public void evaluate() {
try {
// clear problems and console messages
problemsView.setText("");
consoleView.setText("");
// update status view
statusView.setText(" Parsing ...");
tabbedPane.setSelectedIndex(0);
LispExpr root = Parser.parse(textView.getText());
statusView.setText(" Running ...");
tabbedPane.setSelectedIndex(1);
// update run button
runButton.setIcon(stopImage);
runButton.setActionCommand("Stop");
// start run thread
runThread = new RunThread(root);
runThread.start();
} catch (SyntaxError e) {
tabbedPane.setSelectedIndex(0);
System.err.println(
"Syntax Error at " + e.getLine() + ", " + e.getColumn() + " : " + e.getMessage());
} catch (Error e) {
// parsing error
System.err.println(e.getMessage());
statusView.setText(" Errors.");
}
}
public void run() {
try {
while (runThread == this) {
interpreter.evaluate(program);
break;
}
} catch (Error e) {
tabbedPane.setSelectedIndex(0);
System.err.println("Runtime Error: " + e.getMessage());
}
// notify GUI that program execution finished
runFinished();
}
public void prettyPrint() {
try {
// clear old problem messages
problemsView.setText("");
// update status view
statusView.setText(" Parsing ...");
LispExpr root = Parser.parse(textView.getText());
statusView.setText(" Pretty Printing ...");
String newText = PrettyPrinter.prettyPrint(root);
textView.setText(newText);
statusView.setText(" Done.");
} catch (Error e) {
System.err.println(e.getMessage());
statusView.setText(" Errors.");
}
}