import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ExtendedModifyEvent;
import org.eclipse.swt.custom.ExtendedModifyListener;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class SyntaxColoring {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
final StyledText styledText = new StyledText(shell, SWT.V_SCROLL | SWT.BORDER);
final String PUNCTUATION = "(){}";
styledText.addExtendedModifyListener(new ExtendedModifyListener() {
public void modifyText(ExtendedModifyEvent event) {
int end = event.start + event.length - 1;
if (event.start <= end) {
String text = styledText.getText(event.start, end);
java.util.List ranges = new java.util.ArrayList();
for (int i = 0, n = text.length(); i < n; i++) {
if (PUNCTUATION.indexOf(text.charAt(i)) > -1) {
ranges.add(new StyleRange(event.start + i, 1, display.getSystemColor(SWT.COLOR_BLUE),
null, SWT.BOLD));
}
}
if (!ranges.isEmpty()) {
styledText.replaceStyleRanges(event.start, event.length, (StyleRange[]) ranges
.toArray(new StyleRange[0]));
}
}
}
});
styledText.setBounds(10, 10, 500, 100);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}