srecord noeq JTextFileEditor(File file) is Swingable {
  JTextArea textArea;
  JButton btnReload, btnSave;
  S fileContents, savedText;
  FileWatchService fileWatcher;
  ReliableSingleThread rstLoad = rstWithPreDelay(1.0, r _load);
  
  cachedVisualize {
    assertNotNull(file);
    savedText = fileContents = loadTextFile(file);
    textArea = wordWrapTypeWriterTextArea(savedText);
    onChange(textArea, l0updateSaveButton);
    
    bindToComponent(textArea, -> {
      fileWatcher = new FileWatchService;
      fileWatcher.addListener(file, f -> rstLoad!);
      rstLoad!;
    }, -> { dispose fileWatcher; });
    
    ret northAndCenterWithMargin(
      centerAndEastWithMargin(
        swing(-> JFilePathLabel(file)),
        jline(
          btnSave = disableButton(jbutton("Save", r save)),
          btnReload = jbutton("Reload", r reload)
        )),
      textArea
    );
  }
  
  void updateSaveButton {
    setEnabled(btnSave, !eq(savedText, getText(textArea)));
  }
  
  void save {
    saveTextFile(file, savedText = getText(textArea));
  }
  
  void reload {
    savedText = fileContents;
    setText(textArea, savedText);
  }
  
  void _load {
    fileContents = loadTextFile(file);
    setEnabled(btnReload, !eq(fileContents, savedText));
  }
}