private void updateTemplateFromEditor(PrintfTemplate template) {
    ArrayList params = new ArrayList();
    String format = null;
    int text_length = editorPane.getDocument().getLength();
    try {
      format = editorPane.getDocument().getText(0, text_length);
    } catch (BadLocationException ex1) {
    }
    Element section_el = editorPane.getDocument().getDefaultRootElement();
    // Get number of paragraphs.
    int num_para = section_el.getElementCount();
    for (int p_count = 0; p_count < num_para; p_count++) {
      Element para_el = section_el.getElement(p_count);
      // Enumerate the content elements
      int num_cont = para_el.getElementCount();
      for (int c_count = 0; c_count < num_cont; c_count++) {
        Element content_el = para_el.getElement(c_count);
        AttributeSet attr = content_el.getAttributes();
        // Get the name of the style applied to this content element; may be null
        String sn = (String) attr.getAttribute(StyleConstants.NameAttribute);
        // Check if style name match
        if (sn != null && sn.startsWith("Parameter")) {
          // we extract the label.
          JLabel l = (JLabel) StyleConstants.getComponent(attr);
          if (l != null) {
            params.add(l.getName());
          }
        }
      }
    }

    template.setFormat(format);
    template.setTokens(params);
  }
  private void displayMessage(String text, AttributeSet as) {
    try {
      if (!text.endsWith("\n")) {
        text += "\n";
      }
      jTextPaneDisplayMessages
          .getDocument()
          .insertString(jTextPaneDisplayMessages.getDocument().getLength(), text, as);

      jTextPaneDisplayMessages.setCaretPosition(jTextPaneDisplayMessages.getDocument().getLength());
    } catch (BadLocationException ex) {
    }
  }
  private void updateEditorView() {
    editorPane.setText("");
    numParameters = 0;
    try {
      java.util.List elements = editableTemplate.getPrintfElements();
      for (Iterator it = elements.iterator(); it.hasNext(); ) {
        PrintfUtil.PrintfElement el = (PrintfUtil.PrintfElement) it.next();
        if (el.getFormat().equals(PrintfUtil.PrintfElement.FORMAT_NONE)) {
          appendText(el.getElement(), PLAIN_ATTR);
        } else {
          insertParameter(
              (ConfigParamDescr) paramKeys.get(el.getElement()),
              el.getFormat(),
              editorPane.getDocument().getLength());
        }
      }
    } catch (Exception ex) {
      JOptionPane.showMessageDialog(
          this,
          "Invalid Format: " + ex.getMessage(),
          "Invalid Printf Format",
          JOptionPane.ERROR_MESSAGE);

      selectedPane = 1;
      printfTabPane.setSelectedIndex(selectedPane);
      updatePane(selectedPane);
    }
  }
 private void addText(String str, String styleName, JTextPane pane) {
   Document doc = pane.getDocument();
   int len = doc.getLength();
   try {
     doc.insertString(len, str, pane.getStyle(styleName));
   } catch (javax.swing.text.BadLocationException e) {
   }
 }
 public void caretUpdate(CaretEvent e) {
   // when the cursor moves on _textView
   // this method will be called. Then, we
   // must determine what the line number is
   // and update the line number view
   Element root = textView.getDocument().getDefaultRootElement();
   int line = root.getElementIndex(e.getDot());
   root = root.getElement(line);
   int col = root.getElementIndex(e.getDot());
   lineNumberView.setText(line + ":" + col);
   // if text is selected then enable copy and cut
   boolean isSelection = e.getDot() != e.getMark();
   copyAction.setEnabled(isSelection);
   cutAction.setEnabled(isSelection);
 }
  private void insertParameter(ConfigParamDescr descr, String format, int pos) {
    try {
      StyledDocument doc = (StyledDocument) editorPane.getDocument();

      // The component must first be wrapped in a style
      Style style = doc.addStyle("Parameter-" + numParameters, null);
      JLabel label = new JLabel(descr.getDisplayName());
      label.setAlignmentY(0.8f); // make sure we line up
      label.setFont(new Font("Helvetica", Font.PLAIN, 14));
      label.setForeground(Color.BLUE);
      label.setName(descr.getKey());
      label.setToolTipText("key: " + descr.getKey() + "    format: " + format);
      StyleConstants.setComponent(style, label);
      doc.insertString(pos, format, style);
      numParameters++;
    } catch (BadLocationException e) {
    }
  }
  public InterpreterFrame() {
    super("Simple Lisp Interpreter");

    // Create the menu
    menubar = buildMenuBar();
    setJMenuBar(menubar);
    // Create the toolbar
    toolbar = buildToolBar();
    // disable cut and copy actions
    cutAction.setEnabled(false);
    copyAction.setEnabled(false);
    // Setup text area for editing source code
    // and setup document listener so interpreter
    // is notified when current file modified and
    // when the cursor is moved.
    textView = buildEditor();
    textView.getDocument().addDocumentListener(this);
    textView.addCaretListener(this);

    // set default key bindings
    bindKeyToCommand("ctrl C", "(buffer-copy)");
    bindKeyToCommand("ctrl X", "(buffer-cut)");
    bindKeyToCommand("ctrl V", "(buffer-paste)");
    bindKeyToCommand("ctrl E", "(buffer-eval)");
    bindKeyToCommand("ctrl O", "(file-open)");
    bindKeyToCommand("ctrl S", "(file-save)");
    bindKeyToCommand("ctrl Q", "(exit)");

    // Give text view scrolling capability
    Border border =
        BorderFactory.createCompoundBorder(
            BorderFactory.createEmptyBorder(3, 3, 3, 3),
            BorderFactory.createLineBorder(Color.gray));
    JScrollPane topSplit = addScrollers(textView);
    topSplit.setBorder(border);

    // Create tabbed pane for console/problems
    consoleView = makeConsoleArea(10, 50, true);
    problemsView = makeConsoleArea(10, 50, false);
    tabbedPane = buildProblemsConsole();

    // Plug the editor and problems/console together
    // using a split pane. This allows one to change
    // their relative size using the split-bar in
    // between them.
    splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, topSplit, tabbedPane);

    // Create status bar
    statusView = new JLabel(" Status");
    lineNumberView = new JLabel("0:0");
    statusbar = buildStatusBar();

    // Now, create the outer panel which holds
    // everything together
    outerpanel = new JPanel();
    outerpanel.setLayout(new BorderLayout());
    outerpanel.add(toolbar, BorderLayout.PAGE_START);
    outerpanel.add(splitPane, BorderLayout.CENTER);
    outerpanel.add(statusbar, BorderLayout.SOUTH);
    getContentPane().add(outerpanel);

    // tell frame to fire a WindowsListener event
    // but not to close when "x" button clicked.
    setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
    addWindowListener(this);
    // set minimised icon to use
    setIconImage(makeImageIcon("spi.png").getImage());

    // setup additional internal functions
    InternalFunctions.setup_internals(interpreter, this);

    // set default window size
    Component top = splitPane.getTopComponent();
    Component bottom = splitPane.getBottomComponent();
    top.setPreferredSize(new Dimension(100, 400));
    bottom.setPreferredSize(new Dimension(100, 200));
    pack();

    // load + run user configuration file (if there is one)
    String homedir = System.getProperty("user.home");
    try {
      interpreter.load(homedir + "/.simplelisp");
    } catch (FileNotFoundException e) {
      // do nothing if file does not exist!
      System.out.println("Didn't find \"" + homedir + "/.simplelisp\"");
    }

    textView.grabFocus();
    setVisible(true);

    // redirect all I/O to problems/console
    redirectIO();

    // start highlighter thread
    highlighter = new DisplayThread(250);
    highlighter.setDaemon(true);
    highlighter.start();
  }
 private void appendText(String text, AttributeSet set) {
   insertText(text, set, editorPane.getDocument().getLength());
 }
 private void insertText(String text, AttributeSet set, int pos) {
   try {
     editorPane.getDocument().insertString(pos, text, set);
   } catch (BadLocationException ex) {
   }
 }