;
       moduleDropdown.setSelectedItem(sessionModule);
     }
   }

   /**
    * Renderer used to show entries in the module dropdown box.
    */
   private static class SessionModuleRenderer extends BasicComboBoxRenderer {

     @Override
     public Component getListCellRendererComponent(JList list, Object value,
         int index, boolean isSelected, boolean cellHasFocus) {
       // the superclass just returns this, so we don't save the result and
       // cast it back to a label
       super.getListCellRendererComponent(list, value, index,
           isSelected, cellHasFocus);
       if (value instanceof SessionModule) {
         SessionModule sessionModule = (SessionModule) value;
         if (sessionModule.getModulePanel().isDisconnected()) {
           setForeground(DISCONNECTED_DROPDOWN_COLOR);
           setFont(getFont().deriveFont(Font.ITALIC));
         }
         // TODO(jat): set font to bold/etc if the window has new messages
       }
       return this;
     }
   }

   /**
    * Renderer used to show entries in the session dropdown box.
    */
   private static class SessionRenderer extends BasicComboBoxRenderer {

     @Override
     public Component getListCellRendererComponent(JList list, Object value,
         int index, boolean isSelected, boolean cellHasFocus) {
       // the superclass just returns this, so we don't save the result and
       // cast it back to a label
       super.getListCellRendererComponent(list, value, index,
           isSelected, cellHasFocus);
       if (value instanceof Session) {
         Session session = (Session) value;
         if (!session.hasActiveModules()) {
           setForeground(DISCONNECTED_DROPDOWN_COLOR);
           setFont(getFont().deriveFont(Font.ITALIC));
         }
         // TODO(jat): set font to bold/etc if new modules were added
       }
       return this;
     }
   }

   public static final Color DISCONNECTED_DROPDOWN_COLOR = Color.decode("0x808080");

   private CardLayout cardLayout;

   private Session currentSession;

   private JPanel deckPanel;

   private JComboBox moduleDropdown;

   private JComboBox sessionDropdown;

   private final Map<String, Session> sessions = new HashMap<String, Session>();

   private final TabPanelCollection tabPanelCollection;

   private JPanel topPanel;

   private JPanel sessionDropdownPanel;

   private JPanel moduleDropdownPanel;

   /**
    * Create a panel which will be a top-level tab in the OOPHM UI.  Each of
    * these tabs will contain one or more sessions, and within that one or
    * more module instances.
    *
    * @param userAgent
    * @param remoteSocket
    * @param url
    * @param agentIconBytes
    * @param tabPanelCollection
    * @param moduleName used just for the tab name in the event that the plugin
    *     is an older version that doesn't supply the url
    */
   public ModuleTabPanel(String userAgent, String remoteSocket, String url,
       byte[] agentIconBytes, TabPanelCollection tabPanelCollection,
       String moduleName) {
     super(new BorderLayout());
     this.tabPanelCollection = tabPanelCollection;
     topPanel = new JPanel();
     sessionDropdownPanel = new JPanel(new WrapLayout());
     sessionDropdownPanel.add(new JLabel("Session: "));
     sessionDropdown = new JComboBox();
     sessionDropdown.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) {
         Session session = (Session) sessionDropdown.getSelectedItem();
         selectSession(session);
       }

     });
     sessionDropdown.setRenderer(new SessionRenderer());
     sessionDropdownPanel.add(sessionDropdown);
     sessionDropdownPanel.setEnabled(false);
     sessionDropdownPanel.setVisible(false);
     topPanel.add(sessionDropdownPanel);
     moduleDropdownPanel = new JPanel(new WrapLayout());
     moduleDropdownPanel.add(new JLabel("Module: "));
     moduleDropdown = new JComboBox();
     moduleDropdown.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) {
         SessionModule sessionModule = (SessionModule)
             moduleDropdown.getSelectedItem();
         if (sessionModule != null) {
           // may be null when removeAllItems is called
           currentSession.selectModule(sessionModule);
         }
       }
     });
     moduleDropdown.setRenderer(new SessionModuleRenderer());
     moduleDropdownPanel.add(moduleDropdown);
     moduleDropdownPanel.setEnabled(false);
     moduleDropdownPanel.setVisible(false);
     topPanel.add(moduleDropdownPanel);
     add(topPanel, BorderLayout.NORTH);
     cardLayout = new CardLayout();
     deckPanel = new JPanel(cardLayout);
     add(deckPanel);

     // Construct the tab title and tooltip
     String tabTitle = url;
     if (tabTitle == null) {
       int idx = moduleName.lastIndexOf('.');
       tabTitle = moduleName.substring(idx + 1);
       url = "";
     } else {
       try {
         URL parsedUrl = new URL(url);
         tabTitle = getTabTitle(parsedUrl);
         // rebuild the URL omitting query params and the hash
         StringBuilder buf = new StringBuilder();
         buf.append(parsedUrl.getProtocol()).append(':');
         if (parsedUrl.getAuthority() != null
             && parsedUrl.getAuthority().length() > 0) {
           buf.append("//").append(parsedUrl.getAuthority());
         }
         if (parsedUrl.getPath() != null) {
           buf.append(parsedUrl.getPath());
         }
         buf.append(' '); // space for tooltip below
         url = buf.toString();
       } catch (MalformedURLException e1) {
         // Ignore and just use the full URL
       }
     }

     ImageIcon browserIcon = null;
     if (agentIconBytes != null) {
       browserIcon = new ImageIcon(agentIconBytes);
     }
     String shortName = BrowserInfo.getShortName(userAgent);
     if (browserIcon == null) {
       if (shortName != null) {
         tabTitle += " (" + shortName + ")";
       }
     }
     tabPanelCollection.addTab(this, browserIcon, tabTitle, url + "from "
         + remoteSocket + " on " + userAgent);
   }

   public synchronized ModulePanel addModuleSession(Type maxLevel,
       String moduleName,
       String sessionKey,
       File logFile) {
     Session session = findOrCreateSession(sessionKey);

     ModulePanel panel = new ModulePanel(maxLevel, moduleName, session, logFile);
     return panel;
   }

   private synchronized void addSession(Session session) {
     sessionDropdown.addItem(session);
     sessionDropdown.setSelectedItem(session);
     if (sessionDropdown.getItemCount() > 1) {
       sessionDropdownPanel.setEnabled(true);
       sessionDropdownPanel.setVisible(true);
     }
     selectSession(session);
   }

   private synchronized void closeSession(Session session) {
     sessionDropdown.removeItem(session);
     sessions.remove(session.getSessionKey());
     switch (sessionDropdown.getItemCount()) {
       case 0: // last session closed, close tab
         tabPanelCollection.removeTab(this);
         return;
       case 1: // one session left, remove dropdown
         sessionDropdownPanel.setEnabled(false);
         sessionDropdownPanel.setVisible(false);
         break;
       default: // more than 1 left, do nothing
         break;
     }
     if (session == currentSession) {
       selectSession((Session) sessionDropdown.getItemAt(
           sessionDropdown.getItemCount() - 1));
     }
   }

   /**
    * Return the proper Session object for this session, creating it if needed.
    *
    * @param sessionKey unique key for this session
    * @return Session instance
    */
   private synchronized Session findOrCreateSession(String sessionKey) {
     Session session = sessions.get(sessionKey);
     if (session == null) {
       session = new Session(sessionKey);
       sessions.put(sessionKey, session);
       addSession(session);
     }
     return session;
   }

   private String getTabTitle(URL parsedUrl) {
     String tabTitle = parsedUrl.getPath();
     if (tabTitle.length() > 0) {
       int startIdx = tabTitle.lastIndexOf('/');
       int lastIdx = tabTitle.length();
       if (tabTitle.endsWith(".html")) {
         lastIdx -= 5;
       } else if (tabTitle.endsWith(".htm")) {
         lastIdx -= 4;
       }
       tabTitle = tabTitle.substring(startIdx + 1, lastIdx);
     } else {
       tabTitle = "/";
     }
     return tabTitle;
   }

   private void selectSession(Session session) {
     currentSession = session;
     if (session != null) {
       // can be null when last session removed
       session.buildModuleDropdownContents();
     }
   }
 }
	/*
	* Copyright 2009 Google Inc.
	*
	* 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 com.google.gwt.dev;

	import com.google.gwt.core.ext.TreeLogger.Type;
	import com.google.gwt.dev.SwingUI.TabPanelCollection;
	import com.google.gwt.dev.shell.WrapLayout;
	import com.google.gwt.dev.util.BrowserInfo;

	import java.awt.BorderLayout;
	import java.awt.CardLayout;
	import java.awt.Color;
	import java.awt.Component;
	import java.awt.Font;
	import java.awt.event.ActionEvent;
	import java.awt.event.ActionListener;
	import java.io.File;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.text.DateFormat;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.Date;
	import java.util.HashMap;
	import java.util.IdentityHashMap;
	import java.util.List;
	import java.util.Map;

	import javax.swing.ImageIcon;
	import javax.swing.JComboBox;
	import javax.swing.JLabel;
	import javax.swing.JList;
	import javax.swing.JPanel;
	import javax.swing.plaf.basic.BasicComboBoxRenderer;

	/**
	* A panel which contains all modules in one browser tab.
	*/
	public class ModuleTabPanel extends JPanel {

	/**
	* A session has a unique session key within a module tab panel, and is
	* identified to the user by the timestamp it was first seen.
	*
	* <p>Within a session, there will be one or more modules, each with their
	* own ModulePanel.
	*/
	public class Session {

	private final long createTimestamp;

	/**
	* Map from display names in the dropdown box to module panels.
	*/
	private final Map<String, ModulePanel> displayNameToModule;

	private final IdentityHashMap<ModulePanel, SessionModule> moduleSessionMap;

	private SessionModule lastSelectedModule;

	/**
	* Map of module names to the number of times that module has been seen.
	*/
	private final Map<String, Integer> moduleCounts;

	/**
	* List, in display order, of entries in the module dropdown box.
	*/
	private final List<SessionModule> modules;

	private final String sessionKey;

	public Session(String sessionKey) {
	this.sessionKey = sessionKey;
	createTimestamp = System.currentTimeMillis();
	displayNameToModule = new HashMap<String, ModulePanel>();
	moduleSessionMap = new IdentityHashMap<ModulePanel, SessionModule>();
	modules = new ArrayList<SessionModule>();
	moduleCounts = new HashMap<String, Integer>();
	}

	public synchronized void addModule(String moduleName,
	ModulePanel panel) {
	Integer moduleCount = moduleCounts.get(moduleName);
	if (moduleCount == null) {
	moduleCount = 0;
	}
	moduleCounts.put(moduleName, moduleCount + 1);
	String shortModuleName = getShortModuleName(moduleName);
	if (moduleCount > 0) {
	shortModuleName += " (" + moduleCount + ")";
	}
	SessionModule sessionModule = SessionModule.create(sessionKey,
	panel, shortModuleName);
	modules.add(sessionModule);
	displayNameToModule.put(shortModuleName, panel);
	moduleSessionMap.put(panel, sessionModule);
	// add this item with the key we will use with cardLayout later
	deckPanel.add(panel, sessionModule.getStringKey());
	if (this == currentSession) {
	moduleDropdown.addItem(sessionModule);
	if (moduleDropdown.getItemCount() > 1) {
	moduleDropdownPanel.setEnabled(true);
	moduleDropdownPanel.setVisible(true);
	}
	selectModule(sessionModule);
	}
	}

	public void buildModuleDropdownContents() {
	if (this == currentSession) {
	moduleDropdown.removeAllItems();
	SessionModule firstModule = null;
	for (SessionModule sessionModule : modules) {
	moduleDropdown.addItem(sessionModule);
	if (firstModule == null) {
	firstModule = sessionModule;
	}
	}
	if (moduleDropdown.getItemCount() > 1) {
	moduleDropdownPanel.setEnabled(true);
	moduleDropdownPanel.setVisible(true);
	} else {
	moduleDropdownPanel.setEnabled(false);
	moduleDropdownPanel.setVisible(false);
	}
	if (lastSelectedModule != null) {
	selectModule(lastSelectedModule);
	} else if (firstModule != null) {
	selectModule(firstModule);
	}
	}
	}

	public void disconnectModule(ModulePanel modulePanel) {
	/*
	* TODO(jat): for now, only disconnected modules can be closed. When
	* SWT is ripped out and we can pass OOPHM-specific classes through
	* BrowseWidgetHost.createModuleSpaceHost, we will need to be able
	* to shutdown the connection from here if it is not already
	* disconnected.
	*/
	SessionModule sessionModule = moduleSessionMap.get(modulePanel);
	moduleSessionMap.remove(modulePanel);
	deckPanel.remove(modulePanel);
	modules.remove(sessionModule);
	switch (modules.size()) {
	case 0: // we just closed the last module in this session
	closeSession(this);
	break;
	case 1: // only one module left, hide dropdown
	moduleDropdownPanel.setEnabled(false);
	moduleDropdownPanel.setVisible(false);
	break;
	default:
	if (lastSelectedModule == sessionModule) {
	// if we closed the active module, switch to the most recent remaining
	lastSelectedModule = modules.get(modules.size() - 1);
	}
	buildModuleDropdownContents();
	break;
	}
	}

	public Collection<String> getActiveModules() {
	ArrayList<String> activeModules = new ArrayList<String>();
	for (SessionModule sessionModule : modules) {
	String displayName = sessionModule.toString();
	Disconnectable module = sessionModule.getModulePanel();
	if (!module.isDisconnected()) {
	activeModules.add(displayName);
	}
	}
	return Collections.unmodifiableList(activeModules);
	}

	public String getDisplayName() {
	return DateFormat.getDateTimeInstance().format(new Date(createTimestamp));
	}

	public String getSessionKey() {
	return sessionKey;
	}

	public boolean hasActiveModules() {
	for (SessionModule sessionModule : modules) {
	Disconnectable module = sessionModule.getModulePanel();
	if (!module.isDisconnected()) {
	return true;
	}
	}
	return false;
	}

	@Override
	public String toString() {
	return getDisplayName();
	}

	private String getShortModuleName(String moduleName) {
	int idx = moduleName.lastIndexOf('.');
	if (idx < 0) {
	return moduleName;
	} else {
	return moduleName.substring(idx + 1);
	}
	}

	private void selectModule(SessionModule sessionModule) {
	cardLayout.show(deckPanel, sessionModule.getStringKey());
	lastSelectedModule = sessionModule;
	moduleDropdown.setSelectedItem(sessionModule);
	}
	}

	/**
	* Renderer used to show entries in the module dropdown box.
	*/
	private static class SessionModuleRenderer extends BasicComboBoxRenderer {

	@Override
	public Component getListCellRendererComponent(JList list, Object value,
	int index, boolean isSelected, boolean cellHasFocus) {
	// the superclass just returns this, so we don't save the result and
	// cast it back to a label
	super.getListCellRendererComponent(list, value, index,
	isSelected, cellHasFocus);
	if (value instanceof SessionModule) {
	SessionModule sessionModule = (SessionModule) value;
	if (sessionModule.getModulePanel().isDisconnected()) {
	setForeground(DISCONNECTED_DROPDOWN_COLOR);
	setFont(getFont().deriveFont(Font.ITALIC));
	}
	// TODO(jat): set font to bold/etc if the window has new messages
	}
	return this;
	}
	}

	/**
	* Renderer used to show entries in the session dropdown box.
	*/
	private static class SessionRenderer extends BasicComboBoxRenderer {

	@Override
	public Component getListCellRendererComponent(JList list, Object value,
	int index, boolean isSelected, boolean cellHasFocus) {
	// the superclass just returns this, so we don't save the result and
	// cast it back to a label
	super.getListCellRendererComponent(list, value, index,
	isSelected, cellHasFocus);
	if (value instanceof Session) {
	Session session = (Session) value;
	if (!session.hasActiveModules()) {
	setForeground(DISCONNECTED_DROPDOWN_COLOR);
	setFont(getFont().deriveFont(Font.ITALIC));
	}
	// TODO(jat): set font to bold/etc if new modules were added
	}
	return this;
	}
	}

	public static final Color DISCONNECTED_DROPDOWN_COLOR = Color.decode("0x808080");

	private CardLayout cardLayout;

	private Session currentSession;

	private JPanel deckPanel;

	private JComboBox moduleDropdown;

	private JComboBox sessionDropdown;

	private final Map<String, Session> sessions = new HashMap<String, Session>();

	private final TabPanelCollection tabPanelCollection;

	private JPanel topPanel;

	private JPanel sessionDropdownPanel;

	private JPanel moduleDropdownPanel;

	/**
	* Create a panel which will be a top-level tab in the OOPHM UI. Each of
	* these tabs will contain one or more sessions, and within that one or
	* more module instances.
	*
	* @param userAgent
	* @param remoteSocket
	* @param url
	* @param agentIconBytes
	* @param tabPanelCollection
	* @param moduleName used just for the tab name in the event that the plugin
	* is an older version that doesn't supply the url
	*/
	public ModuleTabPanel(String userAgent, String remoteSocket, String url,
	byte[] agentIconBytes, TabPanelCollection tabPanelCollection,
	String moduleName) {
	super(new BorderLayout());
	this.tabPanelCollection = tabPanelCollection;
	topPanel = new JPanel();
	sessionDropdownPanel = new JPanel(new WrapLayout());
	sessionDropdownPanel.add(new JLabel("Session: "));
	sessionDropdown = new JComboBox();
	sessionDropdown.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent e) {
	Session session = (Session) sessionDropdown.getSelectedItem();
	selectSession(session);
	}

	});
	sessionDropdown.setRenderer(new SessionRenderer());
	sessionDropdownPanel.add(sessionDropdown);
	sessionDropdownPanel.setEnabled(false);
	sessionDropdownPanel.setVisible(false);
	topPanel.add(sessionDropdownPanel);
	moduleDropdownPanel = new JPanel(new WrapLayout());
	moduleDropdownPanel.add(new JLabel("Module: "));
	moduleDropdown = new JComboBox();
	moduleDropdown.addActionListener(new ActionListener() {
	public void actionPerformed(ActionEvent e) {
	SessionModule sessionModule = (SessionModule)
	moduleDropdown.getSelectedItem();
	if (sessionModule != null) {
	// may be null when removeAllItems is called
	currentSession.selectModule(sessionModule);
	}
	}
	});
	moduleDropdown.setRenderer(new SessionModuleRenderer());
	moduleDropdownPanel.add(moduleDropdown);
	moduleDropdownPanel.setEnabled(false);
	moduleDropdownPanel.setVisible(false);
	topPanel.add(moduleDropdownPanel);
	add(topPanel, BorderLayout.NORTH);
	cardLayout = new CardLayout();
	deckPanel = new JPanel(cardLayout);
	add(deckPanel);

	// Construct the tab title and tooltip
	String tabTitle = url;
	if (tabTitle == null) {
	int idx = moduleName.lastIndexOf('.');
	tabTitle = moduleName.substring(idx + 1);
	url = "";
	} else {
	try {
	URL parsedUrl = new URL(url);
	tabTitle = getTabTitle(parsedUrl);
	// rebuild the URL omitting query params and the hash
	StringBuilder buf = new StringBuilder();
	buf.append(parsedUrl.getProtocol()).append(':');
	if (parsedUrl.getAuthority() != null
	&& parsedUrl.getAuthority().length() > 0) {
	buf.append("//").append(parsedUrl.getAuthority());
	}
	if (parsedUrl.getPath() != null) {
	buf.append(parsedUrl.getPath());
	}
	buf.append(' '); // space for tooltip below
	url = buf.toString();
	} catch (MalformedURLException e1) {
	// Ignore and just use the full URL
	}
	}

	ImageIcon browserIcon = null;
	if (agentIconBytes != null) {
	browserIcon = new ImageIcon(agentIconBytes);
	}
	String shortName = BrowserInfo.getShortName(userAgent);
	if (browserIcon == null) {
	if (shortName != null) {
	tabTitle += " (" + shortName + ")";
	}
	}
	tabPanelCollection.addTab(this, browserIcon, tabTitle, url + "from "
	+ remoteSocket + " on " + userAgent);
	}

	public synchronized ModulePanel addModuleSession(Type maxLevel,
	String moduleName,
	String sessionKey,
	File logFile) {
	Session session = findOrCreateSession(sessionKey);

	ModulePanel panel = new ModulePanel(maxLevel, moduleName, session, logFile);
	return panel;
	}

	private synchronized void addSession(Session session) {
	sessionDropdown.addItem(session);
	sessionDropdown.setSelectedItem(session);
	if (sessionDropdown.getItemCount() > 1) {
	sessionDropdownPanel.setEnabled(true);
	sessionDropdownPanel.setVisible(true);
	}
	selectSession(session);
	}

	private synchronized void closeSession(Session session) {
	sessionDropdown.removeItem(session);
	sessions.remove(session.getSessionKey());
	switch (sessionDropdown.getItemCount()) {
	case 0: // last session closed, close tab
	tabPanelCollection.removeTab(this);
	return;
	case 1: // one session left, remove dropdown
	sessionDropdownPanel.setEnabled(false);
	sessionDropdownPanel.setVisible(false);
	break;
	default: // more than 1 left, do nothing
	break;
	}
	if (session == currentSession) {
	selectSession((Session) sessionDropdown.getItemAt(
	sessionDropdown.getItemCount() - 1));
	}
	}

	/**
	* Return the proper Session object for this session, creating it if needed.
	*
	* @param sessionKey unique key for this session
	* @return Session instance
	*/
	private synchronized Session findOrCreateSession(String sessionKey) {
	Session session = sessions.get(sessionKey);
	if (session == null) {
	session = new Session(sessionKey);
	sessions.put(sessionKey, session);
	addSession(session);
	}
	return session;
	}

	private String getTabTitle(URL parsedUrl) {
	String tabTitle = parsedUrl.getPath();
	if (tabTitle.length() > 0) {
	int startIdx = tabTitle.lastIndexOf('/');
	int lastIdx = tabTitle.length();
	if (tabTitle.endsWith(".html")) {
	lastIdx -= 5;
	} else if (tabTitle.endsWith(".htm")) {
	lastIdx -= 4;
	}
	tabTitle = tabTitle.substring(startIdx + 1, lastIdx);
	} else {
	tabTitle = "/";
	}
	return tabTitle;
	}

	private void selectSession(Session session) {
	currentSession = session;
	if (session != null) {
	// can be null when last session removed
	session.buildModuleDropdownContents();
	}
	}
	}