comparison mercurial/templatefilters.py @ 49494:c96ed4029fda

templates: add filter to reverse list

The filter supports only lists because for lists, it’s straightforward to
implement. Reversing text doesn’t seem very useful and is hard to implement.
Reversing the bytes would break multi-bytes encodings. Reversing the code
points would break characters consisting of multiple code points. Reversing
graphemes is non-trivial without using a library not included in the standard
library.

49493:4367c46a89ee

    interpreting it as per RFC 5322.
    """
    return stringutil.person(author)


@templatefilter(b'revescape', intype=bytes)
def revescape(text):
    """Any text. Escapes all "special" characters, except @.
    Forward slashes are escaped twice to prevent web servers from prematurely
    unescaping them. For example, "@foo bar/baz" becomes "@foo%20bar%252Fbaz".

49494:c96ed4029fda

    interpreting it as per RFC 5322.
    """
    return stringutil.person(author)


@templatefilter(b'reverse')
def reverse(list_):
    """List. Reverses the order of list items."""
    if isinstance(list_, list):
        return templateutil.hybridlist(list_[::-1], name=b'item')
    raise error.ParseError(_(b'not reversible'))


@templatefilter(b'revescape', intype=bytes)
def revescape(text):
    """Any text. Escapes all "special" characters, except @.
    Forward slashes are escaped twice to prevent web servers from prematurely
    unescaping them. For example, "@foo bar/baz" becomes "@foo%20bar%252Fbaz".