def mousePressEvent(self, event):
        """
        Handle file link clicks.
        """
        super(OutputWindow, self).mousePressEvent(event)
        if self._link_match:
            path = self._link_match.group('url')
            line = self._link_match.group('line')
            if line is not None:
                line = int(line) - 1
            else:
                line = 0
            self.open_file_requested.emit(path, line)
Handle file link clicks.