private void insertBreakInMLC(ActionEvent e, RSyntaxTextArea textArea, int line) { Matcher m = null; int start = -1; int end = -1; try { start = textArea.getLineStartOffset(line); end = textArea.getLineEndOffset(line); String text = textArea.getText(start, end - start); m = p.matcher(text); } catch (BadLocationException ble) { // Never happens UIManager.getLookAndFeel().provideErrorFeedback(textArea); ble.printStackTrace(); return; } if (m.lookingAt()) { String leadingWS = m.group(1); String mlcMarker = m.group(2); // If the caret is "inside" any leading whitespace or MLC // marker, move it to the end of the line. int dot = textArea.getCaretPosition(); if (dot >= start && dot < start + leadingWS.length() + mlcMarker.length()) { // If we're in the whitespace before the very start of the // MLC though, just insert a normal newline if (mlcMarker.charAt(0) == '/') { handleInsertBreak(textArea, true); return; } textArea.setCaretPosition(end - 1); } boolean firstMlcLine = mlcMarker.charAt(0) == '/'; boolean nested = appearsNested(textArea, line, start + leadingWS.length() + 2); String header = leadingWS + (firstMlcLine ? " * " : "*") + m.group(3); textArea.replaceSelection("\n" + header); if (nested) { dot = textArea.getCaretPosition(); // Has changed textArea.insert("\n" + leadingWS + " */", dot); textArea.setCaretPosition(dot); } } else { handleInsertBreak(textArea, true); } }