Named pages with pseudo-class

[Tontyna]

css for named page with pseudo-class, e.g. @page mypage:left throws error Unsupported @page selector.

To prevent this and make pseudo-class work I altered the function preprocess_stylesheet() in weasyprint/css/__init__.py. Inserted the following code at line 680:

# 19.1.2017: implement named page with pseudo-class
# @page <name>:<left|right|blank|first>
elif (len(tokens) == 3 and
        tokens[0].type == 'ident' and
        tokens[1].type == 'literal' and
        tokens[1].value == ':' and
        tokens[2].type == 'ident'):
    pseudo_class = tokens[2].lower_value
    if pseudo_class in ('left', 'right'):
        types['side'] = pseudo_class
        specificity = (0, 0, 1)
    elif pseudo_class in ('blank', 'first'):
        types[pseudo_class] = True
        specificity = (0, 1, 0)
    else:
        LOGGER.warning('Unknown @page pseudo-class "%s", '
                       'the whole @page rule was ignored '
                       'at %s:%s.',
                       pseudo_class,
                       rule.source_line, rule.source_column)
        continue
    # page-name
    types['name'] = tokens[0].value

[liZe]

Thanks for the report, it should be fixed now (with support of comma-separated multiple page selectors, as defined in https://drafts.csswg.org/css-page-3/#syntax-page-selector). Tests are welcome!

[Tontyna]

Did some tests, works like a charm.
Even combined page pseudo-styles @page :blank:left { ... } are applied correctly.

[liZe]

Did some tests, works like a charm.
Even combined page pseudo-styles @page :blank:left { ... } are applied correctly.

Cool! Thank you!