src/camidion/chordhelper/midieditor/Base64Dialog.java

   1 package camidion.chordhelper.midieditor;
   2 import java.awt.Dimension;
   3 import java.awt.event.ActionEvent;
   4 import java.io.IOException;
   5 import java.util.regex.Pattern;
   6
   7 import javax.sound.midi.InvalidMidiDataException;
   8 import javax.swing.AbstractAction;
   9 import javax.swing.Action;
  10 import javax.swing.Box;
  11 import javax.swing.BoxLayout;
  12 import javax.swing.JButton;
  13 import javax.swing.JDialog;
  14 import javax.swing.JLabel;
  15 import javax.swing.JOptionPane;
  16 import javax.swing.JPanel;
  17 import javax.swing.JScrollPane;
  18 import javax.swing.JTextArea;
  19
  20 import org.apache.commons.codec.binary.Base64;
  21
  22 import camidion.chordhelper.ButtonIcon;
  23 import camidion.chordhelper.ChordHelperApplet;
  24
  25 /**
  26  * Base64テキスト入力ダイアログ
  27  */
  28 public class Base64Dialog extends JDialog {
  29         private Base64TextArea base64TextArea = new Base64TextArea(8,56);
  30         private MidiSequenceEditorDialog midiEditor;
  31         /**
  32          * Base64デコードアクション
  33          */
  34         public Action addBase64Action = new AbstractAction(
  35                 "Base64 Decode & Add to PlayList",
  36                 new ButtonIcon(ButtonIcon.EJECT_ICON)
  37         ) {
  38                 {
  39                         putValue(
  40                                 Action.SHORT_DESCRIPTION,
  41                                 "Base64デコードして、プレイリストへ追加"
  42                         );
  43                 }
  44                 @Override
  45                 public void actionPerformed(ActionEvent event) {
  46                         byte[] data = getMIDIData();
  47                         if( data == null || data.length == 0 ) {
  48                                 String message = "No data entered - データが入力されていません。";
  49                                 JOptionPane.showMessageDialog(
  50                                         Base64Dialog.this, message,
  51                                         ChordHelperApplet.VersionInfo.NAME,
  52                                         JOptionPane.WARNING_MESSAGE
  53                                 );
  54                                 base64TextArea.requestFocusInWindow();
  55                                 return;
  56                         }
  57                         PlaylistTableModel sltm = midiEditor.sequenceListTable.getModel();
  58                         try {
  59                                 sltm.addSequence(data, null);
  60                         } catch(IOException | InvalidMidiDataException e) {
  61                                 String message = "例外 "+e+" が発生しました。"+e.getMessage();
  62                                 e.printStackTrace();
  63                                 midiEditor.showWarning(message);
  64                                 base64TextArea.requestFocusInWindow();
  65                                 return;
  66                         }
  67                         setVisible(false);
  68                 }
  69         };
  70         /**
  71          * Base64テキストクリアアクション
  72          */
  73         public Action clearAction = new AbstractAction("Clear") {
  74                 @Override
  75                 public void actionPerformed(ActionEvent e) {
  76                         base64TextArea.setText(null);
  77                 }
  78         };
  79         private static class Base64TextArea extends JTextArea {
  80                 private static final Pattern headerLine =
  81                         Pattern.compile( "^.*:.*$", Pattern.MULTILINE );
  82                 public Base64TextArea(int rows, int columns) {
  83                         super(rows,columns);
  84                 }
  85                 public byte[] getBinary() {
  86                         String text = headerLine.matcher(getText()).replaceAll("");
  87                         return Base64.decodeBase64(text.getBytes());
  88                 }
  89                 public void setBinary(byte[] binary_data, String content_type, String filename) {
  90                         if( binary_data != null && binary_data.length > 0 ) {
  91                                 String header = "";
  92                                 if( content_type != null && filename != null ) {
  93                                         header += "Content-Type: " + content_type + "; name=\"" + filename + "\"\n";
  94                                         header += "Content-Transfer-Encoding: base64\n";
  95                                         header += "\n";
  96                                 }
  97                                 setText(header + new String(Base64.encodeBase64Chunked(binary_data)) + "\n");
  98                         }
  99                 }
 100         }
 101         /**
 102          * Base64テキスト入力ダイアログを構築します。
 103          * @param midiEditor 親画面となるMIDIエディタ
 104          */
 105         public Base64Dialog(MidiSequenceEditorDialog midiEditor) {
 106                 this.midiEditor = midiEditor;
 107                 setTitle("Base64-encoded MIDI sequence - " + ChordHelperApplet.VersionInfo.NAME);
 108                 try {
 109                         Base64.decodeBase64("".getBytes());
 110                         base64Available = true;
 111                 } catch( NoClassDefFoundError e ) {
 112                         base64Available = false;
 113                 }
 114                 if( base64Available ) {
 115                         add(new JPanel() {{
 116                                 setLayout(new BoxLayout(this, BoxLayout.PAGE_AXIS));
 117                                 add(new JPanel() {{
 118                                         setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS));
 119                                         add(new JLabel("Base64-encoded MIDI sequence:"));
 120                                         add(Box.createRigidArea(new Dimension(10, 0)));
 121                                         add(new JButton(addBase64Action){{setMargin(ChordHelperApplet.ZERO_INSETS);}});
 122                                         add(new JButton(clearAction){{setMargin(ChordHelperApplet.ZERO_INSETS);}});
 123                                 }});
 124                                 add(new JScrollPane(base64TextArea));
 125                         }});
 126                 }
 127                 setBounds( 300, 250, 660, 300 );
 128         }
 129         private boolean base64Available;
 130         /**
 131          * {@link Base64} が使用できるかどうかを返します。
 132          * @return Apache Commons Codec ライブラリが利用できる状態ならtrue
 133          */
 134         public boolean isBase64Available() {
 135                 return base64Available;
 136         }
 137         /**
 138          * バイナリー形式でMIDIデータを返します。
 139          * @return バイナリー形式のMIDIデータ
 140          */
 141         public byte[] getMIDIData() {
 142                 return base64TextArea.getBinary();
 143         }
 144         /**
 145          * バイナリー形式のMIDIデータを設定します。
 146          * @param midiData バイナリー形式のMIDIデータ
 147          */
 148         public void setMIDIData( byte[] midiData ) {
 149                 base64TextArea.setBinary(midiData, null, null);
 150         }
 151         /**
 152          * バイナリー形式のMIDIデータを、ファイル名をつけて設定します。
 153          * @param midiData バイナリー形式のMIDIデータ
 154          * @param filename ファイル名
 155          */
 156         public void setMIDIData( byte[] midiData, String filename ) {
 157                 base64TextArea.setBinary(midiData, "audio/midi", filename);
 158                 base64TextArea.selectAll();
 159         }
 160         /**
 161          * Base64形式でMIDIデータを返します。
 162          * @return  Base64形式のMIDIデータ
 163          */
 164         public String getBase64Data() {
 165                 return base64TextArea.getText();
 166         }
 167         /**
 168          * Base64形式のMIDIデータを設定します。
 169          * @param base64Data Base64形式のMIDIデータ
 170          */
 171         public void setBase64Data( String base64Data ) {
 172                 base64TextArea.setText(null);
 173                 base64TextArea.append(base64Data);
 174         }
 175 }