composeframe.java

一个用java写的mail.里面的代码值得我们去研究！学习。

        }
      } else
      if ( option == JOptionPane.CANCEL_OPTION ) {
        xdismiss = false;
      }
    }

    if ( xdismiss ) {
      dismissWindow();
    }
  }

  private void
  dismissWindow() {
    saveLayoutProperties();

    originalMessage_ = null;
    signature_ = null;
    headers_ = null;
    extraHeaders_ = null;
    attachments_ = null;

    if ( attachComboBox_.getItemCount() > 0 ) {
      attachComboBox_.removeAllItems();
    }

    fromText_.setText( "" );
    toText_.setText( "" );
    ccText_.setText( "" );
    bccText_.setText( "" );
    subjectText_.setText( "" );

    messageText_.setText( "" );

  //  reasonable time to clean up memory.
    System.gc();

    javax.swing.SwingUtilities.invokeLater( new IWindowDisposer() );
  }

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

  private void
  loadLayoutProperties() {
    Dimension sz = getSize();

    Rectangle bounds = Configuration.getBounds( "composeWindow",
                                                new Rectangle( 20, 20, sz.width, sz.height ) );
    setBounds( bounds );

    charsetLbl_.setText( Configuration.getCharset() );
  }

  private void
  saveLayoutProperties() {
    Configuration.saveBounds( "composeWindow", getBounds() );
    Configuration.setCharset( charsetLbl_.getText() );
  }

  private Message
  buildHeader( MimeMessage message )
    throws MessagingException {
  // add the addresses
    InternetAddress[] xaddresses;
    String xtext;

    String xcharset = charsetLbl_.getText();

    xtext = fromText_.getText().trim();
    xaddresses = MessageUtilities.encodeAddresses( xtext, xcharset );
    if ( xaddresses.length > 0 )
      message.setFrom( xaddresses[0] );

    xtext = toText_.getText().trim();
    xaddresses = MessageUtilities.encodeAddresses( xtext, xcharset );
    message.addRecipients( Message.RecipientType.TO, xaddresses );

    xtext = ccText_.getText().trim();
    xaddresses = MessageUtilities.encodeAddresses( xtext, xcharset );
    message.addRecipients( Message.RecipientType.CC, xaddresses );

    xtext = bccText_.getText().trim();
    xaddresses = MessageUtilities.encodeAddresses( xtext, xcharset );
    message.addRecipients( Message.RecipientType.BCC, xaddresses );

  // add the subject
    message.setSubject( subjectText_.getText().trim(), xcharset );

  // add the extra headers
    MessageUtilities.addHeaders( message, headers_ );
    MessageUtilities.addHeaders( message, extraHeaders_ );

    return message;
  }

  private MimeMessage
  buildMessage() throws MessagingException {
    MimeMessage xnew = new MimeMessage( ICEMail.getDefaultSession() );
    String xcharset = charsetLbl_.getText();

  // add the content plus any attachments
    String xtext = messageText_.getText();

  // WARNING
  //
  // Remove this translation and SMIME clear signed messages will
  // begin to generate invalid signatures. The problem lies in line
  // termination. The JTextPane likes to give us "\n" terminate lines.
  //
  // However, the mail standards define "\r\n" as the proper line
  // termination sequence. Thus, if we do not convert those "\n"'s
  // to "\r\n", then along the way they will be converted into
  // "\r\n"'s and at that point the signature will become invalid.
  //
  // This is only a problem with "clear signed" messages, since only
  // they can be munged by the intermediate transports.
  //
    try {
      StringBuffer buf = new StringBuffer();
      BufferedReader in = new BufferedReader( new StringReader( xtext ) );

      for ( ; ; ) {
        String inline = in.readLine();
        if ( inline == null )
          break;
        buf.append( inline );
        buf.append( "\r\n" );
      }
      xtext = buf.toString();
    } catch ( IOException ex ) {
      throw new MessagingException( "newline conversion" + ex.getMessage() );
    }

    if ( attachments_.size() > 0 ) {
    // make a multipart message with attachments
      MimeMultipart xmulti = new MimeMultipart();
      if ( xtext != null ) {
        MessageUtilities.attach( xmulti, xtext, xcharset, Part.INLINE );
      }
      MessageUtilities.attach( xmulti, attachments_, xcharset );
      xnew.setContent( xmulti );
    } else {
    // content is simple text
      xnew.setText( xtext, xcharset );
    }

    return xnew;
  }

  private void
  editHeaders() {
    ExtraHeadersDialog dlg = new ExtraHeadersDialog( this, extraHeaders_ );

    dlg.show();

    InternetHeaders xheaders = dlg.getInternetHeaders();
    if ( xheaders.getAllHeaders().hasMoreElements() ) {
      extraHeaders_ = xheaders;
    }
  }

  private void
  pasteAddress( String addrStr ) {
    if ( currentFocus_ != null ) {
      currentFocus_.replaceSelection( addrStr );
    }
  }

// FIXME Move to a utilities class...
  private String
  readFileToString( File f ) {
    String          result = null;

    try {
      StringWriter    out = new StringWriter();
      BufferedReader  in = new BufferedReader( new FileReader( f ) );
      for ( ; ; ) {
        String ln = in.readLine();
        if ( ln == null )
          break;
        out.write( ln );
        out.write( "\n" );
      }
      out.close();
      in.close();

      result = out.toString();
    } catch ( IOException ex ) {
      result = null;
    }

    return result;
  }

  private void
  pasteFile() {
    String title = ICEMail.getBundle().getString( "Compose.title.pastefile" );
    FileDialog dialog = new FileDialog( this, title, FileDialog.LOAD );

    if ( ComposeFrame.LastAttachDir != null )
      dialog.setDirectory( ComposeFrame.LastAttachDir );

    dialog.show();

    String fileName = dialog.getFile();
    String dirName = dialog.getDirectory();
    if ( fileName != null && dirName != null ) {
      ComposeFrame.LastAttachDir = dirName;

      File dirFile = new File( dirName );
      File pasteFile = new File( dirFile, fileName );
      String text = readFileToString( pasteFile );
      if ( text != null ) {
        messageText_.replaceSelection( text );
      }
    }
  }

  private void
  attachItem( Object item, String itemName ) {
    if ( Package.DEBUG && Package.isTraceable( "ComposeFrame" ) ) {
      System.out.println( "ComposeFrame.attachItem(): o-" + item + ", in-[" + itemName + "]" );
    }

    int idx = -1;

    if ( attachments_.size() > 0 )
      idx = attachComboBox_.getSelectedIndex();

    attachments_.insertElementAt( item, idx + 1 );

    attachComboBox_.insertItemAt( itemName, idx + 1 );
    attachComboBox_.setSelectedIndex( idx + 1 );
    attachComboBox_.validate();
    modified_ = true;
  }

  private void
  attachFile() {
    String title = ICEMail.getBundle().getString( "Compose.title.attachfile" );
    FileDialog dialog = new FileDialog( this, title, FileDialog.LOAD );

    if ( ComposeFrame.LastAttachDir != null ) {
      dialog.setDirectory( ComposeFrame.LastAttachDir );
    }

    dialog.show();

    String fileName = dialog.getFile();
    String dirName = dialog.getDirectory();

    if ( fileName != null && dirName != null ) {
      ComposeFrame.LastAttachDir = dirName;

      File dirFile = new File( dirName );
      File attachFile = new File( dirFile, fileName );

      String contentType = FileTypeMap.getDefaultFileTypeMap().getContentType( attachFile );

      String attachName = attachFile.getName().trim();
      //String attachName = attachFile.getName() + " (" + contentType + ")";

      attachItem( attachFile, attachName );
    }
  }

  private void
  detachFile() {
    int idx = attachComboBox_.getSelectedIndex();
    if ( idx >= 0 ) {
      attachments_.removeElementAt( idx );
      attachComboBox_.removeItemAt( idx );
      attachComboBox_.validate();
      modified_ = true;
    }
  }

  private void
  attachSelection( String text ) {
    if ( text != null && text.length() > 0 ) {
      textAttachmentSequence_++;

      String attachName =
        "Text_" + textAttachmentSequence_ + " (text/plain) " + text.length() + " bytes";

      attachItem( text, attachName );
      messageText_.cut();
    }
  }

  private void
  prefixSelection() {
    String selectedText = messageText_.getSelectedText();

    if ( selectedText != null && selectedText.length() > 0 ) {
      StringBuffer buf = new StringBuffer();

      String xprefix = JOptionPane.showInputDialog(
                        ICEMail.getBundle().getString( "Compose.Prefix.dialog.message" ) );

      if ( xprefix != null ) {
        collate( buf, xprefix, selectedText );
        messageText_.replaceSelection( buf.toString() );
        modified_ = true;
      }
    }
  }

  private void
  printMessage() {
    try {
      MimeMessage[] msgs = new MimeMessage[1];

      msgs[0] = buildMessage();
      buildHeader( msgs[0] );
      msgs[0].saveChanges();

      PrintMessageThread pThread = new PrintMessageThread( this, msgs );

      pThread.start();
    } catch ( MessagingException xex ) {
      Object[] xargs = new Object[1];
      xargs[0] = xex.getMessage();
      ComponentFactory.showDialog( ICEMail.getBundle(), "Compose.PrintingException",
                                   0, JOptionPane.ERROR_MESSAGE, xargs );
    }
  }

  private void
  sendMessage() {
    boolean xencrypt = encryptButton_ == null ? false : encryptButton_.current() > 0;
    boolean xsign = signButton_ == null ? false : signButton_.current() > 0;
    boolean xclearsign = signButton_ == null ? false : signButton_.current() == 2;

    try {
      MimeMessage xmessage = buildMessage();
      xmessage.saveChanges();

      if ( xencrypt || xsign ) {
        String charSet = charsetLbl_.getText();
        String fromStr = fromText_.getText().trim();
        InternetAddress[] addrs = MessageUtilities.encodeAddresses( fromStr, charSet );
        xmessage.setFrom( addrs[0] );

        String addrStr;
        Vector addrV = new Vector();
        InternetAddress[] recipAddrs = null;

        if ( xencrypt ) {
          addrStr = toText_.getText().trim();
          recipAddrs = MessageUtilities.encodeAddresses( addrStr, charSet );
          for ( int i = 0 ; i < recipAddrs.length ; ++i ) {
            addrV.addElement( recipAddrs[i] );
          }

          addrStr = ccText_.getText().trim();
          recipAddrs = MessageUtilities.encodeAddresses( addrStr, charSet );
          for ( int i = 0 ; i < recipAddrs.length ; ++i ) {
            addrV.addElement( recipAddrs[i] );
          }

          addrStr = bccText_.getText().trim();
          recipAddrs = MessageUtilities.encodeAddresses( addrStr, charSet );
          for ( int i = 0 ; i < recipAddrs.length ; ++i ) {
            addrV.addElement( recipAddrs[i] );
          }

          recipAddrs = new InternetAddress[ addrV.size() ];
          addrV.copyInto( recipAddrs );
        } else {
          recipAddrs = new InternetAddress[0];
        }

        if ( xencrypt ) {
          xclearsign = false;
        }

        xmessage =
          ICEMail.getSMIMELibrary().buildSMimeMessage( ICEMail.getDefaultSession(),
                                                       xmessage, addrs[0], recipAddrs,
                                                       xsign, xclearsign, xencrypt );
      }

      buildHeader( xmessage );
      xmessage.saveChanges();

      SendMessageThread thread = new SendMessageThread( this, xmessage );
      thread.start();
    } catch ( MissingCertificateException ex ) {
      Object[] xargs = { ex.getMessage() };
      if ( xsign ) {
        ComponentFactory.showDialog( ICEMail.getBundle(), "Compose.MissingCert1",
                                     0, JOptionPane.WARNING_MESSAGE, xargs );
      } else {
        ComponentFactory.showDialog( ICEMail.getBundle(), "Compose.MissingCert2",
                                     0, JOptionPane.WARNING_MESSAGE, xargs );
      }