messagepanel.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: MessagePanel.java,v 1.9 2001/05/07 12:37:22 kunugi Exp $
**
** Copyright (c) 2000-2001 Jeff Gay
** on behalf of ICEMail.org <http://www.icemail.org>
** Copyright (c) 1998-2000 by Timothy Gerard Endres
** 
** This program is free software.
** 
** You may redistribute it and/or modify it under the terms of the GNU
** General Public License as published by the Free Software Foundation.
** Version 2 of the license should be included with this distribution in
** the file LICENSE, as well as License.html. If the license is not
** included with this distribution, you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org', or you may write to the
** Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
*/

package org.icemail.mail;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.Frame;
import java.awt.Rectangle;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import java.io.File;
import java.io.FileOutputStream;

import java.text.DateFormat;
import java.text.SimpleDateFormat;

import java.util.Date;
import java.util.Enumeration;
import java.util.Vector;

import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;

import javax.mail.internet.MimeMessage;

import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTable;
import javax.swing.JToolBar;
import javax.swing.JViewport;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.SwingConstants;

import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

import org.icemail.Package; 

import org.icemail.util.AWTUtilities; 
import org.icemail.util.ComponentFactory; 
import org.icemail.util.UserProperties;


/**
 * Class MessagePanel
 */
public class MessagePanel
  extends JPanel
  implements ActionDistributor
{
  static private final int Debug_ = Package.DEBUG ? Package.getLevel( "MessagePanel" ) : 0;

  static private Color     NewMsgColor_ = Color.red;
  static private Color     OldMsgColor_ = Color.black;

  /**
   * This is the index of the currently displayed message.
   * This prevents us from re-displaying the current message
   * which wastes bandwidth.
   */
  private int               currentIndex_ = -1;

  private QuickViewer       viewer_ = new QuickViewer();

  private JTable            messageTable_ = null;
  private JScrollPane       msgScroller = null;
  private JScrollPane       tblScroller = null;
  private StatusBar         statusBar_;
  private JSplitPane        splitPane = null;

  private FolderTableModel  model_ = null;
  private Folder            folder_ = null;

  private String[]          colFields_;
  private int[]             colWidths_;

  private IActionListener   listener_ = new IActionListener();


  public
  MessagePanel( StatusBar statusbar ) {
    super();
    
    statusBar_ = statusbar;

    loadTableColumns();

    establishContents();
  }

  public void
  loadLayoutProperties() {
    int loc = Configuration.getDividerLocation( Configuration.P_MSG_PANEL_DIVIDER, 75 );

    this.splitPane.setDividerLocation( loc );

    viewer_.loadLayoutProperties();
  }

  public void
  saveLayoutProperties() {
    saveTableColumns();

    Configuration.saveDividerLocation( Configuration.P_MSG_PANEL_DIVIDER,
                                       this.splitPane.getDividerLocation() );

    viewer_.saveLayoutProperties();
  }

  public Action
  getSignedAction() {
    return viewer_.getSignedAction();
  }

  public Action
  getEnvelopedAction() {
    return viewer_.getEnvelopedAction();
  }

  public void
  setFolder( Folder folder ) {
    if ( folder_ == folder ) {
      return;
    }
    
    try {
    // close the previous folder if necessary
      if ( folder_ != null ) {
        MailUtilities.setStoreConnected( folder_.getStore() );

        synchronized ( folder_ ) {
          if ( folder_.isOpen() ) {
            folder_.close( false );
          }
        }
      }

      folder_ = folder;
      currentIndex_ = -1;

      if ( folder_ == null ) {
        model_.setFolder( folder_ );
        viewer_.setMessage( null );
        messageTable_.getSelectionModel().clearSelection();

        statusBar_.showStatusMessage( "" );
        statusBar_.setCurrentMessageNum( 0 );
        statusBar_.setNumFolderMessages( 0 );
        statusBar_.setCurrentFolderName( "" );
      } else {
        MailUtilities.setFolderOpenAndReady( folder_, Folder.READ_WRITE );

        model_.setFolder( folder_ );

        messageTable_.getSelectionModel().clearSelection();

        viewer_.setMessage( null );

        Object[] xargs = new Object[1];
        xargs[0] = folder_.getName();
        statusBar_.showStatusMessage(
            ICEMail.getBundle().getFormatString( "MessagePanel.FolderOpen", xargs ) );

        statusBar_.setCurrentMessageNum( 1 );
        statusBar_.setNumFolderMessages( folder_.getMessageCount() );
        statusBar_.setCurrentFolderName( folder_.getName() );

        showTableRow( 0 );
        if ( messageTable_.getRowCount() > 0 ) {
          messageTable_.setRowSelectionInterval( 0, 0 );
        }
      }
    } catch ( MessagingException ex ) {
      folder_ = null;

      //ex.printStackTrace( System.err );

      //statusBar_.showStatusMessage
      //  ( "Error opening folder '" + folder_.getName() + "', "
      //    + ex.getMessage() );

      Object[] xargs = new Object[2];
      xargs[0] = folder_.getName();
      xargs[1] = ex.getMessage();
      ComponentFactory.showDialog( ICEMail.getBundle(), "MessagePanel.OpenError",
                                   0, JOptionPane.ERROR_MESSAGE, xargs );
    }
  }

  /**
   * Distribute events from other sources to action listeners and distributors.
   * <p>
   * Implements ActionDistributor.distribute()
   *
   * @param event the event to distribute
   */
  public void
  distribute( ActionEvent event ) {
    if ( Package.DEBUG && Package.isTraceable( "MessagePanel" ) ) {
      System.out.println( "MessagePanel.distribute(ae): " + event );
    }
    listener_.actionPerformed( event );
  }

//............................................................

  private void
  expungeDeletedMessages() {
    if ( folder_ == null )
      return;

    Object[] xargs = new Object[1];
    xargs[0] = folder_.getName();

    String msg = ICEMail.getBundle().getFormatString( "MessagePanel.Expunging", xargs );

    String title = ICEMail.getBundle().getString( "MessagePanel.Expunging.title" );

    DialogRunner runner = new DialogRunner( new IExpungeRunner( folder_ ),
                                            (Frame)getTopLevelAncestor(), title, msg );

    runner.start();
  }

  private void
  showTableRow( int row ) {
    Dimension sz = messageTable_.getSize();
    Dimension is = messageTable_.getIntercellSpacing();

    JViewport port = (JViewport) messageTable_.getParent();
    Rectangle portRect = port.getViewRect();

    int height = messageTable_.getScrollableUnitIncrement( portRect,
                                                           SwingConstants.VERTICAL, 1 );

    int top = height * row;

    Rectangle aRect = new Rectangle( 0, top, sz.width, height );

    messageTable_.scrollRectToVisible( aRect );
  }

  private void
  deleteSelectedMessages() {
    if ( folder_ == null )
      return;
    
    synchronized( model_ ) {
      MainFrame.getInstance().setWaitCursor();

      ListSelectionModel selModel = messageTable_.getSelectionModel();

      int iMin = selModel.getMinSelectionIndex();
      int iMax = selModel.getMaxSelectionIndex();

      int[] rows = messageTable_.getSelectedRows();

      if ( rows.length < 1 )
        return;

      Message[] msgs = new Message[ rows.length ];
      for ( int idx = 0 ; idx < rows.length ; ++idx ) {
        msgs[ idx ] = model_.getMessage( rows[ idx ] );
      }

      try {
        MailUtilities.setFolderOpenAndReady( folder_, Folder.READ_WRITE );

        for ( int fi = 0 ; fi < msgs.length ; ++fi ) {
          msgs[fi].setFlag( Flags.Flag.DELETED, ! msgs[fi].isSet( Flags.Flag.DELETED ) );
        }

        model_.flushCache( rows );
        model_.fireRowsUpdated( rows );
      } catch ( MessagingException ex ) {
        Object[] xargs = new Object[1];
        xargs[0] = ex.getMessage();
        ComponentFactory.showDialog( ICEMail.getBundle(), "MessagePanel.MarkingError",
                                     0, JOptionPane.ERROR_MESSAGE, xargs );
      }

      MainFrame.getInstance().resetCursor();

      if ( rows.length == 1 ) {
        int newSelRow = rows[0] + 1;
        int numRows = messageTable_.getRowCount();

        if ( newSelRow >= numRows )
          newSelRow = numRows - 1;

        messageTable_.setRowSelectionInterval( newSelRow, newSelRow );
        
        showTableRow( newSelRow );
      }
    }
  }

  private void
  moveSelectedMessage( int incr ) {
    if ( incr == 0 )
      return;

    synchronized( model_ ) {
      MainFrame.getInstance().setWaitCursor();

      ListSelectionModel selModel = messageTable_.getSelectionModel();

      int[] rows = null;
      int   newSelRow = -1;
      int   numRows = messageTable_.getRowCount();

      if ( numRows == 0 ) {
        newSelRow = -1;
      } else if ( numRows == 1 ) {
        newSelRow = 0;
      } else {
        rows = messageTable_.getSelectedRows();

        if ( rows.length < 1 ) {
          newSelRow = 0;
        } else if ( incr < 0 ) {
          newSelRow = rows[0] + incr;
        } else {
          newSelRow = rows[ rows.length-1 ] + incr;
        }

        if ( newSelRow >= numRows ) {
          newSelRow = numRows - 1;
        } else if ( newSelRow < 0 ) {
          newSelRow = 0;
        }
      }