printmessagethread.java

一个用java写的mail.里面的代码值得我们去研究！学习。

/*
** $Id: PrintMessageThread.java,v 1.5 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.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Image;
import java.awt.Point;
import java.awt.PrintJob;
import java.awt.Toolkit;

import java.util.Date;

import javax.mail.Address;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Part;

import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JProgressBar;

import org.icemail.Package; 

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


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

  private Frame         frame = null;
  private Message[]     msgs = null;

  private PrintJob      job = null;
  private Graphics      pg = null;

  private Font          boldF  = new Font( "Serif", Font.BOLD, 12 );
  private Font          plainF = new Font( "Serif", Font.PLAIN, 12 );
  private Font          titleF = new Font( "SansSerif", Font.BOLD, 12 );

  private FontMetrics   boldFM;
  private FontMetrics   plainFM;
  private FontMetrics   titleFM;

  private int           xPosition;
  private int           yPosition;
  private int           xMargin = 6;
  private int           yMargin = 4;
  private int           lineHeight;

  private Dimension     pageSz;
  private JDialog       dialog;
  private JProgressBar  progress;


  public
  PrintMessageThread( Frame frame, Message[] msgs ) {
    super();

    if ( Package.DEBUG && Package.isTraceable( "PrintMessageThread" ) ) {
      System.out.println( "PrintMessageThread(): " + msgs.length );
    }

    this.msgs = msgs;
    this.frame = frame;
  }

  public void
  run() {
    if ( Package.DEBUG && Package.isTraceable( "PrintMessageThread" ) ) {
      System.out.println( "PrintMessageThread.run()" );
    }

    if ( this.msgs != null && this.msgs.length > 0 ) {
      Toolkit tk = Toolkit.getDefaultToolkit();

      this.job = tk.getPrintJob( this.frame, "ICEMail Job", null );

      if ( this.job != null ) {
        printMessages( this.msgs );

        this.job.end();
      }
    }
  // FIX ME; clean up everything to be sure things are disposed properly
  }

  private void
  printMessages( Message[] msgs ) {
    if ( Package.DEBUG && Package.isTraceable( "PrintMessageThread" ) ) {
      System.out.println( "PrintMessageThread.printMessages(m[]): " + msgs.length );
    }

    this.dialog = new JDialog( this.frame, false );
    this.dialog.setTitle( ICEMail.getBundle().getString( "PrintMessage.Title" ) );

    Container content = this.dialog.getContentPane();
    content.setLayout( new GridBagLayout() );

    JLabel lbl;
    lbl = ComponentFactory.getLabel( ICEMail.getBundle(), "PrintMessage.Printing" );
    lbl.setHorizontalAlignment( JLabel.CENTER );
    AWTUtilities.constrain( content, lbl, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.CENTER, 0, 0, 0, 1, 1.0, 0.0 );

    this.progress = new JProgressBar();
    this.progress.setValue( 0 );
    this.progress.setMinimum( 0 );
    this.progress.setMaximum( 100 );
    AWTUtilities.constrain( content, this.progress, GridBagConstraints.HORIZONTAL,
                            GridBagConstraints.CENTER, 0, 1, 0, 1, 1.0, 0.0 );

    this.dialog.pack();

    Dimension sz = this.dialog.getSize();
    if ( sz.width < 350 ) {
      sz.width = 350;
      this.dialog.setSize( sz );
    }

    Point loc = AWTUtilities.computeDialogLocation( this.dialog );

    this.dialog.setLocation( loc.x, loc.y );

    this.dialog.show();

    for ( int mIdx = 0 ; mIdx < msgs.length ; ++mIdx ) {
      Message msg = msgs[ mIdx ];

      if ( msg == null )
        continue;

      printMessage( this.job, msg );

      this.progress.setValue( mIdx * 100 / msgs.length );
    }

    this.progress.setValue( 100 );

    try {
      sleep( 750 );
    } catch ( InterruptedException ex ) {
    }

    this.dialog.dispose();
  }

  private void
  printMessage( PrintJob job, Message msg ) {
    if ( Package.DEBUG && Package.isTraceable( "PrintMessageThread" ) ) {
      System.out.println( "PrintMessageThread.printMessage(pj,m)" );
    }

    this.pg = job.getGraphics();


    this.boldFM = pg.getFontMetrics( this.boldF );
    this.plainFM = pg.getFontMetrics( this.plainF );
    this.titleFM = pg.getFontMetrics( this.titleF );

    this.pageSz = job.getPageDimension();

    int res = job.getPageResolution();

    this.pageSz.width -= 36;
    this.pageSz.height -= 72;

    this.lineHeight = 20;

    this.xPosition = xMargin;
    this.yPosition = yMargin + 6 + this.titleFM.getHeight();

    try {
      Address[] adds;

      adds = msg.getFrom();

      printHeaderLine( ICEMail.getBundle().getString( "PrintMessage.From" ), adds );
      this.xPosition = this.xMargin;
      this.yPosition += this.titleFM.getHeight();

      adds = msg.getRecipients( Message.RecipientType.TO );

      printHeaderLine( ICEMail.getBundle().getString( "PrintMessage.To" ), adds );
      this.xPosition = this.xMargin;
      this.yPosition += this.titleFM.getHeight();

      adds = msg.getRecipients( Message.RecipientType.CC );

      if ( adds != null && adds.length > 0 ) {
        printHeaderLine( ICEMail.getBundle().getString( "PrintMessage.Cc" ), adds );
        this.xPosition = this.xMargin;
        this.yPosition += this.titleFM.getHeight();
      }

      adds = msg.getRecipients( Message.RecipientType.BCC );

      if ( adds != null && adds.length > 0 ) {
        printHeaderLine( ICEMail.getBundle().getString( "PrintMessage.Bcc" ), adds );
        this.xPosition = this.xMargin;
        this.yPosition += this.titleFM.getHeight();
      }

      Date date = msg.getSentDate();
      if ( date != null ) {
        String dStr = ICEMail.getDateFormat().format( date );

        printHeaderLine( ICEMail.getBundle().getString( "PrintMessage.Date" ), dStr );
        this.xPosition = this.xMargin;
        this.yPosition += this.titleFM.getHeight();
      }

      String subject = msg.getSubject();
      if ( subject != null ) {
        printHeaderLine( ICEMail.getBundle().getString( "PrintMessage.Subject" ), subject );
        this.xPosition = this.xMargin;
      }

      this.yPosition += this.plainFM.getHeight() / 3;

      this.pg.fillRect( this.xPosition, this.yPosition, (this.pageSz.width - (2 * this.xMargin)),
                                        (this.plainFM.getHeight() / 5) );

      this.yPosition += this.plainFM.getHeight() / 3;

      StringBuffer textbuf = new StringBuffer();

      getMessageText( textbuf, msg );
      
      printBody( textbuf.toString() );
    } catch ( MessagingException ex ) {
      Object[] xargs = new Object[1];
      xargs[0] = ex.getMessage();
      ComponentFactory.showDialog( ICEMail.getBundle(), "PrintMessage.MessageError",
                                   0, JOptionPane.ERROR_MESSAGE, xargs );
    }

    this.pg.dispose();
  }

  private void
  printBody( String bodyText ) {
    if ( Package.DEBUG && Package.isTraceable( "PrintMessageThread" ) ) {
      System.out.println( "PrintMessageThread.printBody(s)" );
    }

    String line = null;
    String text = bodyText;

    this.lineHeight = this.plainFM.getHeight();

    newLine();

    int lineW = this.pageSz.width - ( 2 * this.xMargin );

    this.pg.setFont( this.plainF );

    for ( ; text.length() > 0 ; ) {
      int endi;
      int skip = 1;
      int ni = text.indexOf( "\n" );
      int ri = text.indexOf( "\r" );
      if ( ri != -1 && ni == (ri + 1) ) {
      // CR/NL
        endi = ri;
        skip = 2;
      } else if ( ri == -1 && ni == -1 ) {
        endi = -1;
      } else if ( ri == -1 ) {
        endi = ni;
      } else if ( ni == -1 ) {
        endi = ri;
      } else {
        endi = ( ri < ni ? ri : ni );
      }

      if ( endi == -1 ) {
        line = text;
        text = "";