CSS-Sass

 view release on metacpan or  search on metacpan

libsass/prelexer.cpp  view on Meta::CPAN

      return sequence< one_plus< sequence< zero_plus< alternatives< identifier, exactly<'-'> > >,
                                 interpolant,
                                 zero_plus< alternatives< identifier, number, exactly<'-'> > > > >,
                       negate< exactly<'%'> > >(src);
    }

    // interpolants can be recursive/nested
    const char* interpolant(const char* src) {
      return recursive_scopes< exactly<hash_lbrace>, exactly<rbrace> >(src);
    }

    // $re_squote = /'(?:$re_itplnt|\\.|[^'])*'/
    const char* single_quoted_string(const char* src) {
      // match a single quoted string, while skipping interpolants
      return sequence <
        exactly <'\''>,
        zero_plus <
          alternatives <
            // skip all escaped chars first
            escape_seq,
            // skip interpolants
            interpolant,
            // skip non delimiters
            any_char_but < '\'' >
          >
        >,
        exactly <'\''>
      >(src);
    }

    // $re_dquote = /"(?:$re_itp|\\.|[^"])*"/
    const char* double_quoted_string(const char* src) {
      // match a single quoted string, while skipping interpolants
      return sequence <
        exactly <'"'>,
        zero_plus <
          alternatives <
            // skip all escaped chars first
            escape_seq,
            // skip interpolants
            interpolant,
            // skip non delimiters
            any_char_but < '"' >
          >
        >,
        exactly <'"'>
      >(src);
    }

    // $re_quoted = /(?:$re_squote|$re_dquote)/
    const char* quoted_string(const char* src) {
      // match a quoted string, while skipping interpolants
      return alternatives<
        single_quoted_string,
        double_quoted_string
      >(src);
    }

    const char* value_schema(const char* src) {
      // follows this pattern: ([xyz]*i[xyz]*)+
      return one_plus< sequence< zero_plus< alternatives< identifier, percentage, dimension, hex, number, quoted_string > >,
                                 interpolant,
                                 zero_plus< alternatives< identifier, percentage, dimension, hex, number, quoted_string, exactly<'%'> > > > >(src);
    }

    /* not used anymore - remove?
    const char* filename(const char* src) {
      return one_plus< alternatives< identifier, number, exactly<'.'> > >(src);
    }
    */

    // Match CSS '@' keywords.
    const char* at_keyword(const char* src) {
      return sequence<exactly<'@'>, identifier>(src);
    }

    const char* kwd_sel_deep(const char* src) {
      return word<sel_deep_kwd>(src);
    }

    const char* kwd_import(const char* src) {
      return word<import_kwd>(src);
    }

    const char* kwd_at_root(const char* src) {
      return word<at_root_kwd>(src);
    }

    const char* kwd_with_directive(const char* src) {
      return word<with_kwd>(src);
    }

    const char* kwd_without_directive(const char* src) {
      return word<without_kwd>(src);
    }

    const char* kwd_media(const char* src) {
      return word<media_kwd>(src);
    }

    const char* kwd_supports(const char* src) {
      return word<supports_kwd>(src);
    }

    const char* kwd_mixin(const char* src) {
      return word<mixin_kwd>(src);
    }

    const char* kwd_function(const char* src) {
      return word<function_kwd>(src);
    }

    const char* kwd_return_directive(const char* src) {
      return word<return_kwd>(src);
    }

    const char* kwd_include(const char* src) {
      return word<include_kwd>(src);
    }

    const char* kwd_content(const char* src) {
      return word<content_kwd>(src);
    }

libsass/prelexer.cpp  view on Meta::CPAN

    const char* namespace_prefix(const char* src) {
      return sequence< optional< alternatives< identifier, exactly<'*'> > >,
                       exactly<'|'> >(src);
    }
    const char* type_selector(const char* src) {
      return sequence< optional<namespace_prefix>, identifier>(src);
    }
    const char* hyphens_and_identifier(const char* src) {
      return sequence< zero_plus< exactly< '-' > >, identifier >(src);
    }
    const char* hyphens_and_name(const char* src) {
      return sequence< zero_plus< exactly< '-' > >, name >(src);
    }
    const char* universal(const char* src) {
      return sequence< optional<namespace_prefix>, exactly<'*'> >(src);
    }
    // Match CSS id names.
    const char* id_name(const char* src) {
      return sequence<exactly<'#'>, name>(src);
    }
    // Match CSS class names.
    const char* class_name(const char* src) {
      return sequence<exactly<'.'>, identifier>(src);
    }
    // Attribute name in an attribute selector.
    const char* attribute_name(const char* src) {
      return alternatives< sequence< optional<namespace_prefix>, identifier>,
                           identifier >(src);
    }
    // match placeholder selectors
    const char* placeholder(const char* src) {
      return sequence<exactly<'%'>, identifier>(src);
    }
    // Match CSS numeric constants.

    const char* sign(const char* src) {
      return class_char<sign_chars>(src);
    }
    const char* unsigned_number(const char* src) {
      return alternatives<sequence< zero_plus<digits>,
                                    exactly<'.'>,
                                    one_plus<digits> >,
                          digits>(src);
    }
    const char* number(const char* src) {
      return sequence< optional<sign>, unsigned_number>(src);
    }
    const char* coefficient(const char* src) {
      return alternatives< sequence< optional<sign>, digits >,
                           sign >(src);
    }
    const char* binomial(const char* src) {
      return sequence< optional<sign>,
                       optional<digits>,
                       exactly<'n'>,
                       zero_plus < space >,
                       sign,
                       zero_plus < space >,
                       digits >(src);
    }
    const char* percentage(const char* src) {
      return sequence< number, exactly<'%'> >(src);
    }
    const char* ampersand(const char* src) {
      return exactly<'&'>(src);
    }

    /* not used anymore - remove?
    const char* em(const char* src) {
      return sequence< number, exactly<em_kwd> >(src);
    } */
    const char* dimension(const char* src) {
      return sequence<number, one_plus< alpha > >(src);
    }
    const char* hex(const char* src) {
      const char* p = sequence< exactly<'#'>, one_plus<xdigit> >(src);
      ptrdiff_t len = p - src;
      return (len != 4 && len != 7) ? 0 : p;
    }
    const char* hexa(const char* src) {
      const char* p = sequence< exactly<'#'>, one_plus<xdigit> >(src);
      ptrdiff_t len = p - src;
      return (len != 4 && len != 7 && len != 9) ? 0 : p;
    }
    const char* hex0(const char* src) {
      const char* p = sequence< exactly<'0'>, exactly<'x'>, one_plus<xdigit> >(src);
      ptrdiff_t len = p - src;
      return (len != 5 && len != 8) ? 0 : p;
    }

    /* no longer used - remove?
    const char* rgb_prefix(const char* src) {
      return word<rgb_kwd>(src);
    }*/
    // Match CSS uri specifiers.

    const char* uri_prefix(const char* src) {
      return exactly<url_kwd>(src);
    }
    const char* uri_value(const char* src)
    {
      return
      sequence <
        negate <
          exactly < '$' >
        >,
        zero_plus <
          alternatives <
            alnum,
            exactly <'/'>,
            class_char < uri_chars >
          >
        >
      >(src);
    }

    // TODO: rename the following two functions
    /* no longer used - remove?
    const char* uri(const char* src) {
      return sequence< exactly<url_kwd>,
                       optional<spaces>,

libsass/prelexer.cpp  view on Meta::CPAN

        if (!*p) {
          return 0;
        }
        else if (!inside_str && (*p == '"' || *p == '\'')) {
          inside_str = *p;
        }
        else if (*p == inside_str && *(p-1) != '\\') {
          inside_str = 0;
        }
        else if (*p == '(' && !inside_str) {
          ++depth;
        }
        else if (*p == ')' && !inside_str) {
          if (depth == 0) return p;
          else            --depth;
        }
        ++p;
      }
      // unreachable
      return 0;
    }
    */

    // follow the CSS spec more closely and see if this helps us scan URLs correctly
    /* not used anymore - remove?
    const char* NL(const char* src) {
      return alternatives< exactly<'\n'>,
                           sequence< exactly<'\r'>, exactly<'\n'> >,
                           exactly<'\r'>,
                           exactly<'\f'> >(src);
    }*/

    /* not used anymore - remove?
    const char* H(const char* src) {
      return std::isxdigit(*src) ? src+1 : 0;
    }*/

    /* not used anymore - remove?
    const char* unicode(const char* src) {
      return sequence< exactly<'\\'>,
                       between<H, 1, 6>,
                       optional< class_char<url_space_chars> > >(src);
    }*/

    /* not used anymore - remove?
    const char* ESCAPE(const char* src) {
      return alternatives< unicode, class_char<escape_chars> >(src);
    }*/

    const char* static_string(const char* src) {
      const char* pos = src;
      const char * s = quoted_string(pos);
      Token t(pos, s);
      const unsigned int p = count_interval< interpolant >(t.begin, t.end);
      return (p == 0) ? t.end : 0;
    }

    const char* static_component(const char* src) {
      return alternatives< identifier,
                           static_string,
                           percentage,
                           hex,
                           number,
                           sequence< exactly<'!'>, word<important_kwd> >
                          >(src);
    }

    const char* static_value(const char* src) {
      return sequence< sequence<
                         static_component,
                         zero_plus< identifier >
                       >,
                       zero_plus < sequence<
                                   alternatives<
                                     sequence< optional_spaces, alternatives<
                                       exactly < '/' >,
                                       exactly < ',' >,
                                       exactly < ' ' >
                                     >, optional_spaces >,
                                     spaces
                                   >,
                                   static_component
                       > >,
                       optional_css_whitespace,
                       alternatives< exactly<';'>, exactly<'}'> >
                      >(src);
    }
  }
}