private void updateDisplay() {
// first, set block colours
textView.setBackground(getColour(backgroundColour("text-background-colour")));
textView.setForeground(getColour(foregroundColour("text-foreground-colour")));
textView.setCaretColor(getColour(foregroundColour("text-caret-colour")));
problemsView.setBackground(getColour(backgroundColour("problems-background-colour")));
problemsView.setForeground(getColour(foregroundColour("problems-foreground-colour")));
consoleView.setBackground(getColour(backgroundColour("console-background-colour")));
consoleView.setForeground(getColour(foregroundColour("console-foreground-colour")));
// second, set colours on the code!
java.util.List<Lexer.Token> tokens = Lexer.tokenise(textView.getText(), true);
int pos = 0;
for (Lexer.Token t : tokens) {
int len = t.toString().length();
if (t instanceof Lexer.RightBrace || t instanceof Lexer.LeftBrace) {
highlightArea(pos, len, foregroundColour("text-brace-colour"));
} else if (t instanceof Lexer.Strung) {
highlightArea(pos, len, foregroundColour("text-string-colour"));
} else if (t instanceof Lexer.Comment) {
highlightArea(pos, len, foregroundColour("text-comment-colour"));
} else if (t instanceof Lexer.Quote) {
highlightArea(pos, len, foregroundColour("text-quote-colour"));
} else if (t instanceof Lexer.Comma) {
highlightArea(pos, len, foregroundColour("text-comma-colour"));
} else if (t instanceof Lexer.Identifier) {
highlightArea(pos, len, foregroundColour("text-identifier-colour"));
} else if (t instanceof Lexer.Integer) {
highlightArea(pos, len, foregroundColour("text-integer-colour"));
}
pos += len;
}
}
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.");
}
}
private void redirectIO() {
// redirect std I/O to console and problems:
// > System.out => console
// > System.err => problems
// > console => System.in
System.setOut(consoleView.getOutputStream());
System.setErr(problemsView.getOutputStream());
// redirect input from console to System.in
System.setIn(consoleView.getInputStream());
}
public void newFile() {
if (!dirty || checkForSave()) {
textView.setText("");
consoleView.setText("");
problemsView.setText("");
statusView.setText(" Created new file.");
file = null;
// reset dirty bit
dirty = false;
}
}
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.");
}
}
private JConsoleArea makeConsoleArea(int width, int height, boolean editable) {
JConsoleArea ta = new JConsoleArea();
ta.setEditable(editable);
return ta;
}