Module | Sass::SCSS::RX |
In: |
lib/sass/scss/rx.rb
|
A module containing regular expressions used for lexing tokens in an SCSS document. Most of these are taken from [the CSS3 spec](www.w3.org/TR/css3-syntax/#lexical), although some have been modified for various reasons.
H | = | /[0-9a-fA-F]/ | ||
NL | = | /\n|\r\n|\r|\f/ | ||
UNICODE | = | /\\#{H}{1,6}[ \t\r\n\f]?/ | ||
NONASCII | = | /[#{s}]/ | ||
ESCAPE | = | /#{UNICODE}|\\[ -~#{s}]/ | ||
NMSTART | = | /[a-zA-Z]|#{NONASCII}|#{ESCAPE}/ | ||
NMCHAR | = | /[a-zA-Z0-9_-]|#{NONASCII}|#{ESCAPE}/ | ||
STRING1 | = | /\"((?:[^\n\r\f\\"]|\\#{NL}|#{ESCAPE})*)\"/ | ||
STRING2 | = | /\'((?:[^\n\r\f\\']|\\#{NL}|#{ESCAPE})*)\'/ | ||
IDENT | = | /[-_]?#{NMSTART}#{NMCHAR}*/ | ||
NAME | = | /#{NMCHAR}+/ | ||
NUM | = | /[0-9]+|[0-9]*.[0-9]+/ | ||
STRING | = | /#{STRING1}|#{STRING2}/ | ||
URLCHAR | = | /[#%&*-~]|#{NONASCII}|#{ESCAPE}/ | ||
URL | = | /(#{URLCHAR}*)/ | ||
W | = | /[ \t\r\n\f]*/ | ||
RANGE | = | /(?:#{H}|\?){1,6}/ | This is more liberal than the spec‘s definition, but that definition didn‘t work well with the greediness rules | |
S | = | /[ \t\r\n\f]+/ | ||
COMMENT | = | /\/\*[^*]*\*+(?:[^\/][^*]*\*+)*\// | ||
SINGLE_LINE_COMMENT | = | /\/\/.*(\n[ \t]*\/\/.*)*/ | ||
CDO | = | quote("<!--") | ||
CDC | = | quote("-->") | ||
INCLUDES | = | quote("~=") | ||
DASHMATCH | = | quote("|=") | ||
PREFIXMATCH | = | quote("^=") | ||
SUFFIXMATCH | = | quote("$=") | ||
SUBSTRINGMATCH | = | quote("*=") | ||
HASH | = | /##{NAME}/ | ||
IMPORTANT | = | /!#{W}important/i | ||
DEFAULT | = | /!#{W}default/i | ||
NUMBER | = | /#{NUM}(?:#{IDENT}|%)?/ | ||
URI | = | /url\(#{W}(?:#{STRING}|#{URL})#{W}\)/i | ||
FUNCTION | = | /#{IDENT}\(/ | ||
UNICODERANGE | = | /u\+(?:#{H}{1,6}-#{H}{1,6}|#{RANGE})/i | ||
PLUS | = | /#{W}\+/ | Defined in www.w3.org/TR/css3-selectors/#lex | |
GREATER | = | /#{W}>/ | ||
TILDE | = | /#{W}~/ | ||
NOT | = | quote(":not(", Regexp::IGNORECASE) | ||
HEXCOLOR | = | /\#[0-9a-fA-F]{3}(?:[0-9a-fA-F]{3})?/ | Custom | |
INTERP_START | = | /#\{/ | ||
STRING1_NOINTERP | = | /\"((?:[^\n\r\f\\"#]|#(?!\{)|\\#{NL}|#{ESCAPE})*)\"/ | ||
STRING2_NOINTERP | = | /\'((?:[^\n\r\f\\'#]|#(?!\{)|\\#{NL}|#{ESCAPE})*)\'/ | ||
STRING_NOINTERP | = | /#{STRING1_NOINTERP}|#{STRING2_NOINTERP}/ | ||
STATIC_VALUE | = | /(#{NMCHAR}|#{STRING1_NOINTERP}|\s(?!%)|#[a-f0-9]|[,%]|\.[0-9]|\!important)+(?=[;}])/i | ||
STATIC_SELECTOR | = | /(#{NMCHAR}|\s|[,>+*]|[:#.]#{NMSTART})+(?=[{])/i |
Escapes a single character for a CSS identifier.
@param c [String] The character to escape. Should have length 1 @return [String] The escaped character @private
# File lib/sass/scss/rx.rb, line 33 33: def self.escape_char(c) 34: return "\\%06x" % Haml::Util.ord(c) unless c =~ /[ -\/:-~]/ 35: return "\\#{c}" 36: end
Takes a string and returns a CSS identifier that will have the value of the given string.
@param str [String] The string to escape @return [String] The escaped string
# File lib/sass/scss/rx.rb, line 13 13: def self.escape_ident(str) 14: return "" if str.empty? 15: return "\\#{str}" if str == '-' || str == '_' 16: out = "" 17: value = str.dup 18: out << value.slice!(0...1) if value =~ /^[-_]/ 19: if value[0...1] =~ NMSTART 20: out << value.slice!(0...1) 21: else 22: out << escape_char(value.slice!(0...1)) 23: end 24: out << value.gsub(/[^a-zA-Z0-9_-]/) {|c| escape_char c} 25: return out 26: end
Creates a Regexp from a plain text string, escaping all significant characters.
@param str [String] The text of the regexp @param flags [Fixnum] Flags for the created regular expression @return [Regexp] @private
# File lib/sass/scss/rx.rb, line 45 45: def self.quote(str, flags = 0) 46: Regexp.new(Regexp.quote(str), flags) 47: end