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;
}
}
private boolean checkForSave() {
// build warning message
String message;
if (file == null) {
message = "File has been modified. Save changes?";
} else {
message = "File \"" + file.getName() + "\" has been modified. Save changes?";
}
// show confirm dialog
int r =
JOptionPane.showConfirmDialog(
this,
new JLabel(message),
"Warning!",
JOptionPane.YES_NO_CANCEL_OPTION,
JOptionPane.WARNING_MESSAGE);
if (r == JOptionPane.YES_OPTION) {
// Save File
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
// write the file
physWriteTextFile(fileChooser.getSelectedFile(), textView.getText());
} else {
// user cancelled save after all
return false;
}
}
return r != JOptionPane.CANCEL_OPTION;
}
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 saveFile() {
if (file == null) {
// first save file, so prompt for name.
saveFileAs();
} else {
// file already named so just write it.
physWriteTextFile(file, textView.getText());
// update status
statusView.setText(" Saved file \"" + file.getName() + "\".");
// reset dirty bit
dirty = false;
}
}
public void saveFileAs() {
// Force user to enter new file name
if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
file = fileChooser.getSelectedFile();
} else {
// user cancelled save after all
return;
}
// file selected, so write it.
physWriteTextFile(file, textView.getText());
// update status
statusView.setText(" Saved file \"" + file.getName() + "\".");
// 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.");
}
}