setPreferredSize(new Dimension(100, 100));
// create the RSyntaxArea as an editor for the REPL
textArea = SwingFactory.createSyntaxTextArea("repl", welcome);
final RTextScrollPane scrollPane = new RTextScrollPane(textArea);
textArea.addKeyListener(new CodeAssistant(textArea));
// a key listener to process CTRL + Enter (= submit a command)
textArea.addKeyListener(new KeyAdapter() {
private int arrow = 0;
private String lastInserted = "";
@Override
public void keyReleased(KeyEvent event) {
int code = event.getKeyCode();
if (code == 17) {
arrow = 0;
lastInserted = "";
}
}
@Override
public void keyPressed(KeyEvent event) {
int code = event.getKeyCode();
int modifiers = event.getModifiers();
int caret = textArea.getCaretPosition();
int last = textArea.getText().lastIndexOf(">> ") + 3;
/**
* Make old parts non editable
*/
if ((!(code == KeyEvent.VK_C && modifiers == KeyEvent.CTRL_MASK) && code != KeyEvent.VK_CONTROL) && caret <= last) {
if (code == KeyEvent.VK_BACK_SPACE) {
textArea.append(" ");
textArea.setCaretPosition(last + 1);
}
textArea.setCaretPosition(textArea.getText().length());
}
/**
* C + CTRL --> CANCEL
*/
if (code == KeyEvent.VK_C && modifiers == KeyEvent.CTRL_MASK) {
if (textArea.getSelectedText() == null)
textArea.append(" [CANCEL]\n>> ");
}
/**
* ARROW-UP + CTRL --> HISTORY
*/
if (code == 38 && modifiers == KeyEvent.CTRL_MASK) {
if (history.size() > arrow) {
String text = textArea.getText();
textArea.setText(text.substring(0, text.length() - lastInserted.length()));
textArea.append(history.get(arrow));
lastInserted = history.get(arrow);
}
if (arrow < history.size())
arrow++;
}
/**
* ARROW-DOWN + CTRL --> HISTORY
*/
if (code == 40 && modifiers == KeyEvent.CTRL_MASK) {
if (history.size() > arrow && arrow <= 0) {
String text = textArea.getText();
textArea.setText(text.substring(0, text.length() - lastInserted.length()));
textArea.append(history.get(arrow));
lastInserted = history.get(arrow);
}
if (arrow > 0)
arrow--;
}
/**
* ENTER + CTRL --> SUBMIT COMMAND
*/
if (code == KeyEvent.VK_ENTER && modifiers == KeyEvent.CTRL_MASK) {
Dimension pref = scrollPane.getPreferredSize();
textArea.setText(textArea.getText() + Literal.NL);
try {
int lines = textArea.getLineCount();
try {
String commands = "";
int lineCount = 2;
while (true) {
// if we have the first line of the command
if (commands.startsWith(">>")) {
commands = commands.replaceFirst(">>", "").trim();
break;
}
// if we have another line
else {
Element line = textArea.getDocument().getDefaultRootElement().getElement(lines - lineCount);
int lineStart = line.getStartOffset();
int lineEnd = line.getEndOffset();
commands = textArea.getText(lineStart, lineEnd - lineStart) + commands;
lineCount++;
}
}
logger.info("Input: " + commands);
history.add(0, commands);
Parser parser = interpreter.getParser();
// + nl, otherwise there will be errors
commands = parser.format(commands + "\n");
List<LObject> objects = parser.parseAll(commands);
Executer.instance.evaluate(textArea, objects, interpreter);
}
catch (Exception e) {
textArea.setText(textArea.getText() + "Error" + "\n>> ");
logger.warn("[interpreter exception] - " + e.getMessage(), e);
}
}
catch (ArrayIndexOutOfBoundsException e) {
// ignore
}
scrollPane.setPreferredSize(pref);
}
}
});
AutoCompletion autoCompletion = new AutoCompletion(provider);