class jump(Command):
    """:jump [<wrap>]

    Selects first file if current selection is a directory.
    Selects first directory if current selection is a file.
    """
    def execute(self, wrap = True):
        cf = self.fm.thisfile
        passed_cf = False
        for fileobj in self.fm.thisdir.files:
            if fileobj.path == cf.path:
                passed_cf = True
                continue
            elif passed_cf and (fileobj.is_directory if not cf.is_directory else not fileobj.is_directory):
                self.fm.select_file(fileobj.path)
                return
        # exhausted every path
        if wrap:
            for fileobj in self.fm.thisdir.files:
                if fileobj.path == cf.path:
                    # sorry, no hit
                    return
                elif fileobj.is_directory if not cf.is_directory else not fileobj.is_directory:
                    self.fm.select_file(fileobj.path)
                    return