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 runFinished() {
// program execution finished so update
// status and run button accordingly
if (runThread == null) {
// _runThread = null only if
// execution stopped by user via
// run button
statusView.setText(" Stopped.");
} else {
statusView.setText(" Done.");
}
runButton.setActionCommand("Run");
runButton.setIcon(runImage);
}
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.");
}
}
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 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 caretUpdate(CaretEvent e) {
// when the cursor moves on _textView
// this method will be called. Then, we
// must determine what the line number is
// and update the line number view
Element root = textView.getDocument().getDefaultRootElement();
int line = root.getElementIndex(e.getDot());
root = root.getElement(line);
int col = root.getElementIndex(e.getDot());
lineNumberView.setText(line + ":" + col);
// if text is selected then enable copy and cut
boolean isSelection = e.getDot() != e.getMark();
copyAction.setEnabled(isSelection);
cutAction.setEnabled(isSelection);
}
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 openFile() {
if (!dirty || checkForSave()) {
if (fileChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
file = fileChooser.getSelectedFile();
} else {
// user cancelled open after all
return;
}
// load file into text view
textView.setText(physReadTextFile(file));
// update status
statusView.setText(" Loaded file \"" + file.getName() + "\".");
// reset dirty bit
dirty = false;
}
}
